Laser welding device for annular welding

Abstract

The invention relates to the technical field of laser welding, and discloses a laser welding device for annular welding, which comprises a welding machine capable of welding a circular part, a gravity placement type driving mechanism and a hydraulic fixing mechanism, the interior of the hollow hydraulic rod is of a hollow structure, the arc-shaped abutting plate is installed on the periphery of the hollow hydraulic rod and can abut against the circumferential inner wall of the circular part, and the piston plate is placed in the hollow hydraulic rod and can move outwards relative to the arc-shaped abutting plate. According to the laser welding device for annular welding, two round pieces needing to be welded can be placed on the surface of the rotating roller at a fixed interval, so that the welded round pieces can rotate, it is guaranteed that the round pieces are welded on the basis that a welding head is in the fixed direction, and in addition, the welding efficiency is improved. The device can be used for welding and processing circular pieces with different sizes, so that the welding range of equipment is expanded.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, specifically to a laser welding apparatus for ring welding. Background Technology

[0002] Currently, laser welding equipment used for ring welding is a laser device specifically designed to perform ring or circumferential welding tasks.

[0003] For example, Chinese patent publication number "CN223544345U" discloses "A laser welding device for ring welding," whose main structure includes a base, a control cabinet mounted on the top of the base, a welding frame fixedly connected to the top of the base by screws, a rotation limit block slidably mounted inside the welding frame, a cable fixing block fixedly connected to one side of the rotation limit block, a circular rack slidably fixedly connected inside the welding frame, a sliding frame slidably mounted inside the welding frame, and a servo motor mounted on one side of the sliding frame. Through the arrangement of the servo motor, electric cylinder, and other structures, after the circular part is fixed, the electric cylinder is activated to adjust the position of the welding head, and then the servo motor is activated to rotate the angle of the welding head, so that the welding head can directly and uniformly weld the outer circumference of the circular part, improving the welding effect.

[0004] It is obvious that the laser welding device for ring welding mentioned above requires the circular part to be installed inside the clamping frame. Since the inner diameter of the clamping frame is a fixed value, the device can only perform welding work on circular parts with a single radius, resulting in its processing size being too limited. In addition, the welding frame with the welding head needs to rotate, and the rotating welding frame needs to drive the welding head to rotate. The welding head is connected to the power supply through a wire. The rotating welding head is prone to causing the connecting wire to become tangled or even twisted, resulting in poor processing stability. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a laser welding device for ring welding. This device places two circular parts to be welded at a fixed distance on the surface of a rotating roller, allowing the circular parts to rotate. This ensures that the welding head welds the circular parts from a fixed position. Furthermore, the device can weld circular parts of different sizes, expanding the welding range of the equipment and solving the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a laser welding device for ring welding, comprising a welding machine capable of welding circular parts, and a gravity-placed drive mechanism, the structure of which includes two symmetrically arranged primary mounting bases, a primary rotating shaft rotatably mounted between the two primary mounting bases, a rotating roller mounted on the shaft of the primary rotating shaft and capable of driving the circular parts to rotate, and a drive motor capable of driving the two primary rotating shafts to rotate; and a hydraulic fixing mechanism, the structure of which includes a hollow hydraulic rod with a hollow internal structure, an arc-shaped contact plate mounted on the periphery of the hollow hydraulic rod and capable of abutting against the inner circumference of the circular parts, and a piston plate placed inside the hollow hydraulic rod and capable of generating outward movement of the arc-shaped contact plate.

[0007] Preferably, the gravity-placed drive mechanism further includes a motor mounting housing installed at one end of one of the mounting bases. A horizontally positioned drive motor is fixedly installed inside the motor mounting housing. A double-groove pulley is fixedly fitted onto the rotor end of the drive motor. Each mounting base has two V-shaped connecting ears integrated with it. A rotating shaft is mounted between the two corresponding V-shaped connecting ears via a bearing. Multiple rotating rollers are fixedly installed on the shaft of each rotating shaft. A single-groove pulley is fixedly fitted onto the ends of the two rotating shafts. The single-groove pulley and the double-groove pulley are linked by a synchronous belt.

[0008] Preferably, the outer circumferential surface of the rotating roller is provided with a layer of rubber material that can increase the friction between it and the outer circumferential surface of the circular part.

[0009] Preferably, the structural diameter of the outer circumference of the circular part being processed is larger than the distance between the two rotating rollers.

[0010] Preferably, the hydraulic fixing mechanism further includes a first liquid flow hole disposed inside the hollow hydraulic rod and equipped with a valve at one end. The hollow hydraulic rod has multiple cylindrical protrusions arranged in a ring array near its two ends. Each cylindrical protrusion has a component movable cavity inside. One end of the component movable cavity is provided with a second liquid flow hole communicating with the first liquid flow hole. The other end of the component movable cavity is provided with a rod through hole communicating with the outside space. A piston plate capable of moving axially along the component movable cavity is placed inside the cylindrical protrusion. A telescopic rod passing through the rod through hole is fixedly installed on the end face of the piston plate facing the rod through hole. A compressed helical spring is sleeved around the rod body located inside the component movable cavity. An arc-shaped abutment plate is fixedly installed at one end of the telescopic rod. A buffer pad is fixedly installed on the outer convex surface of the arc-shaped abutment plate.

[0011] Preferably, the structural shape of the perforated cross section of the rod is consistent with the structural shape of the cross section of the telescopic rod, both being polygonal structures, and the structural dimensions of the perforated cross section of the rod are adapted to the structural dimensions of the cross section of the telescopic rod.

[0012] Preferably, it also includes a threaded moving mechanism, the structure of which includes a moving block that can drive the welding machine to move horizontally, an external threaded rod installed at the center of the moving block and capable of moving the moving block when rotating, a horizontal limit rod that can prevent the moving block from rotating, and a knob cap that can drive the external threaded rod to rotate.

[0013] Preferably, the threaded moving mechanism further includes two symmetrically arranged second mounting bases. A rotatable second rotating shaft is mounted at the center of each second mounting base via a bearing. One end of one of the second rotating shafts is fitted with a knob cap. A horizontal limiting rod is fixedly installed between the two second mounting bases. An external threaded rod is fixedly installed at the opposite ends of the two second rotating shafts via a coupling. The moving block has an internal threaded hole installed at the body of the external threaded rod via a threaded structure. The moving block has a limiting sliding hole that can slide along the axial direction of the horizontal limiting rod. The top of the moving block has a fixed base plate integrally formed with it and fixedly connected to the welding machine.

[0014] Preferably, the thread structure includes an internal thread structure disposed on the inner wall of the internal thread hole and an external thread structure disposed on the external thread rod body, and the internal thread structure and the external thread structure are adapted to each other.

[0015] Preferably, the cross-sectional shape of the limiting sliding hole is consistent with the cross-sectional shape of the horizontal limiting rod, both being polygonal structures, and the structural dimensions of the cross-sectional shape of the limiting sliding hole are adapted to the structural dimensions of the cross-sectional shape of the horizontal limiting rod.

[0016] Compared with the prior art, the present invention provides a laser welding apparatus for ring welding, which has the following beneficial effects: This device can place two circular parts to be welded at a fixed distance on the surface of a rotating roller, allowing the circular parts to rotate. This ensures that the welding head welds the circular parts in a fixed position. In addition, the device can weld circular parts of different sizes, thereby expanding the welding range of the equipment. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the present invention; Figure 3 This is a perspective view of the gravity-placed drive mechanism in this invention; Figure 4This is a three-dimensional cross-sectional view of the gravity-placed drive mechanism in this invention; Figure 5 This is a perspective view of the hydraulic fixing mechanism in this invention; Figure 6 This is a three-dimensional cross-sectional view of the hydraulic fixing mechanism in this invention; Figure 7 This is a perspective view of the threaded moving mechanism in this invention; Figure 8 This is a three-dimensional cross-sectional view of the threaded moving mechanism in this invention.

[0018] The components include: 1. Welding machine; 2. Circular parts; 3. Gravity-placed drive mechanism; 31. Mounting base No. 1; 32. V-shaped connecting ear; 33. Rotating shaft No. 1; 34. Rotating roller; 35. Single-groove pulley; 36. Synchronous belt; 37. Motor mounting housing; 38. Drive motor; 39. Double-groove pulley; 4. Hydraulic fixing mechanism; 41. Hollow hydraulic rod; 42. Liquid flow hole No. 1; 43. Columnar protrusion structure; 44. Component movable parts. 45. Moving cavity; 46. Liquid flow hole No. 2; 47. Rod body through hole; 48. Piston plate; 49. Telescopic rod; 40. Arc-shaped contact plate; 410. Buffer pad; 411. Helical spring; 5. Threaded moving mechanism; 51. Mounting base No. 2; 52. Rotating shaft No. 2; 53. Knob cap; 54. Coupling; 55. External threaded rod; 56. Horizontal limit rod; 57. Moving block; 58. Internal threaded hole; 59. Limiting sliding hole; 510. Fixed base plate. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1 and Figure 2 A laser welding apparatus for ring welding includes a welding machine 1 capable of welding circular parts 2. By starting the welding machine 1, the weld seam of two circular parts 2 can be welded.

[0021] To implement the driving function for ring 2, please refer to... Figure 1 , Figure 2 , Figure 3 and Figure 4A gravity-placed drive mechanism 3 needs to be set up. Its structure includes two symmetrically arranged mounting bases 31, a rotating shaft 33 rotatably mounted between the two mounting bases 31, a rotating roller 34 mounted on the shaft of the rotating shaft 33 and capable of driving the circular part 2 to rotate, and a drive motor 38 capable of driving the two rotating shafts 33 to rotate. The outer circumference of the two positioned circular parts 2 is placed on the top circumference of the rotating roller 34. Then, the drive motor 38 is started, and its rotor drives the double-groove pulley 39 to rotate. Under the linkage of the synchronous belt 36, the two single-groove pulleys 35 drive the two rotating shafts 33 to rotate synchronously. Under the action of friction, the rotating roller 34 drives the circular part 2 to rotate. By controlling the speed of the drive motor 38, the welding speed can be controlled, thereby realizing the driving function of the circular part 2.

[0022] For the specific structure of the gravity-placed drive mechanism 3, please refer to [link / reference]. Figure 3 and Figure 4 It also includes a motor mounting housing 37 installed at one end of one of the mounting bases 31. A horizontally mounted drive motor 38 is fixedly installed inside the motor mounting housing 37. A double-groove pulley 39 is fixedly fitted at the rotor end of the drive motor 38. Two V-shaped connecting ears 32 with an integral structure are provided above each mounting base 31. A rotating shaft 33 is mounted between the two corresponding V-shaped connecting ears 32 through a bearing. Multiple rotating rollers 34 that rotate with the shaft are fixedly installed on the shaft of each rotating shaft 33. A single-groove pulley 35 is fixedly fitted at the end of each of the two rotating shafts 33. The single-groove pulley 35 and the double-groove pulley 39 are linked by a synchronous belt 36. A layer of rubber material is provided on the outer circumference of the rotating roller 34 to increase the friction between it and the outer circumference of the circular part 2. The structural diameter of the outer circumference of the circular part 2 being processed is larger than the distance between the two rotating rollers 34.

[0023] To achieve synchronous positioning of the two circular rings 2, please refer to... Figure 2 , Figure 5 and Figure 6A hydraulic fixing mechanism 4 needs to be installed. Its structure includes a hollow hydraulic rod 41 with a hollow interior, an arc-shaped contact plate 49 installed around the hollow hydraulic rod 41 and capable of contacting the inner circumference of the circular component 2, and a piston plate 47 placed inside the hollow hydraulic rod 41 and capable of causing outward movement of the arc-shaped contact plate 49. First, a hydraulic device is used. The hollow hydraulic rod 41 is inserted into the center of the two circular components 2. Then, the hydraulic device is connected to the inlet port of the hollow hydraulic rod 41 through a pipe, and the hydraulic system is started. In this device, liquid enters the first liquid flow hole 42 and eventually flows into the interior of each component's movable cavity 44. Under liquid pressure, each arc-shaped contact plate 49 moves outward until each buffer pad 410 abuts against the inner circumference of the ring 2. Since multiple arc-shaped contact plates 49 move outward under the same pressure, the buffer pad 410 can position the ring 2 with a certain pressure. During the positioning of the ring 2, the welding gap between the two rings 2 is controlled so that the gap is in the appropriate position.

[0024] For details regarding the specific structure of the hydraulic fixing mechanism 4, please refer to [link / reference]. Figure 5 and Figure 6 It also includes a first liquid flow hole 42 disposed inside the hollow hydraulic rod 41 and equipped with a valve at one end. The hollow hydraulic rod 41 has multiple cylindrical protrusions 43 arranged in a ring array near its two ends. Each cylindrical protrusion 43 has a component movable cavity 44 inside. One end of the component movable cavity 44 is provided with a second liquid flow hole 45 that connects to the first liquid flow hole 42. The other end of the component movable cavity 44 is provided with a rod through hole 46 that connects to the outside space. A piston capable of moving axially along the component movable cavity 44 is placed inside the cylindrical protrusion 43 and the component movable cavity 44. The piston plate 47 has a telescopic rod 48 that passes through the rod ...

[0025] To enable the horizontal movement of welding machine 1, please refer to... Figure 1 , Figure 7 and Figure 8A threaded moving mechanism 5 needs to be set up. Its structure includes a moving block 57 that can drive the welding machine 1 to move horizontally, an external threaded rod 55 installed at the center of the moving block 57 and capable of moving the moving block 57 when rotating, a horizontal limit rod 56 that can prevent the moving block 57 from rotating, and a knob cap 53 that can drive the external threaded rod 55 to rotate. By rotating the knob cap 53 in a directional manner, due to the threaded connection, the rotation of the external threaded rod 55 will cause the moving block 57 to move horizontally until the welding head of the welding machine 1 is at the welding gap, thereby realizing the horizontal movement function of the welding machine 1.

[0026] For details regarding the specific structure of the threaded moving mechanism 5, please refer to [link / reference]. Figure 7 and Figure 8 It also includes two symmetrically arranged secondary mounting bases 51. A rotatable secondary shaft 52 is mounted at the center of each secondary mounting base 51 via a bearing. One end of one of the secondary shafts 52 is fitted with a knob cap 53. A horizontal limiting rod 56 is fixedly installed between the two secondary mounting bases 51. An externally threaded rod 55 is fixedly installed at the opposite ends of the two secondary shafts 52 via a coupling 54. The movable block 57 has an internally threaded hole 58 that is threaded onto the body of the externally threaded rod 55. The movable block 57 has a rotatable secondary shaft 56 that can move along the horizontal limiting rod 56. The axial sliding limiting hole 59 is provided on the top of the moving block 57, which is integrally structured with it and fixedly connected to the welding machine 1. The thread structure includes an internal thread structure provided on the inner wall of the internal thread hole 58 and an external thread structure provided on the body of the external thread rod 55. The internal thread structure and the external thread structure are adapted to each other. The cross-sectional shape of the limiting sliding hole 59 is consistent with the cross-sectional shape of the horizontal limiting rod 56, both of which are polygonal structures. The cross-sectional dimensions of the limiting sliding hole 59 are adapted to the cross-sectional dimensions of the horizontal limiting rod 56.

[0027] In use, a hydraulic device is used in conjunction with the hollow hydraulic rod 41, which is inserted into the center of the two circular rings 2. The hydraulic device is then connected to the inlet port of the hollow hydraulic rod 41 through a pipe. When the hydraulic device is started, liquid enters the first liquid flow hole 42 and finally flows into the interior of the moving chambers 44 of each component. Under liquid pressure, each arc-shaped contact plate 49 moves outward until each buffer pad 410 abuts against the inner circumference of the circular ring 2. Since multiple arc-shaped contact plates 49 move outward under the same pressure, the buffer pad 410 can achieve positioning of the circular ring 2 with a certain pressure. During the positioning process of the circular ring 2... The welding gap between the two circular rings 2 is controlled to ensure that the gap is in the appropriate position. The knob cap 53 is rotated in an directional manner. Due to the threaded connection, the rotation of the external thread rod 55 will cause the moving block 57 to move horizontally until the welding head of the welding machine 1 is at the welding gap. Then, the drive motor 38 is started, and its rotor will drive the double groove pulley 39 to rotate. Under the linkage of the synchronous belt 36, the two single groove pulleys 35 will drive the two No. 1 rotating shafts 33 to rotate synchronously. The rotating roller 34 will drive the circular ring 2 to rotate under the action of friction. The welding speed can be controlled by controlling the speed of the drive motor 38.

[0028] Although embodiments of the invention have been shown and described, 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 ring welding, comprising a welding machine (1) capable of welding circular parts (2), characterized in that: It also includes, The gravity-placed drive mechanism (3) includes two symmetrically arranged mounting bases (31), a rotating shaft (33) rotatably mounted between the two mounting bases (31), a rotating roller (34) mounted on the shaft of the rotating shaft (33) and capable of driving the circular part (2) to rotate, and a drive motor (38) capable of driving the two rotating shafts (33) to rotate. And a hydraulic fixing mechanism (4), the structure of which includes a hollow hydraulic rod (41) with a hollow internal structure, an arc-shaped contact plate (49) installed on the periphery of the hollow hydraulic rod (41) and capable of contacting the inner circumference of the circular part (2), and a piston plate (47) placed inside the hollow hydraulic rod (41) and capable of generating outward movement of the arc-shaped contact plate (49).

2. The laser welding apparatus for ring welding according to claim 1, characterized in that: The gravity-placed drive mechanism (3) also includes a motor fixing housing (37) installed at one end of one of the first mounting bases (31). A horizontal drive motor (38) is fixedly installed inside the motor fixing housing (37). A double-groove pulley (39) is fixedly fitted at the rotor end of the drive motor (38). Two V-shaped connecting ears (32) with an integral structure are provided above each of the first mounting bases (31). A rotating shaft (33) is installed between the two corresponding V-shaped connecting ears (32) through a bearing. Multiple rotating rollers (34) that rotate with it are fixedly installed on the shaft of each first shaft (33). A single-groove pulley (35) is fixedly fitted at the ends of the two first shafts (33). The single-groove pulley (35) and the double-groove pulley (39) are linked by a synchronous belt (36).

3. The laser welding apparatus for ring welding according to claim 2, characterized in that: The outer circumferential surface of the rotating roller (34) is provided with a layer of rubber material that can increase the friction between it and the outer circumferential surface of the circular part (2).

4. The laser welding apparatus for ring welding according to claim 3, characterized in that: The structural diameter of the outer circumference of the circular part (2) being processed is greater than the distance between the two rotating rollers (34).

5. A laser welding apparatus for ring welding according to claim 4, characterized in that: The hydraulic fixing mechanism (4) further includes a first liquid flow hole (42) disposed inside the hollow hydraulic rod (41) and equipped with a valve at one end. The hollow hydraulic rod (41) has multiple cylindrical protrusions (43) arranged in a ring array near its two ends. Each cylindrical protrusion (43) has a component movable cavity (44) inside. One end of the component movable cavity (44) is provided with a second liquid flow hole (45) connecting to the first liquid flow hole (42). The other end of the component movable cavity (44) is provided with a rod through hole (46) connecting to the external space. The cylindrical protrusion structure (43) has a piston plate (47) that can move axially along the component movable cavity (44) inside the component movable cavity (44). The piston plate (47) has a telescopic rod (48) that passes through the rod through hole (46) fixedly installed on the end face facing the rod through hole (46). The telescopic rod (48) has a coil spring (411) in a compressed state placed around the rod body inside the component movable cavity (44). An arc-shaped abutment plate (49) is fixedly installed at one end of the telescopic rod (48). A buffer pad (410) is fixedly installed on the outer convex surface of the arc-shaped abutment plate (49).

6. A laser welding apparatus for ring welding according to claim 5, characterized in that: The cross-sectional shape of the rod through hole (46) is consistent with the cross-sectional shape of the telescopic rod (48), both being polygonal structures, and the structural dimensions of the cross-sectional shape of the rod through hole (46) are adapted to the structural dimensions of the cross-sectional shape of the telescopic rod (48).

7. A laser welding apparatus for ring welding according to any one of claims 2-6, characterized in that: It also includes a threaded moving mechanism (5), the structure of which includes a moving block (57) that can drive the welding machine (1) to move horizontally, an external thread rod (55) installed at the center of the moving block (57) and capable of moving the moving block (57) when rotating, a horizontal limit rod (56) that can prevent the moving block (57) from rotating, and a knob cap (53) that can drive the external thread rod (55) to rotate.

8. A laser welding apparatus for ring welding according to claim 7, characterized in that: The threaded moving mechanism (5) also includes two symmetrically arranged second mounting bases (51). The center of the second mounting base (51) is equipped with a rotating second shaft (52) through a bearing. One end of the second shaft (52) is fitted with a knob cap (53). A horizontal limiting rod (56) is fixedly installed between the two second mounting bases (51). An external thread rod (55) is fixedly installed at the opposite ends of the two second shafts (52) through a coupling (54). The moving block (57) is provided with an internal thread hole (58) installed at the rod body of the external thread rod (55) through a threaded structure. The moving block (57) is provided with a limiting sliding hole (59) that can slide along the axial direction of the horizontal limiting rod (56). The top of the moving block (57) is provided with a fixed base plate (510) that is integral with it and fixedly connected to the welding machine (1).

9. A laser welding apparatus for ring welding according to claim 8, characterized in that: The threaded structure includes an internal threaded structure located on the inner wall of the internal threaded hole (58) and an external threaded structure located on the body of the external threaded rod (55), and the internal threaded structure is adapted to the external threaded structure.

10. A laser welding apparatus for ring welding according to claim 9, characterized in that: The cross-sectional shape of the limiting sliding hole (59) is consistent with the cross-sectional shape of the horizontal limiting rod (56), both being polygonal structures, and the structural dimensions of the cross-section of the limiting sliding hole (59) are adapted to the structural dimensions of the cross-section of the horizontal limiting rod (56).

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