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US20090205396 EXPLOSION FORMING SYSTEM  
An explosion forming apparatus (10) that preferably utilizes a shock wave (42) directed along a work piece (12) to progressively conform the work piece to a contour die cavity (44).
US20070186617 Electromagnetic blank restrainer  
Apparatus for forming an article from a blank of sheet metal including electromagnet field producing means disposed adjacent a die cavity for selectively energizing the field producing means for...
US20100175449 IGNITION DEVICE FOR EXPLOSIVE FORMING  
Through the invention, an ignition device for explosive forming of work pieces in a forming die, which has an ignition mechanism and an ignition tube, and in which the ignition tube guides the...
US20110308294 Punch Press Oscillating Tool Insert  
In certain aspects of the invention, punching machines and tools for punching machines are provided that include mechanical devices driven by a driving device of the punching machines and are used...
US20110072877 MARKING APPARATUS USING MAGNETISM  
Provided is an apparatus for marking a metal using magnetism. The apparatus includes an upper body having an elastic unit insertion groove in which an elastic unit is inserted, an operation body...
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