Efficient and precise welding device of large-diameter welding pipe fitting for high-purity crystalline silicon pipeline

Abstract

The utility model belongs to the technical field of welding, and particularly relates to an efficient and precise welding device of a large-diameter welding pipe fitting for a high-purity crystalline silicon pipeline. The temperature difference eliminating assembly comprises two first linear motors installed on the transverse frame, transverse connecting bases are installed at the movable ends of the two first linear motors, second linear motors are fixed to the opposite faces of the two transverse connecting bases, and a vertical plate is fixedly connected between the movable ends of the two second linear motors; two fine adjustment structures are fixed to the end face, close to the pressing ring, of the vertical plate, and two electric heating plates are fixed to the movable ends of the two fine adjustment structures correspondingly. According to the efficient and precise welding device for the large-diameter welding pipe fitting for the high-purity crystalline silicon pipeline, the pipeline is heated through the two electric heating plates, the temperature gradient in the welding process is reduced, generation of thermal stress is reduced, post-heat treatment can help eliminate welding residual stress, the structure and performance of a heat affected zone are improved, and the welding quality is improved. And the influence of a heat affected zone on pipeline welding is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a high-efficiency and precise welding device for large-diameter welding pipe fittings for high-purity crystalline silicon pipelines. Background Art

[0002] In the semiconductor and photovoltaic industries, high-purity silicon pipelines are key components for transporting high-purity silicon materials. The quality of their welding directly impacts the efficiency and product quality of the entire production line. This is especially true for large-diameter welded pipes, where the heat-affected zone (HAZ) during welding becomes a key factor affecting weld quality due to their large size, high material purity, and stringent welding requirements.

[0003] When welding large-diameter pipes using traditional welding methods, uneven heat distribution can easily lead to problems such as structural changes, stress concentration, and cracks in the heat-affected zone. Specifically, the heat-affected zone is exposed to high-temperature heat sources during the welding process, and its microstructure undergoes a series of changes, such as grain growth and phase transformation. These changes directly affect the performance of the welded joint. At the same time, due to the existence of temperature gradients during the welding process, the heat-affected zone will also produce large residual stresses, further reducing the strength and toughness of the welded joint and affecting the welding quality. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the inventors have conducted in-depth research and completed the present utility model after paying a lot of creative work.

[0005] Specifically, the technical problem to be solved by the present invention is to provide a high-efficiency and precision welding device for large-diameter welding fittings for high-purity silicon pipelines, so as to solve the current technical problem that when welding large-diameter pipe fittings, the uneven distribution of welding heat easily leads to structural changes, stress concentration, cracks and other problems in the heat-affected zone.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity crystalline silicon pipelines includes a machine chamber, a three-jaw chuck is rotatably mounted on one side of the machine chamber, and a drive motor for driving the three-jaw chuck to rotate is fixed in the inner cavity of the machine chamber;

[0008] A five-axis robotic arm, with a laser welding gun installed at the end of the robotic arm, and the input end of the laser welding gun is connected to the laser welding machine host;

[0009] Multiple tube carriers are placed in a row on the side of the three-jaw chuck away from the machine chamber, and the multiple tube carriers are arranged in the same row as the machine chamber. Two rollers are rotatably installed on the top of the tube carriers;

[0010] A temperature difference elimination component comprises two linear motors 1 mounted on a horizontal frame, the movable ends of the two linear motors 1 are both mounted with a horizontal connecting seat, a pressure ring is rotatably mounted between one side of the two horizontal connecting seats, linear motors 2 are fixed on opposite surfaces of the two horizontal connecting seats, a vertical plate is fixedly connected between the movable ends of the two linear motors 2, two fine-tuning structures are fixed on one end face of the vertical plate close to the pressure ring, and the movable ends of the two fine-tuning structures are arranged opposite to each other, and two electric heating plates are fixed at the movable ends of the two fine-tuning structures.

[0011] As an improved technical solution, roller frames are slidably installed on both sides of the top of the tube carrier, and the rollers are rotatably installed in the inner cavity of the roller frames. Two slide rails are fixed on the top of the tube carrier, and sliders that slide on the slide rails are installed at both ends of the bottom of the roller frame.

[0012] As an improved technical solution, a bidirectional screw is installed on the tube carrier and located between the two slide rails through a bearing for rotation. A threaded hole is provided on one side of the roller frame for threaded connection with the bidirectional screw. A servo motor for driving the bidirectional screw to rotate is fixed on one side of the tube carrier.

[0013] As an improved technical solution, lugs are integrally formed on all four sides of the pressure ring, and the lugs are arranged in an arc shape on the side away from the pressure ring, and the cross-connecting seat and the lugs are welded together.

[0014] As an improved technical solution, the fine-tuning structure includes a crossbar welded to the vertical plate, a rod frame is fixed to one end of the crossbar away from the vertical plate, and an electric telescopic rod is fixed in the inner cavity of the rod frame.

[0015] As an improved technical solution, an arc-shaped plate is fixedly connected to the movable end of the electric telescopic rod above, and two electric heating plates are respectively fixed on both sides of the inner wall of the arc-shaped plate. A welding channel for the laser welding gun to pass through is opened in the middle of the top of the arc-shaped plate.

[0016] As an improved technical solution, the movable end of the electric telescopic rod at the bottom is fixedly connected to a curved bar, and two electric heating plates are respectively installed at the two ends of the outer wall of the curved bar.

[0017] After adopting the above technical solution, the beneficial effects of the utility model are:

[0018] 1. The utility model adjusts the spacing between the two rollers, and can adapt the spacing between the two rollers to pipes of different diameters, so that it can effectively support pipes of any size; the linear motor drives the pressure ring to move toward the three-jaw chuck, and finally the lug will abut against the end of the No. 2 pipe away from the No. 1 pipe, and the opposite ends of the No. 1 pipe and the No. 2 pipe are in a tight fit, which is used to ensure the welding effect of the laser welding gun between the No. 1 pipe and the No. 2 pipe, and the lateral position of the pressure ring is adjustable, which is suitable for abutting and clamping pipes of different lengths.

[0019] 2. The utility model heats the pipeline through two electric heating plates when welding the pipeline, which plays a role in preheating the required welding area of ​​the pipeline before welding, raising the temperature of the pipeline in advance, reducing the temperature gradient during welding, and reducing the generation of thermal stress. After welding is completed, the pipeline is continued to be heated by the electric heating plates. Post-heat treatment can help eliminate welding residual stress, improve the structure and performance of the heat-affected zone, help improve the crack resistance and overall performance of the pipe fittings, and reduce the impact of the heat-affected zone on pipeline welding.

[0020] 3. The utility model can adjust the distance between the arc plate and the pipe wall by extending and retracting the electric telescopic rod. According to different pipe sizes and pipe wall thicknesses, the distance between the electric heating plate and the pipe wall can be adjusted to ensure that the electric heating plate can effectively and quickly heat pipes of different wall thicknesses and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a high-efficiency and precise welding device for large-diameter welding pipe fittings for high-purity silicon pipelines according to the utility model.

[0023] Figure 2 The utility model is a structural schematic diagram of a tube carrier of a high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines.

[0024] Figure 3 This is a partial structural schematic diagram of a temperature difference elimination component of a high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines according to the present invention.

[0025] Figure 4This is a partial structural schematic diagram of two fine-tuning structures of a high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines according to the utility model.

[0026] Description of reference numerals:

[0027] 1. Machine chamber; 11. Three-jaw chuck; 2. Laser welding gun; 3. Tube holder; 31. Roller frame; 32. Idlers; 33. Bidirectional screw; 34. Servo motor; 4. Temperature difference elimination assembly; 41. Linear motor 1; 42. Linear motor 2; 43. Vertical plate; 44. Press ring; 45. Lug; 46. Fine-tuning structure; 461. Crossbar; 462. Electric telescopic rod; 47. Arc plate; 48. Arc bar; 49. Electric heating plate; 410. Welding channel. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0031] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0032] like Figures 1 to 4As shown together, this embodiment provides a high-efficiency and precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines. This high-efficiency and precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines includes a machine chamber 1, a three-jaw chuck 11 is rotatably mounted on one side of the machine chamber 1, and a drive motor for driving the three-jaw chuck 11 to rotate is fixed in the inner cavity of the machine chamber 1, and the drive end of the drive motor is fixed to the center of the three-jaw chuck 11 near one end surface of the machine chamber 1;

[0033] A five-axis robotic arm is provided with a laser welding gun 2 at the end of the robotic arm, and the input end of the laser welding gun 2 is connected to a laser welding machine host. The five-axis robotic arm, the laser welding machine host and the laser welding gun 2 are all existing mature technologies, so they will not be described in detail. The laser welding gun 2 is in a vertical state with the pipeline.

[0034] Multiple tube carriers 3 are placed in a row on the side of the three-jaw chuck 11 away from the machine chamber 1, and the multiple tube carriers 3 are arranged in the same row as the machine chamber 1. Two rollers 32 are rotatably installed on the top of the tube carriers 3;

[0035] The temperature difference elimination component 4 includes two linear motors 41 installed on the horizontal frame, and multiple tube holders 3 are located between the two linear motors 41. The linear motor 41 drives the pressure ring 44 to move toward the direction of the three-jaw chuck 11, and the lug 45 will eventually come into contact with the end of the No. 2 pipe away from the No. 1 pipe, and make the opposite ends of the No. 1 pipe and the No. 2 pipe in a tight fit, which is used to ensure the welding effect of the laser welding gun 2 on the No. 1 pipe and the No. 2 pipe. The lateral position of the pressure ring 44 is adjustable, which is suitable for contact clamping pipes of different lengths. The two The movable ends of the linear motors 41 are each installed with a cross-connecting seat, a pressure ring 44 is rotatably installed between one side of the two cross-connecting seats, a bearing is fixed on one side of the two cross-connecting seats, and the lug 45 is fixed on the rotating circle of the bearing through a connecting block, and the opposite surfaces of the two cross-connecting seats are fixed with linear motors 42, and a vertical plate 43 is fixedly connected between the movable ends of the two linear motors 42, and two fine-tuning structures 46 are fixed on one end face of the vertical plate 43 close to the pressure ring 44, and the movable ends of the two fine-tuning structures 46 are arranged opposite to each other, and two electric heating plates 49 are fixed at the movable ends of the two fine-tuning structures 46.

[0036] When welding the pipeline, the pipeline is heated by two electric heating plates 49, which serves to preheat the required welding area of ​​the pipeline before welding, increase the temperature of the pipeline in advance, reduce the temperature gradient during welding, and reduce the generation of thermal stress. After welding is completed, the pipeline continues to be heated by the electric heating plates 49. Post-heat treatment can help eliminate welding residual stress, improve the structure and performance of the heat-affected zone, help improve the crack resistance and overall performance of the pipe fittings, and reduce the impact of the heat-affected zone on pipeline welding.

[0037] like Figures 1 to 2 As shown together, in this embodiment, roller frames 31 are slidably installed on both sides of the top of the tube carrier 3, and rollers 32 are rotatably installed in the inner cavity of the roller frames 31. Two slide rails are fixed on the top of the tube carrier 3, and sliders sliding on the slide rails are installed at both ends of the bottom of the roller frame 31.

[0038] like Figures 1 to 2 As shown together, in this embodiment, a bidirectional screw rod 33 is rotatably installed on the tube carrier 3 and located between the two slide rails through a bearing. A threaded hole threadedly connected to the bidirectional screw rod 33 is opened on one side of the roller frame 31. A servo motor 34 for driving the bidirectional screw rod 33 to rotate is fixed on one side of the tube carrier 3. The driving end of the servo motor 34 is connected to one end of the bidirectional screw rod 33. Under the threaded transmission action of the bidirectional screw rod 33 and the threaded hole on the roller frame 31, the spacing between the two roller frames 31 is adjusted, that is, the spacing between the two rollers 32 is adjusted. The spacing between the two rollers 32 can be adaptively adjusted according to pipes of different diameters, so that it can effectively support pipes of any size.

[0039] like Figure 3 As shown, in this embodiment, lugs 45 are integrally formed on all four sides of the pressure ring 44 , and the side of the lug 45 away from the pressure ring 44 is arranged in an arc shape, and the transverse seat and the lug 45 are welded together.

[0040] like Figures 3 and 4 As shown together, in this embodiment, the fine-tuning structure 46 includes a cross bar 461 welded to the vertical plate 43, and a rod frame is fixed to the end of the cross bar 461 away from the vertical plate 43, and an electric telescopic rod 462 is fixed in the inner cavity of the rod frame. The distance between the arc plate 47 and the pipe wall can be adjusted by the extension and retraction of the electric telescopic rod 462. According to different pipe sizes and pipe wall thicknesses, the distance between the electric heating plate 49 and the pipe wall can be adjusted to ensure that the electric heating plate 49 can effectively and quickly heat pipes of different wall thicknesses and different sizes.

[0041] like Figures 3 and 4 As shown together, in this embodiment, an arc-shaped plate 47 is fixedly connected to the movable end of the upper electric telescopic rod 462, and two electric heating plates 49 are respectively fixed on both sides of the inner wall of the arc-shaped plate 47. A welding channel 410 is provided in the middle of the top of the arc-shaped plate 47 for the laser welding gun 2 to pass through.

[0042] like Figures 3 and 4 As shown together, in this embodiment, the movable end of the lower electric telescopic rod 462 is fixedly connected to the arc bar 48, and two electric heating plates 49 are respectively installed at both ends of the outer wall of the arc bar 48.

[0043] During use, the five-axis robot arm removes the laser welding gun 2 from above the tube carrier 3, and then places the No. 1 pipe on a plurality of tube carriers 3 arranged horizontally. The No. 1 pipe is placed between the rollers 32 on both sides, and the end of the pipe close to the machine chamber 1 is clamped and fixed by the three-jaw chuck 11. Then, the No. 2 pipe is placed on the tube carrier 3, and the linear motor 41 drives the pressure ring 44 to move toward the three-jaw chuck 11. Finally, the lug 45 will abut against the end of the No. 2 pipe away from the No. 1 pipe, and the opposite ends of the No. 1 and No. 2 pipes are in a tightly fitted state.

[0044] The vertical plate 43 is driven by the second linear motor 42 to move toward the pressure ring 44, so that the fine-tuning structure 46 located below enters the interior of the pipe. The fine-tuning structure 46 located above moves above the pipe, and the two 56 are moved to the welding area. The upper and lower sets of electric heating plates 49 are turned on to heat the pipe to increase the temperature of the weld of the pipe.

[0045] When the temperature rises, the five-axis robotic arm moves the laser welding gun 2 to the contact end face of pipe No. 1 and pipe No. 2 of the pipeline, so that the laser welding gun 2 and the pipeline are in a vertical state, and the laser welding gun 2 passes through the welding channel 410 to perform contact welding with the pipeline. While welding, the driving motor drives the three-jaw chuck 11 to rotate, thereby driving the pipeline to rotate, and performing 360-degree comprehensive welding around the pipeline.

[0046] It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention. In addition, it should be understood that after reading the technical content of the present invention, those skilled in the art may make various changes, modifications and / or variations to the present invention, and all such equivalent forms also fall within the scope of protection defined by the appended claims of this application.

Claims

1. A high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines, characterized by: It comprises a machine chamber (1), a three-jaw chuck (11) is rotatably mounted on one side of the machine chamber (1), and a driving motor for driving the three-jaw chuck (11) to rotate is fixed in the inner cavity of the machine chamber (1); A five-axis robotic arm, wherein a laser welding gun (2) is mounted at the end of the robotic arm, and an input end of the laser welding gun (2) is connected to a laser welding machine host; A plurality of tube carriers (3), the tube carriers (3) are arranged in a row on a side of the three-jaw chuck (11) away from the machine chamber (1), and the plurality of tube carriers (3) and the machine chamber (1) are arranged in the same row, and two rollers (32) are rotatably mounted on the top of the tube carriers (3); A temperature difference elimination component (4) comprises two linear motors (41) mounted on a horizontal frame, the movable ends of the two linear motors (41) are both mounted with a horizontal connecting seat, a pressure ring (44) is rotatably mounted between one side of the two horizontal connecting seats, linear motors (42) are fixed on opposite surfaces of the two horizontal connecting seats, a vertical plate (43) is fixedly connected between the movable ends of the two linear motors (42), two fine-tuning structures (46) are fixed on one end face of the vertical plate (43) close to the pressure ring (44), and the movable ends of the two fine-tuning structures (46) are arranged oppositely, and two electric heating plates (49) are fixed at the movable ends of the two fine-tuning structures (46).

2. The high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines according to claim 1 is characterized in that: Roller frames (31) are slidably mounted on both sides of the top of the tube carrier (3), and rollers (32) are rotatably mounted in the inner cavity of the roller frames (31). Two slide rails are fixed on the top of the tube carrier (3), and sliders that slide on the slide rails are mounted on both ends of the bottom of the roller frames (31).

3. The high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines according to claim 2 is characterized in that: A bidirectional screw rod (33) is rotatably mounted on the tube carrier (3) and located between the two slide rails via a bearing. A threaded hole threadedly connected to the bidirectional screw rod (33) is provided on one side of the roller frame (31). A servo motor (34) for driving the bidirectional screw rod (33) to rotate is fixed on one side of the tube carrier (3).

4. The high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines according to claim 3 is characterized by: The four sides of the periphery of the pressure ring (44) are all integrally formed with lugs (45), and the side of the lug (45) away from the pressure ring (44) is arranged in an arc shape, and the transverse seat and the lug (45) are welded together.

5. The high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines according to claim 4 is characterized in that: The fine-tuning structure (46) comprises a crossbar (461) welded to a vertical plate (43); a rod frame is fixed to one end of the crossbar (461) away from the vertical plate (43); and an electric telescopic rod (462) is fixed in the inner cavity of the rod frame.

6. The high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines according to claim 5, characterized in that: The movable end of the electric telescopic rod (462) is fixedly connected to the arc plate (47), and two electric heating plates (49) are respectively fixed on both sides of the inner wall of the arc plate (47). A welding channel (410) for the laser welding gun (2) to pass through is opened in the middle of the top of the arc plate (47).

7. The high-efficiency precision welding device for large-diameter welding pipe fittings for high-purity silicon pipelines according to claim 6, characterized in that: The movable end of the electric telescopic rod (462) at the bottom is fixedly connected to an arc strip (48), and two electric heating plates (49) are respectively installed at the two ends of the outer wall of the arc strip (48).

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