JPH0368783B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding jig device, and more particularly, the present invention relates to a welding jig device, and more specifically, a welding gun constituting an automatic welding machine, a support for supporting a workpiece clamp device, a workpiece receiving cover, etc., and a jig base are integrated. This invention relates to a welding jig device formed by molding.

When welding a workpiece using an automatic welding machine,
It goes without saying that the workpiece must be accurately positioned in accordance with the welding gun. The workpiece clamping device and the workpiece holder are used for accurate positioning of the workpiece, but for that purpose, the clamping device and the workpiece holder themselves also need to be securely fixed in a predetermined position.

Conventionally, for relatively large workpieces, such as the body of a passenger car, welding guns, workpiece clamping devices, and
Generally, the workpiece receiving cover is supported in a hollow manner through a bracket and welded. This type of automatic welding machine is shown in Figure 1. That is, the jig base 4 fixed by the jig positioning pins 2, 2
A plurality of metal plates 6 and 8 are arranged in a superimposed manner,
Brackets 10, 12, 14 and 16 are erected on this upper plate body 8, and each bracket 10, 1
A welding gun 18, a workpiece clamping device 20, and a workpiece receiving valve 22 are fixedly arranged at 2, 14, and 16. Therefore, in order to set the welding gun 18, workpiece clamping device 20, and workpiece receiving valve 22 at predetermined positions, the above-mentioned respective brackets 10 and 1 are used.
2, 14, and 16 must have high rigidity. This is because sufficient resistance is required to the placement of the workpiece in a predetermined position and the load during welding.
Moreover, the welding gun 18, the work clamp device 20,
Workpiece receiving cover 22 and brackets 10, 12,
The mounting surfaces 14 and 16 must also be machined with considerable precision. This is because if there is too much positional deviation, accurate positioning of the workpiece clamping device, etc. will not be achieved.

In the end, in the conventional technology, the mounting surface of the bracket, the welding gun fixed to the bracket, and the workpiece clamping device must be machined with considerable precision for positioning, making the manufacturing process complicated. Moreover, a considerable amount of time was required for these settings. In addition, we have to prepare a large number of metal plates to hold the bracket when installing the welding gun, workpiece holder, and bolts to tighten the clamping device to the bracket, and in the end, we have to prepare a large number of parts. This has led to further inconveniences such as an increase in the manufacturing cost of the product.

Therefore, as a result of intensive research and ingenuity, the inventor of the present invention found that if the welding jig base, bracket and gabari, and the mounting parts of the welding gun and clamp device are integrally formed by casting, the jig base and bracket of the conventional technology can be formed. It was found that precision machining of the positioning, guttering, welding gun, and clamping device attachment parts was no longer required, and the number of parts could be significantly reduced. Furthermore, a welding jig device with high rigidity was obtained, and the above problems could be eliminated. .

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a welding tool that has a small number of parts, allows for easy and accurate installation of a welding gun and clamp device in a short period of time, is easy to handle, and can be manufactured at low cost. To provide the equipment.

In order to achieve the above object, the present invention includes: a jig base; a plurality of columns erected at predetermined positions on the jig base; and a reinforcing frame extending in a predetermined direction from an end of the column. , a welding gun mounting part provided on a part of the reinforcing frame, a clamp mounting part and a workpiece holder, and the jig base, the support column, the reinforcing frame, the welding gun mounting part, the clamp mounting part, and the workpiece holder. It is characterized in that the gabari are integrally formed of the same metal material.

Next, the welding jig device according to the present invention will be described in detail below with reference to preferred embodiments and the accompanying drawings.

First, the apparatus of the present invention will be schematically explained in relation to the welding machine body to which it is attached, and then the welding jig apparatus will be explained in detail.

In FIG. 2, reference numeral 30 indicates a base on which a welding machine main body 32 is fixed. The welding machine main body 32 is
A pair of welding devices are arranged on the base 30 with a predetermined distance between them, and an object to be welded, for example, an automobile body 34 in this embodiment, is transported by a transport means 36 as appropriate. Each welding machine main body 32 includes support members 38, 38 erected thereon, and a rotating shaft 40 is bridged over the support members 38, 38. Note that a holding stand 42 is fixed to this rotating shaft 40. Therefore, a jig 44 is attached to the holding table 42.
is mounted and fixed, and a link mechanism (not shown) is energized, the holding table 42 is rotated in the direction of the arrow in FIG. This is then welded.

Therefore, in the above configuration, the jig 44
includes a jig base 46 (see FIG. 3). The jig base 46 has a substantially rectangular shape in plan, and positioning pins 48 are planted in the corners of the jig base 46 to be inserted into the welding machine main body 42 and for positioning the jig base 46. has been done. Furthermore, a drive system conduit 50 is embedded in the jig base 46 for supplying a predetermined current and pressurized air to a welding gun and a clamping device, respectively, which will be described later. Although not shown, the drive system conduit 50 receives a predetermined current or the like from the welding machine main body 42.

Next, a plurality of columns 52 are vertically erected from a predetermined position of the jig base 46, and a reinforcing frame 54 extending horizontally is provided at the upper end of the column. Workpiece catcher 5
6. Clamp mounting part 58 and welding gun mounting part 6
0 is formed. It goes without saying that the workpiece support 56 has a shape that follows the outer shape of a portion of the workpiece W to be supported. Furthermore, as mentioned above,
In the device of the present invention, a jig base 46, a plurality of supports 5
2. The reinforcing frame 54, the clamp mounting portion 58, and the welding gun mounting portion 60 are integrally formed by casting.
Therefore, a clamp device 62 is disposed in the clamp attachment portion 58 formed in the reinforcing frame 54, and a cylinder 64 for driving the clamp device 62 is firmly fixed to the reinforcing frame 54. On the other hand, the welding gun 66 is attached to the welding gun mounting portion 60 using a reinforcing member 68.
Fix it by. To fix it, a bolt passing through the auxiliary member 68 and the welding gun attachment part 60 and a nut screwed into the bolt may be used and tightened.

When the workpiece receiving cover 56, clamp mounting part 58, and welding gun mounting part 60 are formed by casting in this way, the groove 70 of the workpiece receiving valve, the flat surface 72 of the clamp mounting part 58, and the flat surface 74 of the welding gun mounting part 58 are formed. It will be understood that is formed almost exactly.

In the figure, reference numeral 76 indicates a power supply system for supplying a predetermined current to the welding gun 66.

The welding jig device according to the present invention is basically constructed as described above, and its usage and effects will be explained next.

First, after molding, the groove 70 and the flat surface 7 of the jig 44 are
If some irregularities or deviations are found on 2 and 74, they are reprocessed to smooth them out. Particularly, the workpiece receiving cover 56 may be digitized as information on the dimensions of the automobile body to be welded, and may be integrally processed based on this information. After a predetermined plane is secured, the jig 44 is installed. Therefore, in order to attach the jig 44 to the welding machine main body 32, positioning pins 48 extending from the jig base 46 are
is inserted into a hole (not shown) formed in the holding base 42 and fixed using a normal fixing means. As a preferable example, a hole 78 is provided at the tip of the positioning pin 48.
A possible method is to drill a hole 78 and insert a bolt (not shown) into the hole 78 and screw it into place. When the jig 44 is attached to the welding machine main body 32 in this manner, it can stand by as a jig in a welding state.

According to the present invention, as described above, the jig base, the clamp mounting portion, the welding gun mounting portion, the support that supports the workpiece receiving cover in a hollow shape, and the workpiece receiving cover itself are integrally formed by casting. . That is, there is no need to provide a separate bracket for holding a welding gun or the like, which was required in the past. As a result, the number of parts can be reduced, and there is no need to adjust the position of the bracket for accurately positioning the welding gun and clamping device. Furthermore, since the workpiece receiving gully is also integrated, even when machining the grooves of a plurality of gully holes, etc., it can be easily and integrally machined. Therefore, the machining accuracy is improved and it is possible to perform the machining at a low cost. Furthermore, overall weight reduction is facilitated by forming the struts and gabari into smaller sizes, making it easier to replace jigs, and since they are cast, there are advantages such as no deformation during welding.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that various improvements and design changes can be made without departing from the gist of the present invention. be.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway vertical sectional view of a welding jig device according to the prior art, FIG. 2 is an explanatory diagram showing the overall structure of an automatic welding machine, and FIG. 3 is a welding jig device according to the present invention. FIG. 30... Base, 32... Welding machine main body, 34...
Automobile body, 36...Transportation means, 38...Support member, 40...Rotating shaft, 42...Holding stand,
44... Jig, 46... Jig base, 48... Positioning pin, 50... Drive conduit, 52... Support column,
54...Reinforcement frame, 56...Work receiving gap, 5
8... Clamp attachment part, 60... Welding gun attachment part, 62... Clamp device, 64... Cylinder,
66... Welding gun, 68... Auxiliary member, 70...
Concave groove, 72, 74...plane, 76...power supply system, 7
8...hole.

Claims (1)

[Scope of Claims] 1. A jig base; a plurality of columns erected at predetermined positions on the jig base; a reinforcing frame extending in a predetermined direction from an end of the column; and the reinforcing frame. A welding gun mounting part provided in a part of the welding gun mounting part, a clamp mounting part and a workpiece receiving cover, and the jig base, the support column, the reinforcing frame, the welding gun mounting part, the clamp mounting part and the workpiece receiving cover are installed in the same part. A welding jig device characterized by being integrally formed from a metal material. 2. In the device according to claim 1,
A welding jig device consisting of a jig base, strut, reinforcing frame, welding gun mounting part, clamp mounting part, and workpiece receiving cover that are integrally formed by a casting process.