JPH05185288A - Production of electrode - Google Patents

Abstract

PURPOSE:To enhance the yield of a blank material by molding chromium copper to an electrode shape by cold rolling and subjecting the chromium copper to caulking and thread cutting of hafnium after hardening. CONSTITUTION:The chromium copper from a coil material is cold rolled and molded by a header to the electrode shape having a head part 1, a polygonal part 2 and a round cylindrical part 3 having a large diameter. After this chromium copper is hardened, the chromium copper is subjected to caulking of the hafnium to the front end of a head 1 and thread 40 cutting to the rear side part of the round cylindrical part 3. The electrode is produced in such a manner. As a result, the processing time is shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode manufacturing method, and efficiently provides an electrode used for arc machining.

[0002]

2. Description of the Related Art As a method of manufacturing a tip or electrode conventionally used for arc processing, a bar material such as chrome copper is quenched and then cut by an arc processing machine (welding machine). Etc.), the head part, the polygonal part, the round body part, and the screw part were formed, but the yield of the material was poor because of the cutting process, and there was a problem that it took a lot of processing time for cutting. .

Therefore, it is an object of the present invention to provide a manufacturing method which solves the above-mentioned problems of the prior art, improves the yield of raw materials, and shortens the processing time.

[0004]

The features of the electrode manufacturing method according to the present invention for solving the conventional problems and achieving the above-mentioned object are that unhardened chromium copper from a coil material is used for the head portion, the polygonal portion, After forming into an electrode shape having a large diameter round body by cold rolling with a header and quenching this,
Hafnium is caulked on the tip of the head and the thread is cut from the round body to the rear side.

[0005]

[Function] Since unquenched chrome copper from the coil material is used as the material, it is possible to perform the forming by adopting the cold rolling process by the header, eliminating waste such as cutting the material, and the head part. In addition, it is possible to form a polygonal portion and a round barrel portion, and it is possible to shorten the processing time. After cold rolling, quenching, caulking of hafnium, and threading from the round body to the rear side can obtain an electrode having strength and properties suitable for arc processing.

[0006]

EXAMPLES Examples of the present invention will be described below with reference to the drawings. FIG. 1 (FIG. 2) shows a front view of the electrode a before forming the head portion, and FIG. 3 shows a front view of the electrode a before screw cutting,
Reference numeral 1 is a head portion, 2 is a polygonal portion, 3 is a large-diameter round body portion, 4 is a thread cutting portion, and 5 is a groove in the middle of the polygonal portion 2.

In order to obtain the electrode a before the thread cutting,
For unhardened chrome copper from coil material, polygonal part 2 that becomes hexagonal by cold rolling with a header, round body part 3 with a diameter larger than polygonal part 2, and threading for forming screws The part 4 is simultaneously formed (see FIG. 1), and then the same cold rolling process is performed to form the head part 1 at the tip of the polygonal part 2 and form the groove 5 in the middle of the polygonal part 2 (see FIG. 3). .

The electrode a in the state of being simultaneously molded as described above
Since it is unquenched, cold rolling can be completed in a short time without difficulty. Next, the electrode a before being threaded is quenched. The quenching temperature is usually 1050 ° C to 1100 ° C. Then, after quenching, hafnium H having a diameter of 1.6 mm was caulked into the head portion 1 to a depth of 6 mm (Fig. 4).
Alternatively, the screw 40 is cut in the threading portion 4 in the previous step, and the entire electrode is plated and finished with nickel or the like (see FIG. 5). It is also possible to form the round barrel portion 3 long without forming the thread cutting portion 4 in the header and then cut the screw 40 of a required length from the rear end portion after quenching.

The present invention is not limited to the above-mentioned shape, but various shapes such as the number of corners of the head portion or the polygonal portion can be formed depending on the shape of the mounting portion on the arc machine side. 1, the polygonal portion 2, the large-diameter round barrel portion 3, and the screw 40 are required.

[0010]

According to the above-described electrode manufacturing method of the present invention, since chromium copper as a raw material is an unquenched material, each part can be formed by cold rolling with a header, and the yield of the raw material can be improved. In addition to increasing the cutting time, the processing time can be shortened compared with cutting, which brings a great advantage in manufacturing efficiency.

[Brief description of drawings]

FIG. 1 is a front view showing a semi-processed product before head processing.

FIG. 2 is a side view of the above.

FIG. 3 is a front view showing an electrode before thread cutting.

FIG. 4 is an enlarged cross-sectional view of a hafnium crimped portion of the head portion.

FIG. 5 is a front view showing a completed electrode.

[Explanation of symbols]

 a Electrode before screw cutting 1 Head part 2 Polygonal part 3 Round body part 4 Screw cutting part 5 Groove 40 Screw A Completed electrode

Claims (1)

[Claims] 1. An unhardened chrome copper from a coil material is formed into a shape of an electrode having a head portion, a polygonal portion and a round body portion having a large diameter by cold rolling with a header, and after quenching this, the head is formed. A method for manufacturing an electrode, characterized in that hafnium is caulked at the tip and screwing is performed from the round body to the rear side.