paper punching tool

Abstract

The invention relates to a paper punching tool, comprising a handle, a knife rod and a cutter head, the handle, the cutter rod and the cutter head are welded, and the cutter head is composed of the following components: 80-92wt% carbonized Tungsten, 5.6-14wt% nickel and 2.4-6wt% iron, the knife rod and the knife head are connected by soldering and fixed by spot welding. The present invention greatly enhances the compatibility between the hard alloy cutter head and the stainless steel cutter rod by optimizing the components of the carbide cutter head, so that the connection between the cutter head and the cutter rod can be welded by soldering at a relatively low temperature Complete, so that the stainless steel tool holder is not easy to anneal and maintain its own high strength.

Description

(1) Technical field [0001] The invention relates to a paper punching tool. (2) Background technology [0002] The paper punching cutter used in the traditional paper punching machine has a cutter body composed of a handle and a cutter head and a cylindrical through hole arranged at the center of the cutter body; The paper scraps punched out by the cutter head are discharged outward through the through hole in the center. Since it is a round paper punching knife made entirely of tool steel, the following problems arise during use: it is more difficult to process and manufacture, and the heat treatment is also difficult to control, so the following problems are likely to occur during use Disadvantages: 1) Its knife head is easy to blunt, and the knife edge will crack or even break when it encounters foreign objects; 2) If it does not punch for a long time, the paper scraps left in the knife hole will also cause The through hole of the cutter body is rusted, which will bring ...

AI Technical Summary

Problems solved by technology

Since it is a round paper punching knife made entirely of tool steel, the following problems arise during use: it is more difficult to process and manufacture, and the heat treatment is also difficult to control, so the following problems are likely to occur during use Disadvantages: 1) Its knife head is easy to blunt, and the knife edge will crack or even break when it encounters foreign objects; 2) If it does not punch for a long time, the paper scraps left in the knife hole will also cause The through hole of the cutter body is rusted, which will bring troubles of paper scraps being difficult to discharge in the future punching; 3) When the paper puncher is working continuously, the annealing is caused by the heat of the cutter head, and the edge of the cutter is worn out, and the hole cannot be punched ; 4) During long-term continuous punching, the chip removal channel cannot be smooth and easily blocked

[0004] 1. The cutter head components used are traditional tungsten carbide + cobalt, and high-temperature welding must be used when welding with the seamless stainless steel tube of the cutter bar. The welding temperature is above 700 ° C, resulting in the stainless steel tube at the weld Annealing, the strength is greatly reduced, and the service life of the paper punching tool is greatly shortened;

[0005] 2. Welding is also used between the knife handle and the knife rod, which is costly