Laser welding apparatus suitable for large diameter pipe

Abstract

To provide a laser welding apparatus suitable for a large-diameter pipe used for welding the large-diameter pipe.SOLUTION: The welding device includes a mounting unit 1, a rotary displacement unit 2, and a welding unit 3. The mounting unit is composed of two semicircular members. The rotary displacement unit comprises a gear. The welding unit includes a welding gun and a fixing base, the welding gun is disposed on the fixing base, and the rotary displacement unit is disposed on the fixing base. A mounting unit is positioned over the first workpiece. A second workpiece is brought into contact with the first workpiece. The rotary displacement unit drives the welding unit, and the rotary displacement unit and the welding unit weld the pipe while rotating in the circumferential direction on the arcuate rack of the mounting unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention belongs to the technical field of laser welding and relates to a laser welding apparatus suitable for large diameter pipes. [Background technology]

[0002] A conventional laser welding machine 9 uses laser energy to perform welding. Figure 8 shows the "Automatic Auxiliary Welding Device" of Taiwan Patent No. TW202346015A. This conventional laser welding machine 9 uses a laser oscillator to form a light beam, which is expanded, reflected, and focused before being irradiated onto the surface of a workpiece 91. The surface heat generated by the irradiation melts the workpiece through thermal conduction, and the laser welding of the workpiece 91 is achieved by the specific melt spot formed.

[0003] However, the conventional laser welding machine 9 uses a connecting rod assembly structure 92 for connection to the laser welding machine 9, and the connecting rod assembly structure 92 moves up and down or back and forth and left and right, resulting in spatial positional and angular changes. In addition, a laser gun 93 is connected to the end of the connecting rod assembly structure 92, and when the connecting rod assembly structure 92 moves, it affects the laser gun 93, causing the laser gun 93 to shake during welding, which can reduce welding accuracy or cause the welding position to shift. In addition, the conventional laser welding machine 9 is not suitable for large-diameter pipes.

[0004] Furthermore, with conventional laser welding machines 9, as the size of the workpiece 91 increases, the size of the laser welding machine 9 also increases, which increases costs in terms of manufacturing, transportation, and installation space, and therefore improvements are needed for practical use. Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above-mentioned problems present in conventional laser welding machines, the inventors of the present invention have developed a laser welding apparatus suitable for large-diameter pipes. A primary object of the present invention is to provide a laser welding apparatus suitable for large-diameter pipes used in large-diameter pipe welding. Another object of the present invention is to provide a laser welding apparatus suitable for large-diameter pipes that are easy to process. Another object of the present invention is to provide a laser welding apparatus suitable for large-diameter pipes that has low manufacturing costs. [Means for solving the problem]

[0006] The present invention provides a laser welding apparatus suitable for large diameter pipes, comprising: an attachment unit, a rotation displacement unit, and a welding unit, wherein the attachment unit comprises two semicircular members that can be integrally connected to each other, and two arc-shaped racks are disposed on the two semicircular members; The rotary displacement unit includes a motor, a gear connected to the motor, and the gear is installed to connect to the two arc-shaped racks of the mounting unit; the welding unit includes a welding gun and a fixed base, the welding gun is installed to connect to the fixed base, the rotary displacement unit is installed on the fixed base, the mounting unit is attached by hanging on a first workpiece, and a second workpiece is arranged to abut against the first workpiece; the rotary displacement unit drives the welding unit in conjunction with each other, and the rotary displacement unit and the welding unit rotate circularly on the two arc-shaped racks of the mounting unit, so that the welding unit welds the first workpiece and the second workpiece.

[0007] Two locking members are provided at the connection points of the two semicircular members of the mounting unit, and the two semicircular members form a closed circular shape with the two locking members, and the two semicircular members are fixed so that they are hooked onto the first workpiece and positioned on the first workpiece.

[0008] A first guide groove is provided on one of two opposite side surfaces of the two semicircular members of the mounting unit, and a second guide groove is provided on the other side surface of the two semicircular members.

[0009] A first guide pillar and a second guide pillar are provided on the fixed base of the welding unit, the first guide pillar corresponds to the first guide grooves of the two semicircular members, and the second guide pillar corresponds to the second guide grooves of the two semicircular members.

[0010] The motor is mounted on a fixed base of the welding unit.

[0011] The rotation displacement unit rotates the welding unit once around the center point of the two semicircular members of the mounting unit, and the welding unit performs welding work while rotating.

[0012] The apparatus includes two bracket assembly structures, which are respectively installed below the first workpiece and the second workpiece.

[0013] The bracket assembly structure includes four prisms and a frame base, and a rotating wheel is installed on the top of the four prisms.

[0014] A welding gun of the welding unit is directed toward the connection point between the first workpiece and the second workpiece. [Effects of the Invention]

[0015] The present invention has the following advantages due to the above-mentioned solution.

[0016] 1. The device of the present invention uses an attachment unit to attach a welding unit to a first workpiece, then brings a second workpiece close to the end face of the first workpiece until it abuts against the end face of the first workpiece, and then operates the rotational displacement unit to rotate the welding unit around a center point, so that welding is performed while the welding unit is rotating and moving, thereby realizing welding of large-diameter pipes.

[0017] 2. The device of the present invention has an attachment unit divided into two semicircular members, and the attachment unit is fixed to the pipe surface of the first workpiece using the two locking members. After that, the welding unit is simply attached to the attachment unit together with the rotation displacement unit, thereby completing the attachment. Therefore, the device of the present invention has excellent mobility and is easy to assemble.

[0018] 3. The device of the present invention simplifies the welding unit, mounting unit, and rotation displacement unit, and can be externally mounted on the surface of the first workpiece as an external structure, and can be directly removed after the welding operation is completed, thereby reducing the manufacturing cost. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a conceptual diagram of the three-dimensional structure of a laser welding apparatus suitable for large-diameter pipes according to the present invention. [Figure 2] 1 is an exploded view of the three-dimensional structure of a laser welding apparatus suitable for large-diameter pipes according to the present invention. [Figure 3] FIG. 2 is a structural conceptual diagram showing the external mounting unit of the present invention installed on the first workpiece. [Figure 4] FIG. 2 is a structural conceptual diagram showing a state in which a second workpiece of the present invention is in contact with a first workpiece. [Figure 5] 1 is a cross-sectional view of a laser welding apparatus suitable for large-diameter pipes according to the present invention. [Figure 6] FIG. 6 is a structural conceptual diagram of the present invention in the X direction of FIG. 5. [Figure 7] FIG. 4 is a structural conceptual diagram showing the displacement of the welding unit of the present invention. [Figure 8] FIG. 1 is a conceptual diagram of the structure of a conventional laser welding machine. DETAILED DESCRIPTION OF THE INVENTION

[0020] The present invention relates to a laser welding apparatus suitable for large diameter pipes, and the laser welding apparatus A performs end face welding of a first workpiece 51 and a second workpiece 52, and comprises a mounting unit 1, a rotation displacement unit 2, a welding unit 3, and two bracket assembly structures 4. The structure of the present invention will be described in detail below with reference to the drawings.

[0021] 1 and 2, the mounting unit 1 is composed of two semicircular members 11, and two locking members 111 are provided between the two semicircular members 11, allowing the two semicircular members 11 to form a closed circular shape. A first guide groove 112 is provided on one of two opposite side surfaces of the two semicircular members 11, and a second guide groove 113 is provided on the other side surface of the two semicircular members 11. The two semicircular members 11 are attached by hanging them on the first workpiece 51, and an arc-shaped rack 13 is disposed inside the two semicircular members 11.

[0022] 1 and 2, the rotational displacement unit 2 further includes a gear 21 and a motor 22. The gear 21 is installed so as to connect to the arc-shaped rack 13 of the mounting unit 1, and the gear 21 is connected to an output end 221 provided on the motor 22.

[0023] 1 and 2, the welding unit 3 includes a welding gun 31 and a fixed base 32. The motor 22 of the rotation displacement unit 2 is installed to be connected to the fixed base 32. The welding gun 31 is directed toward the connection point between the first workpiece 51 and the second workpiece 52. The fixed base 32 is provided with a first guide pillar 321 and a second guide pillar 322. The first guide pillar 321 corresponds to the first guide groove 112 of the two semicircular members 11, and the second guide pillar 322 corresponds to the second guide groove 113 of the two semicircular members 11.

[0024] As shown in Figures 1 and 2, the two bracket assembly structures 4 are installed so as to connect to the underside of the first workpiece 51 and the second workpiece 52, respectively, and the bracket assembly structure 4 consists of four rectangular pillars 41 and a frame base 43, and a rotating wheel 42 is provided on the top of the four rectangular pillars 41.

[0025] In a preferred embodiment of the laser welding apparatus suitable for large-diameter pipes according to the present invention, the first workpiece 51 and the second workpiece 52 are respectively mounted on the two bracket assembly structures 4, as shown in FIGS. 2 to 4. The first workpiece 51 and the second workpiece 52 are, for example, 50 cm in diameter (outer diameter) of the pipe. The rotating wheels 42 of the four rectangular columns 41 serve as four fulcrums to support and secure the surfaces of the first workpiece 51 and the second workpiece 52. The two semicircular members 11 of the mounting unit 1 are opened and positioned to surround the outer periphery of the first workpiece 51. Then, the first guide column 321 and the second guide column 322 of the fixing table 32 are inserted into the first guide groove 112 and the second guide groove 113 of the two semicircular members 11. Finally, the arc-shaped rack 13 and the gear 21 are meshed with each other. This allows the two semicircular members 11 to be fixed together using the two locking members 111.

[0026] 5 to 7, the welding gun 31 of the welding unit 3 is aimed at the connection point between the first workpiece 51 and the second workpiece 52. The operator then operates the welding unit 3, causing the output end 221 of the motor 22 to rotate clockwise, rotating the gear 21, which then engages and moves on the arc-shaped rack 13. This causes the welding unit 3 to rotate around the center point 12 of the two semicircular members 11, welding the first workpiece 51 and the second workpiece 52. When the welding unit 3 completes one rotation, the welding is completed. The output end 221 of the motor 22 then rotates counterclockwise, returning the welding unit 3 to its original position before operation and waiting. This prevents the electric wire from becoming tangled in the first workpiece 51. Finally, the worker removes the welding unit 3, the mounting unit 1, and the rotation displacement unit 2 from the first workpiece 51. Note that while the welding unit 3 is rotating, the first guide pillar 321 and the second guide pillar 322 move while being inserted into the first guide groove 112 and the second guide groove 113, so that the shaking caused by the rotation of the welding unit 3 can be stabilized, and poor welding can be prevented.

[0027] As described above, the present invention provides a laser welding apparatus suitable for large diameter pipes, the structure of which has not been disclosed in publications or made publicly available via telecommunications lines, and therefore meets the requirements for a patent.

[0028] It should be noted that the above content is the technical principles adopted in the specific embodiments of the present invention, and if any changes or improvements are made in accordance with the detailed description of the present invention, all such changes or improvements are included in the scope of the claims of the present invention. [Explanation of symbols]

[0029] A: Laser welding equipment 1: Mounting unit 11: Semicircular member 111: Locking member 112: First guide groove 113: Second guide groove 12: Center point 13: Arc-shaped rack 2: Rotation displacement unit 21: Gear 22: Motor 221: Output terminal 3: Welding unit 31: Welding gun 32:Fixed stand 321: First guide pillar 322: Second guide pillar 4: Bracket assembly structure 41: Prismatic 42: Rotating Wheel 43: Frame Base 51: First workpiece 52: Second workpiece [Prior art] 9: Conventional laser welding machine 91: Workpiece 92: Connecting rod assembly structure 93: Laser Gun

Claims

1. A laser welding apparatus suitable for large diameter pipes, comprising: a mounting unit; a rotational displacement unit; and a welding unit; the mounting unit includes two semicircular members that can be integrally connected to each other, and two arc-shaped racks are disposed on the two semicircular members; the rotation displacement unit includes a motor, a gear connected to the motor, and the gear is installed to connect to the two arc-shaped racks of the mounting unit; the welding unit includes a welding gun and a fixed base, the welding gun is installed to be connected to the fixed base, and the rotation displacement unit is installed to be connected to the fixed base; a mounting unit that is mounted on a first workpiece, a second workpiece that is positioned to abut against the first workpiece, the rotational displacement unit that drives the welding unit in conjunction with the first workpiece, and the rotational displacement unit and the welding unit that rotate circularly on the two arc-shaped racks of the mounting unit, thereby causing the welding unit to weld the first workpiece and the second workpiece together.

2. 2. The laser welding device suitable for large diameter pipes according to claim 1, characterized in that two locking members are provided at the connection points of the two semicircular members of the mounting unit, the two semicircular members form a closed circular shape by the two locking members, and the two semicircular members are hooked onto the first workpiece and fixed so as to be positioned on the first workpiece.

3. 2. The laser welding device suitable for large diameter pipes according to claim 1, wherein a first guide groove is provided on one of two opposite side surfaces of the two semicircular members of the mounting unit, and a second guide groove is provided on the other side.

4. 4. The laser welding device suitable for large diameter pipes according to claim 3, characterized in that a first guide pillar and a second guide pillar are provided on a fixed base of the welding unit, the first guide pillar corresponding to the first guide grooves of the two semicircular members, and the second guide pillar corresponding to the second guide grooves of the two semicircular members.

5. 5. The laser welding apparatus suitable for large diameter pipes according to claim 1 or claim 4, wherein the motor is installed on a fixed base of the welding unit.

6. 6. The laser welding device suitable for large diameter pipes according to claim 5, characterized in that the rotational displacement unit rotates the welding unit once around the center point of the two semicircular members of the mounting unit, and the welding unit performs welding work while rotating.

7. The laser welding apparatus suitable for large diameter pipes according to any one of claims 1 to 4, characterized in that it comprises two bracket assembly structures, and the two bracket assembly structures are respectively installed below the first workpiece and the second workpiece.

8. The laser welding device suitable for large diameter pipes as claimed in claim 7, characterized in that the bracket assembly structure comprises four prisms and a frame base, and a rotating wheel is installed on the top of the four prisms.

9. 2. The laser welding apparatus suitable for large diameter pipes according to claim 1, wherein a welding gun of said welding unit is directed toward a connection point between said first workpiece and said second workpiece.

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