JPH01101708U

JPH01101708U -

Info

Publication number: JPH01101708U
Application number: JP20123187U
Authority: JP
Priority date: 1987-12-28
Filing date: 1987-12-28
Publication date: 1989-07-10

Description

[Brief explanation of the drawing]

第１図は本案工具の１例の縦断面図、第２図は
第１図の―線横断面図である。１……スピンドル、２……工具ホルダ、３……
凹溝、４……切刃チツプ、５……カートリツジ、
１２……ピストン、１２ａ……ピストンロツド、
１２ｂ……テーパ部、１３……戻しばね、１４…
…単動シリンダ、１５……押圧子。 FIG. 1 is a longitudinal cross-sectional view of one example of the proposed tool, and FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1...Spindle, 2...Tool holder, 3...
Concave groove, 4... Cutting blade tip, 5... Cartridge,
12... Piston, 12a... Piston rod,
12b... Taper portion, 13... Return spring, 14...
...Single acting cylinder, 15...Press element.

Claims

[Scope of utility model registration request]

In a drilling tool comprising a cartridge with a cutting tip fixed to a tool holder connected to the front end of a spindle, a longitudinal groove is formed in the front-rear direction on the outer peripheral surface of the front end of the tool holder, and the front end is inserted into the groove. Insert a long cartridge in the front-rear direction with a cutting tip fixed to the tip, fix the cartridge to a tool holder at its rear end, and insert the cartridge into the tool holder from the spindle side when the tool retreats after drilling. A single-acting cylinder is formed that advances an internal piston against a return spring by the supplied fluid, and a piston rod extending forward from the piston is swingably inserted into the tool holder and attached to the front end of the piston rod. A tapered portion having a large diameter is formed toward the front, and the tool holder is pushed by the tapered portion as the piston rod retreats and slides radially outward, thereby causing the front end portion of the cartridge to move radially outward. A drilling tool characterized by being provided with a presser that presses the hole.