JPS6118896A - Fixing device for whetstone of cutter for radioactive sample - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention has a device for fixing a grindstone for cutting radioactive materials, more specifically a mechanism that can be easily attached and detached from a cutting machine for cutting radioactive materials, The present invention also relates to a grindstone fixing device that has a mechanism for preventing cooling water from entering and can be attached to a cutting machine as an assembly.

BACKGROUND ART Conventionally, a grindstone, which is the cutting part of a cutting machine that handles radioactive materials, has been directly fixed to the main body of the cutting machine, as shown in FIG. That is, in FIG. 3, the grindstone 302 is fixed with a flange 303 and a nut 304, with the center hole of the grindstone 302 fitted into the grindstone attachment main shaft 301 of the cutting machine.

In this method, when the fitting tolerance is small, it becomes difficult to fit the main shaft and the grindstone, flange, etc.

Therefore, workability is poor.

Further, the work of fitting the grindstone into the main shaft of the cutting machine is usually performed by operating a manipulator, but the work is delicate and the force is concentrated locally, often deforming and damaging the grindstone. In particular, this tendency becomes stronger because whetstones made of thin materials with brittleness<0.5+a+ or less are generally used.

Furthermore, according to the prior art, the grinding wheel for cutting the radioactive sample is directly built into the main shaft of the cutting machine and is in contact with the cutting machine, so cooling water flows through the grinding wheel during the cutting process to the temperature of the cutting machine. The cooling water flows around the main shaft and further into the main body, causing contamination by the cooling water, making appropriate maintenance work difficult.

OBJECTS OF THE INVENTION The present invention aims to provide a novel grindstone fixing device that solves the problems of the conventional techniques.
An object of the present invention is to provide a grindstone fixing device that prevents breakage and prevents contamination of the cutting machine main body and surrounding cooling water. We have invented a grindstone fixing device that can pre-fix a grindstone that can be attached to a cutting machine as a wheel assembly without being directly attached to the main shaft.

This grindstone fixing device includes a hollow grindstone fixing shaft, a plurality of ribs provided on the outer periphery of the fixed shaft, means for fixing the grindstone to one end of the fixed shaft, and means for fastening the cutting machine and the grindstone fixing device. It is characterized by consisting of.

FIG. 1 shows an external view of the grindstone fixing device 2 of the present invention.

The present invention will be described in detail with reference to FIG. 1. Reference numeral 1 indicates a main shaft of the cutting machine main body, and 107 indicates a screw hole in the main shaft of the cutting machine main body.

202 is a fixed shaft of the grindstone fixing device 2, which is hollow in order to be attached to the main shaft l of the cutting machine main body. A plurality of boxwoods 203 are arranged around the outer periphery of the fixed shaft 202 to prevent cooling water from getting around.A grindstone 209 is attached to one end of the fixed shaft by a flange 204 and a nut 205. is fixed. When attaching the whetstone to the fixed shaft, use the kakuji jig shown in Fig. 4.

The main shaft 401 of the mounting jig 4 has the same diameter as the main shaft of the cutting machine, and is shaped to fit into the hollow part of the fixed shaft 202. The pin 402 is a rotation stopper when attaching the whetstone to the fixed shaft 202, and the whetstone is fixed by inserting it into the corresponding hole of the fixture 202.9 Figure 5 shows the state in which the whetstone fixing shaft is attached to the extra edition jig 4. FIG.

When installing the whetstone, place the board of the mounting jig on a flat surface and fix it with the main shaft 4 inserted into the hollow part of 202, with Ol facing up, drop the whetstone 209 and flange 204 onto it, and tighten with the nut 205. Just that is enough.

The grindstone fixing device 2 equipped with the grindstone fixed in this manner is configured to attach the fixing bolt 206 to the hole 1 at the tip of the main shaft 1 of the cutting machine.
07 through a hole 208 provided at the tip of the grindstone fixing shaft 202.

FIG. 2 is an external view showing the state in which the grinding wheel surface placement according to the present invention is applied to a low-speed precision cutting machine.

Effects of the Invention The grindstone fixing device according to the present invention, which can be attached to the cutting machine as an independent wheel assembly without the need to directly fix the cutting wheel to the cutting machine, facilitates the grindstone replacement work of the cutting machine and shortens the work time. This greatly improves work efficiency.

In addition, since it is only necessary to fix the fixing device of the present invention to which the grindstone is attached in advance to the cutting machine, deformation and breakage of the grindstone are greatly reduced during grindstone replacement work using the manipulator handle. Furthermore, by providing multiple flanges around the outer periphery of the whetstone fixing shaft, it is possible to prevent the contamination of the cutting machine body and its surroundings from spreading due to cooling water.

As a result of using the grindstone fixing device of the present invention in a low-speed precision cutting machine, the above-mentioned remarkable improvement effect was demonstrated.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the grindstone fixing device before it is attached to a cutting machine, Fig. 2 is a perspective view showing the grindstone fixing device of the present invention attached to a low-speed precision cutting machine, and Fig. 3 is a perspective view of the grindstone fixing device according to the prior art. FIG. 4 is a perspective view showing the grindstone mounting jig, and FIG. 5 is a cross-sectional view showing the mounting jig shown in FIG. 4 inserted into the hollow part of the grindstone fixing device.

Claims (3)

[Claims] (1) It has a hollow grindstone fixing shaft, a plurality of ribs arranged around the outer periphery of the grindstone fixing shaft, means for fixing the grindstone to one end of the fixed shaft, and means for making it possible to attach and detach the grindstone from the cutting machine. A grindstone fixing device used in a cutting machine for radioactive samples. (2) The cutting machine and the grindstone fixing device can be attached and detached by means of a fixing bolt inserted into a hole at the tip of the main shaft of the cutting machine and through a hole provided at one end of the fixed shaft. A grindstone fixing device according to claim 1, which is configured as follows. (3) The means for fixing the grindstone to one end of the fixed shaft has the same diameter as the main shaft of the cutting machine, and is shaped so as to be fitted into the hollow part of the grindstone fixed shaft, thereby preventing the rotation of the grindstone. The grindstone fixing device according to claim 1, which is formed on a substrate having a pin for stopping.