Patent ID: 9636736
Date: 2017-05-02
CPC Classifications: B21D

Claim:
1. A method for explosive forming of a work piece ( 12 ) having an interior by means of a gas explosion, comprising: arranging the work piece ( 12 ), including a work piece holding area ( 21 ), in an intake area ( 15 ) of a moulding tool ( 2 ); at least partially filling a work piece cavity ( 13 ), whose wall has a closed shape in cross-section, with liquid ( 26 ), providing in an ignition tube ( 8 ) an explosive gas mixture ( 23 ) in direct fluid communication with a surface of the liquid ( 22 ) prior to ignition, wherein the ignition tube ( 8 ) and the work piece ( 12 ) together form a sealed path having a substantially constant cross-section; and wherein the ignition tube ( 8 ) is brought into abutment with the work piece holding area ( 21 ) prior to triggering the explosion, triggering the explosion by igniting the explosive gas mixture ( 23 ) in the ignition tube ( 8 ) in order to form a detonation front propagating through the ignition tube and into the interior of the work piece ( 12 ).