rotary tool

Abstract

To provide a rotary tool capable of performing V-groove processing or end face cutting of a substrate in one process while suppressing the generation of burrs. On the outer periphery of the disc-shaped base member, sawtooth-shaped blades are formed at predetermined intervals in the circumferential direction, and the blades are formed into an inverted V shape when viewed from the front, and a mounting portion is formed on the side of the rotation direction of the blade base. The inverted V-shaped piece is fixed on the mounting part when viewed from the front, and the inverted V-shaped piece is composed of a first inverted V-shaped piece with a lead angle on one inclined edge side and a second inverted V-shaped piece with a lead angle on the other inclined edge side. Shaped sheet configuration, the inclination angle of the other inclined evasion edge of the first inverted V-shaped sheet relative to the center line is formed smaller than the inclination angle of one inclined edge, and the second inverted V-shaped sheet is formed so that it is opposite to the center line when viewed from the front. The first inverted V-shaped pieces are bilaterally symmetrical, and the first inverted V-shaped pieces and the second inverted V-shaped pieces are arranged alternately along the circumferential direction.

Description

technical field [0001] The present invention relates to a rotary tool for forming a V-shaped groove on a printed circuit board, an aluminum substrate, a copper substrate, or the like, or for cutting an end surface of a substrate. Background technique [0002] Conventionally, a diamond blade saw used when forming a V-shaped notch in a workpiece such as a printed circuit board is known. The blade saw 1 as Figure 18 As shown, on the sheet fixing recess 3 provided on the outer peripheral edge of the circular saw base plate 2, welding and fixing such as Figure 19 The pieces 4 shown are V-cut at an angle α=about 30 degrees, and the diamond layer 5 of the pieces 4 is fixed on the entire surface on the rake surface 6 side of each piece 4 . [0003] When V-groove processing is performed on a printed circuit board or the like using this diamond blade saw 1 , burrs are likely to be generated at corners after V-cutting. Therefore, a diamond blade saw that does not easily generate bu...

AI Technical Summary

Problems solved by technology

[0003] When V-groove processing is performed on a printed circuit board or the like using this diamond blade saw 1, burrs are likely to occur at the corners after V-cutting.

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