Pipe seam laser welding mechanism for stainless steel pipe production

Abstract

The application provides a pipe seam laser welding mechanism for stainless steel pipe production and relates to the technical field of welding processing. Two groups of fixing frames are arranged on the inner side of the frame body, equidistant supporting frames are arranged on the inner side of the fixing frames, control screws are rotatably installed at the bottom of the supporting frames, the control screws are in threaded connection with the fixing frames, each supporting frame can independently move up and down in the fixing frame, when butt welding is performed on the tapered section and the cylindrical section of the stainless steel pipe, the two pipe sections are respectively placed on the supporting frames, the height of each group of supporting frames can be adjusted by rotating the control screws at the bottom of each supporting frame, the supporting frames with different heights are respectively matched with each point of the tapered section of the stainless steel pipe for self-adaptive support, the tapered section welding port can be lifted to the height of the cylindrical section port, the problems that the existing equipment cannot stably support the tapered pipe section and cannot guarantee the coaxial matching of the two pipe sections are solved, and welding defects such as pipe section butt joint misplacement and uneven welds can be avoided.

Description

Technical Field

[0001] This invention relates to the field of welding processing technology, and in particular to a laser welding mechanism for stainless steel pipe production. Background Technology

[0002] Laser welding is a precision welding process that uses a high-energy-density laser beam as a heat source. It uses an optical focusing system to focus the laser beam into a tiny spot, causing the local area of ​​the material to be welded to melt instantly and solidify rapidly, thus forming a weld with metallurgical bonding characteristics. Stainless steel pipes, with their excellent corrosion resistance, structural strength, and cleanliness, are widely used in key fields such as fluid transportation, high-end equipment manufacturing, food and medicine, and nuclear power. The welding quality directly determines the overall sealing performance, structural strength, and long-term service life of the pipeline. Compared with traditional welding methods, intelligent laser welding equipment has become the preferred technology for precision welding of stainless steel pipes due to its technological advantages such as concentrated energy, low heat input, narrow and deep welds, small workpiece deformation, and strong automation adaptability.

[0003] However, there are some shortcomings in the current design of stainless steel tube laser welding equipment: First, the existing welding equipment has an imperfect fixing structure. When welding stainless steel pipes with irregular shapes, especially when completing the butt welding process of tapered and cylindrical sections, the existing fixing structure cannot provide stable and reliable support and positioning for the tapered section of the stainless steel pipe. It is difficult to ensure that the butt joint ends of the tapered and cylindrical sections remain coaxial and tightly fitted, which greatly increases the processing difficulty of butt welding. This can easily lead to quality problems such as welding misalignment and uneven welds.

[0004] Secondly, the existing welding equipment lacks a structure to assist in detecting coaxiality. After the stainless steel pipe butt welding operation is completed, the equipment cannot perform real-time detection of the coaxiality of the two pipe sections. It requires staff to use special testing instruments for manual re-inspection. This detection method not only adds extra processing steps and reduces the overall welding efficiency, but also increases the cost of manpower and equipment, which is not conducive to the integrated production of stainless steel pipe laser welding process. Summary of the Invention

[0005] To address the above problems, one objective of this invention is to overcome these shortcomings, and more specifically, to provide a laser welding mechanism for stainless steel pipe production. This mechanism facilitates the support of cylindrical and conical stainless steel pipes, thereby enabling welding of both. After welding, the coaxiality of the two stainless steel pipe sections can be promptly detected using the structure on the welding equipment, eliminating the need for further subsequent inspections.

[0006] In a first aspect, this invention provides a laser welding mechanism for stainless steel pipe production, specifically comprising: a frame; end slots symmetrically arranged on the front and rear sides of the frame; a movable plate slidably mounted inside the end slots via springs; two sets of side rods symmetrically arranged on the outside of the movable plate; a base frame located at the lower inner end of the movable plate; a pin inserted into the front of the base frame; two sets of fixed frames arranged on the inner side of the frame; vertical guide slots equidistantly arranged on both sides of the fixed frames; symmetrical connecting holes at both ends of the fixed frames, the connecting holes being able to engage with the side rods; support frames equidistantly arranged on the inner side of the fixed frames; control screws rotatably mounted on the bottom of the support frames, the control screws being threadedly connected to the fixed frames; side plates fixedly mounted on both sides of the support frames; guide rails slidably engaged with the guide slots on the outside of the side plates; each support frame being able to move independently up and down within the fixed frames; a lifting rod slidably mounted on the base frame via springs; the lifting rod being located between the two sets of fixed frames; a fixing hole located in the middle of the lifting rod, the fixing hole being able to engage with the pin. Preferably, the left and right sides of the frame are symmetrically provided with rotatable fan-shaped plates, and the upper ends of the left and right sides of the frame are threaded with set bolts.

[0007] Preferably, the two ends of the frame are slidably mounted with a pusher frame through springs. The two sides of the pusher frame are adjacent to the sector plate. After the sector plate rotates in opposite directions, the spring can push the pusher frame to abut against the sector plate. The pusher frame can slide horizontally on the frame. The outside of the pusher frame is fitted with a movable pin, and the pusher frame can abut against the set bolt.

[0008] Preferably, a backing plate is slidably installed inside the pusher frame. The backing plate can move vertically within the pusher frame. Positioning holes are equidistantly arranged on the inner side of the backing plate, and the positioning holes can be engaged with movable pins.

[0009] Preferably, two sets of adjusting plates are slidably installed on both sides of the top of the lifting rod. The adjusting plates can slide vertically on the lifting rod independently, and adjusting screws are rotatably installed on the adjusting plates. The adjusting screws are threadedly connected to the lifting rod.

[0010] Preferably, a contact sensing module is provided at the upper end of the adjustment plate, and an indicator light is provided at the lower end of the adjustment plate. The indicator light is electrically connected to the contact sensing module, and the indicator light will be powered on and illuminate when the contact sensing module comes into contact with an object.

[0011] Preferably, a vertical frame is fixedly installed at the top of the frame, the vertical frame is located between two sets of fixed frames, and the bottom of the vertical frame is adjacent to the lifting rod.

[0012] Preferably, an electric cylinder is installed at the upper end of the support frame, and a laser welding module is installed on the piston rod at the lower end of the electric cylinder.

[0013] 1. In this invention, two sets of fixed frames are symmetrically arranged inside the frame body. V-shaped support frames, driven by control screws and capable of independent lifting, are equidistantly assembled inside the fixed frames. When butt welding the conical and cylindrical stainless steel pipe sections, the two pipe sections are placed on the support frames respectively. By rotating the control screws at the bottom of each support frame individually, the lifting height of each set of support frames can be adjusted to fit and support each point of the conical section of the stainless steel pipe. By using the support frames for multi-point adaptive support, the welding port of the conical section can be raised to the same height as the port of the cylindrical section. This effectively avoids welding defects such as pipe misalignment and uneven welds, reduces the difficulty of welding irregular stainless steel pipes, and thus improves the quality of pipe welding.

[0014] 2. In this invention, a liftable lifting rod is slidably installed on the base frame. Two sets of independently vertically sliding adjustment plates are set at the top of the lifting rod, and a contact sensing module and indicator lights are integrated at the upper end of the adjustment plates. After the stainless steel pipe is welded, the pin is pulled out to release the lifting rod limit, and the spring pushes the lifting rod to move upward. At the same time, the height of the adjustment plate is finely adjusted by adjusting the screw to ensure that the sensing modules on both sides effectively contact the two sections of pipe. The operator only needs to manually rotate the welded pipe and observe the on / off state of the two sets of indicator lights to quickly determine the coaxiality of the pipe. This can realize integrated, real-time, and rapid detection of coaxiality after welding, eliminating the need for secondary re-inspection using special testing instruments, saving additional testing procedures, improving the efficiency of pipe welding quality testing, and reducing testing costs. Attached Figure Description

[0015] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of an embodiment of the present invention is shown.

[0016] Figure 2 A schematic diagram of the split structure of an embodiment of the present invention is shown.

[0017] Figure 3 A schematic diagram of a partial planar cross-section of an embodiment of the present invention is shown.

[0018] Figure 4 A schematic diagram of the connection structure between the frame and the propulsion frame according to an embodiment of the present invention is shown.

[0019] Figure 5 A schematic diagram of the connection structure between the base frame and the lifting rod according to an embodiment of the present invention is shown.

[0020] Figure 6 A schematic diagram of the frame structure according to an embodiment of the present invention is shown.

[0021] Figure 7 A cross-sectional schematic diagram of the fixing frame according to an embodiment of the present invention is shown.

[0022] Figure 8 A three-dimensional structural diagram of the lifting rod according to an embodiment of the present invention is shown.

[0023] List of reference numerals 1. Frame; 101. End slot; 102. Movable plate; 1021. Side rod; 103. Base frame; 1031. Pin; 104. Sector plate; 105. Set bolt; 2. Push frame; 201. Movable pin; 202. Support plate; 2021. Positioning hole; 3. Fixing bracket; 301. Guide groove; 3011. Connecting hole; 302. Support bracket; 3021. Control screw; 303. Side plate; 3031. Guide rail; 4. Lifting rod; 401. Fixing hole; 402. Adjusting plate; 4021. Adjusting screw; 403. Contact sensing module; 404. Indicator light; 5. Frame; 501. Electric cylinder; 502. Laser welding module. Detailed Implementation

[0024] Example 1: Please refer to Figures 1 to 8 As shown: This invention provides a laser welding mechanism for stainless steel pipe production, comprising: a frame 1; symmetrically arranged end grooves 101 on the front and rear sides of the frame 1; a movable plate 102 slidably mounted inside the end grooves 101 via springs; two sets of side rods 1021 symmetrically arranged on the outside of the movable plate 102; a base frame 103 arranged at the lower inner end of the movable plate 102; and pins 1031 inserted into the front of the base frame 103; two sets of fixed frames 3 arranged inside the frame 1; vertical guide grooves 301 equidistantly arranged on both sides of the inside of the fixed frames 3; and symmetrically arranged connecting holes 3011 at both ends of the fixed frames 3, which can be inserted into the side rods 1021. In conjunction with the fixed frame 3, support frames 302 are equidistantly arranged on the inner side of the fixed frame 3. A control screw 3021 is rotatably installed at the bottom of the support frame 302. The control screw 3021 is threadedly connected to the fixed frame 3. Side plates 303 are fixedly installed on both sides of the support frame 302. A guide rail 3031 is provided on the outside of the side plate 303. The guide rail 3031 is slidably engaged with the guide groove 301. Each support frame 302 can move up and down independently within the fixed frame 3. A lifting rod 4 is slidably installed on the base frame 103 through a spring. The lifting rod 4 is located between the two sets of fixed frames 3. A fixing hole 401 is provided in the middle position of the lifting rod 4. The fixing hole 401 is engaged with the pin 1031.

[0025] In this embodiment, fixed frames 3 are installed on both sides of the inner side of the frame 1, and V-shaped support frames 302 driven by control screws 3021 are installed at equal intervals inside the inner fixed frames 3. When it is necessary to weld the tapered section and the cylindrical section of the stainless steel pipe, the two sections are placed on the support frames 302 inside the fixed frames 3 on both sides at the same time. Then, the control screws 3021 on the lower support frame 302 of the tapered section are rotated in sequence, and each set of support frames 302 is raised to different heights and makes contact with the tapered section for support. Through effective support of each point of the tapered section, the part of the tapered section that needs to be welded can be pushed up to the same height as the cylindrical section. In this way, the tapered section and the cylindrical section can be supported in a coaxial position, which facilitates the subsequent welding work.

[0026] As a second embodiment of the present invention, based on the first embodiment, such as Figure 4 and Figure 6As shown, the left and right sides of the frame 1 are symmetrically provided with rotatably mounted sector plates 104, and the upper ends of the left and right sides of the frame 1 are threaded with set bolts 105; the two ends of the frame 1 are slidably mounted with push frames 2 through spring cooperation. The two sides of the push frames 2 are adjacent to the sector plates 104. After the sector plates 104 rotate towards each other, the springs can push the push frames 2 to abut against the sector plates 104, and the push frames 2 can slide horizontally on the frame 1. The outer side of the push frames 2 is fitted with movable pins 201, and the push frames 2 can abut against the set bolts 105; the push... A backing plate 202 is slidably installed inside the frame 2. The backing plate 202 can move vertically within the push frame 2. Positioning holes 2021 are equidistantly arranged on the inner side of the backing plate 202, and the positioning holes 2021 can be inserted and engaged with the movable pin 201. A frame body 1 is provided, on which the upright frame 5 can be installed. An end slot 101 is provided, in which a movable plate 102 can be slidably installed. The movable plate 102 is provided, and by inserting the side rod 1021 on the movable plate 102 into the connecting hole 3011, the fixed frame 3 can be fixed within the frame body 1. A base frame is provided. 103, the lifting rod 4 can be slidably installed on the base frame 103; a pin 1031 is provided, which can limit the lifting rod 4 on the base frame 103 by inserting the pin 1031 into the fixing hole 401; a sector plate 104 is provided, which can limit the push frame 2 on the frame 1 by pressing the push frame 2 against the sector plate 104; a set bolt 105 is provided, which can fix the push frame 2 on the frame 1 by tightening the set bolt 105; the push frame 2 is provided, which can be moved on both sides of the frame 1 to allow the push frame 2 to move. The two sets of stainless steel pipes abut against each other via the abutment plate 202, which facilitates subsequent welding. A movable pin 201 is provided, which can be inserted into the positioning hole 2021 to fix the abutment plate 202 on the pusher frame 2. The abutment plate 202 is provided, and the range of action of the pusher frame 2 can be adjusted by moving the abutment plate 202, so as to be suitable for stainless steel pipes of different sizes. A positioning hole 2021 is provided, which can be inserted into the positioning hole 2021 at different positions to fix the abutment plate 202 on the pusher frame 2 at different heights.

[0027] In this embodiment, the abutment plate 202 is inserted into the pusher frame 2, and then the movable pin 201 is inserted into the positioning hole 2021 at the corresponding height, so that the abutment plate 202 is fixed on the pusher frame 2. After the two stainless steel pipes are placed on the support frame 302 at a coaxial angle, the fan-shaped plate 104 is rotated, and the spring pushes the pusher frame 2 to move, so that the abutment plate 202 contacts the outer side of the stainless steel pipe. Then, the two sets of abutting stainless steel pipes are moved, and the splice of the two sets of stainless steel pipes is adjusted to the center position of the frame 1. Then, the set bolt 105 is tightened to fix the pusher frame 2 on the frame 1. In this way, the two sets of stainless steel pipes can be limited to prevent them from separating.

[0028] As a third embodiment of the present invention, based on embodiment one, such as Figure 8 As shown, two sets of adjusting plates 402 are slidably installed on both sides of the top of the lifting rod 4. Each adjusting plate 402 can slide vertically on the lifting rod 4 independently, and an adjusting screw 4021 is rotatably installed on the adjusting plate 402, which is threadedly connected to the lifting rod 4. A contact sensing module 403 is provided at the upper end of the adjusting plate 402, and an indicator light 404 is provided at the lower end of the adjusting plate 402. The indicator light 404 is electrically connected to the contact sensing module 403, and the contact sensing module 403 interacts with the object... When the object makes contact, the indicator light 404 will be powered on and illuminate; a lifting rod 4 is provided, on which two sets of adjusting plates 402 can be slidably installed; a fixing hole 401 is provided, and the lifting rod 4 can be fixed on the base frame 103 by means of the engagement of the pin 1031 with the fixing hole 401; an adjusting plate 402 is provided, on which a contact sensing module 403 and an indicator light 404 can be installed; an adjusting screw 4021 is provided, which can be used to adjust the height of the two sets of adjusting plates 402 on the lifting rod 4.

[0029] In this embodiment, the lifting rod 4 is slidably installed below the frame 1 via the base frame 103, so that it is exactly at the lower end of the stainless steel pipe welding point. After the stainless steel pipe welding is completed, the pin 1031 is pulled out from the fixing hole 401, causing the spring to push the lifting rod 4 upward until the contact sensing module 403 on the adjusting plate 402 contacts the outer wall of the stainless steel pipe. Then, the adjusting plate 402 is adjusted by the adjusting screw 4021, and the contact sensing modules 403 on the two sets of adjusting plates 402 respectively abut against the stainless steel pipes welded at both ends. Connect the circuit and power on indicator light 404. Then rotate the welded stainless steel tube to make it rotate. Observe the indicator lights 404 on the two sets of adjustment plates 402. If the indicator light 404 on one set of adjustment plates 402 flashes, it means that the contact sensing module 403 and the stainless steel tube have lost contact. This proves that the stainless steel tubes welded at both ends are not coaxial. If the indicator lights 404 on both sets of adjustment plates 402 are constantly lit, it proves that the coaxiality of the stainless steel tubes at both ends is good. This way, you can quickly detect whether the two sets of stainless steel tubes are coaxial.

[0030] In embodiments of the present invention, such as Figure 8 As shown, a support frame 5 is fixedly installed at the top of the frame 1. The support frame 5 is located between two sets of fixed frames 3, and the lower part of the support frame 5 is adjacent to the lifting rod 4. An electric cylinder 501 is installed at the upper end of the support frame 5, and a laser welding module 502 is installed on the piston rod at the lower end of the electric cylinder 501. The support frame 5 is set up so that the electric cylinder 501 can be installed on the support frame 5. The laser welding module 502 is set up so that after the two sets of stainless steel pipes are pushed and joined by the pusher frame 2, the laser welding module 502 can be used to perform laser welding on the splice of the two stainless steel pipes. The electric cylinder 501 is set up so that the feed of the laser welding module 502 can be controlled by the electric cylinder 501.

[0031] The specific usage and function of this embodiment are as follows: In this invention, such as Figures 1 to 8 As shown, the conical and cylindrical stainless steel pipe sections to be welded are placed on the support frames 302 within the two sets of fixed frames 3, respectively. Then, the control screws 3021 at the bottom of the corresponding support frames 302 are rotated to drive the support frames 302 at the corresponding positions to move independently, so that the support frames 302 at different heights respectively fit against the various points supporting the conical stainless steel pipe sections, raising the welding port of the conical section to a state coaxial and flush with the port of the cylindrical section, completing the self-adaptive alignment support of the irregularly shaped pipe, and adjusting the pipe splice to the center position of the frame 1. Then, the frame 1 is rotated to the left. The fan-shaped plates 104 on both sides release the limiting position on the pusher frame 2. The springs at both ends of the frame 1 push the pusher frame 2 to slide horizontally, so that the two abutment plates 202 on both sides respectively abut against the outer sides of the two stainless steel pipes, and keep the two sets of stainless steel pipes in effective contact. Tighten the set bolts 105 at the top of the frame 1 to lock and fix the pusher frame 2 to prevent the pipe from shifting and separating during the welding process. After the pipe is positioned, the welding command and parameters are input into the intelligent laser welding module 502, and the electric cylinder 501 at the top of the stand 5 is started. The piston rod of the electric cylinder 501 drives the laser... The laser welding module 502 descends and then performs laser welding on the joint of the two stainless steel pipes. During the welding process, the operator rotates the stainless steel pipe to complete the circumferential welding of the steel pipe. After the welding is completed, the pin 1031 on the front side of the base frame 103 is pulled out to release the limit on the lifting rod 4. The spring pushes the lifting rod 4 to slide upward, so that the adjusting plates 402 on both sides of the top of the lifting rod 4 move below the pipe welding position. Then, by rotating the adjusting screw 4021, the adjusting plates 402 are vertically finely adjusted so that the upper ends of the two sets of adjusting plates 402 are in contact. The sensing module 403 is attached to the outer wall of the two welded stainless steel pipe sections. At this time, the indicator light 404, which is electrically connected to the contact sensing module 403, is powered on and lights up. The worker manually rotates the welded stainless steel pipe and then observes whether the two sets of indicator lights 404 flash. If the two sets of indicator lights 404 remain constantly lit, it indicates that the contact sensing module 403 has no disconnection with the two pipe sections and the coaxiality meets the welding standard. If either set of indicator lights 404 flashes, it proves that the coaxiality of the two stainless steel pipe sections does not meet the standard after welding and needs to be adjusted.

Claims

1. A laser welding mechanism for stainless steel pipe production, comprising: The frame (1) has symmetrical end slots (101) on its front and rear sides. The end slots (101) are characterized by a movable plate (102) slidably mounted inside by a spring. Two sets of side rods (1021) are symmetrically arranged on the outside of the movable plate (102). A base frame (103) is provided at the lower inner end of the movable plate (102), and a pin (1031) is inserted into the front of the base frame (103). Two sets of fixed frames (3) are provided inside the frame (1). Vertical guide slots (301) are equidistantly arranged on both sides of the fixed frame (3). Connecting holes (3011) are symmetrically arranged at both ends of the fixed frame (3). The connecting holes (3011) can be inserted into the side rods (1021). Equivalent support frames (302) are provided. A control screw (3021) is rotatably installed at the bottom of the support frame (302). The control screw (3021) is threadedly connected to the fixed frame (3). Side plates (303) are fixedly installed on both sides of the support frame (302). A guide rail (3031) is provided on the outside of the side plate (303). The guide rail (3031) is slidably engaged with the guide groove (301). Each support frame (302) can move up and down independently within the fixed frame (3). A lifting rod (4) is slidably installed on the base frame (103) through a spring. The lifting rod (4) is located between the two sets of fixed frames (3). A fixing hole (401) is provided in the middle position of the lifting rod (4). The fixing hole (401) is engaged with the pin (1031).

2. The laser welding mechanism for stainless steel pipe production according to claim 1, characterized in that: The frame (1) has symmetrical fan-shaped plates (104) that are rotatably mounted on the left and right sides, and set bolts (105) are threaded on the upper ends of the left and right sides of the frame (1).

3. The laser welding mechanism for stainless steel pipe production according to claim 2, characterized in that: The two ends of the frame (1) are slidably mounted with a pusher (2) through springs. The pusher (2) is adjacent to the fan-shaped plate (104) on both sides. After the fan-shaped plate (104) rotates in opposite directions, the spring can push the pusher (2) to abut against the fan-shaped plate (104). The pusher (2) can slide horizontally on the frame (1). A movable pin (201) is inserted on the outside of the pusher (2), and the pusher (2) can abut against the set bolt (105).

4. The laser welding mechanism for stainless steel pipe production according to claim 3, characterized in that: The pusher frame (2) has a sliding support plate (202) inside. The support plate (202) can move vertically inside the pusher frame (2). The inner side of the support plate (202) is provided with positioning holes (2021) at equal intervals. The positioning holes (2021) can be inserted and cooperate with the movable pin (201).

5. The laser welding mechanism for stainless steel pipe production according to claim 1, characterized in that: Two sets of adjusting plates (402) are slidably installed on the top two sides of the lifting rod (4). The adjusting plates (402) can slide vertically on the lifting rod (4) independently, and adjusting screws (4021) are rotatably installed on the adjusting plates (402). The adjusting screws (4021) are threadedly connected to the lifting rod (4).

6. The laser welding mechanism for stainless steel pipe production according to claim 5, characterized in that: The upper end of the adjustment plate (402) is provided with a contact sensing module (403), and the lower end of the adjustment plate (402) is provided with an indicator light (404). The indicator light (404) is electrically connected to the contact sensing module (403). When the contact sensing module (403) comes into contact with an object, the indicator light (404) will be powered on and illuminate.

7. The laser welding mechanism for stainless steel pipe production according to claim 1, characterized in that: A support frame (5) is fixedly installed above the frame (1). The support frame (5) is located between two sets of fixed frames (3), and the lower part of the support frame (5) is adjacent to the lifting rod (4).

8. A laser welding mechanism for stainless steel pipe production according to claim 7, characterized in that: An electric cylinder (501) is installed at the upper end of the support frame (5), and a laser welding module (502) is installed on the piston rod at the lower end of the electric cylinder (501).

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