JPS63186512U

JPS63186512U -

Info

Publication number: JPS63186512U
Application number: JP7775087U
Authority: JP
Priority date: 1987-05-22
Filing date: 1987-05-22
Publication date: 1988-11-30

Description

[Brief explanation of drawings]

第１図は本考案によるセンタピンにより芯出し
を行つている要部縦断側面図である。第２図は穿
孔直後の要部縦断側面図である。第３図は従来の
磁気ボール盤による穿孔直後を示す要部縦断側面
図である。図において、１はスピンドル、２はセンタピン
ガイド、３はスプリング、４はセンタピン、４ａ
はセンタピンボデイ、４ｂはジヨイント、４ｃは
スプリングＡ、４ｄはピン、４ｅは止メネジ、４
ｂａはエツジ部、５は回転刃物、６は鋼板、７は
切削コアである。 FIG. 1 is a longitudinal cross-sectional side view of the main part of the device in which centering is performed using the center pin according to the present invention. FIG. 2 is a longitudinal sectional side view of the main part immediately after drilling. FIG. 3 is a longitudinal sectional side view of the main part immediately after drilling by a conventional magnetic drilling machine. In the figure, 1 is a spindle, 2 is a center pin guide, 3 is a spring, 4 is a center pin, 4a
is the center pin body, 4b is the joint, 4c is the spring A, 4d is the pin, 4e is the set screw, 4
ba is an edge portion, 5 is a rotating blade, 6 is a steel plate, and 7 is a cutting core.

Claims

[Claims for Utility Model Registration] An electromagnet, a stand attached to the electromagnet, an electric drill attached to the stand so as to be movable up and down, a rotary cutter attached to the rotating shaft of the electric drill, and the rotating shaft A magnetic drilling machine consisting of a center pin for centering that is mounted inside the center so as to be movable up and down via a spring, and a joint with an edge-shaped lower outer circumference at the tip of the center pin; A cutting core ejection device for a magnetic drilling machine that is equipped with a pin that can be moved up and down.