EP2532452A1 - Procédé et outil de poinçonnage et de dressage de tôles - Google Patents

Procédé et outil de poinçonnage et de dressage de tôles Download PDF

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Publication number
EP2532452A1
EP2532452A1 EP11169497A EP11169497A EP2532452A1 EP 2532452 A1 EP2532452 A1 EP 2532452A1 EP 11169497 A EP11169497 A EP 11169497A EP 11169497 A EP11169497 A EP 11169497A EP 2532452 A1 EP2532452 A1 EP 2532452A1
Authority
EP
European Patent Office
Prior art keywords
tool
punching
sheet
die
chamfer
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.)
Granted
Application number
EP11169497A
Other languages
German (de)
English (en)
Other versions
EP2532452B1 (fr
Inventor
Alexander Tatarczyk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf Werkzeugmaschinen SE and Co KG
Original Assignee
Trumpf Werkzeugmaschinen SE and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Priority to EP11169497.2A priority Critical patent/EP2532452B1/fr
Priority to CN201210185082.2A priority patent/CN102814382B/zh
Priority to JP2012131724A priority patent/JP5968091B2/ja
Priority to US13/493,506 priority patent/US9266163B2/en
Publication of EP2532452A1 publication Critical patent/EP2532452A1/fr
Application granted granted Critical
Publication of EP2532452B1 publication Critical patent/EP2532452B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D28/34—Perforating tools; Die holders
    • B21D28/343—Draw punches
    • 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
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
    • 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

Definitions

  • the invention relates to a method for punching and straightening of sheets, in particular a punching of sheets on a punching machine with a specially suitable stamp, so that the sheet flatness is maintained.
  • the sheet is pressed by means of a punch in an opening of a die.
  • the contour of the punch corresponds to the opening of the die.
  • the opening of the die is circumferentially larger by a few tenths of a millimeter than the dimensions of the punch.
  • the bent sheet metal is made tension-free by multiple forming of the sheet by an arrangement of several rolls. During the movement through the rollers, the sheet is caused to bend again and again in the opposite direction. By this multiple bending of the sheet, the stresses are removed and there is a flat, tension-free sheet metal.
  • this processing is complicated because an additional machine and other operations are required. In addition, this processing is not possible for sheets in which conversions were already introduced on the punching machine.
  • the object is achieved by a method according to claim 1 and a punching tool according to claim 8. Further developments of the invention are the subject of the dependent claims.
  • a punching machine 1 is shown with a punching tool according to the invention.
  • An essential part of the punching machine 1 is a C-frame 2.
  • the C-frame 2 consists of a torsion-resistant welded steel construction. Alternatively, the frame can also be implemented in a different form.
  • a hydraulic unit 3 is provided, with which a plunger 4 is hydraulically driven via a plunger control 5.
  • the punching machine has an axis 6, which forms the central axis of a lower, first tool holder 7 and the plunger 4 with an upper, second tool holder 30.
  • the first tool holder 7 is provided on the lower inside of the C-frame 2 for receiving a tool lower part 17 of the punching tool.
  • the first tool holder 7 is rotatable about a rotary drive, not shown, and lockable in any angular position.
  • the first tool holder 7 has a drive 8, which moves the first tool holder 7 along the axis 6 up and down.
  • the drive 8 can be controlled so that it can stop at any position within its travel path and then drive backwards or forwards.
  • the plunger 4 is provided on the upper inside of the C-frame 2.
  • the plunger 4 with the second tool holder 30 receives a tool upper part 16 of the punching tool positively and without play.
  • the plunger 4 is also rotatable and can also be detected in any angular position. For a second, not shown, rotary drive is available. Also, the plunger 4, driven by the plunger control 5, at any position within its stroke along the Axis 6 are stopped, and then moved up or down further.
  • All actuators such as the rotary actuators, the plunger control 5 and the drive 8 of the first tool holder 7 are driven by a machine control device, not shown, which is provided in a separate control cabinet (not shown). Furthermore, all drives for moving a metal plate 15 to be processed and actuators for special functions are controlled by the machine control device.
  • the control device has as input and output means a keyboard and a monitor. The control functions are performed by microcontrollers. Processing programs and operating parameters are stored in a memory area of the control device.
  • a machine table 9 On the lower inside of the C-frame 2, a machine table 9 is arranged, which has a cross rail 10 with a tool magazine 11. On the cross rail 10 clamping claws 12 are arranged for holding the sheet 15. The clamping claws 12 can be fixed at suitable locations on the cross rail, and can be offset so that the sheet 15 is held securely, but the sheet 15 is not gripped at a location to be machined.
  • tool magazine 11 more, here three, tool holders 13 for several, here two, punching tools 14 are present.
  • the machine table 9 drives to punch together with the cross rail 10, on which the clamps 12 are fixed, with which the plate 15 is held, in a Y-direction in a programmed position, and the cross rail 10 moves in the X direction in the programmed position, wherein the plate 15 slides over the machine table 9. Then, from the plunger 4 a Punching stroke performed. Following this, the next punching position is approached according to the same principle.
  • a punching tool 14 is shown, that has a die 17 and the upper die 16 as a tool lower part.
  • the upper tool part 16 has a shank 18 which is shaped so that it can be received in the second tool holder 30 in a form-fitting and clearance-free manner.
  • the upper tool part 16 has a punch 19.
  • the die 17 is shaped so that it can be received positively and without play in the lower, first tool holder 7.
  • the die 17 has an opening 20 which is designed so that a desired punched out of the sheet 15 can be punched out.
  • the opening 20 is complementary to the stamp 19th
  • the upper tool part 16 and the die 17 have a common axis 29.
  • a gap of a few tenths of a millimeter is provided radially circumferentially, which is referred to as a cutting gap.
  • the upper tool part 16 may be received in the lower, first tool holder 7, and the die 17 may be received in the upper, second tool holder 30.
  • Fig. 3a shows a perspective view of the tool upper part 16, and Fig. 3b shows an enlarged section of the punch 19 seen from the direction of view A.
  • the upper tool part 16 has an end face 21. Adjacent to the end face 21, a chamfer 22 is circumferentially provided along an edge 28 of the surface. Subsequent to the chamfer 22, the punch 19 has a side surface 23. Between the side surface 23 and the chamfer 22, a chamfer angle ⁇ is formed. The distance between the end face 21 and an edge 24, which forms the transition between the chamfer 22 and the side surface 23 defines a chamfer height H.
  • a collar is provided, wherein between the punch 19th and the collar 26, a transition 25 is formed, which has a radius.
  • the collar 26 has a recess 27.
  • the design of the collar 26 is selected so that the tool upper part 16, depending on the embodiment, can be received in the first tool holder 7 or the second tool holder 30.
  • the radial distance between the axis 29 and the edge 28 is smaller than the radial distance between the axis 29 and the side surface 23.
  • the distance between the axis 29 and the side surface 23rd is circumferentially chosen so that a suitable first cutting gap between the side surface 23 and the opening 20 of the die 17 (FIG. Fig. 2 ). Due to the bevel 22 results at the end of the punch 19, as compared to the first cutting gap, a widening in the course of the chamfer second cutting gap between the chamfer 22 and the opening 20th
  • the die 17 is received in the first tool holder 7.
  • the upper tool part 16 is received in the second tool holder 30.
  • the plate 15 is inserted between the punch 19 and the die 17 by a corresponding device of the punching machine 1.
  • the sheet metal 15 is positioned so that a desired opening can be introduced at a designated location in the sheet 15.
  • the tool upper part 16 moves down, and the desired opening in the plate 15 is produced.
  • the size of the introduced radial forces can be changed by an adaptation of the punch 19.
  • the chamfer angle ⁇ is 30 °. Good results in terms of sheet flatness are also achieved at the chamfer angle ⁇ in a range of 15 ° to 45 °. better Alternatively, a punching tool 14, wherein the chamfer angle ⁇ is between 25 ° and 35 °.
  • the chamfer height H results from the chamfer angle ⁇ and the distance between the axis 29 and the edge 28.
  • the chamfer angle ⁇ is circumferentially constant.
  • the chamfer height is determined, whereby the determination of the chamfer height H takes place as a function of different processing parameters.
  • the parameters are the tensile strength of the sheet 15, the sheet thickness and the shape of the end face 21 and the contour of the edge 28, so the shape of the punched.
  • the chamfer height H tends to be set larger with increasing sheet thickness. In general, it is necessary for an increased tensile strength of the material of the sheet 15 that a larger chamfer height H is selected. With regard to the shape of the end face 21, the chamfer height H is determined with regard to a good planarity of the sheet.
  • the sheet is pressed against a wiper having both rigid outer and elastic inner portions. In the elastic region of the scraper, the plate 15 is then bent upwards and plastically deformed.
  • a degree of destruction indicates a ratio between the area of punched-out openings and the area of the remaining material of the sheet 15 in a certain area. The more openings are punched out, or the larger the openings, the more greater is the degree of destruction in a certain area of the sheet.
  • the shape of the end face 21 also has an influence on the way by which the die 17 has to be extended.
  • the path is determined as a function of the shape of the end face 21.
  • the flatness of the sheet can be maintained even at degrees of destruction of about 40% to 50%, which is not possible with conventional punching alone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP11169497.2A 2011-06-10 2011-06-10 Procédé de poinçonnage et de dressage de tôles Active EP2532452B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP11169497.2A EP2532452B1 (fr) 2011-06-10 2011-06-10 Procédé de poinçonnage et de dressage de tôles
CN201210185082.2A CN102814382B (zh) 2011-06-10 2012-06-06 冲孔和矫平金属板的方法及其工具
JP2012131724A JP5968091B2 (ja) 2011-06-10 2012-06-11 金属薄板を打ち抜き、歪みを取るための方法並びにそのための工具
US13/493,506 US9266163B2 (en) 2011-06-10 2012-06-11 Punching sheet metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11169497.2A EP2532452B1 (fr) 2011-06-10 2011-06-10 Procédé de poinçonnage et de dressage de tôles

Publications (2)

Publication Number Publication Date
EP2532452A1 true EP2532452A1 (fr) 2012-12-12
EP2532452B1 EP2532452B1 (fr) 2014-03-12

Family

ID=44503527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11169497.2A Active EP2532452B1 (fr) 2011-06-10 2011-06-10 Procédé de poinçonnage et de dressage de tôles

Country Status (4)

Country Link
US (1) US9266163B2 (fr)
EP (1) EP2532452B1 (fr)
JP (1) JP5968091B2 (fr)
CN (1) CN102814382B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2923778A3 (fr) * 2014-03-24 2016-03-16 TRUMPF Werkzeugmaschinen GmbH + Co. KG Procédé à realiser des trous chanfreinés dans un matériau en forme de plaque
CN111570604A (zh) * 2020-05-20 2020-08-25 刘兆根 一种汽车钣金件表面连续冲孔装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014004329A1 (de) * 2014-03-26 2015-10-01 Ulrich Bruhnke Verfahren und Vorrichtung zum Bearbeiten von stranggepessten Profilabschnitten aus Magnesium oder Magnesiumlegierungen und ein daraus hergestelltes Leichtbauelement
US20200306820A1 (en) * 2019-01-25 2020-10-01 Snap-On Incorporated Socket punches
TWI737536B (zh) * 2020-11-09 2021-08-21 偉哲 高 沖孔機結構

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU442872A1 (ru) * 1973-03-12 1974-09-15 Кадиевский Вагоностроительный Завод Пуансон к штампу дл пробивки отверсти с фаской
JPS59174233A (ja) * 1983-03-24 1984-10-02 Taiho Kogyo Co Ltd 仕上げ抜き方法及びその装置
US4526077A (en) * 1983-07-21 1985-07-02 Detroit Punch & Retainer Corporation Heavy duty punch
GB2255304A (en) * 1991-04-26 1992-11-04 Toyota Motor Co Ltd Piercing die whose punch has different amounts of chamfer at different peripheral edge portions
US5746104A (en) * 1996-08-23 1998-05-05 Wilmington Rubber & Gasket Co., Inc. Two-piece hole punch
US5992280A (en) * 1992-12-07 1999-11-30 Fuji Photo Film Co., Ltd. Perforator for metal plate
JP2005193251A (ja) * 2003-12-26 2005-07-21 Magical:Kk 離煙用パイプの微小空気孔加工法及びその加工法による離煙用パイプ
JP2005324236A (ja) * 2004-05-14 2005-11-24 Ricoh Co Ltd 半抜き加工用パンチ、及び、プレス型、半抜き形状部材、及び画像形成装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4869141A (en) * 1984-10-16 1989-09-26 Trumpf Gmbh & Co. Punch press with rotary ram and method of operating same
JPH0810865A (ja) * 1994-06-22 1996-01-16 Unai Kinzoku Kogyo Kk プレス製品の周面仕上げ装置及び方法
JPH11254061A (ja) * 1998-03-09 1999-09-21 Nec Corp タレットパンチプレスとその金型及び打ち抜き加工方法
JP2006289491A (ja) * 2005-03-14 2006-10-26 Nippon Steel Corp 耐割れ特性に優れた高強度鋼薄板の加工方法及び切断加工用切断刃
JP2008290128A (ja) * 2007-05-25 2008-12-04 Nippon Steel Corp 打ち抜き装置及び打ち抜き方法
CN102363178A (zh) * 2011-10-20 2012-02-29 山东通力车轮有限公司 车轮冲孔挤压复合冲头

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU442872A1 (ru) * 1973-03-12 1974-09-15 Кадиевский Вагоностроительный Завод Пуансон к штампу дл пробивки отверсти с фаской
JPS59174233A (ja) * 1983-03-24 1984-10-02 Taiho Kogyo Co Ltd 仕上げ抜き方法及びその装置
US4526077A (en) * 1983-07-21 1985-07-02 Detroit Punch & Retainer Corporation Heavy duty punch
GB2255304A (en) * 1991-04-26 1992-11-04 Toyota Motor Co Ltd Piercing die whose punch has different amounts of chamfer at different peripheral edge portions
US5992280A (en) * 1992-12-07 1999-11-30 Fuji Photo Film Co., Ltd. Perforator for metal plate
US5746104A (en) * 1996-08-23 1998-05-05 Wilmington Rubber & Gasket Co., Inc. Two-piece hole punch
JP2005193251A (ja) * 2003-12-26 2005-07-21 Magical:Kk 離煙用パイプの微小空気孔加工法及びその加工法による離煙用パイプ
JP2005324236A (ja) * 2004-05-14 2005-11-24 Ricoh Co Ltd 半抜き加工用パンチ、及び、プレス型、半抜き形状部材、及び画像形成装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2923778A3 (fr) * 2014-03-24 2016-03-16 TRUMPF Werkzeugmaschinen GmbH + Co. KG Procédé à realiser des trous chanfreinés dans un matériau en forme de plaque
CN111570604A (zh) * 2020-05-20 2020-08-25 刘兆根 一种汽车钣金件表面连续冲孔装置
CN111570604B (zh) * 2020-05-20 2022-01-18 武汉新途汽配制造有限公司 一种汽车钣金件表面连续冲孔装置

Also Published As

Publication number Publication date
CN102814382B (zh) 2016-03-16
JP2013000801A (ja) 2013-01-07
JP5968091B2 (ja) 2016-08-10
US20120312064A1 (en) 2012-12-13
EP2532452B1 (fr) 2014-03-12
US9266163B2 (en) 2016-02-23
CN102814382A (zh) 2012-12-12

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