JPH058035A - Method for fitting stud material to tubular material - Google Patents

Abstract

PURPOSE:To comparatively easily automate stud fitting to a tubular material by using an annulus ring type stud as a stud material. CONSTITUTION:A pipe having the specified diameter is cut to produce annulus ring type studs 10 which are put and stored in a vessel, subdivided and put in lined-up conveyors in proper quantity. The studs 10 are run through a groovelike shoot 28 and conveyed up to the upper part of a core metal 12. Movable welding torches for carbon-dioxide automatic welding are provided on both side positions of the annulus ring type stud 10 mounted on the core metal 12. A rotary holding device is driven to drive the core metal 12 by 90 deg. and the next annulus ring type 10 is mounted on the core metal 12. After the core metal 12 is rotated by 90 deg., a stopper device 36 is released, the annulus ring type stud 10 which has been stopped is dropped and mounted on the core metal 12 to start next welding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a metal ring as a stud material and is suitable for automatically welding and fixing the stud material around a tubular material such as a lance pipe. Regarding

[0002]

2. Description of the Related Art Conventionally, for example, an amorphous refractory is coated around a lance pipe or the like in order to protect the material from high temperatures. However, the surface of the pipe is directly coated with the refractory. Since there is a risk of falling, a stud that serves as a holding material has been placed inside. An example of such a stud is Japanese Patent Laid-Open No. 57-5893.
A Y-shaped stud as described in Japanese Patent No. 8 is known. As a jig for temporarily attaching the Y-shaped stud, a stud temporary attaching jig using a magnet is known in Japanese Utility Model Laid-Open No. 61-111682.

[0003]

However, the above-mentioned Y
Molded studs first require time and effort to manufacture, and if a large number of Y-shaped studs are put in a box, the studs themselves tend to get entangled, making it difficult to take out and transport the individual studs. Automation was difficult. Further, in the case of the Y-shaped stud, since the tip portion is sharp, there is a problem that the refractory is likely to crack due to a difference in thermal expansion or the like. Therefore, as a result of earnest research, the present inventor cut a pipe to manufacture an annular stud,
If this is used as a stud material, there are no sharp parts, so it is difficult for cracks to enter the refractory, and if it is an annular shape, even if a large number of annular studs are put in the same box, mutual entanglement will occur. It has been found that there is little and therefore automation is easily feasible.

The present invention has been made under such circumstances, and an object of the present invention is to provide a method for attaching a stud member to a tubular article which solves the above problems.

[0005]

According to the present invention, there is provided a method for attaching a stud material to a tubular article according to the above object, which is a method for attaching a stud material to a tubular article using an annular stud as a stud material. A step of aligning and removing the prepared ring-shaped studs and transporting them to a predetermined position of the tubular article, and a step of holding the transported ring-shaped studs and fixing the annular studs to the tubular article by welding. And a step of sequentially holding and fixing another transported annular stud to the tubular object while changing its mounting position.

The ring-shaped stud is preferably made by cutting a pipe having a predetermined diameter into short pieces having a predetermined length. However, the present invention is applicable even when the wire rod is bent into a circle. .. Further, the method of aligning the annular studs may be a method using vibration or image processing.

[0007]

In the method of attaching the stud material to the tubular article according to the present invention, since the annular stud is used, the production thereof is easy, and the expansion of the refractory article is less likely to occur. Further, since the ring-shaped studs are less entangled, they can be easily aligned, and therefore the tubular product can be easily transported to a predetermined position and can be easily held. When the annular stud is welded and fixed to another place on the surface of the tubular object, for example, the annular stud is moved or the tubular object is rotated, and when necessary, Is done by moving laterally.

[0008]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. FIG. 1 is a schematic process diagram showing a method of attaching a stud material to a tubular article according to an embodiment of the present invention, FIG. 2 is a side view of a core bar of a lance pipe which is an example of the tubular article, and FIG. FIG. 4 is a cross-sectional view showing a state in which the lance pipe is held, FIG. 4 is a perspective view showing an aligned transportation state of the annular stud, FIG. 5 is a side view showing a transportation state of the annular stud, and FIG. 6 is welding of the annular stud. FIG. 7 is a front view showing a situation, FIG. 7 is a front view showing a transportation state of the annular stud, and FIG. 8 is a side view of the same.

As shown in FIG. 1, first, a pipe having a predetermined diameter (for example, SGP, STPG) is, for example, 10 pipes.
The ring-shaped stud 10 is manufactured by cutting into a length of mm (step I). This cutting may be performed automatically, but the ring-shaped stud 10 cut in another place in advance may be prepared. The ring-shaped stud 10 is a refractory-covered portion 13 of a core metal 12 of a lance pipe which is an example of a tubular object shown in FIG.
A case in which an embodiment of the present invention is applied to the method of attaching to the will be described.

First, the cored bar 12 is previously gripped by a rotary gripping device 14 whose cross section is shown in FIG. This grip portion is the base end portion 15 that does not cover the refractory, and since the reinforcing ribs 16 to 19 are normally provided in the right-angled direction, the lower reinforcing rib 16 fits into the fixing groove 20 and the reinforcing ribs on both sides are provided. 17 and 19 are gripped by gripping claws 23 and 24, which are moved forward and backward by cylinders 21 and 22, to firmly fix the cored bar 12. And the cylinder 2
The supporting members to which the first and the second grooves 22 and the fixing groove 20 are attached are formed as a hollow cylinder 25 having an open upper part, around which drive rollers 26a are arranged at relatively close intervals, and at least the hollow cylinder 25 is 270 degrees. It can be rotated more than that.

The ring-shaped stud 10 is stored in advance in a container (not shown), and a small amount is put into the alignment conveyors 26 and 27 as shown in FIG. The aligning conveyors 26 and 27 have a vibration generating source (not shown), and gradually convey the annular stud 10 put on the plate to the peripheral portion, and thereafter, the annular stud 10 is grooved. It is poured into the chutes 28 and 29 and is conveyed to the upper portion of the cored bar 12 (step II). The chute 28 mounts the annular stud 10 on the cored bar 12 with its axis parallel, and the chute 29 makes the axial center on the cored bar 12 orthogonal to the annular stud 10. Put.

Then, such alignment conveyors 26, 2
It is assumed that 7 are provided in parallel in a required number according to the length of the lance pipe. The tip portion of the chute 28 is shown in FIGS. 5 and 6, and as shown in the figure, a holding device 32 including an air cylinder 30 and a pressing plate 31 connected to the air cylinder 30 is provided at the tip portion of the chute 28. The annular stud 10 that is provided and falls in the chute 28 and contacts the uppermost portion of the cored bar 12 is gripped (step III).

Welding torches 33 and 34 for automatically advancing and retracting carbon dioxide gas are provided on both sides of the ring-shaped stud 10 mounted on the core metal 12, and mounted on the ring-shaped stud. Both lower parts of 10 are fixed by welding (step IV). After this, the upper air cylinder 30
To release the pressing state of the pressing plate 31, drive the rotary gripping device 14 to rotate the core bar 12 by 90 degrees as described above, and place the next annular stud 10 on the core bar 12. However, in this case, the opening 35 is formed on the lateral side of the chute 28 so that the annular stud 10 is allowed to come out in the clockwise direction as it is, and the upper annular stud 10 does not immediately fall. As described above, the stopper device 36 driven by the air cylinder is provided on the way. The ring-shaped stud 10 which was stopped by releasing the stopper device 36 after the core metal 12 rotated 90 degrees
Is dropped, placed on the cored bar 12, and the next welding is started (step V).

Next, the structure of the tip of the chute 29 which is arranged alternately with the chute 28 will be described with reference to FIGS. 7 and 8, and the tip of the chute having a rectangular cross section is provided with an opening 37 in the rotational direction. Air cylinder 3 in opening 37
A lid 39 that is opened and closed by 8 is provided. And
The lid 39 is provided with a holding device 42 having a pressing plate 41 driven by an air cylinder 40, and presses and fixes the annular stud 10 at a predetermined position. Further, a stopper device 43 driven by an air cylinder is provided on the opposite side of the chute 29, so that the drop of the upper annular stud 10 is stopped by the pin 44 protruding. Therefore, when the lid 39 is closed and the annular stud 10 is dropped in a state where the holding device 42 is not operated in advance, the annular stud 10 is placed on the cored bar 12 so that their central axes are orthogonal to each other. Next, the holding device 42 is actuated to hold the annular stud 10 by the pressing plate 41, and the welding torches 45 and 46 on both sides are actuated to weld and fix both end portions thereof (step IV). After the welding is completed, the air cylinder 38 is contracted to close the lid 39.
Open, and while driving the stopper device 43, the rotary gripping device 14 is driven to remove the annular stud 10 from the chute 29 and drop the upper annular stud 10 to the position of the pin 44. .. After that, the pin 44 is retracted, the annular stud 10 is dropped onto the cored bar 12, the lid 39 is closed again, and the above process is repeated (step V).

In the above embodiment, the aligning conveyor utilizing vibration is used as the aligning means of the annular studs, but the pattern of the annular studs is recognized by the image processing using the television camera and aligned in the predetermined direction. A chute is used as the conveying means of the annular stud, but a conveyor driven by power may be used. Further, in the above-mentioned embodiment, the annular studs are alternately orthogonally crossed and fixed to the tubular object, but they may be alternately inclined, and further, annular studs having large and small diameters may be mixed. It is also possible to attach a carriage to the rotary gripping device in order to reduce the number of the welding torches, and to move it back and forth in the axial direction of the core metal.

[0016]

As described above, in the method of attaching a stud to a tubular article according to the present invention, since the annular stud is used as the stud material, the attachment of the stud to the tubular article can be automated relatively easily. can do.

[Brief description of drawings]

FIG. 1 is a schematic process drawing showing a method for attaching a stud member to a tubular article according to an embodiment of the present invention.

FIG. 2 is a side view of a core metal of a lance pipe which is an example of a tubular object.

FIG. 3 is a cross-sectional view of a state in which a lance pipe is held.

FIG. 4 is a perspective view showing a state in which the annular studs are aligned and conveyed.

FIG. 5 is a side view showing a transportation state of the annular stud.

FIG. 6 is a front view showing a welding state of an annular stud.

FIG. 7 is a front view showing a transportation state of an annular stud.

FIG. 8 is a side view showing a transportation state of the annular stud.

[Explanation of symbols]

 10 Annular Stud 12 Core Bar 13 Refractory Covering Part 14 Rotating Gripping Device 15 Base End Part 16 to 19 Reinforcing Rib 20 Fixing Groove 21, 22 Cylinder 23, 24 Gripping Claw 25 Missing Cylinder 26a Drive Roller 26, 27 Aligning Conveyor 28 , 29 Chute 30 Air cylinder 31 Holding plate 32 Holding device 33, 34 Welding torch 35 Opening 36 Stopper device 37 Opening 38 Air cylinder 39 Lid 40 Air cylinder 41 Holding plate 42 Holding device 43 Stopper device 44 Pin 45, 46 Welding torch

Claims (1)

Claim: What is claimed is: 1. A method for attaching a stud material to a tubular object, which uses an annular stud as a stud material, wherein an annular stud prepared in advance is aligned and taken out. The step of transporting to a predetermined position, the step of holding the transported ring-shaped stud and fixing the ring-shaped stud to the tubular object by welding, and the step of mounting another transported ring-shaped stud at the mounting position. A method of attaching a stud material to a tubular article, which comprises the step of sequentially holding and fixing the tubular article while changing the stud material.