JPH0442069Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a welding device for projection welding, seam welding, etc., and particularly to a welding device that is capable of welding different types of workpieces.

[Conventional technology]

For example, a means for manufacturing a mounting member 3 for fixing the cylinder body 2 of an automobile shock absorber 1 to the vehicle body as shown in FIGS. The proposal described in is publicly known.

This mounting member 3 serves as a bracket for fixing the cylinder body 2 to the vehicle body, and is attached to an outer bracket 4 having an inner diameter 4a matching the outer diameter of the cylinder and an opening 4b communicating with the inner diameter 4a.
An inner bracket 5 having a U-shaped cross section is inserted from the inside, and a plurality of protrusions 5a formed on both outer side surfaces of the inner bracket 5 and the straight portion 4c of the outer bracket 4 are inserted.
It is formed by projection welding by applying the necessary pressure and welding current between the inner surface of the

The proposed means for manufacturing such a mounting member 3 includes a pair of upper and lower pressurizing electrodes, an intermediate electrode held between these pressurizing electrodes, and a pair of upper and lower pressurizing electrodes, an intermediate electrode held between these intermediate electrodes and the pressurizing electrode. and a clamp device that holds the mounting member 3 set between the electrode and the mounting member 3, and each of these parts is supported so as to be floating via an elastic mechanism such as a spring.

[Problem that the invention attempts to solve]

According to the above-mentioned conventional welding machine, the intermediate electrode and the clamp device can immediately respond to the movement of the pressurizing electrode during pressurization, so the pressurizing conditions of multiple welding points sandwiched between the intermediate electrode and the upper and lower pressurizing electrodes can be adjusted. This method is advantageous in that projection welding can be performed simultaneously in a stable state, and welding quality and workability are improved.

However, according to the structure of this welding machine, only one type of work can be welded, so in order to weld the same type of work with different specifications, such as the inner width of the inner bracket 5, it is necessary to deploy multiple dedicated machines each time. There was a problem that I had to do.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a welding device with a simple structure and excellent workability that can weld a plurality of types of workpieces to each other on the left and right sides.

[Means for solving problems]

In order to achieve the above object, the present invention includes a cylindrical support member for mounting and supporting a workpiece on the outer periphery, and a pair of left and right intermediate electrodes disposed movably in a direction perpendicular to the axis of the support member. , a pair of pressurizing electrodes are disposed oppositely above and below the intermediate electrode, and one of the intermediate electrodes and the pressurizing electrode performs pressure welding of the workpiece, and the other intermediate electrode performs pressure welding of the workpiece. The workpiece is pressed and supported by the support member using electrodes.

[Effect]

According to the above configuration, when welding a workpiece through one intermediate electrode, the other intermediate electrode functions as a clamping device, and when welding a workpiece through the other intermediate electrode, one intermediate electrode acts as a clamping device. It can function as a device, and the left and right intermediate electrodes can be used to suit multiple specifications.

Therefore, a plurality of types of workpieces can be welded on the left and right sides with the same welding device, improving work efficiency and reducing duplication of equipment.

〔Example〕

Hereinafter, one embodiment of a welding device according to the present invention will be described with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 to 3.
1 and 2, a cylindrical mandrel (not shown) into which the inner diameter 4a of the outer bracket 4 of the workpiece (mounting member) 3 shown in FIG. A support member) 6 is provided. A pair of upper and lower pressure electrodes 7, 8 and 9, 10 are provided at symmetrical positions with respect to the axis A of this mandrel 6, respectively. A pair of intermediate electrodes 11, 12 are provided between these pressure electrodes 7, 8 and 9, 10, and move forward and backward toward each other on a center line B perpendicular to the axis A.

Of the two pairs of pressure electrodes, the two upper pressure electrodes 7 and 9 arranged at symmetrical positions are supported by the movable electrode holder 13, and the upper pressure electrodes 7 and 9 are Two opposing lower pressure electrodes 8, 1
0 is supported by the fixed electrode holder 14.

In addition, these lower pressurizing electrodes 8, 10 and the above-mentioned 1
The pair of intermediate electrodes 11 and 12 are supported by the stationary electrode holder 13 via biasing means such as a spring 15 so as to be able to respond immediately to movement when the electrodes are pressurized.

Further, at a symmetrical position of the axis A of the mandrel 6, movable side and fixed side clamp devices 16, 17 and 18, 1 are provided on both sides of the intermediate electrodes 11, 12.
The movable side clamping devices 16 and 17 are provided on the workpiece entry/exit side to the mandrel 6, and the stationary side clamping devices 18 and 19 are provided on the workpiece receiving side of the mandrel 6, respectively. The movable clamp devices 16 and 17 can be opened and closed in the direction of arrow C by driving means such as a cylinder (not shown).

Furthermore, each of the above-mentioned clamp devices 16, 17, 1
8, 19 mandrel 6 and intermediate electrodes 11, 12
is raised to a predetermined position by a lifting device (not shown) during workpiece setting and workpiece removal, and is lowered to the welding position shown in FIG. 1 during welding.

Next, the operation of this embodiment will be explained.

First, the clamp devices 16, 17, 18, 1
9 and the intermediate electrodes 11 and 12 are raised together with the mandrel 6, and are waiting at the position of the work set line with the work entry/exit side of the mandrel 6 open.
The left and right intermediate electrodes 11 and 12 are selected for welding or clamping depending on the specifications of the workpiece.

For example, as shown in FIG.
1, the outer bracket 4 of the work 3 shown in FIG. 5 is inserted into the mandrel 6 through the opening 4b, and the inner bracket 5 is set in the opening 4b. After setting the work 3, move the movable clamp device 16 on the right side to arrow C.
the fixed side clamp device 18 on the right side.
The workpiece 3 supported by the mandrel 6 and the mandrel 6 is firmly clamped from the edge.

Next, the left intermediate electrode 12 is advanced to press and clamp the side surface of the work 3 against the mandrel 6, and the right intermediate electrode 11 is advanced to press the inner bracket 5 of the work 3 against the mandrel 6 from inside.
Press to firmly clamp.

The workpiece 3, which is fixed in position on the mandrel 6 in this way, is attached to the mandrel 6, the intermediate electrodes 11, 12
and clamp devices 16, 17, 18, 19 to a predetermined position, and the lower pressurizing electrodes 8, 10
contact the electrode surface.

Next, the upper pressurizing electrodes 7 and 9 are gently lowered via the movable electrode holder 13, and the intermediate electrodes 11 and
12 and the lower pressure electrode 8, the pressure force and welding current necessary for welding are applied between the upper, middle, and lower electrodes to weld the outer bracket 4 and inner bracket 5 of the work 3. A welding current is intensively applied between the plurality of protrusions 5a formed on the wafer and the contact portions are fused and bonded.

When welding is completed, the upper pressure electrodes 7 and 9 are moved upward, and the mandrel 6 and intermediate electrodes 11 and 12 are
The workpiece 3 is raised together with the clamping devices 16, 17, 18, and 19 to the workpiece set and conveyance line. Next, in the conveyance line, the intermediate electrode 1
1, 12 and the clamp devices 16 to 19 are opened, the workpiece 3 inserted into the mandrel 6 is automatically extracted from the rear of the mandrel 6 by an ejector (not shown) and supplied to the next process.

FIG. 3 shows a case where a workpiece 20 of a different specification is welded on the left side of the mandrel 6 in the figure. In this case, the only difference is that the clamping function and electrode function of the left and right intermediate electrodes 11 and 12 are opposite to those shown in FIG. 1, and other operations are the same as in the case described above.

According to this embodiment, the intermediate electrodes 11 and 12 are arranged on both sides of the mandrel 6, and one intermediate electrode has an electrode function and the other intermediate electrode has a clamping function. The intermediate electrodes 12 and 11 can be used depending on multiple types of specifications.

Therefore, it is possible to weld a plurality of types of workpieces on the left and right sides using the same welding device, and it is possible to improve workability and reduce duplication of equipment.

In the above embodiment, a case was explained in which a mounting member for fixing the cylinder body 2 of the shock absorber 1 to the vehicle body was manufactured as the workpiece 3.
Even if the workpiece 3 is another member having a similar shape, the same effect can be obtained. Furthermore, the welding method is not limited to projection welding, and can also be applied to, for example, seam welding.

[Effect of idea]

As described above, according to the present invention, a pair of intermediate electrodes are provided on both sides of a support member that supports a workpiece,
Since one side is used for electrodes and the other side is used for clamping, it can be used on both the left and right sides, making it possible to weld multiple types of workpieces with one welding device, improving work efficiency and reducing equipment requirements. be able to.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing the electrode structure of an embodiment of the welding device according to the present invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a longitudinal sectional view showing the operation of the present embodiment. 4 and 5 are a plan view and a side view, respectively, showing an example of a workpiece to be welded according to this embodiment. 3... Workpiece, 6... Mandrel (supporting member),
7, 8, 9, 10... Pressure electrode, 11, 12...
intermediate electrode.

Claims (1)

[Scope of utility model registration request] A cylindrical support member for mounting and supporting a work on the outer periphery, a pair of left and right intermediate electrodes disposed so as to be movable in a direction perpendicular to the axis of the support member, and a pair of left and right intermediate electrodes disposed oppositely above and below the intermediate electrodes, respectively. and a pair of pressure electrodes, one of the intermediate electrodes and the pressure electrode performs pressure welding of the workpiece, and the other of the intermediate electrodes presses and supports the workpiece against the support member. A welding device characterized by: