JPH1190685A - Method and device for connecting/welding two or more works - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly improve a working ratio by connecting two or more works, with the intermediate connecting jig of a cylindrical part held in-between, placing the cylindrical part rotatably on a middle supporting base, attaching both ends of the connected works to a rotatable clamp jig, and welding the works while rotating them. SOLUTION: By connecting a work W to both ends of an intermediate connecting jig 5, the middle part with the jig 5 can be supported by the middle supporting base 7, other than at both ends by a pair of clamp jigs 3, 4. Accordingly, the device can load twice as many works W compared with the one supporting at both ends with the pair of clamp jigs 3, 4 only. In addition, since the works only need to be connected to the pair of clamp jigs 3, 4 while they are placed on the middle supporting base, the position of the connected works W can be easily adjusted to the clamp jigs 3, 4, facilitating the loading operation. The device enables adjustment of the height of two supporting rollers 22 on which the intermediate connecting jig 5 is placed, facilitating the adjustment of the rotary axial center even when the intermediate connecting jig 5 is changed in accordance with the works.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for connecting and welding two or more workpieces. More particularly, the present invention relates to an automatic welding apparatus for welding two or more workpieces such as steel column cores while connecting and rotating the workpieces, and a connection welding method capable of connecting a large number of workpieces such as steel column cores. And equipment.

[0002]

2. Description of the Related Art Conventionally, in an automatic welding apparatus for connecting and rotating two or more workpieces while rotating, for example, as shown in FIG. 10, four workpieces W are connected and shown in FIG. As shown in FIG. 12, the workpiece rotation support device 7 is rotated between the drive-side clamp jig 73 and the driven-side clamp jig 74 of the workpiece rotation support device 71.
Welding is automatically performed by the welding devices 72 arranged in parallel with each other.

[0003] A workpiece W shown in FIG. 10 is a steel column core, and is formed by welding a rectangular plate-shaped diaphragm 51 to both ends of a square cylindrical column 50. The weld joint Wa of the steel column core W is provided at two places on both sides at the outer periphery of the contact portion between the square column 50 and the diaphragm 51. Steel column core W
Are connected using a connecting jig 60 shown in FIGS. 8 and 9 so that the steel column cores W are coaxial. In the connection example as shown in FIG. 10, for example, four steel column cores of 500 mm × 22 mm in thickness × 500 mm in length are connected, and the total weight is 290 kg × 4 = 1160 kg.

[0004] A conventional workpiece rotation support device 71 shown in FIG. 11 includes a drive side 76 fixed to an abutment 80 and an abutment 80.
10 is provided with a driven side 78 slidable on two rails 79 provided between the driving side clamp jig 73 and the driven side clamp jig 74 as shown in FIG.
A series of connected workpieces (steel column cores) W can be attached and rotated.

[0005] A welding device 72 shown in FIG. 12 includes a welding robot 10 that is automatically controlled, a moving device 11 that slides the welding robot 10 toward a welding joint Wa of a workpiece W, a control device thereof, and a welding device. It consists of a power supply and a cooling water circulator (not shown).

[0006]

However, in such a conventional connection welding apparatus, it is possible to connect the workpiece to the shape and weight of the workpiece based on the mounting capacity of the workpiece rotation support device and the strength of the connection jig. Number is limited. For example, if a device with a mounting capacity of 2000 kg is adopted,
There is a problem that a reinforced pillar core of 800 mm × 40 mm in thickness × 800 mm in length and weighing 1310 kg cannot be mounted by connecting two or more pieces.

[0007] This means that automatic welding must be performed by mounting only one workpiece. For example, in the case of unmanned operation at night, the welding time of one reinforced pillar core is □ 800 mm and 4 mm. Since it is about 5 hours, the automatic welding is completed in the middle of the night, which leads to a problem that the time until the remaining morning cannot be effectively used. Therefore, an automatic welding apparatus capable of connecting two or more reinforced pillar cores so that welding of at least two reinforced pillar cores is performed continuously is desired.

Therefore, it is first conceivable to increase the mounting capacity of the workpiece rotation supporting device to increase the strength of the connecting jig. However, the deformation of the workpiece due to its own weight increases, and excessive load fluctuations occur during rotation. Occur repeatedly, which significantly reduces the life of the apparatus and the connecting jig, and has a problem that the equipment investment effect is not attained in spite of an increase in equipment cost.

On the other hand, the work of mounting the connected workpieces on the apparatus is usually performed using a crane or the like. However, in the operation of the crane, fine adjustment of the vertical position is difficult, and the work takes a long time. There was also.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to increase the number of workpieces that can be mounted without increasing the mounting capacity, and to facilitate the mounting operation. Another object of the present invention is to provide a method and an apparatus for connecting and welding two or more workpieces, which can greatly improve the operation efficiency.

[0011]

According to a first aspect of the present invention, two or more workpieces are connected with an intermediate connecting jig having a cylindrical portion interposed therebetween, and the cylindrical portion can be rotated on an intermediate support. , The both ends of the connected workpiece are mounted between a pair of rotatable clamp jigs, and the two or more workpieces are rotated and welded. By connecting the workpieces to both ends of the intermediate connecting jig, an intermediate portion having the intermediate connecting jig can be supported by the intermediate support in addition to the double-sided support by the pair of clamp jigs. Therefore, it is possible to mount twice as many workpieces as those supported on both sides by only a pair of clamp jigs. In addition, since it is sufficient to connect the pair of clamp jigs while being placed on the intermediate support table, the positions of both ends of the connected workpiece can be easily adjusted to the clamp jigs, and the mounting operation is easy.

According to a second aspect of the present invention, in addition to the first aspect, the intermediate support has two support rollers arranged in parallel with each other. The intermediate connecting jig can be placed on the intermediate support so that the columnar portions abut.

According to a third aspect of the present invention, in addition to the first or second aspect, the intermediate supporter can adjust the height of the two support rollers, and Accordingly, it is possible to mount intermediate connecting jigs having different diameters of the cylindrical portions in accordance with the conditions. The intermediate connecting jig can be easily replaced according to the size of the workpiece. Further, the height adjustment of the intermediate connecting jig is easy.

According to a fourth aspect of the present invention, there is provided (a) a pair of rotatable clamp jigs between which a workpiece is mounted, and (b) a drive mechanism for rotating one of the pair of clamp jigs. And (c) an intermediate connecting jig having a cylindrical portion and capable of connecting a workpiece to both ends thereof, and (d) being disposed between the pair of clamp jigs and enabling the intermediate connecting jig to rotate. (E) a slide mechanism capable of changing a distance between the pair of clamp jigs and a distance between the intermediate support and the pair of clamp jigs; It is characterized by comprising a welding device slidable in the direction of the rotation axis on two or more workpieces attached between a pair of clamp jigs. By connecting the workpieces to both ends of the intermediate connecting jig, an intermediate portion having the intermediate connecting jig can be supported by the intermediate support in addition to the double-sided support by the pair of clamp jigs. Therefore, compared to a two-sided support using only a pair of clamp jigs,
Can load twice as many workpieces. In addition, since it is sufficient to connect the pair of clamp jigs while being placed on the intermediate support table, the positions of both ends of the connected workpiece can be easily adjusted to the clamp jigs, and the mounting operation is easy. It is preferable that the driving-side clamp jig is fixed, and the slide mechanism is provided on the intermediate support base and the driven-side clamp jig. However, the present invention is not limited thereto. A slide mechanism may be provided in the clamp jig on the side.

According to a fifth aspect of the present invention, in addition to the fourth aspect of the invention, two or more of the intermediate connecting jig and the intermediate support are provided. Before the workpiece is connected to the clamp jig, the workpiece can be supported at two points, so that the work of attaching the workpiece to the clamp jig is further facilitated. In other words, after the work is suspended by the crane and placed on two or more intermediate supports, the connected work is completely separated from the crane and then attached to the clamp jig, thereby facilitating the mounting operation.

According to a sixth aspect of the present invention, in addition to the fourth or fifth aspect, the intermediate support has two support rollers arranged in parallel.
An intermediate connecting jig can be placed on an intermediate support table such that the cylindrical portion abuts on one support roller.

According to a seventh aspect of the present invention, in addition to the sixth aspect, the intermediate support base is capable of adjusting the height of the two support rollers, and the height of the two support rollers is adjusted according to the size of the workpiece. Thus, intermediate connecting jigs having different diameters of the cylindrical portions can be placed. The intermediate connecting jig can be easily replaced according to the size of the workpiece. Further, the height adjustment of the intermediate connecting jig is easy.

According to an eighth aspect of the present invention, in addition to the sixth or seventh aspect, a slide mechanism for sliding the two support rollers of the intermediate support base in a horizontal direction is provided. Absorbs the error of the center of rotation of the workpiece,
The workpiece can be reliably supported by preventing the intermediate connecting jig from contacting only one of the rollers. Examples of the slide mechanism include a rail that slidably supports a support frame that supports two support rollers, a cylinder that slides, and the like.

[0019]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of one embodiment of a connection welding apparatus according to the present invention, FIG. 2 is a perspective explanatory view showing a state in which a workpiece of the workpiece rotation support device of FIG. 1 is mounted, FIGS.
FIG. 5 is an explanatory view of the structure and operation of the intermediate support stand of FIG. 1, FIGS. 5 and 6 are explanatory views of another embodiment of the connection welding apparatus of the present invention, and FIG. 7 is a reinforced pillar core as an example of a workpiece. 8 and 9 are structural explanatory views of a connecting jig for connecting a workpiece.

Referring to FIG. 1, the connection welding apparatus of the present invention comprises:
It comprises a workpiece rotation support device 1 and a welding device 2.

The workpiece rotation support device 1 is capable of rotating a pair of clamp jigs 3 and 4, an intermediate connection jig 5, a rotation drive motor 6 for rotating the clamp jig 3, and the intermediate connection jig 5. , A bearing 8 that rotatably supports the clamp jig 4, and a slide mechanism (such as a rail 9) for sliding the intermediate support 7 and the bearing 8. Further, the welding device 2 includes a welding robot 10
And a moving device 11 for sliding the welding robot 10.

As shown in FIG. 2, the clamp jigs 3 and 4 are rectangular flat plates having the same shape and the same size as the flanges 51 at both ends of the workpiece W, and are shown in FIGS. The flange 51 can be attached via the connecting jig 60 to be connected. The clamp jigs 3 and 4 can be changed according to the size of the workpiece W.

As shown in FIG. 2, the intermediate connecting jig 5 has rectangular flat plates 5a, 5b having the same shape and the same size as the flanges 51 at both ends of the workpiece W provided at both ends of the cylindrical portion 5c. And the flat plate 5a according to the size of the workpiece W,
It is preferable that a plurality of cylinders 5b and the columnar part 5c having different diameters are prepared and exchangeable.

The two or more workpieces W are connected on both sides of the intermediate connecting jig 5 so as to be coaxial with each other. For example, in the case of connecting four pieces, as shown in FIG. 2, the two pieces are connected separately with an intermediate connecting jig 5 interposed therebetween. The intermediate connecting jig 5 is rotatably mounted on the intermediate support 7, and a clamp is used as compared with a conventional method in which four connected jigs are supported between the clamp jigs 3 and 4. The load and bending applied to the jigs 3 and 4 are extremely reduced.

The intermediate support 7 is, as shown in FIG.
Two support rollers 21 and 22 that are arranged side by side so that the rotation axes are parallel in a horizontal plane, an upper frame 23 that rotatably supports the support rollers 21 and 22, and a vertically movably supported upper frame 23. A lower frame 24, a vertical drive mechanism (not shown) provided between the upper frame 23 and the lower frame 24, and a slide handle 25. A conventionally used one such as a screw jack can be appropriately used as the vertical movement drive mechanism. The lower frame 24 is preferably slidably mounted on the rail 9, and the rail 9 is provided between two parallel support frames 12.

As shown by the two-dot chain line in FIG.
2 is placed so as to be in contact with 2. Also, the intermediate connecting jig 5
As shown in FIG. 2, a pair of clamp jigs 3, 4
The intermediate support 7 is moved up and down to adjust the vertical position. For example, as shown in FIG. 4, when placing an intermediate connecting jig 5 larger than the intermediate connecting jig 5 shown in FIG. The upper frame 23 is lowered so that its axis 26 coincides with the rotation center of the clamp jigs 3 and 4.

As shown in FIG. 5, the workpieces W may be connected with two or more intermediate connecting jigs 5 interposed therebetween.
In that case, the workpiece can be placed on the two or more intermediate supports 7, so that the workpiece can be completely separated from the crane during the loading operation, and the subsequent clamping jigs 3, 4
Installation to the device becomes easy. The two or more intermediate supports 7 are each slidable in the direction of the rotation axis, and can be adjusted according to the size of the workpiece.

Further, as shown in FIG. 6, the two support rollers 21 and 22 are preferably slidable in the horizontal direction. The slide mechanism includes a support frame 30 for supporting the support rollers 21 and 22, a rail 31 for slidably supporting the support frame 30, and a cylinder 32 for driving the support frame 30 to slide. When the rotation center of the intermediate connecting jig 5 is shifted from O1 to O2, the cylinder 32 is driven to slide the support rollers 21 and 22 to the position indicated by the two-dot chain line, and to the intermediate connecting jig 5 located at the position indicated by the two-dot chain line. The two support rollers 21 and 22 are brought into contact with each other.

Next, based on FIG. 7 to FIG.
A configuration of a reinforced pillar core, which is one example, and a connection jig and a connection method will be described.

The reinforced pillar core W is a rectangular column 5
0 and square plate-like diaphragms 5 provided at both ends thereof
The diaphragm 51 is larger than the square column 50 and connects the protruding four corners with a connecting jig 60. A backing metal 52 is temporarily welded to the diaphragm 51 so as to hit the entire inner periphery of both ends of the square column 50, and a welding portion Wa serving as a weld joint is welded by the welding robot 10 from the outside.

The connecting jig 60 includes a connecting pipe 61 formed in a cross shape along a diagonal line of the diaphragm 51 and a connecting pipe 61.
And clamps 62 provided at both ends. Connecting pipe 61
Is a thin-walled square pipe in which several holes 63 corresponding to the dimensions of the diaphragm 51 are provided in a penetrating manner.
3 and insert the round nut 64 into any one of the clamp bodies 6.
The position 5 is determined by fastening the cross bolt 66 from outside the connecting pipe. The diaphragm 51 of the workpiece W to be connected (or the clamp jig 3,
Claws 67 and 68 are provided for clamping both end surfaces 5a and 5b) of the intermediate connecting jig 5 or 4 and clamp the diaphragm 51 with bolts. By using the connecting jig 60 configured as described above, the workpieces are connected so that their axes are aligned. Further, in the connecting jig 60, the thermal expansion due to welding of the workpiece W can be absorbed by the flat spring 69 inserted into the cross bolt 66.

[0032]

As described above, in the method and the apparatus according to the first and fourth aspects, the work piece is connected to both ends of the intermediate connecting jig, so that, in addition to the two-sided support by the pair of clamp jigs, An intermediate portion of the intermediate connecting jig can be supported by the intermediate support. Therefore, it is possible to mount twice as many workpieces as those supported on both sides by only a pair of clamp jigs. In addition, since it is sufficient to connect the pair of clamp jigs while being placed on the intermediate support table, the positions of both ends of the connected workpiece can be easily adjusted to the clamp jigs, and the mounting operation is easy.

According to the fifth aspect of the present invention, two or more of the intermediate connecting jig and the intermediate support are provided, and the connected workpieces are connected at two places before connecting to the clamp jig. Since it can be supported by the clamp jig, the work of attaching to the clamp jig is further facilitated. In other words, after the work is suspended by the crane and placed on two or more intermediate supports, the connected work is completely separated from the crane and then attached to the clamp jig, thereby facilitating the mounting operation.

In the method and the apparatus according to the second, third, sixth and seventh aspects, the height of the two support rollers on which the intermediate connecting jig is placed can be adjusted, and the size of the workpiece can be reduced. Even if the intermediate connecting jig is replaced, the axis of the jig can be easily adjusted to the rotation center of the clamp jig.

According to the present invention, the two rollers of the intermediate support stand are slidable in the horizontal direction, absorb the error of the center of rotation of the workpiece, and fix the intermediate connecting jig to only one of the rollers. Can be prevented from contacting with each other, so that the workpiece can be reliably supported.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of a connection welding apparatus according to the present invention.

FIG. 2 is a perspective explanatory view showing a state in which a workpiece of the workpiece rotation support device of FIG. 1 is mounted.

FIG. 3 is an explanatory view of a structure and an operation of the intermediate support of FIG. 1;

FIG. 4 is an explanatory view of the structure and operation of the intermediate support of FIG. 1;

FIG. 5 is an explanatory view of another embodiment of the connection welding apparatus of the present invention.

FIG. 6 is an explanatory view of still another embodiment of the connection welding apparatus of the present invention.

FIG. 7 is an explanatory diagram of a reinforced pillar core as an example of a workpiece.

FIG. 8 is a structural explanatory view of a connecting jig for connecting workpieces.

FIG. 9 is a structural explanatory view of a connecting jig for connecting workpieces.

FIG. 10 is an explanatory perspective view of a workpiece connected by a conventional connection method.

FIG. 11 is a perspective explanatory view of a conventional workpiece rotation support device.

FIG. 12 is a plan view of a conventional automatic welding device.

[Explanation of symbols]

 W Workpiece 3, 4 Clamp jig 5 Intermediate connection jig 5c Cylindrical part 7 Intermediate support base 21, 22 Support roller

Claims (8)

[Claims] An intermediate connection jig having a cylindrical portion is interposed between two or more workpieces, and the cylindrical workpiece is rotatably mounted on an intermediate support while the workpieces are connected to each other. A connection welding method comprising: mounting both ends between a pair of rotatable clamp jigs; and welding while rotating the two or more workpieces. 2. The method according to claim 1, wherein the intermediate support is arranged in parallel with each other.
The connection welding method according to claim 1, further comprising: two support rollers, wherein an intermediate connection jig can be placed on an intermediate support table so that the cylindrical portion abuts on the two support rollers. 3. The intermediate support base is capable of adjusting the height of the two support rollers, and is capable of mounting an intermediate connecting jig having a different diameter of the cylindrical portion according to the size of the workpiece. The connection welding method according to claim 1 or 2, wherein 4. A pair of rotatable clamp jigs between which a workpiece is mounted, and (b) a drive mechanism for rotating one of the pair of clamp jigs.
(C) an intermediate connecting jig having a cylindrical portion and capable of connecting a workpiece to both ends thereof; and (d) rotatably mounting the intermediate connecting jig disposed between the pair of clamp jigs. (G) a slide mechanism capable of changing a distance between the pair of clamp jigs and a distance between the intermediate support and the pair of clamp jigs; A connection welding device comprising a welding device slidable in a rotation axis direction on two or more workpieces attached between clamp jigs. 5. The connection welding apparatus according to claim 4, further comprising at least two of said intermediate connection jig and said intermediate support base. 6. The apparatus according to claim 6, wherein the intermediate support is arranged in parallel with each other.
6. The connection welding apparatus according to claim 4, wherein the connection welding device has two support rollers, and an intermediate connection jig can be placed on an intermediate support table so that the cylindrical portion abuts on the two support rollers. . 7. The intermediate support table is capable of adjusting the height of the two support rollers, and is capable of mounting an intermediate connecting jig having a different diameter of the cylindrical portion according to the size of the workpiece. 7. The connection welding apparatus according to claim 6, wherein: 8. The connection welding apparatus according to claim 6, further comprising a slide mechanism that slides two support rollers of the intermediate support base in a horizontal direction.