JPH0516005U - Throwaway tip - Google Patents

Abstract

(57) [Abstract] [Purpose] In the two-corner type throw-away insert for grooving or parting, it eliminates the restriction on the working depth and improves the mounting strength. [Structure] Cutting edges 2 and 2 for grooving or parting are formed at both corners of a long throw-away tip 1. The cutting edge parts 2 and 2 are at 90 ° to each other.
It is set to a shifted position. As a result, the bottom surface 4 at the time of mounting, which is out of phase by 90 °, has a V
Although it is formed as a character projection or a recess, a transverse engaging recess groove 5 is formed in a substantially central portion thereof. The engagement groove 5 is positioned by the pin 6 provided on the holder 3 to enhance the mounting strength.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a throw-away tip for grooving or parting, so that there is no particular restriction on the working depth and the mounting strength is improved.

[0002]

[Prior Art]

 Conventionally, as a throw-away tip for grooving or parting, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 62-53901, one having cutting edge portions formed at two corners of both ends thereof has been disclosed.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned two-corner type has a problem that the cutting depth is limited because the width of the cutting edge portion is wider than that of the central portion. Further, there was a problem that the mounting strength was not sufficient.

In view of the above, the present invention provides a two-corner type throw-away tip in which there is no restriction on the working depth, and the attachment strength thereof is also enhanced.

[0005]

[Means for Solving the Problems]

 The present invention has been made in view of the above-mentioned point, and the cutting edge portions formed at both ends are formed at positions shifted by 90 ° from each other, and the bottom surface at the time of mounting with a 90 ° phase shift is The engaging groove is formed so as to traverse substantially the central portion thereof.

[0006]

[Action]

 In the throw-away tip of the present invention, since the cutting edge portions are offset by 90 ° with respect to each other, the width thereof is small on the other hand, so that there is no restriction on the working depth. Further, since the engaging groove is formed on the substantially central bottom surface and is positioned by the pin, the mounting strength is also improved.

[0007]

【Example】

 An embodiment of the throw-away tip of the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a long throwing tip for grooving or cutting off, and cutting edge portions 2, 2 are formed at both corners thereof. The cutting edge portions 2 and 2 are set at positions offset from each other by 90 °. The 90 ° offset from each other is to eliminate the restriction on the working depth when the holder 3 is assembled, as shown by the phase lines in FIGS. 1 and 2. Further, when assembled in the holder 3, engaging bottom grooves 4 are formed on the bottom surface 4 when the holder 3 is mounted, and the engaging recess grooves 5 are formed so as to cross substantially the central portion thereof, and are positioned by the pins 6.

As shown in FIG. 3, a V-shaped projection is applied to the bottom surface 4 when the throw-away tip 1 is attached, and the V-shaped apex angle θ is, for example, θ. = 120 ° is set. This is to prevent lateral shift when seated and increase stability. Therefore, the V-shaped projection can also be applied to a V-shaped recess.

[0010]

[Effect of the device]

 As described above, according to the present invention, the cutting edge portions 2 of the two-corner type grooving or parting cutting away tip 1 are set at positions offset from each other by 90 °. There is an advantage that the workability is improved because there is no restriction on the depth. Further, since the engaging concave groove 5 that abuts the pin 6 of the holder 3 is formed on the bottom surface 4 side, the mounting strength is also improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a throw-away tip of the present invention.

FIG. 2 is a plan view.

FIG. 3 is an enlarged side view illustrating a relationship between a V-shaped apex angle of a seating bottom surface.

[Explanation of symbols]

 1 Throw-away tip 2 Cutting edge part 3 Holder 4 Seating bottom surface 5 Engagement groove 6 Pin

Claims (1)

[Scope of utility model registration request] 1. A cutting edge portion 2 which is grooved or cut off at both ends.
In a two-corner type throw-away tip in which is formed, the cutting edge portions 2 are formed at positions offset from each other by 90 °, and the bottom surface 4 at the time of mounting with a 90 ° phase shift is
A throw-away tip, characterized in that engagement grooves 5 are formed so as to cross substantially the center thereof.