JPH01129011U

JPH01129011U -

Info

Publication number: JPH01129011U
Application number: JP2381088U
Authority: JP
Priority date: 1988-02-26
Filing date: 1988-02-26
Publication date: 1989-09-04

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の側面図、第２図は
同正面図、第３図は第１図Ａ―Ａ断面図、第４〜
第６図は本考案の加工状態説明図、第７図は従来
の標準ドリル、第８図は従来のロウソク型ドリル
の側面図、第９図は従来工具の加工後の被加工部
品の形状を示す図、第１０図は従来のものの加工
状態説明図、第１１図は本考案の詳細側面図、第
１２図は同正面図、第１３図は本考案の別の実施
例の側面図、第１４図は同事例での加工状態の説
明図である。１……工具本体、２……工具先端Ｗ形状部、３
……溝部、４……先端角部、５……テーパー部、
６……切屑、７……工具肩部、８，９……ドリル
先端中央部、１０，１３……ドリル肩部。 Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a front view of the same, Fig. 3 is a sectional view taken along line AA in Fig. 1, and Fig. 4 -
Fig. 6 is an explanatory diagram of the machining state of the present invention, Fig. 7 is a conventional standard drill, Fig. 8 is a side view of a conventional candle-shaped drill, and Fig. 9 shows the shape of the workpiece after machining with the conventional tool. 10 is an explanatory diagram of the processing state of the conventional one, FIG. 11 is a detailed side view of the present invention, FIG. 12 is a front view of the same, and FIG. 13 is a side view of another embodiment of the present invention. FIG. 14 is an explanatory diagram of the machining state in the same case. 1... Tool body, 2... Tool tip W-shaped part, 3
...Groove part, 4...Tip corner part, 5...Tapered part,
6... Chips, 7... Tool shoulder, 8, 9... Central part of drill tip, 10, 13... Drill shoulder.

Claims

[Scope of utility model registration request]

The tip of the tool body is composed of two tip corners and a W-shaped taper section at an appropriate angle following the tip corners, and a cutting edge is attached to each of the tip corners and the W-shaped taper section, and a cutting edge is provided for accumulating chips. A tool for drilling thin-walled materials, characterized in that a plurality of grooves are formed facing the rear of the cutting blade.