Patents
Sitemap › 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 › B21D 28 - Shaping by press-cutting; Perforating
Patents for B21D 28 - Shaping by press-cutting; Perforating (12,707)
12/1990
12/19/1990CN2067614U Bimetal nesting die without scrap
12/18/1990US4977804 Punch press
12/11/1990US4976180 Revolving cutting press
12/05/1990EP0400345A1 Fixing element
12/04/1990US4974479 Punch and die set having improved slug management system
12/04/1990US4974436 Cutting tool to facilitate bending of hollow tubing
12/04/1990US4974309 Method of making a pulser generating ring for electromagnetic rotary position detection
11/1990
11/28/1990EP0399339A1 Marking tool holder for a punch press
11/28/1990EP0399338A1 Multitool punch holder
11/28/1990EP0399337A1 Multitool punch holder
11/28/1990CN2066359U Perforating-shaping device
11/28/1990CN1010563B Method and apparatus for vehicle body panel attachment
11/22/1990EP0398253A1 Punch holder with a stripper arrangement
11/20/1990US4970925 Die press with automatically controlled workpiece holder
11/20/1990US4970923 Providing a continuous side edge on a thin plate
11/14/1990EP0396991A1 Machining device for inserting in a press
11/14/1990EP0396876A1 Turret punch press with rotatable tool
11/14/1990EP0396817A2 Indexable multi-tool for punch press
11/07/1990EP0395964A1 Apparatus for balancing inerta forces in a crank operated machine, in particular a punching machine
11/06/1990US4967579 Adjustable guide for rotating cylindrical member
11/06/1990CA1275910C Indexable punch and die holders for turret punches
10/1990
10/30/1990US4966023 Staged tool for boring a hole in an element by axial penetration of the tool
10/30/1990CA1275586C2 Bowed external spring retaining ring of the e-shaped type
10/23/1990US4964328 Notching blade assembly
10/23/1990US4964326 Machine tool
10/17/1990EP0392039A1 Steel strip for concrete reinforcement
10/10/1990EP0391114A1 Device for punching out and forming butterfly-clamps from steel strip
10/04/1990DE3926018A1 Hand punch for holes in wall of hollow punch - has punching matrix with two different abutment planes for support body and cutting segments respectively
10/02/1990CA1274765A1 Pipe cutting and crimping
09/1990
09/26/1990EP0388644A2 Sheet metal punching machine
09/26/1990CN2062659U Micropore punching dies
09/25/1990US4958548 Hydraulic drive mechanism
09/19/1990EP0387884A2 Stamping and forming machine having toggles for reciprocating the tooling assemblies
09/12/1990CN2061874U Automatic punching die for miniature hole metal plate screen
09/04/1990WO1990009882A1 Control apparatus and method for progressive fracture of workpieces
08/1990
08/28/1990US4951537 Apparatus for producing a blank from stock material
08/21/1990US4950861 Combination punch press and laser cutting machine with movable slag and fume collector
08/21/1990US4949614 Punch and die set
08/21/1990US4949449 Quick release rotary punch
08/14/1990US4947720 Die improvement
08/14/1990US4947719 Punch and die system
08/14/1990US4947718 Punch and die system
08/14/1990US4947717 Punch and die system
08/14/1990US4947716 Punch and die system
08/07/1990US4945954 Method and apparatus for aligning mating form tools
08/07/1990US4945796 Method of punching material
07/1990
07/25/1990EP0378601A1 Composite tool
07/25/1990EP0182917B1 Device for preventing collision of work holder with tool in numerical control system for turret punch press
07/18/1990EP0377865A2 Punching and nibbling machine fitted with a device for an automatic quick tool change
07/10/1990US4940880 Combination punch press and laser cutting machine with laser beam generator mounted thereon
07/05/1990DE3844086A1 Punching device
06/1990
06/26/1990US4936013 Mechanical heat exchanger punch tool and method
06/19/1990US4934230 Die stamping system
06/19/1990US4934173 Stamping and forming machine having toggles for reciprocating the tooling assemblies
06/19/1990US4934169 Method for moving a tool to exact shaping or working engagement with a strip of material having a repeated basic shape
06/13/1990EP0372533A2 Production process for metal work pieces
06/12/1990US4932129 Casing punch for wells
06/12/1990US4932128 Mechanical force enhancer
06/07/1990CA2004737A1 Method for producing workpieces of metal
06/05/1990US4930384 Die for notching hollow tubing
05/1990
05/31/1990WO1990005601A1 Turret punch press
05/30/1990CN1008148B Scrapless shaping die making multipiece used in holes
05/29/1990US4929276 Multitool punch holder
05/29/1990US4928377 Machine tool
05/17/1990DE3826530A1 Machine tool
05/16/1990EP0367920A2 Machine tool
05/16/1990EP0367919A2 Machine tool
05/15/1990US4925079 Apparatus for correctly feeding continuous strips with a shaped side outline to blanking machines
05/09/1990CN2056873U Roller for forming horizontal under-track of shutter and products thereof
05/09/1990CN1041894A Bloking die cutting method and locating device
05/08/1990US4922615 Punching tool
05/08/1990CA2001662A1 Machine tool
05/08/1990CA2001661A1 Machine tool
05/02/1990EP0366064A2 Multiple punching press
05/02/1990CN2056615U Perforating machine between insulation turns
05/01/1990US4920782 Press drive
04/1990
04/26/1990DE3836288A1 Tool-holding and -changing device
04/25/1990EP0364715A1 Device for adjusting the stroke of a press ram of a punching machine
04/25/1990CN2056366U Combined hole punching device
04/25/1990CN1041671A Working method of disk motor iron core and punching apparatus
04/18/1990EP0364300A2 Rotary die cutter
04/18/1990EP0363474A1 High-speed press control system
04/17/1990US4918364 Method for controlling noise and vibration of machine tools with high efficiency
04/17/1990US4916990 Method for controlling the path of a punching tool
04/10/1990US4915161 Fin removing method and apparatus
04/04/1990EP0362144A2 Notching blade assembly
04/03/1990US4912960 Automatic precision stamping press and method for changing tools
03/1990
03/21/1990CN1040525A Development method of geometrically undevelopable curved surface and its application in processing of curved surface
03/21/1990CN1040524A Pressing machine for manufacturing metal product
03/20/1990US4908924 Process for producing a part of torque converter
03/13/1990US4907481 Powered press with manual punch and die alignment capability
03/13/1990US4907480 Turret punch press machine
03/06/1990US4906809 Metal slitting and stamping
03/06/1990US4905557 Non-circular slug splitter punch
03/06/1990US4905556 Blanking press
03/06/1990US4905553 Tube working apparatus
02/1990
02/28/1990EP0356188A2 Die stamping system
02/28/1990EP0183648B1 Press for processing work pieces made from metal
02/27/1990US4903560 Punching devices
02/22/1990WO1990001381A1 Rotary punching machine
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