US3878746A - Burless blanking machine and process - Google Patents

Burless blanking machine and process Download PDF

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Publication number
US3878746A
US3878746A US418626A US41862673A US3878746A US 3878746 A US3878746 A US 3878746A US 418626 A US418626 A US 418626A US 41862673 A US41862673 A US 41862673A US 3878746 A US3878746 A US 3878746A
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US
United States
Prior art keywords
punch
die
aperture
clamping plate
drive slide
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
Application number
US418626A
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English (en)
Inventor
Werter Carmeli
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.)
International Business Machines Corp
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International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
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Publication of US3878746A publication Critical patent/US3878746A/en
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Expired - Lifetime legal-status Critical Current

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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
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0581—Cutting part way through from opposite sides of work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2096—Means to move product out of contact with tool
    • Y10T83/2122—By ejector within a hollow cutter
    • Y10T83/2129—By means carried by cooperating cutter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2096—Means to move product out of contact with tool
    • Y10T83/2135—Moving stripper timed with tool stroke
    • Y10T83/215—Carried by moving tool element or its support
    • Y10T83/2153—Fluid pressure actuated stripper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8776—Constantly urged tool or tool support [e.g., spring biased]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8825—With lost motion in tool drive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8835—And means to move cooperating cutting member

Definitions

  • This invention is directed to blanking apparatus and processes. more particularly to a line blanking apparatus and a process for blanking burless pieces with a fine blanking machine.
  • tool assemblies comprising essentially a die and a punch which are mounted on a single-action press.
  • the pieces blanked according to said methods present major surfaces which are neither coplanar nor parallel to each other. and present lateral surfaces which are very rough and non perpendicular to the major surfaces and have cranks whose depth depends on the hardness of the material.
  • a still further object of the present invention is to provide an improved triple-action press for blanking high precision smooth finish thin pieces.
  • FIG. I is a fragmentary cross sectional view of the triple-action press in accordance with the present invention.
  • FIG. 2 is a cross sectional view of the elastic member to be used in the press in accordance with the present invention.
  • FIGS. 3. 4 and 5 show three different moments of the blanking cycle in accordance with the present invention.
  • the mount I is supported by the machine frame 2 and in turn supports the die 3.
  • the die 3 has a substantially flat outer surface 4 and is provided with a die aperture 5.
  • the number 6 generally indicates the stripper. which consists of a stripper body 7. a flange 8 and a worksurface 9.
  • the stripper body 7. which has a cross section complementary to the die aperture S, is partially nested in said die aperture and is slid-ably guided by the walls which define it.
  • the flange 8 is slidably guided by the walls defining the chamber 10 in the mount 1 and.
  • the mount 13 of the clamping plate is supported by the base l4 and in turn supports the clamping plate 15.
  • the clamping plate 15 has a substantially flat outer surface 16 and is provided with an aperture [7 which has the same cross section as the die aperture 5 and is aligned therewith.
  • the base 14, slidably guided by means not shown. is vertically movable under the action of the hydraulic cylinder 18.
  • the number 19 generally indicates the punch. which consists of a punch body 20. a head portion 21 and a work surface 22.
  • the punch body 20 has a cross section complementary to the clamping plate aperture l7. in which it is partially nested. and is slidably guided by the walls defining said aperture.
  • the work surface 22 of the punch is. in the position shown. flush with the outer surface of the clamping plate.
  • the head portion 21 of the punch I9 has a circu lar section and is slid-ably guided by the walls defining the chamber 23 in the mount l3.
  • the plate 25 is fastened to the lower end of the punch head portion and engages an elastic element connecting said plate 25 to the plate 26, which in turn is secured to the drive slide 24 vertically movable under the action of the main motor (not shown).
  • FIG. 2 A cross section of the elastic member connecting the punch to the drive slide is shown in FIG. 2.
  • Said elastic member comprises an upper plate 25 to be fastened to the punch. a lower plate 26 to be secured to the drive slide. a cup spring 27, bushes 28, screws 29 and washers 30.
  • the upper plate 25 comprises a central body 31, a flange 32 provided with holes 33, and a member 34 disposed on the upper side of the central body 31 which is apt to engage a recess in the punch.
  • An annular recess 35 opens in the lower surface 36 of the upper plate 25 and is coaxial with the plate itself.
  • the lower plate 26 is provided with threaded holes 37, in which screws 29 engage, said holes being coaxial with the holes 33 in the flange 32. and further provided with the central threaded hole 40 which is able to engage a suitable member of the drive slide 24.
  • the cup spring 27 is nested in the annular recess 35 and engages both the bottom surface 38 of said recess and the upper surface 39 of the lower plate 26.
  • the bushes 28 are inserted into the holes 33 of the flange 32 and the screws 29 with the washers 30 fasten said bushes to the lower plate 26. so that the upper plate 25 is reciprocably movable with respect to the lower plate 26., said upper plate 25 being slidably guided by the bushes 28.
  • the maximum spacing between the lower plate and the upper plate is determined by the length of the bushes 28.
  • the burless fine blanking process requires a triple action press.
  • the three machine actions actuate respectively the stripper 6a.
  • the clamping plate 150 and the punch 19a and their magnitude and phase must be adjusted so that the following condi tions are attained:
  • the action on the clamping plate 150 must be greater than the action on the stripper 6a.
  • the action on the punch 19a must be sufficient to overcome the blanking stress of the material to be blanked plus the actions on the clamping plate a and on the stripper 6a.
  • the machine cycle can be divided into three main subcycles which we shall name first stroke.” second stroke" and ejection and reset.” Said three machine subcycles will be first briefly defined and then described in details.
  • the subcycle defined first stroke begins as the machine starts; the machine is shown in its rest position in FIG. 3.
  • the stripper 60 acts as a punch and the clamping plate 150 acts as a die.
  • the punch 19a acts as a blank holder (and follows closely the piece to be blanked): this is a blanking stroke opposed to the usual one and the partial blanking depth on the punch side is equal to the initial distance between the two plates 25 and 26.
  • the second subcycle defined second stroke begins when the punch 19b has compressed the spring 271) of the elastic member at its maximum and a rigid connection between the punch 19b and the drive slide 24!; has been achieved.
  • the drive slide 24b actuates directly the punch l9h which penetrates into the material to be blanked overcoming the opposite actions on the stripper 6b and on the clamping plate 15b.- this is the actual blanking stroke during which the material is forced to enter the die 3b and is completely blanked.
  • the third subcycle. that we have defined ejection and reset. begins when the punch 19b and the drive slide 24h reverse their motion. During said subcycle the blanked piece is ejected and the machine reset.
  • the machine is shown in its rest position in FIG. 3.
  • the punch work surface 22a is substantially flush with the clamping plate outer surface 16a.
  • the elastic member spring 270 has the maximum extension compatible with the elastic member adjustment; said adjustment determines the depth of the partial blanking on the punch side.
  • the hydraulic cylinder 11a actuates the stripper 6a through the ram 12a. Said action is sufficient to overcome the strain strength of the material to be blanked, plus the force exerted by the spring 270 on the punch 19a.
  • the pressure in the hydraulic cylinder 18a is sufficient to bear the weight of the base 14a. of the mount 13a and of the clamping plate 15a.
  • the drive slide 24a begins moving upwards driven by the main motor through a double toggle mechanism (not shown in the figures). Since the pressure in the cylinder 18a is sufficient to bear the weight of the base and of the assembly it supports. the base 140. the mount 13a and the clamping plate will follow the movement of the drive slide 24a. Likewise. since the elastic element 27a is able to bear the weight of the punch 19a. the punch 190 will follow the upward movement of the drive slide. As a result. the drive slide 240, the clamping plate 150 and the punch 190 will move upwards, maintaining the same position with respect to one another as in the rest position. When the clamping plate outer surface 16a meets the material to be blanked. the action of the drive slide is transmitted to said material.
  • the clamping plate 15a continues its upward motion pushing that part of the material to be blanked which does not face the work surface 9a of the stripper 60, while that part of the material which faces the work surface 90 is stopped and forced to penetrate into the aperture of the clamping plate 15a.
  • the punch which forces the material into the aperture 170 of the clamping plate 15a, the punch [90 recedes with respect to the clamping plate 150 and follows under pressure the material. while it is partially blanked. preventing the material from bending and in so doing altering the real dimensions of the perimeter so impressed. Since the drive slide 24a continues moving upwards and the punch 19a stands still. the elastic member spring 27a is compressed.
  • the first subcycle. i.e. the first stroke is completed. That part of the material which faces the work surface of the stripper has been forced into the clamping plate aperture for a depth essentially equal to the initial distance between the plates 25 and 26 of the elastic member. Since said distance is less than the thickness of the material to be blanked. the material has been partially blanked on the punch side and the edges of the partially blanked figure are rounded off. As shown in FIG. 4 the elastic member spring 27b is completely compressed and the plates 25b and 26b of the elastic member are in contact. The punch 19b and the drive slide 24b are now rigidly connected and the second subcycle. i.e. the second stroke begins.
  • the pressure in the cylinder 11c. acting on the stripper 6c and the pressure in the cylinder 18c acting on the clamping plate lSc are momentarily interrupted.
  • the punch 19(- moves downward and the pressure on the clamping plate c is reset.
  • the punch 19c continues moving downward and comes out of the blanked material.
  • the pressure acting on the stripper 6c is reset.
  • the material is caused to advance to another work position and air blasts blow away the blanked piece.
  • the machine cycle is over and an identical cycle is ready to start.
  • a blanking press comprising:
  • a die having a die aperture. said die being rigidly secured to said frame;
  • a stripper disposed within said die aperture and slidably guided by said die aperture, said stripper projecting from the outer surface of said die during one predetermined period of the machine cycle;
  • a clam ping plate opposed to said outer surface of said die for clamping the material to be blanked against said outer surface of said die, said clamping plate being provided with an aperture.
  • said aperture having essentially the same section of and being essen- 6 tially aligned with said die aperture:
  • said means being able to maintain the work surface of said punch substantially flush with the work surface of said clamping plate during another predetermined period of the machine cycle. said means being further able to allow said punch to recede into said aperture of said clamping plate a predetermined distance after which said means supply a direct transmission of the motion of said drive slide to said punch;
  • a blanking press according to claim I wherein said means for connecting said punch and said drive slide comprise essentially a first plate secured to said punch. a second plate secured to said drive slide and a spring at least partially nested between said plates within a suitable cavity formed in said plates. so that said punch and said drive slide can approach compressing said spring until said plates meet and form a rigid transmission of the motion from said drive slide to said punch.
  • said means for actuating said clamping plate is hydraulic means and said means for actuating said drive slide is mechanical means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Control Of Cutting Processes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
US418626A 1972-12-22 1973-11-23 Burless blanking machine and process Expired - Lifetime US3878746A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT33436/72A IT972789B (it) 1972-12-22 1972-12-22 Procedimento e dispositivi di tranciatura senza bave

Publications (1)

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US3878746A true US3878746A (en) 1975-04-22

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US418626A Expired - Lifetime US3878746A (en) 1972-12-22 1973-11-23 Burless blanking machine and process

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US (1) US3878746A (enrdf_load_html_response)
JP (1) JPS5421029B2 (enrdf_load_html_response)
DE (1) DE2356217A1 (enrdf_load_html_response)
FR (1) FR2211300B1 (enrdf_load_html_response)
GB (1) GB1406397A (enrdf_load_html_response)
IT (1) IT972789B (enrdf_load_html_response)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991641A (en) * 1975-07-18 1976-11-16 Springfield Tool & Die, Inc. Piercing apparatus
US4220272A (en) * 1978-10-30 1980-09-02 Danti Bernard R Precision cutting means
US4477537A (en) * 1982-09-23 1984-10-16 Blase Tool And Manufacturing Co., Inc. Method for producing burr-free blanks and the blanks produced thereby
US4897919A (en) * 1986-10-27 1990-02-06 Black & Decker Inc. Method for producing a stamped substrate
US5035049A (en) * 1986-10-27 1991-07-30 Black & Decker Inc. Method for producing a stamped substrate
US5163223A (en) * 1991-08-21 1992-11-17 Custom Stamping, Inc. Process for making an electrical connector pin having fully rounded contact surfaces
US5247862A (en) * 1989-09-20 1993-09-28 Feintool International Holding Process for producing burr-free workpieces by blanking, in particular in a counterblanking tool
US5269213A (en) * 1992-02-25 1993-12-14 International Business Machines Corporation Punch apparatus
US5320013A (en) * 1991-06-20 1994-06-14 Fuji Electric Co., Ltd. Method of blanking metal foil on piezoelectric actuator operated press, and die sets for practicing the method
US5842398A (en) * 1995-12-13 1998-12-01 Precious Plate Florida Perforated substrate and method of manufacture
US5979277A (en) * 1992-07-31 1999-11-09 Hitachi Cable, Ltd. Method and apparatus for punching a thin metal tape to provide a lead frame for a semiconductor device
US6125527A (en) * 1997-09-04 2000-10-03 Feintool International Holding Process for producing precise cut surfaces
WO2001021354A1 (en) * 1999-09-17 2001-03-29 Wabash Technology Corporation Method of punching a composite plate
US6347900B1 (en) * 1997-02-10 2002-02-19 Nsk Ltd. Yoke for universal joint, and production process for the same
US6519914B1 (en) 2001-07-12 2003-02-18 Euclid Spiral Paper Tube Corp. Perforation forming module for a packaging machine
US20030066329A1 (en) * 2001-10-10 2003-04-10 Jiro Aizaki Methods and apparatus for manufacturing press formed articles
US20070144230A1 (en) * 2004-04-09 2007-06-28 Shiro Fujimura Shearing device
US20090010723A1 (en) * 2006-02-03 2009-01-08 Willi Grimm Method and Tool for the Precision Cutting of Workpieces with Small Corner Radii and Greatly Reduced Draw-In in a One-Stage Arrangement
WO2009065694A1 (de) * 2007-11-21 2009-05-28 Zf Friedrichshafen Ag Verfahren zum herstellen einer gratfreien schnittfläche und vorrichtung zur durchführung des verfahrens
WO2010140960A1 (en) * 2009-06-02 2010-12-09 Precomp Solutions Aktiebolag Method and device for punching / cutting out a component from a blank
US20110132162A1 (en) * 2008-07-03 2011-06-09 Willi Grimm Method and device for producing precision blankings from a material strip
CN102310144A (zh) * 2010-07-06 2012-01-11 亿和精密金属制品(深圳)有限公司 连续模同步冲裁搭边及去除毛刺的装置
CN103317000A (zh) * 2013-07-15 2013-09-25 驻马店市嵖岈山门业有限公司 门框第一刀冲裁模具
US20130291851A1 (en) * 2012-05-02 2013-11-07 Chun-Sheng Chiang Cutting method for crackly plate-shaped work piece and cutting device thereof
US20160325338A1 (en) * 2014-01-15 2016-11-10 Wolfgang Rixen Method for Creating Through-Passages in a Metal Body by Means of High-Speed Impact Cutting
CN106623594A (zh) * 2016-11-30 2017-05-10 重庆速腾机械制造有限公司 冲压同步去毛刺设备
US20190165537A1 (en) * 2016-07-27 2019-05-30 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Power interface, and method for manufacturing power interface
CN113386004A (zh) * 2021-05-13 2021-09-14 陈鸿 一种钣金弯曲模具

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Publication number Priority date Publication date Assignee Title
JPS5265388A (en) * 1975-11-27 1977-05-30 Nippon Taikou Daisu Kk Shearing method of opposed die press
ATE12594T1 (de) * 1981-03-17 1985-04-15 Edward Donald Bennett Vorrichtung zum stanzen eines zuschnittes aus streifenmaterial.
US4951537A (en) * 1988-09-29 1990-08-28 Ace Technology Corporation Apparatus for producing a blank from stock material
DE19612242A1 (de) * 1996-03-27 1997-10-02 Feintool Int Holding Presse
FR2751571B1 (fr) * 1996-07-25 1999-10-22 Lorraine Laminage Procede de decoupage d'une piece dans un flan de tole
FR2751570B1 (fr) * 1996-07-25 1998-09-04 Lorraine Laminage Procede de decoupage d'une piece dans un flan de tole
RU2252097C1 (ru) * 2003-12-04 2005-05-20 Воронежский государственный технический университет Штамп для реверсивной вырубки
DE102006001389A1 (de) * 2006-01-11 2007-07-12 Mate Precision Tooling Gmbh Umformwerkzeug für eine Stanzmaschine
CN102284596B (zh) * 2011-06-22 2014-02-26 重庆理工大学 基于浮动凹模结构的闭挤式精冲模具

Citations (4)

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US3178975A (en) * 1961-03-24 1965-04-20 Danly Mach Specialties Inc High speed precision blanking press
US3602078A (en) * 1968-08-22 1971-08-31 Hatebur Ag F B Method and apparatus for the manufacture of two annular bodies fitting one within the other
US3640167A (en) * 1969-06-14 1972-02-08 Lorenz Maschf Punching apparatus
US3739669A (en) * 1970-05-29 1973-06-19 Suzuki Motor Co Shearing press of opposing die type

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US3488987A (en) * 1967-12-07 1970-01-13 Oscar W Stoeckli Method and apparatus for producing smooth-edge blanked sheet metal parts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178975A (en) * 1961-03-24 1965-04-20 Danly Mach Specialties Inc High speed precision blanking press
US3602078A (en) * 1968-08-22 1971-08-31 Hatebur Ag F B Method and apparatus for the manufacture of two annular bodies fitting one within the other
US3640167A (en) * 1969-06-14 1972-02-08 Lorenz Maschf Punching apparatus
US3739669A (en) * 1970-05-29 1973-06-19 Suzuki Motor Co Shearing press of opposing die type

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991641A (en) * 1975-07-18 1976-11-16 Springfield Tool & Die, Inc. Piercing apparatus
US4220272A (en) * 1978-10-30 1980-09-02 Danti Bernard R Precision cutting means
US4477537A (en) * 1982-09-23 1984-10-16 Blase Tool And Manufacturing Co., Inc. Method for producing burr-free blanks and the blanks produced thereby
US4897919A (en) * 1986-10-27 1990-02-06 Black & Decker Inc. Method for producing a stamped substrate
US5035049A (en) * 1986-10-27 1991-07-30 Black & Decker Inc. Method for producing a stamped substrate
US5247862A (en) * 1989-09-20 1993-09-28 Feintool International Holding Process for producing burr-free workpieces by blanking, in particular in a counterblanking tool
US5320013A (en) * 1991-06-20 1994-06-14 Fuji Electric Co., Ltd. Method of blanking metal foil on piezoelectric actuator operated press, and die sets for practicing the method
US5163223A (en) * 1991-08-21 1992-11-17 Custom Stamping, Inc. Process for making an electrical connector pin having fully rounded contact surfaces
US5269213A (en) * 1992-02-25 1993-12-14 International Business Machines Corporation Punch apparatus
US5979277A (en) * 1992-07-31 1999-11-09 Hitachi Cable, Ltd. Method and apparatus for punching a thin metal tape to provide a lead frame for a semiconductor device
US5842398A (en) * 1995-12-13 1998-12-01 Precious Plate Florida Perforated substrate and method of manufacture
US6347900B1 (en) * 1997-02-10 2002-02-19 Nsk Ltd. Yoke for universal joint, and production process for the same
US6125527A (en) * 1997-09-04 2000-10-03 Feintool International Holding Process for producing precise cut surfaces
WO2001021354A1 (en) * 1999-09-17 2001-03-29 Wabash Technology Corporation Method of punching a composite plate
US6266865B1 (en) * 1999-09-17 2001-07-31 Wabash Technology Corporation Method of punching a composite plate
US6519914B1 (en) 2001-07-12 2003-02-18 Euclid Spiral Paper Tube Corp. Perforation forming module for a packaging machine
US20030066329A1 (en) * 2001-10-10 2003-04-10 Jiro Aizaki Methods and apparatus for manufacturing press formed articles
US6729172B2 (en) * 2001-10-10 2004-05-04 Araco Kabushiki Kaisha Methods and apparatus for manufacturing press formed articles
US20070144230A1 (en) * 2004-04-09 2007-06-28 Shiro Fujimura Shearing device
US8166854B2 (en) * 2004-04-09 2012-05-01 Toyota Boshoku Kabushiki Kaisha Shearing device
US10022770B2 (en) * 2006-02-03 2018-07-17 Feintool International Holding Ag Method and tool for precision cutting
US20090010723A1 (en) * 2006-02-03 2009-01-08 Willi Grimm Method and Tool for the Precision Cutting of Workpieces with Small Corner Radii and Greatly Reduced Draw-In in a One-Stage Arrangement
WO2009065694A1 (de) * 2007-11-21 2009-05-28 Zf Friedrichshafen Ag Verfahren zum herstellen einer gratfreien schnittfläche und vorrichtung zur durchführung des verfahrens
US8910549B2 (en) * 2008-07-03 2014-12-16 Feintool Industrial Property Ag Method and device for producing precision blankings from a material strip
US20110132162A1 (en) * 2008-07-03 2011-06-09 Willi Grimm Method and device for producing precision blankings from a material strip
WO2010140960A1 (en) * 2009-06-02 2010-12-09 Precomp Solutions Aktiebolag Method and device for punching / cutting out a component from a blank
CN102310144A (zh) * 2010-07-06 2012-01-11 亿和精密金属制品(深圳)有限公司 连续模同步冲裁搭边及去除毛刺的装置
CN102310144B (zh) * 2010-07-06 2013-08-07 亿和精密金属制品(深圳)有限公司 连续模同步冲裁搭边及去除毛刺的装置
US20130291851A1 (en) * 2012-05-02 2013-11-07 Chun-Sheng Chiang Cutting method for crackly plate-shaped work piece and cutting device thereof
CN103317000B (zh) * 2013-07-15 2015-06-03 驻马店市嵖岈山门业有限公司 门框第一刀冲裁模具
CN103317000A (zh) * 2013-07-15 2013-09-25 驻马店市嵖岈山门业有限公司 门框第一刀冲裁模具
US20160325338A1 (en) * 2014-01-15 2016-11-10 Wolfgang Rixen Method for Creating Through-Passages in a Metal Body by Means of High-Speed Impact Cutting
US20190165537A1 (en) * 2016-07-27 2019-05-30 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Power interface, and method for manufacturing power interface
US11431143B2 (en) * 2016-07-27 2022-08-30 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for manufacturing power interface
CN106623594A (zh) * 2016-11-30 2017-05-10 重庆速腾机械制造有限公司 冲压同步去毛刺设备
CN113386004A (zh) * 2021-05-13 2021-09-14 陈鸿 一种钣金弯曲模具

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FR2211300B1 (enrdf_load_html_response) 1978-08-11
IT972789B (it) 1974-05-31

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