JPS6221468A - Welding device - Google Patents

Abstract

PURPOSE:To enable the welding of each face in succession without stopping the rotation of an angular pipe by constituting that the rotation start of a table and the retreat of a horizontal boom are performed when the detecting device of a curve part is operated with the inclination from the position of a vertical line of the pressing force direction acting on the detecting roller of the curve part. CONSTITUTION:The welding is started by advancing the horizontal boom to hold a welding torch after pressing the detecting roller 19 of a curve part to the flat face of a pipe A by supporting the angular pipe A tacking a flange on a table. The vertical line of an engaging part 24 is inclined by the pressing force toward the center of a R part with the downward pressing force acting on the roller 19 when the detecting roller 19 reaches the R part of the pipe A. The R part of the pipe A is welded with the 90 deg. rotation of the table by the operation of the curve part detecting device 28 when said rotation is transmitted to a action shaft 30 via a horizontal pin 18 and transmission device 29. the four faces of the angular pipe can thus be welded successively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a welding device that automatically welds a temporarily attached square pipe and a square flange without stopping their rotation.

[Conventional technology]

When welding a square flange that has been temporarily attached to a square pipe, first weld from one side edge of the upward facing side of the square pipe to the remaining one side edge while running a torch, then stop welding and weld the square pipe at 90°. After rotating it, resume welding work.

The above steps are repeated to weld the entire circumference (each side) of the square pipe.

[Problem that the invention seeks to solve]

Since the welding work must be interrupted each time the square pipe is rotated through 90°, and the welding work must be performed manually, there is a problem in that efficiency is significantly reduced.

Another problem was that a high degree of skill was required to evenly weld each flat surface of the square pipe to a part of the corner.

[Failure to solve the problem]

In order to solve the above problems, this invention provides a rotary table that intermittently rotates a temporarily attached square pipe and a flange, and a self-propelled horizontal table that is arranged to intersect the square pipe at right angles and moves forward and backward. A zoom, an elevating body installed at the tip of this horizontal boom so that it can be raised and lowered and pushed down, a torch supported by welding a flange to a square pipe on the lower end bracket of this elevating body, and a torch that can be freely rotated on the above bracket. A freely rotating roller provided on the horizontal pin is fitted to form a large gap on the outside of the roller, and the lower inner surface of the roller is brought into contact with the lower surface of the outer circumference of the roller. At the same time, there is a curved part detection roller whose outer periphery lower surface is in contact with the outer periphery of the square pipe, a freely rotating salient shaft supported at the center of the end wall of the curved part detection roller, and a slider on the opposing surface between this salient shaft and the horizontal pin. and a transmission device that transmits the rotation of the horizontal pin to the curved portion detection device, i. When the curved portion detection device acts at a predetermined angle from the position, the table starts rotating and the horizontal boom moves backward.

[Effect]

First, a pipe with a flange temporarily attached is supported on a rotary table.

Further, the lower outer circumferential surface of the curved portion detection roller is pressed against one side edge of the upper outer circumferential surface of the square pipe.

Next, when the horizontal boom is advanced at a predetermined speed at the same time as the arc starts, the flange is welded to the square pipe by the torch moving from one side edge of the upper surface of the square pipe to the other side edge.

When the curved portion detection roller reaches the other side edge rounded portion, the vertical line of the downward pressing force acting on the curved portion detection roller is inclined toward the center of the radiused portion.

As a result, the horizontal pin is rotated by the engaging part and the curved part detection device is activated through the transmission device, so the rotation of the cheagle is started, the rounded part is welded, and the horizontal boom is moved back. The torch returns to its original position.

At this time, the pressing force acting on the curved portion detection roller is switched to stop the rotation of the vertical table and move the horizontal boom forward.

By repeating the above steps, welding is performed on all four sides of the square pipe.

〔Example〕

In the figure, 1 is a square pipe A and a flange B that are temporarily attached.
This is a table that rotates intermittently.

The above-mentioned tape Vl is supported on a frame 2 with its plate surface perpendicular to the frame 2, and is intermittently rotated by a motor 3 via a transmission mechanism 4'.

Furthermore, the intermittent rotation of the tape) vl is such that in the case shown in the figure, the square pipe A is square, so it is rotated by 90°.

Further, as a method of supporting the square pipe A to the tape /I/1, for example, a flange B, which is temporarily attached to the pipe A, is bolted (not shown) to the tape /L/1.

Reference numeral 4 denotes a self-propelled horizontal boom that is arranged at a higher position than the square pipe A, intersecting the square pipe A at right angles, and is movable forward and backward.

In the illustrated case, the above-mentioned horizontal boom 4 is constructed by laying a rail 5 parallel to the square pipe A, placing a traveling truck 6 on this rail 5, and providing a case 8 at the upper end of a pillar 7 on the truck 6.
The horizontal boom 4 is passed through the case 8, and a large number of rotors 9 that enclose the upper and lower surfaces and both sides of the horizontal boom 4 are pivotally supported in the case 8, and a rack 10 is mounted on the side of the horizontal boom 4. The rack 10 is provided with the case 8
A pinion 1 driven by a motor 11 installed at
2 and the horizontal game 4 is moved forward and backward by the drive of the pinion 12, but it may be moved forward and backward by other methods.

Reference numeral 13 denotes an elevating body provided at the tip of the horizontal pool 4 so as to be able to rise and fall freely and to be pushed down.

In the illustrated case, the above-mentioned elevating body 13 is made by penetrating a rectangular tube 14 attached to the tip of the horizontal gourd 4 to serve as a guide, and by attaching both ends of a cylinder 15 to the rectangular tube 14 and the elevating body 13. A downward pressing force is applied to the elevating body 13.

Further, a bracket 16 is provided at the lower end of the elevating body 13, and the distal end side of a horizontal pin 18 having a freely rotating roller 17 on the outside of the distal end is rotatably supported on the bracket 16.

Further, on the outside of the roller 17, there is a curved portion where the inner circumferential lower surface contacts the outer circumferential lower surface of the roller 17 when the lower surface is brought into contact with the outer circumferential surface of the square pipe A, which is fitted to form a large gap. A detection roller 19 is provided.

The curved portion detection roller 19 is mounted on the case 20 such that a goo 720 is attached to the bracket 16, and the lower peripheral edge of the curved portion detection roller 19 protrudes through a through hole 21 provided in the bottom wall of the case 20. The curved portion detection roller 19 is incorporated, and bearings 22 are arranged on both sides of the curved portion detection roller 19 to ensure smooth sliding and rotation.

In addition, a freely rotating protruding shaft 23 that protrudes inward is provided at the center of the end wall of the curved portion detection roller 19, and this protruding shaft 23
An engaging portion 24 is provided at an end opposite to the horizontal pin 18 which is eccentric with respect to the protruding shaft 23, and is fitted to be slidable and capable of transmitting rotation.

In the illustrated case, the above-mentioned engaging portion 24 is formed by providing a plate-like body 25 on the horizontal pin 18, forming a vertical groove 26 on the surface of the plate-like body 25, and forming a vertical groove 26 at the end of the protruding shaft 23 in the vertical groove 26. Although the disc 27 as a provision is fitted in the structure, other methods may be used.

28 is a curved portion detection device.

An encoder is used in the curved portion detection device 2 described above.

29 is a transmission device that transmits the rotation of the horizontal pin 18 to the curved portion detection device 28.

In the illustrated case, the above-mentioned transmission device 29 is the curved portion detection device 2
Although the gear 31 provided at the horizontal pin 18 and the sector gear 32 provided at the horizontal pin 18 are engaged with each other, other methods of transmission may be used.

The curved portion detection device 28 rotates the tape (vl) by 90 degrees when the operating shaft 30 rotates by a set angle, and also starts operating the motor 11 to move the horizontal pool 4 backward.

33 is a torch supported by the bracket 16 so as to weld the flange B to the square pipe A.

The welding device according to the present invention has the above configuration, and its operation will be explained next.

First, the flange B is temporarily attached to the tape /L/1 to support the square pipe A.

Further, the lower outer circumferential surface of the curved portion detection roller 19 is brought into contact with the flat surface of one side of the outer circumferential upper surface of the square pipe A, and the curved portion detecting roller 19 is pressed by the extension operation of the cylinder 15.

Next, when the horizontal pool 4 is advanced at a predetermined speed at the same time as the arc is started, the flange B is welded to the υ square pipe A by the torch 33 that moves from one side edge of the upper surface of the square pipe A to the other side edge.

When the curved portion detection roller 19 reaches the other side edge rounded portion, the downward pressing force acting on the curved portion detection roller 19 causes the vertical line of the engaging portion 24 (the lowest point on the outer circumference of the roller 17 to connect to the curved line). Due to the contact with the lowest point on the inner circumference of the curved portion detection roller 19), the engaging portion 24 rotates along the direction of the pressing force, so that the engaging portion 24 rotates along the direction of the pressing force.
The rotation of the horizontal pin 18 is then transmitted to the working shaft 30 via the transmission device 29.

Therefore, the curved portion detection device 28 is activated to detect the tape/L.
/1 is rotated by 90 degrees, and the outer circumferential rounded part of the square pipe A is welded.

Still, the horizontal pool 4 is moved back to its final position.

When the engaging portion 24 rotates back and returns to its original position, the horizontal boom 4 is brought to a backward stop W by the transmission device 29.
Since the horizontal boom 4 also rotates back, the curved portion detection device #28 may be activated to stop the horizontal boom 4 from moving backward.

By repeating the above steps, welding is performed on all four sides of square pipe A.

Note that the rotating direction of the table and the advancing direction of the boom are not limited.

〔effect〕

As described above, according to the welding device of the present invention, when the horizontal boom is advanced to weld the flange to the outer periphery of the square pipe, and the curved part detection roller reaches the rounded part of the square pipe, the curved part detection roller The vertical line of the engaging part due to the downward pressing force acting on the curved part is tilted by the pressing force towards the center of the rounded part, and while rotating the horizontal pin, the transmission device is passed through the curved part detection device, and the curved part detection device is activated. Since the horizontal boom is rotated and retracted, each side of the square pipe can be continuously welded without stopping the rotation of the square pipe.

Therefore, work efficiency can be significantly improved.

However, by pressing the curve detection roller against the outer periphery of the square pipe and keeping the distance between the torch and the outer periphery of the square pipe constant, uniform welding can be performed.

[Brief explanation of the drawing]

The drawings show a welding apparatus according to the present invention, in which Fig. 1 is a front view, Fig. 2 is a side view, Fig. 3 is an enlarged longitudinal side view showing the main parts of the same, and Fig. 4 is a front view of the same. FIG. 5 is a vertical front view, and FIG. 6 is a cross-sectional plan view of the engaging portion. A... Square pipe, B... Flange, 1 ・Table, 2... Frame, 3... Motor, 4... Horizontal boom, 5... Rail, 6... Traveling trolley, 7 ... Pillar material, 8... Case, 9... Rotor, 10... Rack, 11... Motor, 12... Pinion, 13...
... Lifting body, 14... Square tube, 15... Cylinder, 1
6...Bracket, 17...Roller, 18...Horizontal pin, 19...Curved portion detection roller, 20...Case, 21...Through hole, 22...Bearing, 23...
・Protruding shaft, 24... Engaging portion, 25... Plate-shaped body, 26.
... Vertical groove, 27 ... Disc, 28 ... Curved part detection device, 29 ... Transmission device, 3o ... Axis of action, 31 ... Gear 32 ... Sector gear, 33 ... Torch Patent applicant Matsumoto Kikai Co., Ltd. Agent
sickle 1) sentence 2

Claims (1)

[Claims] A rotary table that intermittently rotates the temporarily attached square pipe and flange, a self-propelled horizontal boom that is placed perpendicular to the square pipe and moves forward and backward, and a movable vertical boom that can be raised and lowered at the tip of the horizontal boom. and a torch supported by welding a flange to a square pipe on the lower end bracket of the elevating body, and a freely rotating horizontal pin supported on the bracket, and attached to the horizontal pin. A curved line in which a freely rotating roller is fitted to the outside of the roller to form a gap so that the lower inner surface of the roller is in contact with the lower surface of the outer circumference of the roller, and the lower surface of the outer circumference is in contact with the outer circumference of a square pipe. A portion detection roller, a freely rotating protruding shaft supported at the center of the end wall of the curved portion detection roller, and an engaging portion that is slidable and fitted to the opposing surface of the protruding shaft and the horizontal pin so as to transmit rotation. , a transmission device that transmits the rotation of the horizontal pin to the curved portion detection device, and when the direction of the pressing force acting on the curved portion detection roller from the roll is tilted at a predetermined angle from the vertical line position and the curved portion detection device acts, the table Welding equipment in which the rotation of the horizontal boom is started and the horizontal boom is retracted.