U.S. patent application number 17/481241 was filed with the patent office on 2022-01-06 for side punching mechanism with movable guide block.
The applicant listed for this patent is SUZHOU UIGREEN MICRO&NANO TECHNOLOGY CO. LTD.. Invention is credited to Jie LI, Xingshun LUO, Xiaochen QIAN, Yong YANG.
Application Number | 20220001437 17/481241 |
Document ID | / |
Family ID | 1000005916766 |
Filed Date | 2022-01-06 |
United States Patent
Application |
20220001437 |
Kind Code |
A1 |
QIAN; Xiaochen ; et
al. |
January 6, 2022 |
SIDE PUNCHING MECHANISM WITH MOVABLE GUIDE BLOCK
Abstract
A side punching mechanism with a movable guide block includes a
slider base disposed in a lower die. A slider is disposed on the
slider base, a side punching pin is disposed at a front end of the
slider, a movable guide block connected to the slider base in a
sliding fit manner is disposed in front of the slider, the movable
guide block includes a concave movable base and a boss disposed on
the movable base, a front end of the boss protrudes forwards and
extends out from the movable base, the front end of the boss has a
shape of an indented arc, the boss is disposed at the center of the
movable base, a through-hole is formed in the boss, and the slider
slides on the slider base along a concave space of the movable base
to drive the side punching pin to move in the through-hole.
Inventors: |
QIAN; Xiaochen; (Suzhou,
CN) ; LUO; Xingshun; (Suzhou, CN) ; YANG;
Yong; (Suzhou, CN) ; LI; Jie; (Suzhou,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SUZHOU UIGREEN MICRO&NANO TECHNOLOGY CO. LTD. |
Suzhou |
|
CN |
|
|
Family ID: |
1000005916766 |
Appl. No.: |
17/481241 |
Filed: |
September 21, 2021 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/CN2020/110250 |
Aug 20, 2020 |
|
|
|
17481241 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B21D 37/12 20130101;
B21D 28/34 20130101; B21D 28/28 20130101 |
International
Class: |
B21D 28/34 20060101
B21D028/34; B21D 28/28 20060101 B21D028/28; B21D 37/12 20060101
B21D037/12 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 17, 2019 |
CN |
201911299300.3 |
Claims
1. A side punching mechanism with a movable guide block, comprising
a slider base disposed in a lower die, wherein a slider is disposed
on the slider base, a side punching pin is disposed at a front end
of the slider, a movable guide block connected to the slider base
in a sliding fit manner is disposed in front of the slider, the
movable guide block comprises a concave movable base and a boss
disposed on the movable base, a front end of the boss protrudes
forwards and extends out from the movable base, the front end of
the boss has a shape of an indented arc, the indented arc fits with
an outer-surface arc of the product, the boss is disposed at the
center of the movable base, a through-hole for the side punching
pin to enter is formed in the boss, the slider slides on the slider
base along a concave space of the movable base to drive the side
punching pin to move in the through-hole, the movable base
comprises two L-shaped bent side wings disposed at the bottom of
the boss, and the side wings each are bent into an L shape towards
the slider to enclose the concave space.
2. The side punching mechanism with a movable guide block according
to claim 1, wherein an inclined face is disposed at a rear end of
the movable base.
3. The side punching mechanism with a movable guide block according
to claim 1, wherein a return through-hole is formed in the movable
base, a spring is disposed in the return through-hole, one end of
the spring abuts against a cutting edge, the end abutting against
the cutting edge of the spring is positioned below a flange of the
product, and the other end of the spring is disposed in the slider
and configured to coordinate in returning the slider.
4. The side punching mechanism with a movable guide block according
to claim 3, wherein the return through-hole is positioned under the
boss.
5. The side punching mechanism with a movable guide block according
to claim 2, wherein the inclined face of the movable base is mated
with an inclined face of a side-push inclined punch fixed to a
floating plate, and the side-push inclined punch is disposed in an
inner/outer splitting manner and comprises an inner-side-push
inclined punch and an outer-side-push inclined punch wrapping
around the inner-side-push inclined punch.
6. The side punching mechanism with a movable guide block according
to claim 5, wherein an inclined face of the outer-side-push
inclined punch is mated with the inclined face of the movable
base.
7. The side punching mechanism with a movable guide block according
to claim 6, wherein an inclined face of the inner-side-push
inclined punch is mated with an inclined face of the slider.
8. The side punching mechanism with a movable guide block according
to claim 1, wherein a distance by which the boss extends out from
the movable base is greater than a width of the flange of the
product.
9. The side punching mechanism with a movable guide block according
to claim 1, wherein a counterbore is formed in each of the side
wings, and a linear spring is disposed in the counterbore.
Description
TECHNICAL FIELD
[0001] The present invention relates to the technical field of die
machining, and in particular, relates to a side punching mechanism
with a movable guide block for a product with a relatively small
side hole and a few flanges at an opening.
BACKGROUND
[0002] For a deep drawing product with a side hole produced on a
multi-station deep drawing press, especially a product with a small
hole in a side wall and a few flanges at an opening, the side hole
of such a product is usually formed by using a side punching
mechanism shown in FIG. 1. A cutting edge 1 is fixed to the middle
of a lower fixing plate. A product 4 is pressed into the cutting
edge 1 by an upper ejector rod for product positioning. A slider is
fitted into a spring and then mounted into a slider base 2 to reach
a sliding fit state. A punching pin guide block 21 is fixed in a
dovetail groove of the slider base in a close fit manner. A
punching pin 3 is fixed in the slider. The punching pin guide block
21 guides a punching pin head. During die closing, a slider-pushing
punch descends along with a floating plate and reaches contact with
an inclined face of the slider, to drive the punching pin 3 to move
forward and enter the cutting edge 1 for side punching.
[0003] However, as the product has a few flanges 41 at the opening,
to avoid the flanges 41 of the product from interfering with the
guide block 21, the guide block 21 must keep a certain distance
from an outer edge of the flanges 41 to give room for smoothly
ejecting out the product and allowing the product to enter a lower
die. In other words, when the punching pin 3 punches a hole, the
punching pin head is suspended and loosened. In addition, as the
product has a small side hole, the punching pin head is easily
broken in case of no protection. Moreover, the product cannot be
pressed from the outside due to its thin wall, and consequently the
product may be subject to flanging deformation at an edge of the
hole after punching.
SUMMARY
[0004] To overcome the defects in the prior art, the present
invention provides a side punching mechanism with a movable guide
block, which can protect a punching pin head and press an outer
part of a product to better perform side punching.
[0005] The objectives of the present invention are achieved by the
technical solutions below:
[0006] A side punching mechanism with a movable guide block
includes a slider base disposed in a lower die, where a slider is
disposed on the slider base, a side punching pin is disposed at a
front end of the slider, a movable guide block connected to the
slider base in a sliding fit manner is disposed in front of the
slider, the movable guide block includes a concave movable base and
a boss disposed on the movable base, a front end of the boss
protrudes forwards and extends out from the movable base, the front
end of the boss has a shape of an indented arc, the indented arc
fits with an outer-surface arc of a product, the boss is disposed
at the center of the movable base, a through-hole for the side
punching pin to enter is formed in the boss, the slider slides on
the slider base along a concave space of the movable base to drive
the side punching pin to move in the through-hole.
[0007] Preferably, the movable base includes two L-shaped bent side
wings disposed at the bottom of the boss, and the side wings each
are bent into an L shape towards the slider to enclose the concave
space.
[0008] Preferably, an inclined face is disposed at a rear end of
the movable base.
[0009] Preferably, a return through-hole is formed in the movable
base, a spring is disposed in the return through-hole, one end of
the spring abuts against a cutting edge, the end abutting against
the cutting edge of the spring is positioned below a flange of the
product, and the other end of the spring is disposed in the slider
and configured to coordinate in returning the slider.
[0010] Preferably, the return through-hole is positioned under the
boss.
[0011] Preferably, the inclined face of the movable base is mated
with an inclined face of a side-push inclined punch fixed to a
floating plate, and the side-push inclined punch is disposed in an
inner/outer splitting manner and includes an inner-side-push
inclined punch and an outer-side-push inclined punch wrapping
around the inner-side-push inclined punch.
[0012] Preferably, an inclined face of the outer-side-push inclined
punch is mated with the inclined face of the movable base.
[0013] Preferably, an inclined face of the inner-side-push inclined
punch is mated with an inclined face of the slider.
[0014] Preferably, a distance by which the boss extends out from
the movable base is greater than a width of the flange of the
product.
[0015] Preferably, a counterbore is formed in each of the side
wings, and a linear spring is disposed in the counterbore.
[0016] The present invention has the following beneficial effects:
With a protection section provided for a punching pin head, the
punching strength and side punching stability of the punching pin
are improved. In addition, a part of a side wall of the product
around a small hole is pressed, and this can effectively mitigate
the defect of flanging deformation of the small hole in case of no
pressing.
BRIEF DESCRIPTION OF DRAWINGS
[0017] FIG. 1 is a schematic diagram of a side punching structure
according to the prior art of the present invention;
[0018] FIG. 2 is a schematic diagram of a structure according to
the present invention;
[0019] FIG. 3 is a schematic diagram of a stereo structure
according to the present invention;
[0020] FIG. 4 is a schematic diagram of a stereo structure from
another perspective according to the present invention; and
[0021] FIG. 5 is a schematic diagram of a use structure in a die
according to the present invention.
DESCRIPTION OF EMBODIMENTS
[0022] The technical solutions of the present invention are
described in detail in combination with the embodiments below. The
present invention discloses a side punching mechanism with a
movable guide block. As illustrated in FIG. 2 and FIG. 3, the side
punching mechanism includes a slider base 14 disposed in a lower
die. A slider 13 is disposed on the slider base 14. A side punching
pin 12 is disposed at a front end of the slider 13. The side
punching pin 12 may be a splittype to better adapt to product
punching. During assembling, the side punching pin 12 may be
mounted into the slider from a rear end of the slider 13.
[0023] A movable guide block 15 is further disposed on the slider
base 14 in a sliding fit manner. The movable guide block 15 is
disposed in front of the slider 13. The movable guide block 15
includes a concave movable base 151 and a boss 152 disposed on the
movable base 151. A front end of the boss 152 protrudes forwards
and extends out from the movable base 151. The front end of the
boss 152 has a shape of an indented arc. The indented arc fits with
an outer-surface arc of a product 10. Therefore, when the product
10 is being punched, the front end of the boss 152 can press a
punching area of the product 10, to prevent the material from
flanging deformation during punching. In order not to affect the
placement of the product, a distance by which the boss 152 extends
out from the movable base 151 is greater than a width of a flange
of the product.
[0024] The boss 152 is disposed at the center of the movable base
151. The movable base 151 includes two L-shaped bent side wings
disposed at the bottom of the boss 152. The side wings each are
bent into an L shape towards the slider to enclose a concave space.
A through-hole for the side punching pin 12 to enter is formed in
the boss 152. The slider 13 slides on the slider base 14 along the
concave space of the movable base 151 to drive the side punching
pin 12 to move in the through-hole.
[0025] An inclined face is disposed on an upper portion of a rear
end of the movable base 151. A return through-hole 153 is formed in
the movable base 151. The return through-hole 153 is positioned
under the boss. A spring is disposed in the return through-hole
153. One end of the spring abuts against a cutting edge 9. In order
not to interfere with the flange of the product, the end abutting
against the cutting edge of the spring is positioned below the
flange of the product. The other end of the spring is disposed in
the slider 13 and configured to coordinate in returning the slider
13. In order to provide return force for the movable guide block
15, a counterbore 154 is formed in each of the side wings, and a
linear spring is disposed in the counterbore.
[0026] The inclined face of the movable base 151 is mated with an
inclined face of a side-push inclined punch 11 fixed to a floating
plate 4. The floating plate 4 is disposed on a lower die holder 2
through a floating bolt assembly 17. The side-push inclined punch
11 is disposed in an inner/outer splitting manner and includes an
inner-side-push inclined punch 111 and an outer-side-push inclined
punch 112 wrapping around the inner-side-push inclined punch 111.
An inclined face of the outer-side-push inclined punch 112 is mated
with the inclined face of the movable base. An inclined face of the
inner-side-push inclined punch 111 is mated with an inclined face
of the slider. The side-push inclined punch 11 is connected to the
floating plate 4, i.e., the side-push inclined punch 11 is pressed
and locked by a plug screw locked into a side face of the floating
plate 4.
[0027] The following describes the principles of the present
invention during actual use in a die with reference to FIG. 5.
[0028] The product 10 is fed into the cutting edge 9 through a
split feeding fixture 5. During die closing, an upper ejector rod 6
fixed to an upper fixing block 7 is used to press the top of the
product. The upper fixing block 7 is in contact with the floating
plate 4. The floating plate 4 drives the side-push inclined punch
11 to press down. The inclined face of the side-push inclined punch
11 is in contact with the inclined face of the slider 13 and that
of the movable guide block 15, so that the side-push inclined punch
11 pushes the slider 13 and the movable guide block 15 to move on
the slider base 14 towards the product 10. After the boss 152 is in
contact with the product, the product is limited to keep moving
forward under the action of the movable base 151. At this moment, a
to-be-punched position of the product 10 is pressed by an
arc-shaped front end face of the boss 152. The slider 13 continues
to move forward under the action of the side-push inclined punch
11, so as to drive the side punching pin 12 to pierce into the
product 10 for side punching.
[0029] During die opening, the floating plate 4 and the upper
fixing block 7 return to original positions, so as to drive the
side-push inclined punch 11 to ascend. The slider 13 and the
movable guide block 15 successively return to original positions
under the action of the spring until the movable guide block
completely recedes from the product. The punched product is ejected
out by a lower ejector rod 1 of the die.
[0030] The present invention is simple and compact in structure.
The two sliding parts move independently without interfering with
each other and do not affect the guiding-in and ejecting-out of the
product. An elastic-pressing effect of a progressive die is
implemented with the simple and practical structure, and the
quality of the product is improved.
[0031] In the description of the present disclosure, it should be
noted that the orientations or positional relationships indicated
by the terms "center", "upper", "lower", "left", "right",
"vertical", "horizontal", "inner", "outer", etc. are based on the
orientations or positional relationships shown in the accompanying
drawings and are merely for ease in describing the present
invention and simplifying this description, but not to indicate or
imply that an indicated device or element must have a particular
orientation and be constructed and operated in a particular
orientation, and thus they should not be construed as limitations
on the present invention.
[0032] Certainly, the present invention further includes many
specific implementations that are not enumerated herein. The
technical solutions formed by making equivalent replacements or
equivalent modifications all fall within the protection scope of
the claims of the present invention.
* * * * *