JPS5933525Y2 - clamp bite - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a crank bit, and its clamping mechanism has been improved to be particularly suitable for parting, grooving, or thread cutting.

Conventionally, with this type of clamp tool, the clamping strength has been a problem because the head of the holder cannot be made large, and there is a demand for improvement in terms of the clamping mechanism.

Therefore, the present invention was developed in view of the above points, and the tip of the holder is connected to a chip seat in which a cutting chip is placed and a housing part in which a wedge piece for suppressing and fixing the chip is received. In the clamp bit that is installed,
The chip seat is formed by a groove whose bottom surface slopes downward, and even with the presence of the accommodating portion, a portion of the rear wall remains at the bottom, and the chip seat has an inclined surface inside the chip seat. The back portion of the placed chip is pressed by the cooperation of the wedge piece that engages with the rear wall of the storage portion and the V hand cup, and the screw 11 screwed into the wedge piece,
It is fixed to the bottom and rear wall of the chip seat so as to create a wedge effect.

Hereinafter, one embodiment of the clamp bit of the present invention will be described with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a cutting tool holder, at the tip of which there is a chip seat 3 in which a cutting chip 2 is placed, and a housing part in which a wedge piece 4 for suppressing and fixing this chip 2 is received. 5 are installed in series.

The tip 2 is suitable for parting, threading, or grooving, and has a cutting edge portion 6 formed at one end thereof and a bottom surface 7 forming a V-shaped protrusion.

The chip seat 3 on which the chip 2 is placed has a bottom surface 8 forming a groove with a downward slope and a rear wall 9 so as to fit the bottom surface 7.

In this case, a portion of the rear wall 9 of the chip seat 3 is formed below due to the presence of the accommodating portion 5.

Further, the housing portion 5 has a V-half engagement between the rear wall 10 and the wedge piece 4, thereby ensuring the cooperation between the wedge piece 4 and the screw 11 screwed into it. It is.

In the illustrated case, the wedge piece 4 side forms a V-shaped protrusion, and the accommodating portion 5 side forms a V-shaped recess, but of course the reverse may be used.

Thus, the protruding ends of the wedge pieces 4 of the screw 11 are screwed into the screw hole 12 of the accommodating portion 5.

As a result, the wedge piece 4 moves along the rear wall 10 of the accommodating part 5 and presses the chip 2 on the other hand.

The clamp bit constructed in this manner is capable of sufficiently clamping even the narrow width of the cutting edge portion 6, and is suitable for parting, threading, or grooving.

This is caused by the suppressing action of the wedge piece 4.
This is because it gives a wedge effect to the bottom surface 8 and rear wall 9 of the chip seat 3, and functions reliably as a lamp.

In this invention, as explained above, the chip is pressed by a wedge piece, and at that time, the wedge effect acts on the chip within the chip seat, so the clamping can be done firmly and does not require a large space. It is suitable for cutting off, threading, or grooving, and has the advantage of improving cutting workability and extending life.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the clamp bit of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a left side view thereof. 1...Holder, 2...Chip, 3.
...Chip seat, 4...Wedge piece, 5...
... Accommodation section, 7 ... Bottom surface, 8 ... Bottom surface, 9 ... Rear wall, 11 ... Screw.

Claims (1)

[Scope of utility model registration request] In a clamp tool, a tip seat 3 in which a cutting tip 2 is arranged and a housing part 5 in which a wedge piece 4 for suppressing and fixing this tip 2 is received are arranged in series at the tip of the tool holder 1. The chip seat 3 has its bottom surface 8
is shaped by a downwardly sloping groove, and due to the presence of the housing portion 5, a portion of the rear wall 9 remains below. The chip 2 is attached to the rear wall 10 of the housing portion 5.
The opposite surface of the V-shaped bottom surface I is pressed by the cooperation of the wedge piece 4 that engages with the V-hand cup and the screw 11 screwed into it, and a wedge effect is imparted to the bottom surface 8 and the rear wall 9. A clamp bit characterized by being fixed.