US3668919A - Combination hydraulic shearing and pressbrake machine - Google Patents
Combination hydraulic shearing and pressbrake machine Download PDFInfo
- Publication number
- US3668919A US3668919A US71451A US3668919DA US3668919A US 3668919 A US3668919 A US 3668919A US 71451 A US71451 A US 71451A US 3668919D A US3668919D A US 3668919DA US 3668919 A US3668919 A US 3668919A
- Authority
- US
- United States
- Prior art keywords
- ram
- cylinders
- cam
- machine
- main
- 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
Links
Images
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
- 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
- B21D5/029—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means with shearing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
- B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
- B23D15/14—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection
-
- 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
- Y10T83/8828—Plural tools with same 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
- Y10T83/8858—Fluid pressure actuated
- Y10T83/8864—Plural cylinders
Definitions
- a combination hydraulic shearing and pressbrake machine is ['30] Foreign Application priority Data disclosed which includes auxiliary hydraulic cylinders in addition to main cylinders to actuate the ram.
- the auxiliary cylin- Sept. 12, Japan ders are at rest i g the shearing mode ofoperation but [52] U.S.C
- This invention relates generally to machine tools and particularly to a Working machine of the'type including in combination a hydraulic guillotine and a pressbrake for shearing and bending aworkpiece through the operation of a single ram.
- Such means for example include a removable plateform of sufficient height to permit the operator to work at a level adjusted to increased height of the ram.
- the provision of such plateform has requird additional floor space, or in some cases an underfloor pitto enable the plateform to retract therein.
- FIG. I is a front elevation of a combination shear and press machine embodying the invention.
- FIG. 2 is a cross-sectional view .of thesame taken on the line Il-ll of FIG. 1;
- FIG. 3 is a cross-sectional view on enlarged scale taken along the line Ill-Ill of FIG. 1;
- FIG. .4. is a cross-sectional view taken on the line lVlV of FIG. 3, showingthis section (left-hand side) as connected to the change-over valves righvhand side) which are employed to change the direction of flow of oil in the hydraulic system according to the invention;
- FIG. 5 is a cross-sectional view taken on the line V-V line of FIG. 3;
- FIG. 6 is a perspective view of a part of the machine showing a rotary lever and its associated cam member
- FIG. 7 is a cross-sectional view showing a cam in pressbrake position taken on the line VII-VII of FIG. 3;
- FIG. 8 is a cross-sectional view taken on the line VIII-VIII of FIG. 3;
- FIG. 9 is a view similarto FIG. 7 but showing the-cam as in shearing position
- FIG. 10 is an oil path circuit utilizedto schematically illustrate the switching between the pressbrake mode of operation and the shearing mode of operation.
- the machine 10 generally comprises a frame structure 1 1 including a pair of laterally spaced side plates 12, upper front plate 13 and lower front plate 14.
- a ledge 15 extends rearwardly of the machine from the upper front plate 13 and has mounted thereon an oil pressure generator 16 and a drive motor 17.
- the generator 16 compactly accommodates therein a pump, tank, control valves,
- a rod 18 extends between and is connected to the opposed side plates l2 adjacent to the lower front plate 14.
- a ram actuating pedal 19 is attached to the rod 18.
- the frame structure 11 further includes a transverse beam member 20 extending between the side plates 12, to which beam is secured a work bed 21 extending forwardly of the machine for supporting-thereon a workpiece during the shearing mode of operation.
- a stationary cutter 22 is secured to the inner end of the beam 20.
- the upper front plate l3' has its lower end portion recessed as at 23 for inserting one end'of a tool bracket 25 which is secured in place by means of bolts 26.
- a ram 27 which has secured to its lower portion a moving cutter 28 coacting with the stationary cutter 22.
- the bracket 25 has a tapered edge or male die 29 for engagement with a correspondingly chamfered female die 30 secured by clamping bolts 31 to the upper end of the ram.
- a retaining plate 32 which is secured at two extreme ends to the side plates 12 by means of bolts 33 and across compression springs 34. This retaining plate is forced downwards against tension in the springs 34 by descending ram 27 and will retain a workpiece in position.
- the retainer 32 returns to normal position by the action of the springs 34 as the ram 27 ascends back to its rest position.
- the function of the springs 34 may be of course replaced by a hydraulic cylinder where heavy duty operations are required. I
- the height of the bed 21 above the floor is normally about 60 to 70cm, while the distance between the floor and the upper end of the ram 27 is about to cm, so that the difference of the operational level between shearing on the bed 21 and bending on the. die 30 of the ram is about 15 to 30cm, preferably about 25cm for maximum operators comfort.
- a support member 35 Projecting rearwardly from the ram 27 is a support member 35 adapted to secure thereto a back gage 36 comprising a screw shaft 37 joumalled in an elongated open-bottom box 38 and a slider 39 having a threaded member 40 for threaded engagement with the screw shaft 37.
- Manual or powered rota tion of the screw shaft 37 moves the slider 39 longitudinally of the shaft 37.
- the slider'39 has an end stop 41 disposed in abutting relation to a workpiece for determining the length of the latter to be cut corresponding to the distance between the stop 41 and the cutting position of the ram 27.
- main hydraulic cylinders 42 having their respective piston rods 43 connected to the opposite ends of the ram 27 for actuating the same in the shearing and bending cycles of operation.
- auxiliary hydraulic cylinders 44 at symmetric positions inwardly of the main cylinders 42 as shown in chain line in FIG. 1. These auxiliary cylinders 44 have their respective piston rods 45 disposed in abutting relation to but normally apart from the ram 27.
- the piston rods 45 of the auxiliary cylinders 44 are arranged to move upwardly into contact with a medial portion of the ram 27 together with the upward stroke of the main cylinders 42 during the bending cycle of operation in which a workpiece is pressed and bent on the die members 20 and 30.
- the auxiliary cylinders 44 are held at rest and need not operate to support and protect the ram 27 against the load of shearing which is usually relatively small.
- the stress of bending which occurs during the pressbrake operation of the machine is considerably large and pronounced at the medial area of the ram, which would often produce physical deflection in the ram and adversely affect the accuracy to which a workpiece is pressed and bent, unless proper remedy is provided.
- This problem has been solved by the arrangement according to the invention in which the piston rods 45 of the auxiliary cylinders 44 approach at the time of pressbrake and engage in abutting relation with the lower end face of the ram 27, thereby supporting the same against the influence of bending load applied during the pressbrake mode of operation.
- Designated at 46 is a plate chute extending from behind the stationary cutter 22 and having a downwardly inclined slide surface for transferring therealong and removing the machined workpiece out of the machine.
- the chute 46 has an opening 47 through which the piston rod 45 of the auxiliary cylinder 44 moves into and out of abutting engagement with the ram 27.
- the circuit 50 includes a main valve 51, a change-over valve 52, a pump P, an oil reservoir RV and various oil passage lines connecting between the valves and the hydraulic cylinders. More specifically, the main valve 51 has an outlet A connected via line 53 to the approach side of the main cylinder 42 in pressbrake position and another outlet B connected via line 54 to the return side of the main cylinder 42.
- the change-over valve 52 associated with the auxiliary cylinder 44 is connected via branch line 55 to line 53 on the approach side of the main cylinder 42.
- the change-over valve 52 has an outlet C connected via line 56 to the approach side of the auxiliary cylinder 44 and another outlet D via line 57 to the return side of the auxiliary cylinder 44.
- a plunger 51a of the main valve 51 is connected by connecting rod 51b to an oil path switching device later described.
- a plunger 52a of the change-over valve 52 is connected by connecting rod 52b through a link 520 to the switching device.
- An oil path switching device 60 essentially comprises a main valve and change-over valve control unit and a ram stroke regulating unit.
- the device 60 is shown in FIG. 3 through FIG. 8 as set in the pressbrake position of the tool machine 10.
- the valve control unit includes a frame member 61 provided at its upper end portion with a yoke 62 for supporting a bell crank 63, at its intermediate portion with a bearing 64 and at its lower end portion with a bearing 65, both bearings being adapted to journal therein a cam shaft 66.
- the frame 61 is further provided with a bearing 67 intermediate between the upper and lower bearings 64 and 65 for supporting a rotary lever 68.
- the cam shaft 66 has at its upper portion a reduced neck 69 at which one end of the bell crank 63 is attached.
- the cam shaft 66 is recessed as at 80 adjacent to the upper end face of the bearing 64 for engagement with a shifting lever 81.
- the shaft 66 has a cam 83 attached thereto intermediate between the upper and lower bearings 64 and 65, and further has a recess 83 adjacent to the upper end face of the lower bearing 65 for receiving a lever member 84.
- Designated at 85 is a pin connecting the bell crank 63 pivotally to the yoke 62.
- One end of the bell crank 63 is secured, as already stated, to the reduced neck 69 of the cam shaft 66, and the other end of the crank 63 is connected to the connecting rod 51b of the main valve 51.
- vertical movement of the cam shaft 66 rotates the bell crank 63 which in turn actuates the plunger 510 so as to open and close the main valve 51.
- the shifting lever 81 is partly fitted within the recess 80 in the cam shaft 66 and secured to a supporting member 86 mounted on the cam shaft 66.
- the lever support 86 has one end connected to the connecting rod 52b, as seen in FIG. 4, which rod is further connected via suitable link 520 to the plunger 52a of the changeover valve 52. With this arrangement, rotation of the shifting lever 81 changes the operating position of the change-over valve 52.
- the rotary lever 68 is rotatably mounted on a shaft 87 journalled in the bearing 67 and has its front end connected to one end of a pull bar 88 (FIGS. 6 and 7). The other end of the bar 88 is connected to a pedal 89 resiliently supported on a spring 90 as seen in FIG. 3.
- the rotary lever 68 is provided at its side facing the cam shaft 66 and at symmetrical positions with cam followers 91a and 91b as shown in FIGS. 6 and 7.
- the cam shaft 66 is provided centrally with the cam 82 which is substantially triangular in plane and which has integral therewith cam dogs 92a and 92b on the side of a ram stroke regulating unit later described.
- the cam dogs 92a and 92b are disposed for engagement respectively with a lower limit dog 109 and a shearing upper limit dog 114, in the ram stroke control.
- the cam 82 is provided with grooves 95a and 95b at positions engageable with the cam followers 91a and 91b, respectively, when the shifting lever 81 is rotated.
- the rotary lever 68 may be alternatively provided with a groove for receiving a pin or roller attached to the cam 82 instead of the foregoing arrangement. It will be also understood that the shifting lever 81 need not necessarily be separately installed, or any other suitable means may be employed for rotating the cam 82. The shifting lever may be for example attached to the cam, in which case the connecting rod 52b may be connected directly to the cam.
- the ram stroke regulating unit comprises a vertical base secured to the ram 27 and provided at its upper part with a bearing 101 for rotatably supporting a screw rod 102.
- the screw rod 102 is threaded throughout its lower half portion and has a bevel gear 103 fixedly mounted at its top, which gear 103 is driven by a mating bevel gear 103'.
- the drive bevel gear 103 is secured to one end of a shaft 104 joumalled in bearing 105 and extending horizontally across the ram 27.
- the other end of the shaft 104 has a handle 106 secured in place by means of a nut 107.
- the screw rod 102 has mounted thereon an upper limit dog 108 and a lower limit dog 109 for limiting the stroke of the ram 27 during the pressbrake mode of operation.
- the lower limit dog 109 is loosely mounted on the non-threaded portion of the screw rod 102 and has one side slidably inserted in a guide groove 110 in the base 100 and normally urged against the wall of the groove 110 by a push screw 111 having a handle 112 as shown in FIG. 8. Releasing the push screw 111 from the lower limit dog 109 permits this dog to move in the guide groove 110 and along the screw rod 102, so as to set the lower limit position of the ram 27 during the pressbrake operation.
- the lower limit dog 109 is held in abutment against the upper face of the cam dog 92b as seen in FIG. 3.
- the upper limit dog 108 is held in threaded engagement with the threaded part of the screw rod 102 and has one side slidably inserted in a guide groove 113 formed in the base 100, so that the dog 108 may move up and down with rotation of the screw rod 102 so as to set the upper limit position of the ram 27 during the pressbrake position.
- the upper limit dog 108 moves upward with the ram 27 and comes in abutment with the lower face of the cam dog 92a.
- limit dog 114 for limiting the upward stroke of the ram 27 during the shearing operation.
- This dog 114 hereinafter referred to as shear limit dog, is disposed side by side with the lower limit dog 102 and attached to the side of the base 100.
- shear limit dog 1 14 is brought into contact with the lower face of the cam dog 92a as shown in FIG. 9. It is to be noted here that it is not necessary to provide a limit dog for limiting the downward stroke of the ram 27 during the shearing operation.
- means for imparting a positive motion to the ram 27 during the shearing operation comprises a cam 115 and a lever member 84 as specifically shown in FIG. 8.
- the cam 1 15 is secured to the lower end face of the shear limit dog 114 and has an inclined face disposed on the side of the cam shaft 66.
- the lever 84 is pivotally connected by pin 116 to the bearing 65 of the cam shaft 66 and has one end in threaded engagement with a screw 117.
- the screw 117 has its forward end disposed in abutting relation to the inclined face of the cam 115.
- a spring 118 has one end secured to the frame member 61 and the other end to the tip end of the lever 84 so as to retain the lever 84 resiliently in position.
- a desired lower limit position of the ram 27 in the pressbrake mode of operation may be easily selected and set by slackening the screw 111 and changing the position of the lower limit dog 109.
- the upper limit position of the ram 27 may be determined by the position of the upper limit dog 108 which is variable by manipulating the screw rod 102.
- Rotating the shifting lever 81 clockwise moves the ram 27 upwards until the shear limit dog 114 abuts against the lower end face of the cam dog 95a and stops the ram 27 in the upper limit position in the shearing mode of operation.
- This rotation of the lever 81 setsthe change-over valve 52 in closed position, so that the auxiliary cylinder 44 is held at rest during the shearing operation.
- the cam follower 91b With the machine set in the shearing mode of operation, the cam follower 91b is engaged in the groove 95b of the cam 82. In this position, depressing the pedal 89 causes the cam shaft 66 to move upwards and the bell crank 63 to move clockwise to pull the plunger 51a, which in turn opens the outlet B of the main valve 51 to impart a downward movement to the ram 27. In this instance, with ascending cam shaft 66, the lever 84 fits into the recess 83 to lock the shaft 66 in position. Therefore, the pedal 89 may be readily released.
- the pedal 89 may be kept depressed until a shearing cycle is completed and may be released upon completion of the shearing operation, whereupon the pedal is urged upwards by the spring 90 to repeat the foregoing procedure to bring the ram back into its upper limit position.
- a combination hydraulic shearing and pressbrake machine which comprises a reciprocating ram, a set of main hydraulic cylinders actuating said ram and a plurality of auxiliary hydraulic cylinders each having a piston rod disposed normally in spaced apart relation to said rarn during the shearing mode of operation, said auxiliary hydraulic cylinders being arranged to operate in the pressbrake mode of operation together with said main cylinders to actuate the ram.
- an oil path switching device which comprises a main and change-over valve control unit and a ram stroke regulating unit
- said valve control unit including a frame, a cam shaft slidably journalled in bearings secured to said frame, a bell crank having one end secured to said cam shaft, a main valve supplying an oil pressure to the main cylinders, a plunger connecting between the other end of said bell crank and said main valve, cam means mounted on said cam shaft, a rotary lever pivotted on said frame and disposed to engage said cam means, a pedal resiliently held in position and connected to said rotary lever, a shifting lever connected to said cam shaft, a change-over valve supplying an oil pressure to the auxiliary cylinders, and a plunger connecting between said shifting lever and said change-over valve, and said ram stroke regulating unit including a screw rod parallel with said cam shaft and rotatably mounted in said frame and means operatively associated with said
- said ram stroke regulating unit further includes dog members movable along said screw rod to select the upper and lower limit positions of the ram.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Shearing Machines (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Control Of Presses (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP44072388A JPS518232B1 (de) | 1969-09-12 | 1969-09-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3668919A true US3668919A (en) | 1972-06-13 |
Family
ID=13487834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US71451A Expired - Lifetime US3668919A (en) | 1969-09-12 | 1970-09-11 | Combination hydraulic shearing and pressbrake machine |
Country Status (2)
Country | Link |
---|---|
US (1) | US3668919A (de) |
JP (1) | JPS518232B1 (de) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3913438A (en) * | 1973-02-09 | 1975-10-21 | Fabco Inc | Wedge actuated cutting and/or forming tools |
US3914975A (en) * | 1970-12-25 | 1975-10-28 | Amada Co Ltd | Hydraulic press brake |
US3933070A (en) * | 1973-02-09 | 1976-01-20 | Fabco, Incorporated | Wedge actuated cutting and/or forming tools |
US3939686A (en) * | 1973-02-09 | 1976-02-24 | Fabco, Incorporated | Wedge actuated cutting and/or forming tools |
US3949587A (en) * | 1974-09-23 | 1976-04-13 | Simmons Sr Roscoe H | Front and rear magnetic gauges for a press brake and the method of operating same |
US4252041A (en) * | 1978-08-04 | 1981-02-24 | Promecam Sisson-Lehmann | Guillotine shearing machine |
DE3106353A1 (de) * | 1980-02-20 | 1981-12-24 | Renon Bolzano Peter Schmitz Unic-Alufer | Vorrichtung zum schneiden, schwenkbiegen und pressbiegen von blechen und aehnlichem |
FR2500343A1 (fr) * | 1981-02-26 | 1982-08-27 | Peddinghaus Rolf | Dispositif de coupe et/ou decoupage de barres et profiles d'acier |
US4604930A (en) * | 1984-04-30 | 1986-08-12 | Avila Robert M | Punch press |
WO1988004967A1 (en) * | 1987-01-12 | 1988-07-14 | Hans Nordberg | Machine for cutting and bending sheet material |
FR2650770A1 (fr) * | 1989-08-08 | 1991-02-15 | Montaigne Michel | Cisaille a guillotine a usages multiples |
US5067340A (en) * | 1988-05-05 | 1991-11-26 | Macgregor Donald C | Precision press brake |
US5243902A (en) * | 1989-12-19 | 1993-09-14 | Amada Co. | Hydraulic bending press with movable lower platen |
US6644091B2 (en) * | 2000-12-15 | 2003-11-11 | Hon Hai Precision Ind. Co., Ltd. | Lower die for a bending machine |
US20040064929A1 (en) * | 2002-10-08 | 2004-04-08 | Yokabitus Robert P. | Shelf formation system and method |
US20150273555A1 (en) * | 2012-10-18 | 2015-10-01 | Nivora Ip B.V. | Spring Means for Device for Working Sheet-Like Material |
US11292047B2 (en) * | 2019-05-03 | 2022-04-05 | Ford Global Technologies | Mechanical die pressure monitoring system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US117116A (en) * | 1871-07-18 | Improvement in machines for cutting, punching, and upsetting tires | ||
US1333201A (en) * | 1919-07-12 | 1920-03-09 | William B Beatty | Combination punch, shear, and coping machine |
US3550425A (en) * | 1967-07-26 | 1970-12-29 | Promecan Sisson Lehmann | Hydraulic machine for deforming sheet metal |
-
1969
- 1969-09-12 JP JP44072388A patent/JPS518232B1/ja active Pending
-
1970
- 1970-09-11 US US71451A patent/US3668919A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US117116A (en) * | 1871-07-18 | Improvement in machines for cutting, punching, and upsetting tires | ||
US1333201A (en) * | 1919-07-12 | 1920-03-09 | William B Beatty | Combination punch, shear, and coping machine |
US3550425A (en) * | 1967-07-26 | 1970-12-29 | Promecan Sisson Lehmann | Hydraulic machine for deforming sheet metal |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3914975A (en) * | 1970-12-25 | 1975-10-28 | Amada Co Ltd | Hydraulic press brake |
US3913438A (en) * | 1973-02-09 | 1975-10-21 | Fabco Inc | Wedge actuated cutting and/or forming tools |
US3933070A (en) * | 1973-02-09 | 1976-01-20 | Fabco, Incorporated | Wedge actuated cutting and/or forming tools |
US3939686A (en) * | 1973-02-09 | 1976-02-24 | Fabco, Incorporated | Wedge actuated cutting and/or forming tools |
US3949587A (en) * | 1974-09-23 | 1976-04-13 | Simmons Sr Roscoe H | Front and rear magnetic gauges for a press brake and the method of operating same |
US4252041A (en) * | 1978-08-04 | 1981-02-24 | Promecam Sisson-Lehmann | Guillotine shearing machine |
DE3106353A1 (de) * | 1980-02-20 | 1981-12-24 | Renon Bolzano Peter Schmitz Unic-Alufer | Vorrichtung zum schneiden, schwenkbiegen und pressbiegen von blechen und aehnlichem |
US4391119A (en) * | 1980-02-20 | 1983-07-05 | Peter Schmitz | Apparatus for cutting swivel-bending and press-bending sheet metal and similar materials |
FR2500343A1 (fr) * | 1981-02-26 | 1982-08-27 | Peddinghaus Rolf | Dispositif de coupe et/ou decoupage de barres et profiles d'acier |
US4457197A (en) * | 1981-02-26 | 1984-07-03 | Rolf Peddinghaus | Device for cutting and/or stamping metal bars and sections |
US4604930A (en) * | 1984-04-30 | 1986-08-12 | Avila Robert M | Punch press |
WO1988004967A1 (en) * | 1987-01-12 | 1988-07-14 | Hans Nordberg | Machine for cutting and bending sheet material |
US5067340A (en) * | 1988-05-05 | 1991-11-26 | Macgregor Donald C | Precision press brake |
FR2650770A1 (fr) * | 1989-08-08 | 1991-02-15 | Montaigne Michel | Cisaille a guillotine a usages multiples |
US5243902A (en) * | 1989-12-19 | 1993-09-14 | Amada Co. | Hydraulic bending press with movable lower platen |
US6644091B2 (en) * | 2000-12-15 | 2003-11-11 | Hon Hai Precision Ind. Co., Ltd. | Lower die for a bending machine |
US20040064929A1 (en) * | 2002-10-08 | 2004-04-08 | Yokabitus Robert P. | Shelf formation system and method |
US20150273555A1 (en) * | 2012-10-18 | 2015-10-01 | Nivora Ip B.V. | Spring Means for Device for Working Sheet-Like Material |
US9440275B2 (en) * | 2012-10-18 | 2016-09-13 | Nivora Ip B.V. | Spring means for device for working sheet-like material |
US11292047B2 (en) * | 2019-05-03 | 2022-04-05 | Ford Global Technologies | Mechanical die pressure monitoring system |
Also Published As
Publication number | Publication date |
---|---|
JPS518232B1 (de) | 1976-03-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3668919A (en) | Combination hydraulic shearing and pressbrake machine | |
US4831861A (en) | Hydraulic cold extrusion press | |
US4507997A (en) | Shearing machine | |
US4369907A (en) | Punching and riveting machine | |
DE4442476C2 (de) | Tragbare Gesenkpresse | |
US4203359A (en) | Hydraulically driven press | |
US4347727A (en) | Programmable upward-stroke insert mechanism for bending brakes and method of use | |
US4210046A (en) | Cross beam press and control | |
DE2830779C2 (de) | Hydraulische Doppeldruckpresse | |
US4370878A (en) | Workpiece ejector system for presses | |
US3298267A (en) | Punch press having means to change lengths of the ram | |
US3276557A (en) | Machine guards | |
US6964225B2 (en) | Press | |
JP2001519241A (ja) | 鍛造プレス機または鍛造機械に設けられたスライドのための液圧式駆動機構 | |
JPH07223109A (ja) | 油圧式ローリングカットシャー装置 | |
US4718228A (en) | Apparatus for displacing a line of track chain | |
US3495526A (en) | Die try-out press | |
KR101788455B1 (ko) | 유압프레스 | |
US3196700A (en) | Driving mechanism for machines | |
US2994303A (en) | Hydraulic presses with valves operated by servo-motors | |
DE1078408B (de) | Kopierfraesmaschine | |
US20020157442A1 (en) | End-forming toggle-press | |
US2302531A (en) | Forging machine stock gauge | |
DE925933C (de) | Hydraulische Zwillingsmaschine zum Formen von Schuhschaeften | |
US3412595A (en) | Stock transfer mechanism |