JPH07185819A - Copying device of peripheral joint automatic welder - Google Patents

Abstract

PURPOSE:To reduce the fatigueness of a worker as well as make attic welding possible by placing a peripheral joint automatic welding machine on an annular frame arranged along a cylindrical body 1 and executing automatic welding. Also, a welding torch of peripheral joint automatic welding machine is precisely copied to groove recess by a gage member, stable and high precision automatic welding is made possible, the prescribed roundness of cylindrical body is obtained. CONSTITUTION:A peripheral joint automatic welding machine 3 is placed on an annular frame 6 arranged separately from a cylindrical body 1 along the cylindrical body 1, a gage member 8 is mounted on a groove recess part 7, by precisely positioning the position of a guide body 10 in the prescribed distance L from the groove recess part 7 by the gage member 8, the groove recess part 7 of the cylindrical body 1 is automatically welded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying apparatus for a peripheral joint automatic welding machine for welding a joint portion of a tubular body such as a chimney.

[0002]

2. Description of the Related Art Conventionally, a tubular body such as a chimney for a thermal power plant is welded with, for example, three annular unit tubes forming the tubular body to form a single tubular body, and a plurality of tubular bodies are installed at the installation location. It is assembled by sequentially assembling the cylinders with a crane and cylinder lifting device and welding them.

By the way, since a tubular body requires a predetermined roundness, a plurality of welding operators are arranged at regular intervals in the circumferential direction of the tubular body during welding work, or semi-automatic welding is performed. (Self-shielded arc welding, etc.) is being installed at the same time in a horizontal position.

[0004]

In the welding of the cylindrical body such as the above-mentioned chimney, a predetermined roundness is required and the bead appearance is required to be uniform. However, there is a problem that the degree of fatigue of the worker is extremely large.

Therefore, an object of the present invention is to provide a welding device for a cylindrical body which can solve the above problems.

[0006]

A means for solving the problems in the present invention is a copying apparatus of a peripheral joint automatic welding machine, in which a welding torch copies and welds a peripheral joint portion of a tubular body. An annular mount provided along the tubular body separately from the tubular body for guiding and installing the peripheral joint automatic welding machine, and a fitting piece that fits in the groove recess of the circumferential joint part. A gauge member for setting a predetermined distance in the vertical direction from the groove recess, and an annular guide body positioned by the gauge member and contacted by the vertical copying rollers provided in the peripheral joint automatic welding machine. It consists of

[0007]

In the above means for solving the problems, along the tubular body,
An annular mount provided separately from the tubular body is installed, and a fitting piece is fitted in the groove recess of the peripheral joint portion to attach the gauge member to the tubular body, whereby a predetermined vertical direction from the groove recess is provided. Set the distance, attach an annular guide to the gauge member,
The peripheral joint automatic welding machine is installed so that the vertical copying roller contacts the guide body, and the groove recess of the peripheral joint portion is automatically welded.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the copying apparatus of the peripheral joint automatic welding machine of the present invention will be described below with reference to FIGS. As shown in the perspective view of FIG. 1, the copying apparatus according to the embodiment of the present invention has a welding torch 4 of a peripheral joint automatic welding machine 3 for welding a peripheral joint portion 2 of a tubular body 1 such as a chimney. For copying the peripheral joint portion 2.

This is arranged below the peripheral joint portion 2 and has an annular mount 6 for installing and guiding the automatic peripheral joint welding machine 3, and as shown in the side view of FIG. A gauge member 8 for fitting in the groove recess 7 of the circumferential joint portion 2 to set a predetermined vertical distance L from the groove recess 7.
A gauge magnet body 12 for mounting the gauge member 8 on the outer peripheral surface of the tubular body 1 and a magnet body 12 for a gauge arranged above the peripheral joint portion 2 and positioned by the gauge member 8 to the peripheral joint automatic welding machine 3. It comprises an annular guide body 10 with which an up-and-down copying roller 25, which will be described later, abuts from below, and a fixing means 13 for fixing the guide body 10 to the outer peripheral surface of the cylindrical body 1.

As shown in the overall side view of FIG. 7, the pedestal 6 is mounted on a leg 11 installed on the installation surface D of the tubular body 1 at a predetermined distance M from the outer peripheral surface of the tubular body 1. It is arranged.

As shown in FIG. 2, the gauge member 8 is formed in the shape of a rectangular flat plate, and has a trapezoidal shape which fits in the groove recess 7 at the substantially vertical center of the inner surface side (the cylindrical body 1 side) thereof. Fitting pieces 8a are formed, and a plurality of them are arranged at predetermined positions on the peripheral joint portion 2 of the tubular body 1 by the gauge magnet body 12.

The guide body 10 has an L-shaped cross section and is positioned by being installed on the upper surface of the gauge member 8. The fixing means 13 is composed of a guide body magnet body 14 fixed to the outer peripheral surface of the tubular body 1, and a hanging member 15 that abuts on the front surface 10 a of the guide body 10.

As shown in FIGS. 3 and 4, the peripheral joint automatic welding machine 3 is a copying traveling carriage 22 capable of copying traveling along the outer peripheral surface of the cylindrical body 1 on the pedestal 6, and this copying traveling. A vertical copying mechanism 26 which is provided on the carriage 22 and which makes the vertical copying roller 25 come into contact with the guide body 10 from below; and a horizontal copying mechanism 29 which makes the horizontal copying roller 28 come into contact with the outer peripheral surface of the tubular body 1. The welding torch 4 is supported by the transverse frame 30 on the side of the left and right copying rollers 28 so as to be positionally adjustable.

The copying traveling vehicle 22 has magnet wheels 42 which are rotated by the traveling driving apparatus at four corners of a vehicle body 41 having a traveling driving apparatus, and a bogie copying apparatus 43 on the outer peripheral surface of the cylindrical body 1. Is provided.

The dolly copying device 43 includes a dolly body 41.
A mounting frame 44 provided on the mounting bracket 44 is provided with a copying frame 46 which is rotatable via a vertical pin 45, and carriage copying rollers 47A and 47B contacting the outer peripheral surface of the tubular body 1 are provided at front and rear positions of the copying frame 46. It is rotatably supported.

The axle L of the bogie main body 41 is set so as to be inclined by α ° with respect to the tangent line N so as to approach the forward direction F, and the copying frame 46 is tangential line N to the outer peripheral surface of the tubular body 1. Since it is fixed along the direction, the copying traveling vehicle 22 can always move forward in the direction approaching the outer peripheral surface side of the tubular body 1, and can travel along this.

In the vertical copying mechanism 26, an elevating guide rod 54 provided on an elevating frame 27a is movably supported by a vertical support body 53 provided on the front surface of the bogie main body 41 via a linear bearing to elevate and lower. An upper biasing spring 55 provided in the lower portion of the guide rod 54 is configured to bias the vertical copying roller 25 upward through the elevating frame 27a and the roller support arm 27b. Further, the vertical position of the lifting frame 27a can be adjusted by the lifting adjustment screw shaft 57 provided between the upper and lower rods 56.

As shown in FIGS. 5 and 6, the horizontal copying mechanism 29 is mounted on a horizontal support member 61 provided at the front portion of the elevating frame 27a, and on a transverse frame 30a of the transverse frame 30 via a linear bearing. Left and right guide rods 6 provided
2 is slidably supported, and the traverse frame 30a and the roller support arm 3 are supported by the traverse biasing spring 64 at the outer end of the biasing rod 63 provided between the left and right guide rods 62.
The left and right copying rollers 28 are urged toward the outer peripheral surface side via 0b.

The lateral adjustment screw shaft 66 provided between the left and right rods 65 can adjust the lateral position of the transverse frame 30. As shown in FIG. 3, the welding torch 4 is attached to the transverse frame 30 through a torch mount 67 controlled by an arc length control mechanism so that the position of the welding torch 4 can be adjusted.

Next, the welding operation of the tubular body 1 by the peripheral joint automatic welding machine 3 will be described. The tubular body 1 to which the peripheral joint portion 2 is temporarily fixed is installed on the installation table, and the pedestal 6 is installed on the installation surface D via the legs 11. Further, the gauge member 8 is attached to the peripheral joint portion 2 at a predetermined position by the gauge magnet body 12, and the guide body 10 is placed on the upper surface of the gauge member 8 and fixed by the fixing means 13. By doing this, the guide 1
The position of 0 is accurately positioned at the predetermined distance L above the groove recess 7.

The peripheral joint automatic welding machine 3 is arranged on the pedestal 6, and the carriage copying rollers 47A, 4A of the carriage copying device 43 are arranged.
7B is brought into contact with the outer peripheral surface of the tubular body 1 to adjust the axle L of the carriage main body 41. In addition, the vertical copying roller 25 is used as the guide body 1.
0 from below the guide body 10 and the left and right copying rollers 28 against the outer peripheral surface of the guide body 10,
Further, the welding torch 4 is positioned via the torch mount 67.

While the welding material wire is supplied to the welding torch 30, welding is performed and the copying traveling carriage 22 is made to travel along the outer peripheral surface of the tubular body 1 at a predetermined speed. At this time, the vertical copying roller 25 moves along the lower surface of the guide body 10, the horizontal copying roller 28 moves along the outer peripheral surface of the tubular body 1, and the transverse frame 30 is held at a constant horizontal position. The welding torch 4 moves on a fixed path along the peripheral joint 2.

By accurately positioning the guide body 10 at the predetermined distance L from the groove recess 7 by the gauge member 81 as described above, the welding torch 4 can accurately follow the groove recess 7, and thus Thus, extremely stable and highly accurate automatic welding can be performed, a predetermined roundness of the cylindrical body 1 can be obtained, and the bead appearance can be made uniform.

Further, since the groove 6 can be welded automatically only by installing the pedestal 6 and the guide body 10 and installing the peripheral joint automatic welding machine 3 on the guide body 10, the fatigue level of the operator is reduced. Even if a person who does not have advanced welding technology is used, stable and highly accurate automatic welding can be performed.

Further, since the welding torch 4 is aligned with the groove recess 7 by the guide body 10 arranged above the groove recess 7, the welding torch 4 is opened by the mount 1 arranged below the groove recess 7. The positioning of the welding torch 4 is easier than the case of performing the positioning with respect to the front concave portion 7.

Further, even if the copying traveling carriage 22 vibrates, the upper biasing spring 55 of the vertical copying mechanism 26 absorbs the vertical vibration, and the horizontal copying mechanism 29 laterally biases the spring 64. Vibrations are absorbed and hardly transmitted to the welding torch 4.

[0027]

As is apparent from the above description, according to the present invention, the peripheral joint automatic welding machine is automatically installed by installing it on an annular pedestal provided separately from the tubular body along the tubular body. Since the peripheral joint portion of the tubular body is configured to be welded, the degree of fatigue of the operator is reduced, and even a person who does not have a high level of welding technology can automatically weld the tubular body.

Further, by accurately positioning the guide body at a predetermined distance from the groove recess by the gauge member,
The welding torch of the peripheral joint automatic welding machine can be accurately traced to the groove recess, and therefore stable and highly accurate automatic welding can be performed, and a predetermined roundness of the tubular body can be obtained.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a usage state of a copying apparatus of a peripheral joint automatic welding machine showing an embodiment of the present invention.

FIG. 2 is an enlarged side view of the same.

FIG. 3 is an overall plan view of the peripheral joint automatic welding machine.

FIG. 4 is a sectional view taken along line I-I in FIG.

5 is a sectional view taken along line II-II of FIG.

FIG. 6 is a sectional view taken along line III-III in FIG.

FIG. 7 is likewise an overall basic configuration diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical body 3 Circumferential joint automatic welding machine 4 Welding torch 5 Copying device 6 Stand 7 Groove recessed part 8 Gauge member 10 Guide body 13 Fixing means 22 Copying traveling carriage 25 Vertical copying roller 26 Vertical copying mechanism 28 Left and right copying roller 29 Horizontal copying mechanism

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shunsuke Kaneko 5-3-8 Nishikujo, Konohana-ku, Osaka-shi, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Koji Yamamoto 5-chome, Nishikujo, Konohana-ku, Osaka-shi, Osaka No. 28 in Hitachi Shipbuilding Co., Ltd.

Claims (1)

[Claims] 1. A copying apparatus of an automatic peripheral joint welding machine, wherein a welding torch follows and welds a peripheral joint portion of a tubular body, the tubular body being installed and guided by the automatic peripheral joint welding machine. A ring-shaped base provided separately from the tubular body along with a fitting piece that fits in the groove recess of the peripheral joint portion to set a predetermined vertical distance from the groove recess. Of a peripheral joint automatic welding machine, characterized by comprising: apparatus.