JPS63149088A - Spot welding equipment - Google Patents

Abstract

PURPOSE:To perform the rapid automatic welding without being restricted by a place by advancing movable electrodes to a welding place and enabling to perform the welding from one direction. CONSTITUTION:A base part 4 is moved in the direction of an object to be welded by a handle 9 and an ascending and descending plate is moved up and down by a normally and reversely rotating motor and the movable electrodes 19 and 20 provided thereto are set at the position corresponding to the welding place of the object to be welded. At the same time, a roller 24a of the tip of a supporting rod 24 provided at the opposite side is abutted on a rail 23a of a fixed frame 23. After that, the movable electrode 19 and 20 are advanced to the welding place and its neighborhood by gun cylinders 21 and 22 and when electrified, a closed loop of the movable electrode 19 a side wall a base frame the movable electrode 20 is constituted and the welding is performed. In this way, the welding can be performed from one direction and there is no restriction by the place and the rapid welding can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a spot welding device, which performs welding from one direction without being subject to space limitations.

Moreover, it is characterized by enabling rapid automatic welding.

[Conventional technology]

Spot welding involves applying mechanical pressure to the welding part of the workpiece by holding it between fixed and movable electrodes, and at the same time welding is performed using the heat generated by passing an electric current.The above pressurizing operation requires time and space. It was subject to certain restrictions.

Conventionally, spot welding is configured in a C-shape.

A spot gun with fixed and movable electrodes on opposite sides was used.

When using the above spot gun to weld the underframe and side walls of a railway vehicle, for example, it is necessary to set the spot gun from below the welding point, and then to weld the other welding points, such as the window. In this case, a spot gun had to be set from the side of the welding area.

[Problem that the invention seeks to solve]

The C-shaped spot gun described above is extremely heavy, and setting it at the welding point is labor intensive and inefficient, requiring skill for accurate welding. Without space, knowledge was difficult to use.

The present invention eliminates the above-mentioned drawbacks, allows welding from one direction, is free from space limitations, and has a structure that allows rapid automatic welding.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes a platform provided on a freely movable cart so as to be movable and adjustable in a direction crossing the running direction, a guide column erected on the platform, and a guide column erected on the platform, which is arranged parallel to the guide column. an elevating plate that is moved up and down by a rotary screw provided therein; a plurality of movable electrodes that are provided on the elevating plate and are capable of advancing and returning in the same direction as the movement adjustment direction of the platform;
A support rod is provided on the opposite side of the movable electrode and prevents the above-mentioned parts from moving toward the rear side between the opposing fixed frame.

[For production]

INDUSTRIAL APPLICATION This invention is utilized for welding the object to be welded which has predetermined rigidity, and welding the object to be welded which has given predetermined rigidity.

That is, the movable electrodes α) are provided in the same direction and do not clamp the welding area.

Therefore, it is most suitable for welding an underframe (α) and a side wall (5) having sufficient rigidity, such as in the structure of a railway vehicle.

Furthermore, if the welding location does not have a certain level of rigidity, a rigid material may be placed on the side opposite to the movable electrode 01 of the welding location.

The present invention first includes a handle (9), a forward and reverse rotation motor α→
As a result, the movable electrode α9 is set at a position corresponding to the welding part of the welding object.

Thereafter, the support rod (C) is brought into contact with the fixed frame, and movement of each part, especially the tilted part of the elevating plate, toward the rear side is prevented. After that, the movable electrode α1 (7) is advanced to the welding point and its vicinity using the gun cylinder 01) and the foundation, and when energized, the movable electrode ff1Ql → side wall (A) → underframe (α) →
A closed loop of movable electrodes is constructed to perform welding.

〔Example〕

Figure 1 shows the structure of a railway vehicle as the object to be welded.
An example is shown in which the underframe (α) and the side wall (6) are welded.

That is, the underframe (α) and the side wall (6) each have rigidity and are supported in fixed positions, and their welded portions are overlapped.

One aspect of the present invention is that it can run freely parallel to the structure of the railway vehicle.

That is, a rail (1) is provided parallel to the structure, and a movable cart (2) is provided on the rail (1).

The truck (2) is driven by a motor (3) mounted on the truck (2).

Next, a platform (4) for movement adjustment in a direction intersecting the running direction is provided on the truck (2).

In other words, the platform (
4) Match the engagement groove (6) provided on the lower surface, and further screw the screw (7) rotatably supported on the trolley (2) into the bracket etc. provided below the platform (4). By rotating the screw (7) with the handle (9), the screw (7) can be freely adjusted to move in a direction crossing the traveling direction, that is, in the direction of the welding object.

Further, a guide column αQ is erected on the platform (4).

The guide column αO is constructed in a suitable manner, with a vertically elongated hole α■ formed in the center, a guide rail (6) provided in parallel on the negative side, and rotated by a forward and reverse rotation motor αJ on the other side. A rotating screw o4 is provided.

Further, the guide rail (1a) is provided with an elevating plate αυ that is moved up and down by the rotating screw α→.

That is, the elevating plate αυ is provided with matching grooves @ at positions corresponding to the guide rails αa, and a bracket α is extended to the rotating screw αφ side through a vertically elongated hole aη, and a female threaded hole αφ formed at the tip thereof is provided. is screwed together with the rotating screw α.

Furthermore, a movable electrode α91 (a) that can freely advance and return to the elevating plate 09 in the same direction as the movement adjustment direction of the platform (4) is provided.
will be provided.

In other words, each movable electrode
■It is configured so that it can freely advance to and return to the welding object side due to the slope.

In the case of the drawing example, the upper movable electrode α is used as a welding electrode for pressurizing the welding point, that is, the overlapping part of the underframe (α) and the side wall (b), and the lower movable electrode (1) The electrode constitutes an electrically closed loop together with the movable electrode a1.

Therefore, it is not necessary to apply strong pressure to the lower movable electrode (1), but it is only necessary to bring it into contact with the underframe (α) and make it possible to conduct electricity.

Further, on the opposite side of the movable electrode α1 of the elevating plate aFJ, a support rod (c) is provided between the opposing fixed frame to prevent the above-mentioned parts, especially the elevating plate α, from moving toward the rear side. .

That is, when the movable electrode (to) pressurizes the welding location, the truck (2), the platform (4), the guide column 00, and the elevator plate 0
→ and the movable electrode α9fA portion are supported so that they do not move toward the back side.

In the case of the embodiment shown in the drawings, the support rod Q4 is configured to be able to advance and return freely, and is provided with a roller (24α) at the tip, and the roller (24α) is connected to the rail (24α) provided on the fixed frame (A).
3α) It is configured to rotate on the top.

In other words, even when the trolley (2) is running, the support rods are always
are interposed between the fixed frame and the fixed frame, and are configured so that automatic welding can be performed sequentially.

However, the support rod (wealth) can be freely advanced using a cylinder.

It may be configured to return to its original state when the trolley (2) is traveling.

The present invention having the above structure has an underframe (the slope and the side walls) as shown in the figure.
Spot welding with A) can be performed automatically.

To be more specific, the platform (4) is moved in the direction of the welding object by the handle (9), the lifting plate α is moved up and down by the forward/reverse rotating motor α1, and the movable electrode αl is provided there. is set at a position corresponding to the welding part of the welding object.

At the same time, the roller (24α) at the tip of the support rod (C) provided on the opposite side is brought into contact with the rail (23α) of the fixed frame (A).

After that, the movable electrode αC4 advances to the welding location and its vicinity by the gun cylinder (c) and
Welding is performed by forming a closed loop.

Incidentally, in the above-mentioned embodiment C, automatic welding can be easily performed by program-controlling the rotor (3), the forward/reverse rotation motor αJ, and the gun cylinder υ (a).

〔Effect of the invention〕

According to the present invention, it is possible to weld from one direction, and therefore, there is only a space on one side of the welding point, so there is no space restriction, and there is no need for clamping between both electrodes, so welding can be performed quickly. This enables automatic welding.

[Brief explanation of the drawing]

Figure ■ shows one embodiment of the present invention, and Figure 1 (2)...
・Dolly, (4)...base part, αO...guide column, α
◆...Rotating screw, 09...Elevating plate, α9 wing・
・・Movable electrode, (to) ・・Fixed frame, (c)・・
・Support rod.

Claims (1)

[Claims] A platform provided on a freely movable trolley so as to be movable and adjustable in a direction intersecting the running direction, an elevating plate that is moved up and down by a rotating screw provided in parallel with a guide column erected on the platform, and the elevating and lowering plate. a plurality of movable electrodes provided on the plate and capable of advancing and returning in the same direction as the movement adjustment direction of the upper platform;
A spot welding device characterized by comprising a support rod provided on the opposite side of the movable electrode and preventing movement of each of the above-mentioned parts toward the rear side between the support rod and the opposing fixed frame.