US3855840A - Material support apparatus for a press brake system - Google Patents

Material support apparatus for a press brake system Download PDF

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Publication number
US3855840A
US3855840A US00346459A US34645973A US3855840A US 3855840 A US3855840 A US 3855840A US 00346459 A US00346459 A US 00346459A US 34645973 A US34645973 A US 34645973A US 3855840 A US3855840 A US 3855840A
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US
United States
Prior art keywords
workpiece
frame
lower die
die
supported
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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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US00346459A
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English (en)
Inventor
S Kawano
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.)
Amada Co Ltd
Original Assignee
Amada Co Ltd
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
Priority claimed from JP9392970A external-priority patent/JPS495500B1/ja
Priority to FR7138012A priority Critical patent/FR2111852B1/fr
Application filed by Amada Co Ltd filed Critical Amada Co Ltd
Priority to US00346459A priority patent/US3855840A/en
Application granted granted Critical
Publication of US3855840A publication Critical patent/US3855840A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B21D5/0281—Workpiece supporting devices

Definitions

  • ABSTRACT This invention provides a workpiece supporting apparatus for a press brake or bending press of the type in which the punch or upper die is stationary and the lower die is movable upwardly towards said punch, said apparatus being so designed and constructed that the workpiece is raised at a rate of elevation equal to that of the lower die and, upon the start of the bending operation, the workpiece continues its upward movement, and the support base is tilted to follow the inclined position of the workpiece caused by the bending operation.
  • a press brake or bending press in which a punch or upper die is stationary and a lower die is movable upwardly to produce a bend in a workpiece positioned between the dies, the operator usually has to hold the free end of the workpiece and manipulate and support it as the lower die is brought near to the stationary upper die and the said end is raised as the bending operation proceeds.
  • Such manual operation is not difficult if the workpiece is relatively small and light in weight, but such will not be the case when the workpiece is both heavy and larger in size.
  • the present invention is so devised that the support and follow-up movement will proceed automatically and accurately and that the bending operation is performable by a single workman upon selecting the bending position of the work and depressing a foot-operated pedal.
  • FIG. 1 is a front elevational view of a press brake or bending press embodying the concepts of the present invention
  • FIG. 2 is a side view of the apparatus shown in FIG. 1;
  • FIG. 3 is an enlarged side view of a portion of apparatus shown in FIG. 2;
  • FIG. 4 is a view similar to F IG. 3, showing parts of the apparatus adjusted to different positions in accordance with the operational sequence of the apparatus;
  • FIGS. 5 and 6 are sectional views taken along lines VV and VI-VI respectively of FIG. 3;
  • FIG. 8 is a schematic hydraulic circuit diagram
  • FIGS. 9a-9f are schematic illustrations depicting a typical bending sequence for an apparatus of the type disclosed in the preceding drawings.
  • the apparatus comprises a base 1, a vertically movable frame 3 and a tiltable table 5.
  • Base 1 is a rectangular structure secured on the same floor surface as the press brake or bending press, said base I accommodating therein a lift cylinder 7 and hydraulic devices 9 (pump, motor, etc.) and equipped with a level adjusting means 11 for levelling the vertically movable frame 3 at its free end.
  • the frame 3 consists of a rectangular structure movable vertically and comprising an upper framing 3a and a lower framing 3b which are joined together substantially at a central position. The frame 3 is supported in the vicinity of the thus joined portion by the piston rod 7a of the lift cylinder 7.
  • the vertically movable frame 3 is pivotally attached at its opposite end by means of a pin 17, the latter being carried by a yoke member 15 which has two arms 15a, 15b.
  • the arms 15a, 15b are secured to and extend obliquely from a die support base 13.
  • the yoke member 15 is adjustable vertically by means of an adjustment screw 19 and is movable integrally with a die 21 when thus adjusted.
  • the vertically movable frame 3 is provided at its bottom end in the vicinity of the yoke member 15 with a block 23 and a bell crank means 25 is carried by the block 23, with its shorter arm 25a horizontally extending to the right as viewed in FIG. 3 and its longer arm 25b depending downwardly.
  • the shorter arm 25a of the bell crank lever means 25 abuts through an adjusting bolt and nut 26 on the lower surface of the vertically movable frame 3, while the longer arm 25b abuts on the projecting end of a decelerating valve means 29 through the intermediary of a connecting rod 27.
  • the numeral 31 denotes a spring which urges the bell crank lever means 25 in its entirety to rotate counterclockwise around its pivot shaft 24.
  • Two support blocks 33 are mounted on opposite sides of the frame 3 so as to be adjustable towards and away from the lower die, i.e., in the left and right hand directions as viewed in FIG. 3.
  • elongated guide slots 35, 37 (See FIG. 5) on each support block 33 cooperate with bolts 36, 38 projecting upwardly fronf the frame 3.
  • Adjustment of the support blocks 33 is accomplished by first loosening the bolts 36, 38, and thereafter rotating the handwheel 39 which is connected through a system of bevel gears and connecting shafts to shafts threaded through projections 33a, the latter extending laterally from the support blocks.
  • the other block is constructed and adjusted in the same manner by means of an extension of the shaft on which the handwheel 39 is mounted.
  • the support blocks 33 are adjusted according to the width of a V-shaped groove 21v in the lower die 21 so that the distance between the right-hand shoulder 21s as viewed in FIG. 3 of the V-shaped groove 21v and the pitch circle of the internal gear 41a of a quadrant sector gear member 41 will be precisely equal to that between the said pitch circle and the pitch circle of the external gear 41b of the sector gear member 41 or, in other words, so that the distances 1" as shown in FIG. 3 will be equal.
  • a pair of rotatable parallel shafts 43, 45 extend between the support blocks 33 located on opposite sides of the frame 3.
  • Each support block is further provided with lateral projections 33b, 330 which provide bearings for short rotatable shafts 47.
  • Each of the shafts 47 is provided at opposite ends with bevel gears 47a, 47b, the fonner being in meshed relationship with a beveled gear 44 on one end of shaft 43 and the latter being in meshed relationship with a bevelled gear 46 on the other end of shaft 45.
  • a pinion gear 49 on shaft 43 is in meshed relationship with the internal gear 41a of the sector gear member 41. Each time the pinion gear 49 performs a complete revolution.
  • a pinion gear 51 which is on shaft 45 and which is in meshed relationship with the external gear 41b of the sector gear member 41 will perform two revolutions.
  • each support block 33 is further provided with rollers 53, 55 positioned to run along an arcuate guide slot 415 on the sector gear member 41, the latter being secured at its upper end to the tiltable table 5.
  • the sector gear member 41 will perform a circular motion smoothly with the shoulder 21s of the V-shaped groove 21v of the die 21 as the center of such circular motion.
  • the vertically movable frame 3 is provided at its end with two adjustment bolts 57 which serve as a means for maintaining the tiltable table in the horizontal position when the tiltable table is not in operation.
  • the lower end of a tilting cylinder 61 is pivotally connected to a support means 60 which in turn is attached to the lower end of a support column 59 depending from substantially the central zone of the vertically movable frame 3.
  • the tiltable table 5 provides a lattice structure having on its upper surface a plurality of ball castors 63 and several electromagnets 65 for sliding and supporting the workpiece.
  • the piston rod 62 of the tiltable cylinder 61 is pivotally connected to some suitable portion as at 67 on the tiltable table 5.
  • the tiltable table 5 and the vertically movable frame 3 will move apart from each other.
  • the tiltable table will assume an inclined position such that a straight line connecting the uppermost points of the ball castors 63 will be situated in a radial line extending from the righthand side shoulder 21s of the V-shaped groove 21v of the die 21.
  • An abutment bar 69 is secured to a mounting shaft 71 which is pivotally mounted on the end of the tiltable table 5 in the vicinity of the lower die 21.
  • the abutment bar 69 is urged to rotate clockwise as viewed in FIG. 3 by resilient means (not shown).
  • a bar 73 secured to shaft 71 and extending therefrom to the right as viewed in FIG. 3 is arranged to abut lightly on the head 75a of a decelerating valve means 75.
  • a hydraulic pump and other hydraulic devices driven by motor M are adapted for imparting vertical movement to the frame 3 and the tiltable table 5, while those driven by motor M are adapted for tilting the table 5 in relation to the frame 3.
  • the pump output for raising the frame 3 is so designed that the speed of upward movement of the piston 77 shown in FIG. 8 will always be greater than that of the die 21.
  • the capacity of the hydraulic pump for driving the piston 79 for the tiltable table 5 is selected to a higher value so as to have displacement for the capacity of the cylinder 61.
  • the capacity of each decelerating valve means 29, 75 is selected so that the entire output from its corresponding hydraulic pump will be allowed to flow therethrough when the head of each valve means is pushed from its fully closed to the fully opened position.
  • the workpiece M When performing a bending operation, the workpiece M is placed on the ball casters on the tiltable table 5, and at this time the motors M M have been started, but the frame 3 will not be elevated, since the head of the decelerating valve means 29 is pressed by the longer arm b of the bell crank means 25 to make the entire flow of hydraulic fluid from the pump flow therepast.
  • the pin 17 supporting the vertically movable frame 3 On the start of the upward movement of the lower die 21, the pin 17 supporting the vertically movable frame 3 will be raised therewith and accordingly the frame 3 will have a tendency to rotate around the pin 17 as its free end remains in the lowered position.
  • the longer arm 25b of the bell crank means 25 will be rotated clockwise to release the head of the valve means 29 to close the valve so that the hydraulic fluid will be delivered into the cylinder 7 for elevating the frame 3.
  • the lower arm 25b of the bell crank means 25 will be rotated counterclockwise into pressure contact with the head of the valve means 29 under the force of the spring 31 so as to make the hydraulic fluid flow therepast and slow down the upward movement of the vertically movable frame 3.
  • the angles between the longer arm 25b of the bell crank means 25 and the vertically movable frame 3 can be adjusted by the adjusting bolt and nut 26 provided on the end portion of the shorter arm 25a of the bell crank means 25.
  • the abutment bar 69 keeps its upper surface flush with that of the tiltable table 5, and therefor the bar 73 is kept in its raised position so that the head part 75a of the decelerating valve means 75 is free from the pressure of the bar 73 and is extended outwards.
  • the hydraulic fluid from the pump is made to flow through the decelerating valve means 75 and is prevented from flowing too much into the cylinder 61,
  • the inclination of the table 5 will proceed simultaneously with upward movement of the lower die 21. Because of the controlling action of the decelerating valve means, the table 5 will follow the movement of the workpiece M and keep it in position for the optimun bending operation.
  • electromagnets 75 mounted on the tiltable table 5 will be energized and thus the workpiece M is held on the upper surface of the tiltable table 5. The holding action of the electromagnets 65 will continue until the workpiece M is brought to its horizontal position as shown in FIG. 9e.
  • the lower die 21 and the vertically movable frame 3 will first be lowered, and then the table 5 will resume its horizontal position as shown in FIG. 9e.
  • the operating cycle is then completed when the workpiece M is removed, as shown in FIG. 9f.
  • a workpiece support apparatus comprising in combination: a base fixed in relation to the press brake or bending press; a frame supported on and movable vertically in relation to said base; a table carried on and pivotally movable relative to said frame, said table being positioned to support a workpiece having a portion thereof located between the upper and lower dies; first operating means for imparting vertical motion to said frame; second operating means for imparting pivotal motion to said table; first control means responsive to vertical movement of the lower die, said first control means being associated with said first operating means and being operative in conjunction therewith to move said frame vertically in unison with the lower die; and second control means responsive to pivotal movement of a workpiece supported on said table during a bending operation, said second control means being associated with said second operating means and being operative in conjunction therewith to pivotally move said table in unison with the work
  • the apparatus as claimed in claim 1 further characterized by means for adjusting said table laterally on said frame in opposite directions relative to the path of vertical movement of the lower die.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US00346459A 1970-10-27 1973-03-30 Material support apparatus for a press brake system Expired - Lifetime US3855840A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7138012A FR2111852B1 (enrdf_load_stackoverflow) 1970-10-27 1971-10-22
US00346459A US3855840A (en) 1970-10-27 1973-03-30 Material support apparatus for a press brake system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP9392970A JPS495500B1 (enrdf_load_stackoverflow) 1970-10-27 1970-10-27
US19131971A 1971-10-21 1971-10-21
US00346459A US3855840A (en) 1970-10-27 1973-03-30 Material support apparatus for a press brake system

Publications (1)

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US3855840A true US3855840A (en) 1974-12-24

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US00346459A Expired - Lifetime US3855840A (en) 1970-10-27 1973-03-30 Material support apparatus for a press brake system

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US (1) US3855840A (enrdf_load_stackoverflow)
FR (1) FR2111852B1 (enrdf_load_stackoverflow)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068519A (en) * 1976-01-05 1978-01-17 Kasle Steel Corporation Unloader for press
US4111027A (en) * 1975-02-12 1978-09-05 Alan Stuart Bottomley Electromagnetic apparatus
US4114418A (en) * 1976-12-09 1978-09-19 Jarman David J Material handling means
US4341104A (en) * 1979-11-19 1982-07-27 Jarman David J Press brake plate lifter table
EP0100420A1 (de) * 1982-07-14 1984-02-15 Hämmerle AG Vorrichtung zum Manipulieren von Werkstücken
EP0110655A3 (en) * 1982-11-25 1984-08-22 Shin Meiwa Industry Co., Ltd. Automatic bending apparatus
EP0136598A3 (en) * 1983-10-04 1985-09-25 Hammerle Ag Device for manipulating metal sheets
US4753099A (en) * 1985-09-18 1988-06-28 Trumpf Gmbh & Co. Bending press for sheet metal
US4805439A (en) * 1986-09-05 1989-02-21 Oki Electric Industry Co., Ltd. Work following apparatus and method for press working
WO1990003857A1 (en) * 1988-10-07 1990-04-19 Aliko Oy Alitalon Konepaja Support device in a press brake
EP0325840A3 (en) * 1988-01-29 1990-08-16 Kabushiki Kaisha Shinwa Giken Workpiece-supporting device for bending machines
US5048318A (en) * 1989-09-18 1991-09-17 L. Schuler Gmbh Intermediate depositing station between machining stages of a press
US5632181A (en) * 1995-02-23 1997-05-27 Verson, A Division Of Allied Products Corporation System and method for transferring a work piece in a multi-station press
US5634255A (en) * 1994-11-03 1997-06-03 Bishop; Bob R. Method and apparatus for automated processing and handling of mash weldedsheet metal blanks
US5673585A (en) * 1995-04-26 1997-10-07 Bishop; Bob Automated dimpling apparatus
US5875673A (en) * 1997-12-30 1999-03-02 Verson, A Division Of Allied Products Corporation Orientation station for multi-station metal-forming machines
US20050223549A1 (en) * 2004-04-13 2005-10-13 Hans-Dieter Braun Apparatus for punching and welding or bonding workpieces
EP1651019A3 (de) * 2004-10-25 2006-05-10 METAQ GmbH Druckschablone, Spannrahmen zum Einspannen der Druckschablone sowie Verfahren und Vorrichtung zur Herstellung der Druckschablone
US20080072648A1 (en) * 2006-09-27 2008-03-27 Ras Reinhardt Maschinenbau Gmbh Material-Working Machine
US20110138869A1 (en) * 2007-04-30 2011-06-16 Trumpf Maschinen Austria Gmbh & Co. Kg. Bending machine comprising a cavity for a foot space
US10363591B2 (en) * 2014-03-19 2019-07-30 Trumpf Maschinen Austria Gmbh & Co. Kg. Bending aid for a press brake

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108465717B (zh) * 2018-05-15 2024-11-29 广东蓝昊智能科技有限公司 一种全自动钣金折弯机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2368478A (en) * 1945-01-30 Work handling apparatus fob
US2922459A (en) * 1956-11-27 1960-01-26 S & C Electric Co Material handling means
US3021886A (en) * 1960-03-16 1962-02-20 Arvin Ind Inc Turret punch for pipe bending machine
US3146819A (en) * 1960-10-31 1964-09-01 Waldemar Lindemann Press having automatic bend detector
GB985732A (en) * 1963-02-28 1965-03-10 Keeton Sons Improvements in or relating to folding brakes
US3390566A (en) * 1965-12-10 1968-07-02 Foster Wheeler Corp Fin-tube panel bending apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2368478A (en) * 1945-01-30 Work handling apparatus fob
US2922459A (en) * 1956-11-27 1960-01-26 S & C Electric Co Material handling means
US3021886A (en) * 1960-03-16 1962-02-20 Arvin Ind Inc Turret punch for pipe bending machine
US3146819A (en) * 1960-10-31 1964-09-01 Waldemar Lindemann Press having automatic bend detector
GB985732A (en) * 1963-02-28 1965-03-10 Keeton Sons Improvements in or relating to folding brakes
US3390566A (en) * 1965-12-10 1968-07-02 Foster Wheeler Corp Fin-tube panel bending apparatus

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111027A (en) * 1975-02-12 1978-09-05 Alan Stuart Bottomley Electromagnetic apparatus
US4068519A (en) * 1976-01-05 1978-01-17 Kasle Steel Corporation Unloader for press
US4114418A (en) * 1976-12-09 1978-09-19 Jarman David J Material handling means
US4341104A (en) * 1979-11-19 1982-07-27 Jarman David J Press brake plate lifter table
EP0100420A1 (de) * 1982-07-14 1984-02-15 Hämmerle AG Vorrichtung zum Manipulieren von Werkstücken
US4594870A (en) * 1982-11-25 1986-06-17 Shin-Meiwa Industry Co., Ltd. Automatic bending apparatus
EP0110655A3 (en) * 1982-11-25 1984-08-22 Shin Meiwa Industry Co., Ltd. Automatic bending apparatus
EP0136598A3 (en) * 1983-10-04 1985-09-25 Hammerle Ag Device for manipulating metal sheets
US4753099A (en) * 1985-09-18 1988-06-28 Trumpf Gmbh & Co. Bending press for sheet metal
US4805439A (en) * 1986-09-05 1989-02-21 Oki Electric Industry Co., Ltd. Work following apparatus and method for press working
EP0325840A3 (en) * 1988-01-29 1990-08-16 Kabushiki Kaisha Shinwa Giken Workpiece-supporting device for bending machines
WO1990003857A1 (en) * 1988-10-07 1990-04-19 Aliko Oy Alitalon Konepaja Support device in a press brake
US5048318A (en) * 1989-09-18 1991-09-17 L. Schuler Gmbh Intermediate depositing station between machining stages of a press
US5634255A (en) * 1994-11-03 1997-06-03 Bishop; Bob R. Method and apparatus for automated processing and handling of mash weldedsheet metal blanks
US5979212A (en) * 1995-02-23 1999-11-09 Verson System for rotation of cross bars in a multiple station transfer press
US5632181A (en) * 1995-02-23 1997-05-27 Verson, A Division Of Allied Products Corporation System and method for transferring a work piece in a multi-station press
US5722283A (en) * 1995-02-23 1998-03-03 Verson, A Divison Of Allied Products Corporation System and method for rotation of cross bars in a multiple station transfer press
US5782129A (en) * 1995-02-23 1998-07-21 Verson, A Division Of Allied Products Corporation Method for transferring a work piece in a multi-station press
US5865058A (en) * 1995-02-23 1999-02-02 Verson, A Division Of Allied Products, Inc. System for rotation of cross bars in a multiple station transfer press
US5673585A (en) * 1995-04-26 1997-10-07 Bishop; Bob Automated dimpling apparatus
US5875673A (en) * 1997-12-30 1999-03-02 Verson, A Division Of Allied Products Corporation Orientation station for multi-station metal-forming machines
US20050223549A1 (en) * 2004-04-13 2005-10-13 Hans-Dieter Braun Apparatus for punching and welding or bonding workpieces
US7325581B2 (en) * 2004-04-13 2008-02-05 Maschinenfabrik Spaichingen Gmbh Apparatus for punching and welding or bonding workpieces
EP1651019A3 (de) * 2004-10-25 2006-05-10 METAQ GmbH Druckschablone, Spannrahmen zum Einspannen der Druckschablone sowie Verfahren und Vorrichtung zur Herstellung der Druckschablone
US20080072648A1 (en) * 2006-09-27 2008-03-27 Ras Reinhardt Maschinenbau Gmbh Material-Working Machine
US20110138869A1 (en) * 2007-04-30 2011-06-16 Trumpf Maschinen Austria Gmbh & Co. Kg. Bending machine comprising a cavity for a foot space
US8833131B2 (en) * 2007-04-30 2014-09-16 Trumpf Maschinen Austria Gmbh & Co. Kg Bending machine comprising a cavity for a foot space
US10363591B2 (en) * 2014-03-19 2019-07-30 Trumpf Maschinen Austria Gmbh & Co. Kg. Bending aid for a press brake

Also Published As

Publication number Publication date
FR2111852A1 (enrdf_load_stackoverflow) 1972-06-09
FR2111852B1 (enrdf_load_stackoverflow) 1974-03-29

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