Production method of the throw away type drill holder, having the coolant hole which is penetrated from the throw away type drill holder and the throw away type drill which uses that

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a throw-away drill holder with high working efficiency and energy efficiency by efficiently forming a spiral blind hole which is a step in the middle of forming a coolant hole.;SOLUTION: This is the manufacturing method of the throw-away drill holder with the coolant hole passed from the front end to the rear end. It comprises a step of preparing a material for a main body section with a through-hole partially formed of a spiral hole, a step of preparing a solid material for a cutting section, a step of obtaining a material for the drill holder by friction pressure bonding of the material for the cutting section to the front end of the material for the main body section, a step of obtaining a blank for the drill holder by lathe machining of the outer shape of the material for the drill holder, a step of forming at least one chip discharging groove in the main body section of the blank for the drill holder, and a step of completing the coolant hole by forming at least one insert attachment seat in the cutting section of the blank for the drill holder and forming a linear hole communicated with the through-hole.;COPYRIGHT: (C)2008,JPO&INPIT