JPH0341899Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention (industrial field of application) The invention is a chip used for arc welding. In detail, the present invention relates to a welding tip formed by joining two halves made of sheet metal so as to hold a wear-resistant base.

(Prior art) Conventionally, chips for arc welding that have been designed to improve durability by using wear-resistant ferrules are disclosed in Japanese Utility Model Application Publication No. 60-20372, Japanese Patent Application Publication No. 60-64779, Unexamined Japanese Patent Publication 1973
It is publicly known from publications such as No.-10842.

(Problem to be solved by the invention) In all of the conventional welding tips described above, a hole is made on the tip side of the tip body cut from a conductive round bar made of copper alloy, etc., and the hole is filled with wear-resistant material such as ceramic. Since it is fitted with a magnetic cap, it is heavy and inconvenient to handle and transport.It is also expensive due to high material and processing costs, and has the problem of poor cooling effectiveness due to its large heat capacity. It is something.

The present invention was developed to solve the above-mentioned conventional problems, and has excellent durability by combining two half-pieces made of sheet metal so as to hold a wear-resistant base. In addition, it is an object of the present invention to provide a welding chip that is lightweight, inexpensive, and has a good cooling effect.

B. Structure of the invention (means for solving the problem) The means of the invention for achieving the above-mentioned object is to form a conductive plate material by press working, and a holding part of the cap is formed on one end side, and a holding part of the cap is formed on the other end side. a pair of half bodies having a thread forming part in the middle thereof and a constriction part in the middle; means for joining these halves; a wear-resistant base held by the base holding part during coupling; and the constriction part. The welding chip is provided with a conductive portion provided on the inside of the welding tip and a mounting screw provided in the thread forming portion after coupling.

(Function) The welding chip configured as described above is formed by forming a pair of halves by pressing conductive plate materials,
A wear-resistant cap is held in the cap holding portion of these halves, and they are coupled by a coupling means, a conductive portion is formed by the constriction, and after coupling, a mounting thread is formed in the thread forming portion. Then, attach it to the welding head of the welding machine using the screw, establish continuity through the conductive part, accurately feed the welding wire to the welding part through the hole in the wear-resistant mouthpiece, and generate an arc to weld the object to be welded. These operations can be performed stably and reliably over a long period of time.

(Example) An example of a welding chip according to the present invention will be described below based on the drawings.

In each drawing, 1 and 1 are a pair of half bodies forming a welding chip, which are formed by pressing a plate material such as a copper alloy with excellent conductivity. As shown in Fig. 3, the shape of the side cross section is approximately circular, and the tip side is provided with a holding part a, which will be described later, and which is open at the tip side, and an inwardly constricted part b, b is provided at the middle part, and the other end side is provided with a portion c for forming a mounting screw (described later), and when these halves 1, 1 are joined by a connecting means to be described later, by sandwiching and squeezing the mandrel 2 between them, A conductive portion 3 that contacts and conducts with a welding wire (not shown) is formed.

Reference numeral 4 denotes a base made of a heat-retaining and wear-resistant material such as ceramic, and has a hole 5 in the center through which the welding wire described above is passed. , to be held by the holding part a.

6, 6 are means for connecting the half-divided bodies 1, 1,
As shown in Fig. 4, flanges connected to the edges of the half bodies 1, 1 are used, and the flanges 6, 6 are overlapped and molded into a corrugated shape, chevron shape, etc. using a press, as shown in the same figure. Alternatively, as shown in FIG. 5, provide a square claw 6 only on the edge of one half body 1, and bend this claw 6 to the other half body 1 as shown in the same figure. However, the method is limited to these joining methods. Of course, other means can be freely selected and adopted as long as a simple and reliable connection can be achieved.

Reference numeral 9 denotes a mounting screw provided in the above-mentioned thread forming part c, which is formed by a rolling means with excellent workability, and the completed welding chip is attached to a welding head (not shown in the drawing) of a welding machine using this screw 9. Then turn on the power and weld.

Reference numeral 10 denotes a hole provided in the end face of the aforementioned thread forming part c, and the central part of the end face is shaved so that the side where the welding wire is inserted is widened in a ragged shape so that the wire can be introduced smoothly. This is what I did.

In addition, since the above-described half bodies 1, 1 have the conductive part 3 only in the central constriction part b, if the current carrying capacity is insufficient, a carbon tube or the like is installed in the space inside the half bodies 1, 1. By inserting a welding wire into the welding wire and making it conductive by passing a welding wire through it, sufficient current carrying capacity can be obtained with a slight increase in weight and price.

C. Effects of the invention Since the main body of the welding chip of the present invention is formed by pressing a plate material, the weight of the product is reduced to less than a fraction of that of a conventional round bar product, making it convenient for handling and transportation.

Since the product is obtained by processing the plate material using a press that has excellent mass productivity, it can be manufactured at a lower cost than conventional products that cut round bars.

Since a heat-resistant and abrasion-resistant cap is attached to the tip of the tip, sufficient durability can be obtained even if it is made of sheet metal.

Chips made of sheet metal have a small heat capacity, so they are easy to cool and do not cause problems due to heat build-up.

It has the following unique effects.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view showing a completed welding chip according to the present invention. FIG. 2 is a longitudinal sectional front view of the cap holding part in the same as above. FIG. 3 is a vertical sectional side view of the half-split bodies being joined together with a mandrel inserted therein. FIG. 4 is a perspective view showing a first example of a means for joining the halves. FIG. 5 is a perspective view showing a second example of the means for joining the halves. FIG. 6 is a perspective view showing a third example of the means for joining the halves. 1, 1...Half body, a, a...Holding part of the cap,
b, b...constriction part, c, c...thread forming part, 3
...Conducting part, 9...screw.

Claims (1)

[Scope of utility model registration request] A pair of halves formed by press working of conductive plate material, with a cap holding part on one end, a thread forming part on the other end, and a constricted part in the middle, and the joining of these halves. means, a wear-resistant cap held by the holding portion of the cap during coupling, a conductive portion provided inside the constricted portion, and a mounting screw provided in the thread forming portion after coupling. A welding chip characterized by: