A group of spot welding integrated process

Abstract

This application relates to an integrated assembly and spot welding process, belonging to the field of welding technology. The production process includes the following steps: Step 101: A steel pipe alignment device is used to position two steel pipes, keeping their axes aligned, thus forming a weld between them; Step 102: A weld positioning device is used to position the weld between the two steel pipes; Step 103: A laser welding machine is used, with at least two laser welding machines spaced apart around the perimeter of the steel pipes, to weld the weld seam; Step 104: An adjustment device is used to quickly adjust the laser welding machines to the weld seam between the two steel pipes. This application eliminates the need for manual welding, prevents sparks and spatter from posing a safety threat to workers, improves the positioning efficiency of the steel pipes, and thus increases the welding speed.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular to an integrated assembly spot welding process. Background Technology

[0002] Currently, welding technology, also known as joining engineering, is an important material processing technology. Welding is the process of permanently joining workpieces (of the same or different materials) by heating or pressurizing, or both, with or without filler material, to achieve atomic bonding between the materials.

[0003] In the relevant technology, the workers join the ends of two steel pipes together, and then use a welding torch to weld the joint between the two steel pipes. During the welding process, the steel pipes on both sides are rotated, and the joint seam of the steel pipes is welded by rotating the steel pipes.

[0004] Regarding the aforementioned technologies, the inventors believe that the welding of steel pipe ends is all done manually. During manual welding, the sparks sprayed are prone to splashing, posing a threat to worker safety. At the same time, the steel pipe ends cannot be accurately positioned and connected, resulting in a slow welding speed. Summary of the Invention

[0005] To address the issue of slow manual welding speed, this application provides an integrated assembly spot welding process.

[0006] The integrated assembly and spot welding process provided in this application adopts the following technical solution:

[0007] An integrated assembly and spot welding process includes the following steps: Step 101: Steel pipe alignment device, which positions two steel pipes to keep their axes on the same axis, forming a weld between the two steel pipes; Step 102: Weld positioning device, which positions the weld between the two steel pipes; Step 103: Laser welding machine, with at least two laser welding machines spaced apart around the periphery of the steel pipes, which weld the weld between the steel pipes; Step 104: Adjustment device, which quickly adjusts the laser welding machine to the weld between the two steel pipes.

[0008] Optionally, in step 102, the weld positioning device includes a weld measuring device that measures the weld between the two steel pipes.

[0009] Optionally, the weld measuring device is connected to a weld adjustment device, which adjusts the spacing of the weld between the two steel pipes.

[0010] Optionally, in step 104, the adjustment device includes a universal robotic arm, and the laser welding machine is mounted on the universal robotic arm.

[0011] Optionally, a weld point adjuster is installed on the universal robotic arm. The weld point adjuster drives the laser welding machine to perform the following steps on the weld seam: S1: The weld point adjuster drives the laser welding machine to move closer to the axis of the two steel pipes through the universal robotic arm; S2: The laser welding machine welds the two steel pipes close to the inner wall; S3: The universal robotic arm drives the laser welding machine to rotate around the axis of the steel pipes; S4: During the rotation of the laser welding machine, the weld point adjuster drives the laser welding machine to move away from the steel pipes along the radius of the steel pipes; When the laser welding machine welds the two steel pipes, a welding rod is formed between the two steel pipes. The welding rod is arc-shaped, with a welding head at one end and a welding tail at the other end. The welding tail of one welding rod covers the welding head of the other welding rod.

[0012] Optionally, in S1, the end point of the laser welding machine is flush with the surface of the inner wall of the steel pipe.

[0013] Optionally, in step S4, the welding head is spherical, the welding rod cools down slowly from the welding head to the welding tail, and when the welding tail covers the welding head, the laser welding machine is turned off, the universal robotic arm drives the laser welding machine to move away from the steel pipe, and the worker removes the steel pipe.

[0014] Optionally, the spacing between the welds is 0.2-0.5 mm.

[0015] Optionally, after step S4, the worker grinds the surface of the steel pipe weld.

[0016] In summary, this application includes at least one of the following beneficial technical effects of the integrated spot welding process:

[0017] In application, a steel pipe alignment device positions two steel pipes to be welded, aligning their axes on the same horizontal line. Then, a weld seam positioning device positions the weld seam between the two pipes. Afterward, a laser welding machine welds the weld seam. An adjustment device can quickly position the laser welding machine between the two pipes. Setting up at least two laser welding machines can increase the welding speed of the steel pipes exponentially, eliminating the need for manual welding, preventing sparks and spatter from threatening worker safety, and improving the positioning efficiency of the steel pipes, thereby increasing the welding speed. Attached Figure Description

[0018] Figure 1 This embodiment mainly illustrates a process flow diagram of an integrated assembly and spot welding process;

[0019] Figure 2This is a schematic diagram illustrating the main structure of the positioning plate in this embodiment;

[0020] Figure 3 This is a schematic diagram illustrating the main structure of the welding electrode in this embodiment.

[0021] Reference numerals: 1. Positioning plate; 2. Welding rod; 21. Welding head; 22. Welding tail. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains. The use of terms such as "a" or "an" in this patent application specification and claims does not indicate a limitation of quantity, but rather indicates the presence of at least one.

[0024] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0025] This application discloses an integrated assembly spot welding process.

[0026] Reference Figure 1 An integrated assembly and spot welding process includes a steel pipe alignment device, a weld positioning device, a laser welding machine, and an adjustment device. During use, the steel pipe alignment device in step 101 keeps the axes of the two steel pipes on the same axis, the weld positioning device in step 102 positions the weld between the two steel pipes, the laser welding machine in step 103 welds the weld between the steel pipes, and the adjustment device in step 104 adjusts the laser welding machine to be positioned between the two steel pipes.

[0027] The steel pipe alignment device includes positioning plates 1, which are arranged opposite each other. One end of each positioning plate 1 is integrally formed, and the other end extends away from each other, resulting in a V-shaped cross-section. In use, simply place the two steel pipes to be welded between the two positioning plates 1. The V-shaped cross-section of the positioning plates 1 enhances their adaptability. The simple structure of the positioning plates 1 solves the problem of steel pipe positioning. A weld is formed between the two steel pipes on the positioning plates 1.

[0028] Because the steel pipes are of different lengths, the position of the weld between the two steel pipes on the positioning plate 1 is not fixed. The weld positioning device includes a laser emitting strip and a laser receiving strip. The laser emitting strip emits a laser curtain towards the steel pipe. The laser curtain is blocked by the steel pipe, and part of the laser passes through the weld between the two steel pipes. The laser receiving strip receives the laser that passes through the weld, so that the position of the weld is imprinted on the laser receiving strip, which improves the convenience of positioning the weld.

[0029] In actual welding operations, the direction of the weld, and the size of the weld seam, will increase the difficulty of welding and the risk of breakage of the steel pipe later. Generally, the spacing between weld seams is 0.2-0.5mm. Based on the experience of the workers, the preferred spacing is 0.5mm. Adjusting the weld seam to 0.5mm improves the ease of welding the steel pipe. If the workers had to measure the weld seam before each welding operation, it would increase the welding time. The designers have improved the weld seam positioning device by including a weld seam measuring device connected to a laser receiving strip. The weld seam measuring device measures the length of the laser screen projected by the laser emitter onto the laser receiver, thus obtaining the spacing between two weld seams.

[0030] The workers, having obtained the distance between the two welds, also need to adjust the distance between the steel pipes to achieve an optimal 0.5mm. After improvements by the designers, a weld adjustment device is installed on the weld measuring instrument. This device includes a drive cylinder. To save production costs, only one drive cylinder is installed at the end of the steel pipe furthest from the weld. The piston rod of the drive cylinder abuts against one end of the steel pipe, and the drive cylinder is connected to the weld measuring instrument. When the workers place the two steel pipes on the positioning plate 1, they can visually observe and adjust the weld between the two pipes to be slightly greater than 0.5mm. This improves the efficiency of the drive cylinder in adjusting the weld between the two steel pipes. When the weld measuring instrument measures an angle of 0.5mm between the two steel pipes, the drive cylinder stops working.

[0031] The adjustment device includes a slide rail and a omnidirectional robotic arm. The omnidirectional robotic arm is mounted on the slide rail, and the laser welding machine is mounted on the omnidirectional robotic arm. Three laser welding machines are evenly spaced around the circumference of the steel pipe. The designers found that it takes 6 seconds for a single laser welding machine to weld a steel pipe. By setting up three laser welding machines, during use, the omnidirectional robotic arm only needs to drive the laser welding machine to rotate one-third of the circumference of the steel pipe, which can increase the welding speed of a steel pipe to 2 seconds, greatly improving the efficiency of steel pipe welding.

[0032] During use, designers discovered that existing omnidirectional robotic arms typically move the laser welding machine to the side closest to the steel pipe, then rotate it around the pipe's axis. When one laser welding machine moves from one end to the other, the welded steel pipe has three protrusions, affecting the aesthetics of the weld. The designers improved the design by incorporating a weld point adjuster on the omnidirectional robotic arm. This adjuster, through the robotic arm, moves the laser welding machine closer to the axis of the two steel pipes, aligning the laser welding machine's endpoint with the inner wall surface of the two pipes. The laser welding machine then welds the two pipes together. During the welding process of the laser welder on the steel pipe, the adjustment device, through the universal robotic arm, moves the laser welder away from the steel pipe. The adjustment device moves the end point of the laser welder to be flush with the outer wall surface of the steel pipe. A welding rod 2 is formed between the two steel pipes. One end of the welding rod 2 forms a welding head 21, and the other end forms a welding tail 22. The welding head 21 is spherical, with half of it inside the steel pipe and the other half between the two steel pipes, ensuring that the welded rod 2 does not protrude from the outer surface of the steel pipe. The welding tail 22 of one welding rod 2 covers the welding head 21 of another welding rod 2, improving the aesthetics of the weld between the two steel pipes. During the welding process, the three welding rods 2 slowly cool down from the welding head 21 to the welding tail 22. When the welding tail 22 covers the welding head 21, the laser welder is turned off, and the universal robotic arm moves the laser welder away from the steel pipe, allowing the worker to remove the steel pipe.

[0033] After the workers removed the welded steel pipe from the positioning plate 1, they ground the weld joint to further improve the aesthetics of the welded steel pipe.

[0034] The implementation principle of the integrated spot welding process in this application embodiment is as follows: In operation, two steel pipes are placed between V-shaped positioning plates 1. Then, a laser emitting strip emits a laser curtain towards the steel pipes. Part of the laser is blocked by the steel pipes, while the other part passes through the weld between the two steel pipes. A laser receiving strip receives the laser passing through the weld between the two steel pipes. A weld seam measuring device then measures the laser length on the receiving strip. Subsequently, a drive cylinder pushes one side of the steel pipe closer to the other side. When the weld seam length measured by the weld seam measuring device is equal to 0.5mm, the drive cylinder stops working. After adjustment, the laser welder starts working. A universal robotic arm slides the laser welder to the weld seam via a slide rail. The welding point adjuster on the robotic arm drives the laser welding machine to move closer to the axis of the two steel pipes. The end point of the laser welding machine is flush with the inner wall surface of the two steel pipes. Then the laser welding machine welds between the two steel pipes. During the welding process, the adjustment device drives the laser welding machine to move away from the steel pipes through the universal robotic arm. The adjustment device moves the end point of the laser welding machine to be flush with the outer wall surface of the steel pipes. Welding rod 2 is formed between the two steel pipes. The weld tail 22 of one welding rod 2 covers the weld head 21 of the other welding rod 2. When the weld tail 22 covers the weld head 21, the laser welding machine is turned off. Finally, the steel pipe is removed from the positioning plate 1 and the weld is ground.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated assembly and spot welding process, characterized in that, Includes the following steps: Step 101: Use a steel pipe alignment device to position the two steel pipes, keep the axes of the two steel pipes on the same axis, and form a weld between the two steel pipes; Step 102: Use a weld positioning device to position the weld between the two steel pipes; Step 103: Use a laser welding machine to weld the weld seam of the steel pipe, wherein at least two laser welding machines are arranged at intervals around the periphery of the steel pipe; Step 104: Use the adjustment device to quickly adjust the laser welding machine to the weld seam between the two steel pipes; In step 104, the adjustment device includes a universal robotic arm, and the laser welding machine is mounted on the universal robotic arm; The universal robotic arm is equipped with a weld point adjuster. The steps for the weld point adjuster to drive the laser welding machine to weld the seam are as follows: S1: The weld point adjuster drives the laser welding machine to move closer to the axis of the two steel pipes via a universal robotic arm; S2: The laser welding machine welds two steel pipes close to their inner walls; S3: The omnidirectional robotic arm drives the laser welding machine to rotate around the axis of the steel pipe; S4: During the rotation of the laser welding machine, the weld point adjuster drives the laser welding machine away from the steel pipe along the radius of the steel pipe. When the laser welding machine welds two steel pipes, a welding rod (2) is formed between the two steel pipes. The welding rod (2) is arc-shaped. A welding head (21) is formed on one end of the arc-shaped welding rod (2), and a welding tail (22) is formed on the other end. The welding tail (22) on one welding rod (2) covers the welding head (21) of the other welding rod (2).

2. The integrated assembly spot welding process according to claim 1, characterized in that: In step 102, the weld positioning device includes a weld measuring device, which measures the weld between two steel pipes.

3. The integrated assembly spot welding process according to claim 2, characterized in that: The weld measuring device is connected to a weld adjustment device, which adjusts the spacing of the weld between the two steel pipes.

4. The integrated assembly spot welding process according to claim 1, characterized in that: In S1, the end point of the laser welding machine is flush with the surface of the inner wall of the steel pipe.

5. The integrated assembly spot welding process according to claim 1, characterized in that: In step S4, the welding head (21) is spherical in shape. The welding rod (2) cools down slowly from the welding head (21) to the welding tail (22). When the welding tail (22) covers the welding head (21), the laser welding machine is turned off. The universal robotic arm drives the laser welding machine to move away from the steel pipe, and the worker removes the steel pipe.

6. The integrated assembly spot welding process according to claim 1, characterized in that: The spacing between the welds is 0.2-0.5 mm.

7. The integrated assembly spot welding process according to claim 1, characterized in that: After step S4, the workers grind the surface of the steel pipe weld.

Images