Laser welding device for welding steel pipes

Abstract

The invention discloses a laser welding device for welding a steel pipe. The laser welding device comprises a machine base, a welding part and an adjusting mechanism. The welding part is installed at the top of the machine base. Two limiting pieces are further arranged in the welding area of the machine base, in the using process, the position of the steel pipe is limited through the limiting pieces, and subsequent welding machining is conducted; the adjusting mechanism is composed of a driving part, an angle assembly, a pressing assembly and a locking assembly. Wherein the angle assembly is arranged on the inner side of the machine base, and the whole angle assembly is fixedly arranged below the limiting piece; according to the invention, by additionally arranging the step positioning adjusting mechanism, the clamp square block can be directly, rapidly and accurately locked at common special angles such as 10 degrees, 20 degrees, 30 degrees and 60 degrees, rapid setting and reliable locking of multiple special angles are realized, the design accurately adapts to the special angles, and an operator can obtain a reference angle without replacing the clamp.

Description

Technical Field

[0001] This invention belongs to the field of laser welding technology, and specifically relates to a laser welding device for welding steel pipes. Background Technology

[0002] Laser welding equipment is an advanced device that uses a high-energy-density laser beam to achieve efficient and precise joining of steel pipes. By focusing the laser beam, a localized high-temperature heat source is formed in the jointing area of ​​the steel pipes, causing the material to melt instantly and form a uniform molten pool. After cooling, a permanent joint is achieved. This device is mainly used for welding thin-walled or medium-thick-walled pipes such as stainless steel pipes, carbon steel pipes, and alloy pipes.

[0003] In existing laser welding processes for steel pipes, aligning and clamping the square tubes to be welded is a crucial and tedious preparatory step. Currently used clamping systems have several significant limitations. First, in terms of functionality, they are often rigid and limited. For joints requiring welding at specific angles (such as 10°, 20°, 30°, and 60°), the operating unit often needs to prepare a complete set of dedicated fixed-angle clamps for the corresponding angle. This not only means high initial purchase costs but also creates a burden of storing, managing, and frequently replacing clamps on the production floor, greatly restricting production flexibility. When encountering non-standard angles or requiring fine-tuning, operators have to rely on manually adjustable general-purpose clamps. However, the locking mechanism of existing clamps is often separate from the angle adjustment mechanism. After roughly adjusting to the required angle, operators need to use additional tools or actions to lock the clamps. This two-step or even multi-step operation is not only inefficient, but more importantly, the force generated during locking may unintentionally disturb the already aligned angle, causing a slight change in the preset angle and directly resulting in welding quality defects. Summary of the Invention

[0004] The purpose of this invention is to provide a laser welding device for welding steel pipes, so as to solve the problems mentioned in the background art, such as the cumbersome angle adjustment of existing steel pipe welding fixtures and the tendency for misalignment during locking, which affect quality and efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a laser welding device for welding steel pipes, the laser welding device comprising a base, a welding section and an adjustment mechanism;

[0006] The welding section is installed at the top of the machine base;

[0007] Two limiting components are also provided in the welding area of ​​the base. During use, the position of the steel pipe is limited by the limiting components and subsequent welding processing is carried out.

[0008] The adjustment mechanism consists of a driving component, an angle component, a pressing component, and a locking component;

[0009] in:

[0010] The angle component is placed inside the base and is fixedly mounted below the limiting member.

[0011] The pressing component has a rotating part and a pressing part; the rotating part is located directly below the angle component, while the pressing part passes through the limiting member, and the bottom end of the pressing part is connected to the rotating part in a transmission manner.

[0012] The driving component is located on one side of the angle assembly. When the driving component is in the pressed state, it engages with the rotating part, and when the driving component is not pressed, it engages with the angle assembly, thereby switching the angle and pressed state of the limiting component.

[0013] The locking component is positioned between the drive component and the angle component, and the locking component is always engaged with the angle component;

[0014] The locking component is partially attached to the drive member in the unpressed state and rotates synchronously with the angle component. When the drive member is in the pressed state, the locking component self-locks and restricts its circumferential rotation.

[0015] As a preferred technical solution of the present invention, the limiting member is an adjusting block, which has a square hole at the center of its top end and a screw hole through the bottom end face of the square hole.

[0016] As a preferred technical solution of the present invention, the angle component includes a bottom toothed ring and a connecting cylinder;

[0017] The connecting cylinder is fixed to the bottom end of the adjusting block, and the connecting cylinder extends through to the bottom inner side of the machine base;

[0018] The bottom toothed ring is fixed at the bottom end face of the connecting cylinder. The bottom toothed ring is coaxial with the connecting cylinder, and a hole with the same inner diameter as the connecting cylinder is opened at the center of the bottom toothed ring.

[0019] As a preferred technical solution of the present invention, the pressing component includes a pressure plate, a connecting rod, and an adjusting gear plate;

[0020] The pressure plate is positioned above the adjusting block, and at least one end of the pressure plate extends to the outside of the adjusting block;

[0021] The connecting rod is composed of a square column and a screw section spliced ​​together. The top of the square column is fixed to the pressure plate, and the four sides of the square column fit into the square hole. The screw section is threadedly connected to the screw hole opened on the bottom end face of the square hole.

[0022] The adjusting gear plate is located directly below the bottom gear ring; the bottom of the screw part passes through the connecting cylinder and the bottom gear ring in sequence to the adjusting gear plate, and the screw part is threadedly connected to the adjusting gear plate.

[0023] As a preferred technical solution of the present invention, the base is composed of a base and a placement platform installed on the top of the base; the bottom end surface of the adjustment block is in contact with the top end surface of the placement platform;

[0024] The welding section consists of a three-axis slide table mounted on a placement platform and a welding torch mounted on the three-axis slide table.

[0025] The bottom surface of the placement platform is also fixed with a limiting frame, which is in the shape of an inverted "F". The upper and lower end faces of the adjusting gear plate are inserted into the groove of the limiting frame itself, and the two are in close contact. Therefore, the upper and lower positions of the adjusting gear plate will not change, and it can only rotate in the circumferential direction. In order to avoid motion interference, the limiting frame will not contact the adjusting gear plate, the bottom gear ring, or the transmission gear plate.

[0026] As a preferred technical solution of the present invention, the driving member includes a driving part and an output part that meshes with it;

[0027] The output section includes a transmission gear plate, a pin, and a spring.

[0028] The first pin passes through the axis of the transmission gear disk, so the transmission gear disk rotates around the axis of the first pin. The spring is sleeved on the first pin, and the two ends of the spring abut against the transmission gear disk and the bottom part of the transmission gear disk, respectively. It should be noted that the bottom end of the first pin is the limiting end, which can support the spring. At the same time, its diameter is larger than the hole diameter of the transmission gear disk itself. During installation, the transmission gear disk should be placed and installed from the top of the first pin.

[0029] When the pin is not pressed down, it engages with the bottom tooth ring, and when the pin is pressed down, it separates from the bottom tooth ring and engages with the adjusting tooth disc.

[0030] As a preferred technical solution of the present invention, the driving unit includes a driving gear and a shaft handwheel fixed at the center of the top of the driving gear, with the top of the shaft handwheel positioned above the placement platform.

[0031] The top edge of the drive gear has a protruding overlapping edge that always overlaps the transmission gear. Therefore, when the handwheel with shaft is pressed, the overlapping edge squeezes the transmission gear, forcing the transmission gear to compress the spring, thus lowering the transmission gear. When the handwheel with shaft is no longer squeezed, the spring force can lift the transmission gear and the entire drive unit. Therefore, the spring's rebound force should be greater than the weight of the transmission gear and the entire drive unit. During pressing, only a slight force is needed to make the spring's rebound force less than the weight of the transmission gear and the entire drive unit. Therefore, the spring force needs to be calculated. Of course, in mass production, a pressure spring can also be fitted on the shaft of the handwheel with shaft, with both ends of the pressure spring abutting against the handwheel part of the handwheel with shaft and the placement platform, respectively. By setting two elastic structures, the requirement for spring elasticity can be reduced.

[0032] As a preferred technical solution of the present invention, the locking assembly includes a second pin and a locking toothed ring;

[0033] The top end of the second pin is fixed to the bottom end surface of the placement platform, and a spline protrusion is also fixed on the outer wall of the bottom area of ​​the second pin.

[0034] The locking toothed ring is sleeved on the second pin, and the inner wall of the locking toothed ring is provided with a spline groove that matches the spline protrusion.

[0035] When the transmission gear plate is not pressed down, the locking tooth ring part overlaps on the transmission gear plate and meshes with the bottom tooth ring part. When the transmission gear plate is pressed down, the spline groove engages with the spline protrusion, and the locking tooth ring is fully engaged with the bottom tooth ring. Therefore, when the transmission gear plate moves down, the locking tooth ring will descend under the action of gravity, causing its spline groove to engage with the spline protrusion. At this time, the locking tooth ring no longer rotates circumferentially, thereby limiting the bottom tooth ring. Since the bottom tooth ring is fixed to the connecting cylinder, and the connecting cylinder is... The adjustment block is fixed to the adjustment block, so that the adjustment block will no longer rotate after the angle is adjusted, thus ensuring that the angle is fixed. The transmission gear plate after being pressed down will drive the adjustment gear plate to rotate. The adjustment gear plate can only rotate circumferentially and cannot rise or fall, so it drives the screw part to descend. Since the square column and the square hole are fitted together, the entire connecting rod will not rotate. Therefore, when the adjustment gear plate rotates, it will drive the connecting rod and the pressure plate to descend as a whole, so that the pressure plate clamps the steel pipe placed on the placement table and performs subsequent laser welding.

[0036] As a preferred technical solution of the present invention, a limiting ring is also fixed on the connecting cylinder. The limiting ring abuts against the bottom end face of the placement platform. By setting the limiting ring, it can be ensured that the adjusting block will not move up and down, and the angle adjustment of the adjusting block and the subsequent pressure limiting of the steel pipe can be carried out normally. In the early stage of installation, the connecting cylinder is first passed through the placement platform, and then the limiting ring and the bottom tooth ring are welded in sequence.

[0037] As a preferred technical solution of the present invention, the number of teeth of the transmission gear disk is equal to the number of teeth of the bottom gear ring, and the number of teeth of the bottom gear ring is an integer multiple of the number of spline grooves. That is, when the locking gear ring is driven by the bottom gear ring, its minimum possible rotation angle is , the angle between adjacent slots of the spline groove is , and is an integer multiple of . Because the number of teeth of the bottom gear ring is an integer multiple of the number of spline grooves, when the bottom gear ring stops after rotating any number of "teeth", the position of the spline groove can always be aligned with the spline protrusion on the second pin.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] In this invention, by adding a stepped positioning adjustment mechanism, the clamp block can be directly and quickly locked precisely at commonly used special angles such as 10°, 20°, 30°, and 60°, realizing rapid setting and reliable locking of multiple special angles. This design accurately adapts to special angles, and operators can obtain a reference angle without changing the clamp. After the angle is set, its advantages are further reflected in stability and efficiency. By continuing to press the same adjustment mechanism, the pressure plate can be driven to move down, applying a uniform and stable clamping force to the square tube. This mechanical linkage locking method is integrated with the angle positioning mechanism, ensuring that the set angle will not be destroyed during the locking process, greatly improving efficiency. This invention simplifies the multiple discrete steps of "rough positioning, manual fine adjustment, temporary fixing, and final locking" in the traditional process into two consecutive and intuitive operation actions: "rotating the angle and pressing to lock". This greatly shortens the preparation and adjustment time before welding, reduces the dependence on operator skills, and significantly improves the standardization of operations and product qualification rate in mass production. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of a laser welding device used for welding steel pipes.

[0041] Figure 2 A bottom view of a laser welding apparatus used for welding steel pipes;

[0042] Figure 3 for Figure 1 Sectional view at point DD;

[0043] Figure 4 for Figure 3 Enlarged view of region A in the middle;

[0044] Figure 5 This is a schematic diagram of the adjustment mechanism;

[0045] Figure 6 This is a schematic diagram showing the meshing state of the locking assembly with the bottom gear ring and the transmission gear plate.

[0046] Figure 7 This is a schematic diagram of the locking assembly.

[0047] Figure 8 This is a structural diagram of the pressure plate and connecting rod.

[0048] In the picture:

[0049] 100. Base;

[0050] 101. Base; 102. Placement platform; 103. Limiting bracket;

[0051] 200. Welding section;

[0052] 201. Three-axis slide table; 202. Welding torch;

[0053] 301. Adjusting block;

[0054] 301a, square hole; 301b, bottom toothed ring; 301d, limiting ring piece; 301e, connecting cylinder;

[0055] 302, pressure plate;

[0056] 303. Connecting rod;

[0057] 303a, square column; 303b, screw section;

[0058] 304. Adjust the gear plate;

[0059] 401. Handwheel with axle;

[0060] 402, drive gear; 402a, overlapping edge;

[0061] 403. Transmission gear plate; 404. Pin 1; 405. Spring;

[0062] 500. Locking assembly;

[0063] 501, Pin 2; 501a, Spline protrusion;

[0064] 502, locking gear ring; 502a, spline groove. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] Please see Figures 1 to 8The present invention provides a technical solution: a laser welding device for welding steel pipes, the laser welding device including a base 100, a welding part 200 and an adjustment mechanism;

[0067] The welding part 200 is installed at the top of the base 100;

[0068] Two limiting components are also provided in the welding area of ​​the base 100. During use, the position of the steel pipe is limited by the limiting components and subsequent welding processing is carried out.

[0069] The adjustment mechanism consists of a drive component, an angle assembly, a pressing assembly, and a locking assembly 500;

[0070] in:

[0071] The angle assembly is placed inside the base 100 and is fixedly mounted below the limiting member;

[0072] The pressing component has a rotating part and a pressing part; the rotating part is located directly below the angle component, while the pressing part passes through the limiting member, and the bottom end of the pressing part is connected to the rotating part in a driving connection.

[0073] The driving component is located on one side of the angle assembly. When the driving component is in the pressed state, it engages with the rotating part, and when the driving component is not pressed, it engages with the angle assembly, thereby switching the angle and pressed state of the limiting component.

[0074] The locking component 500 is positioned between the drive component and the angle component, and the locking component 500 is always engaged with the angle component;

[0075] The locking component 500 is partially attached to the drive component in the unpressed state and rotates synchronously with the angle component. When the drive component is in the pressed state, the locking component 500 self-locks and restricts its circumferential rotation.

[0076] In this embodiment, refer to Figure 4 and Figure 6 The limiting component is an adjusting block 301. The adjusting block 301 has a square hole 301a at the center of its top end, and a screw hole is provided through the bottom end face of the square hole 301a. The screw hole is not shown in the figure.

[0077] In this embodiment, refer to Figure 4 , Figure 5 , Figure 6 The angle assembly includes a bottom toothed ring 301b and a connecting cylinder 301e;

[0078] The connecting cylinder 301e is fixed at the bottom end of the adjusting block 301, and the connecting cylinder 301e extends through to the bottom inner side of the base 100;

[0079] The bottom toothed ring 301b is fixed at the bottom end face of the connecting cylinder 301e. The bottom toothed ring 301b is coaxial with the connecting cylinder 301e, and a hole with the same inner diameter as the connecting cylinder 301e is opened at the center of the bottom toothed ring 301b.

[0080] In this embodiment, refer to Figure 4 and Figure 5 The pressing assembly includes a pressure plate 302, a connecting rod 303, and an adjusting gear 304;

[0081] The pressure plate 302 is positioned above the adjusting block 301, and at least one end of the pressure plate 302 extends to the outside of the adjusting block 301;

[0082] Reference Figure 8 The connecting rod 303 is composed of a square column 303a and a screw part 303b spliced ​​together. The top of the square column 303a is fixed to the pressure plate 302, and the four sides of the square column 303a are fitted with the square hole 301a. The screw part 303b is threadedly connected to the screw hole opened on the bottom end face of the square hole 301a.

[0083] The adjusting gear 304 is located directly below the bottom gear ring 301b; the bottom of the screw part 303b passes through the connecting cylinder 301e and the bottom gear ring 301b in sequence to the adjusting gear 304, and the screw part 303b is threadedly connected to the adjusting gear 304.

[0084] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The base 100 consists of a base 101 and a placement platform 102 mounted on top of the base 101; the bottom surface of the adjusting block 301 is in contact with the top surface of the placement platform 102.

[0085] The welding section 200 consists of a three-axis slide 201 mounted on the placement table 102 and a welding torch 202 mounted on the three-axis slide 201.

[0086] A limiting frame 103 is also fixed to the bottom surface of the placement platform 102. The limiting frame 103 is in the shape of an inverted "F". The upper and lower end faces of the adjusting gear 304 are inserted into the groove of the limiting frame 103 itself, and the two are in close contact. Therefore, the upper and lower positions of the adjusting gear 304 will not change, and it can only rotate in the circumferential direction. In order to avoid motion interference, the limiting frame 103 will not contact the adjusting gear 304, the bottom gear ring 301b, or the transmission gear 403.

[0087] In this embodiment, refer to Figure 4 , Figure 5 , Figure 6 The driving component includes a driving part and an output part that meshes with it;

[0088] The output section includes a transmission gear 403, a pin 404, and a spring 405.

[0089] Pin 404 passes through the axis of the transmission gear 403, so the transmission gear 403 rotates around the axis of pin 404. Spring 405 is sleeved on pin 404, and the two ends of spring 405 abut against the transmission gear 403 and the bottom part of the transmission gear 403, respectively. It should be noted that the bottom end of pin 404 is the limiting end, which can support spring 405. At the same time, its diameter is larger than the hole diameter of the transmission gear 403 itself. During installation, the transmission gear 403 should be placed and installed from the top of pin 404.

[0090] When the pin 404 is not pressed down, it engages with the bottom gear ring 301b. When the pin 404 is pressed down, it disengages from the bottom gear ring 301b and engages with the adjusting gear plate 304.

[0091] In this embodiment, refer to Figure 4 and Figure 5 The drive unit includes a drive gear 402 and a shaft handwheel 401 fixed at the center of the top of the drive gear 402. The top of the shaft handwheel 401 is positioned above the placement platform 102.

[0092] A protruding overlapping edge 402a is formed at the top edge of the drive gear 402. This overlapping edge 402a always overlaps the transmission gear 403. Therefore, when the handwheel 401 is pressed, the overlapping edge 402a compresses the transmission gear 403, forcing the transmission gear 403 to compress the spring 405, thereby lowering the transmission gear 403. When the handwheel 401 is no longer compressed, the spring force of the spring 405 can lift the transmission gear 403 and the entire drive unit. Therefore, the rebound force of the spring 405 should... When the force is greater than the weight of the transmission gear 403 and the entire drive unit, and only a slight force is needed during pressing, the rebound force of the spring 405 is less than the weight of the transmission gear 403 and the entire drive unit. Therefore, it is necessary to calculate the elastic force of the spring 405. Of course, in mass production, a pressure spring can also be fitted on the shaft of the handwheel 401 with shaft, and the two ends of the pressure spring abut against the handwheel part of the handwheel 401 with shaft and the placement platform 102 respectively. By setting two elastic structures, the elasticity requirement of the spring 405 can be reduced.

[0093] In this embodiment, refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 The locking assembly 500 includes a second pin 501 and a locking toothed ring 502;

[0094] The top end of the second pin 501 is fixed on the bottom end surface of the placement platform 102, and a spline protrusion 501a is also fixed on the outer wall of the bottom area of ​​the second pin 501.

[0095] The locking ring 502 is sleeved on the second pin 501, and the inner wall of the locking ring 502 is provided with a spline groove 502a that matches the spline protrusion 501a;

[0096] When the transmission gear disk 403 is not pressed down, the locking gear ring 502 partially overlaps the transmission gear disk 403 and partially meshes with the bottom gear ring 301b. When the transmission gear disk 403 is pressed down, the spline groove 502a engages with the spline protrusion 501a, and the locking gear ring 502 fully meshes with the bottom gear ring 301b. Therefore, when the transmission gear disk 403 moves down, the locking gear ring 502 will descend under the action of gravity, causing its spline groove 502a to engage with the spline protrusion 501a. At this time, the locking gear ring 502 no longer rotates circumferentially, thereby limiting the bottom gear ring 301b. Since the bottom gear ring 301b is fixed to the connecting cylinder 301e, and the connecting cylinder... 301e is fixed to the adjusting block 301, so that the adjusting block 301 will no longer rotate after the angle is adjusted, ensuring that the angle is fixed. The transmission gear 403 after being pressed down will drive the adjusting gear 304 to rotate. The adjusting gear 304 can only rotate circumferentially and cannot rise or fall, so it drives the screw part 303b to fall. Since the square column 303a and the square hole 301a are in a fitted shape, the entire connecting rod 303 will not rotate. Therefore, when the adjusting gear 304 rotates, it will drive the connecting rod 303 and the pressure plate 302 to fall as a whole, so that the pressure plate 302 clamps the steel pipe placed on the placement table 102 and performs subsequent laser welding.

[0097] In this embodiment, refer to Figure 5 The connecting cylinder 301e is also fixed with a limiting ring 301d, which abuts against the bottom end face of the placement platform 102. By setting the limiting ring 301d, it can be ensured that the adjusting block 301 will not move up and down, and the angle adjustment of the adjusting block 301 and the subsequent pressure limit of the steel pipe can be carried out normally. In the early stage of installation, the connecting cylinder 301e is first passed through the placement platform 102, and then the limiting ring 301d and the bottom tooth ring 301b are welded in sequence.

[0098] In this embodiment, the number of teeth on the transmission gear 403 is equal to the number of teeth on the bottom gear ring 301b. The number of teeth on the bottom gear ring 301b is an integer multiple of the number of spline grooves 502a. That is, when the locking gear ring 502 is driven by the bottom gear ring 301b, its minimum possible rotation angle is α, and the angle between adjacent slots of the spline groove 502a is β. Therefore, α is an integer multiple of β. Since the number of teeth on the bottom gear ring 301b is an integer multiple of the number of spline grooves 502a, when the bottom gear ring 301b stops after rotating through any number of "teeth", the position of the spline groove 502a can always be aligned with the spline protrusion 501a on the second pin 501.

[0099] The following describes the workflow of the laser welding equipment:

[0100] During the welding of the square steel pipe, the angle of the adjusting block 301 is adjusted according to the required angle for welding. First, the handwheel 401 with shaft is rotated. At this time, the driving component is in an unpressed state. The transmission gear 403 meshes with the bottom gear ring 301b. When the handwheel 401 with shaft rotates, it drives the bottom gear ring 301b and the connecting cylinder 301e to rotate synchronously. At this time, the connecting rod 303 is threadedly connected to the screw hole of the square hole 301a, and the adjusting gear 304 is threadedly connected to the screw part 303b. Therefore, the adjusting gear 304, the connecting rod 303, and the pressure plate 302 will also rotate synchronously. The synchronously rotating pressure plate 302 can always be perpendicular to the clamped square steel pipe, which is convenient for subsequent pressing and limiting. When the adjusting block 301 rotates to the required angle, it stops rotating. During the entire angle adjustment process, the locking component 500 is partially attached to the driving component and rotates synchronously with the bottom gear ring 301b.

[0101] After the angle of the adjusting block 301 is adjusted to the correct position, the handwheel 401 with shaft is pressed down. At this time, the transmission gear plate 403 separates from the bottom gear ring 301b. Simultaneously, the driving component is pressed down, causing the locking gear ring 502 to descend under gravity and engage with the spline protrusion 501a, thus self-locking and preventing the locking assembly 500 from rotating circumferentially. Since the locking assembly 500 is engaged with the bottom gear ring 301b, the bottom gear ring 301b is locked, thus fixing the angle of the adjusting block 301. After the transmission gear plate 403 is pressed down, it engages with the adjusting gear plate 304, driving the adjusting gear plate 304 to rotate. The adjusting gear plate 304 can only rotate circumferentially and cannot rise or fall. When the adjusting gear plate 304 rotates, the screw part 303b descends, thereby driving the square column 303a and the pressure plate 302 to descend. After the pressure plate 302 descends, it clamps the square steel pipe placed on the placement platform 102, and then the handwheel 401 with shaft is released for subsequent welding.

[0102] During welding, the position is adjusted by the three-axis slide table 201 and laser welding is performed by the welding torch 202. After welding is completed, the handwheel 401 with shaft is pressed down and the entire pressing assembly is moved up to release the square steel tube. Then the handwheel 401 with shaft is no longer pressed down. The drive component rises under the action of the elastic component, separates from the pressing assembly, and re-engages with the angle assembly. The locking assembly 500 also rises, releases the self-locking, and allows angle adjustment.

[0103] Although embodiments of the invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser welding apparatus for welding a steel pipe, characterized by: The laser welding device comprises a base (100), a welding part (200) and an adjusting mechanism; The welding part (200) is installed at the top of the base (100); Two limiting parts are arranged at the welding area of the base (100); The adjusting mechanism comprises a driving part, an angle component, a pressing component and a locking component (500); Wherein: The angle component is arranged inside the base (100) and is integrally arranged below the limiting part; The pressing component has a rotating part and a pressing part; the rotating part is arranged directly below the angle component, and the pressing part penetrates through the limiting part, and the bottom end of the pressing part is in transmission connection with the rotating part; The driving part is arranged at one side of the angle component; when the driving part is in the pressing state, it is in engagement with the rotating part, and when the driving part is not in the pressing state, it is in engagement with the angle component; The locking component (500) is arranged between the driving part and the angle component; the locking component (500) is always in engagement with the angle component; The locking component (500) is partially overlapped on the driving part in the non-pressing state, and rotates synchronously with the angle component; when the driving part is in the pressing state, the locking component (500) is self-locked and limits the circumferential rotation thereof.

2. A laser welding apparatus for welding a steel pipe according to claim 1, characterized by: The limiting part is an adjusting block (301); a square hole (301a) is arranged at the top center position of the adjusting block (301) downward; a screw hole is arranged through the bottom end surface of the square hole (301a).

3. A laser welding apparatus for welding a steel pipe according to claim 2, characterized by: The angle component comprises a bottom tooth ring (301b) and a connecting cylinder (301e); The connecting cylinder (301e) is fixedly arranged at the bottom end of the adjusting block (301), and penetrates into the bottom inside of the base (100); The bottom tooth ring (301b) is fixedly arranged at the bottom end surface of the connecting cylinder (301e); the bottom tooth ring (301b) and the connecting cylinder (301e) are coaxially arranged, and a hole with the same inner diameter as the connecting cylinder (301e) is arranged at the center position of the bottom tooth ring (301b).

4. A laser welding apparatus for welding a steel pipe according to claim 3, characterized in that: The pressing component comprises a pressing plate (302), a connecting rod (303) and an adjusting tooth disc (304); The pressing plate (302) is arranged above the adjusting block (301), and at least one end of the pressing plate (302) extends to the outside of the adjusting block (301); The connecting rod (303) is composed of a square column (303a) and a screw rod part (303b) which are arranged in sequence; the top end of the square column (303a) is fixed with the pressing plate (302), and the periphery of the square column (303a) is in contact with the square hole (301a); the screw rod part (303b) is in screw connection with the screw hole arranged at the bottom end surface of the square hole (301a); The adjusting tooth disc (304) is arranged directly below the bottom tooth ring (301b); the screw rod part (303b) penetrates through the connecting cylinder (301e), the bottom tooth ring (301b) and the adjusting tooth disc (304) in sequence, and is in screw connection with the adjusting tooth disc (304).

5. A laser welding apparatus for welding a steel pipe according to claim 4, characterized in that: The base (101) and the placing table (102) installed on the top of the base (101) constitute the base (100); the bottom end surface of the adjusting block (301) is attached to the top end surface of the placing table (102); The welding part (200) is composed of a three-axis sliding table (201) installed on the placing table (102) and a welding gun (202) loaded on the three-axis sliding table (201); The bottom end surface of the placing table (102) is further provided with a limiting frame (103) in the shape of an inverted "F"; the upper and lower end surfaces of the adjusting tooth disc (304) are clamped into the slots of the limiting frame (103), and the two are attached.

6. A laser welding apparatus for welding a steel pipe according to claim 5, characterized by: The driving part includes a driving tooth disc (402) and a shaft handle (401) fixed at the top center of the driving tooth disc (402); the top of the shaft handle (401) is above the placing table (102); The top edge of the driving tooth disc (402) is provided with an outwardly protruding overlapping eave (402a) that is always clamped on the transmission tooth disc (403). The locking assembly (500) includes a pin shaft (501) and a clamping tooth ring (502); The top end of the pin shaft (501) is fixed on the bottom end surface of the placing table (102), and a spline protrusion (501a) is further fixed on the outer wall of the bottom region of the pin shaft (501); 7. A laser welding apparatus for welding a steel pipe according to claim 6, characterized by: The clamping tooth ring (502) is sleeved on the pin shaft (501), and the inner wall of the clamping tooth ring (502) is provided with a spline groove (502a) matched with the spline protrusion (501a); When the transmission tooth disc (403) is not pressed, the clamping tooth ring (502) is partially clamped on the transmission tooth disc (403) and partially engaged with the bottom tooth ring (301b); when the transmission tooth disc (403) is pressed, the spline groove (502a) is engaged with the spline protrusion (501a), and the clamping tooth ring (502) is completely engaged with the bottom tooth ring (301b).

8. A laser welding apparatus for welding a steel pipe according to claim 6, characterized by: The connecting cylinder (301e) is further provided with a limiting ring piece (301d) abutting against the bottom end surface of the placing table (102). The number of teeth of the transmission tooth disc (403) is equal to the number of teeth of the bottom tooth ring (301b), and the number of teeth of the bottom tooth ring (301b) is an integer multiple of the number of spline grooves (502a). ​ ​ 9. A laser welding apparatus for welding a steel pipe according to claim 5, characterized in that: ​ 10. A laser welding apparatus for welding a steel pipe according to claim 8, characterized by: ​

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