Four-axis laser welding platform for round welding of square tube

Abstract

The utility model discloses a square tube circle welding four-axis laser welding platform which comprises a welding machine base, a welding machine platform, a four-axis welding device, a laser welding gun and a square tube circle welding clamp, and the four-axis welding device comprises an X-axis mechanical arm, a Z-axis mechanical arm, a Y-axis mechanical arm and a hollow rotating shaft which are sequentially connected. The laser welding gun is arranged on the hollow rotating shaft and rotates along with the hollow rotating shaft; the square tube circle welding clamp comprises an X-axis check block, a Y-axis check block, a clamping plate, a telescopic fixing device and a baffle device. The hollow rotating shaft is perpendicular to the upper portion of the square tube circle welding clamp, a conical fixing head is arranged below the rotating center of the hollow rotating shaft, and the conical fixing head is rotationally connected with the hollow rotating shaft. According to the utility model, the hollow rotating shaft is arranged for rotary welding, and the square tube and the round tube are fixed and positioned, so that the number, quality and efficiency of welding circles of the square tube can be improved; the four-axis welding device has good flexibility, can adapt to different welding environments and requirements, and is adjusted according to requirements, so that the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding fixtures, in particular to a square tube welding circle four-axis laser welding platform. Background Art

[0002] In recent years, with the rapid development of laser welding technology, domestic research on laser welding fixtures has continued to deepen. Researchers are committed to improving the accuracy, stability and automation of fixtures to meet the high requirements of laser welding quality in different industries. Combined with the rapid development of artificial intelligence robots and automation technology, laser welding fixtures will be more intelligent. By introducing advanced sensors and data analysis algorithms, fixtures can realize automatic welding of part shapes, adjust welding parameters, and automatically correct weld deviations, thereby improving laser welding efficiency and quality.

[0003] Ordinary laser welding platforms do not have clamps when welding square tubes into round ones. The square tube needs to be fixed, and then the round tube is placed on it. The staff welds four points to fix it, and then adjusts the program to weld. This is very time-consuming and the quality is poor.

[0004] The primary task of the square tube welding round fixture is to ensure that the square tube can maintain a precise position and a stable support state during the laser welding process, which helps to avoid possible displacement during the welding process, thereby ensuring the accuracy and quality of the welding. By using a special fixture, precise control of the welding process can be achieved. The use of fixtures can reduce the chance of reprocessing and improve production efficiency. The design of the fixture also needs to take into account the safety of the operator. By providing stability, reliability and fixation, the risk of the operator in the automatic welding process can be reduced. At the same time, the convenience of the fixture can also improve the efficiency of the operator. Summary of the invention

[0005] In view of this, the purpose of the utility model is to solve the technical problems in the prior art that the laser welding machine for square tube welding round fixture has few applicable sizes, slow welding, small welding, and no hollow shaft rotation welding, and to provide a square tube welding round four-axis laser welding platform.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a square tube welding round four-axis laser welding platform, including a welding machine base, a welding machine platform arranged on the upper surface of the welding machine base, a four-axis welding device arranged on the welding machine platform, a laser welding gun arranged on the four-axis welding device and a square tube welding round fixture arranged on the welding machine platform, the four-axis welding device includes an X-axis mechanical arm for lateral translation, a Z-axis mechanical arm for vertical lifting, a Y-axis mechanical arm for front and rear translation and a hollow rotating shaft parallel to the Z-axis and rotatable, the laser welding gun is arranged on the hollow rotating shaft and rotates with it;

[0007] The square tube welding round fixture comprises an X-axis stopper and a Y-axis stopper for positioning the square tube on a plane, a clamp for fixing the square tube, a telescopic fixing device connected to the clamp, and a baffle device for arranging and positioning the round tubes on the square tube in an orderly manner, the clamp is parallel to the X-axis stopper, and the movement direction of the telescopic fixing device is parallel to the Y-axis stopper;

[0008] The hollow rotating shaft is perpendicular to the top of the square tube welding round fixture, and a conical fixing head for pressing and fixing the round tube is arranged below the rotation center of the hollow rotating shaft, and the conical fixing head is rotatably connected to the hollow rotating shaft.

[0009] Preferably, a pressing platform extending outward is provided on the upper portion of the conical fixing head, and the diameter of the pressing platform is larger than the diameter of the conical fixing head.

[0010] Preferably, a rotating shaft seat which rotates synchronously with the hollow rotating shaft and a rotating shaft core which rotates relative to the rotating shaft seat are provided at the end of the hollow rotating shaft, and the conical fixing head is connected to the rotating shaft core.

[0011] Furthermore, a telescopic shaft device is provided between the rotating shaft core and the rotating shaft seat, so that the rotating shaft core and the rotating shaft seat generate axial movement.

[0012] Preferably, the baffle device includes a strip baffle parallel to the X-axis stopper, a telescopic positioning device for allowing the strip baffle to translate forward and backward, a slide rail consistent with the translation direction of the strip baffle, and a slider connected to the strip baffle and translates along the slide rail.

[0013] Furthermore, a plurality of clamping claws arranged in a straight line are arranged at the front of the baffle device, and the openings of the clamping claws are formed into V-shaped positioning portions opening outward.

[0014] Furthermore, a protrusion for connecting with the telescopic positioning device is formed on the lower part of the strip-shaped baffle.

[0015] Preferably, two or more pairs of the clamping plates and telescopic fixing devices are provided, and at least one pair of the clamping plates and telescopic fixing devices is provided at the front and rear ends of the square tube.

[0016] Preferably, the square tube welding round fixture further comprises a fixture bottom plate, on which a plurality of mounting holes for arranging the X-axis stopper, the Y-axis stopper, the telescopic fixing device and the baffle device are formed.

[0017] Preferably, a four-axis fixing structure is provided between the laser welding gun and the hollow rotating shaft, the four-axis fixing structure is vertically connected in sequence by four connecting pipes, and the laser welding gun is arranged at the end of the four-axis fixing structure.

[0018] Furthermore, a coupling is provided between adjacent connecting pipes in the four-axis fixing structure, the coupling is formed with through holes which are perpendicular to each other and staggered up and down, the through holes are formed with elastic openings, and the connecting pipes are fixed by bolts through the elastic openings.

[0019] The technical effects of the utility model are mainly reflected in the following aspects: by setting a hollow rotating axis for rotary welding, and by fixing and positioning the square tube and the round tube, the quantity, quality and efficiency of the square tube welding circle can be improved; the four-axis welding device has good flexibility, can adapt to different welding environments and requirements, can be adjusted according to actual needs, and helps to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of the fixture of the utility model Figure 2 ;

[0022] Figure 3 For this utility model Figure 2 A magnified schematic diagram of part A;

[0023] Figure 4 The structure of the fixture is shown in FIG. Figure 3 ;

[0024] Figure 5 For this utility model Figure 4 An enlarged schematic diagram of part B. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp. Example

[0026] according to Figure 1-5 As shown, a four-axis laser welding platform for square tube welding is provided, comprising a welding machine base 1, a welding machine platform 2 arranged on the upper surface of the welding machine base 1, a four-axis welding device 3 arranged on the welding machine platform 2, a laser welding gun 4 arranged on the four-axis welding device 3 and a square tube welding fixture 5 arranged on the welding machine platform 2, the four-axis welding device 3 comprises an X-axis mechanical arm 31 for lateral translation, a Z-axis mechanical arm 32 for vertical lifting, a Y-axis mechanical arm 33 for front and rear translation and a hollow rotating shaft 34 parallel to the Z-axis and rotatable, which are connected in sequence, the laser welding gun 4 is arranged on the hollow rotating shaft 34 and rotates therewith, and the X-axis mechanical arm 31, the Z-axis mechanical arm 32, the Y-axis mechanical arm 33 and the hollow rotating shaft 34 are all separately provided with motors connected.

[0027] The square tube welding round fixture 5 includes an X-axis stopper 51 and a Y-axis stopper 52 for positioning the square tube on a plane, a clamp 53 for fixing the square tube 7, a telescopic fixing device 54 connected to the clamp 53, and a baffle device 55 for arranging and positioning the round tubes 8 on the square tube 7 in an orderly manner. The X-axis stopper 51 can be composed of one or more combinations. The X-axis stopper 51 positions the length direction of the square tube 7, and the Y-axis stopper 52 positions the width direction of the square tube 7; the clamp 53 is parallel to the X-axis stopper 51, and the movement direction of the telescopic fixing device 54 is parallel to the Y-axis stopper The block 52 is parallel, and the telescopic fixing device 54 can generally adopt a pneumatic cylinder device, such as an NT20 cylinder, to push the clamp 53 toward the square tube 7, so that the square tube 7 is clamped and fixed between the X-axis stop block 51 and the clamp 53; in order to better fix the square tube 7 in the length direction, the clamp 53 and the telescopic fixing device 54 are provided with two or more pairs, and at least one pair of the clamp 53 and the telescopic fixing device 54 is arranged at the front and rear ends of the square tube 7; the baffle device 55 arranges the round tubes 8 in an orderly manner and positions them above the fixed square tube 7.

[0028] The hollow rotating shaft 34 is perpendicular to the top of the square tube welding round fixture 5, and a conical fixing head 341 for pressing and fixing the round tube 8 is arranged below the rotation center of the hollow rotating shaft 34. The conical fixing head 341 is rotatably connected to the hollow rotating shaft 34. The conical fixing head 341 is pressed on the end of the round tube 8 from top to bottom, and its conical surface can partially extend into the end of the round tube 8. The conical surface and the port of the round tube 8 generate vertical pressure and horizontal thrust, so that the round tube 8 is stably fixed on the upper surface of the square tube 7 from top to bottom.

[0029] When the diameter of the circular tube 8 is larger than the diameter of the conical fixing head 341, a pressing platform extending outward may be provided on the upper part of the conical fixing head 341. The diameter of the pressing platform is larger than the diameter of the conical fixing head 341. The pressing platform resists fixation at the end of the circular tube 8. At this time, the conical fixing head 341 as a whole may penetrate into the circular tube 8 to play a positioning role.

[0030] Specifically, a rotating shaft seat that rotates synchronously with the hollow rotating shaft 34 and a rotating shaft core that rotates relative to the rotating shaft seat are provided at the end of the hollow rotating shaft 34, and the conical fixing head 341 is connected to the rotating shaft core. The rotating shaft core is unpoweredly connected. When the rotating shaft seat rotates with the hollow rotating shaft 34, it will remain different due to inertia or friction with the circular tube 8, even if the rotating shaft core rotates relative to the rotating shaft seat; when the pressing platform is provided, the pressing platform rotates with the conical fixing head 341 and the rotating shaft seat.

[0031] In order to adapt to the shaft core and the shaft seat, a telescopic shaft device is provided between the shaft core and the shaft seat to enable the shaft core and the shaft seat to produce axial movement. The telescopic shaft device generally adopts a pneumatic cylinder device, which helps the conical fixing head 341 and the pressing platform to press and fix the round tube 8.

[0032] The baffle device 55 includes a strip baffle 551 parallel to the X-axis stopper 51, a telescopic positioning device 552 for making the strip baffle 551 translate forward and backward, a slide rail 553 consistent with the translation direction of the strip baffle 551, and a slider 554 connected to the strip baffle 551 and translates along the slide rail 553. The telescopic positioning device 552 generally adopts a pneumatic cylinder device, through which the strip baffle 551 is pushed to translate on the slide rail 553, and the strip baffle 551 can translate to the top of the square tube 7 to arrange the round tube 8 in order along the strip baffle 551; generally, the installation position of the telescopic positioning device 552 is close to the welding machine platform 2, and the translation plane of the strip baffle 551 needs to be higher than the square tube 7, so the lower part of the strip baffle 551 is formed with a protrusion for connecting with the telescopic positioning device 552, which is used to raise the height of the strip baffle 551.

[0033] A plurality of claws 555 arranged in a straight line are provided at the front of the baffle device 55. Specifically, a claw 555 can be provided at the front of the strip baffle 551. The opening of the claw 555 is formed as a V-shaped positioning portion 556 that opens outward. The V-shaped positioning portion 556 can match the outer circumference of the circular tube 8, so that the outer circumference of the circular tube 8 can resist the positioning of the circular tube 8 in the V-shaped positioning portion 556. When a plurality of circular tubes 8 are resisted in the orderly arranged claws 555, the plurality of circular tubes 8 are also orderly arranged on the square tube 7.

[0034] In order to facilitate the installation of the square tube welding round fixture 5 on the welding machine platform 2, the square tube welding round fixture 5 also includes a fixture base plate 56, and a plurality of mounting holes for arranging the X-axis block 51, the Y-axis block 52, the telescopic fixing device 54 and the baffle device 55 are formed on the fixture base plate 56. It is only necessary to replace the fixture base plate 56 or form mounting holes in different positions thereon, and different accessories can be installed on it immediately to adapt to the requirements of fixtures of different sizes and types.

[0035] The laser welding gun 4 is connected to the hollow rotating shaft 34, and rotates and welds with the rotation of the hollow rotating shaft 34. However, since the welding position and focal length of the laser welding gun 4 will be adjusted according to the welding objects of different sizes and types, a four-axis fixed structure 6 is arranged between the laser welding gun 4 and the hollow rotating shaft 34. The four-axis fixed structure 6 is vertically connected by four connecting pipes 61 in sequence, and the laser welding gun 4 is arranged at the end of the four-axis fixed structure 6; a coupling 62 is arranged between adjacent connecting pipes 61 in the four-axis fixed structure 6, and the coupling 62 is formed with through holes 621 that are perpendicular to each other and staggered up and down, and an elastic opening 622 is formed on the through hole 621. The elastic opening 622 is fixed to the connecting pipe 61 by bolts. When the elastic opening 622 is loosened, the connecting pipe 61 can be rotated to adjust the different angles and directions of the laser welding gun 4 to achieve the purpose of focusing on the welding position.

[0036] Working principle;

[0037] Place the square tube 7 on the square tube welding fixture 5, use the X-axis stopper 51 and the Y-axis stopper 52 to respectively locate the long axis and the wide axis of the square tube 7, start the telescopic fixing device 54, and clamp the square tube 7;

[0038] Start the telescopic positioning device 552, move the strip baffle 551 horizontally to the top of the square tube 7, and put the round tubes 8 on the V-shaped positioning part 556 of the claw in an orderly manner, so that the round tubes 8 are also arranged in an orderly manner;

[0039] The four-axis welding device 3 is started, and the hollow rotating shaft 34 is brought to the top of the round tube 8 to be processed under the linkage of the X-axis mechanical arm 31, the Z-axis mechanical arm 32 and the Y-axis mechanical arm 33, and the conical fixing head 341 under the hollow rotating shaft 34 and the pressing table are pressed toward the end of the round tube 8, so that the round tube 8 is fixed from top to bottom;

[0040] The hollow rotating shaft 34 is started to rotate around the round tube 8 to be processed, and the laser welding gun 4 welds the round tube 8 and the square tube 7 together as the hollow rotating shaft 34 rotates;

[0041] Then the hollow rotating shaft 34 is lifted up again, and other round tubes 8 are welded in the same manner.

Claims

1. A square tube welding four-axis laser welding platform, characterized by: It includes a welding machine base, a welding machine platform arranged on the upper surface of the welding machine base, a four-axis welding device arranged on the welding machine platform, a laser welding gun arranged on the four-axis welding device and a square tube welding circle fixture arranged on the welding machine platform, the four-axis welding device includes an X-axis mechanical arm for lateral translation, a Z-axis mechanical arm for vertical lifting, a Y-axis mechanical arm for front and rear translation and a hollow rotating shaft parallel to the Z-axis and rotatable, which are connected in sequence, and the laser welding gun is arranged on the hollow rotating shaft and rotates therewith; The square tube welding round fixture comprises an X-axis stopper and a Y-axis stopper for positioning the square tube on a plane, a clamp for fixing the square tube, a telescopic fixing device connected to the clamp, and a baffle device for arranging and positioning the round tubes on the square tube in an orderly manner, the clamp is parallel to the X-axis stopper, and the movement direction of the telescopic fixing device is parallel to the Y-axis stopper; The hollow rotating shaft is perpendicular to the top of the square tube welding round fixture, and a conical fixing head for pressing and fixing the round tube is arranged below the rotation center of the hollow rotating shaft, and the conical fixing head is rotatably connected to the hollow rotating shaft.

2. The four-axis laser welding platform for pipe welding according to claim 1 is characterized by: A pressing platform extending outward is arranged on the upper part of the conical fixing head, and the diameter of the pressing platform is larger than the diameter of the conical fixing head.

3. A square tube welding round four-axis laser welding platform according to claim 1 or 2, characterized in that: A rotating shaft seat which rotates synchronously with the hollow rotating shaft and a rotating shaft core which rotates relative to the rotating shaft seat are arranged at the end of the hollow rotating shaft, and the conical fixing head is connected to the rotating shaft core.

4. The four-axis laser welding platform for pipe welding according to claim 3 is characterized by: A telescopic shaft device is arranged between the rotating shaft core and the rotating shaft seat, so that the rotating shaft core and the rotating shaft seat generate axial movement.

5. The square tube welding round four-axis laser welding platform according to claim 1 is characterized by: The baffle device includes a strip baffle parallel to the X-axis block, a telescopic positioning device for moving the strip baffle forward and backward, a slide rail in the same translation direction as the strip baffle, and a slider connected to the strip baffle and moving along the slide rail.

6. The square tube welding round four-axis laser welding platform according to claim 5 is characterized by: A plurality of clamping claws arranged in a straight line are arranged at the front of the baffle device, and the openings of the clamping claws are formed into V-shaped positioning parts opening outward.

7. The square tube welding round four-axis laser welding platform according to claim 5 is characterized by: A convex block for connecting with the telescopic positioning device is formed at the lower part of the strip-shaped baffle.

8. The square tube welding round four-axis laser welding platform according to claim 1 is characterized by: The square tube welding round fixture also includes a fixture bottom plate, on which a plurality of mounting holes for arranging the X-axis stopper, the Y-axis stopper, the telescopic fixing device and the baffle device are formed.

9. The square tube welding round four-axis laser welding platform according to claim 1, characterized in that: A four-axis fixing structure is arranged between the laser welding gun and the hollow rotating shaft. The four-axis fixing structure is vertically connected in sequence by four connecting pipes. The laser welding gun is arranged at the end of the four-axis fixing structure.

10. The square tube welding round four-axis laser welding platform according to claim 9, characterized in that: A coupling is arranged between adjacent connecting pipes in the four-axis fixing structure. The coupling is formed with through holes which are perpendicular to each other and staggered up and down. The through holes are formed with elastic openings, and the connecting pipes are fixed by bolts through the elastic openings.

Images