JPH0339203Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a ceramic cutting tool used for cutting unfired ceramic material into the shape of an insulator.

(Prior art) The manufacturing process for insulators involves cutting the outer surface of a cylindrical or cylindrical ceramic body extruded from a clay kneading machine with a cutting tool while rotating it, thereby carving out the shape of the cap of the insulator. is included. However, as is well known, insulators have one or more caps with intricate folds on the back, and it requires a high level of skill to carve these caps into precise shapes with a cutting tool. It had been. Recently, attempts have been made to carve out a large number of caps using numerically controlled machine tools, but a J-shaped cutting tool with an upwardly curved tip is moved to follow the folded shape of the cap. Since the large number of caps were cut out one by one while the process was being carried out, the disadvantage was that the machining required an extremely long time.

(Problems that the invention attempts to solve) This invention solves the conventional problems as mentioned above,
It was developed with the aim of creating a cutting tool for ceramics that can accurately carve the shape of an insulator's cap from a ceramic body in a short period of time.

(Means for Solving the Problems) The present invention has an uneven cutting edge on the top surface of the plate-shaped cutting tool body that corresponds to the plurality of folds on the back surface of the cap of the insulator, and also has an uneven cutting edge on the top surface of the cutting tool main body. It is characterized by a fishhook-shaped curved blade for cutting the surface side of the insulator cap.

(Example) Next, the present invention will be explained in more detail with reference to the illustrated example. 1 is a plate-shaped tool body made of a metal material with excellent hardness, strength, wear resistance, etc., such as tool steel. A mounting portion 2 for attaching to a cutting tool holder is formed at its base. On the upper surface of this cutting tool body 1, a cutting edge 3 having an uneven shape corresponding to the pleated shape of the back surface of the cap 11 of the insulator 10 is formed. Cutting blade 3
has a rake face 5 and a clearance face 4 on both sides, and the clearance angle is approximately 5 to 15°.

Further, the tip of the upper surface of the tool body 1 is formed into a downwardly curved fishhook-shaped curved blade 6 for cutting the surface side of the cap portion 11. The central portion 6a of the fishhook curved blade 6 is for cutting the innermost part of the cap 11 of the insulator 10, and the tip portion 6b of the fishhook curved blade 6 is for cutting the upper surface of the cap 11. It is for cutting. It goes without saying that this fishhook-shaped curved blade 6 is also provided with a rake angle substantially similar to that described above.

(Function) In the device configured in this way, the cutting tool body 1 is placed under the cap 11 from the side while rotating the ceramic material on which the rough cap shape has been formed in advance.
When the cutting blade 3 is fed in and moved upward, the uneven cutting blade 3 corresponding to the plurality of folds on the back side of the insulator cap formed on the top surface of the cutting tool body 1 will cut into a ceramic piece. The back surface of the cap 11 of the material is cut at once according to the pleat shape to form folds on the lower surface of the cap 11.

After cutting the shape of the back surface of the cap 11 in this way, if the cutting tool body 1 is lowered along the path indicated by the arrow in FIG. The innermost part of the cap 11 is cut by the central portion 6a. After that, as shown by the arrow, if the cutting tool main body 1 is lowered while retreating outward, the tip portion 6b of the fishhook-shaped curved blade 6
The surface of the cap 11 is smoothly cut into the desired shape, and when the cutting of both the front and back sides of one cap 11 is completed, the cutting tool body 1 is again fed toward the center of the ceramic material, and the same movement is repeated. is repeated. Note that these uneven cutting blades 3 and curved blades 6 have an appropriate relief angle in the range of 5° to 15°, so the belt-shaped shavings generated by cutting can be removed without damaging the ceramic material. This results in smooth discharge toward the outer circumference.

Although the above explanation was given for the case of manufacturing an insulator having a large number of shades in the vertical direction, the cutting tool for ceramics of the present invention can also be used as is for manufacturing an insulator having only one shade. .

(Effects of the invention) As is clear from the above explanation, the present invention uses an uneven cutting blade that corresponds to the plurality of folds on the back surface of the insulator's cap formed on the upper surface of the cutting tool body. The entire shape of the back surface can be cut at the same time, and the shape of the part from the innermost part of the cap to the upper surface can be continuously cut by the fishhook-shaped curved blade at the top end of the tool body. can. Therefore, according to the cutting tool for ceramics of the present invention, the shape of the cap of an insulator can be accurately cut out from a ceramic material in a short time, and it can greatly contribute to the rationalization of the insulator manufacturing process.

Therefore, the present invention has extremely great practical value as a cutting tool for ceramics that eliminates the problems of the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a side view showing the state of use. 1...Bite body, 3...Cutting blade, 6...Fish hook-shaped curved blade.

Claims (1)

[Scope of utility model registration request] The upper surface of the plate-shaped cutting tool body 1 has an uneven cutting edge 3 corresponding to the plurality of folds on the back surface of the insulator cap, and the tip of the upper surface of the cutting tool main body 1 is equipped with a fishhook for cutting the surface side of the insulator cap. A cutting tool for ceramics characterized by a curved blade 6 shape.