JPS6040258Y2 - drilling tool - Google Patents

Description

[Detailed explanation of the invention] This invention is based on a hole in which, depending on the cutting conditions, a chip made of a material different from that of the main body is seated on a chip seat provided at the tip of the main body, and the chip is fixed to the main body with a presser foot. Akira is about tools.

In such tip-fixing type so-called indexable hole drilling tools, if the tip to be fixed is usually complex and must be held with one presser foot, the clamping force will be strongly applied to both ends of the presser foot. The force pressing down on the contact part of the chip becomes weak, making it impossible to securely attach it.

In addition, the tip may move due to incomplete clamping force of the tip during cutting, resulting in an accident with the drilling tool or damage to the workpiece.

Moreover, accurate processing was also impossible.

This invention solves the above-mentioned problems by forming the same number of claws as the plurality of tips on the gripping part of the presser foot, and using the claws to attach each tip to the main body accurately and strongly. The holes I made are related to tools.

Next, an embodiment of this invention will be described with reference to the drawings. At the tip of the drill body 1, tip seats 2 and 3 are located at the center line of rotation of the body.
- It is formed symmetrically to the left and right with respect to X.

A central tip seat 4 made of high-speed steel is located on the drill center line side of the tip seat 2 with the tip 15 exceeding the drill center line,
Further, an outer circumferential tip 5 made of cemented carbide is located on the outside in contact with the center tip 4, and each tip is connected to the grip part 7 of the presser foot 6.
is clamped by.

The gripping portion 7 has a holder 9 that straddles the contact surface 8 between the chip 4 and the chip 5.
is applied to form claws 10 and 11.

Therefore, when the presser foot 6 is tightened with the bolt 8 and the tips 4 and 5 are fixed with the claws 10.11, the tightening force is
1 and securely clamps the chips 4 and 5.

In addition, in FIG. 1, when attaching the outer circumferential tip 12 to the tip seat 3 located above, a countersunk screw 14 is inserted into the elongated hole 13 made in the tip, and the countersunk screw is tightened to attach the outer circumferential tip 12 to the drill body 1. The figure shows one in which the outer peripheral tip 12 can be adjusted in the radial direction by loosening a countersunk screw and moving the outer peripheral tip 12 along the elongated hole 13.

As mentioned above, this device clamps the tips by forming the same number of claws as the tips attached to the attachment part of the presser foot, so the clamping force acts evenly on multiple tips.
The chip became stronger and a lamp became possible.

This made it possible to drill holes accurately.

[Brief explanation of drawings]

FIG. 1 is a front view of essential parts of an embodiment of this invention, and FIG. 2 is a side view of FIG. 1. 1... Main body, 2, 3... Chip seat, 4
, 5... Chip, 7... Gripping part, 10
．． 11...nail, 12...chip.

Claims (1)

[Scope of utility model registration request] A chip seat is formed at the tip of the main body. A plurality of chips are seated on the chip seat, and the chips are fixed to the main body with a presser foot having the same number of claws as the chips on the gripping part. tool.