Patents for B21D 24 - Special deep-drawing arrangements in, or in connection with, presses (1,969)
12/1996
12/18/1996CN1137955A Pressing method and system
12/11/1996CN1137427A Pressing method and system
11/1996
11/27/1996EP0744230A1 Pressing method and system wherein cushion plate is lowered by shock absorbers arranged between the die and the cushion plate before holding of the blank between the die and the pressure ring
11/27/1996CN1136480A Stretch controlled forming mechanism and method for forming metal blanks
11/20/1996CN1135943A Method and apparatus for deep drawing
11/19/1996US5575170 Tooling apparatus and method for high speed production of drawn metal cup-like articles
11/06/1996EP0740968A1 Pressing method and system wherein cushion pin load is detected by load detector for diagnosis for even distribution of blank holding force
11/06/1996CN1134860A Hydraulic deep dawing equipment of a pressing machine for mfg. streched thin plate former
11/02/1996CA2175407A1 Pressing method and system wherein cushion pin load is detected by load detector for diagnosis for even distribution of blank holding force
10/1996
10/31/1996WO1996033825A1 Improved rotary cup infeed
10/29/1996CA2102363C Device and method for measuring and adjusting pressing load values on a press
10/22/1996US5566567 Rotary cup infeed
10/16/1996EP0737278A1 Liquid spring for punch press
10/02/1996DE19511379A1 Hydraulic deep-drawing unit for mfr. of two-compartment rinsing bowls
10/02/1996DE19511378A1 Hydraulic deep-drawing unit for mfg. two compartment rinsing bowls
10/02/1996CN1132125A Steel drum plug prodn. tech and die
09/1996
09/25/1996EP0733435A2 Method of diagnosing pressing machine based on detected physical value as compared with reference
09/11/1996EP0730919A2 Method of and apparatus for deep drawing
09/03/1996US5551274 Impact absorption for stamping press
08/1996
08/27/1996US5549281 Liquid spring for punch press
08/15/1996WO1996024449A1 Deep-drawing tool with integral holding-down device
08/14/1996CN1128686A Apparatus for deep drawing sheet metal
08/08/1996DE19503874A1 Tiefziehwerkzeug mit integriertem Niederhalter Deep drawing tool with integrated low-holders
07/1996
07/30/1996US5540073 Method and apparatus for adjusting press operating conditions depending upon dies used
07/24/1996EP0556390B1 Die cushion device of press machine
07/10/1996CN1126451A Coolant spacer ring
07/03/1996CN2230195Y Structure-improved buffer cylinder of punch buffer
06/1996
06/26/1996EP0718055A1 Apparatus including mutually communicating hydraulic cylinders for even distribution of blank-holding force on pressing machine
06/25/1996US5528918 Method and apparatus for adjusting pressure of cushioning pneumatic cylinder on press when cushion platen is at setup position
06/19/1996EP0716916A1 Method for adjusting the impact of upper and lower tools in a press, damping the noise, and slide drive with a device using the method
05/1996
05/29/1996EP0713735A1 Length compensation means in a clamping device between the upper and lower tool of a press
05/28/1996US5519934 Method and apparatus for local forming of brittle material
05/21/1996US5517759 Method of making a variable off-set full face wheel
05/15/1996CN1122267A Hydraulic stretching apparatus of pressing machine for stretching thin plate formed products
04/1996
04/17/1996EP0706844A2 Device for deep-drawing of sheet metal
04/04/1996DE4435069A1 Hydraulic deep drawing unit for presses
03/1996
03/27/1996EP0703018A1 Mechanical or hydraulic press
03/19/1996US5499525 Hydraulic drive for a sheet metal forming press
03/06/1996EP0699899A2 Apparatus for measuring blank holding force acting on pressure ring of a press
02/1996
02/29/1996WO1996005923A1 Wiping unit for ram of bodymaker
02/29/1996CA2198349A1 Wiping unit for ram of bodymaker
02/28/1996EP0455806B1 Apparatus and method for hydroforming sheet metal
02/07/1996EP0695225A1 An apparatus in a hydraulic press
01/1996
01/31/1996EP0694353A2 Improved die tooling for metal working
01/18/1996WO1996001159A1 Safety circuit for a press die cushion
01/17/1996EP0692323A2 Press having cushioning cylinders each having two chambers whose pressure difference is adjustable to control blank-holding force
12/1995
12/26/1995US5477723 Device for regulating the blank-holding force in a press
12/14/1995DE4419676A1 Simplified, energy-saving hydraulic under-clamp for sheet metal pressing
12/05/1995US5471861 Method and apparatus for diagnosing press cushioning device, on optimum range of blank-holding force
11/1995
11/29/1995EP0548343B1 Electromagnetic re-draw sleeve actuator
11/14/1995US5465602 Press die assembly
11/14/1995US5465601 Ram for long stroke press
11/09/1995DE4415577A1 Compensator for deflection in metal forming presses
10/1995
10/31/1995US5463558 Method for designing a binder ring surface for a sheet metal part
10/17/1995US5457980 Method and device for controlling, checking or optimizing pressure of cushion pin cylinders of press by discharging fluid or initial pressure
10/03/1995US5454549 Spring device
09/1995
09/27/1995EP0673696A1 Press having gas cylinders or plastically deformable members for even distribution of blank-holding force on pressure member through cushion pins
09/27/1995EP0673695A1 Method and control arrangement for interrupting and continuing of the drawing process in double acting presses, in particular hydraulic presses
09/20/1995CN1108762A Method of diagnosing pressing machine based on detected physical value as compared with reference
09/19/1995US5450756 Device and method for measuring and adjusting pressing load values on a press
09/14/1995WO1995024283A1 Improved lightweight ram for bodymaker
09/12/1995US5450347 Method for the automatic, interactive process optimization of drawing processes in presses
09/12/1995US5448902 Method for the automatic iterative process optimization of drawing processed in presses
08/1995
08/22/1995US5442947 Tooling apparatus and method for high speed production of drawn metal cup-like articles
08/10/1995DE4403954A1 Multi-point drawing installation of mechanical and hydraulic presses
08/10/1995DE19500245A1 Design of jack contact surface in sheet metal press
07/1995
07/27/1995WO1995020111A1 Liquid spring for punch press
07/26/1995EP0664168A1 Device for deep-drawing of a sheet metal blank
07/25/1995US5435166 Die cushion device for press
07/18/1995US5433099 Method of draw-forming a metal sheet having an organic film
06/1995
06/14/1995CN1028846C Apparatus and method for hydroforming sheet metal
06/07/1995CN1028725C Drawing machine
05/1995
05/30/1995US5419169 Method and apparatus for adjusting press operating conditions depending upon dies used
05/24/1995DE4339153A1 Method of regulating the force applied to sheet during deep drawing
05/24/1995DE4338828A1 Method for automatic process-optimal control of deep drawing on presses and corresponding deep drawing press
05/23/1995US5417097 Process and apparatus for press forming
05/02/1995US5410946 Hydraulic press machine
04/1995
04/19/1995CN1101594A Method and apparatus for diagnosing press cushioning device, on optimum range of blank-holding force
03/1995
03/21/1995US5398572 Press die assembly and method for producing the same
02/1995
02/14/1995US5390127 Method and apparatus for predicting post-buckling deformation of sheet metal
01/1995
01/25/1995EP0635320A1 Pressure pad for single-acting presses in particular for mechanical and transfer presses
01/03/1995US5379227 Method for aiding sheet metal forming tooling design
12/1994
12/13/1994US5372026 Apparatus and method for hydroforming sheet metal
12/08/1994WO1994027758A1 Coolant spacer ring
11/1994
11/30/1994EP0626223A1 Method and apparatus for adjusting pressure of cushioning pneumatic cylinder pressure on press, when cushion platen is at its setup position
11/24/1994DE4316960A1 Reciprocating shears for the transverse cutting of profiled plates or plate profiles
11/08/1994US5361617 Device for drawing sheet material on a drawing die composed of elastically yieldable material
11/08/1994US5361615 Apparatus for measuring blank holding force acting on pressure ring of a press
11/02/1994EP0622133A1 Method and apparatus for diagnosing press cushioning device, on optimum range of blank-holding force
11/01/1994US5360649 Thickness-reduced draw-formed can
10/1994
10/27/1994WO1994023862A1 An apparatus in a hydraulic press
10/25/1994US5357844 Run-up control for the pressure cheek in a drawing apparatus
09/1994
09/15/1994WO1994020236A1 Tooling apparatus and method for high speed production of drawn metal cups
09/14/1994EP0614711A1 Process and device for drawing metallic blanks for the manufacture of so-called deep drawn pieces
09/07/1994EP0613740A1 Process and hydraulic press for the pressing of sheets
08/1994
08/31/1994EP0612992A2 Method of diagnosing pressing machine based on detected physical value as compared with reference
08/30/1994CA2006867C Drawing machine
08/23/1994US5339665 Die-cushion apparatus of press machine
08/18/1994DE4304329A1 Thermoforming press
07/1994
07/06/1994CN1025297C Method and device for pressing sheet material with deformable punch under ram
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