JPS5859513U

JPS5859513U - drilling tool

Info

Publication number: JPS5859513U
Application number: JP15361781U
Authority: JP
Inventors: 国森　永年
Original assignee: 住友電気工業株式会社
Priority date: 1981-10-15
Filing date: 1981-10-15
Publication date: 1983-04-22

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、この考案の孔明は工具を示す側面図、第２図
は同上の正面図、第３図は第１図に示す工具を９０′回
転した側面図、第４図は第１図ｘ−Ｘ線に沿った断面図
、第５図はチップの斜視図、第６図はチップの変形を示
す断面図、第７図は他の実施例の側面図、第８図は同上
の正面図である。１・・・工具本体、２・・・ねじれ溝、３・・・座面、
４゜４′・・・チップ、５・・・切刃、６・・・切刃始
端部、７・・・平取部、８・・・前にげ面、９・・・凹
所、１０．１０′・・・後部側面、１４・・・クランプ
手段、１５・・・凸部、１６・・・アリ溝。Fig. 1 is a side view showing the tool of this invention, Fig. 2 is a front view of the same as above, Fig. 3 is a side view of the tool shown in Fig. 1 rotated 90', and Fig. 4 is a side view of the tool shown in Fig. 1. 5 is a perspective view of the chip, 6 is a sectional view showing deformation of the chip, 7 is a side view of another embodiment, and 8 is a front view of the same as above. It is a diagram. 1... Tool body, 2... Twisted groove, 3... Seat surface,
4゜4'... Chip, 5... Cutting edge, 6... Cutting edge starting end, 7... Flat part, 8... Bent surface, 9... Recess, 10. 10'... Rear side surface, 14... Clamping means, 15... Convex portion, 16... Dovetail groove.

Claims

[Claims for Utility Model Registration] (1) At the tip of the tool body, a pair of chips are arranged with the starting end of each cutting edge located near the center of rotation, and in a point-symmetrical state or close to each other. The insert has several steps of flattened parts in the axial direction that are convex in the direction of rotation on the rake face near the center of rotation, and the line of intersection with the front flank is the center edge.
Furthermore, an axial recess is provided in the center of the rake face to form a central cutting edge that connects the central cutting edge and the outer peripheral cutting edge,
The radial rake angle of the outer cutting edge is close to a positive angle, and the axial rake angle is also a positive angle close to the helix angle of the helical groove of the tool body, and is removably attached to the tool body via a clamping means. Confucius is a tool. (2) Each of the tips has a rear end facing the axis of the tool.
Utility model registration claim No. 1, characterized in that the tool body is formed to form an acute angle or an obtuse angle close to a right angle, and a total of three surfaces, the side surface near the center of rotation, the rear side surface, and the bottom surface, are in close contact with the tool body. ) is a tool. (3) The rear side surface of each of the tips is inclined in the direction of biting into the tool body, while the joint surface of the tool body is a corresponding dovetail groove for tapered fitting of the two. Komei stated in claim (2) of patent registration is a tool. (4) Each of the chips has a convex portion that serves as a chip breaker on the rear part of the rake face. is a tool. --- (5) The clamping means for the chip is a countersunk screw, the head of which is housed in a tapered recess of a mounting hole provided in the chip. The komei described in any one of items 1) to (4) is a tool. (6) The arrangement positions of the pair of tips are stepped in the radial and axial directions, so that the center of the hole to be machined is cut with one tip, and the outer periphery of the hole is cut with the other tip. A tool according to any one of claims (1) to (5) for utility model registration, characterized in that: