JPS6017641B2 - Throwaway tip fixing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fixing device for fixing a thrower device to a holder, and furthermore, the present invention relates to a fixing device for fixing a thrower device to a holder. A piece having a semi-circular indexable insert seat mounted on the insert seat and having a light facing the non-cutting edge side of the upper surface of the semi-circular indexable insert mounted on the insert seat is fixed to the holder; A throw-away chip is rotatably mounted in the chip seat, and the neck of the piece fixed to the holder allows the throw-away chip to be spread by the cutting resistance received by the cutting edge of the throw-away chip during cutting. This invention relates to a fixing device for an indexable tip, which is configured to receive the tip and reposition the cutting edge of the indexable tip to a fixed position.

Conventionally, in order to fix a throw-away tip to a holder, a hole is made in the throw-away tip, and the tip is fixed by using the pin's rope base, mirroring of the pin, or moving an L-shaped lever using screw force. Fixation methods have been used, such as directly screwing the chip, using a clamp, wedge, etc., or a combination of these methods. Of course, since the cutting force is large, the indexable tip must be tightened with a large force before being fixed to the holder.For this reason, the conventional fixing methods described above require the use of low-quality parts or A great deal of effort and time was required for installation and removal.

Furthermore, during use, fluctuations in cutting force cause wear and tear on the fixing fittings, causing various troubles. This invention was made in order to improve the momme point of the follower as described above, and it fixes the throw-away tip to the holder when it tries to spread due to the cutting resistance received by the cutting edge of the throw-away tip during cutting. The frame of the piece catches the paddy blade grain hawk of the throw-away tip and allows cutting to be carried out directly in position, and the throw-away tip can be easily replaced without having to be attached or detached using the presser piece. The purpose of this invention is to provide a fixed mounting of a throw-away tip that can be performed.

Hereinafter, the present invention will be described in detail based on the drawings showing embodiments. FIG. 1 shows the overall configuration of the present invention. The chip seat 1' is formed into a smaller cylindrical shape than the semicircular shape, and the thrower chip 2 is provided with a contact surface 2' having a semicylindrical cross-sectional shape along with the chip seat 1'. ing.

As shown in Figs. 3 and 4, the throw-away tip 2 may be a parallelogram in addition to a regular square, as long as it has a lateral surface 2' along the tip seat 1' of the holder 1. It may also have chip play power. In addition, the contact surface 2' does not need to be in full contact with the cylindrical surface of the chip seat. Needless to say, the cross-sectional shape may be such that the cylindrical surfaces at both ends of the indexable tip are in contact with each other on two sides within the tip seat.The indexable tip 2 is held in the holder 1. To do this, piece 3
the holder 1 with its jaw 3' facing the chip seat 1' opposite the main cutting edge 4 on the upper surface of the chip.
It is fixed by brazing or screwing. Next, returning to FIG. 5, the operation will be explained.

When the cutting force is applied to the cutting edge 4 of the insert 2, the corresponding forces P and Q are
is applied to the cutting edge 4 as a combined cutting force F, and this cutting force F generates a rotational moment M in the insert 2, and a distributed force R is generated between the contact surface 2' of the insert 2 and the insert seat 1 of the holder. Work and piece. This will act as a pressing force on the forehead 3' of No. 3.

In other words, when fixing the throw-away tip 2 to the holder 1, the main cut on the top surface of the throw-away tip can be made with the piece 3 without using parts such as pins for clamping, pressers, wedges, etc. that require vertical mounting operations with screws. Since the tip is held so that the opposite side of the blade 4, that is, the non-cutting edge side, is pressed by the jaw 3', when cutting force is applied, the semi-cylindrical tip 2' and the tip seat 1' come into contact, Cutting force F is dispersed, allowing stable cutting.

In addition, replacing the tip 2 is extremely easy because the throw-away tip is not fixed in the tip seat of the holder and only needs to be attached to the tip seat, and there is no wear and tear on the clamp parts or cutting troubles. It is easy to manufacture, low cost, and can fix the indexable tip with high precision.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention; Fig. 1 is an overall configuration diagram, Fig. 2 is a detailed elevational view of the same, and Figs. 3 and 4 are plan views showing an embodiment of the throw-away tip. Figure and side view, 5th
This figure is a view taken from the arrow in FIG. 2 showing the distribution of cutting force, and FIG. 6 is a plan view and a side view showing another embodiment of the throw-away tip. 1...Throwaway chip, 1'...Tip seat of the throwaway chip, 2...S0-away chip, 2'
...Contact surface of throw-away tip, 3...Piece, 3
'...Jaw, 4...Cutting blade of throw-away tip. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1 In a fixing device for fixing a throw-away chip to a holder, a throw-away chip seat with a cylindrical cross-sectional shape that is slightly smaller than a semi-cylindrical shape is provided on the head of the holder, and a semi-cylindrical throw that is attached to the chip seat is provided. A piece having jaws facing the non-cutting edge side of the upper surface of the away tip is fixed to a holder, and a throwaway tip having a shape with a contact surface along the inner surface of the tip seat is rotated into the tip seat. A fixing device for a throw-away tip, characterized in that the device is configured such that the cutting edge of the throw-away tip is positioned at a fixed position by the jaws of a piece fixed to the holder during cutting.