JPH0623648A - Cutting method and cutting tool used therefor - Google Patents

Abstract

PURPOSE:To provide an excellent cutting method wherein enough liquid is injected against a cutting point and a cutting tool used therefor, in a cutting tool employing a cutter chip. CONSTITUTION:By using a cutting tool wherein a cutter chip 3 is attached to the tip of a holder 11 togetherwith a clamp block 14, high pressure liquid is discharged through a delivery port 15, formed in the end face of the clamp block 14, toward a cutting point being a contact of the cutting edge of the cutter chip 13 with a work X or the vicinity of the cutting point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting method and a cutting tool used therefor.

[0002]

2. Description of the Related Art Conventionally, in cutting, a liquid such as oil or water is applied to the cutting portion for the purpose of cooling the cutting portion and removing chips. However, the cutting point itself is because the cutting edge of the workpiece and the cutting tool are in pressure contact,
It is not easy to apply enough liquid to the cutting point. If the liquid is not sufficiently applied to the cutting point, the cutting edge will be damaged by the cutting heat, and the chips with the cutting heat will cover the surface of the workpiece and a part of the machine. When heated and expanded and cutting in that state, the processing dimensions are distorted, the work surface is melted by the cutting heat, and the molten metal adheres to the cutting edge of the cutting tool to form a so-called "constituent edge" and cutting is possible. Since problems such as disappearance occur, the solution is strongly desired.

Therefore, recently, for example, in a cutting tool having a cutter tip 2 attached to the tip of a holder 1 so that liquid can be sprayed near the cutting point, as shown in FIG. 3 is formed so that the liquid can be sprayed toward the blade tip of the cutter tip 2 or a drill tool, etc., as shown in FIG. 4, a spiral water injection channel 4 is formed inside the blade, A tool that can spray liquid from the center of the tool tip has been developed and is used in some parts. In addition, corresponding to these tools,
For machine tools such as lathes and machining centers,
A tool having a water injection means communicating with the water injection paths 3 and 4 of the above tool has been developed.

[0004]

However, even if these tools with liquid spraying function are used, it is difficult to carry out sufficient liquid spraying on the cutting point. Particularly, as a cutting tool, a cutter made of cemented carbide or ceramics is used. In high-speed cutting using a tip, various problems are likely to occur due to insufficient liquid application, which is a problem.

The present invention has been made in view of the above circumstances, and provides a cutting tool using a cutter tip, which is an excellent cutting method capable of sufficiently applying liquid to a cutting point, and a cutting tool used therefor. The purpose is to provide.

[0006]

In order to achieve the above object, the present invention is a method of cutting by colliding a cutting edge with a workpiece, which is used as the cutting edge together with a clamp piece at the tip of a holder. With the attached cutter tip,
A cutting method in which a high-pressure liquid is discharged from a discharge port formed on the end face of the clamp piece toward a cutting point or a vicinity of the cutting point, which is a contact point between the cutting edge and a workpiece, is a first gist, and is a holder. The tip of the clamp piece is equipped with a cutter tip that is attached together with the clamp piece, and the high pressure liquid is discharged onto the end surface of the clamp piece toward the cutting point or the vicinity of the cutting point, which is the contact point between the cutting edge of the cutter tip and the workpiece during cutting. A second aspect of the present invention is a cutting tool in which a discharge port is formed and a water injection path communicating with the discharge port is formed in the clamp piece and the holder.

[0007]

In other words, the present inventor conducted a series of researches on a method of spraying a cutting tool having a cutter tip closer to the cutting point. Then, in the process, I remembered that the water injection channel was directly formed in the tip mounting part, which was conventionally completely excluded from the target of the water injection channel formation. As a result, it is not possible to form a water injection channel on the cutter tip itself, but for the type with the clamp piece attached together with the cutter tip, if the liquid is sprayed from the clamp piece, the cutting point will be very sharp. The present invention has been achieved by finding that liquid can be applied from a close position.

Next, the present invention will be described in detail based on examples.

[0009]

1 is a plan view showing an embodiment of a cutting tool 10 used in the present invention, and FIG. 2 is a vertical cross-sectional view of the main part thereof. The cutting tool 10 is provided in the notch at the tip of the holder 11 so that the seat 1
A cemented carbide cutter tip 13 is placed via the two, and these two pieces are held by the clamp piece 14 in the holder 11
It is fixed to.

A discharge port 15 for discharging high-pressure liquid toward the tip of the cutting edge of the cutter tip 13 is formed in the end face 14a of the tip of the clamp piece 14, and the inside thereof is shown in FIG. So that the water injection passage 1 reaching the discharge port 15
6 are formed in the clamp piece 14 and the holder 11.

The cutting tool 10 is mounted on a known lathe device (having a function of pouring water into the water injection passage 16 of the holder 11), and the high pressure liquid is discharged from the discharge port 15 of the cutting tool 10 as shown in FIGS. When the cutting process is performed by discharging as shown by the arrow P, the chips and the cutting point cut out from the work piece X can be immediately cooled, so that most of the heat generated at the cutting point is the work piece X and the cutting tool 10. Work piece X does not conduct inside the cutter tip 13 of
The blade edge of is also not damaged by heat. As a result, high-speed cutting of the hard work X, which has had many troubles in the past, can be favorably performed over a long period of time.

In the above embodiment, the cutting tool 10 is used as the cutting tool, but the present invention is not limited to this, and may be a cutting tool of the type in which the cutter tip 13 is attached to the holder 11 together with the clamp piece 14. For example, it can be applied to anything. The clamp piece 14 does not necessarily have to be used for attaching the cutter tip 13 as in the above-mentioned embodiment, and in order to further reinforce the cutter tip 13 attached to the tip of the holder 11. There is no problem even if it is used. Of course, the target cutting tool is not limited to the one mounted on the lathe, but can be applied to those that can be mounted and used on various cutting devices such as a machining center and an NC lathe.

Further, the high-pressure liquid discharged from the clamp piece 14 may be water or oil, or may contain various chemicals. And
The discharge pressure is appropriately set according to the cutting conditions,
Generally, it is preferable to set it to ⁵ to 200 kg / cm ² .

The position of the discharge port 15 formed on the tip surface 14a of the clamp piece 14 and the arrangement of the water injection passage 16 are not limited to those in the above embodiment, but may be appropriately changed depending on the shape of the clamp piece 14, cutting conditions, and the like. Can be changed. Further, it is even more effective to prepare a plurality of clamp pieces 14 having different ejection port 15 positions (that is, ejection directions) and ejection ranges for the same tool, and use the clamp pieces 14 properly according to the purpose. Therefore, it is possible to carry out various liquid spraying and improve the cutting efficiency.

[0015]

As described above, the present invention uses, as a cutting tool, a tool provided with a high pressure liquid discharge port in a clamp piece used together with a cutter tip, and discharges high pressure liquid from the clamp piece toward a cutting point. It is something that is done. Therefore, according to the present invention, it is possible to perform liquid spraying in the very vicinity of the cutting point, which could not be achieved conventionally, and to instantaneously cool the heat generation at the cutting point. As a result, thermal damage to the workpiece and the cutting edge of the cutter tip can be prevented, and good cutting performance can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a cutting tool used in the present invention.

FIG. 2 is a vertical cross-sectional view showing a main part of the above embodiment.

FIG. 3 is an explanatory diagram of an example of a conventional cutting tool.

FIG. 4 is an explanatory view of another example of a conventional cutting tool.

[Explanation of symbols]

 10 bytes 11 Holder 13 Cutter tip 14 Clamp piece 15 Discharge port 16 Water injection channel X Workpiece

Claims (2)

[Claims] 1. A method for performing cutting by colliding a cutting edge with a workpiece, wherein a cutter tip attached to a tip of a holder together with a clamp piece is used as the cutting edge.
A high-pressure liquid is discharged from a discharge port formed on the end surface of the clamp piece toward a cutting point or a vicinity of the cutting point, which is a contact point between the cutting edge and a workpiece. 2. A holder and a cutter tip attached to a tip of the holder together with a clamp piece, the end surface of the clamp piece being provided at or near a cutting point which is a contact point between the cutting edge of the cutter tip and a workpiece during cutting. A cutting tool characterized in that a discharge port capable of discharging a high-pressure liquid is formed toward the discharge port, and a water injection path communicating with the discharge port is formed in the clamp piece and the holder.