Patents for B21D 28 - Shaping by press-cutting; Perforating (12,707)
02/1989
02/07/1989US4802603 For carbonated beverages
02/07/1989US4802393 Piercing die
01/1989
01/26/1989WO1989000465A1 Tooling for forming machines having improved guidance, tool mounting, and pilot pin systems
01/25/1989EP0300000A1 Press drive.
01/24/1989US4799612 Foot-operated press
01/10/1989US4797531 Cutting press
12/1988
12/27/1988US4793063 Punch gun
12/21/1988CN88201337U Adjustable assembling die used for back-flap
12/20/1988US4791844 Knockout device for punching a work plate in a press-machine
12/15/1988WO1988010017A1 Electro-discharge machining electrode and method of forming
12/14/1988EP0294765A1 Precision punching machine and associated tool change method
12/01/1988WO1988009232A1 Rotatable multi-tool holder and a machine tool provided with such a holder
11/1988
11/29/1988US4787283 Metal stud and channel cornering die
11/29/1988US4787282 Method and apparatus for forming by punching
11/23/1988EP0292357A1 Method for cutting thin sheets, in particular metal plates, and elastomeric material used in this method
11/22/1988US4785655 Method and arrangement for producing knockouts for electrical equipment cabinets
11/16/1988CN87204982U Dies of punching rectangular small hole for modified phenolic cotton paper board
11/15/1988US4783982 Apparatus and method for trimming a can body
11/08/1988US4782998 Method and apparatus for press-cutting various patterns
11/08/1988US4782678 Method for minimizing scrap loss in making a drawn container
11/01/1988CA1243826A1 Method and apparatus for making tubes formed with holes in their peripheral walls
10/1988
10/25/1988US4779443 Complex pressing die apparatus
10/05/1988EP0284682A2 Punch gun
10/04/1988US4775135 Apparatus and method for clamping and positioning workpiece in machine tools
10/04/1988US4774865 Die stamping system
09/1988
09/29/1988DE3709052A1 Piercing device for correcting the fastening holes on mudguards for motor vehicles
09/28/1988EP0284217A1 Malfunction detector
09/27/1988US4773250 Module-type forming machine
09/20/1988US4771663 Multistroke punching method and apparatus therefor
09/14/1988EP0281777A1 Cutting press
09/13/1988US4770572 Press for manufacturing helical gears
08/1988
08/30/1988US4766707 Strip of loosely connected hold down clips
08/17/1988EP0278046A1 Device for stamping complex matrix figures out of a metallic strip
08/16/1988US4763551 Punching devices
08/16/1988US4763550 Self equalizing piercing machine
08/16/1988US4763501 Punch-probing device on a cross transfer press
08/11/1988WO1988005724A1 Press drive
08/11/1988WO1988005699A1 Method for sequentially continuous machining of sheet pieces from sheet material
08/09/1988US4762043 For punching holes in workpieces
08/03/1988EP0276634A1 Method and installation for manufacturing work pieces
07/1988
07/27/1988EP0176510B1 Apparatus for briefly storing and impulsively releasing mechanical energy
07/19/1988US4757734 Balancing means in a punching machine
07/14/1988DE3743041C1 Method for producing a frame element consisting of interconnected hollow-profile beams and punching device for carrying out the method
07/14/1988DE3640447C1 Method and apparatus for punching and stacking
07/12/1988US4756630 For punch presses
07/06/1988EP0273690A2 Knockout device for punching a work plate in a press-machine
07/06/1988EP0273431A2 Turret punch press machine
07/05/1988CA1238775A1 Multiple processing machine
06/1988
06/23/1988DE3734701C1 Method for the stop-limited cutting of workpieces
06/22/1988EP0272175A1 Press tool for displacing the punches in a direction which differs from the working direction of the press
06/14/1988US4750393 Method for punching a cylindrical tube
06/07/1988US4748883 Apparatus for setting the working stroke of a punching machine
06/01/1988EP0269050A2 Fastening assembly for piercing pins in a paper blanks perforating unit
05/1988
05/25/1988EP0268534A1 Die for a press tool for guiding and positioning a profile in order to punch it
05/18/1988EP0267287A1 Numerically controlled punch press
05/17/1988US4744276 Method and apparatus for producing punched tube
05/11/1988EP0267115A2 Piercing die
05/11/1988EP0266626A2 Lower tool holder for a die or the like
05/11/1988EP0266625A2 Upper tool holder for a punch or the like
05/11/1988EP0266624A2 Upper tool holder for a punch or the like
05/11/1988EP0266623A2 Upper tool holder for a punch or the like
05/10/1988US4743900 Device for releasing control signals for a machine tool
05/05/1988WO1988003081A1 Cylinder assembly, especially for punching or nibbling machines
05/04/1988EP0265589A2 Stamping press
05/03/1988US4741084 Conversion of mechanical punch presses to hydraulic punch presses
04/1988
04/26/1988US4739687 Punch
04/19/1988US4738173 Shearing in punch press and die therefor
04/19/1988US4738020 Method for manufacture of laminated parts
04/19/1988CA1235370A1 Process and device for laterally perforating metallic pieces, particularly pressed pieces
04/07/1988WO1988002286A1 Method and device for moving a tool to exact shaping or working engagement with a strip of material having a repeated basic shape
03/1988
03/30/1988EP0262106A2 Method and device for moving a tool to exact shaping and working engagement with a strip of material having a repeated basic shape
03/30/1988EP0261805A2 Foot-operated press
03/30/1988CN86107871A Scrapless shaping die for making multipiece circlips used in holes
03/22/1988US4732220 Apparatus for briefly and impulsively releasing mechanical energy
03/22/1988US4732028 For forming strip material
03/17/1988DE3631457A1 Punching machine
03/16/1988CN87202617U New type hingeed slice leapfrog former
03/15/1988US4730392 Hydraulic punch tool for heat exchangers
03/09/1988EP0258329A1 Punching and bending machine for wires and strips.
03/02/1988EP0258209A2 Device for punching sheet metal
03/02/1988EP0257674A2 Punching or stamping machine
02/1988
02/23/1988US4726270 Removing a punch from a retainer block
02/16/1988US4724616 Panel punch
02/09/1988US4723360 Rotary apparatus of die unit for manufacturing core lamination assembly
02/04/1988DE3625895A1 Counter-holder for the slide of a hydraulic press
02/03/1988CN87202532U Disk blank cutting device
02/02/1988US4722125 Method for producing a tungsten carbide tip punch
01/1988
01/19/1988US4719830 Apparatus for controlling heat deformation of a turret punch
01/19/1988US4719691 Tool change mechanism for punch presses and the like
01/13/1988EP0252635A2 Complex pressing die apparatus
01/12/1988US4718161 Press tool comprising interchangeable working parts
01/07/1988EP0251796A2 Improvements in or relating to punches and presses
01/07/1988EP0251628A1 Improvements relating to metal slitting and stamping
01/05/1988US4716803 Self-equalizing piercing machine
12/1987
12/29/1987US4715203 For thrusting an attached mandrel through a hole in a metal workpiece
12/23/1987EP0249862A2 Method of and apparatus for producing punched tube
12/22/1987US4714849 Linear stepping motor
12/22/1987US4714814 Welding machine for welding tongues onto sheet-metal members
12/16/1987CN87103917A 辊轧成型机 Roll forming machine
12/08/1987US4711115 Method for forming memory discs by forging