Patents for B21D 37 - Tools as parts of machines covered by this subclass (19,804)
08/1991
08/07/1991CN1053567A Press die
07/1991
07/24/1991EP0437978A1 Stamping and forming machine having interchangeable punch subassembly
07/17/1991EP0436792A2 Press for making dimensionally stable pressed articles from particulate material
07/16/1991US5031483 Process for the manufacture of laminated tooling
07/03/1991EP0435722A1 Method and device for forming a sheet metal blank in particular for producing a mask for a cathode ray tube
07/02/1991US5027633 Box makers forms
07/02/1991CA1285465C Lower tool support for a stamping machine or the like
06/1991
06/19/1991CA2032456A1 Blank forming process and apparatus, namely for producing a cathode tube mask, and mask so produced
06/11/1991US5022256 Clamping device
06/04/1991US5020350 Apparatus and method for lubricating and cooling in a draw and iron press
05/1991
05/21/1991US5016458 Method and device for pressing sheet material with a deformable punch under a ram
05/15/1991EP0427012A1 Die set
05/15/1991CN1051317A Formation method for reducing guide pipe
05/08/1991EP0425532A1 Press for manufacturing sheet metal preforms in several stages
05/07/1991US5012712 Tool holder for punching tools
05/02/1991DE3935498A1 Metal forming press with multiple punches and dies - has mechanism to disengage drive to one or more punches
05/02/1991CA2027263A1 Quick change tooling for press machine
04/1991
04/24/1991EP0424190A1 Tool outfit comprising a pair of articulated tongs with an undercut system
04/24/1991CN2075560U Miniature multi-working position progressive die
04/23/1991US5009095 Method for forming a collared hole in sheet material
04/17/1991CN2075114U Motor piece punching die with positioning pin
04/17/1991CA2000836A1 Roll former with quick automated tool changer
04/16/1991US5007814 Device for separating and closing a split mold having two halves
04/16/1991US5007282 Stamping and forming machine having interchangeable punch sub-assembly
04/16/1991US5007275 Progressive die for drawless fin
04/02/1991US5003809 Method of mounting and demounting molds to and from press molding machine
03/1991
03/27/1991EP0418893A2 Method of machining a press die
03/26/1991US5001922 Quick change tooling for press machine
03/26/1991CA1282143C Microprocessor controlled hydraulic system for clamping a die to apress
03/21/1991CA2025694A1 Tooling comprising tongs with two pivoted arms, with a release system
03/20/1991EP0417311A1 Process for producing mold
03/20/1991CN2073330U Auto-oil filler type perforating press
03/20/1991CN2073329U Sheet stamping device of punching machine
03/19/1991US5000022 Presswork machinery
03/12/1991WO1991003334A1 Process for the improvement of the deep-drawing property of sheet metal or of a sheet metal blank
03/12/1991US4998428 Method of cleaning stamping dies
03/12/1991CA2066438A1 Metal sheet or blank stamping
03/06/1991EP0210195B1 Ball-point writing instrument containing an aqueous ink composition
02/1991
02/26/1991US4995289 Die assembly having improved insert retaining system and having reversible die inserts
02/26/1991US4995255 Method of changing dies for a press machine
02/19/1991US4993255 Device for fixing an elongated part such as punch, die or similar tool on the platen of a bending-press
01/1991
01/22/1991US4985983 Sheet working machine with tool magazine
01/22/1991CA1279229C Reinforced plastic retainer rings for sheet metal forming
01/16/1991CN2069316U Bellows processing device
01/14/1991WO1991000784A1 Arrangement at press line
01/14/1991CA2063585A1 Arrangement at press line
01/09/1991EP0407039A1 Die assembly having improved insert retaining system and having reversible die inserts
01/01/1991US4981061 Steel rule die and method of manufacture
12/1990
12/26/1990CN1010930B Fabrication technique and application of fully steel-rimmed epoxy plastic dies
12/19/1990EP0403065A2 Plastics tooling with compression adjustment
12/18/1990US4977804 Punch press
12/18/1990US4977772 Method and apparatus for forming reforming and curling shells in a single press
12/16/1990CA2012135A1 Plastic tooling with compression adjustment
12/11/1990US4976400 Plastic tooling with compression adjustment
12/04/1990US4974434 Controlled shot peening
11/1990
11/22/1990EP0398486A2 Box makers forms
11/21/1990CN1047044A Die for sheet press work
11/20/1990US4970888 Method of changing workpiece holders for press machine
11/14/1990EP0396991A1 Machining device for inserting in a press
11/14/1990CN2065516U Simultinuous same position drilling and pressing die for aluminium cover
11/08/1990DE3914762A1 Multipurpose metal forming machine tool - has rotatable tool holder to bring required tool into operation
10/1990
10/31/1990CN2064689U Adjusting plate splice die
10/30/1990CA1275634C 180 degres inverting machine
10/18/1990WO1990011846A1 Removable slide presses
10/17/1990EP0392795A2 Die exchange apparatus for the use of a press brake
10/13/1990CA2006903A1 Removable slide presses
10/10/1990CN1009947B Mould lubricant exbausting apparatus for knocking-out mechanism
10/09/1990CA1275012A1 Simplified construction of tooling to extend the use of serial tools in the manufacturing process of short and medium runs of metal articles
10/04/1990WO1990011145A1 Ceramic wall-ironing tool and method for manufacturing same
10/03/1990EP0390355A1 Maintaining a preferred vibration mode in an annular article
09/1990
09/28/1990CA2012930A1 Maintaining a preferred vibration mode in an annular article
09/27/1990DE4016837A1 Separating upper and lower parts of tool set - by using additional guide bars to prevent canting of upper tool
09/26/1990EP0388644A2 Sheet metal punching machine
09/26/1990EP0388415A1 Use of a tool steel for tools for pressing motor car sheet steel.
09/20/1990WO1990010512A1 Process for producing mold
09/19/1990EP0387349A1 Sheet metal pressing resin mold and method of manufacturing same
09/12/1990EP0387121A1 Clamping device for a long piece such as a punch, a die or such a tool on a table of a press bending machine
09/12/1990EP0386046A1 Drive module for tool aggregates
08/1990
08/28/1990US4951375 Punch press utilizing workpiece guidance system to effect tool changing
08/23/1990DE3905047A1 Apparatus for drawing sheet metal, in particular for manufacturing stainless-steel sinks
08/22/1990CN2060700U Connector type cold stamping die set frame
08/15/1990CN1009170B Method for processing die by coating technique
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
08/14/1990US4947673 Removable slide presses
08/08/1990EP0380894A1 Device for deep-drawing sheet materials
08/07/1990US4945752 Tool carrier for a punch or stamping machine
08/07/1990US4945629 Vertical carrousel
08/02/1990DE4002528A1 Stanzwerkzeug Punch
07/1990
07/25/1990CN2059605U Hydraulic synchronized stretch assembling die
07/18/1990EP0377865A2 Punching and nibbling machine fitted with a device for an automatic quick tool change
07/18/1990CN1043893A Device for pressing sheet material
07/17/1990US4941344 Die sets
07/11/1990CN2059109U Multi-purpose oblique wedge angled mould
07/11/1990CN1043646A Method and device for pressing sheet material with deformable punch under ram
07/11/1990CN1043645A Method and device for pressing sheet material on elastic forming die
07/04/1990EP0376809A1 Method and device for deep-drawing sheet materials on an elsatic formation lower die
07/04/1990EP0376808A1 Method and device for deep-drawing sheet materials with a stamp deformable underneath a plunger