Welding apparatus and welding process of diamond-based and sintered cubic boron nitride cutting tools and wear-resistant tools using instantaneous heating and cooling methods

摘要

The diamond-based cutting tool is made of a hard carbon (WC-Co) or a tool steel such as polycrystalline diamond (PCD), natural diamond, chemical vapor deposition (CVD), and polycrystalline cubic boron nitride (PCBN) It is used in the form of being joined to a shank by welding. At this time, the welded portion plays an important role in taking charge of the cutting load. The conventional welding method uses a torch or an induction heating method by hand, which has problems such as a decrease in joint strength due to oxidation of a weld portion and a decrease in productivity due to manual operation. In order to solve such a problem, the present invention adopts an instant heating system so that it can be heated and cooled to a welding temperature within a very short period of a few seconds at a few seconds, and only the tool material and the welding material are heated without increasing the temperature of the shank material, The design and equipment of a new concept instantaneous atmosphere control welding equipment, and the welding process using this equipment. The present invention can process dozens to hundreds of insert tools at a time in less than one hour, which is very economical and automatable compared to conventional methods, An inert gas or the like can be freely used, and thus the performance of the welded portion can be maximized.