U.S. patent application number 10/473869 was filed with the patent office on 2004-06-24 for positioning and repositioning systems for fixing toolholders to the drums of milling machines.
Invention is credited to Risi, Mirco.
Application Number | 20040119326 10/473869 |
Document ID | / |
Family ID | 11439234 |
Filed Date | 2004-06-24 |
United States Patent
Application |
20040119326 |
Kind Code |
A1 |
Risi, Mirco |
June 24, 2004 |
Positioning and repositioning systems for fixing toolholders to the
drums of milling machines
Abstract
Improvements to the positioning and repositioning systems for
the fixing of toolholders (3) to the drums of milling machines. The
cylindrical shell of the drum (1) presents through slots (2) which
allow a reliable positioning of the toolholders (3) during the
removal operations. The toolholders (3) present congruent reference
element (4, 4', 4") that engage the through slots (2).
Inventors: |
Risi, Mirco; (Bologna,
IT) |
Correspondence
Address: |
DARA L ONOFRIO
ONOFRIO LAW
1133 BROADWAY
SUITE 1600
NEW YORK
NY
10010
US
|
Family ID: |
11439234 |
Appl. No.: |
10/473869 |
Filed: |
September 29, 2003 |
PCT Filed: |
February 7, 2002 |
PCT NO: |
PCT/IB02/00363 |
Current U.S.
Class: |
299/39.8 ;
299/106 |
Current CPC
Class: |
E21C 35/19 20130101;
E21C 35/188 20200501 |
Class at
Publication: |
299/039.8 ;
299/106 |
International
Class: |
E21C 025/00 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 30, 2001 |
IT |
BO2001A000189 |
Claims
1) Improvements to the positioning and repositioning systems for
the fixing of toolholders to the drums of milling machines,
characterized by the fact that the cylindrical shell of the drum
(1) presents through slots that remain free, ineffaceable and
always easy to locate even in case of total wear and disappearance
of prominent bases or of flat zones arranged on the drum for
placing toolholders (3).
2) Improvements to the positioning and repositioning systems for
the fixing of toolholders to the drums of milling machines, as in
claim 1, characterized by the fact that the through slots (2),
specially placed around the cylindrical surface of the drum (1),
are pre-oriented that is geometrically arranged to guarantee the
optimal lay-out for each toolholder (3), which is provided with
congruent reference element (4, 4', 4") that engage in such through
slots (2) before it is welded onto it oriented and distributed
position around the cylindrical surface of the drum (1).
3) Improvements to the positioning and repositioning systems for
the fixing of toolholders to the drums of milling machines, as in
previous claims, characterized by the fact that the reference
elements (4, 4', 4") for the placements of toolholders (3) can be
realized in thermolabile material, which melt, during the removal
operation with oxyhydrogen flame of the worn out residual
toolholders to be replaced, thus freeing the through slots (2) that
are always present onto the cylindrical shell of the drum (1).
Description
[0001] The present invention concerns the technology of milling
machines drums, especially systems to perform the positioning and
assure repositioning for the fixing of toolholders placed around
the cylindrical surface of the drums of milling machines.
International classification B21d, E21c.
STATE OF THE ART
[0002] It is known that the drums in milling machines are provided
with a number of toolholders specifically located and oriented in
different positions at different angles. The right positioning of
each toolholder requires the employment of complex gears for the
industrial production of milling machines' drums.
[0003] It is also known that both tools and toolholders are worn
out during the milling activity and the problem of replacing them
often occurs. During the removal activity of the toolholder with
oxyhydrogen flame often happens that even the references for
repositioning of the spare toolholder are effaced. In cases of
serious wear even the references consisting in prominent bases are
erased, and also the references made by a flat surface on the drum
in the position where the toolholder need to be fixed.
[0004] The problem to be solved is to preserve the specific
repositioning references to always guarantee the right positioning
of spare toolholders.
[0005] It should be pointed out that the replacement operations of
the toolholders are done manually, without sophisticated industrial
production tools.
[0006] The present invention suggests an improved system to solve
the above mentioned problems, and guarantees the possibility to
replace correctly the spare toolholders even in cases of serious
wear around the fixing zone on the drum that causes the
disappearance of references necessary to the positioning of spare
toolholders.
DESCRIPTION
[0007] The invention is now disclosed with reference to the figures
if the attached drawings as not limiting example.
[0008] FIG. 1 shows in perspective a milling machine industrial
drum provided with a plurality of toolholders especially placed and
welded upon the cylindrical surface of the drum. It can be noticed
that the toolholders have a specific angle that is obtained through
the employment of complex equipment for the automatic placement
operated by numeric control machines.
[0009] FIG. 2 shows a toolholder provided with specific element of
reference.
[0010] FIG. 3 indicates an axial section of the drum shell, upon
which are special through slots geometrically congruent with the
correspondent reference elements that each toolholders has.
[0011] FIG. 4 shows a transversal section of the drum by a
toolholder, which is already in place but not yet welded. It can be
noticed the inserting of the reference element in the corresponding
slot on the cylindrical shell of the drum.
[0012] FIG. 5 highlights the welding to fix the toolholder, whose
positioning is guaranteed by the reference element inserted in the
congruent slot on the drum.
[0013] FIG. 6 represents a toolholder with two cylindrical
reference elements.
[0014] FIG. 7 represents a toolholder with three cylindrical
reference elements.
[0015] FIG. 8 represents a toolholder with a shaped reference
element.
[0016] FIG. 9 shows a drum equipped with toolholders with their own
milling tool.
[0017] In the figures each detail is marked as follows:
[0018] 1 indicates the hollow cylindrical drum of a milling
machine
[0019] 2 are the through slots that go through the drum shell.
[0020] 3 indicates a toll-holder
[0021] 4, 4' and 4" indicate the reference elements with which the
toolholders are provided.
[0022] It should be highlighted that said reference elements are
geometrically congruent with the correspondent slots in which they
are inserted to guarantee the right position of the toolholder on
the drum.
[0023] 5 indicates the milling tool fixed onto the toolholder.
[0024] The clearness of the figures highlights the simplicity and
total reliability of the improved system which is the object of the
present invention.
[0025] It is evident that the slots that go through the hollow
shell of the drum will be always present even in extreme situations
in which each reference point could disappear, thus not being
properly located.
[0026] The slots that go through the cylindrical mantel of the drum
constitute the inventive core of the present improved system. These
ineffaceable slots allow always for the exact repositioning of the
spare toolholder, that could be welded upon the drum with its own
original geometric set-up.
[0027] The invention of course allows several versions of practical
realization, as far as the structural proportioning, the
morphologic and technological choices of the reference elements and
their congruent slots are concerned.
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