JPH0438952Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a welding chiller for cooling the heat generated near the welding part during arc welding.

(Prior Art) In the automobile assembly process, MIG arc welding or TIG arc welding has traditionally been widely used for joints in areas where appearance is important, such as rear fenders and roof panels. In such arc welding, there is a problem in that thermal distortion occurs because the welding part of the workpiece becomes high temperature, and it takes a lot of time and effort to correct the distortion.

In order to cope with this time, it is necessary to cool down the heat in the welding area by appropriate means, and various measures have been taken in the past. For example, Utsukai 58-
As described in Japanese Patent No. 9276, it has been proposed that a welding area is held between a pair of welding jigs formed to match the shape of the welding area. Attempts have also been made to cool the welding part of the workpiece by constructing the welding jig with a good thermal conductor or by providing a cooling water passage within the welding jig.

(Problems to be solved by the invention) When using a welding jig such as the one described above, it is customary to perform arc welding after temporarily welding the welding area by spot welding. Due to variations in processing accuracy and thermal strain caused by spot welding, deformation may occur in the welding jig clamping portion, and there may be portions where sufficient adhesion of the welding jig is not achieved. If the degree of adhesion of the welding jig is insufficient, the cooling performance will be reduced and large thermal distortion will occur, resulting in the problem of being forced to make repairs.

This invention was made in view of the above points,
The purpose of this invention is to ensure sufficient adhesion between a welding chiller serving as a welding jig and a workpiece, thereby sufficiently cooling a welded part of the workpiece.

(Means for Solving the Problems) In the present invention, as a means for solving the above problems, a welding device that is placed near the welding area of the workpiece and acts to cool down the heat generated at the welding area during welding. The chiller is composed of divided pieces made of a highly thermally conductive material that are divided into a plurality of pieces and connected so as to be mutually displaceable, and each divided piece is provided with suction means for adhering to the work surface. There is.

(Function) In the present invention, the following effects can be obtained by the above means.

In other words, the welding chiller is composed of a plurality of divided pieces, and these divided pieces are connected so that they can be mutually displaced, so that even if the work surface near the welding area is deformed, each The divided pieces are independently displaced and arranged along the work surface, and in this state, each divided piece is suctioned and fixed to the work surface by the suction means, and the degree of adhesion between the chiller and the work surface is adjusted. can be ensured. Therefore, the heat generated at the welding part of the workpiece is efficiently absorbed by the chiller, and the entire welding part is effectively cooled, which reduces the occurrence of workpiece thermal distortion during arc welding. This can be significantly reduced.

(Embodiments) Hereinafter, some preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiment 1 FIGS. 1 and 2 show a welding chiller according to Embodiment 1 of the present invention.

The welding chiller A of this embodiment is arranged near the welding area 3 between the rear fender 1 and the roof panel 2 as the workpiece W, and acts to cool down the heat of the welding area 3 generated during arc welding. The divided pieces 4, 4 made of a highly thermally conductive material (for example, copper) divided into a plurality of pieces, and the strings 5, 5 that connect these divided pieces 4, 4 so as to be able to displace each other. and fixed guides 6, 6 connected to both ends of the strings 5, 5. These divided pieces 4, 4, . has been done.

Each of the divided pieces 4 has a through hole 7 that passes through it vertically.
is formed, and a permanent magnet 8 is fitted and fixed in the through hole 7, which acts as a suction means for suctioning and fixing the divided piece 4 to the work surface. The bottom surface of each divided piece 4 is polished to improve adhesion to the work surface, and between the permanent magnet 8 and the bottom surface of the divided piece 4, there is a gap between the divided piece 4 and the work surface. A slight gap S (approximately 0.2 mm) is provided to ensure good adhesion. As the permanent magnet 8, it is desirable to use a fairly strong magnet such as a cobalt magnet in order to ensure the degree of adhesion of the divided pieces 4 to the work surface.

Next, the operation of the welding chiller according to the illustrated embodiment 1 will be explained.

Before the work W, the rear fender 1 and the roof panel 2, are arc welded, they are prepared by temporarily welding the vicinity of the welding area 3 by spot welding.
Strain deformation often occurs on the workpiece surface during this spot welding process. The welding chiller A is installed along the welding part 3 of the workpiece W prepared in this way, but at this time, the divided pieces 4, 4, . . . It will be installed in accordance with the surface shape of the workpiece W in the vicinity, and the bottom surface of each divided piece 4 will come into close contact with the workpiece surface, and in this state it will be tightly fixed to the workpiece surface by the attraction force of the permanent magnet 8. . After installing the chiller A along the welding part 3 of the workpiece W in this way,
Arc welding is performed by running an arc welding torch (not shown) along the guide surface 4a formed on each divided piece 4. In the process of arc welding, high heat is generated in the welding area 3, but this high heat is quickly absorbed by the divided pieces 4, 4... made of a highly thermally conductive material that are in close contact with the work surface, and then Heat is radiated into the air from the surfaces of the pieces 4, 4, and the welding area 3 is efficiently air-cooled. Therefore, thermal distortion of the workpiece W during arc welding is significantly suppressed.

Further, the length of the welding part 3 of the workpiece W usually varies depending on the type of workpiece, but in that case, it can be easily accommodated by increasing or decreasing the number of the divided pieces 4.

Embodiment 2 FIG. 3 shows a welding chiller according to Embodiment 2 of the present invention.

In the case of the welding chiller of this embodiment, as a suction means for adsorbing each divided piece 4 to the workpiece W,
A suction pad 8' made of a heat-resistant material is employed. That is, the recess 9 formed on the bottom surface of the divided piece 4
A suction pad 8 is attached to the outer periphery of the fixture 10 vertically installed, and the pressure is reduced by air suction through the through hole 11 formed in the center of the fixture 10.
The suction pad 8 is configured to be suctioned onto the work surface. Reference numeral 12 denotes a screw hole 13 formed from the upper surface of the divided piece 4 toward the recess 9.
A passage 14 communicating with the through hole 11 is formed in the bolt 12 . The passage 14 is connected to a vacuum suction device (not shown) via a joint 15 and a connecting pipe 16.

The other configurations and operations are the same as those of the first embodiment, so their explanations will be omitted.

It goes without saying that the present invention is not limited to the configurations of the embodiments described above, and that the design can be modified as appropriate without departing from the gist of the invention.

(Effects of the invention) As described above, according to the invention, the welding chiller, which is placed near the welding part of the workpiece and acts to cool down the heat generated at the welding part during welding, is divided into multiple pieces. It is composed of divided pieces made of a highly thermally conductive material that are connected to each other so as to be able to be displaced from each other, and each divided piece is provided with a suction means for adhering to the work surface. Even if the workpiece surface near the welding area undergoes shape deformation due to welding, each divided piece will be displaced independently and placed along the workpiece surface, and in this state, each divided piece will be attached to the workpiece by suction means. Since they are fixed to each surface by suction, it is possible to ensure close contact between the chiller and the workpiece surface. Therefore, the heat generated at the welding part of the workpiece is efficiently absorbed by the chiller and then radiated into the air, which effectively cools the entire welding part, resulting in arc welding. This has the practical effect of greatly suppressing the occurrence of thermal strain on the workpiece during the process.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the installation state of a welding chiller according to Embodiment 1 of the present invention, Fig. 2 is an enlarged sectional view of Fig. 1, and Fig. 3 is according to Embodiment 2 of the present invention. FIG. 2 is a sectional view of a main part of a welding chiller. 3...Welding site, 4...Divided piece, 8...Permanent magnet (attraction means), 8'...Adsorption pad (attraction means),
W...work.

Claims (1)

[Scope of utility model registration request] It is placed near the welding part of the workpiece and acts to cool down the heat generated at the welding part during welding, and is made of a highly thermally conductive material that is divided into a plurality of parts and connected so as to be mutually displaceable. 1. A welding chiller comprising two pieces, each of which is provided with suction means for adhering to the work surface.