US3739669A - Shearing press of opposing die type - Google Patents

Shearing press of opposing die type Download PDF

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Publication number
US3739669A
US3739669A US00144082A US3739669DA US3739669A US 3739669 A US3739669 A US 3739669A US 00144082 A US00144082 A US 00144082A US 3739669D A US3739669D A US 3739669DA US 3739669 A US3739669 A US 3739669A
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United States
Prior art keywords
bolster
press
die member
coaxially
workpiece
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
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US00144082A
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English (en)
Inventor
Y Seki
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.)
Suzuki Motor Corp
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Suzuki Motor Corp
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Filing date
Publication date
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Publication of US3739669A publication Critical patent/US3739669A/en
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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
    • Y10T83/202—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
    • 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
    • Y10T83/566—Interrelated tool actuating means and means to actuate work immobilizer
    • Y10T83/5669—Work clamp
    • Y10T83/5787—Clamp driven by yieldable means
    • Y10T83/5805—Fluid pressure yieldable drive means
    • 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
    • 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
    • Y10T83/929—Tool or tool with support
    • Y10T83/9411—Cutting couple type
    • Y10T83/9423—Punching tool
    • Y10T83/9425—Tool pair

Definitions

  • a press of the opposite die type has a hydraulically actuated main piston in a pressure cylinder operably mounted in a supporting press table.
  • a main bolster carries the lower die and is mounted on the piston.
  • a hydraulically actuated ejector is inserted coaxially in the main piston.
  • a floating bolster carries the upper die that has an annular cutting protrusion opposite to the lower die and that reciprocates through a short stroke movement.
  • a hydraulically actuated break-out punch that is coaxially positioned in the floating bolster coop erates with the ejector to cut off a blank from a workpiece held by the die members,
  • This invention relates to a press for shearing work to obtain fine and smooth sheared surfaces. More specifically, the invention relates to a press of the opposing die type which comprises an upper die formed with an annular bottom surface protrusion and an ordinary lower die located opposite to said upper die. Both dies are located in a working space wherein a workpiece is shorn in such a way that the workpiece is subjected to a compressive deformation while being held between said opposing dies. Subsequently a break-out punch cuts out or knocks out a blank from the workpiece to complete the shearing operation.
  • Shearing operations generally in use cause more or less crowding (or edge sinking), fracture or burr on the sheared surface.
  • the rough conditions of the resulting edges of the product are definitely not desirable.
  • the press according to the present invention overcomes the foregoing difficulties of the existing fine shearing presses.
  • the instant press can shear plates without producing any fracture on the sheared edges and can produce fine and smoothsurfaces free from crowding and burr.
  • the instant press is operated on the concept of increasing the hydrostatic pressure that is exerted on the entire region of the workpiece tobe subjected to plastic deformation, especially in the vicinity of the tool edges, and accomplishing the shearing by a cutting mechamsm.
  • FIGS. 1 to 4 are sequential views of essential parts of a press of the opposing die type for carrying out the shearing of a workpiece in accordance with the present invention:
  • FIG. 1 shows a main piston ascending so that the lower die is in contact with the workpiece and a floating bolster is thereby raised;
  • FIG. 2 shows the tool edge of the lower die cutting in the workpiece;
  • FIG. 3 shows the workpiece being deformed in accordance with the mode of plate compression, with the die having protrusion beginning to cut in; and
  • FIG. 4 shows a break-out punch coming down to a point where the sheared workpiece is knocked out; and
  • FIGS. 5 to 8 are sequential views illustrating the con struction and operation of a press of the opposing die type according to the present invention:
  • FIG. 5 shows the main piston ascending with the workpiece placed on the lower die;
  • FIG. 6 shows the workpiece brought up into contact with the upper die having a protrusion on its bottom surface thereof, with the floating bolster raised,
  • FIG. 7 shows the workpiece being further cut in 2 principally by the tool edge of the lower die;
  • FIGS. 1 to 4 sequentially illustrate the shearing principles of the present invention.
  • a lower die a is shown with a workpiece b to be shorn placed thereon and raised to gether by a main piston (not shown) into contact with an upper die d formed with the protrusion 0 having a fiat seat on its lower end. Also provided are a break-out punch e and an ejector f, which are respectively driven by a break-out piston and an ejector piston not shown.
  • FIG. 2 shows that plastic deformation has been caused in the workpiece b under pressure exerted by the main piston and the die a has slightly risen with respect to the workpiece b.
  • a plane of shear deformation g is formed along the line connecting the tool edge of the die a and the outer tool edge of the die d with the protrusion, and the cutting in the workpiece progresses solely from the tool edge side of the die a by the cutting mechanism.
  • FIG. 3 shows a more advanced stage than in FIG. 2.
  • the distance between the upper surface of the die a and the lower end surface of the die d with the protrusion is now less than the breadth of the flat portion h or annular land on top of the protrusion c.
  • the plastic deformation of the workpiece progresses generally in conformity with a mechanism similar to the mechanism of compressive working of flat plates.
  • the die d with the protrusion as well as the die a has already begun cutting in the workpiece h.
  • FIG. 4 shows that a product i has been punched off into the lower die by the ejector f being urged downwardly by the breakout punch e which in turn is driven downwardly by a break-out piston (not shown) following the full progress of plate compression.
  • the shearing is accomplished through the four steps of working.
  • the ejector f rises, pushing up the break-out punch e or, alternatively, the ejector f ascends after the break-out punch e has risen up.
  • the: lower die descends and the blank and scrap are taken out. Then, a new workpiece is placed on the upper surface of the lower die, and the operation cycle above described is repeated.
  • the press of the opposing die type according to the present invention accomplishes shearing in an operation cycle of four steps, that is:
  • the press of the present invention has a construction and functions which permit the four process steps above listed to be carried out perfectly and effectively.
  • a hydraulically actuated press of the opposite die type comprises broadly an upper die unit and a lower die unit that cooperate with each other.
  • the lower unit includes a press table that defines the lower limit of a working space in which the cutting operation is performed, said table having a central recess in the top thereof and defining a pressure cylinder chamber therein;
  • a main piston being mounted for vertically slidable movements within said cylinder chamber and having a central depression;
  • an ejector coaxially mounted within said central depression and extending upwardly through the apertures of said main bolster and said lower die member.
  • the upper die unit includes a central apertured upper die member coaxially positioned in a cooperative relationship with said lower die member;
  • said upper die member having an annular protrusion formed integrally therewith on its bottom portion thereof;
  • said upper die member being fixedly mounted to the underside of said floating bolster;
  • a break-out punch coaxially mounted within the apertures of said upper die member, said floating bolster and said press crown and extending downwardly therethrough to operatively cooperate with said ejector.
  • hydraulic means are associated with said ejector and said break-out punch for producing upward and downward pressures thereof;
  • stop means are provided on said upper and lower units to limit said stroke movement.
  • the upper and lower die members are adapted to receive a workpiece therebetween from which a blank is to be cut.
  • the lowermost end of the stroke movement establishes the position of said workpiece for coming into contact with said protrusion of said upper die member and finally cutting off said blank.
  • FIGS. to 8 are sectional views of essential parts of a press embodying the present invention in different states of a blanking cycle.
  • reference number 1 indicates the press housing and numeral 2 indicates the press table that constitutes the lower limit of the working space provided by the press housing.
  • the press table 2 defines a main cylinder 4 therein, and a main piston 5 is vertically slidably inserted in the main cylinder 4.
  • a main bolster 6 is fixedly supported by the main piston 5, and on the main bolster 6 is provided a lower die or die member 7.'
  • the main piston 5 supports an ejector 8 coaxially therewith. Hydraulic oil passes through a passage 11 formed along the axis of the main piston to work against the bottom surface of the ejector 8.
  • An inlet port 9 is formed for the hydraulic oil that works against the bottom surface of the main piston 5.
  • Another inlet 10 is formed for the hydraulic oil that applies hydraulic pressure to the space above a flange 12 of the main piston 5.
  • a stopper 13 is mounted on the piston. A workpiece to be blanked is indicated at 23.
  • the press crown 3 which defines the upper limit of the working space of the press carries a floating bolster 14 coaxially therewith and in such a manner that the bolster can be moved a short distance up and down like a piston as opposed to the main bolster 6. Between the bolster 14 and the press crown 3 there is defined a pressure chamber 18 so that the upper surface of the floating bolster 14 may be kept under hydraulic pressure.
  • An upper die or die member 15 is formed integrally with an annular protrusion from its underside opposite to the lower die 7.
  • a break-out punch 16 is inserted.
  • a piston 17 is provided to move the break-out punch 16 upwardly and downwardly.
  • Ports 20, 21 are provided to admit hydraulic oil into either the upper or lower space around the piston 17.
  • Still another port 19 is formed to supply hydraulic oil to the pressure chamber 18 of the floating bolster 14.
  • the stroke of the break-out piston 17 is limited by a stopper 22.
  • FIG. 5 a workpiece 23 is shown as resting on the lower die 7.
  • the product obtained by the immediately preceding blanking cycle has been forced out of the press together with the scrap by the ejector 8 raised by the hydraulic oil supplied through the passage 11, and the new workpiece to be blanked now lies in position on the lower die.
  • Hydraulic oil passes through the ports 9 and 19 into the cylinder 4 and the pressure chamber 18, respectively, to apply upward and downward pressure on the main piston 5 and the floating bolster 14, with the result that the main piston 5 is raised and the floating bolster 14 is seated at its lowermost end of stroke.
  • FIG. 6 shows that the main piston 5 has risen together with the workpiece 23 so that the workpiece 23 comes into contact with the upper die 15 with the protrusion and lifts the floating bolster 14 in defiance of its depressing force, until the floating assembly is closely contacted and in this way the workpiece 23 is held under a constant pressure between the upper and lower dies.
  • This state corresponds to the state of FIG. 1 which illustrates the operating principles on which the press of the invention is based.
  • plastic deformation is caused in the workpiece sandwiched between the vertically opposing dies 7 and 15, as shown in FIG. 7.
  • a plane of shearing deformation is produced along the material line connecting the tool edge of the lower die 7 and the outer tool edge of the die 15 with the protrusion.
  • cutting-in proceeds chiefly from the tool edge side of the lower die 7. Further, with the decrease of the distance between the upper and lower dies 7 and 15 to a value less than the breadth of the annular top land of the protrusion of the upper die 15 as illustrated in FIG. 3, plastic deformation occurs on the basis of the mechanism of flat compression of plate.
  • the stopper 13 in thread engagement with the main piston comes up into contact with the press table 2 and the main piston is kept from further ascent.
  • the ejector 8 descends relative to the main piston while holding the workpiece 23 under a constant pressure.
  • FIG. 8 shows a blank product separated out into the lower die 7 by the downward movement of the break out punch 16 in continuation of the state above described.
  • hydraulic oil is supplied through the port 20 so that the product 24 is separated out from the rest of workpiece by the break-out punch 16 under the action of the break-out piston 17.
  • This state corre' sponds to that illustrated in FIG. 4.
  • the downward stroke of the break-out punch 16 is not limited by the stopper 22.
  • the press of the invention performs blanking through the operational steps above explained. Then, the hydraulic oil is drained through the ports 9 and 20, while supplying hydraulic oil through the ports 10 and 21. This lowers the main cylinder 5 and, at the same time, raises the break-out punch 16 away from the product 24. Meanwhile, the ejector 8 ascends to push the product out of the lower die 7, and the product 24 is taken out of the press, thus completing one cycle of blanking operation.
  • the press of opposing die type holds the workpiece under pressure between the upper and lower dies, causes plastic deformation in the workpiece on the basis of the mechanism of cutting and the mechanism of compression, and finally cuts off the blank by the break-out punch to obtain a product of desired shape.
  • the bolster provided in the press crown gives enough force to the upper die to hold the workpiece under pressure.
  • the bolster is required to be freely movable in the axial direction over some distance of its stroke.
  • the bolster can be moved upwardly or downwardly about 2 millimeters by supplying hydraulic oil to the pressure chamber thereover thereby producing a depressing force.
  • an an nular plate spring or the like may be used in the pressure chamber to achieve a similar effect.
  • the hydraulically operated break-out piston as used in the embodiment above described may be replaced by a spring having the required stretchability or an elastic material such as rubber.
  • the arrangement of the embodiment shown may be reversed so that the die formed with the protrusion is associated with the main bolster and the other die is attached to the floating bolster. It is further possible to allow the ejector punch 8 to do the breaking out and allow the break-out punch 16 to push out the product.
  • the press of the invention represents a substantial contribution to the field of fine press working of parts.
  • a hydraulically actuated press of the opposite die type comprising in combination:
  • a lower unit including a press table that defines the lower limit of a working space in which cutting is performed, said table having a central recess in the top thereof and defining a pressure cylinder chamber therein;
  • a main piston being mounted for vertically slidable movements within said cylinder chamber and having a central depression;
  • an ejector coaxially mounted within said central depression and extending upwardly through the apertures of said main bolster and said lower die member;
  • an upper unit including a central apertured upper die member coaxially positioned in a cooperative relationship with said lower die member;
  • said upper die member having an annular protrusion formed integrally therewith on its bottom portion thereof;
  • said upper die member being fixedly mounted to the underside of said floating bolster;
  • stop means on said upper and low-er units to limit said stroke movement
  • said upper and lower die members adapted to receive a workpiece therebetween from which a blank is to be cut;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00144082A 1970-05-29 1971-05-17 Shearing press of opposing die type Expired - Lifetime US3739669A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4646470 1970-05-29

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US3739669A true US3739669A (en) 1973-06-19

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US00144082A Expired - Lifetime US3739669A (en) 1970-05-29 1971-05-17 Shearing press of opposing die type

Country Status (8)

Country Link
US (1) US3739669A (de)
BE (1) BE767675A (de)
CH (1) CH538339A (de)
DE (2) DE2127495A1 (de)
FR (1) FR2096767B1 (de)
GB (1) GB1359214A (de)
NL (1) NL164768C (de)
SE (1) SE386385B (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3878746A (en) * 1972-12-22 1975-04-22 Ibm Burless blanking machine and process
US4611483A (en) * 1983-06-28 1986-09-16 Repco Limited Press and method of making same
US4774865A (en) * 1987-09-22 1988-10-04 Wallis Bernard J Die stamping system
US4866976A (en) * 1985-12-13 1989-09-19 Aatec Assembling-Automations Technik Gmbh Apparatus for the metal working of components
US4934230A (en) * 1988-08-24 1990-06-19 Wallis Bernard J Die stamping system
US5177843A (en) * 1991-12-16 1993-01-12 Amada Company, Ltd. Turret punch press
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
US5413018A (en) * 1991-06-20 1995-05-09 Fuji Electric Co., Ltd. Piezo-electric actuator operated press
US5702556A (en) * 1993-02-23 1997-12-30 Minnesota Mining And Manufacturing Company Method and apparatus for producing a laminated viscoelastic product
US6041639A (en) * 1999-02-09 2000-03-28 The Boeing Company Method and apparatus for stretch-forming and shearing sheet metal
US6125527A (en) * 1997-09-04 2000-10-03 Feintool International Holding Process for producing precise cut surfaces
US6401510B1 (en) 1999-04-07 2002-06-11 3M Innovative Properties Company Method for stamping a part from a multi-layered strip
US6408726B1 (en) * 1995-12-14 2002-06-25 Lillbacka Jetair Oy Sheet metal work center with a movable lower die operative as a stopper and an upwards forming tool
US20050050935A1 (en) * 2002-11-20 2005-03-10 Hideyuki Miyahara Shearing method for thin plate
US20060277961A1 (en) * 2004-10-13 2006-12-14 Hideyuki Miyahara Shearing method for thin plate
US20070144230A1 (en) * 2004-04-09 2007-06-28 Shiro Fujimura Shearing device
US20100095815A1 (en) * 2008-10-20 2010-04-22 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Discharging Workpiece Parts
CN103658314A (zh) * 2012-09-18 2014-03-26 上海强精金属制品有限公司 一种无毛刺冲孔模具系统
US20160207125A1 (en) * 2014-01-21 2016-07-21 Thyssenkrupp Steel Europe Ag Tool and method for shear cutting a workpiece
CN105921594A (zh) * 2016-05-17 2016-09-07 中机精冲科技（福建）有限公司 一种优化设计的小搭边大厚度光洁精冲模具
US20170008186A1 (en) * 2015-07-06 2017-01-12 Feintool International Holding Ag Apparatus and method for stripping away/pushing out a punched grid/internally formed part and ejecting a blanked part in a precision blanking press

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU194077B (en) * 1984-03-27 1988-01-28 Elektroakusztikai Gyar Die for simultaneous fine shearing internal and external outlines
FR2659035A1 (fr) * 1990-03-01 1991-09-06 A2C Groupe Pratic Ademva Procede de decoupage de pieces metalliques et moyens pour sa mise en óoeuvre.
FR2751570B1 (fr) * 1996-07-25 1998-09-04 Lorraine Laminage Procede de decoupage d'une piece dans un flan de tole
FR2751571B1 (fr) * 1996-07-25 1999-10-22 Lorraine Laminage Procede de decoupage d'une piece dans un flan de tole
FR2803781B1 (fr) * 2000-01-18 2002-03-08 Emt 74 Procede et dispositif de decoupage sur presse
DE10030882A1 (de) * 2000-06-23 2002-01-03 Prometall Werkzeugbau Gmbh Präzisionsschneidverfahren und Vorrichtung
PT2042249E (pt) 2007-09-26 2010-06-07 Feintool Ip Ag Processo e dispositivo para fabrico de peças estampadas com grande superfície funcional e de corte bastante lisa
CN103481328B (zh) * 2013-09-17 2016-02-03 四川辉达管业科技有限公司 线盒冲孔机
DE102019129787A1 (de) * 2019-11-05 2021-05-06 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Werkzeug und Verfahren zum Bearbeiten von plattenförmigen Werkstücken, insbesondere von Blechen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119292A (en) * 1960-03-03 1964-01-28 Almatic A G Hydraulically controlled punch press
US3211034A (en) * 1959-09-02 1965-10-12 Kienzle Apparate Gmbh Die arrangement
US3554065A (en) * 1967-06-05 1971-01-12 Feintool Ag Precision cutting punching tool for precision punching of parts
US3564959A (en) * 1968-11-29 1971-02-23 Aida Tekkosho Kk Fine blanking press
US3583266A (en) * 1968-04-11 1971-06-08 Kazuyoshi Kondo Shearing process
US3640167A (en) * 1969-06-14 1972-02-08 Lorenz Maschf Punching apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211034A (en) * 1959-09-02 1965-10-12 Kienzle Apparate Gmbh Die arrangement
US3119292A (en) * 1960-03-03 1964-01-28 Almatic A G Hydraulically controlled punch press
US3554065A (en) * 1967-06-05 1971-01-12 Feintool Ag Precision cutting punching tool for precision punching of parts
US3583266A (en) * 1968-04-11 1971-06-08 Kazuyoshi Kondo Shearing process
US3564959A (en) * 1968-11-29 1971-02-23 Aida Tekkosho Kk Fine blanking press
US3640167A (en) * 1969-06-14 1972-02-08 Lorenz Maschf Punching apparatus

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3878746A (en) * 1972-12-22 1975-04-22 Ibm Burless blanking machine and process
US4611483A (en) * 1983-06-28 1986-09-16 Repco Limited Press and method of making same
US4866976A (en) * 1985-12-13 1989-09-19 Aatec Assembling-Automations Technik Gmbh Apparatus for the metal working of components
US4774865A (en) * 1987-09-22 1988-10-04 Wallis Bernard J Die stamping system
US4934230A (en) * 1988-08-24 1990-06-19 Wallis Bernard J Die stamping system
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
US5413018A (en) * 1991-06-20 1995-05-09 Fuji Electric Co., Ltd. Piezo-electric actuator operated press
US5177843A (en) * 1991-12-16 1993-01-12 Amada Company, Ltd. Turret punch press
US5702556A (en) * 1993-02-23 1997-12-30 Minnesota Mining And Manufacturing Company Method and apparatus for producing a laminated viscoelastic product
US6408726B1 (en) * 1995-12-14 2002-06-25 Lillbacka Jetair Oy Sheet metal work center with a movable lower die operative as a stopper and an upwards forming tool
US6125527A (en) * 1997-09-04 2000-10-03 Feintool International Holding Process for producing precise cut surfaces
US6041639A (en) * 1999-02-09 2000-03-28 The Boeing Company Method and apparatus for stretch-forming and shearing sheet metal
US6401510B1 (en) 1999-04-07 2002-06-11 3M Innovative Properties Company Method for stamping a part from a multi-layered strip
US7107808B2 (en) * 2002-11-20 2006-09-19 Nakamura Seisakusho Kabushikigaisha Shearing method for thin plate
US20050050935A1 (en) * 2002-11-20 2005-03-10 Hideyuki Miyahara Shearing method for thin plate
US8166854B2 (en) * 2004-04-09 2012-05-01 Toyota Boshoku Kabushiki Kaisha Shearing device
US20070144230A1 (en) * 2004-04-09 2007-06-28 Shiro Fujimura Shearing device
US20060277961A1 (en) * 2004-10-13 2006-12-14 Hideyuki Miyahara Shearing method for thin plate
US7464575B2 (en) * 2004-10-13 2008-12-16 Nakamura Seisakusho Kabushikigaisha Shearing method for thin plate
US8499668B2 (en) 2008-10-20 2013-08-06 TRIUMPF Werkzeugmaschinen GmbH + Co. KG Discharging workpiece parts
US20100095815A1 (en) * 2008-10-20 2010-04-22 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Discharging Workpiece Parts
CN103658314A (zh) * 2012-09-18 2014-03-26 上海强精金属制品有限公司 一种无毛刺冲孔模具系统
US20160207125A1 (en) * 2014-01-21 2016-07-21 Thyssenkrupp Steel Europe Ag Tool and method for shear cutting a workpiece
US9908187B2 (en) * 2014-01-21 2018-03-06 Thyssenkrupp Steel Europe Ag Tool and method for shear cutting a workpiece
US20170008186A1 (en) * 2015-07-06 2017-01-12 Feintool International Holding Ag Apparatus and method for stripping away/pushing out a punched grid/internally formed part and ejecting a blanked part in a precision blanking press
KR20170005769A (ko) * 2015-07-06 2017-01-16 페인툴 인터내셔널 홀딩 에이쥐 정밀한 블랭킹 프레스에서 타발된 그리드/내부적으로 형성된 부품을 벗겨 제거하고/밀어내며 블랭킹된 부품을 방출하는 장치 및 방법
US10682782B2 (en) * 2015-07-06 2020-06-16 Feintool International Holding Ag Apparatus and method for stripping away/pushing out a punched grid/internally formed part and ejecting a blanked part in a precision blanking press
CN105921594A (zh) * 2016-05-17 2016-09-07 中机精冲科技（福建）有限公司 一种优化设计的小搭边大厚度光洁精冲模具

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Publication number Publication date
BE767675A (fr) 1971-10-18
DE2127495A1 (de) 1971-12-09
CH538339A (de) 1973-06-30
NL164768B (nl) 1980-09-15
SE386385B (sv) 1976-08-09
NL164768C (nl) 1981-02-16
GB1359214A (en) 1974-07-10
FR2096767A1 (de) 1972-02-25
FR2096767B1 (de) 1974-04-05
DE2166221A1 (de) 1973-05-10
DE2166221B2 (de) 1974-05-30
NL7107465A (de) 1971-12-01
DE2166221C3 (de) 1975-03-27

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