U.S. patent application number 15/477501 was filed with the patent office on 2017-08-03 for power supply management device and machine tool having the power-supply management device.
The applicant listed for this patent is CITIZEN MACHINERY CO., LTD., CITIZEN WATCH CO., LTD. Invention is credited to Satoru Akimoto, Hajime Matsumaru, Hitoshi Matsumoto, Yutaka Shibui, Hiroshi Shinohara, Umeo Tsuyusaki, Shigeo Yanagidaira.
Application Number | 20170220091 15/477501 |
Document ID | / |
Family ID | 45893223 |
Filed Date | 2017-08-03 |
United States Patent
Application |
20170220091 |
Kind Code |
A1 |
Matsumaru; Hajime ; et
al. |
August 3, 2017 |
POWER SUPPLY MANAGEMENT DEVICE AND MACHINE TOOL HAVING THE
POWER-SUPPLY MANAGEMENT DEVICE
Abstract
The present invention provides a power-supply management device
which can efficiently connect and disconnect power supply to an
electric-powered section, and a machine tool including the
power-supply management device. The power-supply management device
(101) detects a synchronization command of a control program, and
compares an operation time of the electric-powered section between
synchronizations in each control system which is a synchronization
target by the synchronization command on the basis of the detected
synchronization command. Then, the power-supply management device
(101) disconnects the power supply to the electric-powered section
belonging to the control system except the control system having
the maximum operation time of the electric-powered section between
the synchronizations, and restarts the power supply at the end of
the synchronization in each control system.
Inventors: |
Matsumaru; Hajime;
(Tokorozawa-shi, JP) ; Akimoto; Satoru;
(Koganei-shi, JP) ; Matsumoto; Hitoshi;
(Kawagoe-shi, JP) ; Shibui; Yutaka; (Kawagoe-shi,
JP) ; Tsuyusaki; Umeo; (Sayama-shi, JP) ;
Shinohara; Hiroshi; (Kawagoe-shi, JP) ; Yanagidaira;
Shigeo; (Tokorozawa-shi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
CITIZEN WATCH CO., LTD
CITIZEN MACHINERY CO., LTD. |
Tokyo
Nagano |
|
JP
JP |
|
|
Family ID: |
45893223 |
Appl. No.: |
15/477501 |
Filed: |
April 3, 2017 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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13877031 |
Mar 29, 2013 |
9645599 |
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PCT/JP2011/072523 |
Sep 30, 2011 |
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15477501 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
Y04S 20/222 20130101;
G06F 1/26 20130101; Y02P 90/02 20151101; G05B 19/18 20130101; Y02P
70/10 20151101; Y02B 70/3225 20130101; G05B 2219/34306 20130101;
G05B 15/02 20130101; G05B 2219/32021 20130101; G05B 2219/34315
20130101; H02J 3/14 20130101; G06F 1/3203 20130101; G05F 5/00
20130101; Y02P 80/10 20151101 |
International
Class: |
G06F 1/32 20060101
G06F001/32; G06F 1/26 20060101 G06F001/26; H02J 3/14 20060101
H02J003/14; G05B 19/18 20060101 G05B019/18 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 1, 2010 |
JP |
2010-223658 |
Claims
1-9. (canceled)
10. A power-supply management device, comprising: a
power-supply-connecting/disconnecting section configured to
connect/disconnect power supply to a plurality of electric-powered
sections of a machine tool, the plurality of electric-powered
sections operating in processing of a material held by the machine
tool, wherein the power-supply connecting/disconnecting section is
configured to disconnect power supply to each of the
electric-powered sections during interruption or preparation of the
processing of the material, and restart the power supply to each of
the electric-powered sections at start or restart of the
processing.
11. A power-supply management device, comprising: a
power-supply-connecting/disconnecting section configured to
connect/disconnect power supply to a plurality of electric-powered
sections of a machine tool, the plurality of electric-powered
sections operating in processing of a material held by the machine
tool, wherein the power-supply connecting/disconnecting section is
configured to disconnect power supply to each of the
electric-powered sections during drawing up or editing of a
processing control program for processing the material, and restart
the power supply to each of the electric-powered sections at start
or restart of the processing after the drawing up or the editing of
the processing control program is completed.
12. A machine tool comprising: a plurality of electric-powered
sections operating in processing of a material; and a power-supply
management device configured to connect/disconnect power supply to
the plurality of electric-powered sections, wherein the
power-supply management device according to claim 10 is used for
the power-supply management device.
13. A machine tool comprising: a plurality of electric-powered
sections operating in processing of a material; and a power-supply
management device configured to connect/disconnect power supply to
the plurality of electric-powered sections, wherein the
power-supply management device according to claim 11 is used for
the power-supply management device.
Description
TECHNICAL FIELD
[0001] The present invention relates to a power-supply management
device and a machine tool having the power-supply management
device.
BACKGROUND ART
[0002] A machine tool (multisystem machine tool) including a
plurality of electric-powered sections for use in processing of a
material, a controller which controls the operation of each
electric-powered section, and a
power-supply-connecting/disconnecting section which turns on/off
each electric-powered section is known as a conventional machine
tool (refer to, for example, Patent Document 1).
[0003] The controller of the machine tool described in Patent
Document 1 includes a plurality of control systems. Each
electric-powered section is connected to each control system. Each
control system of the controller controls each electric-powered
section based on a predetermined program. Each electric-powered
section operates based on the control of the controller, so as to
perform a predetermined operation. The
power-supply-connecting/disconnecting section connects/disconnects
power supply to a predetermined electric-powered section.
RELATED ART DOCUMENT
Patent Document
[0004] Patent Document 1: JP 3435229B
SUMMARY OF INVENTION
Technical Problem
[0005] However, in the machine tool described in Patent Document 1,
the power supply is disconnected only to an electric-powered
section (main shaft and tool post) in which an abnormality is
determined by an abnormality determination section.
[0006] For this reason, an operator's setting is required for
disconnecting the power supply to an electric-powered section which
does not perform processing during a processing operation.
[0007] It is not easy for the machine tool described in Patent
Document 1 to perform processing while disconnecting the power
supply to each electric-powered section as appropriate, resulting
in energy being wasted. A power-supply management device which can
effectively connect/disconnect power supply to an electric-powered
section is therefore requested.
[0008] The present invention has been made in view of the above
conventional problem, and an object of the present invention is to
provide a power-supply management device which can effectively
connect/disconnect power supply to an electric-powered section, and
a machine tool having the power-supply management device.
Solution to Problem
[0009] A power-supply management device of the present invention,
which solves the above problem, includes a
power-supply-connecting/disconnecting section configured to
connect/disconnect power supply to a plurality of electric-powered
sections operating in processing of a material, and a comparator
configured to compare an operation state of each electric-powered
section during the processing of the material, and detect an
electric-powered section which does not require operation, wherein
the power-supply connecting/disconnecting section is configured to
disconnect the power supply to the electric-powered section which
does not require the operation during the processing based on
information from the comparator.
[0010] Preferably, the power-supply-connecting/disconnecting
section is configured to disconnect the power supply to each of the
electric-powered sections during the interruption or the
preparation of the processing of the material, and restart the
power supply to each of the electric-powered sections at the start
of the processing or the restart of the processing.
[0011] Preferably, the power-supply-connecting/disconnecting
section is configured to restart the power supply to a
power-supply-disconnected electric-powered section at the end of
the operation of the electric-powered section during the
operation.
[0012] Preferably, the comparator is configured to compare the
operation state between synchronizations of each of the
electric-powered sections, and detect the electric-powered section
which does not require the operation when each of the
electric-powered sections operates before and after the
synchronization.
[0013] Preferably, the comparator is configured to compare the
operation time of each of the electric-powered sections between the
synchronizations, and determine an electric-powered section except
an electric-powered section having the maximum operation time
between the synchronizations as an electric-powered section which
does not require the operation, and the
power-supply-connecting/disconnecting section is configured to
disconnect the power supply to the electric-powered section which
does not require the operation after the end of the operation
between the synchronizations.
[0014] Preferably, the comparator is configured to compare the
operation time of each of the electric-powered sections between the
synchronizations, and determine the electric-powered section having
no operation time between the synchronizations as the
electric-powered section which does not require the operation.
[0015] Preferably, when a program controlling each of the
electric-powered sections has a plurality of synchronization
commands for synchronizing each of the electric-powered sections,
the comparator is configured to detect a plurality of
synchronization commands, and detect or calculate the operation
time of each of the electric-powered sections between the
synchronization commands, and set the operation time as the
operation time of each of the electric-powered sections between the
synchronizations.
[0016] Preferably, the power-supply-connecting/disconnecting
section is configured to restart the power supply to the
power-supply-disconnected electric-powered section at the
synchronization of each of the electric-powered sections.
[0017] A machine tool of the present invention includes a plurality
of electric-powered sections operating in processing of a material,
and a power-supply management device configured to
connect/disconnect power supply to the plurality of
electric-powered sections, wherein the power-supply management
device uses the power-supply management device of the present
invention.
Effect of Invention
[0018] In the present invention, the power supply to the
electric-powered section which does not require the operation by
comparing the operation state of each of the electric-powered
sections during the processing is disconnected. The present
invention therefore does not require an operator's setting for
disconnecting the power supply, so that the power supply to the
electric-powered section can be effectively disconnected. Since the
power supply to the electric-powered section can be effectively
disconnected in the present invention, energy wastage can be
controlled.
[0019] In the present invention, the power supply to each of the
electric-powered sections is disconnected during the preparation of
the processing, and the power supply is restarted to each of the
electric-powered sections at the start of the processing, so that
an operator's setting is not required during the preparation of the
processing and at the start of the processing. In the present
embodiment, the power supply to each of the electric-powered
sections is disconnected during the interruption of the processing,
and the power supply is restarted to each of the electric-powered
sections at the restart of the processing, so that operator's
setting is not required during the interruption of the processing
and the restart of the processing. Therefore, the power supply to
the electric-powered section can be effectively disconnected in the
present invention. As a result, energy wastage can be
controlled.
[0020] In the present invention, the power supply is restarted to
the power-supply-disconnected electric-powered section at the end
of the operation of the electric-powered section during the
operation, so that an operator's setting is not required for
restarting the power supply. Therefore, the power supply to the
electric-powered section can be effectively disconnected. As a
result, the energy wastage can be further controlled.
[0021] In the present invention, when each of the electric-powered
sections operates before and after the synchronization, the power
supply is restarted to the power-supply-disconnected
electric-powered section at the synchronization, so that the
processing operation can be smoothly performed without disturbing
the execution of the processing operation after the
synchronization.
[0022] In the present invention, since the operation state can be
easily recognized by comparing the operation time of each of the
electric-powered sections between the synchronizations when
comparing the operation state between the synchronizations of each
of the electric-powered sections, the power supply can be easily
disconnected.
[0023] In the present invention, since the operation time of each
of the electric-powered sections can be easily recognized and
compared by using the synchronization command described in the
program controlling each of the electric-powered sections when
comparing the operation times between the synchronizations, the
power supply can be further easily disconnected.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 is a schematic perspective view illustrating an
automatic lathe as a machine tool of one embodiment of the present
invention.
[0025] FIG. 2 is a view illustrating a part of a processing control
program when processing a material in the automatic lathe of the
embodiment.
[0026] FIG. 3 is a view illustrating a relationship between a
controller and electric-powered sections of the automatic lathe of
the embodiment.
DESCRIPTION OF EMBODIMENT
[0027] FIG. 1 is a schematic perspective view illustrating an
automatic lathe 1 as a machine tool of one embodiment of the
present invention. This automatic lathe 1 includes a bed 2 in which
a main shaft and a tool post are provided. A first main shaft 3 and
a second main shaft 4 are mounted on the bed 2 to face each other.
A first tool post 6 and a second tool post 7 are provided in a
position facing the first main shaft 3. A third tool post 8 is
provided in a position facing the second main shaft 4.
[0028] The first main shaft 3 is supported to be movable in the
rotary drive direction and the axis line direction (Z1 axis
direction). The first tool post 6 is attached to be movable in the
X1 axis direction orthogonal to the direction horizontal to the top
surface of the bed 2 relative to the Z1 axis direction and the Y1
axis direction orthogonal to the direction vertical to the top
surface of the bed 2 relative to the Z1 axis direction. In
addition, the X1 axis direction and the Y1 axis direction are
orthogonal to each other. The second tool post 7 is attached to be
movable in the X2 axis direction, which is the same as the Xl axis
direction, the Y2 axis direction, which is the same as the Y1 axis
direction, and the Z2 axis direction, which is the same as the Z1
axis direction.
[0029] The second main shaft 4 is supported to be movable in the
rotary drive direction and the axis line direction (Z3 axis
direction) and the X3 axis direction orthogonal to the horizontal
direction relative to the Z3 axis direction. The Z3 axis direction
is the same as the Z1 axis and Z2 axis directions. The X3 axis
direction is the same as the X1 axis and X2 axis directions.
[0030] A Z1 axis motor 9 (refer to FIG. 3), which moves the first
main shaft 3 in the Z1 axis direction, is provided on the first
main shaft 3 side. An X1 axis motor 11 which moves the first tool
post 6 in the X1 axis direction is provided on the first tool post
6 side. A Y1 axis motor 12 which moves the first tool post 6 in the
Y1 axis direction is provided on the first tool post 6 side.
[0031] An X2 axis motor 13 (refer to FIG. 3) which moves the second
tool post 7 in the X2 axis direction is provided on the second tool
post 7 side. A Y2 axis motor 14 which moves the second tool post 7
in the Y2 axis direction and a Z2 axis motor 16 which moves the
second tool post 7 in the Z2 axis direction are provided on the
second tool post 7 side.
[0032] An X3 axis motor 17 which moves the second main shaft 4 in
the X3 axis direction is provided on the second main shaft 4 side.
A Z3 axis motor 18 which moves the second main shaft 4 in the Z3
axis direction is provided on the second main shaft 4 side.
[0033] Each motor 9, 11-14, 16-18 is driven by each motor driver
9a, 11a-14a, 16a-18a (refer to FIG. 3) provided in an electric box
19 mounted on the bed 2 side. Each motor 9, 11-14, 16-18 and each
motor driver 9a, 11a-14a, 16a-18a constitute an electric-powered
section which can operate by power supply.
[0034] The automatic lathe 1 includes a controller 21 which
controls rotation and movement of both main shafts 3, 4 and the
movement of each tool post 6-8, for example.
[0035] The controller 21 is a computer numerical controller (CNC).
As illustrated in FIG. 3, the controller 21 includes a processing
control program 26 and control section 27. The control contents of
the operations of the main shafts 3, 4 and the tool posts 6-8 which
operate by the motors 9, 11-14, 16-18, respectively, are described
in the processing control program 26. The control section 27 drives
each of the motors 9, 11-14, 16-18 through each of the motor
drivers 9a, 11a-14a, 16a-18a based on the processing control
program 26, and controls the operations of the main shafts 3, 4 and
tool posts 6-8. A part of a motor and a part of a motor driver are
only illustrated in FIG. 3.
[0036] The control section 27 includes three control systems (first
control system $1, second control system $2, third control system
$3). The processing control program 26 includes a control program
22 for the first control system $1, a control program 23 for the
second control system $2, and a control program 24 for the third
control program $3 as illustrated in FIG. 2.
[0037] The controller 21 controls, for example, the rotation and
movement of both shafts 3, 4 and the movement of the tool posts 6,
7 with respect to each of the control systems $1, $2, $3 based on
each of the control programs 22-24. The specific description will
be given as follows.
[0038] An axis as each control target belongs to each control
system $1, $2, $3. For example, the X1 axis, Y1 axis, and Z1 axis
belong to the first control system $1. The first control system $1
controls each of the Z1 axis motor 9, X1 axis motor 11, and Y1 axis
motor 12 through each of the motor drivers 9a, 11a, 12a
corresponding to each of the X1 axis, Y1 axis, and Z1 axis. The
control contents of the X1 axis, Y1 axis, and Z1 axis which belong
to the first control system $1 are described in the control program
22 for the first control system $1.
[0039] The first control system $1 controls the driving of each of
the Z1 axis motor 9, X1 axis motor 11, and Y1 axis motor 12 by
controlling the driving of each of the motor drivers 9a, 11a, 12a
based on the control program 22 for the first control system $1, so
as to control the movement of the first main shaft 3 in the Z1 axis
direction and the movement of the first tool post 6 in the X1 axis
and Y1 axis directions.
[0040] The X2 axis, Y2 axis, and Z2 axis belong to the second
control system $2. The second control system $2 controls each of
the X2 axis motor 13, Y2 axis motor 14, and Z2 axis motor 16
through each of the motor drivers 13a, 14a, 16a corresponding to
each of the X2 axis, Y2 axis, and Z2 axis. The control contents of
the X2 axis, Y2 axis, and Z2 axis which belong to the second
control system $2 are described in the control program 23 for the
second control system $2.
[0041] The second control system $2 controls the driving of each of
the X2 axis motor 13, Y2 axis motor 14, and Z2 axis motor 16 by
controlling the driving of each of the motor drivers 13a, 14a, 16a
based on the control program 23 for the second control system $2,
so as to control the movement of the second tool post 7 in the X2
axis direction, Y2 axis direction, and Z2 axis direction.
[0042] The X3 axis and Z3 axis belong to the third control system
$3. The third control system $3 controls each of the X3 axis motor
17 and Z3 axis motor 18 through each of the motor drivers 17a, 18a
corresponding to each of X3 axis and Z3 axis. The control contents
of the X3 axis and Z3 axis which belong to the third control system
are described in the control program 24 for the third control
system $3.
[0043] The third control system $3 controls the driving of each of
the X3 axis motor 17 and Z3 axis motor 18 by controlling the
driving of each of the motor drivers 17a, 18a based on the control
program 24 for the third control system $3, so as to control the
movement of the second main shaft 4 in the X3 axis and Z3 axis
directions.
[0044] In the automatic lathe 1 of the above-described embodiment,
both main shafts 3, 4 and the tool posts 6, 7 are controlled by the
controller 21. Both main shafts 3, 4 thereby hold a material. The
automatic lathe 1 processes the material held in both main shafts
3, 4 into a predetermined shape by a processing tool mounted on
each of tool posts 6, 7, 8.
[0045] The controller 21 includes a
power-supply-connecting/disconnecting section 28 connected to the
control section 27, a processing state comparator 31 connected to
the power-supply-connecting/disconnecting section 28 and a
synchronization command detector 29 connected to the processing
state comparator 31. In the present embodiment, the power-supply
management device 101 includes the
power-supply-connecting/disconnecting section 28, processing state
comparator 31, and synchronization command detector 29. The
processing state comparator 31 and the synchronization command
detector 29 constitute a comparator of the present invention.
[0046] Before describing the contents of the power-supply
management device 101, a synchronization command will be described.
Each of the control programs 22-24 for each of the control systems
$1-$3 includes the synchronization command. This synchronization
command is for synchronizing the various controls of each of the
control systems $1-$3 at the start of the operation, a
predetermined time during the operation and the end of the
operation (aligning start and end of various control operations).
Each of the control systems $1-$3 can perform the various
operations (various processing operations) in relation to each
other by the synchronization command.
[0047] As indicated in the processing control program 26 of FIG. 2,
for example, the synchronization command is configured such that an
identifier of a synchronization command is indicated in numbers
following L, and a control system as a target for synchronization
is indicated in a system number following "!".
[0048] The synchronization command "!2 !3 L1" described in the
control program 22 of the first control system $1 means that the
second and third control systems $2, $3 are the synchronization
targets relative to the first control system $1.
[0049] The synchronization command "!1 !3 L1" for synchronizing the
first and third control systems $1, $3 is described in the control
program 23 of the second control system $2. The synchronization
command "!1 !2 L1" for synchronizing the first and second control
systems $1, $2 is described in the control program 24 of the third
control system $3.
[0050] The synchronization command detector 29 searches "!" in the
control programs 22-24 of the control systems $1-$3.
[0051] The processing state comparator 31 compares the operation
state of each control system $1-$3 which is the synchronization
target based on the synchronization command detected by the
synchronization command detector 29.
[0052] The processing state comparator 31 previously analyzes the
processing control program 26, and detects the synchronization
command having the same identifier in all of the control systems
$1-$3. Then, the processing state comparator 31 detects or
calculates the execution time of the processing operation
(operation time of electric-powered section) which is performed
between the detected synchronization command and the last
synchronization command before the detected synchronization command
with respect to each of the control systems $1-$3, compares the
detected or calculated execution times, and commands to the
power-supply-connecting/disconnection section 28 so as to
disconnect the power supply to a control system except a control
system having the maximum execution time.
[0053] The power-supply-connecting/disconnecting section 28
connects/disconnects the power supply to the motor and the motor
driver corresponding to the motor, which belong to the control
system instructed by the processing state comparator 31. More
specifically, the power-supply-connecting/disconnecting section 28
disconnects the motor and the motor driver after the end of the
control executed between the synchronization command detected by
the synchronization command detector 29 and the last
synchronization command before the detected synchronization
command. Then, the power-supply-connecting/disconnection section 28
restarts the power supply to the power-supply-disconnected motor
and motor driver at the end of the synchronization in each of the
control systems.
[0054] The processing state comparator 31 and the
power-supply-connecting/disconnecting section 28 regard the start
of each control program 22-24 as the last synchronization command
with respect to the synchronization command first-detected in each
control system $1-$3.
[0055] In the case of the processing control program 26 illustrated
in FIG. 2, the synchronization command of the identifier L1, the
synchronization command of the identifier L2 and the
synchronization command of the identifier L3 are detected in the
control programs 22-24 of the control systems $1-$3, respectively.
The synchronization command of the identifier L4 is detected in the
control program 23 of the second control system $2 and the control
program 24 of the third control system $3.
[0056] In the first control system $1, (G50 Z0) is executed as the
control (processing operation) from the start of the control
program 22 to the synchronization command (!2 !3 L1) of the
identifier L1. In the second and third control systems $2, $3, the
control is not performed from the start of the control programs 23,
24 to the synchronization commands (!1 !3 L1) (!1 !2 L1) of the
identifier L1.
[0057] The processing state comparator 31 therefore determines the
first control system $1 as the control system having the maximum
execution time from the start of the control programs 22-24 to the
synchronization command of the identifier L1. Thereby, the
processing state comparator 31 instructs to the
power-supply-connecting/disconnecting section 28 that the second
and third control systems $2, $3 are power-supply-disconnecting
systems. After receiving this instruction, the
power-supply-connecting/disconnecting section 28 disconnects the
power supply to the motors and the motor drivers belonging to the
second and third control systems $2, $3 from the start of the
control programs 23, 24 to the synchronization command of the
identifier L1.
[0058] Next, the power-supply-connecting/disconnecting section 28
restarts the power supply to the motors and the motor drivers
belonging to each of the second control system $2 and the third
control system $3 after the end of the control (G50 Z0) of the
first control system $1, when executing the synchronization command
(!2 !3 L1), or a predetermined time before the end of the control
(G50 Z0). In addition, since the control contents described in the
processing control program 26 are generally known, the detailed
description thereof will be omitted.
[0059] Next, in the first control system $1, from the
synchronization command of the identifier L1 (!2 !3 L1) to the
synchronization command of the identifier L2 (!2 !3 L2), (G99
M06-G00 X13.0 Z-0.5 T01) is executed as the control. In the second
and third control systems $2, $3, from the synchronization command
of the identifier L1 (!1 !3 L1), (!1 !2 L1) to the synchronization
command of the identifier L2 (!1 !3 L2), (!1 !2 L2), the control is
not performed.
[0060] The processing state comparator 31 therefore instructs to
the power-supply-connecting/disconnecting section 28 the second and
third control systems $2, $3 as the power source disconnecting
systems. After receiving this instruction, the
power-supply-connecting/disconnecting section 28 disconnects the
power supply to the motors and the motor drivers belonging to the
second and third control systems $2, $3 from the synchronization
command of the identifier L1 to the synchronization command of the
identifier L2.
[0061] Next, the power-supply-connecting/disconnecting section 28
restarts the supply of the power source to the motors and the motor
drivers belonging to the second and third control systems $2, $3
after the end of the control (G99 M06-G00 X13.0 Z-0.5 T01) of the
first control system $1, when executing the synchronization command
(!2 !3 L2) or a predetermined time before the end of the control of
the first control system $1.
[0062] Next, in the first control system $1, (G01 X6.0 F0.2-X8.0
Z0.5 Foo) is executed from the synchronization command of the
identifier L2 (!2 !3 L2) to the synchronization command of the
identifier L3 (!2 !3 L3) as the control.
[0063] In the second control system $2, (G00 Z-1.0-X-50.0) is
executed from the synchronization command of the identifier L2 (!1
!3 L2) to the synchronization command of the identifier L3 !3 L3)
as the control.
[0064] In the third control system $3, (G00 Z-1.0) is executed from
the synchronization command of the identifier L2 (!1 !2 L2) to the
synchronization command of the identifier L3 (!1 !2 L3) as the
control.
[0065] In this case, the processing state comparator 31 detects or
calculates the execution time of each control system $1-$3, and
determines that the execution time of the first control system $1
is the maximum. The processing state comparator 31 therefore
instructs to the power-supply-connecting/disconnecting section 28
that the power supply is not necessary for the second and third
control systems $2, $3 after the end of the control.
[0066] After receiving this instruction, the
power-supply-connecting/disconnecting section 28 disconnects the
power supply to the motors and the motor drivers belonging to the
second and third control systems $2, $3 until the synchronization
command of the identifier L3 after the end of the control.
[0067] Next, the power-supply connecting/disconnecting section 28
restarts the power supply to the motors and the motor drivers
belonging to the second and third control systems $1, $3 after the
end of the control of the first control system $1, when executing
the synchronization command (!2 !3 L2), or a predetermined time
before the end of the control of the first control system $1.
[0068] As described above, in the automatic lathe 1 (power-supply
management device 101) of the present embodiment, when the
synchronization command of the processing control program 26 is
detected, the power supply to the motor and the motor driver
belonging to the control system except the control system having
the maximum execution time between the detected synchronization
command and the last synchronization command before the detected
synchronization command in the control systems as the
synchronization targets is disconnected after the end of the
operation between the detected synchronization command and the last
synchronization command before the detected synchronization
command. Then, the power-supply management device 101 restarts the
power supply at the end of the synchronization in each of the
control systems.
[0069] Accordingly, the automatic lathe 1 of the present embodiment
effectively connects/disconnects the power supply to the
electric-powered section because it does not require an operator's
setting for disconnecting and restarting the power supply to the
electric-powered section. The automatic lathe 1 of the present
embodiment can effectively connect/disconnect the power supply to
the electric-powered section, so that energy wastage can be
controlled.
[0070] In addition, in the automatic lathe 1 of the present
embodiment, when each motor and each motor driver operate before
and after the synchronization, the power supply to the
electric-powered section to which the power supply is disconnected
before the synchronization is restarted at the time of
synchronization. The processing operation can be therefore smoothly
performed without disturbing the execution of the processing
operation after the synchronization.
[0071] In the automatic lathe 1 of the present embodiment, the
operation times between the synchronizations are compared when
comparing the operation states of each motor and each motor driver
between the synchronizations. In this way, the operation state
between the synchronizations can be easily recognized, so that the
power supply can be easily disconnected.
[0072] In the automatic lathe 1 of the present embodiment, when
comparing the operation times between the synchronizations, the
synchronization command described in the processing control program
26 controlling each electric-powered section is used. Consequently,
the operation times between the synchronizations can be easily
recognized, and compared, so that the power supply can be further
easily disconnected.
[0073] When disconnecting the power supply to the motor and the
motor driver, the control of the motor or the like by the
controller 21 can be normally continued by a normal disconnecting
flag provided for discriminating from a problem in a motor and a
motor driver or the like.
[0074] The power-supply-connecting/disconnecting section 28 can set
in the process control program 26 a motor and a motor driver to
which the disconnection of power supply is controlled among the
motors and the motor drivers belonging to the control systems
$1-$3. In this case, the power supply to the motor and the motor
driver to which the disconnection of the power supply in processing
or the like becomes a problem can be continued. The rotation of a
motor which rotates a rotation tool such as the main shafts 3, 4,
drill, or tap can be continued as appropriate. Moreover, an
operation unit (for example, setting screen) for setting the motor
and the motor driver to which the disconnection of the power supply
is controlled can be provided in the automatic lathe 1.
[0075] In the processing control program 26 of FIG. 2, in the
second control system $2, (G01 Z4.0 Foo T27-G00 Z-1.0 T00) is
executed as the control from the synchronization command of the
identifier L3 (!1 !3 L2) to the synchronization command of the
identifier L4 (!3 L4).
[0076] In the third control system $3, (G01 Z4.0 Foo T27-G00 Z-1.0
T00) is executed as the control from the synchronization command of
the identifier L3 (!1 !2 L3) to the synchronization command of the
identifier L4 (!2 L4).
[0077] In this case, the control is simultaneously completed in
both control systems $2, $3. When the control in each control
system is simultaneously completed, the power supply can be
connected/disconnected to the motor and the motor driver without
instructing to the power-supply-connecting/disconnecting section 28
the disconnection of the power supply to any of the control
systems.
[0078] The processing state comparator 31 can be configured as
follows when detecting the synchronization command. The processing
state comparator 31 checks a block (program line) during the
execution of the control program of the control system which is the
synchronization target. As a result, when there is a control system
in which the synchronization command corresponding to the detected
synchronization command has not been executed yet, the control
system in which the synchronization command is detected is
instructed to the power-supply-connecting/disconnecting section 28
as a power-supply disconnecting system. When the synchronization
command corresponding to the detected synchronization command has
already been executed in each control system, the control system
which is the synchronization target is instructed to the
power-supply-connecting/disconnecting section 28 as the
power-supply restart system.
[0079] After receiving the instruction of the
power-supply-disconnecting system, the
power-supply-connecting/disconnecting section 28 disconnects the
power supply to the motor and the motor driver belonging to the
power-supply-disconnecting system. After receiving the instruction
of the power-supply restart system, the
power-supply-connecting/disconnecting section 28 restarts the power
supply to the motor and the motor driver belonging to the
power-supply restart system.
[0080] In the case of sequentially executing each control program,
when the synchronization command is detected, the power supply to
the motor and the motor driver belonging to the control system
except the control system in which the execution time between the
detected synchronization command and the last synchronization
command before the detected synchronization command is the maximum
in the respective control systems which are the synchronization
targets is disconnected after the end of the control between the
detected synchronization command and the last synchronization
command before the detected synchronization command. Then, at the
end of the synchronization, in each control system, the power
supply is restarted to the power-supply-disconnected motor and the
motor driver.
[0081] For this reason, the processing of the material can be
performed while automatically connecting/disconnecting the power
supply to a predetermined motor and a predetermined motor driver
which become a standby state during the processing operation of the
material without previously analyzing the processing control
program 26 (control program 22-24 for each control system $1-$3).
The energy consumption of the automatic lathe 1 can be thereby
reduced.
[0082] When providing a program editing function which can draw up
and edit the processing control program 26 (each control program)
in the controller 21, the power-supply-connecting/disconnecting
section 28 can be configured to disconnect the power supply to all
of the motors and the motor drivers when editing the processing
control program 26.
[0083] The main shaft and the tool post positioned by the motor and
the motor driver may displace when the power supply is disconnected
by the power-supply-connecting/disconnecting section 28.
[0084] The controller 21 can be constituted as follows relative to
the above case. The controller 21 previously stores the positions
of the main shaft and the tool post when disconnecting the power
supply. Next, the controller 21 calculates the difference between
the position in the restart and the position in the disconnection
at the restart of the power supply, and the main shaft and the tool
post are set back to the original positions (positions when
disconnecting power supply) by driving a motor based on this
difference. With this configuration, the positional displacement of
the main shaft and the tool post generating along the disconnection
of the power supply can be prevented, and a decrease in the
processing accuracy can be avoided.
[0085] When it is considered that the main shaft and the tool post
are moved in an unsafe area by the displacement of the main shaft
and the tool post, the communication between a motor detector or an
external detector, which detects the positions of the main shaft
and the tool post (rotation position of motor shaft), and the
controller 21 side can be always continued. When detecting the
movement to the unsafe area, the
power-supply-connecting/disconnecting section 28 restarts the power
supply to the motor and the motor driver, so that the positions of
the main shaft and the tool post are controlled so as not to move
to the unsafe area or so as to escape from the unsafe area.
[0086] When setting the main shaft and the tool post back to the
original positions (position when disconnecting power supply), the
controller 21 can calculate a next power-on time of the
power-supply-disconnected motor and the motor driver by calculating
the execution time of each block after the next block of the
synchronization command which determines the disconnection of the
power supply.
[0087] In this case, the controller 21 calculates the total time of
the operation recovery time until the motor and the motor driver
normally operate after the restart of the power supply and the time
(return position movement time) which sets the main shaft and the
tool post back to the original positions. The
power-supply-connecting/disconnecting section 28 can disconnect the
power supply to the motor and the motor driver when the next
power-on time is long (slow) from the total time.
[0088] After the restart of the power supply to the motor and the
motor driver, the control of the processing operation (next command
execution) can be restarted after the passage of the total time of
the operation recovery time and the return position movement time,
or by receiving the recovery end signal from the motor driver.
After the restart of the power supply, time loss may occur until
the control of the processing operation is restarted. Therefore,
the power supply can be restarted before the total time of the
operation recovery time and the return position movement time by
the execution of the next block (program line) after the
synchronization command.
[0089] The restart of the power supply includes the following in
addition to the automatic restart by the
power-supply-connecting/disconnecting section 28 based on the
processing control program 26. The instruction of the power supply
is described in each of the control programs 22-24 for each of the
control systems $1-$3 in the processing control program 26.
Moreover, another energy management program different from the
control program for each of the control systems $1-$3 is prepared,
and the connection/disconnection of the power supply to the motor
and the motor driver is controlled based on the energy management
program.
[0090] The power-supply management device 101 can disconnect and
restart the power supply to the motor and the motor driver
unrelated to material change or product recovery based on the
instruction of the material change or the instruction of the
recovery of the processed product in addition to the control of the
power supply to the motor and the motor driver based on the
synchronization command. A mode (energy saving mode) which controls
the power supply to the motor and the motor driver and a mode
(normal drive mode) which does not control the power supply to the
motor and the motor driver can be provided in the controller 21,
and the modes can be switched.
[0091] The control section 27 of the controller 21, power-source
connecting/disconnecting section 28, synchronization command
detector 29, processing state comparator 31 and the like are
operated by software or hardware in accordance with a program
previously stored in the controller 21, hardware previously
provided in the controller 21 or the like.
[0092] Although the embodiment of the present disclosure has been
described above, the present disclosure is not limited thereto. It
should be appreciated that variations may be made in the embodiment
described by persons skilled in the art without departing from the
scope of the present disclosure.
CROSS-REFERENCE TO RELATED APPLICATION
[0093] The present application is based on and claims priority from
Japanese Patent Application No. 2010-223658, filed on Oct. 1, 2010,
the disclosure of which is hereby incorporated by reference in its
entirety.
DESCRIPTION OF REFERENCE NUMERAL
[0094] 1 Automatic lathe (machine tool)
[0095] 9, 11-14, 16-18 Motor (electric-powered section)
[0096] 9a, 11a-14a, 16a-18a Motor driver (electric-powered
section)
[0097] 21 Controller
[0098] 22 Control program for first control system
[0099] 23 Control program for second control system
[0100] 24 Control program for third control system
[0101] 28 Power-supply-connecting/disconnecting section
[0102] 26 Processing control program
[0103] 29 Synchronization command detector (comparator)
[0104] 31 Processing state comparator (comparator)
[0105] 101 Power-supply management device
* * * * *