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 24 - Special deep-drawing arrangements in, or in connection with, presses
Patents for B21D 24 - Special deep-drawing arrangements in, or in connection with, presses (1,969)
03/1992
03/18/1992EP0475923A1 Device for regulating the force of the blank holder in a press
03/08/1992WO1992004142A1 Can body maker with magnetic ram bearing and redraw actuator
03/08/1992CA2090875A1 Can body maker with magnetic ram bearing and redraw actuator
03/04/1992EP0460112A4 Can body making apparatus
03/03/1992CA1296581C Method and device for press-forming sheet metal
02/1992
02/18/1992US5088698 Sealing construction for a gas spring
01/1992
01/21/1992US5081859 Device for pressing sheet material on an elastic forming die
12/1991
12/31/1991CA1293652C Forming of metal articles
12/11/1991EP0460112A1 Can body making apparatus
12/04/1991CN1056641A Apparatus and method for hydroforming sheet metal
11/1991
11/28/1991DE4016838A1 Press drawing tool - comprises pressure platen, and workpiece holding cylinders holding constant distance between press RAM and plate via pressure pins, etc.
11/26/1991US5067336 Device for pressing sheet material
11/19/1991US5065607 Piston and cylinder assembly
11/19/1991US5065606 Press assembly with cushion assembly and auxiliary apparatus
11/13/1991EP0455806A1 Apparatus and method for hydroforming sheet metal.
10/1991
10/30/1991EP0453955A1 Drawing device in a press for drawing of sheet metal formed parts
10/29/1991CA1291372C Drawing mechanism for a press
10/24/1991DE4112656A1 Drawing device for press - has pressure face, charged by different forces during drawing
10/22/1991CA1291003C Single action cylinder
10/09/1991EP0451013A1 Method and apparatus for making an embossed part in a sheet metal plate and product obtained by this method
09/1991
09/24/1991CA1289417C Drawing apparatus in a press
09/19/1991DE4038864A1 Deep drawing limit ration increase process - with constant holding-down force dependent upon fold formation
09/19/1991DE4008377A1 Hydro-elastic deep drawing unit for sheet metal parts - improves prod. quality by using multipoint control via. several pressure cylinders
09/03/1991CA1288292C Die clamp
08/1991
08/08/1991DE4003016A1 Hydraulic system for forming drawing and shaping tools - has adjustable one-way pressured reduction valve in accumulator coupling pressure line
07/1991
07/31/1991EP0438774A1 A method of pressing sheet metal and a hydraulic press for carrying out the method
07/23/1991CA1286698C Die spring construction
07/18/1991DE4038867A1 Deep drawn sheet metal workpieces - are mfd. by continuous adjustment of holding down force of sheet metal blank
07/18/1991DE4038866A1 Controlling sheet metal deep drawing operation - by continuously adjusting pressure on holding-down ring
07/10/1991EP0300000B1 Press drive
07/02/1991US5027637 Die cushion for applying pressure to a press machine via gas pressurized push rods
06/1991
06/19/1991EP0433203A1 Method and apparatus for drawing conical containers and containers so obtained
06/13/1991WO1991008065A1 Apparatus and method for hydroforming sheet metal
05/1991
05/21/1991US5016458 Method and device for pressing sheet material with a deformable punch under a ram
05/16/1991DE3937733A1 Plate draw press - has adjustment to vary free piston movement range before the plate is inserted
05/15/1991EP0427468A1 Gas spring
05/11/1991CA2027646A1 Die cushion equipment for press
05/09/1991CA2028573A1 Gas spring
05/08/1991EP0425532A1 Press for manufacturing sheet metal preforms in several stages
05/02/1991DE4006101A1 Protection system for double acting press - has piston cylinder unit with mechanism to uncouple plunger and piston rod
04/1991
04/25/1991DE4032338A1 Drawing appts. in press drawing stages
04/24/1991EP0424122A1 Die cushion equipment for press
04/17/1991EP0422491A1 Drawing device in drawing stages of presses
04/16/1991US5007276 Seal arrangement for use in a press assembly
04/02/1991US5003807 Press assembly and method of operation
03/1991
03/20/1991EP0417754A2 Mechanical or hydraulic press with drawing or pressing station for multiple stage press
03/20/1991EP0417753A2 Mechanical or hydraulic press with drawing or pressing station for multiple stage press
03/20/1991EP0417752A2 Mechanical or hydraulic press with drawing or pressing station for multiple stage press
03/14/1991DE4028921A1 Deep drawing press - has hydraulic accumulator to supply pressure medium during end part of working stroke
03/14/1991DE4028920A1 Deep drawing press - has auxiliary piston cylinder units to impart acceleration to press ram at end of its stroke
03/14/1991DE4028919A1 Hydraulic deep drawing press - has accumulator to supply pressure medium to cylinders for initial acceleration of pressure plate
03/05/1991US4996864 Plate-type workpiece
02/1991
02/12/1991CA1280039C Drawing installation for a press
01/1991
01/09/1991EP0406792A1 Control switch connection for the upward stroke of the pressure cheek of a deep drawing device
12/1990
12/19/1990EP0402800A1 Pressure cheek in the drawing apparatus of a press
12/12/1990EP0401534A1 Hydraulic drawing system in a single or double working press
11/1990
11/15/1990DE3915794A1 Deep drawing press with workpiece holder - is actuated by hydraulic pistons with arrangement to vary applied force
08/1990
08/28/1990WO1990009851A1 Can body making apparatus
08/08/1990EP0380894A1 Device for deep-drawing sheet materials
08/02/1990DE3935011A1 Drive for mechanical press - operates with high-speed stroke, low impact speed during tool closing
08/01/1990EP0379875A2 Device for manufacturing a sealing diaphragm
07/1990
07/18/1990CN1043893A Device for pressing sheet material
07/18/1990CN1043892A Drawing machine
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
07/05/1990DE3933728A1 Einfachwirkender zylinder Single acting cylinder
07/05/1990DE3348231C2 Arrangement on tools or presses for drawing sheet-metal shaped parts
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
07/04/1990EP0376240A1 Drawing press
06/1990
06/30/1990CA2006772A1 Method and device for pressing sheet material on an elastic forming die
06/05/1990US4930336 Single action cylinder
05/1990
05/01/1990US4920782 Press drive
04/1990
04/25/1990EP0365317A1 Pneumatic die cushion equipment
03/1990
03/20/1990US4909061 For deforming blanks
02/1990
02/13/1990US4899572 Pneumatic-hydraulic booster type driving device for the cushion-knockout mechanism associated with the slide of a press-machine
02/08/1990WO1990000943A1 Press for manufacturing sheet metal preforms in several stages
01/1990
01/31/1990EP0245349B1 Apparatus for trimming a flanged end of a tubular article
01/30/1990US4896594 Drawing installation for a press
01/24/1990EP0351741A1 Press for making sheet metal parts in several steps
11/1989
11/28/1989CA1263300A1 Apparatus for trimming a flanged end of a tubular article
10/1989
10/18/1989EP0337156A2 Die spring construction
10/17/1989US4873859 Apparatus for controlling movement in a single action forming press
09/1989
09/21/1989DE3907702A1 Drawing tool for forming sheets
09/21/1989DE3807683A1 Drawing apparatus in drawing stages of presses
09/20/1989EP0333052A2 Drawing apparatus for shaping sheet metal blanks
09/06/1989EP0330718A1 Circuit for controlling the holding forre of a blank holder in a deep drawing press
08/1989
08/29/1989US4860571 Power press with improved cushioning system
07/1989
07/06/1989DE3835376A1 Hydraulic blank holder for single-acting presses
07/06/1989DE3744177A1 Method for deep-drawing blanks, in particular deep-drawn sheets for motor-vehicle body elements
07/04/1989US4844429 Die spring construction
06/1989
06/22/1989DE3835470A1 Return control system for die cushions on presses
06/22/1989DE3835414A1 Ejector force control of a die cushion for presses
06/20/1989US4840055 Drawing apparatus in a press
05/1989
05/30/1989US4833903 Method and device for press-forming sheet metal
05/18/1989DE3737967A1 Pneumatic drawing device for presses with controlled shock damping between the pressure cheek and the pressure cylinder of the drawing device
05/02/1989US4825681 Pneumatic press counterbalance and cushion construction
04/1989
04/26/1989EP0312809A2 Double action press for drawing sheet components
04/26/1989EP0312808A2 Press for drawing sheet components
04/18/1989US4821552 Drawing mechanism for a press
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