US3926033A - Toggle-joint press - Google Patents

Toggle-joint press Download PDF

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Publication number
US3926033A
US3926033A US544816*A US54481675A US3926033A US 3926033 A US3926033 A US 3926033A US 54481675 A US54481675 A US 54481675A US 3926033 A US3926033 A US 3926033A
Authority
US
United States
Prior art keywords
piston
toggle
joint
tool
holding
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
US544816*A
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English (en)
Inventor
Gaston Forichon
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Application granted granted Critical
Publication of US3926033A publication Critical patent/US3926033A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/16—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by fluid-pressure means

Definitions

  • y P v Jun 1974 France 7403670 casing, cutting and other stamping OPfH'LIUOI'IS is characterized by a control piston comprising two coaxial 52 Cl. 72 4 72/453; 100/272 and relatively moveable piston parts arranged within a 51 Int. Ci.
  • the present invention relates generally to a togglejoint press, and more particularly to pneumatic togglepoint presses which are used for bending encasing, cutting and various other stamping operations.
  • Toggle-joint presses of known design generally consist of a sealed cylinder in which a piston is moved in linear translation by a pressurized fluid, such as, for example, air.
  • a pressurized fluid such as, for example, air.
  • This linearly moveable piston transmits its thrust to a toggle-joint mechanism which operates to amplify and retransmit the thrust to a tool-holding piston.
  • the retraction of the tool-holding piston after completion of the operation, is effected by the compressed air which is always admitted to the return side of the toggle-joint control piston.
  • Another object of this invention is to provide a toggle-joint press having improved rate of output characteristics.
  • Yet another object of the invention is to provide a highly efficient fluid operated toggle-joint press which is fully reliable in operation.
  • a toggle-joint press having a cylinder in which at least one control piston is moveable, the control piston being tied by a connecting rod to the knee of a toggle-joint formed by at least two rods, one being'hinged at a fixed point and the other being hinged to a tool-holding piston.
  • the control piston consists of two coaxial parts, being relatively movable with respect to one another, and the cylinder is provided with means for blocking, and thus limiting, the travel of one of the relatively moveable coaxial parts, while the other part continues in its motion to return the tool-holding piston to its raised position.
  • the two coaxial pistons, or moveable piston parts have a pressurized supply of fluid which automatically drives them as a unit during the descent of the tool-holding piston, until an outer one of the pistons is stopped by a shoulder of the cylinder, after which an inner one of the pistons continues moving to return the tool-holding piston to its raised position.
  • FIG. 1 is a schematic view of a press formed according to this invention and showing the tool-holding piston in its raised position and the control piston being disposed in a rightward-most position;
  • FIG. 2 is a schematic view of the press shown in FIG. 1, but illustrating the tool-holding piston in its lowered operative position and the control piston being disposed in a leftward-most position;
  • FIG. 3 is a schematic view of the press shown in FIGS. 1 and 2 with the tool-holding piston being in a raised position, but with the toggle assembly being articulated oppositely as shown in FIG. 1;
  • FIG. 4 is a schematic view of another embodiment of the present invention, wherein a pair of joined, control pistons are employed.
  • FIGS. 1-3 there is shown a pneumatically operated toggle-joint press, which obviously could be operated by a suitable liquid just as well, such as, for example, oil.
  • This press consists essentially of six elements, namely, a base or stand 1, a housing 2 supported on the base, a cylinder 3 connected to the housing 2 and having a control piston 4 movably disposed therein, a system of rods generally designated by reference numeral 5 and a tool-holding piston 6 movably disposed in the housing 2.
  • the cylinder 3 is attached to the housing 2 in a known manner and is isolated therefrom in an airtight manner by a partition 7, one side thereof forming a shoulder within the cylinder, with a chamber 8 of the cylinder 3 being bounded at its axial ends by an end face 9 of the cylinder and the shoulder of the partition 7, and being supplied at its two ends with a pressurized fluid through passages 10 and 11.
  • the control piston 4 moveably disposed in cylinder 3 has a head portion 4a provided with a driving face 4b and a return face 40 on opposing surfaces thereof. The piston thus moves in one axial direction or the other within cylinder 3 depending upon whether the pressurized fluid enters the'chamber 8 through the passage 10 or through the passage 11.
  • the control piston which heretofore has been constructed as a solid piece, is now made in tubular fashion and in and of itself serves as the cylinder for a smaller diameter coaxial piston 12, such that the two pistons 4 and 12 are moveable relative to one another and thus are capable of simultaneous or successive displacements.
  • the outer piston 4 is provided with a portion 13 projecting radially inwardly into the axial bore 14 thereof substantially intermediate its length which serves as an annular shoulder 13 within the axial bore 14, separating the bore 14 into two independent chambers 15 and 16.
  • the inner piston 12 has an intermediate shaft portion 12a which slides in the constriction formed in the axial bore 14 by the annular shoulder 13, and the opposing ends of the shaft portion 12a of inner piston 12 are provided with enlarged piston heads 17 and 18.
  • the head 18 moves within the chamber 16 on one side of the shoulder 13, while the head 17 slides back and forth in the chamber 15 formed on the other side of the shoulder.
  • the head 17 is connected by a rod 19 to the toggle joint 5, which consists in the illustrated embodiment of two links a and 5b, being articulated at a common axis 20 and being connected at their respective other ends to a fixed point 21 to be further described herein and to a fixed point on the moveable tool-holding piston 6.
  • the link 5a hinged at 21, is connected to a regulating screw 22 threadably engaged within housing 2 to permit varying the lower dead point of the tool-holding piston 6 without changing the stroke of the press, so that the force may be regulated.
  • the link 5b is connected to the tool-holding piston 6 at an axis of articulation 23 and this piston is vertically moveable, being driven by the toggle-joint mechanism.
  • each of the two chambers and 16, within which the inner piston heads 17 and 18 of the inner piston move is connected with the chamber 8 in which the head 4a of the outer piston 4 moves.
  • This is effected, as shown best in FIG. 2, by a passage 24, formed in the outer piston head 4a and through which chamber 15 communicates with chamber 8 on the driving face 4b side of the outer piston 4, while the chamber 16 communicates with the chamber 8 on the return face 4c side of the outer piston 4 through another passage 25 also formed in the outer piston head 4a.
  • FIG. 1 shows the press in its raised position and ready to work
  • the outer control piston 4 is in its most rightward position, as illustrated, being stopped against the end 9 of its cylinder 3
  • the inner piston 12 is likewise in its most rightward position, being stopped with its head 17 against the annular shoulder 13 of the outer piston.
  • the links 5a and 5b are separated by an angle of less than 180 and that the tool-holding piston 6 is in its upper or raised position.
  • pressurized fluid is seen to be fed through the line 26 leading through the passage 10 to the return side of the chamber 8 thereby retaining the outer piston 4 in the position shown, while the line 27 connected to passage 11 opening from the side of chamber 8 contacting the face 4b of the piston 4 is connected to a reservoir.
  • the line 26 may be connected instead to the reservoir, while pressure is then applied in line 27, whereby the two inner and outer pistons 12 and 14, respectively, move leftwardly together as a unit until the face 4c of piston 4 is stopped against the partition 7 closing the cylinder.
  • the links 50 and 5b are vertically aligned and the tool-holding piston 6 is in the working or pressing position.
  • a cylinder 3 is designed to accept notjust a single control piston, but two identical pistons 4 spaced apart and fixedly joined by a common or internal rod therebetween.
  • these pistons 4 likewise serveas cylinders for auxiliary pistons 12 which are joined by two like connecting rods 19' to a unique toggle-joint 5' consisting of two links 50 and 5b, being articulated at a common axis 20' and being connected at their respective other ends to a fixed point 21' of a regulating screw 22' and to a fixed point on the moveable tool-holding piston 6.
  • a fluid-driven toggle-joint press of the type comprising a cylinder having a control piston means moveable therein which is joined by a connecting rod to the knee of a toggle joint formed by at least two links, one link being hinged at a fixed point and the other at the end of a tool-holding piston, the press being characterized by the improvement comprising:
  • control piston means being formed of two relatively moveable coaxial pistons
  • a togglejoint press as set forth in cllaim 3 wherein said one piston moveable in the other includes a piston rod slidable in the means forming said shoulder and two piston heads at opposite ends of said piston rod being disposed respectively in said two chambers.
  • a toggle-joint press comprising:
  • a tool-holding piston being moveable along a given line in said housing between an operative and a return position
  • a first piston moveably disposed axially in said cylinder and having an elongate axial opening formed therein, and means in said opening to define a pair of oppositely facing stops;
  • control means for supplying pressurized fluid to said cylinder selectively to the ends thereof for causing said first piston to move axially therein;
  • a second piston moveably disposed axially in said opening and having a pair of piston heads at the ends thereof
  • a first one of said piston heads being engageable by a first one of said stops for causing said second piston to move simultaneously with said first piston when said first piston moves in one direction and for limiting the travel of said second piston in the other direction independently of said first piston
  • the second one of said piston heads being engageable by the second one of said stops for causing said second piston to move simultaneously with said first piston when said first piston moves in the other direction and for limiting the travel of said second piston in said one direction independently of said first piston, said second piston thereby having a longer path of linear translation than said first piston
  • conduit means connecting said cylinder on opposite sides of said first piston moveable therein to said opening in said first piston;
  • a toggle-joint composed of two links connected at one end thereof in a knee joint, with the other end of one link being hingedly fixed within said housing and the other end of the other link being hingedly connected to one end of said tool-holding piston;
  • At least one connecting rod being hingedly connected at one end to said knee joint and at its other end to one of said piston heads of said second piston;
  • Atoggle-joint press as set forth in claim 7, wherein said stops are formed by an internal annular shoulder formed in said axial opening.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
US544816*A 1974-01-28 1975-01-28 Toggle-joint press Expired - Lifetime US3926033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7402670A FR2258951B1 (fr) 1974-01-28 1974-01-28

Publications (1)

Publication Number Publication Date
US3926033A true US3926033A (en) 1975-12-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
US544816*A Expired - Lifetime US3926033A (en) 1974-01-28 1975-01-28 Toggle-joint press

Country Status (4)

Country Link
US (1) US3926033A (fr)
DE (1) DE2503458B2 (fr)
FR (1) FR2258951B1 (fr)
IT (1) IT1027380B (fr)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133260A (en) * 1976-10-15 1979-01-09 Packaging Industries, Inc. Shut height adjustment mechanism
US4159634A (en) * 1978-05-19 1979-07-03 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Toggle mechanism for pinching metal tubes
US4190485A (en) * 1976-11-05 1980-02-26 Sumitomo Electric Industries, Ltd. Method of welding a thermoshrinkable sheet and a device for use in the method
US4303012A (en) * 1978-08-26 1981-12-01 Mcglennon Gordon L Load multiplying mechanisms
US4393684A (en) * 1981-02-12 1983-07-19 Penn Engineering & Manufacturing Corp. Press having a linkage mechanism connectable and disconnectable from a ram
US4398456A (en) * 1981-08-12 1983-08-16 Prater Larry P Machine for converting returnable cans into metal ingots
US4729300A (en) * 1985-09-04 1988-03-08 Fa. Theodor Grabener Pressensysteme GmbH & Co. KG Press cushion for a mechanical press
US4850272A (en) * 1986-06-20 1989-07-25 E. Bruderer Maschinenfabrik Ag Articulated-lever cutting and forming press
US4916932A (en) * 1988-06-09 1990-04-17 Lamb Robo, Inc. Force multiplying press
US4934173A (en) * 1989-03-17 1990-06-19 Amp Incorporated Stamping and forming machine having toggles for reciprocating the tooling assemblies
US5251502A (en) * 1992-06-09 1993-10-12 Savair Inc. Sequential pivot pin multiplier
DE4303017A1 (de) * 1993-02-03 1994-08-04 Thomas Stumpp Kniehebelpresse
US6138346A (en) * 1998-12-21 2000-10-31 Connectool Inc. Portable hand-held battery-powered crimping tool
DE10255051A1 (de) * 2002-11-26 2004-06-17 Dickes, Klaus Stanzantrieb für eine Stanz- oder Umformpresse
US6810767B1 (en) * 2002-07-22 2004-11-02 Aerospace Systems & Components, Inc. Floating roller lock
US20060292970A1 (en) * 2005-06-23 2006-12-28 Poly-Clip System Gmbh & Co. Kg Clip machine
US20090064750A1 (en) * 2005-10-12 2009-03-12 Wolfgang Denker Device for Adapting Working Rolls to a Rolling Line
CN103042707A (zh) * 2012-12-18 2013-04-17 河海大学常州校区 机械液压混合驱动压力机
CN103057141A (zh) * 2012-12-18 2013-04-24 河海大学常州校区 一种肘杆液压机
CN103890464A (zh) * 2011-10-14 2014-06-25 株式会社理研 组合式控油环
CN106217923A (zh) * 2016-08-31 2016-12-14 浙江天成自控股份有限公司 工件的气动夹紧装置
CN113134526A (zh) * 2021-04-26 2021-07-20 江苏扬力数控机床有限公司 一种数控折弯中心板料夹紧机构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486450A1 (fr) * 1980-07-08 1982-01-15 Forichon Gaston Dispositif de commande et de pilotage pour presse a genouilleres
CN106493228A (zh) * 2016-11-03 2017-03-15 成都聚智工业设计有限公司 一种小型冲压模具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1179919A (en) * 1914-05-19 1916-04-18 Nat Tube Co Pipe-rounding mechanism.
US3488990A (en) * 1967-02-27 1970-01-13 Boniard I Brown High energy rate forming machine
US3518869A (en) * 1967-03-30 1970-07-07 Gaston Sebastien Forichon Hydraulic press,more particularly for treating metals by shaping
US3620067A (en) * 1968-09-18 1971-11-16 Davy & United Eng Co Ltd Article shaping or forming machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1179919A (en) * 1914-05-19 1916-04-18 Nat Tube Co Pipe-rounding mechanism.
US3488990A (en) * 1967-02-27 1970-01-13 Boniard I Brown High energy rate forming machine
US3518869A (en) * 1967-03-30 1970-07-07 Gaston Sebastien Forichon Hydraulic press,more particularly for treating metals by shaping
US3620067A (en) * 1968-09-18 1971-11-16 Davy & United Eng Co Ltd Article shaping or forming machines

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133260A (en) * 1976-10-15 1979-01-09 Packaging Industries, Inc. Shut height adjustment mechanism
US4190485A (en) * 1976-11-05 1980-02-26 Sumitomo Electric Industries, Ltd. Method of welding a thermoshrinkable sheet and a device for use in the method
US4159634A (en) * 1978-05-19 1979-07-03 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Toggle mechanism for pinching metal tubes
US4303012A (en) * 1978-08-26 1981-12-01 Mcglennon Gordon L Load multiplying mechanisms
US4393684A (en) * 1981-02-12 1983-07-19 Penn Engineering & Manufacturing Corp. Press having a linkage mechanism connectable and disconnectable from a ram
US4398456A (en) * 1981-08-12 1983-08-16 Prater Larry P Machine for converting returnable cans into metal ingots
US4729300A (en) * 1985-09-04 1988-03-08 Fa. Theodor Grabener Pressensysteme GmbH & Co. KG Press cushion for a mechanical press
US4850272A (en) * 1986-06-20 1989-07-25 E. Bruderer Maschinenfabrik Ag Articulated-lever cutting and forming press
US4916932A (en) * 1988-06-09 1990-04-17 Lamb Robo, Inc. Force multiplying press
US4934173A (en) * 1989-03-17 1990-06-19 Amp Incorporated Stamping and forming machine having toggles for reciprocating the tooling assemblies
JP2907223B2 (ja) 1989-03-17 1999-06-21 アンプ インコーポレーテッド 打抜き形成装置
US5251502A (en) * 1992-06-09 1993-10-12 Savair Inc. Sequential pivot pin multiplier
DE4303017A1 (de) * 1993-02-03 1994-08-04 Thomas Stumpp Kniehebelpresse
US6138346A (en) * 1998-12-21 2000-10-31 Connectool Inc. Portable hand-held battery-powered crimping tool
US6810767B1 (en) * 2002-07-22 2004-11-02 Aerospace Systems & Components, Inc. Floating roller lock
DE10255051A1 (de) * 2002-11-26 2004-06-17 Dickes, Klaus Stanzantrieb für eine Stanz- oder Umformpresse
US20060292970A1 (en) * 2005-06-23 2006-12-28 Poly-Clip System Gmbh & Co. Kg Clip machine
US7451582B2 (en) * 2005-06-23 2008-11-18 Poly-Clip System Gmbh & Co. Kg Clip machine
US20090064750A1 (en) * 2005-10-12 2009-03-12 Wolfgang Denker Device for Adapting Working Rolls to a Rolling Line
US7784321B2 (en) * 2005-10-12 2010-08-31 Sms Siemag Aktiengesellschaft Device for adapting working rolls to a rolling line
CN103890464A (zh) * 2011-10-14 2014-06-25 株式会社理研 组合式控油环
CN103890464B (zh) * 2011-10-14 2016-09-14 株式会社理研 组合式控油环
CN103042707A (zh) * 2012-12-18 2013-04-17 河海大学常州校区 机械液压混合驱动压力机
CN103057141A (zh) * 2012-12-18 2013-04-24 河海大学常州校区 一种肘杆液压机
CN103042707B (zh) * 2012-12-18 2015-08-12 河海大学常州校区 机械液压混合驱动压力机
CN103057141B (zh) * 2012-12-18 2015-10-07 河海大学常州校区 一种肘杆液压机
CN106217923A (zh) * 2016-08-31 2016-12-14 浙江天成自控股份有限公司 工件的气动夹紧装置
CN113134526A (zh) * 2021-04-26 2021-07-20 江苏扬力数控机床有限公司 一种数控折弯中心板料夹紧机构

Also Published As

Publication number Publication date
IT1027380B (it) 1978-11-20
FR2258951B1 (fr) 1977-03-04
DE2503458B2 (de) 1976-09-09
FR2258951A1 (fr) 1975-08-22
DE2503458A1 (de) 1975-07-31

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