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Method of producing hard metal cutting tool and cutting tool produced thereby

A cutting tool and cemented carbide technology, which is used in the manufacture of cemented carbide cutting tools and the field of cutting tools, can solve problems such as cracks in the tool, and achieve the effect of easy re-grinding and precise machining.

Inactive Publication Date: 2016-08-10
南廷雨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the case of a cutting tool in which both the shank and the cutting portion are formed of cemented carbide, no problem occurs in the above coating process; whereas in the case of a cutting tool in which only the cutting portion is formed of cemented carbide, Since the shank and the cutting portion have different coefficients of thermal expansion from each other, cracks may appear at the surface of the tool after the heat treatment applied in the coating process

Method used

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  • Method of producing hard metal cutting tool and cutting tool produced thereby
  • Method of producing hard metal cutting tool and cutting tool produced thereby
  • Method of producing hard metal cutting tool and cutting tool produced thereby

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Embodiment Construction

[0031] Hereinafter, a method of manufacturing a cemented carbide cutting tool according to an exemplary embodiment of the present invention will be described with reference to the drawings.

[0032] refer to figure 1 , 2a and 2b, the manufacturing method according to the present invention includes: a step S100 of joining the main body portion 10 and the cutting portion 20 by heat treatment; a step S200 of cooling the joined main body portion 10 and the cutting portion 20; The step S300 of processing; the step S400 of coating the surface of the cutting tool with a film; and the step 500 of cooling the coated cutting tool.

[0033] First, in the step S100 of joining the main body portion 10 and the cutting portion 20 by heat treatment, the joint portion of the main body portion formed of hot work tool steel such as SKD61 is joined by brazing or welding at a temperature of 800 to 1200° C. Joint to the cutting part formed of cemented carbide. In this bonding step, it is prefera...

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Abstract

The present invention relates to a method for producing a hard metal cutting tool and a cutting tool produced thereby, the method comprising the steps of: a) heat-treating and bonding a body portion which is made of hot tool steel and a cutting portion which is made of a hard metal; b) cooling the bonded body portion and cutting portion for a predetermined time period; c) forming a cutting tool by cutting the cutting portion in a pattern defined according to use; d) coating the cut surface of the cutting tool with a coating film made of at least one of a metal oxide, a nitride and a carbide in order to improve mechanical properties; and e) cooling the coated cutting tool in the air for a predetermined time period, because cracks do not occur after the coating process, a hard metal cutting tool with excellent mechanical properties can be produced.

Description

technical field [0001] The present invention relates to a method of manufacturing a cutting tool in which only a cutting portion is formed of cemented carbide, and more particularly, to a method of manufacturing a cemented carbide cutting tool having excellent mechanical properties and a cutting tool manufactured by the method, wherein even Cracks are also not generated in the cemented carbide cutting tool after the high-temperature coating treatment. Background technique [0002] Cutting tools such as end mills used in milling machines, drills for punching holes, and hot and cold stamping machines include a cutting portion at a front end thereof and a shank integrally formed with the cutting portion. The cutting tool should have excellent mechanical properties such as durability, wear resistance and machinability, and thus is usually made of hard metal. [0003] However, since cemented carbide used as a tool material is very expensive, cutting tools in which only the cutti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/28C23C14/06C23C16/34
CPCB23P15/28C23C14/06C23C16/34
Inventor 南廷雨
Owner 南廷雨