US3222913A - Toggle press - Google Patents

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Publication number
US3222913A
US3222913A US309610A US30961063A US3222913A US 3222913 A US3222913 A US 3222913A US 309610 A US309610 A US 309610A US 30961063 A US30961063 A US 30961063A US 3222913 A US3222913 A US 3222913A
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US
United States
Prior art keywords
toggle
plunger
lever
support
toggle linkage
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
US309610A
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English (en)
Inventor
Leopold Otto
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3222913A publication Critical patent/US3222913A/en
Anticipated expiration legal-status Critical
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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/16—Drives for riveting machines; Transmission means therefor
    • B21J15/18—Drives for riveting machines; Transmission means therefor operated by air pressure or other gas pressure, e.g. explosion pressure
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • 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
    • B21D28/002—Drive of the tools
    • 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
    • B21D28/20—Applications of drives for reducing noise or wear
    • 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
    • B30B1/02—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 lever mechanism
    • B30B1/08—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 lever mechanism operated by fluid-pressure means
    • 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
    • B30B1/12—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 hand or foot
    • 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

  • the present invention relates to a toggle press, i.e., a press in which the plunger or ram is moved by means of a toggle linkage.
  • an object of the present invention to provide what is basically a manually operated toggle .press which is so constructed that even a small operating force will produce a constant, and adjustable, pressure exerted by the ram in its end position and with this object in view, the present invention resides mainly in a press in which the idler or no-load movement of the plunger, necessary for allowing inserting and placing of the Work piece, is effected by means of a toggle linkage, which may be hand-operated, whereas the actual work stroke is effected automatically by means of a fluid pressure drive, the latter acting on the plunger with a substantial mechanical advantage.
  • a toggle press which comprises a support, a plunger movably mounted on the support, a toggle linkage interposed between the support and the plunger for moving the latter from an inoperative position to a position just short of its operative position which corresponds to a position of the toggle linkage which is just short of its dead center position, fluid pressure means interposed between the support and the toggle linkage for moving the latter with respect to the support, which fluid pressure means act on the toggle linkage with a substantial mechanical advantage, and means operatively associated with the toggle linkage for actuating the fluid pressure means when the linkage is just short of its dead center position, thereby to cause the fluid pressure means to move the toggle linkage while the same is in its dead center position, and, through the intermediary of the dead center toggle linkage, to move the plunger from just short of its operative position to its final operative position.
  • FIGURE 1 is a longitudinal sectional view of a toggle press according to the present invention, taken substantially on line 1-1 of FIGURE 2.
  • FIGURE 2 is a horizontal sectional view taken substantially on line 22 of FIGURE 1.
  • the press comprises a main support 1 of which only the upper part, which carries the ram or plunger 5 and the moving means associated therewith, is shown.
  • the lower part of the support 1 which carries the stationary platen or die cooperating with the plunger head 5a is conventional and therefore not illustrated.
  • the top of the support 1 carries two eccentric sleeves 2 which are freely rotatable with respect to the support 1 and which are connected to each other via a lever 7 which comprises two arms 7a connected together by a pin 7b, the arms 7a being non-rotatably connected to the sleeves 2, respectively.
  • the sleeves 2 serve as a rotatable bearing for a shaft 4; due to the eccentricity of the sleeves, the axis of shaft 4 is spaced from the axis about which the sleeves 2 rotate with respect to the support 1.
  • a hand lever 3 is non-rotatably connected to the shaft 4 by means of a set screw 3a.
  • the hand lever 3 is connected to the plunger 5 by means of a toggle link 6 which is pivotally connected to the lever 3 by means of a pin 26 and to the plunger by means of a further pin 21.
  • the lever 3 is provided with an operating handle 3b by means of which the lever 3 can be pivoted about the axis of shaft 4, thereby to operate the toggle linkage.
  • lever 7 is pivotally connected to a compressed air drive 8 comprising a cylinder which is pivotally attached to the support 1, a cylinder cover 12a which closes off the upper end of the cylinder 12, a piston 13 which is slidably arranged in the cylinder, a piston rod 13a which is connected to the piston 13, which passes through the cover 12a, and which is pivotally connected to pin 71) interconnecting the two arms 7a, a buffer sleeve 14, and a return spring 15 interposed between the piston 13 and the cylinder cover 12a.
  • a compressed air drive 8 comprising a cylinder which is pivotally attached to the support 1, a cylinder cover 12a which closes off the upper end of the cylinder 12, a piston 13 which is slidably arranged in the cylinder, a piston rod 13a which is connected to the piston 13, which passes through the cover 12a, and which is pivotally connected to pin 71) interconnecting the two arms 7a, a buffer sleeve 14, and a return spring 15 interposed between the piston
  • the cylinder 12 is in communication, via the pivotal mount which attaches the cylinder to the housing 1, with a control valve 9 which serves to establish, via conduit means 9a, communication between the interior of the cylinder and a suitable source of fluid pressure, the latter being shown schematically only.
  • the valve 9 also serves to vent the interior of the cylinder 12, the arrangement being such that when the valve 9 blocks the passage of compressed air from the source of pressure fluid, it places the interior of cylinder 12 in communication with the atmosphere, whereas this communication with atmosphere is closed when the valve 9 is in a position in which the interior of the cylinder 12 is in communication with the source of compressed air.
  • the valve 9 has a control rod 11, the latter being actuated by a valve actuator lever 10 which is nonrotatably mounted on the shaft 4 by means of a set screw 10a.
  • a stationary abutment 16 which cooperates with a stop surface 30 of lever 3.
  • the toggle press operates as follows:
  • FIGURE 1 shows the starting position of the parts.
  • the lever 3 In order to operate the press, the lever 3 is pivoted in clockwise direction until the toggle link 6 is close to its dead center position. During this rotation, the plunger 5 goes through an idle or no-load stroke, represented by the distance a and reaches a position just short of its final operative position.
  • the valve actuator lever 10 will engage the right-hand end of the valve control rod 11, thereby opening the valve 9. This will result in compressed air being fed into the cylinder 12.
  • the piston 13 will then be driven upwardly and rotate the lever 7 in clockwise direction; this will cause the sleeves 2, and with them the eccentrically positioned shaft 4, to be rotated about the axis of the sleeves 2.
  • the shaft 4, and with it the now dead center toggle linkage, and through the intermediary thereof, the plunger 5, will then be moved downwardly throughout the distance b, which represents the actual work stroke of the plunger.
  • the toggle link 6, which is in its dead center position, will act as a rigid coupling between the shaft 4 and the plunger 5, so that during its work stroke b, the plunger is moved exclusively under the influence of the drive 8.
  • lever 7 and eccentric sleeve 2 coact to form a bell crank lever whose axis is that of the sleeves 2; the lever arm with which the drive 8 acts will be the distance between the axis of pin 7b and the axis of sleeves 2, while the lever arm acting on the plunger will be the distance between the axis of sleeves 2 and the axis of the shaft 4.
  • the lever ratio will, in practice, he of the order of approximately 10 to 1, so that the drive 8 will act on the toggle linkage with a substantial mechanical advantage.
  • the force which the plunger exerts at the end of the work stroke can be varied by adjusting the air pressure at which the drive 8 is operated; this can, in practice, be accomplished by means of a pressure reduction valve.
  • the lever 3 Upon completion of the operation, the lever 3 is pivoted in counterclockwise direction.
  • the valve actuator lever 10 will immediately disengage itself from the right-hand end of the valve control rod 11, so that the valve 9 will be closed and the cylinder 12 be vented.
  • the return spring 15 brings the parts of the drive 8 back to their starting position.
  • the full length of the available work stroke b need not always be used; in practice, only part of the stroke will be used during stamping and riveting operations, although the full Work stroke might be used during other types of operations, e.g., die punching. Consequently, only very small quantities of compressed air will be used despite the large pressure which is exerted by the plunger 5 at the end of the useful work stroke.
  • One major advantage of the present invention is that the pressure which the plunger exerts at the end of the stroke can be made to be substantially higher than was heretofore the case with simple, low-cost presses.
  • the lever 3 can be operated automatically, for example, by means of a suitable compressed air drive which, since the same will not be called upon to operate durni g the actual work stroke, can be quite small.
  • This additional compressed air drive is shown schematically only at 30.
  • a toggle press comprising, in combination:
  • a toggle press as defined in claim 1 wherein said toggle linkage comprises a lever rotata-bly mounted on said support, a toggle link pivotally connected to said lever and to said plunger, and means for rotating said lever.
  • a toggle press as defined in claim 3 wherein said means for rotating said lever comprise a handle.
  • a toggle press as defined in claim 3 wherein said lever is rotatably mounted within sleeve means which themselves are rotatably mounted on said support, the axis about which said lever rotates within said sleeve means being spaced from the axis about which said sleeve means rotate with respect to said support, and wherein said fluid pressure means is connected to said sleeve means for rotating the same about their own axis.
  • a toggle press comprising, in combination:
  • a toggle linkage comprising a lever and a toggle link pivotally connected to said lever
  • lever arm means non-rotatably connected at one end thereof to said sleeve means
  • valve means for placing said fluid pressure drive means in communication with a source of fluid medium under pressure; and (k) valve actuator means carried by said shaft for rotation therewith for opening said valve means when said toggle linkage is just short of its dead center position, thereby to cause said fluid pressure means to rotate said sleeve means and hence move said shaft and with it said toggle linkage and said plunger until the latter is in its final operative position.
  • said fluid pressure means comprise a cylinder, 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
US309610A 1962-09-20 1963-09-18 Toggle press Expired - Lifetime US3222913A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL0043009 1962-09-20

Publications (1)

Publication Number Publication Date
US3222913A true US3222913A (en) 1965-12-14

Family

ID=7270110

Family Applications (1)

Application Number Title Priority Date Filing Date
US309610A Expired - Lifetime US3222913A (en) 1962-09-20 1963-09-18 Toggle press

Country Status (5)

Country Link
US (1) US3222913A (enrdf_load_stackoverflow)
CH (1) CH407747A (enrdf_load_stackoverflow)
DE (1) DE1427402C3 (enrdf_load_stackoverflow)
FR (2) FR1350209A (enrdf_load_stackoverflow)
NL (1) NL297925A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763689A (en) * 1970-08-20 1973-10-09 B & R Products Proprietary Ltd Multi-purpose sheet metal folding press, punch, and nibbling machine
US4393684A (en) * 1981-02-12 1983-07-19 Penn Engineering & Manufacturing Corp. Press having a linkage mechanism connectable and disconnectable from a ram
EP1452301A2 (de) 2003-03-01 2004-09-01 Niemann, Wolfgang, Dipl.-Ing. Kniehebelpresse

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2808091A1 (de) * 1978-02-24 1979-08-30 Moog Gmbh Einrichtung zum daempfen des schnittschlags bei hydraulischen pressen
DE3719442A1 (de) * 1987-06-11 1988-12-22 Pfisterer Elektrotech Karl Tragbare presse zur herstellung von pressverbindungen
DE4233233C2 (de) * 1992-10-02 1994-07-28 Weidmueller Interface Handhebelpresse
DE4322318A1 (de) * 1993-07-05 1995-01-12 I Vom Heu Rationalisierungstec Pressvorrichtung
WO2009018826A1 (en) 2007-08-03 2009-02-12 Vkr Holding A/S A window comprising a bordered pane module
RU200442U1 (ru) * 2020-03-24 2020-10-26 Владимир Михайлович Анфалов Ручной пресс

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1463229A (en) * 1920-07-15 1923-07-31 United Shoe Machinery Corp Cutting machine
US1750144A (en) * 1928-04-12 1930-03-11 Andrew O Wisti Brake-lining machine
US2633094A (en) * 1948-12-02 1953-03-31 Bliss E W Co Power-operated press device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1463229A (en) * 1920-07-15 1923-07-31 United Shoe Machinery Corp Cutting machine
US1750144A (en) * 1928-04-12 1930-03-11 Andrew O Wisti Brake-lining machine
US2633094A (en) * 1948-12-02 1953-03-31 Bliss E W Co Power-operated press device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763689A (en) * 1970-08-20 1973-10-09 B & R Products Proprietary Ltd Multi-purpose sheet metal folding press, punch, and nibbling machine
US4393684A (en) * 1981-02-12 1983-07-19 Penn Engineering & Manufacturing Corp. Press having a linkage mechanism connectable and disconnectable from a ram
EP1452301A2 (de) 2003-03-01 2004-09-01 Niemann, Wolfgang, Dipl.-Ing. Kniehebelpresse
EP1452301B1 (de) * 2003-03-01 2013-07-03 Reinhold Schulte Kniehebelpresse

Also Published As

Publication number Publication date
FR1370270A (fr) 1964-08-21
DE1427402A1 (de) 1968-12-05
CH407747A (de) 1966-02-15
DE1427402C3 (de) 1973-09-20
DE1427402B2 (de) 1973-03-01
NL297925A (enrdf_load_stackoverflow)
FR1350209A (fr) 1964-01-24

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