JPH0428701Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a welding device, and is mainly for forming a mesh-like fence in which a large number of fence materials are erected and arranged horizontally. A plurality of electrodes constituting an electrode array can be easily positioned at respective welding positions.

(Prior art) Conventionally, a method in which a plurality of upper electrodes are moved to each welding position by a screw is described in Patent No. 72451, and a method in which the screw for moving the upper electrodes is rotated by a motor is described. 1986-
It is described in Publication No. 143773.

(Problems to be Solved by the Invention) In the conventional example, the welding interval in the vertical direction can be adjusted by driving the respective ball screws of the electrodes.

Therefore, each robot must move each electrode in the lateral direction, which is expensive and complicated.

Furthermore, it was not possible to finely and delicately align and fix each electrode in the lateral direction.

(Means for solving the problem) The welding device of the present invention is a welding device that sequentially welds a plurality of joint points of a workpiece row by row using a plurality of welding electrodes arranged in a row, and the workpiece is sandwiched from above and below. A ball screw in which an upper welding electrode row and a lower welding electrode row are arranged facing each other across the upper and lower welding electrode rows, and each of the plurality of upper electrodes constituting one of the upper and lower welding electrode rows is rotated by a motor. One row of welding electrodes is established by moving the electrodes to each welding position and fixing the electrodes that have reached this welding position one after another.
These multiple moving frames are horizontally movable and engaged side by side with a frame, a ball screw, and a guide bar arranged in parallel at one location, and each moving frame is is equipped with a clutch mechanism that engages with the ball screw and a brake mechanism that engages with the guide bar.The clutch mechanism of the moving frame to be moved is activated to transmit the drive of the ball screw, and the moving frame is welded. When the position is reached, the clutch mechanism is released and the brake mechanism is activated so that the brake can be fixed to the guide bar, and each movable frame is moved and fixed to an arbitrary position.

(Function) Each of the multiple electrodes is moved by a ball screw rotated by a motor to the welding position corresponding to the welding point of the workpiece to be formed (if the workpiece is a mesh fence, the intersection of fence materials) By sequentially fixing the electrodes that have reached this welding position, one of the upper and lower welding electrode rows is set. In addition, when forming a workpiece of a different shape, this fixation is released, each electrode is moved to the welding position again by a ball screw rotated by a motor, and the electrodes that have reached this welding position are fixed one after another. By setting one welding electrode row.

(Embodiment) The drawing shows an embodiment of the welding device of the present invention.

A case where the workpiece to be formed is a mesh fence will be explained. Of course, the welding apparatus of the present invention can also be applied to the case of sequentially welding two flat plates at a plurality of locations in a row.

A mesh-like fence is formed by sequentially welding a plurality of intersection points 3 (hereinafter referred to as welding positions) of a work 1 (hereinafter referred to as welding positions) row by row with a large number of fence materials 2 . . . erected and arranged horizontally. .

The welding device has an X-axis table (a table that moves in the vertical direction) 5 and a Y-axis table on which a workpiece 1 is placed on a machine stand 4.
An axis table (a table that moves in the horizontal direction) 6 is arranged, and a workpiece 1 placed on the Y-axis table 6 is placed at approximately the center of the machine table 4 in the vertical direction, and is placed across the workpiece 1 from above and below. A welding electrode row 7 and a lower welding electrode row 8 are arranged facing each other.

Reference numeral 9 in the figure is a motor (AC servo motor) for moving the X-axis table 5, and 10 is a motor (AC servo motor) for moving the Y-axis table 6.

The electrodes may be moved to the welding position by the upper electrodes 71 . . . forming the upper welding electrode row 7 or the lower electrodes 81 . . . forming the lower welding electrode row 8. However, a case will be explained in which the upper electrode 71 that constitutes one of the upper and lower welding electrode rows 7 and 8 (upper welding electrode row 7) can be moved and fixed freely in the lateral direction. do.

A plurality of (approximately 10 to 30) upper electrodes 71 constituting the upper welding electrode row 7 are connected to a support 11 that is erected across the machine base 4 at approximately the center of the machine base 4 in the vertical direction. , 11, a frame 12, a ball screw 13, and a guide bar 1 are horizontally suspended in parallel at one place on top of 11.
4 in the horizontal direction. Although the frame 12 and the guide bar 14 are fixed, the ball screw 13 is rotated by a pitch changing motor (AC servo motor) 15 of the upper electrode 71 .

The plurality of upper electrodes 71... are two upper electrodes 7.
1 and 71 are attached to one movable frame 16 as a set and are moved. Therefore, the moving frame 16
There are also several. These moving frames 1
6... is the frame 12 and ball screw 13 described above.
and the guide bar 14 so as to be movable laterally.

The movable frame body 16 is composed of a base plate 161, a frame plate 162 erected at one end of the base plate 161, and a transformer mounting bracket 163 erected at the other end.
That is, the base plate 161, the frame plate 162, and the transformer mounting bracket 163 are combined into a U-shape with a substantially upward cross section, and the movable frame body 16 is assembled so as to surround the frame 12.
is provided.

Each frame plate 162 is provided with a ball screw 1 to move or fix the movable frame body 16 laterally.
3 and the clutch mechanism 17 engaged with the guide bar 1
A brake mechanism 18 is provided which is engaged with 4. The arrangement of the clutch mechanism 17 and the brake mechanism 18 is not limited, and they may be upside down.

Clutch mechanism 17 engaged with ball screw 13
is a receiving screw 171 screwed into the ball screw 13.
A disc plate 17 is provided on the outer periphery of the receiving screw 171.
2 is installed. By grasping this disk disk 172, the screw drive of the ball screw 13 is transmitted to the movable frame 16 to move it, and when the movable frame 16 is fixed, the disk disk 172
By releasing , the screw drive of the ball screw 13 is prevented from being transmitted to the movable frame 16. Two arm members 1 hold the disk board 172.
73,173. Pivot 17 in the middle
Two arm members 173, 173 having a diameter of 4,174 are arranged so as to grip the disk board 172 at their tips. An operating body 176 having a tapered surface is inserted between the rear ends of the two arm members 173, 173, and the operating body 176 is moved forward and backward by the cylinder 175. When the operating body 176 is moved forward, the arm member 173,
The rear ends of the disc 173 are gradually opened wide, and the front ends are narrowed to grip the disc 172. Conversely, when the operating body 176 is retracted, this grip is released. 177,1
Reference numeral 77 denotes a roller provided at the rear end of the arm members 173, 173, which allows the operating body 176 to move forward and backward smoothly. Also, 178, 17
8 is a grip pad provided at the tip of the arm members 173, 173.

Next, the brake mechanism 18 engaged with the guide bar 14 will be explained.

Two arm members 1 whose middle parts are pivoted 182, 182
81 and 181 are disposed so as to grip the guide bar 14 at their tips. Two arm pieces 181, 181
An operating body 183 having a tapered surface is inserted between the rear ends, and the operating body 183 is controlled by the cylinder 184.
move forward and backward. When the operating body 183 is moved forward, the rear ends of the arm members 181, 181 are gradually opened widely, and the brake is applied (fixed) by gripping the guide bar 14 between the tips. 185,185 is arm material 18
The brake pads 185, 185 are provided at the tip of the arm member 1.
Rotating body 1 rotatably provided at the tip of 81, 181
86,186. In addition, 187
188 is a spring for releasing the brake, and 188 is a spring for maintaining the posture of the rotating bodies 186, 186. Also, 189, 189 is arm material 181, 181
This is a roller installed at the rear end of the

On the other hand, the transformer 19 is attached to the transformer mounting bracket 163. Note that if a roller 164 is provided at the upper end of the transformer mounting bracket 163 and a rail 165 that engages with this roller is provided on the side of the frame 12, the relationship between the frame 12 and the movable frame 16 can be made more stable. Become.
Further, 166 is a roller interposed between the frame 12 and the base plate 161, and the engagement between the frame 12 and the movable frame 16 is not limited to the above-mentioned one.

The lower welding electrode row 8 consists of a plurality of lower electrodes 81..., and 82 is a back bar. Lower welding electrode row 8
is provided on a lifting table 83, and this lifting table 83 is moved up and down by cylinders 84, 84, 84. 8
5 and 85 are guides for the lifting platform 83.

Note that the upper welding electrode row 7 is fixed by a back bar, and each lower electrode 81 constituting the lower welding electrode row 8...
... may be made to be able to be freely moved and fixed in the lateral direction by a ball screw rotated by a motor.

Further, although not shown, each of the electrodes 71 and 81 constituting the upper and lower welding electrode rows 7 and 8 may be able to be moved and fixed freely in the lateral direction.

Hereinafter, a method for forming a mesh fence using the welding apparatus of the present invention will be described.

First, a plurality of movable frames 1 arranged in a row in the horizontal direction
The movable frame 16 located at the end of the movable frames 16 is fixed at a predetermined position, and the intervals between the upper electrodes 71 are sequentially set to the welding positions using the movable frame 16 as a reference.

The clutch mechanism 17 of the moving frame 16 to be moved is activated to transmit the screw drive of the ball screw 13. When the movable frame 16 reaches the welding position, the brake mechanism 18 is activated to fix the brake to the guide bar 14. After that, the clutch mechanism 17 is released and the ball screw 13 is driven by the moving frame 1.
Please do not let this happen to 6.

The upper welding electrode array 7 is constructed by sequentially moving the movable frame 16 and fixing it at the welding position in the same manner.

After this, the fence material 2 is placed on the Y-axis table 6...
Stand up, place horizontally, combine work 1, and
The X-axis table 5 on which the axis table 6 is mounted is sequentially advanced in the vertical direction to reach multiple intersection points 3 of the workpiece 1...
A mesh-like fence is formed by welding each row of...

When forming a mesh fence of a different shape, the above-mentioned fixing is released, and the frame body 1 is moved again by the ball screw 13 rotated by the pitch changing motor 15.
6 and this moving frame 1 has reached the welding position.
The upper welding electrode row 7 is set by fixing the electrodes 6 in sequence.

As mentioned above, the workpiece formed by the welding apparatus of the present invention is not limited to such a mesh fence.

(Effect of the invention) In the welding device according to the invention configured as described above, two upper electrodes are attached as a set to one movable frame, and the plurality of movable frames are attached to one place. A frame arranged in parallel, a ball screw, and a guide bar are engaged side by side so as to be movable in the lateral direction, and each moving frame has a clutch mechanism engaged with the ball screw and a brake mechanism engaged with the guide bar. The clutch mechanism of the movable frame to be moved is activated to transmit the drive of the ball screw, and when the movable frame reaches the welding position, the clutch mechanism is released and the brake mechanism is activated to guide the movement. The brake can be fixed to the bar, and each movable frame can be moved and fixed to any desired position, so the clutch and brake provided on each movable frame can be controlled by driving a single ball screw. By switching, the movable frame can be independently moved and fixed in the lateral direction.

Therefore, the device can be made smaller and the position of each electrode can be finely adjusted.

Therefore, it is an excellent welding device for things like fences, where the distance between the vertical and horizontal members is varied and there are many welding points.

[Brief explanation of drawings]

The drawings show an example of the welding device of the present invention.
Fig. 1 is a side view, Fig. 2 is a plan view, Fig. 3 is a front view, Fig. 4 is an enlarged longitudinal sectional view of the main parts of the moving frame showing the clutch mechanism and brake mechanism, and Fig. 5 is the clutch mechanism. Cross-sectional view, FIG. 6 is a cross-sectional view of the brake mechanism. 1...Workpiece, 2...Fence material, 3...Intersection point (welding position), 4...Machine base, 5...X-axis table,
6... Y-axis table, 7... Upper welding electrode row, 71
... Upper electrode, 8 ... Lower welding electrode row, 81 ... Lower electrode, 12 ... Frame, 13 ... Ball screw, 1
4... Guide bar, 15... Pitch changing motor, 16... Moving frame, 161... Base plate, 162
... Frame plate, 163 ... Transformer mounting bracket,
17...Clutch mechanism, 171...Reception screw, 17
2... Disc board, 173... Arm material, 174...
Pivot, 175... Cylinder, 176... Operating body, 18... Brake mechanism, 181... Arm member, 1
82... Pivot, 183... Operating body, 184... Cylinder.

Claims (1)

[Scope of utility model registration request] This is a welding device that uses multiple welding electrodes arranged in rows to sequentially weld multiple joint points on a workpiece row by row.The upper welding electrode row and lower welding electrode row face each other across the workpiece from above and below. The plurality of upper electrodes constituting one of the upper and lower welding electrode rows are moved to each welding position by a ball screw rotated by a motor, and the welding positions are One welding electrode row is set by fixing the electrodes that have reached the
Two upper electrodes are attached to one movable frame, and these multiple movable frames can be moved laterally by the frame, ball screw, and guide bar arranged in parallel at one location. Each moving frame is equipped with a clutch mechanism engaged with a ball screw and a brake mechanism engaged with a guide bar, and the clutch mechanism of the moving frame to be moved is activated to move the ball. When the screw drive is transmitted and the movable frame reaches the welding position, the clutch mechanism is released and the brake mechanism is activated to fix the brake to the guide bar, so that each movable frame can be moved to an arbitrary position. A welding device characterized by being movable and fixed.