KR20140067569A - Overlay welding positioner - Google Patents

Abstract

The present invention relates to an overlay welding positioner to perform a sealed welding on the inner surface of a pipe connector including a T-shaped pipe, a crossed pipe, and a reducer and, more specifically, to an overlay welding positioner improved to be capable of efficiently and positively perform a sealed welding on the inner surfaces of the pipes having various shapes. According to the present invention, the inner surfaces of the target pipes having various shapes, such as a T-shaped pipe, a crossed pipe, and a reducer, can swiftly and easily be sealed-welded. Moreover, in a situation wherein a standard or a size of the target pipe is changed, an upper or lower attachment structure of the target pipe can be altered to quickly and stably cope with the change, having excellent adaptability to the target pipe having various standards. In addition, according to the present invention, a slip ring is installed on a base frame to supply electricity to a second direction rotation motor on a rotation frame, thus preventing a twist of electric cables caused by the rotation of the rotation frame.

Description

[0001] Overlay welding positioner [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an overlay welding positioner for performing over welding on inner surfaces of pipe fittings including a tee pipe, a cross pipe, a reducer and the like. More specifically, And more particularly to an overlay weld positioner that can be reliably performed.

Corrosion and abrasion are a kind of chemical and mechanical damage occurring on the surface of metal materials in general, and are one of the important factors determining the life and operating condition of mechanical parts. Particularly, abrasion occurs in various forms depending on the type and method of load, speed, temperature, material, lubricant, and environment of use. In order to prevent abrasion, a method of hardening the surface of the material, Has been consistently achieved. As a part of such efforts, a cladding alloy for surface hardening, which satisfies the basic characteristics such as abrasion resistance, corrosion resistance and weldability, has been developed by cladding various wear resistant alloys on a base material of mild steel.

In general, carbon steel, which is a low-grade material, is used for piping of power generation facilities, petrochemical plant facilities, ships and marine facilities, and overlaying materials such as stainless steel and nickel alloy, which have corrosion resistance, high strength and durability, welding.

Patent Application No. 10-0909596 entitled "Pipe Inner Surface Automatic Welding Welding Apparatus ", Registered Patent No. 10-0919641" Automatic Storage and Welding Apparatus for Inside Storage, "Registered Patent No. 10-0949062" Plasma Automatic Growing of Butterfly Valve And a ball valve automatic welding apparatus, etc., disclose apparatuses for automatically performing over welding on the inner circumferential surfaces of such industrial pipes, elbows, and valves.

However, these conventional devices are specialized for welding the inner surfaces such as the straight tube, the elbow tube, the butterfly valve, and the ball valve, and they are used for connecting the piping connection parts such as Tee, Cross tube, Reducer, There is a problem that it is not suitable to be applied to the inner circumferential overlapped welding.

Therefore, it has become necessary to develop a new welding positioner capable of rapidly, accurately, and efficiently performing inner circumferential upset welding of various types of pipe joints having various shapes such as a tee pipe, a cross pipe, and a radyu.

Registered Patent No. 10-0909596 "Pipe Inner Self-Propelled Welding Apparatus" Registered Patent No. 10-0919641 entitled " Patent No. 10-0949062 entitled "Plasma Automatic Growing Welding Device for Butterfly Valve" Registered Patent No. 10-1150354 "Ball Valve Automatic Growing Welding Device"

It is an object of the present invention to provide a welding method and a welding method capable of effectively performing over welding on the inner surface of a workpiece having various shapes such as a Tee-type pipe, a cross tube, and a radyer, To provide a welding positioner.

In addition, in the present invention, regardless of the size and specification of the workpiece, the workpiece can be stably mounted and the welding posture of the workpiece can be freely switched, thereby improving the production efficiency of the over welding work.

In order to achieve the above-mentioned object, the present invention provides a base frame comprising: a base frame provided on a floor; A rotating frame (102) composed of a rotating first frame (102a) and a rotating second frame (102) provided vertically and mounted on the base frame so as to be rotatable in a first direction; A first direction rotating motor (111) fixedly mounted on the base frame and transmitting rotational power to rotate the rotating frame in the first direction; A rotating plate (103) rotatably mounted on the rotating second frame in a second direction; A second direction rotating motor 121 fixedly attached to the rotating second frame to transmit rotational power to the rotating plate; A plurality of V blocks including a first slide block (126) and a second slide block (127) mounted on the rotating plate so as to face each other so as to be spaced apart or narrowed by linearly moving left and right; A lifting screw shaft 131 rotatably installed on an upper support 102c extending from an upper end of the rotary first frame 102a and having threads formed on an outer circumferential surface thereof, (132), and a plurality of fasteners (133) mounted on the support block; And an overlay welded positioner.

A first direction motor gear 112 is installed on a motor shaft of the first direction rotating motor 111 and engaged with a first direction rotating gear 113 fixedly mounted on the rotating first frame 102a, A second direction motor gear 122 is installed on the motor shaft of the second direction rotating motor 121 so as to engage with the second direction rotating gear 123 fixedly mounted on the rotating plate 103.

The fixture 133 includes a shaft portion 133a and a head portion 133b having an outer diameter larger than that of the shaft portion. An elastic spring 134 is disposed on the shaft outer diameter between the head portion and the support block 132 .

In addition, it is preferable that the plurality of V blocks are arranged on the rotating plate so that four pairs of the V blocks are perpendicular to each other in the circumferential direction.

According to the present invention, it is possible to quickly and easily perform the inner surface welding of the workpieces having various shapes including a tee pipe, a cross pipe, a reducer, and the like. In addition, when the specifications and sizes of the workpieces to be welded are different, it is possible to quickly and stably cope with each other by varying the structure of the workpieces to be welded on the upper and lower sides.

In addition, according to the present invention, a slip ring is provided in the base frame to supply electric power to the second direction rotating motor on the rotating frame, so that the electrical cable can be prevented from being twisted by the rotation of the rotating frame.

1 is a front view of an overlay welding positioner and a multi-joint welding robot according to the present invention.
2 is a front view of the overlay weld positioner of the present invention.
Fig. 3 is a plan view of Group 2; Fig.
Figure 4 is a left side view of Figure 2;
Fig. 5 is a right side view of Fig. 2; Fig.
6 is a schematic plan sectional view of a tee-type pipe for explaining a welding method of a Tee-type pipe using the present invention.

Hereinafter, the structure and operation principle of the present invention will be described in detail with reference to the accompanying drawings.

2 is a front view of an overlay welding positioner according to the present invention, Fig. 3 is a plan view of the welding wire 2, Fig. 4 is a left side view of Fig. 2, and Fig. 5 is a right side view of Fig. In the right side view of FIG. 5, the lower end portion of the base frame is omitted for the sake of convenience.

In the following description, for the sake of convenience of description, the directions of the front, rear, left and right and up and down are defined based on FIG.

As shown in the drawing, the overlay welding positioner 100 (hereinafter, simply referred to as a welding positioner) of the present invention basically comprises a base frame 101 installed on a floor surface, a rotating frame 110 rotatably mounted on the base frame 101, A rotating plate 103 rotatably mounted on the rotating frame 102, a first slide block 126 and a second slide block 126 which are provided on both sides of the rotating plate 103 so as to be screwed, 127), and an upper fixing device capable of being raised and lowered on a rotary frame (102) located on the upper portion of the V-block.

The base frame 101 is a metal skeleton having an approximately 'B' shape as a whole, and transmits the load to the ground and supports the entire apparatus.

The rotary frame 102 is rotatably mounted on the base frame 101 and includes a rotary first frame 102a that rotates about a horizontal axis (in a first direction) on the ground and is arranged in the longitudinal direction with respect to the ground, A second frame 102b rotatably connected to the lower end of the first frame 102a in parallel with the ground, and a second frame 102b extending from the upper end of the first frame 102a horizontally And a support table 102c.

The shapes of the base frame 101 and the rotation frame 102 in the illustrated embodiment are merely examples, and the specific shape thereof may be changed or adjusted as needed.

A first direction rotating motor 111 for rotating the rotating frame 102 in a first direction is fixedly attached to the base frame 101 and a motor shaft of the first direction rotating motor 111 is rotatably supported in a first direction The motor gear 112 is shrouded. A first direction rotating gear 113, which is a ring gear formed on the rotating first frame 102a, is engaged with the first direction motor gear 112 to receive rotational power.

A slip ring 114 is provided on the base frame 101 on the upper portion of the first direction rotating motor 111. The slip ring 114 rotates in the second direction And supplies power to the motor 121 without interruption. Since the structure and role of the slip ring 114 are well known in the art, detailed description thereof will be omitted. However, in order to supply power to the first direction rotating motor 111 and the second direction rotating motor 121 by the slip ring 114, the electric cable connected from the outside is not twisted and the rotating frame 102 It has the advantage of being able to rotate infinitely.

On the rotating second frame 102b of the rotating frame 102, the rotating plate 103 is rotatably mounted about an axis perpendicular to the paper (in the second direction). A second direction rotating motor 121 is fixedly mounted to the rotating second frame 102b under the rotating plate 103 and a second direction motor gear 122 is mounted on the motor shaft of the second direction rotating motor 121 It is snowy.

The second direction motor gear 122 meshes with a second direction rotating gear 123, which is a ring gear formed at the lower end of the rotating plate 103, to transmit power for driving the rotating plate 103.

On the rotating plate 103, a total of four sets of V blocks including a pair of slide blocks are provided.

Each of the V block includes a left first slide block 126 and a second slide block 127 positioned opposite to the first slide block 126. The first and second slide blocks 126 and 127 are connected to one width adjusting screw shaft 125, The distance between the two ends becomes narrow or narrow.

That is, on the rotation plate 103, a slide guide 124 for guiding the first and second slide blocks 126 and 127 to the left and right is formed. On the outer circumferential surfaces of both end portions of the width adjusting screw shaft 125, threaded portions 125a of left and right threads are formed.

The first slide block 126 and the second slide block 127 are screwed to both ends of the width adjusting screw shaft 125, respectively. A rotation support body 128 is formed on the rotation plate 103 at a central point in the longitudinal direction of the width adjustment screw shaft 125 to support the rotation of the width adjustment screw shaft 125. A polygonal block 125b may be formed on the outer circumference of the width adjusting screw shaft 125 so that the width adjusting screw shaft 125 can be easily rotated by a tool such as a spanner.

When the diameter or size of the T-shaped pipe or the like to be welded is changed, the operator holds the polygonal block 125b with a spanner or the like and rotates the width adjusting screw shaft 125 in the first direction to rotate the first slide block 126 and the second slide And the blocks 127 are moved relative to each other.

A total of four pairs of the first and second slide blocks 126 and 127 are arranged along the circumferential direction of the rotary plate 103. Each of the V blocks is perpendicular to the first slide block 126 and the second slide block 127, Respectively.

An upper fixing device for pressing and supporting the upper surface of the workpiece 10 is provided on the upper support 102c on the upper portion of the V block.

The upper fixing device includes a lift screw shaft 131 screwed to the upper support 102c and vertically lifted and lowered by screw rotation, an adjustment handle 135 coupled to an upper end of the lift screw shaft 131, A support block 132 coupled to the lower end of the screw shaft 131 and a fixture 133 having a plurality of support blocks 132 formed on the support block 132 to press the workpiece 10 in contact therewith.

The fixture 133 has the shape of a bolt as a whole and includes a shaft portion 133a having a small diameter and a head portion 133b having a diameter enlarged at the lower end of the shaft portion 133a.

An elastic spring 134 is mounted on the outer diameter of the shaft portion 133a between the head portion 133b and the support block 132 so that an impact generated when the upper surface of the workpiece 10 is pressed by the fixture 133 Is to be relaxed.

Hereinafter, a method of welding the inner circumferential surface of the Tee-type pipe using the welding positioner 100 of the present invention will be described with reference to FIG.

First, the workpiece 10 is mounted in a position as shown in FIG. At this time, the rotating plate 103 is rotated so that the workpiece 10 is positioned at the correct position as shown in FIG.

After the workpiece 10 is stably fixed by the upper fixing device and the viblocks, the entire rotating frame 102 is rotated in the first direction and the over welding is performed in the direction of "1" as shown in FIG. 6 .

In this case, the welding can be performed using the articulated welding robot 200 as shown in FIG. 1, and a welding torch 210 is mounted on the end of the final arm of the articulated welding robot 200. The multi-joint welding robot 200 may be a multi-joint robot having six-axis degrees of freedom.

When the welding of the workpiece is completed in the first direction and the inner surface welding in the direction of " 1 "is completed, the rotary plate 103 is rotated 90 degrees counterclockwise (in the second direction) (2) "direction to the welding torch (210) side of the multi-joint welding robot (200).

The entire rotating frame 120 is rotated in the first direction and the inner overlap welding in the "2" direction is performed.

The remaining round connecting portions of the "③" portion and the "④" portion of FIG. 6 rotate the rotating frame 102 and the rotating plate 103 to turn the "③" portion or the "④" And then the welding is performed using the welding torch 210.

In the section where the inner circumferential surface is opened in the process of performing the overlap welding on the inner circumferential surface of the workpiece 10, the sensor attached near the welding torch 210 detects the welding and stops the welding. Over welding is performed in a continuous manner.

The present invention relates to a welding positioner for rapidly and precisely welding welded piping having various shapes and sizes such as Tee-type pipe, cross tube, and reed, and when it is applied in combination with a multi-joint welding robot, And the quality can be improved. Therefore, it is necessary to actively apply in the field of manufacturing various industrial and marine piping facilities.

100: overlay welding positioner 101: base frame
102: rotating frame 102a: rotating first frame
102b: rotating second frame 102c: upper support
103: a rotating plate 111: a first direction rotating motor
112: first direction motor gear 113: first direction rotating gear
114: Slip ring 121: Second-direction rotating motor
122: second direction motor gear 123: second direction rotating gear
124: Slide guide 125: Width adjustment screw shaft
125a: polygonal block 126: first slide block
127: second slide block 128:
131: lift screw shaft 132: support block
133: fixture 133a:
133b: head portion 134: spring
135: Adjustable handle 200: Multi-joint welding robot
210: welding torch

Claims (4)

A base frame (101) installed on the floor;
A rotating frame (102) composed of a rotating first frame (102a) and a rotating second frame (102) provided vertically and mounted on the base frame so as to be rotatable in a first direction;
A first direction rotating motor (111) fixedly mounted on the base frame and transmitting rotational power to rotate the rotating frame in the first direction;
A rotating plate (103) rotatably mounted on the rotating second frame in a second direction;
A second direction rotating motor 121 fixedly attached to the rotating second frame to transmit rotational power to the rotating plate;
A plurality of V blocks including a first slide block (126) and a second slide block (127) mounted on the rotating plate so as to face each other so as to be spaced apart or narrowed by linearly moving left and right; And
A lifting screw shaft 131 rotatably installed on an upper support 102c extending from an upper end of the rotary first frame 102a and having a thread formed on an outer circumferential surface thereof and a support block 132), and a plurality of fasteners (133) mounted on the support block;
And an overlay welded positioner. The method according to claim 1,
A first direction motor gear 112 is supported on a motor shaft of the first direction rotating motor 111 and engaged with a first direction rotating gear 113 fixedly mounted on the rotating first frame 102a,
And a second direction motor gear 122 is disposed on a motor shaft of the second direction rotating motor 121 and meshes with a second direction rotating gear 123 fixedly mounted on the rotating plate 103. [ Positioner. 3. The method according to claim 1 or 2,
The fixture 133 includes a shaft portion 133a and a head portion 133b having an outer diameter larger than that of the shaft portion. An elastic spring 134 is disposed on an outer diameter of a shaft portion between the head portion and the support block 132 Wherein the overlay weld positioner comprises: 3. The method according to claim 1 or 2,
Wherein the plurality of V blocks are arranged on the rotating plate so that four pairs of the V blocks are perpendicular to each other in the circumferential direction.

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