JPH0638622Y2 - Automatic vertical welding machine - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to an automatic vertical welding machine, and more specifically, for example, using TIG or CO ₂ and stacking a plurality of workpieces. The present invention relates to an automatic vertical welding machine that performs welding at one time.

(Prior Art) A conventional automatic vertical welding machine has a function of vertically welding a single work piece. When welding the four corners of a rectangular work, etc., the welding itself is automated, but the four corners are Welding work is being carried out while the setup is changed.

(Problems to be solved by the invention) By the way, in the above-mentioned conventional automatic vertical welding machine, work piece welding is generally used. Therefore, there is a problem in that productivity cannot be expected to be improved, and in the case where there are many welding parts such as a rectangular work, a total work time and manpower are required to change the setup each time. Further, in the welding of the corner portion of the work, there is a problem that the welding start portion is melted down to cause a defective welding portion.

The purpose of this invention was made in view of the conventional problems as described above, so that a plurality of works can be stacked and placed, and welding work of a plurality of welded parts such as a rectangular shape can be automatically performed. To provide a new automatic vertical welding machine that

[Configuration of Device] (Means for Solving the Problem) In order to achieve the above object, the present invention has a table on which a rectangular work can be placed, and an X-shaped table that can be retracted to the center of the table upper surface. , A rotary table provided so as to be movable in a direction intersecting the Y axis and rotationally positionable, a movable work holder device for moving a workpiece in the X axis direction and the Y axis direction respectively, and moved by the work holder device. An automatic vertical welding machine is configured to include a stopper device that can move forward and backward to position the corners of a work, and a torch drive unit that has a welding torch that welds the corners of the work and that can move up and down.

(Operation) As is apparent from the above configuration, the square-shaped workpieces stacked on the table are sequentially moved to the welding positions by moving the rotary table up and down, left and right, and rotationally positioning. You can Further, the work on the table is moved in the X-axis and Y-axis directions by the work holder device, and both sides of the corners of the work are brought into contact with the stopper device to position the work. At this time, the position of the stopper device is adjusted according to the shape of the contact surface of the work so that the corner of the work is located on the extension line of the welding holder.

Then, the welding work is performed by operating the welding torch drive unit on the corner portion of the positioned work.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 and 2 conceptually illustrate the overall structure of an automatic vertical welding machine using TIG or CO ₂ .

In the automatic vertical welding machine 1, in the center of the table 3 on which, for example, a rectangular work W (shown by a chain double-dashed line) is placed, the table 3 can be moved in and out freely from the upper surface of the table 3, and can be rotated and rotated. A table 5 is provided. Outside the two intersecting sides of the table 3, there is provided a work holder device 7 for moving the work W placed on the table 3 in the X-axis and Y-axis directions, respectively. Further, the table 3 is also provided with a stopper device 9 that comes into contact with both sides of the corners of the workpiece W transferred by the workpiece holder device 7.

Further, a vertically movable torch drive unit 13 provided with a welding torch 11 for welding the corner portion of the work W is provided with the stopper device 9.
On the upper surface of the torch drive portion 13 provided in the vicinity of, a welding auxiliary block device 17 provided with a block 15 that can be brought into contact with and separated from the upper surface of a corner portion of the work W is vertically installed.

More specifically, the table 3 is formed of a frame 19 having a rectangular shape, a top plate 21 is provided on the upper surface thereof, and a rotary table 5 is provided at a central portion of the top plate 21 so that the rotary table 5 can be retracted. Is provided.

The rotary table 5 includes a rotary plate 25 which is always flush with the upper surface of the top plate 21 of the table 3. On the lower surface of the rotary plate 25, there is provided a rotary drive unit 29 having an index control servomotor 27 whose rotation angle can be freely set according to the welding site of the work W. The lower side of the rotation drive unit 29 is supported by a support column 31 that is vertically expandable and contractible, for example, a mechanism including an inner and outer cylinder, and the lower portion of the support column 31 is fixed to a base 33.

A vertical movement fluid pressure cylinder 35 is provided between the base 33 and the rotary drive unit 29.

Further, in the base 33, a plurality of rails 39 are arranged on a frame 37 provided in a diagonal direction of the frame body 19 of the table 3, and the base 33 can be mounted on the rails 39 so that the base 33 can move freely. Fluid cylinder for transfer 41 provided
As a result, the rotary table 5 becomes movable via the base 33.

In the above configuration, the works W stacked on the table 3
The vertical movement fluid pressure cylinder 35 is operated to raise the rotary table 5, and the work W is separated from the top plate 21 of the table 3. Next, the transfer fluid pressure cylinder 41 is actuated, the work W is moved to a position where it does not come into contact with other equipment during rotation, and the index control motor 27 is rotated to rotate the drive unit.
The rotary plate 25 is indexed by rotating it through a predetermined angle through 29. After that, the transfer fluid pressure cylinder 41 is pulled back to the old position, the vertical movement fluid pressure cylinder 35 is lowered, and the work W is transferred onto the top plate 21 of the table 3 to move the work W.
The next welding site can be positioned.

The work holder device 7 is positioned parallel to the outside of the two intersecting sides of the table 3 and is movable in the left-right direction, that is, the X-axis direction and the up-down direction, that is, the Y-axis direction in FIG. A push plate 43 that comes into contact with the work W is provided at one end of the holder device 7. Note that the X axis,
The work holder device 7 provided in the Y-axis direction has the same configuration.

The structure is such that a plurality of rails 47 are provided in parallel with the side edges of the table 3 on a support base 45 provided integrally with the frame body 19 of the table 3.
Is provided, and the push plate 43 is movably engaged with the rail 47 thereof. The push plate 43 is screwed into a screw rod 49 provided between the rails 47, and the push plate 43 is driven in the X-axis and Y-axis directions by driving a servomotor 51 or the like provided at the end of the screw rod 49. It can be moved freely. In addition, the stacked work W
The contact surface 53 has a height sufficient to contact the contact surface 53.

The stopper device 9 will be described with reference to FIGS. 3 and 4 together. Support base for supporting the work holder device 7
A stopper device 9 is provided on the extension of 45, and is a mechanism for positioning the corner portion where the workpiece W is to be welded. The two units have the same configuration.

The configuration is such that a bracket 55 is provided on the support base 45, and the bracket 55 is provided with a plurality of rails 57 extending in a direction perpendicular to the side of the work W.
A stopper member 59 is engaged with the upper portion of 55 so as to be movable forward and backward. A screw rod 61 is provided between the rails 57, a nut 65 fitted in a nut receiver 63 hanging from a stopper member 59 is screwed into the screw rod 61, and a handle 67 provided at the end of the screw rod 61 is rotated. As a result, the stopper member 59 moves forward and backward. Further, the stopper member 59 is provided with a reference surface 69 having a height sufficient for contacting the work W. The handle
Of course, 67 may be replaced with a motor or the like.

With the above configuration, the work W placed on the table 3 is moved by the push plate 43 of the work holder device 7, and the work W is brought into contact with the reference surface 69 of the stopper device 9,
The position of the corner portion where the workpiece W is welded can be located on the extension line (XX line) of the welding torch 11. (4th
See figure). As shown in FIG. 4, when a protrusion 71, a step, or the like is provided on one side of the work W, the reference surface 69 of the stopper member 59 is adjusted by moving the handle 67 forward and backward to adjust the reference surface 69. On the extension line of welding torch 11 (XX
It is possible to position the welding site of the work W on the line).

Next, the welding torch 11, the torch drive unit 13, and the welding auxiliary block device 17 will be described. Referring also to FIG. 5 and FIG. 8, the torch drive unit 13 is erected on a support base 73 integrally provided on the frame 19 of the table 3, and the torch drive unit 13 has a frame 75. A plurality of guide bars 77 are provided.

A torch holding member 79 of the welding torch 11 is engaged with the guide rod 77 and is vertically movable. The vertical movement of the pinion engages with the rack 81 suspended from the torch holding member 79.
It is driven by a servo motor 85 or the like that locks 83.

The torch holding member 79 includes an arm that can be rotationally positioned.
87 is provided, and the welding torch 11 is locked to the tip of the arm 87, so that the welding corner can be adjusted freely. A welding portion of the work W is positioned on an extension line (XX line) of the welding torch 11. The welding torch 11 and TIG or C
The configuration of the O ₂ generation source is generally known and will not be illustrated and will not be described in detail.

The welding auxiliary block device 17 is provided on the upper end of the frame 75 of the torch drive unit 13, and the servo motor 91 and the like are provided on the base 89 provided integrally with the frame 75. A pinion 93 is locked to the output shaft of the servomotor 91, and a rack 95 meshing with the pinion 93 penetrates the base 89 and is erected on the block 15. The block 15 is provided with a plurality of guide rods 97 for guiding up and down movement, and is engaged through the base 89.

With the above configuration, after the work W is set at a predetermined position, the servo motor 91 of the welding auxiliary block device 17 is driven to bring the block 15 into contact with the corner of the work W. The block 15 is formed with a corner so as to be the same as the portion of the work W to be welded. (See FIG. 8) On the other hand, the servo motor 85 of the torch drive unit 13 is driven to position the spraying position of the welding torch 11 at an appropriate position of the block 15 of the welding auxiliary block device 17, and the welding operation is started. In the conventional welding method, as shown in FIG.
Since the welding starts at the beginning of the work W, an incomplete welded portion such as the Y portion is generated and the quality is deteriorated. However, since the present invention starts the welding at the predetermined position of the block 15, the incompletely welded portion is the work W. It is possible to improve the quality of the welded part.

As will be understood, according to the present embodiment, the works W are stacked and placed on the table 3, and the work can be fully automated until, for example, the four corners of the square work W are welded. It is a composition.

The operation sequence of the automatic operation will be described with reference to FIGS. 6 and 7.

6 (a) and 7 (a) show one of the four corners of the work W.
7 shows a state in which the welding work of one corner is completed, and from this state, the push plate 43 of the work holder device 7 is moved in the direction shown by the arrow in the drawing of FIG.

When the push plate 43 is retracted by a predetermined amount, the vertical movement fluid cylinder 35 of the rotary table 5 is operated to raise the rotary plate 25. (See FIGS. 6 (b) and 7 (b)) At the upper limit of rotation of the rotary plate 25, as shown by the arrow in FIG. 6 (c), the transfer fluid pressure cylinder 41 of the rotary table 5 is moved. It is operated to separate the work W placed on the rotary plate 25 from the welding torch 11. This transfer amount is such that the corners of the work W placed on the rotary plate 25 do not contact the push plate 43 of the work holder device 7 and the stopper member 59 of the stopper device 9 during rotation. (See FIG. 6 (c) and FIG. 7 (c)) Next, in the case of the work W having a quadrangular shape as in this embodiment, the index control servomotor 27 of the rotary table 5 is rotated by 90 degrees. To rotate the rotary plate 25 via the rotary drive unit 29. By the rotation, the portion to be welded next to the work W faces the welding line X-X line of the welding torch 11. (See FIG. 6 (c) and FIG. 7 (c)) From the above state, as indicated by the arrow in FIG. 6 (d),
Operate the transfer fluid pressure cylinder 41 of the rotary table 5,
After the rotary plate 25 is returned to the old position, the vertical movement fluid pressure cylinder 35 is operated to lower the rotary plate 25 and return to the old position. When the rotary plate 25 returns to the old position, the rotary plate
The work W placed on 25 is transferred onto the top plate 25 of the table 3. (See FIG. 6 (e)) After that, the push plate 43 of the work holder device 7 is moved in the direction shown by the arrow in FIG. 7 (e), and the work W is pushed by the contact surface 53 of the push plate 43. The workpiece W is brought into contact with the reference surface 69 of the stopper member 57 of the stopper device 9. In this state, the welding portion of the work W is located on the welding line X-X line of the welding torch 11.
Next, the block 15 of the welding auxiliary block device 17 is brought into contact with the welding portion of the work W, and the welding work is performed by the welding torch 11.

As described above, the work W
Corner welding can be fully automated. Although not shown, a detector (a limit switch or the like) is provided for starting or stopping each device, and the detection signal from the detector interrupts the operation one after another. In this way, since the works W that are stacked are fully automatically welded, the productivity can be improved.

By the way, the present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. For example, although a fluid pressure cylinder is used for the operation of each device, it can be changed to a motor or the like, and a device using a servo motor may be a fluid pressure cylinder, and the stopper device described as the manual handle adjustment may be a motor or a motor. Of course, a fluid pressure cylinder may be used.

That is, the present invention can be implemented with various modifications.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, for example, a plurality of rectangular works can be stacked and welded at one time, and further, the four corners of the work can be welded. Since it can be carried out fully automatically, productivity can be improved.

[Brief description of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 conceptually show the entire structure, FIG. 1 is a front view, and FIG. 2 is a plan view in FIG. 3 and 4
The figure shows the stopper device, and FIG. 3 is III in FIG.
FIG. 4 is an enlarged sectional view taken along line III-III, and FIG. 4 is a plan view of FIG. FIG. 5 is an enlarged cross-sectional view taken along the line VV in FIG. 6 and 7 are operation explanatory views, FIG. 8 is an explanatory view showing a welding start point, and FIG. 9 is an explanatory view showing a welding surface of a conventional example. DESCRIPTION OF SYMBOLS 1 ... Automatic vertical welding machine, 3 ... Table 5 ... Rotary table, 7 ... Work holder device 9 ... Stopper device, 11 ... Welding torch 13 ... Torch drive part, 15 ... Block 17 ... Welding auxiliary block device

Claims (1)

[Scope of utility model registration request] 1. A table on which a square-shaped work can be placed, and a rotary table which is provided at the center of the upper surface of the table so as to be retractable so as to be movable in a direction intersecting the X and Y axes and to be rotationally positioned. , A movable work holder device for moving the work in the X-axis direction and the Y-axis direction, a stopper device for moving forward and backward for positioning a corner portion of the work moved by the work holder device, and a corner portion of the work. An automatic vertical welding machine, comprising: a torch drive unit having a welding torch for welding and movable up and down.