JPH0123676Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a welding rotary support device used when welding a ring of arbitrary shape to the end of a short pipe.

[Prior art]

Conventionally, as a welding rotary support device used when connecting another member to the end of a tube body by welding, (1) as shown in FIG. rollers 8 for supporting the lower part of the tube are installed at intervals in the longitudinal direction of each support stand 6, and a roller drive device 9 is installed on one support stand. (2) As shown in FIG. 2, an arm 12 that is rotated about a horizontal axis by a swing drive device 11 is attached to a base 10, and the tip of the arm 12 has a The center shaft of the turntable 13 is rotatably attached, and a rotation drive device 14 is fixed, and the drive gear 1 is fixed to the output shaft of the drive device 14.
5 is a driven gear 1 fixed to a turntable 13
6, four brackets 17 are fixed to the upper part of the periphery of the turntable 13, and a bolt 19 for adjusting and fixing the center of the short tube 18 is screwed into the brackets 17. etc. are becoming well known.

However, in the case of the rotation support device (1) above, there are problems in that it cannot support an irregularly shaped tube consisting of a short tube and a ring fixed to the end thereof, and it cannot support an inclined tube body. In the case of the rotation support device (2) above, after placing the short tube 18 on the turntable 13, each bolt 19 is
It is necessary to center the short tube 18 with respect to the turntable 13 by appropriately rotating it, and to clamp the short tube 18 with the bolt 19, which requires complicated centering and clamping operations.
Another problem is that the range of response to pipe diameters is narrow.

[Purpose of the invention, structure]

The purpose of this invention is to provide a rotating support device for welding that advantageously solves the above-mentioned problems. A pair of inclined rotary rollers 1 and 2 for supporting the lower surface of the short pipe,
Upper vertical rollers 4 and lower rollers for supporting the ring edge support the upper and lower parts of the front edge of the ring fixed to the front end of the short tube, which are arranged parallel to each other at intervals in the left-right direction and supported by the support stand 3. Vertical roller 5
is a rotary support for welding, which is disposed in front of the tilted rotary rollers 1 and 2 so as to be located on a plane perpendicular to the axis of the tilted rotary rollers, and is supported by a support base 3. It's in the device.

〔Example〕

Next, this invention will be explained in detail using illustrated examples.

Figures 3 and 4 show an embodiment of this invention.
From the right side of the figure to the left side) downward tilt angle θ
A pair of inclined rotary rollers 1 and 2 for supporting the lower surface of short tubes having axes inclined at Inclined cradle 20 on the pedestal 3
The shaft of at least one of the tilted rotary rollers 1 is rotatably supported by a support fitting 21 fixed to the tilted pedestal 20, and the shaft of at least one of the tilted rotary rollers 1 is connected to the output shaft of a rotation drive device 22 consisting of an electric motor with a reduction gear fixed to the tilted pedestal 20. connected.

An upper vertical ring edge supporting roller 4 supports the upper part of the front edge of a frusto-conical ring 23 fixed to the front end of the short pipe 18 by tack welding or the like, and an upper vertical roller 4 supports the lower part of the front edge of the ring 23. The two lower vertical rollers 5 for ring edge support are those rollers 4,
5 are arranged so that the axis of each roller 4,
5 is arranged so as to extend in the radial direction of the front end of the ring 23, one upper vertical roller 4 and two lower vertical rollers are arranged in an inverted Y shape when viewed from the front, and each roller 4, 5 is rotatably attached to the tilting frame 24 of the support base 3.

A guide pedestal 26 extending in the front-rear direction is fixed to the upper end of the column 25 of the support 3, and a movable support 27 is slidably fitted to the guide pedestal 26. A rotatably mounted feed screw rod 28 is screwed into the horizontal electric cylinder 29 which further extends in the front-rear direction.The cylinder of the horizontal electric cylinder 29 is fixed to the movable support base 27, and the cylinder of the vertical electric cylinder 30 is fixed to the horizontal electric cylinder 29. The vertical electric cylinder 30 is fixed to a piston rod, and a welding torch 31 is attached to the piston rod of the vertical electric cylinder 30 .

The short tube 18 in a steel deformed tube 32 consisting of a short tube 18 and a truncated conical ring 23 fixed to its front end edge by tack welding or the like is placed on the inclined rotating rollers 1 and 2, and the The upper and lower front edges of the ring 23 are brought into contact with the upper vertical roller 4 and the lower vertical roller 5, and the welding torch 31 is moved from the position shown by the solid line to the position shown by the chain line, and in this state, the rotation drive device 22 is operated to rotate the deformed tube 32 in a fixed position, and at the same time, the short tube 1
8 and the entire circumference of the ring 23 are joined by welding.

By using a relatively long upper vertical roller 4, it is possible to widen the range of correspondence to the size of the ring diameter without adjusting the position of the upper vertical roller 4. The upper vertical roller 4 can be adjusted to adjust the distance of 4.
If it is attached to the inclined frame 24 so that its position can be adjusted freely, even if a relatively short upper vertical roller 4 is used, the range of correspondence to the size of the ring diameter can be widened.

When implementing this invention, the number of lower vertical rollers 5 may be reduced to one, and the lower vertical roller 5 may be provided on a vertical plane together with the upper vertical roller 4. Further, welding may be performed by disposing a welding torch inside the deformed tube 32, or welding may be performed from both the inside and outside. Furthermore, the ring 23 may have any front shape other than that shown.

[Effect of idea]

According to this invention, a pair of inclined rotary rollers 1 and 2 for supporting the lower surface of a short tube, each having an axis that is inclined downward from the rear to the front, are arranged parallel to each other with an interval in the left-right direction, and are supported by a support base 3. supported,
An upper vertical roller 4 and a lower vertical roller 5 for supporting the ring edge, which support the upper and lower parts of the front edge of the ring fixed to the front end of the short tube, are arranged in front of the inclined rotating rollers 1 and 2. The short pipe 1 is placed on a plane perpendicular to the axis of the short pipe 1
8 and a ring 23 fixed to its end, the short tube 18 of the irregular tube 32 is simply placed on a pair of inclined rotating rollers 1 and 2, and the front edge of the ring 23 is rotated between the upper vertical rollers 4 and 2. By performing the simple operation of bringing the ring into contact with the lower vertical roller 5, it is possible to easily and quickly rotate the ring in a fixed position and perform welding without having to perform complicated centering and clamping operations. It is possible to widen the range of correspondence to the size of the pipe, and furthermore, even an irregularly shaped pipe having an extremely short short pipe portion can be rotated without any trouble.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of a conventional rotary support device for welding, and FIG. 2 is a side view showing another example of the conventional rotary support device for welding. Figures 3 and 4 show an embodiment of this invention.
The figure is a side view of the rotary support device for welding, and FIG. 4 is a front view showing the relationship among the inclined rotary rollers, vertical rollers, and deformed tubes in the rotary support device. In the figure, 1 and 2 are inclined rotary rollers for supporting the lower surface of the short pipe, 3 is a support stand, 4 is an upper vertical roller, and 5
is a lower vertical roller, 18 is a short pipe, 20 is an inclined pedestal,
22 is a rotation drive device, 23 is a truncated conical ring, 24 is an inclined frame, 26 is a guide pedestal, 2
7 is a movable support base, 28 is a feed screw, 29 is a horizontal electric cylinder, 30 is a vertical electric cylinder, 31 is a welding torch, and 32 is a deformed steel tube.

Claims (1)

[Scope of utility model registration request] A pair of inclined rotary rollers 1 and 2 for supporting the lower surface of the short tube, each having an axis that slopes downward from the rear to the front, are arranged parallel to each other with an interval in the left-right direction and supported by a support stand 3. An upper vertical roller 4 and a lower vertical roller 5 for supporting the ring edge, which support the upper and lower parts of the front edge of the ring fixed to the front end, are connected to the axis of the inclined rotating roller in front of the inclined rotating rollers 1 and 2. A rotary support device for welding, characterized in that it is arranged so as to be located on a plane perpendicular to , and is supported by a support stand 3.