JPS5844984A - Welding method for wheel - Google Patents

Abstract

PURPOSE:To prolong the life of a drum by interposing intermediate materials consisting of a material stronger than base materials for a disc and a rim between the disc and the rim, and melting the intermediate materials to join both thereby suppressing the damage from the weld zones of the formed wheel. CONSTITUTION:Prior to execution of welding, intermediate materials 4 consisting of a material (e.g.; high tensile steel) having strength higher than that of steel plate materials for a rim 2 and a disc 3 are interposed between both. The materials 4 are constituted of small pieces such as balls 5, a ring 6, a flat bar 7 or the like. More specifically, the mateials 4 are interposed in plural places, usually 8 places along the circumference between the rim 2 and the disc 3. The places interposed with the materials 4 are spot welded with the electrodes placed on the outside circumference of the rim 2 and the inside circumference of the disc 3, whereby both are joined and an intended wheel is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for strengthening a welded portion when manufacturing an automobile wheel by welding a rim and a disk.

An automobile wheel having a bath welded structure is usually manufactured by forming a rim and a disc from steel plates and joining them together by welding or projection welding. What is the lifespan of welded construction wheels?

Small wheels are tested using a drum test in which the wheel is rotated to see how many revolutions it has completed before cracking occurs, but fatigue cracks often appear in the welds, which determines the lifespan.

Conventionally, the method of prolonging the life of a wheel for spot welded wheels was to increase the fit between the rim and the disk to reduce the stress applied to the spot weld. However, when the insertion allowance is increased, there are problems such as the wheel deforming greatly when the wheel is inserted and making the acupuncture process difficult. Also.

For projection welded wheels, one energizing path is used (II)
Although it is small because it is limited! On the one hand, it has the advantage that a ridiculous nugget is formed, but because the projection part is made of the same material as the base metal, the nugget strength is determined by the base material components, and it is difficult to increase the welding strength. There was a problem.

SUMMARY OF THE INVENTION The present invention aims to provide a method of welding wheels that can be easily implemented on-site to strengthen the nugget, in view of the fact that the life of the wheel can be extended.

Through this, the purpose is to locally extend the life of the wheels.

The method of the present invention will be explained below with reference to the drawings.

Fig. 1 shows a # contact structure wheel l.

It consists of a welded joint between a rim 2 and a disc 3. An inclusion 4 is interposed between the rim 2 and the disk 3 prior to welding. The material of the inclusion 4 is a material with higher strength than the material of the rim 2 and the disc 30, which serve as the main shavings, and for example, Noriten can be used.

The shape of the inclusion 4 is one ball 5, ring 6. It is composed of small pieces such as a flat rod 7. In order to eliminate this inclusion 4 as shown in FIG. 2, a plurality of IF'ph
, usually inserted at 8 locations. VCfMK on the outside of the disk 3 by pressing and slightly embedding the inclusion 4 on the outer periphery of the disk 3, gluing it with an adhesive, or temporarily attaching it with stop welding, etc. Then, the rim 2 is fitted onto the outer periphery of the rim 2 by press-fitting or the like.

Next, an electrode is applied to the outer periphery of the rim 2 and the inner periphery of the tissue 3 at the location where the inclusion 4 is interposed, and spot welding is performed to complete the joining of the two.

Items 41 and 5 refer to other embodiments of the present invention. In the 4th N and 51st octopuses, an annular groove is formed on the circumference of the disk 3.

A ring 8 extending over the entire circumference of the disk 3 is fitted into this groove by shrink fit or the like. Ring 8 also disc 3
．． It is made of a material with higher strength than the rim 2. In this state, rim 2
A part of it is spot welded or the entire circumference is shear welded. This completes the welding of the wheels.

Since the wheel welding method of the present invention is the same as described above, 1
When using the method of the present invention, the following effects can be obtained.

First, the strength of the welded part is higher than that of the base metal, which prevents damage from the welded part and extends the life of the wheel drum.

Furthermore, since welding is performed with inclusions interposed, nuggets can be reliably formed, and the reliability of the strength of the spot weld or sea A weld is improved.

Furthermore, since it is an f# weld with inclusions, the indentation of the weld is shallow compared to the conventional method, and there is less reduction in plate thickness, which is also advantageous in terms of fatigue and extends the service life. It can be measured.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an automobile wheel to which the method of the present invention is applied. FIG. 2 is a front view of FIG. Figure 3 is a perspective view of the inclusions interposed between the rim and the disc in Figure 1. (A) is a ball, (B) is a ring, (
C) shows an inclusion consisting of a rod. FIG. 4 is a sectional view of an automobile wheel to which another embodiment of the present invention is applied. FIG. 5 is a front view of FIG. 4. 1 fist e... Wheel 2... - Rim 3... Writing disc 4... e... Inclusion Figure 1 (A) 0゜e 2nd hearing Figure 3

Claims (4)

[Claims] (1) When manufacturing a wheel by welding a disc and a rim, an inclusion made of a material that is stronger than the base material of the disc and rim is interposed between the disc and the rim to prevent nuclear inclusions. A method for welding wheels in a wheel bath, characterized in that the wheels are joined in a static state. (2) If the inclusion is not a small piece in the shape of a ball, ring, or rod, the inclusion is partially placed on the disk circumference -F, and the disk and rim are spot welded at the inclusion part. A wheel welding method according to claim 1, characterized in that: (3) The inclusion is comprised of a ring, the inclusion is fitted around the entire circumference of the disk, and the disk and the rim are in contact with the rim over the entire circumference of the inclusion. A method for welding a wheel according to scope 1. (4) The inclusion is comprised of a ring, the inclusion is fitted around the entire circumference of the disk, and the disk and the rim are spot-welded at a part of the inclusion. A method for welding a wheel according to scope 1.