EP1017517B1 - A method for punching and a punch die - Google Patents
A method for punching and a punch die Download PDFInfo
- Publication number
- EP1017517B1 EP1017517B1 EP98928737A EP98928737A EP1017517B1 EP 1017517 B1 EP1017517 B1 EP 1017517B1 EP 98928737 A EP98928737 A EP 98928737A EP 98928737 A EP98928737 A EP 98928737A EP 1017517 B1 EP1017517 B1 EP 1017517B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- punch
- holes
- wall
- die
- punched
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
- B26F1/14—Punching tools; Punching dies
Definitions
- the present invention relates to a method of the kind defined in the preamble of Claim 1 and in the document DE-A-2 024 620.
- Holes can normally be punched in a workpiece with no difficulty, provided that the holes shall be punched through a part of the workpiece where both sides of said are freely accessible from outside the workpiece, for instance when holes are to be punched in sheet material.
- the sheet, plate or strip is then laid against a fixed support surface that includes punch cavities and a punch-carrying tool is positioned with the punches opposite the punch cavities and pressed down against the sheet and therewith punch-out the holes.
- the object of the present invention is to endeavour to overcome this problem and to provide a method which will enable holes to be punched in two-wall workpieces regardless of the material from which they are made.
- the insertion of a die between the two walls of the workpiece provides an anvil means which fills out the space between said walls and provides support for the wall as it is met by the punch.
- the anvil means enables the hole or holes to be punched without deforming the wall.
- the method can be applied for punching-out a single hole, it is primarily advantageous for use when punching-out a plurality of holes simultaneously in the wall of the workpiece. This constitutes a preferred embodiment of the inventive method.
- punching of the holes is carried out in two stages, wherein the holes are punched in the second wall after having removed the die.
- the punches move down through the holes made in the first wall.
- a workpiece 1 in the form of a two-wall elongated strip having a bottom wall 2 and a top wall 3 in which respective rows of holes 10, 4 have been punched.
- the illustrated workpiece may be made of aluminium, for instance.
- Fig. 2 illustrates the difficulty of punching holes in such a workpiece. If the workpiece is simply clamped to the work table of the punching machine, the upper wall 3 will not be supported and the punch 5 will deform the wall 3 as it punches holes therein. The disc punched from the workpiece will remain on the bottom wall and present an obstacle to continued punching.
- Figs. 3 and 5 illustrate the manner in which holes are punched in the upper wall 3 of the workpiece 1 in accordance with the invention.
- a die 8 is inserted in the space between the two walls 2, 3, so as to support the upper wall 3.
- the upper side of the die 8 is provided with punch cavities 7a, 7b etc., and the die is positioned so that the punch cavities are located centrally of respective punches 5a, 5b etc.
- the die thus functions as an effective anvil means, therewith enabling the holes 4 to be punched readily in the upper wall 3.
- the length of stroke of the punches must be limited in the first punching operation, so that the discs punched from the workpiece will not be pressed firmly into the die cavities and become fixed therein.
- the discs punched from the holes 7a, 7b etc. are removed from the die 8, for instance with the aid of compressed air, and the die 8 then inserted into the new workpiece.
- Withdrawal and insertion of the die 8 may, of course, be controlled automatically or effected purely manually.
- a punch die that is common for all holes to be punched in the upper wall 3. It is also conceivable, however, to use two (or more) shorter units and to insert a die into the workpiece from each direction.
- the invention is primarily conceived for punching holes in a workpiece of the illustrated appearance, it will be apparent that the invention can also be applied with workpieces that have lateral extensions in two directions where the holes are distributed over one surface instead of along a strip.
- the illustrated example can be readily modified for use when the two walls are angled to one another, i.e. not parallel. Neither is the inventive method restricted to square profiles, but can also be applied to U-profiles or to a double-wall workpiece in which the two walls are joined together solely at certain places.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Punching Or Piercing (AREA)
Abstract
Description
Claims (3)
- A method of punching one or more holes (4, 10) in a two-wall workpiece (1) where said walls (2, 3) are mutually interspaced, wherein the hole/holes is/are punched through the first and second of said walls, comprising inserting between the walls a die, (8) provided with punch cavities (7; 7a; 7b), whose thickness corresponds essentially to the distance between the walls, and activating a punch tool that carries one or more punches (5; 5a, 5b) such as to punch a hole or holes in the first wall, subsequent to having moved the die to a position in which a punch cavity is located centrally opposite its respective punch, the punch cavity having a cross section corresponding to the cross section of the respective punch, so that each hole (4) is formed by cutting away a disc from said first wall (3), which disc is received in the cavity, and characterised in that, subsequent to having punched the hole/holes in said first wall, the die (8) removed from said interspace and the hole//holes (10) are punched in the second wall (2) in a second punching operation in which the punch/punches moves/move through the hole/holes (4) punched in the first wall (3).
- A method according to Claim 1, in which a plurality of holes (4) are punched simultaneously in said first wall (3), wherein the die (8) has a plurality of punch cavities (7a, 7b) and the punch tool has a corresponding number of punches (5a, 5b).
- A method according to Claim 1 or 2, in which the workpiece (1) is an elongated metal strip of box-like cross-section, wherein the die (8) is inserted into the box-like profile in the longitudinal direction of the strip.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9702153A SE512912C2 (en) | 1997-06-05 | 1997-06-05 | Procedure for punching and punching |
SE9702153 | 1997-06-05 | ||
PCT/SE1998/001044 WO1998055244A1 (en) | 1997-06-05 | 1998-06-02 | A method for punching and a punch die |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1017517A1 EP1017517A1 (en) | 2000-07-12 |
EP1017517B1 true EP1017517B1 (en) | 2003-02-26 |
Family
ID=20407268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98928737A Expired - Lifetime EP1017517B1 (en) | 1997-06-05 | 1998-06-02 | A method for punching and a punch die |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1017517B1 (en) |
AT (1) | ATE233138T1 (en) |
AU (1) | AU8046398A (en) |
DE (1) | DE69811697T2 (en) |
DK (1) | DK1017517T3 (en) |
SE (1) | SE512912C2 (en) |
WO (1) | WO1998055244A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013003118B4 (en) * | 2013-02-25 | 2015-03-26 | Jenoptik Automatisierungstechnik Gmbh | A method for disposing of a Bußens incurred in a perforation process of a hollow section |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
YU33025B (en) * | 1969-10-07 | 1976-03-31 | J Milek | Uredaj za stancanje perforacija na cijevima raznih duzina i oblika |
GB1329095A (en) * | 1970-08-20 | 1973-09-05 | Hdson L G | Method and apparatus for perforating tubes |
US4679289A (en) * | 1986-08-15 | 1987-07-14 | Brazeway, Inc. | Method and apparatus for forming intruded branch attachment structures in tubing |
IE60206B1 (en) * | 1987-12-04 | 1994-06-15 | Higgins Joseph Augustine | "A method and apparatus for punching" |
DE4334203C2 (en) * | 1992-10-20 | 2003-08-07 | Karl-Heinz Staffa | Tool for inserting passages in a header pipe of a heat exchanger |
-
1997
- 1997-06-05 SE SE9702153A patent/SE512912C2/en not_active IP Right Cessation
-
1998
- 1998-06-02 EP EP98928737A patent/EP1017517B1/en not_active Expired - Lifetime
- 1998-06-02 DK DK98928737T patent/DK1017517T3/en active
- 1998-06-02 WO PCT/SE1998/001044 patent/WO1998055244A1/en active IP Right Grant
- 1998-06-02 AU AU80463/98A patent/AU8046398A/en not_active Abandoned
- 1998-06-02 DE DE69811697T patent/DE69811697T2/en not_active Expired - Fee Related
- 1998-06-02 AT AT98928737T patent/ATE233138T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE69811697T2 (en) | 2003-10-23 |
DK1017517T3 (en) | 2003-06-10 |
SE512912C2 (en) | 2000-06-05 |
AU8046398A (en) | 1998-12-21 |
DE69811697D1 (en) | 2003-04-03 |
SE9702153D0 (en) | 1997-06-05 |
EP1017517A1 (en) | 2000-07-12 |
WO1998055244A1 (en) | 1998-12-10 |
ATE233138T1 (en) | 2003-03-15 |
SE9702153L (en) | 1998-12-06 |
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