JPS6444102U

JPS6444102U -

Info

Publication number: JPS6444102U
Application number: JP13962387U
Authority: JP
Priority date: 1987-09-11
Filing date: 1987-09-11
Publication date: 1989-03-16
Anticipated expiration: 2002-09-11
Also published as: JPH0524490Y2

Description

[Brief explanation of the drawing]

第１図は本考案のボーリング錐の実施例第１の
側面図、第２図はその端面図、第３図は第１図に
対して９０°ずらした先端部側面図、第４図は実
施例第２の側面図、第５図はその端面図、第６図
は第４図に対して９０°ずらした先端部側面図、
第７図は実施例第３の側面図、第８図はその端面
図、第９図は第７図に対して９０°ずらした先端
部側面図、第１０図は研磨状態を示す図、第１１
図は従来のボーリング錐の側面図、第１２図はそ
の端面図、第１３図は第１１図に対して９０°ず
らした先端部側面図である。１……シヤンク部、２……ボデイ部、４，２２
……切粉排出溝、５，２１……超硬チツプ、６…
…中心錐、７……底切り刃、８……逃げ面、９，
２３……すくい面、１０……稜線、１１……△状
凸起部、１２……毛引刃。 Figure 1 is a side view of the first embodiment of the boring drill of the present invention, Figure 2 is its end view, Figure 3 is a side view of the tip shifted by 90 degrees from Figure 1, and Figure 4 is the actual implementation. Example 2 is a side view, FIG. 5 is an end view thereof, and FIG. 6 is a side view of the tip section shifted by 90 degrees from FIG. 4.
Fig. 7 is a side view of the third embodiment, Fig. 8 is an end view thereof, Fig. 9 is a side view of the tip section shifted by 90 degrees from Fig. 7, Fig. 10 is a view showing the polished state, 11
12 is a side view of a conventional boring drill, FIG. 12 is an end view thereof, and FIG. 13 is a side view of the tip portion shifted by 90 degrees from FIG. 11. 1...Shank part, 2...Body part, 4, 22
...Chip discharge groove, 5, 21...Carbide chip, 6...
...center drill, 7...bottom cutting blade, 8...flank surface, 9,
23... rake face, 10... ridgeline, 11... △-shaped protrusion, 12... hairbiki blade.

Claims

[Scope of utility model registration request]

In a wood boring drill with a carbide tip, which has a central drill, a bottom cutting blade that extends from the center drill toward the outer periphery on both sides, and a hair-pulling blade on the outer periphery that extends from the bottom cutting blade, A protrusion with a cross section perpendicular to the axis is approximately △-shaped and the tip faces the direction of rotation is provided on the edge of the ivy, and the intersection of the extension surface of the flank of the bottom cutting blade and the ridge line on the cutting outer diameter of the protrusion is A boring drill for woodworking characterized by being formed into a hair cutting blade.