| 摘要 |
The present invention provides a press mold for processing a rim of a brake shoe which facilitates a work for forming a through hole by punching a flat rim material, and a work for assigning a curvature, and a method for manufacturing a brake shoe using the same. According to the present invention, the method for manufacturing a brake shoe comprises: a first step for forming multiple dent parts which are embossing processed in fixed intervals in the length direction by pressing a flat rim material; a second step for forming a through hole by punching an inside of the dent part by using an upper mold for punching and bending where an arch side having a curvature set in the lower side is formed, and which has a protrusion for punching which is protruding from the center of the arch side to the lower side, and a lower mold for punching and bending where a circumference side including the upper side is formed to correspond to a curvature which is the same as the curvature of the arch side after a dent part processing groove is formed in the upper side to perform a punching process by descending the protrusion for punching while the dent part is mounted on, and for forming the entire rim material as a rim having the predetermined curvature since a punching process and a bending process are performed in each dent part to form a curvature corresponding to the arch side at the fixed length of the rim material including the through hole; and a third step for fixing the rim and the web by pressing a combining protrusion protruding from the through hole while the rim and the web are combined by inserting the combining protrusion into the through hole after preparing the web having the combining protrusion corresponding to each through hole of the rim. |
