Patents for B21D 24 - Special deep-drawing arrangements in, or in connection with, presses (1,969) |
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07/06/1994 | CN1025296C Method and device for pressing sheet material on elastic forming die |
06/23/1994 | DE4242442A1 Automatic, iterative optimisation of drawing processes in presses - with comparison of the noise emitted during drawing with stored reference values, and control of the holding-down force on the basis of the comparison outcome |
06/09/1994 | DE4240819A1 Press and method of generation - using pressure in pressure cushion to regulate pressure applied by moveable pressure table |
05/11/1994 | EP0596697A1 Device and method for measuring and adjusting pressing load values on a press |
05/11/1994 | EP0596696A1 Method and device for controlling, checking or optimizing pressure of cushion pin cylinders of press by discharging fluid or initial pressure |
05/04/1994 | EP0595417A1 Spring device |
05/03/1994 | US5307728 Control arrangement for regulating the speed of a pressure cylinder |
05/03/1994 | US5307665 Electromagnetic re-draw sleeve actuator |
04/28/1994 | DE4312589A1 Hydraulic press with shortened work time - with valve unit to control fluid flow during pressure build-up |
04/26/1994 | US5306190 Forming process for a sheet of perforated metal and process implementation device |
04/20/1994 | EP0592670A1 Method of preventing plungers from bottoming in die cushion pin pressure equalizing system |
04/05/1994 | US5299444 Hydraulic cushioning system for press, having hydraulic power supply including means for adjusting initial pressure to be applied to pressure-pin cylinders |
03/30/1994 | EP0589127A1 Leaf spring cambering apparatus |
03/30/1994 | EP0589066A1 Method for making products by force or pressure influenced drawing processes |
03/22/1994 | US5295383 Hydraulic cushioning system for press, having shut-off valve for disconnection of pressure-pin cylinders from power supply upon contact of movable die with workpiece |
03/16/1994 | EP0586669A1 Press with a hydraulic drive, in particular a sheet-shaping press |
03/10/1994 | DE4329554A1 Vehicle wheel with variable press-in depth - has adjustable axial gap in region of wheel fastening plane |
03/09/1994 | EP0585589A1 Method of automatic and iterative process optimization of drawing operations in presses |
02/23/1994 | CN2156962Y Constantforce edge press type double action die carrier |
01/19/1994 | EP0579119A1 Redraw carriage for crank and slide press |
01/18/1994 | CA1326172C Power press with improved cushioning system |
12/28/1993 | US5272898 Device for stamping materials in sheet form, especially sheet metal blanks |
12/16/1993 | DE4218953A1 Hydraulic drive for sheet metal forming machine - has differential cylinder for press piston, suction oil pump and delivery oil pump for two cylinder halves |
12/16/1993 | DE4218952A1 Hydraulic drive for sheet metal forming machine - has two differential cylinders for press pistons, suction oil pump and delivery oil pump for cylinder halves |
12/15/1993 | EP0573830A1 Hydraulic drawing system in a press |
12/01/1993 | EP0572301A1 Deep-drawing device for sheet material in a die made of resiliently deformable material |
11/28/1993 | CA2096461A1 Sheet materials punching device mounted on a flexible punch and die |
11/11/1993 | DE4214818A1 Hydraulic deflection compensation in deep drawing presses - with the hydraulic pressure varied according to the measured press load |
10/26/1993 | US5255552 Hydroelastic deep-drawing apparatus |
10/26/1993 | US5255550 Device for drawing sheet materials in particular sheet blanks |
10/20/1993 | EP0566431A1 Device for deep-drawing of a sheet blank |
10/20/1993 | EP0566308A2 Method and apparatus for adjusting press operating conditions depending upon dies used |
10/19/1993 | US5253505 Press with a drawing apparatus |
10/14/1993 | WO1993019866A1 Hydraulic drive for a press, in particular a sheet-shaping press |
10/13/1993 | EP0565347A2 Method and apparatus for measuring blank holding force acting on pressure ring of a press |
10/13/1993 | EP0564977A1 Run up control system for the pressure cheek in a drawing apparatus |
10/05/1993 | US5249448 Redraw carriage for crank and slide press |
09/28/1993 | US5247872 Multi-stage hydraulic actuator |
09/22/1993 | EP0561310A1 Apparatus for cold-deforming of plastic sheets, in particular polypropylene sheets of different thickness |
09/19/1993 | CA2091877A1 Tools for cold-forming plastics films, particularly polypropylene films of various thicknesses |
09/13/1993 | CA2088019A1 Plastic working method for a holed member |
09/07/1993 | US5241849 Drawing apparatus in the bedplate of a press |
08/25/1993 | EP0556390A1 Die cushion device of press machine |
08/17/1993 | US5235859 Control console for gas die cylinder systems |
07/21/1993 | EP0551624A1 Multi-stage hydraulic actuator |
07/14/1993 | CN2137997Y Metal plate curved shaping machine |
07/08/1993 | DE4200205A1 Deep drawing press for sheet metal workpieces - has hydraulic cylinder to support the workpiece whilst being deep drawn |
07/06/1993 | US5224370 Leaf spring cambering apparatus |
06/24/1993 | DE4142506A1 Tool for deep-drawing of formed sheet metal parts - has cylinder block on tool part, with working and master cylinders, and movable pressure plate |
06/23/1993 | EP0547153A1 Can body maker with magnetic ram bearing and redraw actuator |
06/22/1993 | US5220820 Apparatus and method for cushioning movement of a member in a press |
06/16/1993 | EP0546270A1 Method of transforming brittle material |
05/26/1993 | EP0543177A1 Hydraulic actuator |
05/19/1993 | EP0542552A1 Thickness-reduced draw-formed can |
05/19/1993 | DE4137398A1 Press for drawing with thrust bolts - transfers force to prevent tool displacement and avoids tool displacement during forming |
05/12/1993 | EP0541427A1 Device for press-forming sheet materials especially metal blanks |
05/05/1993 | CA2081962A1 Device for drawing sheet materials, in particular sheet metal blanks |
04/14/1993 | EP0536952A1 Method of draw-forming a metal sheet having an organic film |
03/25/1993 | DE4131603A1 Deep-drawing tool for sheet steel - has forming sleeve surrounding forming contour, between sheet holder and contour, and support on additional piston |
03/10/1993 | EP0531141A1 Hydraulic cushioning system for press, having shut-off valve for disconnection of pressure-pin cylinders from power supply upon contact of movable die with workpiece |
03/10/1993 | EP0531140A1 Hydraulic cushioning system for press, having hydraulic power supply including means for adjusting initial pressure to pressure-pin cylinders |
03/10/1993 | EP0530739A1 Control circuit for the control of the speed of a pressure cylinder |
02/04/1993 | WO1993001901A1 Electromagnetic re-draw sleeve actuator |
01/21/1993 | WO1993001012A1 Die cushion system in press |
01/07/1993 | DE4122128A1 Hydro-elastic deep drawing of sheet metal workpieces - uses system which automatically actuates punch mounted in baseplate, with metal blank being gripped between hold-down plates |
01/07/1993 | DE4121869A1 Deep drawing press with control of blank holding down pressure - metal blank held in place by number of vertical rods actuated by attached stepped pistons operating in correspondingly stepped cylinders |
12/29/1992 | US5174146 Method and device for forming a part in relief on a sheet metal blank |
12/23/1992 | WO1992022392A1 Die cushion pin pressure equalizing system, method of calculating peak oil pressure in the system and method of calculating service life of pressure equalizing hydraulic cylinders |
12/23/1992 | WO1992022391A1 Method of preventing plungers from bottoming in die cushion pin pressure equalizing system |
12/08/1992 | US5168738 Control system for a hydroelastic deep-drawing device |
12/02/1992 | EP0515881A1 Press with drawing device |
11/12/1992 | DE4115443A1 Press and tool for deep drawing of formed sheet metal parts - has hydraulic element, with rapid action coupling to hydraulic system of press |
11/05/1992 | DE4114496A1 Control system for sheet-metal deep drawing press - with the drawing velocity varied as a function of the sheet holder velocity |
10/28/1992 | EP0510507A1 Drawing device in the table of a press |
10/28/1992 | EP0510505A1 Drawing device in a press |
10/27/1992 | US5157969 Apparatus and method for hydroforming sheet metal |
10/07/1992 | CN1018528B Device for pressing sheet material |
09/17/1992 | DE4123517A1 Hydraulic press table flexure compensation for deep drawing press e.g. for vehicle body component mfr. - using detected flexure to adjust hydraulic support press |
09/10/1992 | DE4104136A1 Press for deep drawing of sheet metal workpieces - has hydraulic devices to control movement of punch and ram |
09/01/1992 | US5143747 Coating with organosilicon compound, doping with inert gas to transform to silicon carbide; wear resistance |
08/27/1992 | DE4105839A1 Deep drawing sheet metal press - has blank held in place by hydraulically loaded pressure plate |
08/25/1992 | US5140895 Valve mechanism for controlling a pressure difference between an upper and a lower chamber of a hydraulic cylinder for a die cushion for a press |
08/19/1992 | EP0499197A2 Improved die tooling for metal working and method for its production |
08/18/1992 | US5138857 Drawing device in a press for drawing shaped sheet-metal parts |
07/23/1992 | DE4101606A1 Plate holding force booster for press - has short stroke cylinders of multistage type engageable by several pressure levels via valves |
07/16/1992 | DE4100716A1 Sheet metal hold-down device in single-acting press - has mechanical device to couple power transmission element |
07/09/1992 | DE4100206A1 Hydroelectric deep-drawing device - has drawing die cushion plate with multi-point drive and short stroke piston |
06/24/1992 | EP0491602A1 Device for press-forming sheet materials and especially metal blanks |
05/21/1992 | DE4036408A1 Hydraulic system for sheet metal press - has one-way valves to connect cylinder chamber, and includes pressure reduction valve |
05/17/1992 | CA2030156A1 Dimpling machine |
05/03/1992 | WO1992007711A1 Die cushion device of press machine |
04/22/1992 | EP0455806A4 Apparatus and method for hydroforming sheet metal |
04/21/1992 | US5105645 Method of redrawing metal cup |
04/16/1992 | DE4128623A1 Piston and cylinder assembly |
04/16/1992 | DE4128610A1 Press assembly with cushion assembly and auxiliary device |
04/09/1992 | DE4128973A1 Blank holding down device for metal forming press - has four hydraulic cylinders with pressure controlled by pressure regulator |
04/09/1992 | DE4031645A1 Hydroelastic deep-drawing die-cushion control for press - provides unequal distances for accelerations of workpiece holder and die attaining identical speeds at synchronism point |
03/31/1992 | US5100113 Pneumatic die cushion equipment |
03/31/1992 | US5099673 Drawing apparatus in drawing stages of presses |
03/24/1992 | US5098071 Die spring apparatus |