JP2003025067A - Multi-spindle control welding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-spindle control welding equipment in which a motor is not degraded by the arc. SOLUTION: In the multi-spindle control welding equipment to draw a welding locus on the welding line, a drive motor to operate each spindle is mounted on a component at a location sufficiently separated for preventing degradation by the radiation heat from a welding arc generation part, and a torch part and a drive spindle in the vicinity thereof are driven from the component via a power transmission mechanism. Since a liner bearing 17 is disposed on a parallel arm 11 with the parallel arm 11 as a guide, the parallel arm 11 slides in the direction of an arrow V by the drive of an AVC spindle motor 8 mounted on the parallel arm 11. A torch supporting rod 10 extending from a tip of the parallel arm 11 is moved by the movement of the parallel arm 11 to operate a torch 2. The torch 2 is rotated by the motor 7 via a chain 14, and a wire 3 can be circulated around the torch 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-axis control welding apparatus, and more particularly to a multi-axis control welding apparatus which prevents thermal deterioration of a motor for driving each axis.

[0002]

2. Description of the Related Art Generally, a multi-axis control welding apparatus is equipped with a large number of axes for driving a torch and a wire so that a complicated welding line can be drawn. FIG. 3 (FIG. 3A is a side view,
3 (b) is a partially enlarged view of the torch portion viewed from the direction of arrow B of FIG. 3 (a)), in which a stub 4 is automatically TIG welded to an inclined steel plate 5 using a multi-axis control welding device. Shows.

In the multi-axis control welding apparatus, a V-axis for vertically moving an arm 9 inserted in the stub 4, a C-axis for rotating the arm 9 in the central axis direction, and an arm 9 are also provided.
R axis for moving the torch 2 in the radial direction, K axis for inclining the torch 2 in the arrow K direction by the rod 10, and AVC axis for moving the arc length in the arrow V direction are required. The rod 10 is attached to the tip ends of the parallel links 11 and 11, and has a configuration in which the K-axis motor 12 provided at the base of the parallel links 11 and 11 translates the parallel links in the arrow K direction.

Further, the multi-axis control welding apparatus is provided with a W shaft 13 which rotates in the direction of arrow A in order to change the position at which the wire 3 is inserted into the torch 2 via the wire nozzle 6. In this way, it is possible to automatically weld the vertical cylindrical stub 4 to the inclined steel plate 5 using a total of 6 axes (see: Welding Society Kansai Branch Technical Session "Challenges for new technologies for welded structures"). H7.11.2
7 issued).

As shown in FIG. 3, the stub 4 is an inclined steel plate 5
In the case where a large number of them are arranged adjacent to each other, a torch structure as shown in FIG. 4 has been conventionally used in order to realize the multi-axis structure of the multi-axis control welding device.

FIG. 4 is an enlarged view of the torch portion of the multi-axis control welding apparatus shown in FIG. 3, in which a W shaft 13 is provided at the base of the torch 2 coaxially with the torch 2, and the diameter of the W shaft 13 is large. The wire nozzle 6 is connected to the tip of the arm 18 extending in the direction,
By rotating the shaft 13 in the direction of arrow A, the torch 2 is brought closer to the welding region of the connecting portion between the stub 4 and the inclined steel plate 5, and the wire 3
Can be supplied.

The W shaft 13 is mounted on the torch base 2 via a bearing 21.
2 is rotatably supported, but the torch base 22 is provided with a W-axis motor 7 for rotating the W-axis 13.
The W-axis motor 7 is a gear 2 provided on the motor rotating shaft 7a.
3 meshes with a gear 24 provided on the W shaft 13 so that W
The shaft 13 is rotated.

Further, an AVC shaft feed screw 26 is provided on the torch base 22, and the AVC shaft feed screw 26 is A
It has an integral structure with the VC shaft 27, and the AVC shaft 27 is a bearing 2
It is supported by the AVC substrate 30 via 8. The AVC
The AVC shaft motor 8 and the guide shaft 31 are fixed to the base body 30. The guide shaft 31 is the torch base 22.
The gear 33 provided on the motor rotating shaft 8a of the AVC shaft motor 8 has a structure that can be inserted and removed from the inside of the AVC shaft 27.
By engaging with the gear 34 provided on the AVC shaft 27
To rotate. When the AVC shaft feed screw 26 is actuated by the rotation of the AVC shaft 27 and slides the AVC shaft 27 in the direction of arrow V, the guide shaft 31 for stabilizing the sliding of the AVC shaft 27 simultaneously moves in the direction of arrow V. Move.

[0009]

When a large number of stubs 4 are arranged adjacent to the inclined steel plate 5, the space in which the multi-axis control welding device can be installed is small, so that a combination of small motors is shown in FIG. It was considered that the structure of the torch part was optimal.

However, in the structure shown in FIG. 4, the position where the arc is generated during welding is close to the motor installation position, and the temperature of the motor installation part rises to about 100 ° C. due to the radiant heat of the arc light, and the life of the motors 7 and 8 is increased. It was significantly lowered, and it was necessary to replace the motors 7 and 8 after several weeks of operation. For this reason, the operating rate of the welding apparatus itself has decreased, which has been an obstacle to improving the productivity of the welded product.

An object of the present invention is to provide a multi-axis control welding device in which a motor is not deteriorated by an arc.

[0012]

SUMMARY OF THE INVENTION In the multi-axis control welding apparatus for drawing a welding locus on a welding line, the above-described object of the present invention is to deteriorate a drive motor for operating each axis due to radiation heat from a welding arc. Is a multi-axis control welding apparatus having a shaft configuration in which the torch unit and a drive system in the vicinity thereof are driven from the component member via a power transmission mechanism by being attached to the component member at a position sufficiently distant from each other.

For example, when welding a stub or the like to an inclined plate such as an RCD stub, a complicated welding locus may be drawn. In such a case, a shaft driving motor for operating each shaft is driven from a welding arc. Position far enough to prevent deterioration due to radiant heat of the
It is placed at a site separated by 00 mm or more.

By disposing the shaft driving motor at a position distant from the arc generating portion in this way, heat deterioration of the motor can be prevented, and the constituent members of the welding device near the arc generating portion have a heat resistant temperature of about 100 ° C. or more. Can be used.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a stub 4 on a steel plate 5 inclined by using a multi-axis control welding apparatus according to an embodiment of the present invention.
The side view of the principal part in the case of automatic TIG welding is shown. The multi-axis control welding device includes a V-axis that vertically moves an arm 9 inserted inside the stub 4, a C-axis that similarly rotates the arm 9 around its central axis, and an R-axis that radially moves the arm 9. A K axis for inclining the torch 2 in the arrow K direction by the rod 10 and an AVC axis for controlling the arc length are required. The rod 10 is attached to the front ends of the parallel links 11, 11 and has a configuration in which the AVC shaft motor 8 provided at the base of the parallel links 11, 11 translates the AVC shaft in the arrow V direction. is there. Moreover, the parallel link 11 is translated by the K-axis motor 12 provided at the base of the parallel link 11 in the arrow K direction.

Further, a W-axis motor 7 is provided on the rod 10 in order to change the position of inserting the wire 3 into the torch 2 via the wire nozzle 6. In this way, the cylindrical stub 4 oriented in the vertical direction is automatically welded to the inclined steel plate 5 using a total of six axes.

As shown in FIG. 1, the stub 4 is an inclined steel plate 5
FIG. 2 shows the structure of the torch part which realizes the multi-axis structure of the multi-axis control welding device when it is arranged adjacent to, and prevents the motor from being thermally deteriorated at the arc generating part. The linear bearing 1 using the two parallel arms 11 of FIG. 1 as a guide
The AVC axis motor 8 attached to the parallel arm 11 since the reference numerals 7 and 17 are arranged on the parallel arms 11 and 11.
The parallel arms 11, 11 are slid in the direction of arrow V by the driving of. This movement of the parallel arms 11, 11 moves the torch supporting rod 10 extending from the tips of the parallel arms 11, 11 to operate the torch 2.

The W-axis motor 7 is mounted on the rod 10, and as shown in FIG. 2 which is a side view seen from the direction of arrow A in FIG.
Is transmitted to the bevel gear 15 via the chain 14 arranged along the rod 10, and drives the W shaft 13 via the bevel gear 16 for driving the W shaft 13 to drive the torch 2 coaxial with the W shaft 13. It can be rotated. The torch 2
The wire nozzle 6 is connected to the tip of the arm 18 extending in the radial direction so that the wire 3 can be supplied to the welding area by rotating the torch 2 in the direction of arrow R.

According to this embodiment, the motors 7 and 8 can be separated from the arc generating portion, so that the motors 7 and 8 can be separated from each other.
There is no temperature rise and its life can be extended. Further, since the chain 14 and the gears 15 and 16 are also used as parts for transmitting power, they can be used without trouble even if the temperature rises to about 100 ° C. As a result, the failure of the welding device is reduced, the operating rate is improved, and the productivity is increased.

[0020]

According to the present invention, since each motor for multi-axis drive can be separated from the arc generating portion, the motor can have a long life without temperature rise and the parts for transmitting power have high heat resistance. Since it can be composed of only the members, the failure of the welding device is reduced, the operation rate is improved, and the productivity of the welded product is increased.

[Brief description of drawings]

FIG. 1 is a side view of a main part when a stub is automatically TIG welded to a tilted steel plate using a multi-axis control welding device according to an embodiment of the present invention.

FIG. 2 is an operation explanatory view of the W-axis of the multi-axis control welding apparatus of FIG. 1 (a view seen from an arrow A direction of FIG. 1).

FIG. 3 is a side view of a main part (FIG. 3 (a)) in the case of automatically TIG welding a stub to a tilted steel plate using a conventional multi-axis control welding apparatus and seen from the direction of arrow B in FIG. 3 (a). It is a partially expanded view of a torch part (FIG.3 (b)).

FIG. 4 is a detailed view of the torch portion of FIG.

[Explanation of symbols]

2 torch 3 wire 4 stub 5 inclined steel plate 6 wire nozzle 7 W-axis motor 7a motor rotating shaft 8 AVC motor 8a motor rotating shaft 9 arm 10 rod 11 parallel link 12 K-axis motor 13 W-axis 14 chain 15, 16 bevel gear 17 linear bearing 18 arm 21 bearing 22 torch base 23, 24 gear 26 AVC shaft feed screw 27 AVC shaft 28 bearing 30 AVC base 31 guide shaft 33, 34 gear

Claims (2)

[Claims] 1. A multi-axis control welding apparatus for drawing a welding locus on a welding line, wherein a driving motor for operating each axis is located at a position sufficiently separated to prevent deterioration due to radiant heat from a welding arc. A multi-axis control welding device having a shaft configuration which is attached to a member and drives a torch unit and a drive system in the vicinity thereof from the component member via a power transmission mechanism. 2. The multi-axis control welding apparatus according to claim 1, wherein the drive motor for the torch portion is arranged at a distance of 100 mm or more from the arc generating portion.