JPH059860U - Rotating saw tooth structure - Google Patents

Abstract

(57) [Summary] [Purpose] By making the cross-sectional shape of the tooth portion tapered so that the outer peripheral end surface is wider than the inner peripheral end surface, cutting resistance is reduced without subjecting the side surface of the tooth portion to a salient process. [Structure] A sintered body of diamond grains and metal powder is fixed to the outer peripheral portion of a disk-shaped base metal, and annular tooth portions surrounding the peripheral end surface and both side surfaces of the outer peripheral portion are provided by the sintered body. The tooth portion is formed in a tapered shape in cross section which gradually becomes wider as it goes outward in the radial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is for cutting or cutting hard and brittle materials such as blocks and concrete. It relates to the structure of the teeth of a rotating saw.

[0002]

[Prior art]

  As a conventional technique, there is one shown in FIGS. That is, it is formed into a disc shape While fixing the sintered body of diamond grains and metal powder to the outer periphery of the base metal 1, The sintered body forms an annular tooth portion 2 surrounding the peripheral end surface and both side surfaces of the outer peripheral portion. To do. The tooth portion 2 has a tooth thickness T3 formed to have an equal width from the inner peripheral edge to the outer peripheral edge. After the above-mentioned sintered body is fixed, both side surfaces 2a, 2a of the tooth portion 2 are subjected to a salient process, that is, both side surfaces. 2a, 2a is ground with a grindstone to remove the metal powder, and a die is attached to both side surfaces 2a, 2a. By projecting the yamond grains, this allows good discharge of chips during cutting and cutting resistance To reduce.

[0003]

[Problems to be solved by the device]

  In the above-mentioned conventional one, both side surfaces 2a of the tooth part 2 after the sintered body is fixed to the outer peripheral part of the tooth base 2, Since 2a was subjected to the eye-marking process, there was a drawback that the number of manufacturing steps increased and the cost became high. It is an object of the present invention to obtain a new tooth structure of a rotary saw that solves the above drawbacks. It

[0004]

[Means for Solving the Problems]

  In order to achieve the above object, the present invention provides a disc-shaped base metal, and an outer peripheral portion of the base metal. While fixing the sintered body of diamond particles and metal powder, A tooth portion surrounding the peripheral end surface and both side surfaces of the outer peripheral portion is provided. It has a configuration in which the cross-section is tapered so that the width becomes gradually wider as it goes toward It A slit extending in the radial direction along the outer periphery of the base metal at a predetermined pitch in the circumferential direction. Divide and fix the sintered body of diamond particles and metal powder to the outer peripheral portion, The sintered body is provided with a large number of tooth portions surrounding the entire peripheral surface of the outer peripheral portion. The part is formed so that the width becomes gradually wider toward the outer side in the radial direction and the cross section has a tapered shape. You may

[0005]

[Action]

  Since the present invention has the above-mentioned structure, the outer peripheral end surface of the tooth portion is cut during cutting. Only contacts the object to be cut, and both side surfaces of the teeth are separated from the cutting surface of the object to be cut. . Then, the chips cut by the outer peripheral end faces of the tooth part are separated from both sides of the tooth part and the object to be cut. It flows through the gap between the cutting surface and is removed to the outside.

[0006]

【Example】

  An embodiment of the present invention will be described below with reference to the drawings. In the drawings, FIG. FIG. 2 is a partial side view showing an embodiment, FIG. 2 is an enlarged sectional view taken along line II-II, and FIG. 3 is another embodiment. FIG. In FIG. 1, 5 is a rotary saw, and the outer circumference of a disc-shaped base metal 6. An annular tooth portion 7 is integrally provided in the portion. The tooth portion 7 is composed of diamond grains and metal powder. The sintered body made in 1. is fixed to the outer peripheral part of the base metal 6, and the sintered body It is formed by surrounding the peripheral end face and both side faces. In this case, the tooth portion 7 is formed as shown in FIG. The discontinuous tooth portion 7a may be divided in the circumferential direction. That is, the outer circumference of the base metal 6 has a radius Divided by a predetermined pitch in the circumferential direction by a slit 6a extending in the direction By surrounding the entire peripheral surface of the outer peripheral portion with the same sintered body as described above, the circumferential direction is divided. A large number of divided discontinuous tooth portions 7a are formed.

[0007]   The tooth portion 7 (discontinuous tooth portion 7a) has a thickness T1 of the outer peripheral end face 8 as shown in FIG. Is formed to have a tapered cross-section that is thicker than the thickness T2 of the inner peripheral end surface 9, for example, the outer peripheral end surface described above. The thickness T1 of No. 8 is 1.5 mm, the distance W from the outer peripheral end face 8 to the inner peripheral end face 9 is 4 mm, and the tooth portion The inclination angle θ of the side faces 10, 10 of 7 (discontinuous tooth portion 7a) is 2 degrees.

[0008]   Next, the operation and effect of the above embodiment will be described. When cutting the work piece, the teeth The outer peripheral end surface 8 of the portion 7 (discontinuous tooth portion 7a) contacts the object to be cut and cuts the object to be cut. It In this case, the both side surfaces 10, 10 of the tooth portion 7 (discontinuous tooth portion 7a) are Separated from both sides of the cutting surface, a gap is generated between the two. And the outer peripheral end face Chips cut by 8 flow through the gap and are removed to the outside. The resistance is reduced. The outer peripheral end surface 8 of the tooth portion 7 (discontinuous tooth portion 7a) is the inner peripheral end surface. 9 has a tapered cross section that is thicker than 9, so that even if the outer peripheral end face 8 is worn, The gap between the side surfaces 10 and 10 and both side surfaces of the cutting surface of the workpiece is maintained, and the cutting resistance Will not increase.

[0009]

[Effect of device]

  As is apparent from the above description, the present invention has a cross-sectional shape of the tooth portion in which the outer peripheral end face is the inner peripheral end. Since it is tapered so that it is wider than the surface, there is no need to cut the side surface of the tooth The cutting resistance can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a partial side view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is a partial side view showing another embodiment of the present invention.

FIG. 4 is a partial side view showing a conventional example.

5 is an enlarged sectional view taken along line VI-VI of FIG.

[Explanation of symbols]

5 rotating saw 6 money 6a slit 7 teeth 7a Discontinuous tooth part 8 Outer peripheral face 9 Inner peripheral end face 10 sides

Claims (2)

[Scope of utility model registration request] 1. A disk-shaped base metal is provided, and a sintered body of diamond grains and metal powder is fixed to the outer peripheral portion of the base metal, and the peripheral end surface and both side surfaces of the outer peripheral portion are fixed by the sintered body. The tooth structure of the rotary saw is characterized in that the tooth part is formed so as to surround the above, and the tooth part is formed in a tapered shape in cross section that gradually becomes wider as it goes outward in the radial direction. 2. The outer peripheral portion of the base metal is divided by a slit extending in the radial direction in the circumferential direction at a predetermined pitch, and the outer peripheral portion is fixed to a sintered body of diamond grains and metal powder, and the sintered body is also fixed. 2. A large number of tooth portions surrounding the entire outer peripheral surface of the outer peripheral portion are provided, and each tooth portion is formed in a tapered cross-section that gradually becomes wider as it goes outward in the radial direction. Structure of the teeth of the rotating saw described.