JPS5915766B2 - cutting grinding tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting and grinding tool that allows correction of cutting edge dimensions.

In conventional tools, the dimensions and shape of the machined hole etc. are determined by the dimensions and shape of the cutting edge, so the cutting edge portion is precisely finished with high precision, making it difficult to manufacture the tool.

Furthermore, the cutting and grinding process causes wear and deformation of the dimensions and shape, which shortens the useful life and significantly increases the cost of the tool.

The present invention has been proposed to eliminate this drawback.
A cavity for supplying fluid is provided inside the support that supports the cutting blade, and by applying fluid pressure to this cavity, the support expands and the cutting blade dimensions can be corrected. It is characterized by the fact that

Although any known tools can be used as the tools, it is particularly suitable for low-cutting tools such as taps, drills, reamers, broaches, and cutters.

To explain the present invention with reference to the drawings of one embodiment, the drawing shows an example of a drill, in which 1 is a spiral cutting edge part, which is supported from the tip of the support 2 to the outer surface of the side surface, and applies rotational force to the support 2. Drilling is performed by giving

A cavity 3 is formed inside the cutting blade support part of the support body 2,
Fill this with fluid 4.

The fluid 4 is an incompressible liquid, a liquid metal, or an easily melted metal.

In addition, gel-like materials, metal, non-metal powder, etc. are used.

In particular, low-temperature heating fluid metals such as semi-molten metals and wood metals are good because of their heat resistance.

5 is a sealing material for preventing leakage of the fluid 4; 6 is a screw member for reinforcing the sealing material 5, which is screwed into the end of the support body 2;
The pressure of the internal fluid 4 is adjusted by adjusting the screw.

The thickness of the outer wall of the cavity of the support body 2 that supports the cutting blade 1 is set to a size and shape that allows expansion by pressurizing the internal fluid 4, taking into account the rigidity of the material.

In this way, the cavity filling fluid 4 is pressurized by screwing in the screw member 6, and applies fluid pressure to the support wall surface.

By pressurizing the fluid 4, this applied pressure can apply uniform expansion pressure to the entire wall surface of the cavity 3 according to Pascal's law.

Due to this fluid pressure action, the support body 2 is uniformly expanded as a whole to adjust the outer diameter dimension of the cutting blade 1.

Since the working fluid pressure increases or decreases in proportion to the screwing amount of the screw member 6, the dimensions of the cutting blade 10 can be controlled depending on the screwing amount.

Therefore, the dimensional accuracy of the cutting blade can be easily adjusted to high precision by adjusting the threaded member 6 to adjust the cutting blade dimensions during the manufacturing of the drill or when the cutting blade dimensions are worn out during use. be able to.

According to the tool of the present invention, a high-precision item can be easily obtained, which improves the machining accuracy of cutting and grinding, making it easier to perform the desired work, and even when the tool wears out, the thread ball of the same size and shape can be easily obtained. Since it is easy to do, it has the effect of significantly improving tool life.

Note that during correction machining in which the support body 2 is expanded by applying fluid pressure by screwing in the screw member 6, if the tool is placed in a mold of the desired size and shape and pressurized, pressure control and correction machining thereby become easy. Become.

The fluid 4 may be pressurized by a method of crushing a part of the support 2 other than by the screw member 6, and the fluid does not need to be always filled in the cavity, and external pressure may be used during correction processing. A correction method may also be used in which a cylinder or the like is used to press-fit a fluid.

[Brief explanation of the drawing]

The drawing is a configuration diagram of an embodiment of the present invention. 1 is a cutting blade, 2 is a support body, 3 is a cavity, 4 is a fluid, 5 is a sealing material, and 6 is a screw member.

Claims (1)

[Claims] 1. A cavity for supplying a fluid inside a support that supports a cutting blade is provided on the outer surface thereof, and the cavity is filled with a fluid that applies pressure, and the fluid pressure is applied to the walls of the cavity. A cutting and grinding tool characterized in that the cutting edge dimensions can be corrected by expanding the support body. 2. The cutting and grinding tool according to claim 1, which uses a liquid, liquid metal, easily melted metal, metal or nonmetal powder, or a mixture thereof as the fluid.