A kind of auxiliary welding device for linear motor machining

Abstract

The application discloses a kind of auxiliary welding devices for linear motor machining, belong to welding auxiliary equipment field, including pedestal, chuck rotationally connected in the upper end of pedestal, top pressure assembly fixed in the upper end of pedestal;The upper end of the pedestal is also fixed with auxiliary alignment assembly, the auxiliary alignment assembly includes multiple second frame bodies fixed in the upper end of pedestal, hollow ring seat is fixed with the upper end of multiple second frame bodies and is located above chuck, three elastic adjusting parts are slidably arranged in the lower end of hollow ring seat, three first mounting brackets are respectively fixed in the lower end of three elastic adjusting parts, three roller bodies are respectively rotationally connected on three first mounting brackets;Three elastic adjusting parts are arranged in the lower end of hollow ring seat in annular distribution and the roller body with first avoiding recess.The pre-tightening and reset action of spring, the roller body can be self-adapting close to the outer circumferential surface of round tube shell and end cover, provide circumferential support and coaxial constraint for it.

Description

Technical Field

[0001] This invention relates to the field of welding auxiliary equipment, and more specifically, to an auxiliary welding device for linear motor machining. Background Technology

[0002] A linear motor is an electric drive device that directly converts electrical energy into linear motion mechanical energy. In the manufacturing process of a cylindrical linear motor, its mover is typically tubular (i.e., a cylindrical outer shell). End caps need to be assembled and fixed at both ends of the cylindrical outer shell, and the joint between the two needs to be fixed and sealed by circumferential welding. The auxiliary welding device refers to the process equipment used during the welding process to position, clamp, support, and assist in the assembly of the cylindrical outer shell and end caps.

[0003] In existing technologies, when performing circumferential welding on the cylindrical shell and end cap of a cylindrical linear motor, the bottom of the cylindrical shell is typically clamped on a rotating chuck, the end cap is pressed down from above by a clamping mechanism, and the workpiece is rotated by a drive mechanism to complete the circumferential welding with the welding head. However, since the cylindrical shell usually has a large length-to-diameter ratio, the upper end of the workpiece is prone to radial eccentric wobbling during the rotational welding process. If a roller is set at the upper end of the workpiece for auxiliary support, uneven weld protrusions will gradually form at the joint as the welding process progresses. These protruding welds will frequently press against the auxiliary support roller during rotation, causing sudden changes in the force on the roller, making it impossible to maintain constant pressure against the outer wall of the workpiece, and even hindering the smooth rotation of the workpiece, thus affecting the support stability and welding quality. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide an auxiliary welding device for linear motor processing.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] An auxiliary welding device for linear motor processing includes a base, a chuck rotatably connected to the upper end of the base, and a top pressure assembly fixed to the upper end of the base;

[0007] An auxiliary alignment component is also fixed to the upper end of the base. The auxiliary alignment component includes multiple second frames fixed to the upper end of the base, a hollow ring seat fixed to the upper end of the multiple second frames and located above the chuck, three elastic adjustment parts slidably disposed at the lower end of the hollow ring seat, three first mounting brackets fixed to the lower ends of the three elastic adjustment parts respectively, three rollers rotatably connected to the three first mounting brackets respectively, and a first avoidance groove opened on the outer peripheral surface of the three rollers to avoid the protrusion at the weld. A laser welding part is fixed to the hollow ring seat.

[0008] The top-pressing assembly includes a first frame fixed to the upper end of the base, a first hydraulic rod fixed to the upper end of the first frame, an extension rod fixed to the telescopic end of the first hydraulic rod, and a pressure plate rotatably connected to the lower end of the extension rod.

[0009] Furthermore, the elastic adjustment part includes a first movable groove opened at the lower end of the hollow ring seat and extending radially along the hollow ring seat, a guide rod fixed to the inner wall of the first movable groove, a slide block slidably connected in the first movable groove and movably sleeved outside the guide rod, and a spring sleeved outside the guide rod, wherein the two ends of the spring are respectively connected to the inner wall of the first movable groove and one side of the slide block, and the first mounting bracket is fixed to the lower end of the slide block.

[0010] Furthermore, the hollow ring seat is provided with a dual-point alignment component, which includes a second mounting bracket fixed to the lower end of the hollow ring seat, a second movable groove opened at the upper end of the second mounting bracket, an upper alignment part disposed in the second movable groove, and a lower alignment part disposed at the lower end of the second mounting bracket.

[0011] Furthermore, the upper alignment part includes a rotating seat rotatably connected to the inner wall of the second movable groove, a first pressure roller rotatably connected to one side of the rotating seat, a hinge seat slidably connected to the other side of the rotating seat, and a second hydraulic rod rotatably connected to the second movable groove, wherein the telescopic end of the second hydraulic rod is hinged to the hinge seat, and a chamfered groove is provided on the outer circumferential surface of the first pressure roller.

[0012] Furthermore, the lower alignment part includes a third hydraulic rod fixed to one side of the second mounting frame, a movable seat located on the other side of the second mounting frame, and a second pressure roller rotatably connected in the movable seat, wherein the telescopic end of the third hydraulic rod passes through the second mounting frame and is fixed to the movable seat.

[0013] Furthermore, a convection splash-proof assembly is provided at the lower end of the hollow ring seat. The convection splash-proof assembly includes two third frames symmetrically fixed to the lower end of the hollow ring seat, a cover fixed to one end of the two third frames, a slot opened on the cover for the laser beam to pass through, multiple suction ports opened on the inner wall of the cover, and a suction connector opened at the upper end of the cover and connected to the multiple suction ports. A negative pressure suction part is fixed to the upper end of the hollow ring seat, and the input end of the negative pressure suction part is connected to a suction pipe. The other end of the suction pipe is connected to the suction connector.

[0014] Furthermore, the inner wall of the cover is symmetrically provided with two inclined surfaces, one above the other, and the number of suction ports is three, which are respectively provided on the left and right sides and the upper inclined surface of the inner wall of the cover.

[0015] Furthermore, a scraper is connected to one side of the cover via an elastic component, and one side of the scraper is used to fit against the outer circumferential surface of the round tube shell and the end cap. The scraper and the side of the cover that fits against the round tube shell and the end cap are both provided with a second clearance groove to avoid the protrusion at the weld.

[0016] Furthermore, the first frame is provided with an anti-biased loading component, which includes an upper plate and a lower plate fixedly sleeved outside the extension rod, and multiple guide posts movably inserted inside the first frame. The upper ends of the multiple guide posts are fixedly connected to the lower ends of the upper plate, and the lower ends of the multiple guide posts are fixedly connected to the upper ends of the lower plate.

[0017] Furthermore, the lower plate is located above the pressure plate, and the upper plate is located above the horizontal section of the first frame.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1) The present invention provides three elastic adjustment parts arranged in a ring at the lower end of the hollow ring seat and a roller with a first relief groove. Through the pre-tightening and reset action of the spring, the roller can adaptively fit against the outer circumferential surface of the cylindrical shell and the end cap, providing circumferential support and coaxiality constraint; at the same time, the first relief groove is provided on the circumferential surface of the roller. When the cylindrical shell drives the end cap to rotate and perform circumferential welding, the relief groove can provide a space for the already formed circumferential weld height, avoiding repeated pressure of the weld protrusion on the roller and causing impact or hindering the smooth rotation of the workpiece, thereby maintaining continuous contact between the support roller and the workpiece wall and improving the positioning stability during the welding process.

[0020] (2) This invention, by setting up a double-point alignment assembly including an upper alignment part and a lower alignment part, utilizes a first pressure roller with a chamfered groove to press against the upper chamfered edge of the end cap at an inclined angle, which can simultaneously generate axial pressing and radial positioning components; combined with the pressure of the second pressure roller against the outer wall of the cylindrical shell, it forms a multi-point spatial constraint structure with three circumferentially arranged elastic rollers. This structure can effectively suppress the local swinging and jumping of the cylindrical shell with a large length-to-diameter ratio caused by form and position tolerances or thermal stress during high-speed rotation, which helps to improve the geometric correspondence accuracy of the welding trajectory.

[0021] (3) By setting up a cover, multiple suction ports and a negative pressure suction part, the present invention can use the negative pressure suction flow generated in the molten pool area to timely extract welding fumes, vapors and tiny spatter particles generated during welding, reducing the phenomenon of spatter adhering to the workpiece surface or entering the roller rolling contact area; in conjunction with the scraper set on one side of the cover, the tiny residues carried out with the workpiece rotation can be mechanically scraped off, and the scraper and the cover both have a second avoidance groove to prevent the scraper blade from colliding with the weld reinforcement, thus ensuring the cleanliness of the workpiece surface without damaging the weld quality.

[0022] (4) This invention provides an anti-eccentric loading assembly consisting of an upper plate, a lower plate, and multiple guide posts outside the extension rod. The multiple guide posts are inserted into the first frame to form a guiding constraint, making the extension rod more stable when it moves with the first hydraulic rod. This structure shares the eccentric moment and lateral overturning force that may be generated during the axial loading and transmission of thrust of the extension rod, preventing the extension rod and pressure plate from tilting, ensuring that the pressure plate's end face clamping force on the end cover is evenly distributed, and reducing the risk of angular misalignment between the end cover and the round tube shell due to eccentric clamping. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the top pressure assembly and anti-deviation loading assembly of the present invention;

[0025] Figure 3 This is a schematic diagram of the auxiliary alignment component structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the bottom structure of the hollow ring seat of the present invention;

[0027] Figure 5 This is a schematic diagram of the dual-point alignment component structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the convection splash prevention component structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the scraper and the second clearance groove structure of the present invention.

[0030] Explanation of the labels in the diagram:

[0031] 1. Base; 2. Top pressure assembly; 21. First frame; 22. First hydraulic rod; 23. Extension rod; 24. Pressure plate; 3. Auxiliary alignment assembly; 31. Second frame; 32. Hollow ring seat; 33. First mounting frame; 34. Roller; 35. First clearance groove; 36. First movable groove; 37. Guide rod; 38. Spring; 39. Slide seat; 4. Clamping plate; 5. Laser welding part; 6. Double point alignment assembly; 61. Second mounting frame; 611. Second movable groove; 62. Rotating seat; 63. First pressure roller; 64. Second hydraulic rod; 65. Hinge seat; 66. Third hydraulic rod; 67. Movable seat; 68. Second pressure roller; 69. Chamfered groove; 7. Convection splash guard assembly; 71. Third frame; 72. Cover; 721. Slot; 73. Inclined surface; 74. Suction port; 75. Suction connector; 76. Suction pipe; 77. Negative pressure suction part; 78. Scraper; 79. Second clearance groove; 8. Anti-deviation loading assembly; 81. Upper plate; 82. Guide post; 83. Lower plate. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1 to 7 An auxiliary welding device for linear motor processing includes a base 1, a chuck 4 rotatably connected to the upper end of the base 1, and a top pressing assembly 2 fixed to the upper end of the base 1.

[0034] An auxiliary alignment component 3 is also fixed to the upper end of the base 1. The auxiliary alignment component 3 includes a plurality of second frames 31 fixed to the upper end of the base 1, a hollow ring seat 32 fixed to the upper end of the plurality of second frames 31 and located above the chuck 4, three elastic adjustment parts slidably disposed at the lower end of the hollow ring seat 32, three first mounting brackets 33 respectively fixed to the lower end of the three elastic adjustment parts, three rollers 34 respectively rotatably connected to the three first mounting brackets 33, and a first avoidance groove 35 opened on the outer peripheral surface of the three rollers 34 to avoid the protrusion at the weld. A laser welding part 5 is fixed to the hollow ring seat 32.

[0035] The top pressure assembly 2 includes a first frame 21 fixed to the upper end of the base 1, a first hydraulic rod 22 fixed to the upper end of the first frame 21, an extension rod 23 fixed to the telescopic end of the first hydraulic rod 22, and a pressure plate 24 rotatably connected to the lower end of the extension rod 23.

[0036] The elastic adjustment part includes a first movable groove 36 formed at the lower end of the hollow ring seat 32 and extending radially along the hollow ring seat 32; a guide rod 37 fixed to the inner wall of the first movable groove 36; a slide seat 39 slidably connected in the first movable groove 36 and movably sleeved outside the guide rod 37; and a spring 38 sleeved outside the guide rod 37, with both ends of the spring 38 connected to the inner wall of the first movable groove 36 and one side of the slide seat 39, respectively. The first mounting bracket 33 is fixed to the lower end of the slide seat 39. The initial preload thrust during spring 38 assembly... The radial centrifugal force generated by the circular tube shell at the welding rotation speed is greater than the maximum. This ensures that the roller 34 does not detach from the workpiece; and when the roller 34 is pushed outward to the maximum diameter state, the maximum elastic force of the spring 38 is less than the radial yield limit load of the round tube shell, preventing the workpiece from being deformed by pressure.

[0037] By adopting the above technical solution, the mover of the linear motor (referred to as the cylindrical shell in the following description of this application) passes through the hollow cavity inside the hollow ring seat 32, and the lower end of the mover extends into the inside of the clamping plate 4. The clamping plate 4 clamps the cylindrical shell. The base 1 is equipped with a drive structure for driving the clamping plate 4 to rotate. The clamping plate 4 is driven to rotate through a motor, reducer, and gear transmission, thereby driving the cylindrical shell to rotate. The end cap passes through the hollow cavity inside the hollow ring seat 32 and covers the upper end of the cylindrical shell. The first hydraulic rod 22 is controlled to extend and drive the extension rod 23 to move downward. The downward movement of the extension rod 23 drives the pressure plate 24 to move downward and press against the upper end of the end cap, completing the clamping and positioning of the end cap.

[0038] When the outer shell and end cap of the circular tube pass through the hollow cavity within the hollow ring seat 32, their outer circumferential surfaces come into contact with the outer surface of the roller body 34. As the outer shell and end cap enter the center of the three roller bodies 34, they push the three roller bodies 34 outwards to expand their diameter. This movement of the three roller bodies 34 drives the first mounting frame 33 and the slide block 39, causing the spring 38 to compress and store energy. The force generated by the spring 38 pushes the slide block 39 to move within the first movable groove 36. The movement of the slide block 39 drives the first mounting frame 33 and the roller bodies 34 towards the outer shell of the circular tube, ensuring that the roller bodies 34 remain in contact with the outer circumferential surfaces of the outer shell and end cap, thus achieving coaxial constraint support for the outer shell and end cap. When the drive chuck 4 rotates, it can drive the cylindrical shell and the end cap to rotate synchronously. The pressure plate 24 rotates synchronously with the end cap. At the same time, the roller 34, which is in contact with the outer peripheral surface of the cylindrical shell and the end cap, also rotates. The laser welding part 5 performs welding treatment on the connection between the end cap and the upper end of the cylindrical shell. The first clearance groove 35 can accommodate the uneven weld points formed by welding, and prevent the uneven weld points from contacting the outer peripheral surface of the roller 34, which would prevent the roller 34 from making constant pressure contact with the outer peripheral surface of the end cap and the cylindrical shell.

[0039] like Figure 4 and Figure 5 As shown, a double-point alignment component 6 is provided on the hollow ring seat 32. The double-point alignment component 6 includes a second mounting bracket 61 fixed to the lower end of the hollow ring seat 32, a second movable groove 611 opened on the upper end of the second mounting bracket 61, an upper alignment part provided in the second movable groove 611, and a lower alignment part provided at the lower end of the second mounting bracket 61.

[0040] The upper alignment part includes a rotating seat 62 rotatably connected to the inner wall of the second movable groove 611, a first pressure roller 63 rotatably connected to one side of the rotating seat 62, a hinge seat 65 slidably connected to the other side of the rotating seat 62, and a second hydraulic rod 64 rotatably connected to the second movable groove 611. The telescopic end of the second hydraulic rod 64 is hinged to the hinge seat 65. The outer circumferential surface of the first pressure roller 63 is provided with a chamfered groove 69. To prevent mechanical dead points in the hinge transmission, the angle between the telescopic axis of the second hydraulic rod 64 and the sliding trajectory line of the hinge seat 65 on the rotating seat 62 is limited to between 20° and 160° throughout the entire push-pull swing stroke, thereby ensuring that the second hydraulic rod 64 can stably provide tangential driving force and smoothly drive the rotating seat 62 to swing around the axis.

[0041] The lower alignment part includes a third hydraulic rod 66 fixed to one side of the second mounting frame 61, a movable seat 67 located on the other side of the second mounting frame 61, and a second pressure roller 68 rotatably connected in the movable seat 67. The telescopic end of the third hydraulic rod 66 passes through the second mounting frame 61 and is fixed to the movable seat 67.

[0042] By adopting the above technical solution, when the pressure plate 24 presses against the upper end of the end cap, the second hydraulic rod 64 extends during the operation of the upper alignment part. The telescopic end of the second hydraulic rod 64 pushes the hinge seat 65 to slide upward along one side of the rotating seat 62, causing the rotating seat 62 to swing around its axis. This causes the first pressure roller 63 on one side of the rotating seat 62 to move towards the upper end of the end cap, so that the first pressure roller 63 is pressed against the upper chamfered edge of the end cap at an inclined angle. The geometric fit between the chamfered groove 69 and the chamfer of the end cap can form a two-way constraint force in both the axial and radial directions, suppressing the slight upward jump or tilt of the end cap during high-speed rotation. At the same time, the third hydraulic rod 66 of the lower alignment part drives the movable seat 67 to push the second pressure roller 68 to press smoothly against the outer wall of the cylindrical shell. The upper and lower dual-point local constraint formed by the first pressure roller 63 and the second pressure roller 68, together with the annular three-point adaptive support formed by the three elastic rollers 34, constitutes coaxiality support, improving the relative geometric accuracy of the welding trajectory.

[0043] Furthermore, since the first pressure roller 63 and the second pressure roller 68 are far from the weld seam area, when unevenness occurs around the weld seam on the outer circumference of the round tube shell and the end cap, causing the roller body 34 to be unable to stably constrain it, the first pressure roller 63 and the second pressure roller 68 can also stably constrain the end cap and the round tube shell, thereby improving the stability of the coaxial welding process.

[0044] like Figure 6 and Figure 7As shown, a convection splash-proof component 7 is provided at the lower end of the hollow ring seat 32. The convection splash-proof component 7 includes two third frames 71 symmetrically fixed to the lower end of the hollow ring seat 32, a cover 72 fixed to one end of the two third frames 71, a slot 721 opened on the cover 72 for the laser beam emitted by the laser welding part 5 to pass through and irradiate the weld between the round tube shell and the end cap, multiple suction ports 74 opened on the inner wall of the cover 72, and a suction connector 75 opened at the upper end of the cover 72 and connected to the multiple suction ports 74. A negative pressure suction part 77 is fixed to the upper end of the hollow ring seat 32, and the input end of the negative pressure suction part 77 is connected to a suction pipe 76. The other end of the suction pipe 76 is connected to the suction connector 75.

[0045] The inner wall of the cover 72 is symmetrically provided with two inclined surfaces 73, and the number of suction ports 74 is three. The three suction ports 74 are respectively provided on the left and right sides of the inner wall of the cover 72 and the upper inclined surface 73.

[0046] A scraper 78 is connected to one side of the cover 72 via an elastic component, and one side of the scraper 78 is used to fit against the outer peripheral surface of the round tube shell and the end cap. The scraper 78 and the side of the cover 72 that fits against the outer peripheral surface of the round tube shell and the end cap are both provided with a second avoidance groove 79 to avoid the protrusion at the weld.

[0047] The elastic component includes a guide hole on one side of the cover 72, a guide shaft slidably connected within the guide hole, and a return spring sleeved on the outside of the guide shaft. The scraper 78 is fixed to the outer end of the guide shaft. Under the preload of the return spring, the cutting edge of the scraper 78 can adaptively and elastically conform to the outer circumferential surface of the cylindrical shell and the end cap. When the cylindrical shell experiences radial eccentricity during rotation, the scraper 78 can overcome the spring force of the return spring and radially float back, thereby maintaining a constant micro-gap contact pressure and avoiding rigid interference and hard impact.

[0048] In this application, the first clearance groove 35 is used to avoid the excess height of the circumferential weld. To ensure reliable clearance, the axial groove width of the first clearance groove 35 is... Width greater than the maximum weld width set for the circumferential weld process And the radial groove depth of the first clearance groove 35 Greater than the expected maximum reinforcement height formed by circumferential welding Similarly, the second clearance groove 79 on the cover 72 and the scraper 78 also satisfy the above-mentioned dimensional matching relationship.

[0049] By adopting the above technical solution, the design of the cover 72 can shield the spatter generated during welding, preventing it from falling onto the outer surface of the cylindrical tube shell and the outer circumference of the end cap. The auxiliary protective gas ejected from the laser welding section 5 is guided by the lower inclined surface 73 inside the cover 72, forming a relatively concentrated local gas curtain protection in the molten pool area. When the negative pressure suction section 77 is working, it can generate negative pressure at the suction port 74. The metal vapor, fumes, and tiny spatter particles generated during the welding process, under the combined action of the diffusion kinetic energy of the protective gas and the local suction negative pressure applied by the negative pressure suction section 77 through the three suction ports 74 (left, right, and upper inclined surface 73), form a flow field. Welding fumes and spatter can be sucked into the suction port 74 and then into the negative pressure suction section 77 after passing through the suction pipe 76. This design helps prevent high-temperature spatter from adhering to the surface of the cylindrical tube shell or entering the rolling contact area of ​​the roller 34, reducing the adverse effects on the subsequent rolling accuracy.

[0050] Meanwhile, the scraper 78 is movably mounted on one side of the cover 72 and located on the downstream rotation path of the weld. A return spring is connected between the scraper 78 and the cover 72. Under the preload of the return spring, the blade of the scraper 78 adaptively and elastically fits the outer circumferential surface of the cylindrical shell and the end cap. When the cylindrical shell experiences radial eccentric swaying, the scraper 78 floats radially synchronously with the outer wall of the workpiece, mechanically scraping away the tiny residues carried out with the rotation of the workpiece. The height of the scraper 78 and the second clearance groove 79 on the cover 72 corresponds to the position of the circumferential weld reinforcement after welding, ensuring that the scraper 78 will not impact or damage the formed weld reinforcement while scraping away the spatter on both sides, thus achieving the technical effect of both spatter cleaning and weld protection.

[0051] like Figure 2 As shown, the first frame 21 is equipped with an anti-deviation loading component 8, which includes an upper plate 81 and a lower plate 83 fixedly sleeved outside the extension rod 23, and multiple guide posts 82 movably inserted inside the first frame 21. The upper ends of the multiple guide posts 82 are fixedly connected to the lower ends of the upper plate 81, and the lower ends of the multiple guide posts 82 are fixedly connected to the upper ends of the lower plate 83. The initial vertical distance between the lower end face of the upper plate 81 and the upper end face of the horizontal section of the first frame 21 is greater than the maximum downward stroke when the first hydraulic rod 22 drives the pressure plate 24 to press the end cap downward.

[0052] The lower platen 83 is located above the pressure plate 24, and the upper platen 81 is located above the horizontal section of the first frame 21. The initial vertical distance between the lower end face of the upper platen 81 and the upper end face of the horizontal section of the first frame 21 is... The maximum downward stroke of the first hydraulic rod 22 driving the pressure plate 24 to press the end cover downward is greater than the maximum downward stroke. Furthermore, the initial vertical distance between the upper end face of the lower plate 83 and the lower end face of the horizontal section of the first frame 21; The maximum reverse stroke when the first hydraulic rod 22 retracts upward to return to its original position is greater than the maximum reverse stroke. This is to avoid mechanical hard interference of the extension rod 23 at its extreme working position.

[0053] By adopting the above technical solution, during the process of the extension rod 23 being driven downward or upward by the first hydraulic rod 22, the upper plate 81 and the lower plate 83 move synchronously with the extension rod 23, and the multiple guide posts 82 achieve linear sliding within the corresponding guide holes of the first frame 21. Since the multiple guide posts 82 are distributed around the extension rod 23, they can effectively share the lateral overturning moment that may be generated when the extension rod 23 is subjected to axial force, reducing the probability of the extension rod 23 producing slight deviation or vibration, making the pressing pressure applied by the pressure plate 24 to the end cover more evenly distributed, thereby reducing the risk of eccentric shaking during the assembly or rotation of the end cover and the round tube shell end face due to eccentric pressing.

[0054] Usage: Insert the outer shell of the round tube into the hollow ring seat 32 and clamp it with the clamping plate 4. Place the end cap on the upper end of the round tube shell. The first hydraulic rod 22 drives the extension rod 23 and the pressure plate 24 to press the end cap downward. At the same time, the upper plate 81, lower plate 83 and multiple guide posts 82 of the anti-deviation loading assembly 8 move synchronously with the extension rod 23 to counteract the lateral overturning moment. When the round tube shell and the end cap pass through the hollow ring seat 32, they push the three rollers 34 to expand their diameter outward and compress the spring 38. Under the action of the spring 38, the slide 39 and the first mounting bracket 33 drive the rollers 34 to continuously press against the outer wall of the workpiece with constant pressure. The first clearance groove 35 on the rollers 34 can accommodate the weld seam. The first pressure roller 63 with chamfered groove 69 is pressed against the chamfer on the end cap by the second hydraulic rod 64, which then pushes the rotating seat 62 to make the first pressure roller 63 with chamfered groove 69 press against the chamfer on the end cap. The third hydraulic rod 66 drives the movable seat 67 to make the second pressure roller 68 press against the outer wall of the round tube shell to form a three-dimensional constraint. The drive chuck 4 drives the workpiece to rotate, the laser welding part 5 performs welding, and the negative pressure suction part 77 sucks up welding fumes and spatter through the suction pipe 76, suction connector 75 and suction port 74 on the inner wall of the cover 72. The scraper 78 on one side of the cover 72 is pressed against the outer wall of the workpiece to scrape off the spatter residue. The scraper 78 and the second avoidance groove 79 on the cover 72 avoid the already formed weld seam excess height, ensuring that the circumferential weld process is completed smoothly.

[0055] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. An auxiliary welding device for linear motor machining, comprising a base (1), a chuck (4) rotatably connected to the upper end of the base (1), and a pressing assembly (2) fixed to the upper end of the base (1), characterized in that: The base (1) is also fixed with an auxiliary alignment component (3). The auxiliary alignment component (3) includes a plurality of second frames (31) fixed to the upper end of the base (1), a hollow ring seat (32) fixed to the upper end of the plurality of second frames (31) and located above the chuck (4), three elastic adjustment parts slidably disposed at the lower end of the hollow ring seat (32), three first mounting brackets (33) fixed to the lower end of the three elastic adjustment parts respectively, three rollers (34) rotatably connected to the three first mounting brackets (33) respectively, and a first avoidance groove (35) opened on the outer peripheral surface of the three rollers (34) to avoid the protrusion at the weld. A laser welding part (5) is fixedly connected to the hollow ring seat (32). The top pressure assembly (2) includes a first frame (21) fixed to the upper end of the base (1), a first hydraulic rod (22) fixed to the upper end of the first frame (21), an extension rod (23) fixed to the telescopic end of the first hydraulic rod (22), and a pressure plate (24) rotatably connected to the lower end of the extension rod (23).

2. The auxiliary welding device for linear motor processing according to claim 1, characterized in that: The elastic adjustment part includes a first movable groove (36) opened at the lower end of the hollow ring seat (32) and extending radially along the hollow ring seat (32), a guide rod (37) fixed to the inner wall of the first movable groove (36), a slide (39) slidably connected in the first movable groove (36) and movably sleeved outside the guide rod (37), and a spring (38) sleeved outside the guide rod (37). The two ends of the spring (38) are respectively connected to the inner wall of the first movable groove (36) and one side of the slide (39). The first mounting bracket (33) is fixed to the lower end of the slide (39).

3. The auxiliary welding device for linear motor processing according to claim 1, characterized in that: The hollow ring seat (32) is provided with a double-point alignment component (6), which includes a second mounting bracket (61) fixed to the lower end of the hollow ring seat (32), a second movable groove (611) opened on the upper end of the second mounting bracket (61), an upper alignment part provided in the second movable groove (611), and a lower alignment part provided at the lower end of the second mounting bracket (61).

4. The auxiliary welding device for linear motor processing according to claim 3, characterized in that: The upper alignment part includes a rotating seat (62) rotatably connected to the inner wall of the second movable groove (611), a first pressure roller (63) rotatably connected to one side of the rotating seat (62), a hinge seat (65) slidably connected to the other side of the rotating seat (62), and a second hydraulic rod (64) rotatably connected to the second movable groove (611). The telescopic end of the second hydraulic rod (64) is hinged to the hinge seat (65), and a chamfered groove (69) is provided on the outer circumferential surface of the first pressure roller (63).

5. The auxiliary welding device for linear motor processing according to claim 4, characterized in that: The lower alignment part includes a third hydraulic rod (66) fixed to one side of the second mounting frame (61), a movable seat (67) located on the other side of the second mounting frame (61), and a second pressure roller (68) rotatably connected in the movable seat (67). The telescopic end of the third hydraulic rod (66) passes through the second mounting frame (61) and is fixed to the movable seat (67).

6. The auxiliary welding device for linear motor processing according to claim 1, characterized in that: The lower end of the hollow ring seat (32) is provided with a convection anti-splash assembly (7). The convection anti-splash assembly (7) includes two third frames (71) symmetrically fixed to the lower end of the hollow ring seat (32), a cover (72) fixed to one end of the two third frames (71), a slot (721) opened on the cover (72) for the laser beam to pass through, multiple suction ports (74) opened on the inner wall of the cover (72), and a suction connector (75) opened on the upper end of the cover (72) and connected to the multiple suction ports (74). The upper end of the hollow ring seat (32) is fixed with a negative pressure suction part (77), and the input end of the negative pressure suction part (77) is connected to a suction pipe (76). The other end of the suction pipe (76) is connected to the suction connector (75).

7. An auxiliary welding device for linear motor processing according to claim 6, characterized in that: The inner wall of the cover (72) is symmetrically provided with two inclined surfaces (73) at the top and bottom. There are three suction ports (74), which are respectively located on the left and right sides of the inner wall of the cover (72) and the upper inclined surface (73).

8. An auxiliary welding device for linear motor processing according to claim 6 or 7, characterized in that: The cover (72) is connected to a scraper (78) on one side by an elastic component, and the scraper (78) is used to fit against the outer circumferential surface of the round tube shell and the end cap. The scraper (78) and the side of the cover (72) that fits against the round tube shell and the end cap are both provided with a second avoidance groove (79) to avoid the protrusion at the weld.

9. An auxiliary welding device for linear motor machining according to claim 1, characterized in that: The first frame (21) is provided with an anti-bias loading component (8), and the anti-bias loading component (8) includes an upper plate (81) and a lower plate (83) fixedly sleeved outside the extension rod (23), and multiple guide posts (82) movably inserted inside the first frame (21). The upper ends of the multiple guide posts (82) are fixedly connected to the lower ends of the upper plate (81), and the lower ends of the multiple guide posts (82) are fixedly connected to the upper ends of the lower plate (83).

10. An auxiliary welding device for linear motor machining according to claim 9, characterized in that: The lower plate (83) is located above the pressure plate (24), and the upper plate (81) is located above the horizontal section of the first frame (21).

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