JP3169163U - Cutting tool - Google Patents

Abstract

The present invention provides a cutting tool capable of suitably processing a V-groove of 20? To 90? In a turning process using a urethane roll or an ultra-high molecular weight polyethylene roll as a work material. A three-dimensional shape breaker is formed on a cutting edge by dropping a grinding wheel of φ25 to φ40 from the upper surface into a rake face of a cutting tool using a tool grinder on a cutting tool having the same angle as a specified V groove angle in advance. The rake face shape is given 3 and when the side flank 7 is machined, a slight straight part 9 of 0.005 mm to 0.01 mm is left between the side flank 7 and the blade 10 to provide a specified angle. It is characterized by maintaining its shape. [Selection] Figure 1

Description

The present invention relates to a breaker shape of a cutting tool. In particular, the work material is not a metal, but relates to the shape of a breaker of a cutting tool using a resin material such as hard urethane or ultra-high molecular weight polyethylene as a work material.

Currently, rigid urethane rolls and ultra-high molecular weight polyethylene rolls are used as wire holding members for multi-wire saws for machine tools used for cutting silicon and solar sapphire and quartz. It has been broken. The hard urethane roll or ultrahigh molecular weight polyethylene roll is provided with V-grooves having a depth of about 0.3 mm, a V-groove angle of about 20 ° to 100 °, and a pitch of about 0.2 to 1 mm to hold the wire.

This V groove part is processed by cutting or grinding, but in the case of cutting, it is very difficult to process the V groove shape to the specified angle (20 ° ~ 90 °), There is a problem that uncut parts such as burrs and burr are generated, and the face is wound around the work material and cannot be processed well.
Further, there is a problem that it takes a very long time for grinding.

JP 2006-75969

Patent Document 1 says that V-groove processing of urethane can be performed with a lathe using a simple V-shaped tool, but with a simple V-shaped tool, processing of a resin system such as urethane or ultra-high molecular weight polyethylene is required. Is very difficult, the V-groove angle cannot be processed well, and burrs and burr occur.
Therefore, the V-groove processing to the resin material is suitably processed by cutting.

In addition, when machining with a lathe, there is a problem in that a facet is wound around the workpiece, and the workpiece is damaged or wound around a lathe chuck.

In order to solve the problem, the breaker shape 3 shown in FIG. 1 of the present invention is applied to the cutting edge of the cutting tool, thereby aiming to form a V-groove on a work such as a urethane roll or an ultra-high molecular weight polyethylene roll by turning. .

In FIG. 1, a special three-dimensional breaker 3 of the present invention and a breaker 4 for discharging a facet are machined into a tip of a high-speed tool steel throw-away type chip.

As shown in Fig. 1, the special breaker 3 uses a tool grinder to drop the grindstone from above onto a chip that has been machined to the same angle as the V-groove angle in advance. Finish in a simple shape. The shape of the grindstone used here may be either a straight one with R or a V face shape. By performing breaker processing using this method, a three-dimensional rake angle 3 along the V-groove angle can be formed.

What is important when turning urethane rolls or ultra-high molecular weight polyethylene rolls is the sharpness of the cutting tool in consideration of the accuracy of the V groove angle of the workpiece and the distribution from the center of the V groove angle. It is well known that a larger negative rake angle is used to increase the sharpness of the cutting tool.

The negative rake angle is a grindstone diameter of 35 and a rake angle of about 20 ° to 35 °. A rake angle of 30 ° to 45 ° can be processed with φ30. The diameter and shape of the grindstone are not limited here.

Using the same method, cut the chip breaker breaker 4 to the left and right of the breaker 3.

V-grooves of 20 ° to 90 ° could be obtained by V-grooving of urethane rolls with a chip provided with the special breaker of the present invention.

Top view, side view, front view of throw-away chip for V-groove 90 ° machining Details of part A in Fig. 1 Part B details of Fig. 1 A simplified illustration of the breaker machining method of the present invention A diagram showing the resulting shape from FIG. Top view when throw-away tip is attached to tool Side view when the throw-away tip is attached to the bite

The chip breaker of the present invention was devised for V-groove machining on a work such as a urethane roll or an ultra-high molecular weight polyethylene roll. This V-groove processing is performed at a wide angle from 20 ° to 90 ° by a manufacturer or user of a multi-wire saw. Therefore, this chip first manufactures a chip of each angle, and the specified V-groove processing is realized by processing the breaker of the present invention without breaking the angle.

The chip breaker of the present invention processes this shape by rotating the grindstone as shown in Fig. 4 and dropping it into the part where the breaker is to be attached. At this time, the blade tip is sharpened by cutting the tip portion 5 of the blade from 0.005 mm to 0.05 mm.

Further, the chip discharger breaker 4 is also processed to the left and right of the breaker 3 by using the method of FIG. By applying this to the chip, it is possible to suppress the winding of the facet around the work and to escape in the direction where the breaker is attached.

After processing the breaker of the present invention in this way, the specified angle is maintained by processing the straight portion 9 leaving 0.005 mm to 0.1 mm so that the side flank 7 does not hit the blade edge.

In FIG. 6, 16 is a byte body. The throw-away tip of FIG. 1 is pressed and fixed to the tip seat 17 and the side wall 15 by screw cap bolts at the tip seat 17 portion. Further, the chip seat 17 may be integrated with the holder body structure, or may be a cemented carbide, coated cemented carbide, ultra-high pressure sintered body or ceramics tightened with screws as a base plate separately from the holder body structure. And In addition, the throw-away tip is fixed by pressing the pin component to the side wall 15 by tightening the pin component with a screw, even if it is pressed and fixed from the top using a flat-head screw or clamp component instead of the screw cap bolt. Whatever is present is good.

Further, the chip shape of the present invention may be a cutting tool whose blade portion is integrated with the shank. The lathe used may be a general-purpose lathe or an automated lathe.

The present invention relates to grooving turning. In particular, it is suitable for V-groove processing of resin-based workpieces such as urethane and ultra-high molecular polyethylene.

1, straight part
3. Special 3D breaker
4, chip breaker breaker
5, Cutting edge tip
6, hole through which the chip passes
7, side relief
9, Straight part enlargement part
15, holder side wall
16, holder body
17, chip seat

Claims (1)

The throw-away tip attached to one end of the bite body 16 is a bite having a specially shaped breaker formed by using a special grindstone using a tool grinder.

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