Trimming die and punch thereof

Abstract

A trimming die includes a first die base assembly, a second die base assembly, and a trimming punch. The first die base assembly includes a fixing portion; the second die base assembly is positioned opposite the first die base assembly; the second die base assembly includes a die cavity portion; the die cavity portion has a die cavity and a die cavity inner wall; the die cavity inner wall has a plurality of first slant grooves; the punch has a fixing end portion and a trimming end portion positioned opposite the fixing end portion; the fixing end portion is disposed at the fixing portion; the trimming end portion is positioned corresponding to the die cavity; a peripheral surface of the trimming end portion includes a plurality of second slant grooves. A trimming punch is also provided.

What is claimed is: 
     
         1 . A trimming die, comprising:
 a first die base assembly, comprising a fixing portion;   a second die base assembly, positioned opposite the first die base assembly, wherein the second die base assembly comprises a die cavity portion; the die cavity portion has a die cavity and a die cavity inner wall; the die cavity inner wall has a plurality of first slant grooves; and   a trimming punch, having a fixing end portion and a trimming end portion positioned opposite the fixing end portion, wherein the fixing end portion is disposed at the fixing portion; the trimming end portion is positioned corresponding to the die cavity; and a peripheral surface of the trimming end portion comprises a plurality of second slant grooves.   
     
     
         2 . The trimming die according to  claim 1 , wherein the first die base assembly further comprises a bolt element and a blank holder positioned corresponding to the die cavity portion; an end of the bolt element is disposed at the fixing portion, and another end of the bolt element is disposed at the blank holder. 
     
     
         3 . The trimming die according to  claim 2 , wherein the first die base assembly and the second die base assembly further comprise a guide pillar therebetween; the first die base assembly further comprises a guide pillar lining corresponding to the guide pillar. 
     
     
         4 . The trimming die according to  claim 2 , wherein the fixing portion further comprises a punch back plate, a punch fixing plate, and a fixing element that joins the punch back plate and the punch fixing plate; the fixing end portion of the trimming punch leans against the punch back plate and is positioned at the punch fixing plate. 
     
     
         5 . The trimming die according to  claim 2 , wherein the die cavity portion is formed of a die block and a die set. 
     
     
         6 . The trimming die according to  claim 1 , wherein the first slant grooves are arranged at intervals. 
     
     
         7 . The trimming die according to  claim 1 , wherein the first slant grooves are in the shape of a column-shaped recess, a V-shaped recess or an arc-shaped recess. 
     
     
         8 . The trimming die according to  claim 1 , wherein the second slant grooves are arranged at intervals. 
     
     
         9 . The trimming die according to  claim 1 , wherein the second slant grooves have the same length. 
     
     
         10 . The trimming die according to  claim 1 , wherein the second slant grooves are in the shape of a column-shaped recess, a V-shaped recess or an arc-shaped recess. 
     
     
         11 . A trimming punch, comprising a trimming end portion, wherein a peripheral surface of the trimming end portion comprises a plurality of slant grooves. 
     
     
         12 . The trimming punch according to  claim 11 , wherein the slant grooves are arranged at intervals. 
     
     
         13 . The trimming punch according to  claim 11 , wherein the slant grooves have the same length. 
     
     
         14 . The trimming punch according to  claim 11 , wherein the slant grooves are in the shape of a column-shaped recess, a V-shaped recess or an arc-shaped recess.