JPS5942813U

JPS5942813U - Drill

Info

Publication number: JPS5942813U
Application number: JP13801182U
Authority: JP
Inventors: 森中　明善
Original assignee: 三菱電機株式会社
Priority date: 1982-09-09
Filing date: 1982-09-09
Publication date: 1984-03-21

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

、　　　第１図は従来の加工具を用いて形成された印刷
１　　配線板の上面図、第２図はこの考案の一実施例を
１　　示すドリルの構成を示す側面図と底面図、第３図
：　　は第２図のドリルを用いて加工された印刷配線板
の上面図である。、　　　図に於て、１は被加工部材、８はドリル、９は
□　　底面、１０は針部、１１′は溝部、１２は切削刃
である。尚各図中、同一符号は同一または相当部分を示
すものとする。, Fig. 1 is a top view of a printed wiring board formed using a conventional processing tool, Fig. 2 is an embodiment of this invention, Fig. 1 is a side view and bottom view showing the construction of a drill, and Fig. 3 is a top view of a printed wiring board formed using a conventional processing tool. : is a top view of a printed wiring board processed using the drill of FIG. 2. In the figure, 1 is a workpiece, 8 is a drill, 9 is a bottom surface, 10 is a needle portion, 11' is a groove portion, and 12 is a cutting blade. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A cylindrical cutting tool made of steel, which cuts the workpiece by pressing the bottom surface against the workpiece and rotating the tool. a needle that protrudes like a needle; a groove that is annularly recessed inward from the bottom surface on the outer periphery of the needle; and a groove that is formed in a part of the bottom surface and extends radially outward from the outside of the groove. A drill equipped with a cutting blade that cuts the surface of the workpiece into an annular shape.