Automatic welding device for intersecting line of pipe fitting

Abstract

According to the automatic welding device for the pipe fitting intersecting lines, the pitching angle of the end of a second pipe can be adjusted, meanwhile, the second pipe can rotate, the device can adapt to various intersecting line forms, the angle of the second pipe can be flexibly adjusted according to the intersecting line shapes, angles and sizes of different workpieces, and the welding efficiency is improved. Orthogonal or oblique-crossing welding of the first pipe and the second pipe is achieved, the universality and applicability of the device are improved, and meanwhile the welding quality and the strength of a welding seam are improved.

Description

Technical Field

[0001] The present invention relates to the field of welding, and particularly to an automatic welding device for the intersection line of pipe fittings. Background Art

[0002] The intersection line refers to the intersection line formed on the surface when two pipe fittings intersect. The intersection line is usually a closed space curve and is also the dividing line between the surfaces of the two pipe fittings. The weld seam generated by intersection line welding is a typical weld seam form in the fields of mechanical manufacturing, pressure vessel manufacturing, pipeline installation, etc. Due to the non-planar space curve characteristics of the intersection line, automatic intersection line welding is an efficient and precise welding method.

[0003] The automatic intersection line welding device mainly consists of a welding power source, a mechanical motion system, a control system, a welding sensor, and a welding fixture. However, the commonly used intersection line welding device can only be applicable to the intersection line welding at a specific angle. If it is necessary to weld the intersection line of obliquely intersecting cylinders at different angles, it is necessary to replace the fixtures at different angles, which increases the cost of the fixtures and the management difficulty.

[0004] In summary, how to achieve automatic welding of two orthogonally or obliquely intersecting pipe fittings has become an urgent problem to be solved by researchers in this field. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: how to achieve automatic welding of two orthogonally or obliquely intersecting pipe fittings.

[0006] To solve the above technical problem, the technical solution adopted by the present invention is as follows:

[0007] The present invention is an automatic welding device for the intersection line of pipe fittings, including: a base; a welding machine body fixed on the base; a robotic arm, one end of which is arranged on the top of the welding body, and the other end of which is provided with an inner support assembly for fixing the first pipe and a welding torch movably arranged; a lifting frame, which is arranged on one side of the base in a lifting manner; a first U-shaped frame, both ends of which are rotatably connected to the inner walls on both sides of the lifting frame, and one end of the second pipe is supported on the first U-shaped frame; a second U-shaped frame, which is arranged on the other side of the base, and the other end of the second pipe is supported on the second U-shaped frame; two support frames, the two ends of the first U-shaped frame horizontally extend outwards to be provided with the support frames; a fixed ring seat, the other ends of the two support frames are fixedly connected to the fixed ring seat; a rotating ring seat, which is rotatably arranged inside the fixed ring seat and is coaxially arranged with the fixed ring seat, and is driven by a motor fixed on the fixed ring seat to rotate; a plurality of fixed clamps, which are fixed on the inner wall of the rotating ring seat. When the end of the second pipe is located inside the rotating ring seat, the fixed clamps clamp the end of the second pipe.

[0008] Further, universal ball bearings that contact the outer wall of the second pipe are provided on both the first U-shaped frame and the second U-shaped frame.

[0009] Further, a fixing plate body is provided on one side of the base, and vertical columns are provided on both sides of the plate body; the lifting frame is slidably arranged on the columns; a lifting screw column is vertically and rotatably arranged on the plate body, and its top abuts against the bottom of the lifting frame.

[0010] Further, a sliding groove is opened on the other side of the base; a sliding seat is slidably located in the sliding groove; the second U-shaped frame is rotatably arranged in the sliding seat; a translation screw column passes through the other side of the base and connects the end to the sliding seat.

[0011] Further, the robotic arm includes a plurality of joints connected in sequence, and the joints are controlled and adjusted by motors; a rotary module is provided at the end joint of the robotic arm, a linear module is provided at the movable end of the rotary module, the fixed end at the bottom of the linear module is connected to the inner support assembly, and the movable end of the linear module is connected to the welding torch.

[0012] Advantages of the present invention: The present invention is an automatic welding device for the intersection line of pipe fittings. By means of this device, the elevation angle of the end of the second pipe can be adjusted, and at the same time, the second pipe can rotate, enabling the device to adapt to various intersection line forms, and being able to flexibly adjust the angle of the second pipe according to the intersection line shape, angle, and size of different workpieces, improving the versatility and applicability of the device, and enhancing the welding quality and the strength of the weld seam. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the drawings and embodiments.

[0014] Figure 1 is a schematic structural diagram of the present invention;

[0015] Figure 2 is a detailed view of the first U-shaped frame and the second U-shaped frame;

[0016] Figure 3 is a detailed view of the robotic arm. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will now be further described in detail with reference to the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0018] In order to achieve the automatic welding of two pipe fittings in orthogonal or skew intersection, the following embodiments are provided in this application;

[0019] As Figure 1-2 shown, this embodiment is an automatic welding device for the intersection line of pipe fittings, asFigure 1 As shown in the figure, the device includes a base 1. The welding machine body 2 is arranged on the base and is located at the rear side of the base 1. The robotic arm 3 is arranged on the welding machine body 2. An inner support mechanism 4 and a welding torch 5 are arranged at the end of the robotic arm 3. The robotic arm 3 extends the inner support mechanism 4 into the first pipe. The outer diameter of the inner support mechanism 4 expands and then cooperates with the inner wall of the first pipe to realize the fixation of the inner support mechanism and the vertically arranged first pipe. The welding torch 5 can perform circumferential movement around the axis of the first pipe and linear movement along the axis of the first pipe.

[0020] A first U-shaped frame 7 is respectively arranged on the left side of the base 1, and a second U-shaped frame 6 is arranged on the right side. The first U-shaped frame 7 and the second U-shaped frame 6 are used to support the horizontal second pipe. The first U-shaped frame 7 is rotatably arranged on the lifting frame 71. The first U-shaped frame 7 horizontally extends to the left and is provided with a support frame 72. The support frame 72 is used to fix the fixing ring seat 73. A rotating ring seat 74 is arranged on the right side of the fixing ring seat 73. The motor is fixed on the left side of the fixing ring seat 73. The motor is used to drive the rotation of the rotating ring seat 74. A fixing fixture 75 is arranged on the peripheral wall of the rotating ring seat 74. In this way, the second pipe is supported on the first U-shaped frame 7 and the second U-shaped frame 6. The end of the second pipe is located inside the rotating ring seat 74, and the end of the second pipe and the rotating ring seat 71 are fixedly connected through the fixing fixture 75. Starting the motor realizes the self-rotation of the second pipe.

[0021] During the welding process, when the first pipe and the second pipe need to be orthogonally welded, the inner support assembly 4 is adjusted to the vertical state. In this way, the fixed first pipe is in the vertical state, and the first U-shaped frame 7 and the second U-shaped frame 6 are at the same height. In this way, the fixed second pipe is in the horizontal state. At this time, rotate the second pipe to adjust the circumferential position of the second pipe. After the intersection line of the second pipe matches the intersection line of the first pipe, the welding torch 5 performs lifting and rotational movement around the first pipe to realize the automatic welding of the first pipe and the second pipe.

[0022] During the welding process, when the first pipe and the second pipe need to be obliquely welded, after the inner support assembly 4 is fixed to the first pipe, the first pipe is adjusted to a set angle through the robotic arm 3. Adjust the up and down height of the first U-shaped frame 7, and arrange the first U-shaped frame 7 and the second U-shaped frame 6 vertically. In this way, the second pipe is arranged obliquely. After the end of the second pipe is also fixed to the rotating ring seat 74, the circumferential rotation of the second pipe is realized. After the intersection line of the second pipe matches the intersection line of the first pipe, the welding torch performs lifting and rotational movement around the first pipe to realize the automatic welding of the first pipe and the second pipe.

[0023] It should be noted that when the second pipe is obliquely supported on the first U-shaped frame 7 and the second U-shaped frame 6, the first U-shaped frame 7 and the second U-shaped frame 6 tilt along with the first pipe, rather than the first U-shaped frame 7 and the second U-shaped frame 6 being in the vertical state.

[0024] Such as Figure 2As shown, in some possible embodiments, universal ball bearings 76 that contact the outer wall of the second pipe are provided on both the first U-shaped frame 7 and the second U-shaped frame 6.

[0025] In this embodiment, in order to make the rotation of the second pipe smoother, universal ball bearings 76 are provided on the first U-shaped frame 7 and the second U-shaped frame 6 to achieve rolling friction between the first U-shaped frame 7, the second U-shaped frame 6 and the second pipe.

[0026] As Figure 2 shown, in some possible embodiments, a fixed plate body 77 is provided on one side of the base 1, and vertical columns 78 are provided on both sides of the plate body 77; the lifting frame 71 is slidably arranged on the columns 78; a lifting screw column 79 is vertically rotatably arranged on the plate body 77, and its top abuts against the bottom of the lifting frame 71.

[0027] In this embodiment, the plate body 77 is located at the left bottom of the base 1, columns 78 are provided on both sides of the base at the position of the plate body 77, the lifting frame 71 is slidably arranged on the columns 78, and by rotating the lifting screw column 79, the lifting of the lifting frame 71 is realized, and thus the lifting of the first U-shaped frame 7 is realized.

[0028] As Figure 2 shown, in some possible embodiments, a chute 61 is opened on the other side of the base 1; a sliding seat 62 is slidably located in the chute 61; the second U-shaped frame 6 is rotatably arranged in the sliding seat 62; a translation screw column 63 passes through the other side of the base 1 and connects the end to the sliding seat 62.

[0029] In this embodiment, in order to adapt to the welding of second pipes with different axial lengths, the right end portion of the second pipe is supported on the second U-shaped frame 6. By rotating the translation screw column 63, the left and right movement of the sliding seat 62 is realized. The second U-shaped frame 6 is rotatably arranged in the sliding seat 62. When the axial length of the second pipe is shorter, the sliding seat 62 is moved to the left, shortening the distance between the first U-shaped frame 7 and the second U-shaped frame 6.

[0030] As Figure 3 shown, in some possible embodiments, the robotic arm 3 includes a plurality of joints 31 connected in sequence, and the joints 31 are controlled and adjusted by motors; a slewing module 8 is provided at the end joint of the robotic arm 3, a linear module 9 is provided at the movable end of the slewing module 8, the bottom fixed end of the linear module 9 is connected with the inner support assembly 4, and the movable end of the linear module 9 is connected with the welding torch 5;

[0031] The multi-joint adjustment on the robotic arm through motors is a conventional technique and will not be elaborated in this embodiment. The rotary assembly can drive the welding torch to move around the axis of the first pipe, and the linear module realizes the linear movement of the welding torch along the first axis. In this way, the automatic welding of the intersection line between the two pipe bodies is achieved through the coordinated cooperation of the rotary assembly and the linear module.

[0032] Finally, it should be noted that the inner support assembly is a conventional technical means, including a fixed end, and a plurality of clamping pieces located on the outer peripheral wall of the fixed end controlled by hydraulic pressure. By moving the clamping pieces closer to or away from the outer peripheral wall of the fixed end, the fixed connection to the first pipe is realized.

[0033] Taking the above ideal embodiment based on the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. Automatic welding device for pipe intersection line, characterized in that: include: Base; A welding machine body, which is fixed on the base; A mechanical arm, one end of which is arranged on the top of the welding body, and the other end of which is provided with an inner support assembly for fixing the first tube and a welding gun movably arranged; A lifting frame, which is arranged on one side of the base; A first U-shaped frame, both ends of which are rotatably connected to the inner walls of both sides of the lifting frame, and one end of the second tube is supported on the first U-shaped frame; A second U-shaped frame, which is arranged on the other side of the base, and the other end of the second tube is supported on the second U-shaped frame; Two support frames, wherein the two ends of the first U-shaped frame are horizontally extended outwardly to be provided with the support frames; A fixed ring seat, the other ends of the two support frames are fixedly connected to the fixed ring seat; A rotating ring seat is rotatably arranged inside the fixed ring seat and coaxially arranged with the fixed ring seat, and is driven to rotate by a motor fixed on the fixed ring seat; A plurality of fixing clamps are fixed on the inner wall of the rotating ring seat. When the end of the second tube is located in the rotating ring seat, the fixing clamps clamp the end of the second tube.

2. The automatic welding device for pipe intersection lines according to claim 1 is characterized in that: The first U-shaped frame and the second U-shaped frame are both provided with universal balls in contact with the outer wall of the second tube.

3. The automatic welding device for pipe intersection lines according to claim 1 is characterized in that: A plate body is fixed on one side of the base, and vertical columns are arranged on both sides of the plate body; The lifting frame is slidably arranged on the column; The lifting stud is vertically rotatably arranged on the plate body, and the top of the lifting stud abuts against the bottom of the lifting frame.

4. The automatic welding device for pipe intersection lines according to claim 1 is characterized in that: A slide groove is provided on the other side of the base; the sliding seat is slidably located in the slide groove; the second U-shaped frame is rotatably arranged in the sliding seat; the translation stud passes through the other side of the base and connects the end thereof with the sliding seat.

5. The automatic welding device for pipe intersection lines according to claim 1 is characterized in that: The mechanical arm comprises a plurality of joints connected in sequence, and the joints are controlled and adjusted by motors; A rotary module is arranged at the end joint of the robot arm, a linear module is arranged at the movable end of the rotary module, the bottom fixed end of the linear module is connected to the inner support assembly, and the movable end of the linear module is connected to the welding gun.

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