JPS62178010U

JPS62178010U -

Info

Publication number: JPS62178010U
Application number: JP6583586U
Authority: JP
Priority date: 1986-04-30
Filing date: 1986-04-30
Publication date: 1987-11-12
Anticipated expiration: 2001-04-30
Also published as: JPH0533203Y2

Description

[Brief explanation of the drawing]

第１図ないし第６図は本考案の一実施例を示す
図であつて、第１図はその軸線方向先端視図、第
２図はその側面図、第３図は第２図中―線に
沿う矢視断面図、第４図は第１図中矢印部分の
拡大図、第５図および第６図は第１図ないし第４
図に図示された切刃チツプを示す図であつて、第
５図はその平面図、第６図は第５図中―線に
沿う矢視断面図、第７図および第８図は他の切刃
チツプを示す図であつて、第７図はその平面図、
第８図はその側面図、第９図および第１０図は従
来のスローアウエイ式ドリルの一例を示す図であ
つて、第９図はその側面図、第１０図はその軸線
方向先端視図、第１１図および第１２図は従来の
スローアウエイ式ドリルの他の一例を示す図であ
つて、第１１図はその側面図、第１２図はその軸
線方向先端視図である。３…スローアウエイ式ドリル、４…切刃チツプ
、５…切刃チツプ、３１…工具本体、４１…上面
、４２…下面、４３…主切刃、４４…主側面、４
５…副切刃、４６…副側面、４７…切刃、Ｃ…軸
線。 Figures 1 to 6 are views showing one embodiment of the present invention, in which Figure 1 is a top view in the axial direction, Figure 2 is a side view, and Figure 3 is a line taken along the line in Figure 2. FIG. 4 is an enlarged view of the arrowed part in FIG. 1, and FIGS.
5 is a plan view thereof, FIG. 6 is a sectional view taken along the line in FIG. 5, and FIGS. 7 and 8 are views showing other FIG. 7 is a plan view of the cutting tip;
FIG. 8 is a side view thereof, FIGS. 9 and 10 are views showing an example of a conventional indexable drill, FIG. 9 is a side view thereof, and FIG. 10 is a view as seen from the tip in the axial direction. 11 and 12 are views showing another example of a conventional indexable drill, in which FIG. 11 is a side view thereof, and FIG. 12 is a view as seen from the tip in the axial direction. 3... Indexable drill, 4... Cutting blade tip, 5... Cutting blade tip, 31... Tool body, 41... Upper surface, 42... Lower surface, 43... Main cutting edge, 44... Main side surface, 4
5... Minor cutting edge, 46... Minor side surface, 47... Cutting edge, C... Axis line.

Claims

[Scope of utility model registration request]

It is an indexable drill in which two or more cutting tips are detachably attached to the tip of a tool body, and the cutting tips have a triangular shape in plan view, and have an upper surface serving as a flank surface, and a top surface serving as a flank surface. a lower surface parallel to the upper surface;
Each of the two side ridges serves as a cutting edge, and this cutting edge includes a main cutting edge and a sub-cutting edge connected to one end side of the main cutting edge and whose intersection with the main cutting edge is convex toward the outer periphery. A main side surface serving as a rake surface is formed between the main cutting edge and the lower surface, and a minor side surface serving as a rake surface is formed between the minor cutting edge and the lower surface, and the two or more The cutting edge tips are disposed with their upper surfaces facing toward the tip of the tool body, and one of the three cutting edges formed on each of the two or more cutting edge tips is arranged so that they are close to each other in the tool body. It is arranged point-symmetrically with respect to the axis of the tool body, and is arranged outward from near the axis of the tool body with the minor cutting edge on the inner circumference and the main cutting edge on the outer circumference, and the inner circumference side end A throw-away drill whose edge is spaced apart from the axis of the tool body.