JPS5853378A - Automatic stud welding device - Google Patents

Abstract

PURPOSE:To elevate a quality of stud welding and also its work efficiency, by turning a welding gun fitting arm so as to make a stud dowel perpendicular to the surface of a member to be welded through a welding gun, and after that, holding it and executing the welding. CONSTITUTION:By an air cylinder 14, an auxiliary material clamp-fitting arm 16 is rotated clockwise by about 90 degrees from a welding position 27, is stopped at a stock position 25 of the auxiliary material 7, and the auxiliary material 7 is clamped through an air cylinder 21 and clamping metallic fittings 12. Also, a welding gun fitting arm 15 is turned by about 60 degrees to a stock position 24 of a stud dowel 10 from the position 27 in the same way, and the dowel 10 is clamped by a welding gun 11. Subsequently, the gun 11 is returned to the position 27, and after that, the arm 16 is turned, and the auxiliary material 7 is fixed to the welding position of the dowel 10 of a member be welded 6. After that, the dowel is set so as to make it perpendicular to the surface of the member 7, and is welded by the gun 11.

Description

[Detailed description of the invention] The present invention relates to an automatic stud welding device.

Normally, when a stud dowel with a diameter of several diameters or more is stud-welded onto a welded member, an auxiliary shield material is often used to prevent oxidation of the welded part and maintain the shape of the weld bead. Additionally, one auxiliary material is used for each stud dowel during welding. In the conventional welding method, welding was carried out by holding the welding gun in the hand and holding the stud dowel at the full angle perpendicular to the surface of the workpiece, but the work was difficult because the angle was unstable. It is not easy, therefore, the angle becomes uneven and the quality varies,
In addition, the stud dowel and auxiliary material were manually supplied and inserted into the welding gun, resulting in inefficiency.

The present invention was made in view of the above situation, and an object of the present invention is to provide an automatic stud welding device that can weld a stud dowel perpendicularly to the surface of a workpiece to be welded, thereby improving quality and work efficiency. be.

The automatic stud welding device of the present invention is formed to perform welding using an auxiliary material, and is attached to a center column that is erected on a frame, and is rotatably and vertically displaceable to the center column. a welding gun mounting arm that transports the stud dowel from the stock position to the welding position via the welding gun and holds the stud dowel at right angles to the surface of the workpiece to be welded via the welding gun; and a welding gun mounting arm that is rotatable to the center column. and an arm for attaching an auxiliary material clamp, which is attached so as to be vertically displaceable and grips the auxiliary material from a stock position via a clamping metal fitting, and transports the auxiliary material to a position covering the surface of the stud dowel welding part of the second stud dowel of the workpiece to be welded. , and means for automatically controlling each of the above operations.

An embodiment of the automatic stud welding device of the present invention will be described below.
This will be explained with reference to FIGS. Fig. 1 is a perspective view of the welding state of the welding device, Fig. 2 is a plan view for explaining the rotation of the arm in Fig. 1, Fig. 3 is an explanatory diagram of the welding sequence in the case of welding multiple stud dowels, and Fig. 4 The figure is a detailed view of the welded area after stud dowel welding. In FIGS. 1 and 2, 1 is a motor for adjusting the height of the welding gun mounting arm 15, 2 is a motor for height adjustment of the auxiliary material clamp mounting arm 16, and 3 is for supporting the welding machine frame 17. An air cylinder 5 is used to move the movable base 4, and 5 is a positioning stopper that is retractably attached to the roller conveyor 9. Reference numeral 6 indicates a member to be welded placed on a roller conveyor 9, 7 indicates an auxiliary material made of rolled material in the shape of a ridge tile, and 8 indicates an auxiliary material 7 attached to an air cylinder 21 which has the auxiliary material 7 fixed at the bottom with an air cylinder for a flang. A clamp fitting 12 is provided to removably grip the. Reference numeral 18 denotes a welding machine frame, which is provided at a position facing the welding machine frame 17 with the roller 9 and the workpiece to be welded 6 sandwiched between the welding machine frame 17 and to which various devices (not shown) that are exactly the same as the welding machine frame are attached. ing.

A stud dowel 10 is welded to the welded member 6 and is stored at a stock position 24. Reference numeral 19 denotes an air cylinder for pushing up the stud dowel 10. When the welding gun 11 is guided by the welding gun mounting arm 15 and rotated to the stock position 24, it pushes up the stud dowel 10 from below. It is designed to be held by the user. 22 is a center column fixed on the welding machine frame 17, and rotatably supports the welding gun mounting arm 15 on the upper part, and the welding gun mounting arm 15 is at the welding position 27 and the stock position shown in FIG. 24 by the air cylinder 13. When the stud dowel 10 is held at the welding position 27 by the welding gun mounting arm 15 via the welding gun 11, the stud dowel 10 is held perpendicular to the upper surface of the workpiece 6 and welded. ing. Further, an arm 16 for attaching an auxiliary material clamp is rotatably supported at the lower part of the center column 22, and the arm 16 for attaching the auxiliary material clamp is connected to the air cylinder 14 between the welding position 27 and the stock position 25 of the auxiliary material 7. It is designed to be rotatably driven. 2
3 is a welding machine main body supported by a welding gun mounting arm 15.

In addition, the operation of each part is automatically controlled by a control device (
(not shown), and a plurality of sizes of the welded member 6 are stored in the storage device of the control device.

In the above structure, when the size of the workpiece 6 to be welded to the stud dowel 1o is indicated by a push button on the control device, the positioning trapper 5 and the air cylinder 3 for moving the movable base 4 are driven accordingly. , the positioning stopper 5 is provided protrudingly at a predetermined position. Further, the air cylinder 3 moves the movable base 4 to a predetermined dimensional position according to the width of the welded member 60. Plate thickness (height) of welded member 6
Accordingly, the height of the auxiliary material 7 is adjusted and positioned by the motor 2, and at the same time, the height of the welding gun 11 is also adjusted by the motor 1. Then, when the workpiece 6 to be welded is placed on the roller conveyor 9, the roller conveyor 9 is moved according to the current command from the control device.
The roller rotates, and the workpiece 6 to be welded is conveyed and stopped by the set positioning stopper 5. Next, the arm 16 for attaching the auxiliary material clamp is rotated 90 degrees clockwise from the welding position 27 in FIG. 1 by being driven by the air cylinder 14 shown in FIG. 21. Clamp the auxiliary material 7 via the clamp fitting 12. Similarly, the welding gun mounting arm 15 is driven by the air cylinder 13 from the welding position 27 in FIG. 1
Stud dowel 1 (li contact gun 1) pushed up by 9
Clamp it to 1.

Next, the welding gun 11 holding the stud dowel 10 is returned to the welding position 27 via the air cylinder 13 again. After that, the air cylinder 14 is operated to rotate the arm 16 for attaching the auxiliary material clamp, and the stud dowel 10 is attached to the upper surface of the workpiece 6 at the lower part of the welding gun attaching arm 15 at the welding position 27 in FIG. Fix the auxiliary @7 at the welding position. This auxiliary member 7 is formed into an annular shape as shown in FIG. 4, and the lower end of the stud dowel 10 is inserted into this hole and welded. Note that 20 indicated by dotted diagonal lines in FIG. 4 is a welded part of the stud dowel 10 and the welded member 6, and the 42 part of the stud dowel 10 has the same diameter up to the lower end before welding and is an auxiliary part. It can be fitted into the material 7. Then, as described above, the lower end of the stud dowel 10 is inserted into the inside of the auxiliary material 7, and electricity is applied through the welding machine main body 23 and the welding gun 11 to weld. When welding is completed, the auxiliary material 7 is unclamped by the clamp fitting 12 via the air cylinder 21, and at the same time the stud dowel 10 is unclamped by the welding gun 11, and the welding gun 11 is raised.

Next, when a delivery instruction is given, the positioning stopper 5 is lowered into the roller conveyor 9 and the workpiece 6 to be welded is conveyed to the next position by starting the roller. In addition, when welding a plurality of stud dowels to the member to be welded 6, welding can be performed continuously by inputting information to the control device for the plurality of stud dowels. In this case, the welding apparatus having the welding machine frame 17 shown in FIG. 1 welds the stud dowel at position a in FIG. 3, and then moves the movable base 4 to weld the stud dowel at position b. Next, the stud dowel at position C is welded using a welding device (not shown) having a welding machine frame 18. After this, the positioning stopper 5 is lowered and the roller 9 is driven to move 9 dimensions and position it. Then, the stud dowels at positions d and e are welded by a welding device having a welding machine frame 17, and then the welding machine frame 18 The stud dowel at the Jf position is welded by a welding device having the following.

In this way, the automatic stud welding device of this embodiment rotates the welding gun mounting arm so that the stud dowel is perpendicular to the surface of the workpiece, and then holds it and welds.
It is possible to always weld at right angles, and the work is extremely easy without causing quality variations unlike conventional methods. Furthermore, since the stud dowel and auxiliary material are automatically attached to the welding position, the work is easy without the hassle of conventional manual work, improving work efficiency and reducing work man-hours.

As described above, the automatic stud welding apparatus of the present invention can weld a stud dowel perpendicularly to the surface of a workpiece to be welded, and has the effect of improving quality, improving work efficiency, and reducing man-hours.

[Brief explanation of the drawing]

(9) Fig. 1 is a perspective view of the welding state of an embodiment of the automatic stud welding device of the present invention, Fig. 2 is a plan view for explaining the rotation of each arm in Fig. 1, and Fig. 3 is the device shown in Fig. 1. FIG. 4 is a detailed sectional view of a welded part after stud dowel welding using the apparatus shown in FIG. 1. 6... Part to be welded, 7... Auxiliary material, 1o... Stud dowel, 11... Welding gun, 12... Clamp fitting, 15... Welding gun mounting arm, 16...・
Arm for attaching auxiliary material clamp, 17. ...18... Welding machine frame, 22... Center column, 24.25...
・Stock position, 27...Welding position. Agent Patent Attorney Akio Takahashi (10) Figure 82 Kuzu 3 (21J Figure 4)

Claims (1)

[Claims] 1. In a stud welding device that welds using auxiliary materials, there is a center column installed in the frame, which is rotatably attached to the center column and movable up and down. a welding gun mounting arm that transports the dowel to the welding position and holds the stud dowel at right angles to the surface of the workpiece to be welded via the welding gun; An arm for attaching an auxiliary material clamp that grips the auxiliary material from the attached stock position via the clamp fitting and transports it to a position covering the surface of the stud dowel welding part on the workpiece to be welded, and automatically controls each of the above operations. An automatic stud welding device characterized by being provided with means.