Shredding cutter and machining method thereof

Abstract

A machining method of a shredding cutter includes steps of (a) assembling blades on a cutter shaft to be machined, and pre-locating the blades on the cutter shaft by a clamp; (b) rolling or extruding the cutter shaft at positions between the blades by a rolling cutter, so that the cutter shaft between the adjacent blades is formed with embossed parts on two flanks of each of the blades; and (c) withdrawing the rolling cutter, and each of the blades being fixed on the cutter shaft by the embossed parts on the two flanks thereof. A shredding cutter machined by the machining method mentioned above includes a cutter shaft and a plurality of blades, the blades are arranged on the cutter shaft with a predetermined spacing, embossed parts are formed on the cutter shaft between the adjacent blades, and the blades are fixed between the embossed parts. The present invention has a strong unitary structure, high precision, high yield, which is beneficial to reduce the processing cost and the cost of materials.

1 . A machining method of a shredding cutter, comprising steps of:
 (a) assembling blades on a cutter shaft to be machined, and pre-locating the blades on the cutter shaft by a clamp;   (b) rolling or extruding the cutter shaft at positions between the blades by a rolling cutter, so that the cutter shaft between the adjacent blades is formed with embossed parts on two flanks of each of the blades; and   (c) withdrawing the rolling cutter, and each of the blades being fixed on the cutter shaft by the embossed parts on the two flanks thereof.   
     
     
         2 . The machining method of a shredding cutter of  claim 1 , wherein the rolling cutter comprises a hob shelf, hobs, gaskets and spring retainers, the hobs are arranged on the hob shelf and spaced by the gaskets, and the hobs are fixed on the hob shelf by the spring retainers retaining the hobs at opposite ends. 
     
     
         3 . The machining method of a shredding cutter of  claim 2 , wherein spacing between the adjacent hobs on the hob shelf is larger than or equal to the thickness of the blade of the shredding cutter to be machined. 
     
     
         4 . The machining method of a shredding cutter of  claim 1 , wherein at least one groove is formed on the cutter shaft between the adjacent blades in the step (b). 
     
     
         5 . A shredding cutter machined by the machining method of  claim 1 , comprising:
 a cutter shaft; and   a plurality of blades;   wherein the blades are arranged on the cutter shaft with a predetermined spacing, embossed parts are formed on the cutter shaft between the adjacent blades, and the blades are fixed between the embossed parts.   
     
     
         6 . The shredding cutter of  claim 5 , wherein the embossed parts on the cutter shaft are formed by rolling or extruding by a rolling cutter. 
     
     
         7 . The shredding cutter of  claim 6 , wherein the rolling cutter comprises a hob shelf, hobs, gaskets and spring retainers, the hobs are arranged on the hob shelf and spaced by the gaskets, and the hobs are fixed on the hob shelf by the spring retainers retaining the hobs at opposite ends. 
     
     
         8 . The shredding cutter of  claim 7 , wherein spacing between the adjacent hobs on the hob shelf is larger than or equal to the thickness of the blade of the shredding cutter to be machined. 
     
     
         9 . The shredding cutter of  claim 5 , wherein the cutter shaft is a solid polyhedron or a cylindrical cutter shaft having grooves on the surface thereof. 
     
     
         10 . The shredding cutter of  claim 5 , wherein at least one groove is formed on the cutter shaft between the adjacent blades.