Patents for B21D 24 - Special deep-drawing arrangements in, or in connection with, presses (1,969)
08/1999
08/24/1999CA2143695C Press having gas cylinders or plastically deformable members for even distribution of blank-holding force on pressure member through cushion pins
08/19/1999DE19806079A1 Extrusion press with variable direction of extrusion for deforming flat sheets into workpieces
08/19/1999DE19805706A1 Tool for deep drawing of sheet components
08/12/1999WO1999040359A1 Self-lubricating fluid cylinder
07/1999
07/27/1999CA2109137C Spring device
07/22/1999DE19801203A1 Hole-making device for flowing drawn components, particularly sheets
07/14/1999CN2328450Y 空气油压缓冲器 Air hydraulic buffer
07/13/1999CA2038958C Blank forming method and apparatus and product obtained thereby
07/01/1999DE19757376A1 Sheet holding system for a deep-drawing moulding press
06/1999
06/24/1999DE19756911A1 Sheet plate drawing assembly
06/10/1999DE19855322A1 Apparatus for assisting in the stripping of can bodies from the punch of a can body maker
06/09/1999EP0920359A1 Valve and method for producing a valve seat for a valve
06/08/1999CA2181931C Drawing method and apparatus
06/01/1999US5908797 High strength, hardness
06/01/1999CA2044251C Can body making apparatus
05/1999
05/19/1999EP0916427A1 Progressive deep-drawing machine
05/11/1999US5901599 Method and apparatus for sheet forming a blank using a variable bead
04/1999
04/08/1999DE19743921A1 Drawing appliance for sinks, barrels, etc
02/1999
02/18/1999DE19734277A1 Device for deep-drawing metal plate
01/1999
01/27/1999EP0893171A1 Methods for constructing a die for press bending machine and determining cushion forces therefore
01/07/1999WO1999000201A1 Valve and method for producing a valve seat for a valve
01/07/1999DE19726991A1 Ventil und Verfahren zur Herstellung eines Ventilsitzes für ein Ventil Valve and method of producing a valve seat for a valve
12/1998
12/30/1998EP0887127A1 Drawing device in a press
12/17/1998DE19724766A1 Method and apparatus for hydromechanical deep drawing
11/1998
11/05/1998DE19718212A1 Tool for drawing sheet metal blanks
11/03/1998US5829137 Method for manufacturing wheels
09/1998
09/29/1998US5813275 Safety circuit for press die cushion
09/23/1998EP0865844A2 Drawing apparatus for a press
09/23/1998EP0865843A1 Drawing device for a drawing press
09/22/1998CA2077595C Hydraulic cushioning system for press, having hydraulic power supply including means for adjusting initial pressure to be applied to pressure-pin cylinders
09/11/1998WO1998039116A1 Progressive deep-drawing machine
09/08/1998US5802907 Tooling apparatus and method for high speed production of drawn metal cup-like articles
08/1998
08/25/1998US5797291 Die set for manufacturing heat exchanging fin of heat exchanger
08/18/1998US5794482 Apparatus in a hydraulic press
08/05/1998EP0821625A4 Improved rotary cup infeed
07/1998
07/30/1998DE19702636A1 Tool for deep drawing sheet metal parts
07/22/1998EP0737278B1 Liquid spring for punch press
07/15/1998EP0852523A1 Improvement to the blank holder force regulating system in a press
07/08/1998CN1187153A Improved rotary cup infeed
07/02/1998DE4345340C2 Hydraulic press with shortened work time
06/1998
06/30/1998CA2164999C Stretch controlled forming mechanism and method for forming metal blanks
06/09/1998US5761949 Deep-drawn stamping process including side piercing
05/1998
05/28/1998DE19645627A1 Hydraulic press with reduced ram return times
05/20/1998DE19646122A1 Hold-down for segmental control of material flow in deep drawing, and method of controlling hold-down force
05/05/1998US5746084 Drawing mechanism for a press
04/1998
04/30/1998DE19712664A1 Deep drawing press
04/23/1998DE19643483A1 Hydraulic system for tools or presses for sheet-metal work
04/15/1998EP0835701A2 Die for clinch joints
04/15/1998EP0835699A2 Hydraulic deep drawing apparatus
04/15/1998CN1178729A Hydraulic deep-drawing device
04/14/1998CA2094827C Die-cushion apparatus of press machine
04/07/1998US5735201 Apparatus including mutually communicating hydraulic cylinders for even distribution of blank-holding force on pressing machine
04/02/1998DE19639222A1 Cushion pre-acceleration device for sheet metal working in press
03/1998
03/26/1998DE19639220A1 Sheet metal holder pre-accelerator for single action press
03/12/1998WO1998009749A1 Method of fabricating shaft from metal plate
03/10/1998US5724843 Method of diagnosing pressing machine based on detected physical value as compared with reference
02/1998
02/25/1998EP0804302A4 Improved lightweight ram for bodymaker
02/18/1998EP0586669B1 Press with a hydraulic drive, in particular a sheet-shaping press
02/04/1998EP0821625A1 Improved rotary cup infeed
12/1997
12/30/1997US5701778 Press having gas cylinders of plastically deformable members for even distribution of blank-holding force on pressure member through cushion pins
12/30/1997US5701777 Drawing method and apparatus
12/11/1997WO1997046337A1 Improvement to the blank holder force regulating system in a press
12/09/1997CA2093382C Apparatus for measuring blank holding force acting on pressure ring of apress
12/03/1997CN2269250Y Top impact rotary composite multistation punch head
12/02/1997US5692404 Method of diagnosing pressing machine based on detected physical value as compared with reference
11/1997
11/26/1997EP0808224A1 Deep-drawing tool with integral holding-down device
11/26/1997EP0777540A4 Wiping unit for ram of bodymaker
11/18/1997US5687605 Wiping unit for ram of bodymaker
11/18/1997US5687598 Press having cushioning cylinders each having two chambers whose pressure difference is adjustable to control blank-holding force
11/13/1997DE19718841A1 Material flow control for bending sheet metal workpiece
11/12/1997EP0806256A2 Method for controlling the material flow during the drawing of sheet metal parts and device for carrying out the method
11/12/1997CN1164447A Die set for manufacturing heat exchanging fin of heat exchanger
11/05/1997EP0804302A1 Improved lightweight ram for bodymaker
11/04/1997CA2070100C Apparatus and method for hydroforming sheet metal
10/1997
10/30/1997DE4345341C2 Hydraulic press with shortened work time
10/30/1997DE4345339C2 Hydraulic press with shortened work time
10/21/1997US5678439 Spacer
09/1997
09/24/1997CN1160367A Wiping unit for ram of bodymaker
08/1997
08/26/1997US5660074 Method of selecting a preload oil pressure valve for a die cushion pin pressure equalizing system of a press machine
06/1997
06/17/1997US5639147 Variable off-set full face wheel and method and apparatus for making the same
06/17/1997US5638717 For use on a high speed mechanical press
06/11/1997EP0777540A1 Wiping unit for ram of bodymaker
05/1997
05/15/1997DE19541721A1 Hydraulic drawing unit in press
05/14/1997EP0773076A1 Apparatus for controlling the pressure in hydraulic cushion devices of presses
05/14/1997EP0773075A2 Method and device for controlling, checking or optimizing pressure of cushion pin cylinders of press by discharging fluid or initial pressure
05/06/1997US5626046 Lightweight ram for bodymaker
04/1997
04/29/1997US5623848 Pressing method and system wherein cushion platen is lowered by cooperation of shock absorbers and cylinders before holding of blank between die and pressure ring
04/29/1997US5623847 Method of and apparatus for deep drawing
04/16/1997EP0768127A2 Drawing apparatus for a press
03/1997
03/19/1997CN1145285A Drawing method and apparatus
03/13/1997DE19532963A1 Control of holding-down pressure and for lubricating when deep drawing
03/04/1997CA2006774C Device for pressing sheet material
02/1997
02/26/1997CN1143921A Improved lightweight ram for bodymaker
02/04/1997US5599565 Device for press forming a sheet blank
01/1997
01/29/1997EP0755733A1 Drawing method and apparatus
01/29/1997CN1141219A Method and apparatus for sheet forming blank using variable bead
01/28/1997CA2077510C 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
01/23/1997DE19629074A1 High strength and hardness sintered silicon nitride-based material
01/22/1997EP0754508A1 Method and apparatus for forming a blank using a variable bead
12/1996
12/19/1996DE19521525A1 Clamp arrangement for sheet metal workpieces
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