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Application filed by King Hawk Co LtdfiledCriticalKing Hawk Co Ltd
Priority to TW094118232ApriorityCriticalpatent/TW200642777A/en
Publication of TW200642777ApublicationCriticalpatent/TW200642777A/en
This invention provides a fabrication method for positioning pin of wrench, including the following steps, 1. Preparation of the material: using a whole roll of wire material and straightening the wire material and cutting it into desired lengths as fabrication model; 2. Progressive forge: progressively forging the model with progressive die to form pin body; 3. Roll-forming grooves on the pin: using cold-roll forming method to form circular grooves on the pin body; 4. Installation spring: installing a cone-shaped spring on the pin by fitting the small diameter end of the spring into the circular groove on the pin. By this method, the procedure is simplified, and the pin will have superior strength.
TW094118232A2005-06-022005-06-02The fabrication method for pins of wrench
TW200642777A
(en)