US3198108A - Hydraulic presses - Google Patents

Hydraulic presses Download PDF

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Publication number
US3198108A
US3198108A US277410A US27741063A US3198108A US 3198108 A US3198108 A US 3198108A US 277410 A US277410 A US 277410A US 27741063 A US27741063 A US 27741063A US 3198108 A US3198108 A US 3198108A
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United States
Prior art keywords
frame
members
pairs
links
respect
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
US277410A
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English (en)
Inventor
Ingold Fritz
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.)
Brevets Aero Mecaniques SA
Original Assignee
Brevets Aero Mecaniques SA
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Publication date
Application filed by Brevets Aero Mecaniques SA filed Critical Brevets Aero Mecaniques SA
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Publication of US3198108A publication Critical patent/US3198108A/en
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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
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means

Definitions

  • the present invention relates to hydraulic presses for bending and folding metal sheets or other materials by means of suitable tools.
  • the press according tothe present invention is characterized in that it comprises at least one hydraulic ram acting upon the pivot of one pair of toggle links, said pivot being connected through a rigid rod to the horizontal pivot of another pair of toggle links located opposite ,the iirst one so that these toggle links move all in the same plane, the upper links of said pairs being pivoted to the frame of the press about respective parallel axes and being parallel together, the lower links of said pairs, which fare also parallel together, being pivoted to pulling members movable vertically with respect to said frame and which serve to guide and to move the movable plate of the press, so as t ensure translatory displacements of said plate, means being provided to adjust vertically the relative position of said movable plate with respect to at least one of said pulling members.
  • FlG. l is a front View of the press showing the relationship between frame 9, movable plate and rod and y forked member assemblies 20, 13 and 21, 14.
  • FlG. 2 is a right side View of FIG. 1 showing the structure of forked member 14 and its relation to rod 21.
  • FGS. 3 and 4 are sectional views of certain portions of FlG. l as depicted therein by sections III- lll and lV-IV respectively.
  • the machine illustrated by the drawings comprises a hydraulic ram 2 operated by a pump 1, which may be either a hand pump or a motor pump.
  • the piston 3 of this ram is connected to the pivot of a rst pair of toggle links 4, this pivot 25 being itself connected through a rigid rod 5 with the pivot 24 of a second pair of toggle links 6.
  • the upper links of these pairs are pivoted to the machine frame 9 at '7 and 8 respectively.
  • the cylinder of the hydraulic ram is pivoted to the machine frame 9 at 1t).
  • the lower links of the two pairs are pivoted, about axes 11 and 12, to pulling forked members 13 and 14 slidable vertically with respect to frame 9.
  • Forked member 13 is guided longitudinally and transversely, that is, member 13 is guided to allow motion in a vertical direction only, with respect to frame 9 whereas forked member 14 is only guided transversely, that is, member 1d is guided yto allow motion in a longitudinal direction as well as in a vertical direction, with respect to said frame.
  • rod 2li and forked member 13 can only move in a vertical direction due to guide means 31
  • the motion of a forked member 14 is restricted from any transverse motion but is free to swing about pivot 11 in a plane parallel to frame 9 and is guided in a vertical direction only to ⁇ the extent that pivot 11 is so guided.
  • Member 11 is connected to plate 1S so that it can readily be seen that the amount of deviation of member 14 from the vertical in a plane parallel to frame 9 is dependent on the inclination of plate 15. Pivot 11 is guided to allow only vertical motion thereof. Bushings 32 and forked members 13 3,198,196 Patented Aug. 3, 1965 and 111i prevent transverse motion of pivots 11 and 12. As shown in FIGS. 3 and 4, bushings 32 are depicted spaced trom frame 9. In practice, ⁇ these bushings can be located adjacent frame 9 leaving the desired clearance.
  • the movable plate 15 of the press is connected, through trunnions 16 and 17 and threaded sleeves 18 and 19, with threaded rods lil and 21 rigidly Xed to forked members 13 and 14.
  • movable plate 15 When the machine is operated manually, movable plate 15 is returned, after every downward displacement thereof, into initial position by air or another compressible i'luid which has been compressed, in a variable volume chamber of cylinder 2, by the movement of piston 3 toward the left.
  • the air under pressure which has moved piston 3 toward the left is allowed to escape by means or valve 3i)
  • the expansion of the compressed air in the chamber of cylinder 2 returns piston 3 toward the right.
  • hand pump 1 When the machine is motor operated, hand pump 1 is replaced by a four-way distributing valve and piston 3 is returned to its initial position by causing the iiuid under pressure to tlow through another way.
  • the stroke of movable plate 15 may be adjusted by means of a distributing valve actuated by an adjustable part mounted on the mechanism which transmits the working pressure.
  • An important advantage of the machine lies in the fact: that, although it is operated hydraulically, it permits obtaining strictly parallel displacements of movable plate 15, even if the machine acts laterally. Furthermore, the machine may be operated either manually or by means of a motor Without having to undergo any modification.
  • Another advantage of the machine is that with a single cylinder and a relatively low pressure there is obtained a relatively high Working pressure, the whole of the control mechanism being enclosed in the lower frame portion 9.
  • the idle stroke during the pressing operation, takes place at high speed whereas the active strokes take place softly or slowly.
  • the return movement of the movable plate 15 also takes place at high speed.
  • a press of the type described which comprises in having a bifurcated section straddling saidframe with elements of said section disposed adjacent to vertical sidesv of said frame, said members being movable vertically with respect to said frame, means guiding one of said members for vertical movement only with respect to said frame,
  • said members being located'at a distanceV from each other in a direction perpendicular to said axes and said toggle links being located in ⁇ substantially the same vertical plane, a connecting rod extending between said pivots, a plate having its ends operatively connected with said members so as to be movable vertically with respect to said frame by simultaneous displacements of said members, a hydraulic ram including a piston and cylinder movable with respect to each other, said piston being operatively connected to one of the pivots in a substantially horizontal direction by which said pairs of toggle links are expanded to move said plate toward said frame, and means for'independently adjusting in the vertical direction the connection between each end of said plate andthe corresponding member for varying the inclination of said plate.
  • the adjusting means comprises a threadedfrod yrigid with each of said members, a threaded sleeve screwed on said threaded rod, means for operatively connecting said sleeve with said plate and means for rotating said sleeve with respect lto said rod.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
US277410A 1959-07-18 1963-04-23 Hydraulic presses Expired - Lifetime US3198108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH7595659A CH374356A (de) 1959-07-18 1959-07-18 Hydraulische Presse zum Biegen und Abkanten

Publications (1)

Publication Number Publication Date
US3198108A true US3198108A (en) 1965-08-03

Family

ID=4534574

Family Applications (1)

Application Number Title Priority Date Filing Date
US277410A Expired - Lifetime US3198108A (en) 1959-07-18 1963-04-23 Hydraulic presses

Country Status (4)

Country Link
US (1) US3198108A (de)
CH (1) CH374356A (de)
DE (1) DE1206385B (de)
GB (1) GB884332A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3316749A (en) * 1963-08-13 1967-05-02 Davy & United Eng Co Ltd Presses
US3520252A (en) * 1967-10-13 1970-07-14 Automated Building Components Toggle press
US4321819A (en) * 1980-07-23 1982-03-30 Dyneer Corporation Press construction
USRE32048E (en) * 1979-01-11 1985-12-17 Prince Corporation Tie bar adjustment system
FR2597013A1 (fr) * 1986-04-11 1987-10-16 Amada Co Ltd Cintreuse de plaques
US6154942A (en) * 1997-09-26 2000-12-05 Tesco Engineering, Inc. Closure panel hemming apparatus
WO2016016830A1 (en) * 2014-07-30 2016-02-04 Euromac S.P.A. Press brakes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1527007B1 (de) * 1963-12-05 1970-10-22 Moeller & Neumann Gmbh Blechschere mit einem geraden und einem gebogenen Messer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US336604A (en) * 1886-02-23 tweddell
US872885A (en) * 1906-06-28 1907-12-03 Ellis B Anderson Cake-forming machine.
GB138398A (en) * 1919-01-07 1920-02-12 Thomas Andrew Hayward Improvements in combined punching and shearing machines
US1737563A (en) * 1926-07-14 1929-12-03 Rufus E Boschert Fluid-pressure-operated motor
US2608253A (en) * 1947-11-24 1952-08-26 Diamond Machine Tool Company Machine tool press
GB790112A (en) * 1953-05-05 1958-02-05 Sandt Ag J Improvements in or relating to toggle press

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB617941A (en) * 1946-09-30 1949-02-14 Vickers Armstrongs Ltd Improvements in or relating to press brakes
GB706320A (en) * 1950-08-17 1954-03-31 Charles Joseph Rhodes Overload release devices for hydraulic bending machines and the like
DE1179175B (de) 1956-10-17 1964-10-08 Gustaaf De Ridder Abkantpresse oder Schere mit auf mehrarmige Hebel wirkendem Hubzylinder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US336604A (en) * 1886-02-23 tweddell
US872885A (en) * 1906-06-28 1907-12-03 Ellis B Anderson Cake-forming machine.
GB138398A (en) * 1919-01-07 1920-02-12 Thomas Andrew Hayward Improvements in combined punching and shearing machines
US1737563A (en) * 1926-07-14 1929-12-03 Rufus E Boschert Fluid-pressure-operated motor
US2608253A (en) * 1947-11-24 1952-08-26 Diamond Machine Tool Company Machine tool press
GB790112A (en) * 1953-05-05 1958-02-05 Sandt Ag J Improvements in or relating to toggle press

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3316749A (en) * 1963-08-13 1967-05-02 Davy & United Eng Co Ltd Presses
US3520252A (en) * 1967-10-13 1970-07-14 Automated Building Components Toggle press
USRE32048E (en) * 1979-01-11 1985-12-17 Prince Corporation Tie bar adjustment system
US4321819A (en) * 1980-07-23 1982-03-30 Dyneer Corporation Press construction
FR2597013A1 (fr) * 1986-04-11 1987-10-16 Amada Co Ltd Cintreuse de plaques
US6154942A (en) * 1997-09-26 2000-12-05 Tesco Engineering, Inc. Closure panel hemming apparatus
WO2016016830A1 (en) * 2014-07-30 2016-02-04 Euromac S.P.A. Press brakes

Also Published As

Publication number Publication date
DE1206385B (de) 1965-12-09
CH374356A (de) 1964-01-15
GB884332A (en) 1961-12-13

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