JP3126563U - Groove forming tool for grooved bearings - Google Patents

Abstract

A groove forming tool for a grooved bearing reduces cutting resistance and accurately forms a groove width to be cut.
In a groove forming tool for a grooved bearing, a cutting member setting portion 111a that forms a polygon is provided on the outer periphery of a tip portion 111 of a mounting body 11 at the tip of the tool, and a diamond-shaped first blade is formed at each corner portion. The cutting member 12 provided with 121a, 122a and the second cutting blades 121b, 122b is configured and provided so that each cutting blade has a diamond shape.
The width of these cutting edges is the width of the groove formed by cutting.
[Selection] Figure 1

Description

  The present invention relates to a groove forming tool for a grooved bearing that forms a groove for generating a dynamic pressure in a lubricating fluid in a sliding bearing that performs a lubricating action by a fluid, and in particular, a mounting member on which a cutting member and a cutting member can be fixed. It is related with the tool structure comprised from a body and used for grooving.

In Japanese Patent Laid-Open No. 6-297226, “Groove forming tool for grooved bearing” published on October 25, 1994, a cutting projection 24 is installed on a setting unit 20 established on the tool 10, and the setting unit 20 Describes a structure in which an indent is formed, and a cutting protrusion 24 is fitted in the intermediate portion of the setting portion 20.

In the actual cutting process, the cutting protrusion 24 in the above-described known tool structure is easily damaged by the cutting resistance of the workpiece during cutting.

In addition, in US Pat. No. 5,860,077 published on November 17, 1998, “METHOD FOR FORMING GROOVES”, a machine part 14 is provided at the end of the grooving tool 11, and the machine part 14 is oriented in the axial direction of the work hole 21. By providing a cutting edge 14b in parallel and providing a radial cutting edge 14c in parallel with the circumferential direction of the working hole 21, and simultaneously moving toward the working hole 21 in the axial direction and the radiation direction, It is described that it is possible to form a groove 21 a for generating fluid pressure in the hole 21.

  As described above, the groove 21a to be cut by the known tool structure is such that the highest end and the lowest end of the groove 21a are easily flattened, do not have a sharp cutting edge surface, and a non-sharp flat surface generates fluid pressure. This is a factor that prevents the groove 21a to flow smoothly in the groove.

JP-A-6-297226 US Pat. No. 5,860,077

An object of this invention is to provide the tool structure which fixed the cutting member to the terminal of the mounting body.

In order to achieve the above-mentioned object, the “grooving tool for grooved bearing” provided by the present invention has one or more cutting members fixed to the end of the mounting body, and the first cutting portion and the cutting member are fixed on the cutting member. Having a second cutting part, the first cutting part and the second cutting part constitute a rhombus.

Comparing the present invention with known techniques, the present invention has the following advantages and effects.
(1) The cutting member 12 of the present invention is fixed on the cutting member setting portion 111a formed at the end 111 of the tool mounting body 11, and the cutting member 12 is joined to the cutting member setting portion 111a by a fitting method. Thus, the coupling strength between the cutting member 12 and the mounting body 11 is greatly improved.
(2) During cutting, the widths W1 and W2 of the cutting groove 13 are equal to the lengths D1 and D2 of the first cutting part 121 and the second cutting part 122, so the lengths D1 and D2 of the cutting member 12 are the cutting grooves. It is possible to determine 13 areas W1 and W2.

FIG. 1 shows an embodiment of the present invention. As shown in FIG. 1, the mounting body 11 and the cutting member 12 are provided, and one or more cutting member setting portions 111 a are provided at the end 111 of the mounting body 11. It is provided and fixed to one or more cutting members 12 (the mounting body 11 and the cutting member 12 can be formed integrally), and the first cutting portion 121 and the second cutting portion 122 are provided on the cutting member 12. And the 1st cutting part 121 and the 2nd cutting part 122 are comprised in a rhombus.
As shown in FIGS. 2 and 3, the first cutting part 121 is composed of a first cutting edge 121a and a second cutting edge 121b, and the second cutting part 122 is composed of a first cutting edge 122a and a second cutting edge 122b. Is done.

As shown in FIG. 4, during cutting, the width W1 of the groove 13 is equal to the length D1 of the first cutting portion 121, and the width W2 of the groove 13 is equal to the length D2 of the second cutting portion 122. .

The above description compares the present invention with known techniques, and the present invention has the following advantages and effects.

(1) The cutting member 12 of the present invention is fixed on the cutting member setting portion 111a opened by the end 111 of the mounting body 11, and the cutting member 12 is joined to the cutting member setting portion 111a by a fitting method. In addition, the bonding strength between the cutting member 12 and the mounting body 11 is greatly improved.
(2) During cutting, the widths W1 and W2 of the grooves 13 are equal to the lengths D1 and D2 of the first cutting part 121 and the second cutting part 122, so the lengths D1 and D2 of the cutting member 12 are It becomes possible to determine the widths W1 and W2.

In the present invention, preferred embodiments have been disclosed as described above. However, these are not intended to limit the present invention, and any person who is familiar with the technology can use various methods within the spirit and scope of the present invention. Variations and moist colors can be added, so the protection scope of the present invention is based on the content specified in the claims.

It is a three-dimensional exploded view of the present invention. It is a side view of this invention. It is a top view of the present invention. It is explanatory drawing of the locus | trajectory at the time of cutting of this invention.

Explanation of symbols

11 Mounting body 111 End 111a Cutting member setting part 12 Cutting member 121 First cutting part 121a First cutting edge 121b Second cutting edge 122 Second cutting part 122a First cutting edge 122b Second cutting edge 13 Grooves D1, D2 Long W1, W2 size

Claims (5)

  One or more cutting members are fixed on the outer periphery of the mounting body at the tip of the tool, and a first cutting portion and a second cutting portion each having a cutting edge are provided on the cutting member, and the first cutting portion and the second cutting portion are provided. A groove forming tool for a grooved bearing, wherein the cutting portion is formed in a diamond shape. The groove forming tool for a grooved bearing according to claim 1, wherein the first cutting portion is provided with a first cutting edge and a second cutting edge in parallel. The groove forming tool for a grooved bearing according to claim 1, wherein the second cutting portion is provided with a first cutting edge and a second cutting edge in parallel. The groove forming tool for a grooved bearing according to claim 1, wherein the mounting body and the cutting member are integrally formed. The groove forming tool for a grooved bearing according to claim 1, wherein a cutting member setting portion is provided at the end of the mounting body to fix the cutting member.

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