Laser welding device for machining electric bicycle frame

Abstract

The invention belongs to the technical field of electric bicycle production, and particularly discloses a laser welding device for electric bicycle frame machining, which comprises a welding chamber, a preheating chamber and a cleaning chamber, and is characterized in that a mounting frame is fixedly mounted on the inner wall of one side of the welding chamber through bolts, and a ball sliding block is slidably connected into the mounting frame; the interior of the mounting frame is rotationally connected with a ball screw through a bearing, the ball screw is in threaded connection with the interior of the ball sliding block, a lifting motor is fixedly mounted on the outer wall of the top of the mounting frame through a bolt, and the output end of the lifting motor is fixedly connected with the ball screw through a coupler; the problems that an electric bicycle frame in a normal temperature state is directly welded, so that a heat affected area is enlarged, the physical performance of a welding area is changed, the welding quality is affected, and heat deformation and stress concentration are generated in the welding process, so that the welding quality is affected are solved. And the overall structural stability and the service life of the frame are influenced.

Description

Technical Field

[0001] The invention belongs to the technical field of electric bicycle production, and particularly relates to a laser welding device for processing an electric bicycle frame. Background Art

[0002] Laser welding, as a high-precision, high-efficiency welding technology, plays a vital role in modern manufacturing, including electric bicycle production. Electric bicycle frames are typically manufactured from thin-walled steel tubes (approximately 1.4 to 1.8 mm thick), and welding is a critical step in their processing. While laser welding offers advantages in efficiency, its practical application in welding such frames still presents significant technical challenges: Welding heat effects and deformation issues: Current common practices (especially manual welding) often involve laser welding the frame directly at room temperature. The high-energy-density laser beam rapidly heats the local area, causing the heat-affected zone to expand. This can adversely affect the physical properties of the metal in the weld area (such as hardness and toughness), directly impacting weld quality. More seriously, the thermal deformation and residual stress concentration generated during welding can significantly weaken the overall structural stability, precision, and long-term service life of the frame. Low automation and quality fluctuations: The welding process relies on operators holding a welding torch, resulting in a low level of automation. This method not only requires a high level of operator proficiency and experience, but is also prone to human factors (such as hand tremors, fatigue, and viewing angle errors), which can lead to inaccurate welding trajectories and inconsistent penetration depths. This results in unstable welding quality, impacting product reliability and consistency. Furthermore, manual welding is inefficient and cannot meet the needs of modern large-scale production. Operational safety hazards: The high-energy laser beam generated during laser welding and the strong diffuse light reflected from the workpiece surface pose a serious risk of irreversible damage to the operator's eyes. Open or semi-open welding environments make it difficult to effectively control the scattering of these harmful beams, placing a high pressure on operational safety protection. In order to solve the above defects, we propose a laser welding device for processing electric bicycle frames. Summary of the Invention

[0003] The object of the present invention is to provide a laser welding device for processing an electric bicycle frame to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a laser welding device for processing an electric bicycle frame, comprising a welding chamber, a preheating chamber and a cleaning chamber, characterized in that: a mounting bracket is fixedly installed on an inner wall of one side of the welding chamber by bolts, and a ball slider is slidably connected to the inside of the mounting bracket, a ball screw is rotatably connected to the inside of the mounting bracket through a bearing, and the ball screw is threadedly connected to the inside of the ball slider, a lifting motor is fixedly installed on the top outer wall of the mounting bracket by bolts, and the output end of the lifting motor is fixedly connected to the ball screw through a coupling, a telescopic rod is inserted into the inside of the ball slider, an electric telescopic rod is fixedly installed on the top outer wall of the ball slider by bolts, and the output end of the electric telescopic rod is fixedly connected to the telescopic rod by a screw, one end of the telescopic rod is rotatably connected to a rotating block, a rotating motor is fixedly installed on the outer wall of one side of the telescopic rod by bolts, and the output end of the rotating motor is key-connected to the inside of the rotating block; A laser welding machine is fixedly mounted on one side outer wall of the welding chamber by bolts, and a welding gun is preset at the output end of the laser welding machine, and the welding gun is fixedly mounted on the top outer wall of the rotating block by bolts. A host computer is fixedly mounted on the top outer wall of the laser welding machine by bolts, and the host computer is electrically connected to the laser welding machine, the exhaust pipe, the telescopic rod and the rotating motor respectively; A mounting rod is fixedly installed on the inner wall of one side of the preheating chamber by bolts, and a plurality of equally distributed heating wires are fixedly installed on the outer wall of the mounting rod by bolts, an air supply fan is fixedly installed on the top outer wall of the preheating chamber by bolts, and a temperature sensor is fixedly installed on the bottom inner wall of the preheating chamber by bolts, an exhaust groove is fixedly installed on the outer wall of one side of the preheating chamber by bolts, and a dustproof net is fixed inside the exhaust groove by screws, a positioning laser emitter is fixedly installed on the outer wall of one side of the preheating chamber by screws, and the positioning laser emitter, temperature sensor, air supply fan and heating wires are all electrically connected to the host computer.

[0005] Furthermore, a centrifugal fan is fixedly installed on the top outer wall of the welding chamber by bolts, and an exhaust pipe is plugged into the output end of the centrifugal fan. A photoelectric position sensor is fixedly installed on the top inner wall of the welding chamber by bolts, and the photoelectric position sensor and the centrifugal fan are electrically connected to the host computer.

[0006] Furthermore, a water distribution pipe is fixedly installed inside the cleaning room by a pipe clamp, and nozzles distributed at equal distances are threadedly connected to the side outer wall of the water distribution pipe. An air pump and a water pump are fixedly installed on the top outer wall of the cleaning room by bolts, and one end of the water distribution pipe is inserted into the output end of the air pump and the output end of the water pump. The air pump and the water pump are both electrically connected to the host computer.

[0007] Furthermore, a fixing bracket is fixedly installed on one side outer wall of the cleaning room by bolts, and a water tank and a purifier are fixedly installed on the top outer wall and the bottom outer wall of the fixing bracket by bolts respectively, the output end of the purifier and the input end of the water tank are interconnected, a water pumping pipe is connected to the output end of the water tank, and one end of the water pumping pipe originally connected to the water tank is inserted into the input end of the water pump, a return pipe is connected to the input end of the purifier, and one end of the return pipe passes through the interior of the cleaning room, and the output end of the water pump, the input end and the output end of the purifier are all threadedly connected with a one-way valve.

[0008] Furthermore, the interior of the purifier is fixed with equidistantly distributed filter screens by bolts, and the two adjacent layers of filter screens are filled with activated carbon filler and water treatment resin filler respectively. A sedimentation hole is opened on the bottom outer wall of the purifier, and a sedimentation cup is connected to the internal thread of the sedimentation hole.

[0009] Furthermore, a conveying track is fixedly installed on the top inner wall of the welding chamber, preheating chamber and cleaning chamber by bolts, and a hoisting mechanism is installed inside the conveying track; The hoisting mechanism includes a self-locking screw rod, a conveying structure, a rotating structure and a fixing structure.

[0010] Furthermore, the conveying structure includes two guide blocks, and rollers and guide wheels distributed at equal distances are rotatably connected on the bottom outer walls and side outer walls of the two guide blocks through bearings, and the guide blocks are rollingly connected to the inside of the conveying track through the rollers and guide wheels. A connecting plate is rotatably connected between the two guide blocks through bearings, and a fixing rod is fixedly installed on the bottom outer wall of the connecting plate by bolts; A conveying motor is fixedly installed on the top outer wall of the conveying track by bolts, and the output end key of the conveying motor is connected to the conveying gear. A flexible toothed belt is fixedly installed on the top outer wall of the guide block by bolts, and the flexible toothed belt is meshed with the conveying gear.

[0011] Furthermore, the rotating structure includes a protective shell, the bottom end of the fixing rod is fixedly mounted on the top outer wall of the protective shell by bolts, and a reducer is fixedly mounted inside the protective shell by bolts, a rotating motor is fixedly mounted on the top outer wall of the protective shell by bolts, and the output end of the rotating motor and the input end of the reducer are both keyed to gears, and two adjacent gears are connected in transmission via a toothed belt, the output end of the reducer is fixedly mounted on a top plate by bolts, and the top end of the self-locking screw is fixedly mounted on the bottom outer wall of the top plate by bolts, and the rotating motor is electrically connected to the host computer.

[0012] Furthermore, the fixing structure includes a telescopic sleeve, a lifting sleeve is welded to one end of the telescopic sleeve, and the lifting sleeve is rotatably connected to a rotating sleeve inside, the rotating sleeve is threadedly connected to the outside of the self-locking screw, and a conical gear sleeve is integrally formed on the side outer wall of the rotating sleeve, the interior of the telescopic sleeve is rotatably connected to a bevel gear through a bearing, and the bevel gear and the bevel gear sleeve are meshed with each other; An insert rod is inserted into one end of the telescopic sleeve away from the lifting sleeve, an adjusting screw is fixedly installed on the side inner wall of the insert rod by a bolt, and an adjusting screw sleeve is rotatably connected to the side inner wall of the lifting sleeve through a bearing, and the adjusting screw is threadedly connected to the inside of the adjusting screw sleeve; A fixed claw is welded on one end of the insertion rod away from the adjusting screw sleeve, and two movable claws are slidably connected inside the fixed claw, a telescopic cylinder is fixedly installed on one side outer wall of the fixed claw by bolts, and the output ends of the telescopic cylinder are respectively fixedly installed on one side outer wall of the two movable claws by bolts, guide holes distributed at equal distances are opened on one side outer wall of the fixed claw, guide rods distributed at equal distances are welded on one side outer wall of the movable claw, and the guide rods are inserted into the inside of the guide holes, and a protective pad and a pressure sensor are glued to one side outer wall of the movable claw; The telescopic cylinder and the pressure sensor are both electrically connected to the host computer.

[0013] Furthermore, a partition curtain is fixedly installed on one outer wall of the welding chamber, one outer wall of the preheating chamber, and one outer wall of the cleaning chamber by bolts, and the partition curtain separates the internal spaces of the welding chamber, the preheating chamber, and the cleaning chamber; Radiation-proof glass doors are rotatably connected to one side outer wall of the welding room and one side outer wall of the cleaning room through bearings, and a slide groove is provided on the top outer wall of the radiation-proof glass door. An opening and closing motor is fixedly installed on one side outer wall of the welding room and one side outer wall of the cleaning room through bolts, and the output end of the opening and closing motor is keyed to a rocker arm, and the end of the rocker arm away from the opening and closing motor is rotatably connected to the inside of the slide groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, before welding, the electric bicycle frame can be preheated in a preheating chamber. The preheating chamber can heat the entire frame to an appropriate temperature range so that it has a relatively uniform heat distribution when entering the welding stage. This preheating treatment can effectively slow down the heat input gradient of the material during the welding process, thereby significantly reducing the scope and extent of the welding heat-affected zone. Preheating can also improve the metal properties of the welding area, help to improve the plasticity and toughness of the weld metal, and make the weld denser and more uniform.

[0015] 2. In the present invention, the electric bicycle frame is fixed by a lifting mechanism, which can effectively achieve precise alignment of the welding parts and make the areas to be welded fit tightly, thereby providing a good foundation for subsequent welding operations. Moreover, since the lifting mechanism and the electric bicycle frame have the same specifications, after multiple groups of frames are fixed, their consistency in spatial position and shape can be guaranteed, which provides a reliable prerequisite for the upper computer to control the welding gun through a preset program for automatic welding, can reduce the requirements for manual technology, effectively reduce human errors, greatly improve welding efficiency, and can meet the needs of high efficiency and large-scale manufacturing in modern production.

[0016] 3. In the present invention, the welding process is completed inside the welding chamber, which not only effectively realizes the comprehensive control of the diffuse reflection light beam generated during the laser welding process, but also completely confines the high-energy laser beam and its reflected light within the closed space of the welding chamber, thereby effectively preventing the irreversible damage to the operator's eyes caused by the laser. It can also facilitate the centralized treatment of harmful gases generated during the welding process, thereby effectively reducing pollution to the environment, and meeting the strict requirements for environmental protection and occupational health and safety in modern industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 A cross-sectional view of the welding chamber structure of the present invention; Figure 3 It is a schematic diagram of the mounting frame structure of the present invention; Figure 4 This is a partially enlarged schematic diagram of structure A of the present invention; Figure 5 This is a cross-sectional view of the preheating chamber structure of the present invention; Figure 6 This is a schematic diagram of the clean room structure of the present invention; Figure 7 A cross-sectional view of the clean room structure of the present invention; Figure 8 It is a cross-sectional view of the purifier structure of the present invention; Figure 9 It is a schematic diagram of the transport track structure of the present invention; Figure 10 It is a structural schematic diagram of the hoisting mechanism of the present invention; Figure 11 It is a schematic diagram of the conveying structure of the present invention; Figure 12 This is an exploded schematic diagram of the rotating structure of the present invention; Figure 13 It is a schematic diagram of the fixing structure of the present invention; Figure 14 This is an exploded schematic diagram of the lifting sleeve structure of the present invention; Figure 15 This is a cross-sectional view of the telescopic sleeve structure of the present invention; Figure 16 It is a schematic structural diagram of the fixing claw of the present invention.

[0018] Figure: 1. Laser welding machine; 11. Welding gun; 12. Host computer; 2. Welding chamber; 21. Centrifugal fan; 211. Exhaust pipe; 22. Mounting frame; 221. Lifting motor; 222. Ball screw; 23. Ball slider; 231. Electric telescopic rod; 232. Telescopic rod; 233. Rotating block; 234. Rotating motor; 24. Partition curtain; 25. Radiation-proof glass door; 251. Slide; 26. Opening and closing motor; 261. Rocker; 27. Photoelectric position Sensor; 3. Preheating chamber; 31. Air supply fan; 32. Mounting rod; 321. Heating wire; 33. Exhaust slot; 331. Dust screen; 34. Temperature sensor; 35. Positioning laser transmitter; 4. Cleaning chamber; 41. Air pump; 42. Water pump; 421. One-way valve; 43. Fixing bracket; 431. Water storage tank; 432. Purifier; 4321. Filter; 4322. Activated carbon filler; 4323. Water treatment resin filler; 4324. Sedimentation hole; 432 5. Sedimentation cup; 433. Suction pipe; 434. Return pipe; 44. Water distribution pipe; 441. Nozzle; 5. Transport track; 51. Transport motor; 52. Transport gear; 6. Hoisting mechanism; 61. Self-locking screw; 62. Transport structure; 621. Guide block; 622. Roller; 623. Guide wheel; 624. Connecting plate; 63. Flexible toothed belt; 64. Rotating structure; 641. Fixed rod; 642. Protective shell; 643. Rotating motor; 644. Gear; 6 45. Reducer; 646. Top plate; 65. Fixed structure; 651. Lifting sleeve; 6511. Rotating sleeve; 6512. Conical gear sleeve; 6514. Conical gear; 652. Telescopic sleeve; 6521. Insert rod; 6522. Adjusting screw; 6523. Adjusting screw sleeve; 653. Fixed claw; 6531. Movable claw; 6532. Protective pad; 6533. Guide rod; 6534. Guide hole; 6535. Telescopic cylinder; 6536. Pressure sensor. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1 to 16The present invention provides a technical solution: a laser welding device for processing an electric bicycle frame, comprising a welding chamber 2, a preheating chamber 3 and a cleaning chamber 4, characterized in that: a mounting bracket 22 is fixedly installed on the inner wall of one side of the welding chamber 2 by bolts, and a ball slider 23 is slidably connected to the interior of the mounting bracket 22, a ball screw 222 is rotatably connected to the interior of the ball slider 23 through a bearing, and the ball screw 222 is threadedly connected to the interior of the ball slider 23, a lifting motor 221 is fixedly installed on the top outer wall of the mounting bracket 22 by bolts, and the model of the lifting motor 221 is preferably 35BYJ46, and the lifting motor 221 is used to drive the ball screw 222 to rotate, thereby causing the ball slider 23 threadedly connected to the outside of the ball screw 222 to move up and down, and the output end of the lifting motor 221 is connected to the outer wall of the ball screw 222. The coupling is fixedly connected to the ball screw 222, and a telescopic rod 232 is inserted into the interior of the ball slider 23. An electric telescopic rod 231 is fixedly installed on the top outer wall of the ball slider 23 by bolts. The model of the electric telescopic rod 231 is preferably YNT-01. The electric telescopic rod 231 is used to drive the telescopic rod 232 to extend and retract, thereby driving the welding gun 11 to move, and the output end of the electric telescopic rod 231 is fixedly connected to the telescopic rod 232 by a screw, and one end of the telescopic rod 232 is rotatably connected to a rotating block 233. A rotating motor 234 is fixedly installed on the outer wall of one side of the telescopic rod 232 by bolts. The model of the rotating motor 234 is preferably 17HS4401, used to drive the rotating block 233 to rotate, and the output end of the rotating motor 234 is key-connected to the interior of the rotating block 233; A laser welding machine 1 is fixedly installed on one side outer wall of the welding chamber 2 by bolts. The model of the laser welding machine 1 is preferably Hanslaser HSW-6000W, which is used to weld the electric bicycle frame, and a welding gun 11 is preset at the output end of the laser welding machine 1. The welding gun 11 is fixedly installed on the top outer wall of the rotating block 233 by bolts. A host computer 12 is fixedly installed on the top outer wall of the laser welding machine 1 by bolts. The host computer 12 is used to control the opening and closing of other electrical components, and the host computer 12 is electrically connected to the laser welding machine 1, the exhaust pipe 211, the telescopic rod 232 and the rotating motor 234 respectively. A mounting rod 32 is fixedly installed on the inner wall of one side of the preheating chamber 3 by bolts, and a plurality of heating wires 321 distributed at equal distances are fixedly installed on the outer wall of the mounting rod 32 by bolts. The heating wires 321 are used to preheat the frame of the electric bicycle. An air supply fan 31 is fixedly installed on the top outer wall of the preheating chamber 3 by bolts. The model of the air supply fan 31 is preferably APB15A2. The air supply fan 31 is used to drive the air flow in the preheating chamber 3 to make the preheating more uniform. A temperature sensor 34 is fixedly installed on the bottom inner wall of the preheating chamber 3 by bolts. The model of the temperature sensor 34 is preferably PT1000 for monitoring the preheating. The temperature of the electric bicycle frame in the heat chamber 3, an exhaust groove 33 is fixedly installed on the outer wall of one side of the preheating chamber 3 by bolts, and a dustproof net 331 is fixed inside the exhaust groove 33 by screws, and a positioning laser emitter 35 is fixedly installed on the outer wall of one side of the preheating chamber 3 by screws. The model of the positioning laser emitter 35A is preferably G-1016. The positioning laser emitter 35 is a fixed structure, and the visible laser it emits can assist the operator to determine the installation position and weld position of the electric bicycle frame, and the positioning laser emitter 35, temperature sensor 34, air supply fan 31 and heating wire 321 are all electrically connected to the host computer 12.

[0021] From the above description, it can be seen that the present invention has the following beneficial effects: In the present invention, before welding, the electric bicycle frame can be preheated by the preheating chamber 3, and the preheating chamber can heat the entire frame to an appropriate temperature range so that it has a relatively uniform heat distribution state when entering the welding stage. This preheating treatment can effectively slow down the heat input gradient of the material during the welding process, thereby significantly reducing the scope and degree of the welding heat affected zone. Preheating can also improve the metal properties of the welding area, help to improve the plasticity and toughness of the weld metal, and make the weld more dense and uniform.

[0022] Further, see Figure 5-8 A centrifugal fan 21 is fixedly installed on the top outer wall of the welding chamber 2 by bolts. The model of the centrifugal fan 21 is preferably SC80-1No, which is used to extract the exhaust gas inside the welding chamber 2, and the output end of the centrifugal fan 21 is plugged with an exhaust pipe 211. A photoelectric position sensor 27 is fixedly installed on the top inner wall of the welding chamber 2 by bolts. The model of the photoelectric position sensor 27 is preferably ML1000, which is used to detect the position of the electric bicycle frame, and the photoelectric position sensor 27 and the centrifugal fan 21 are both electrically connected to the host computer 12; A water distribution pipe 44 is fixedly installed inside the cleaning room 4 through a pipe clamp, and nozzles 441 distributed at equal distances are threadedly connected to the side outer wall of the water distribution pipe 44. The nozzles 441 are used to spray high-pressure airflow and water mist to achieve the purpose of cleaning. An air pump 41 and a water pump 42 are fixedly installed on the top outer wall of the cleaning room 4 by bolts. The model of the air pump 41 is preferably HG-370, which is used to input high-pressure gas to flush the surface of the electric bicycle frame. The model of the water pump 42 is preferably Z312-5004-3700, which is used to transport clean water. One end of the water distribution pipe 44 is plugged into the output end of the air pump 41 and the output end of the water pump 42. The air pump 41 and the water pump 42 are both electrically connected to the host computer 12; A fixing frame 43 is fixedly installed on the outer wall of one side of the cleaning room 4 by bolts, and a water tank 431 and a purifier 432 are fixedly installed on the top outer wall and the bottom outer wall of the fixing frame 43 respectively by bolts. The water tank 431 is used to store clean water, and the purifier 432 is used to purify and recover clean water for cleaning. The output end of the purifier 432 is connected to the input end of the water tank 431. The output end of the water tank 431 is connected to a water pumping pipe 433, and one end of the water pump 433 is connected to the input end of the water pump 42. The input end of the purifier 432 is connected to a return pipe 434, and one end of the return pipe 434 passes through the interior of the cleaning room 4. The output end of the water pump 42 and the input and output ends of the purifier 432 are all threadedly connected with a one-way valve 421. The one-way valve 421 can prevent the clean water from flowing back. The interior of the purifier 432 is fixed with equidistantly distributed filter screens 4321 by bolts, and the two adjacent layers of filter screens 4321 are respectively filled with activated carbon filler 4322 and water treatment resin filler 4323. The activated carbon filler 4322 and the water treatment resin filler 4323 are both used to filter and regenerate the recovered clean water. A sedimentation hole 4324 is provided on the bottom outer wall of the purifier 432. After the clean water enters the purifier 432 through the return pipe 434, large particles of debris will settle at the bottom of the purifier 432 and fall into the interior of the sedimentation cup 4325 through the sedimentation hole 4324. When cleaning, the operator can enter and remove the sedimentation cup 4325 to easily deal with the large particles of debris in the sedimentation cup 4325, and the internal thread of the sedimentation hole 4324 is connected to the sedimentation cup 4325.

[0023] Example 2: Please refer to Figures 1 to 16 As shown, based on the first embodiment, the present invention provides a technical solution: a conveying track 5 is fixedly installed on the top inner wall of the welding chamber 2, the preheating chamber 3 and the cleaning chamber 4 by bolts, and a hoisting mechanism 6 is installed inside the conveying track 5; The hoisting mechanism 6 includes a self-locking screw 61, a conveying structure 62, a rotating structure 64 and a fixing structure 65; The conveying structure 62 includes two guide blocks 621. Rollers 622 and guide wheels 623 equidistantly distributed are rotatably connected to the bottom and side outer walls of the two guide blocks 621 via bearings. The guide blocks 621 are rollingly connected to the interior of the conveying track 5 via the rollers 622 and guide wheels 623. A connecting plate 624 is rotatably connected between the two guide blocks 621 via bearings, and a fixing rod 641 is fixed to the bottom outer wall of the connecting plate 624 via bolts. A conveying motor 51 is fixedly mounted on the top outer wall of the conveying track 5 by bolts. The model of the conveying motor 51 is preferably Σ-5D, which is used to drive the hoisting mechanism 6 to move along the conveying track 5 through a flexible toothed belt 63. The output end of the conveying motor 51 is keyed to the conveying gear 52. The flexible toothed belt 63 is fixedly mounted on the top outer wall of the guide block 621 by bolts, and the flexible toothed belt 63 and the conveying gear 52 are meshed with each other. The rotating structure 64 includes a protective shell 642, the bottom end of the fixed rod 641 is fixedly mounted on the top outer wall of the protective shell 642 by bolts, and a reducer 645 is fixedly mounted inside the protective shell 642 by bolts, and a rotating motor 643 is fixedly mounted on the top outer wall of the protective shell 642 by bolts. The model of the rotating motor 643 is preferably EC-i90, which can be used to drive the top plate 646 and the self-locking screw 61 below to rotate, and the output end of the rotating motor 643 and the input end of the reducer 645 are key-connected with a gear 644, and the two adjacent gears 644 are connected by a toothed belt. The output end of the reducer 645 is fixedly mounted on the top plate 646 by bolts, and the top end of the self-locking screw 61 is fixedly mounted on the bottom outer wall of the top plate 646 by bolts. The rotating motor 643 is electrically connected to the host computer 12; The fixing structure 65 includes a telescopic sleeve 652, one end of which is welded with a lifting sleeve 651. The lifting sleeve 651 has a strip-shaped protrusion inside, and the self-locking screw rod 61 has a strip-shaped groove outside. The strip-shaped protrusion is stuck in the inside of the strip-shaped groove to prevent the lifting sleeve 651 from rotating outside the self-locking screw rod 61. The lifting sleeve 651 is internally connected to a rotating sleeve 6511, which is threadedly connected to the outside of the self-locking screw rod 61. The rotating sleeve 65 When the self-locking screw 61 rotates outside, it can move up and down along the self-locking screw 61, and a conical gear sleeve 6512 is integrally formed on the side outer wall of the rotating sleeve 6511. The interior of the telescopic sleeve 652 is rotatably connected to a conical gear 6514 through a bearing, and the conical gear 6514 and the conical gear sleeve 6512 are meshed with each other. When the conical gear 6514 is rotated, the conical gear 6514 can drive the conical gear sleeve 6512 and the rotating sleeve 6511 to rotate; An insert rod 6521 is inserted into the end of the telescopic sleeve 652 away from the lifting sleeve 651. An adjusting screw 6522 is fixedly mounted on the inner side wall of the insert rod 6521 via a bolt. An adjusting screw sleeve 6523 is rotatably connected to the inner side wall of the lifting sleeve 651 via a bearing. The adjusting screw 6522 is threadedly connected to the interior of the adjusting screw sleeve 6523. A fixed claw 653 is welded to one end of the insertion rod 6521 away from the adjusting screw sleeve 6523, and the interior of the fixed claw 653 is slidably connected to two movable claws 6531. A telescopic cylinder 6535 is fixedly installed on the outer wall of one side of the fixed claw 653 by bolts. The model of the telescopic cylinder 6535 is preferably SCPG2-L-00-16-75 / Z, which is used for clamping. The output ends of the telescopic cylinder 6535 are respectively fixedly installed on the outer wall of one side of the two movable claws 6531 by bolts. On one side, an outer wall of the fixed claw 653 is provided with guide holes 6534 distributed at equal distances. On one side, an outer wall of the movable claw 6531 is welded with guide rods 6533 distributed at equal distances, and the guide rods 6533 are inserted into the guide holes 6534. On one side, an outer wall of the movable claw 6531 is glued with a protective pad 6532 and a pressure sensor 6536. The protective pad 6532 is used to protect the surface of the electric bicycle frame. The pressure sensor 6536 is preferably a GEFRAN TPSADA series. The pressure sensor 6536 is used to monitor the clamping force of the movable claw 6531 on the electric bicycle frame to prevent damage to the surface of the bicycle frame. The telescopic cylinder 6535 and the pressure sensor 6536 are both electrically connected to the host computer 12.

[0024] By adopting the above technical solution, the lifting mechanism 6 fixes the electric bicycle frame, which can effectively achieve precise alignment of the welding parts and make the areas to be welded fit tightly, thereby providing a good foundation for subsequent welding operations. Moreover, since the lifting mechanism 6 and the electric bicycle frame have the same specifications, after multiple groups of frames are fixed, their consistency in spatial position and shape can be guaranteed, which provides a reliable prerequisite for the host computer 12 to control the welding gun 11 through a preset program for automated welding, can reduce the requirements for manual technology, effectively reduce human errors, greatly improve welding efficiency, and can meet the needs of high efficiency and large-scale manufacturing in modern production.

[0025] Further, see Figure 6 On one side outer wall of the welding chamber 2, on one side outer wall of the preheating chamber 3 and on one side outer wall of the cleaning chamber 4, a partition curtain 24 is fixed by bolts. The partition curtain 24 is made of relatively thick material and can play a sealing role to a certain extent to prevent the rapid passage of airflow. The partition curtain 24 separates the internal spaces of the welding chamber 2, the preheating chamber 3 and the cleaning chamber 4; A radiation-proof glass door 25 is rotatably connected to one side outer wall of the welding room 2 and one side outer wall of the cleaning room 4 through bearings. The radiation-proof glass door 25 can effectively block the reflection of the internal laser beam to prevent it from directly entering the operator's eyes, and a slide groove 251 is provided on the top outer wall of the radiation-proof glass door 25. An opening and closing motor 26 is fixedly installed on one side outer wall of the welding room 2 and one side outer wall of the cleaning room 4 by bolts. The model of the opening and closing motor 26 is preferably NEMA 17. The output end of the opening and closing motor 26 is keyed to a rocker arm 261, and the end of the rocker arm 261 away from the opening and closing motor 26 is rotatably connected to the inside of the slide groove 251. The opening and closing motor 26 can drive the radiation-proof glass door 25 to open and close through the rocker arm 261.

[0026] The working principle and usage process of the present invention are as follows: During preparation, the operator first uses professional software to enter the appropriate welding path of the welding gun 11 in the host computer 12 according to the required welding position, and adjusts the position of the positioning laser emitter 35 according to the position of the welding gun 11 so that it can point to the appropriate position to play an auxiliary positioning role. Then, the exhaust pipe 211 is connected to the external air purification device; During use, the operator first places various parts of the electric bicycle frame inside the fixed claw 653, and opens the telescopic cylinder 6535 after adjusting the position. At this time, the telescopic cylinder 6535 drives the two movable claws 6531 to move closer to each other, thereby clamping the electric bicycle frame. The operator can then extend or retract the adjusting screw 6522 by rotating the adjusting screw sleeve 6523, thereby driving the insertion rod 6521 to extend and retract, thereby fine-tuning the position of the electric bicycle frame on the X spatial axis. The operator can also rotate the adjusting knob 6513 to make the bevel gear 6514 drive the bevel gear sleeve 6512 and the rotating sleeve 6511 to rotate, thereby driving the lifting sleeve 651 to move up and down on the self-locking screw rod 61, so as to fine-tune the position of the electric bicycle frame on the Z spatial axis. Under the guidance and assistance of the positioning laser emitter 35, the weld position is tightly fitted and conforms to the spatial position prepared for welding. During operation, the conveying motor 51 drives the conveying gear 52 to rotate, and the conveying gear 52 drives the hoisting mechanism 6 to move on the conveying track 5 through the conveying structure 62, until the hoisting mechanism 6 first delivers the electric bicycle frame to be welded into the interior of the cleaning room 4. At this time, the air pump 41 blows high-pressure air into the interior of the water distribution pipe 44, and at the same time the water pump 42 processes clean water and sends it into the interior of the water distribution pipe 44. Finally, the air and clean water are sprayed out through the nozzle 441 to clean the surface of the electric bicycle frame to prevent dust and impurities on the surface of the electric bicycle frame from affecting During the welding process, the clean water dripping from the electric bicycle frame enters the interior of the collecting tank 45, and is then sent to the interior of the purifier 432 through the return pipe 434 for purification. The purified clean water enters the interior of the water storage tank 431 again, waiting to be used again. The cleaned electric bicycle frame is sent to the interior of the preheating chamber 3 again. At this time, the electric heating wire 321 inside the preheating chamber 3 dries and heats the electric bicycle frame, and the air supply fan 31 on the top of the preheating chamber 3 can drive the air flow, so that the water on the surface of the electric bicycle frame evaporates. To prevent the subsequent welding work from being affected, the heating of the heating wire 321 can also preheat the electric bicycle frame, so that the electric bicycle frame reaches a suitable temperature in advance. After a certain period of time, the electric bicycle frame is sent into the interior of the welding chamber 2. The exhaust pipe 211, the electric telescopic rod 231 and the rotating motor 234 inside the welding chamber 2 drive the welding gun 11 to move on the Z axis and the X axis under the control of the host computer 12, and can rotate along the Y axis to weld various positions of the electric bicycle frame. During the welding process, the upper computer The machine 12 can also control the start of the rotating motor 643, which can drive the top plate 646 to rotate along the Z axis through the gear 644 and the reducer 645. The top plate 646 drives the electric bicycle frame to rotate along the Z axis through the self-locking screw 61, so as to facilitate the welding of the electric bicycle frame by the welding gun 11. After the welding is completed, the upper computer 12 controls the start and close motor 26 to start, and the start and close motor 26 drives the swing arm 261 to rotate, thereby pushing the radiation-proof glass door 25 to open. At this time, the welded electric bicycle frame can be removed by the operator. The above working process is the complete processing sequence of a single electric bicycle frame. During use, the operator can fix multiple electric bicycle frames on the lifting mechanism 6 at the same time. The device can send multiple electric bicycle frames into the cleaning room 4, preheating room 3, and welding room 2 for processing in turn, so that the cleaning room 4, preheating room 3 and welding room 2 can work at the same time to process different electric bicycle frames, which is more efficient.

[0027] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0028] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A laser welding device for processing an electric bicycle frame, comprising a welding chamber (2), a preheating chamber (3) and a cleaning chamber (4), characterized in that: A mounting frame (22) is fixedly mounted on an inner wall of one side of the welding chamber (2) by means of bolts, and a ball slider (23) is slidably connected to the interior of the mounting frame (22), a ball screw (222) is rotatably connected to the interior of the mounting frame (22) via a bearing, and the ball screw (222) is threadedly connected to the interior of the ball slider (23), a lifting motor (221) is fixedly mounted on an outer wall of the top of the mounting frame (22) by means of bolts, and an output end of the lifting motor (221) is fixedly connected to the ball screw (222) via a coupling, and the ball screw (222) is screwed to the interior of the ball slider (23). A telescopic rod (232) is inserted into the interior of the slider (23), an electric telescopic rod (231) is fixedly mounted on the top outer wall of the ball slider (23) by means of bolts, and an output end of the electric telescopic rod (231) is fixedly connected to the telescopic rod (232) by means of screws, one end of the telescopic rod (232) is rotatably connected to a rotating block (233) by means of a bearing, a rotating motor (234) is fixedly mounted on one outer wall of the telescopic rod (232) by means of bolts, and the output end of the rotating motor (234) is key-connected to the interior of the rotating block (233); A laser welding machine (1) is fixedly mounted on one side outer wall of the welding chamber (2) by means of bolts, and a welding gun (11) is preset at the output end of the laser welding machine (1), and the welding gun (11) is fixedly mounted on the top outer wall of the rotating block (233) by means of bolts. A host computer (12) is fixedly mounted on the top outer wall of the laser welding machine (1) by means of bolts, and the host computer (12) is electrically connected to the laser welding machine (1), the exhaust pipe (211), the telescopic rod (232), and the rotating motor (234), respectively. A mounting rod (32) is fixedly mounted on the inner wall of one side of the preheating chamber (3) by means of bolts, and a plurality of equally spaced heating wires (321) are fixedly mounted on the outer wall of the mounting rod (32) by means of bolts, an air supply fan (31) is fixedly mounted on the top outer wall of the preheating chamber (3) by means of bolts, and a temperature sensor (34) is fixedly mounted on the bottom inner wall of the preheating chamber (3) by means of bolts, an exhaust groove (33) is fixedly mounted on the outer wall of one side of the preheating chamber (3) by means of bolts, and a dustproof net (331) is fixedly mounted inside the exhaust groove (33) by means of screws, a positioning laser emitter (35) is fixedly mounted on the outer wall of one side of the preheating chamber (3) by means of screws, and the positioning laser emitter (35), the temperature sensor (34), the air supply fan (31) and the heating wire (321) are all electrically connected to the host computer (12).

2. The laser welding device for processing an electric bicycle frame according to claim 1, characterized in that: A centrifugal fan (21) is fixedly mounted on the top outer wall of the welding chamber (2) by means of bolts, and an exhaust pipe (211) is plugged into the output end of the centrifugal fan (21). A photoelectric position sensor (27) is fixedly mounted on the top inner wall of the welding chamber (2) by means of bolts, and both the photoelectric position sensor (27) and the centrifugal fan (21) are electrically connected to the host computer (12).

3. The laser welding device for processing an electric bicycle frame according to claim 1, characterized in that: A water distribution pipe (44) is fixedly installed inside the cleaning room (4) through a pipe clamp, and nozzles (441) distributed at equal distances are threadedly connected to the side outer wall of the water distribution pipe (44). An air pump (41) and a water pump (42) are fixedly installed on the top outer wall of the cleaning room (4) through bolts, and one end of the water distribution pipe (44) is inserted into the output end of the air pump (41) and the output end of the water pump (42). The air pump (41) and the water pump (42) are both electrically connected to the host computer (12).

4. The laser welding device for processing an electric bicycle frame according to claim 3, characterized in that: A fixing frame (43) is fixedly mounted on one side outer wall of the cleaning chamber (4) by means of bolts, and a water tank (431) and a purifier (432) are fixedly mounted on the top outer wall and the bottom outer wall of the fixing frame (43) by means of bolts, respectively. The output end of the purifier (432) and the input end of the water tank (431) are mutually connected. A water pumping pipe (433) is plugged into the output end of the water tank (431), and one end of the water pumping pipe (433) is plugged into the input end of the water pump (42). A return pipe (434) is plugged into the input end of the purifier (432), and one end of the return pipe (434) passes through the interior of the cleaning chamber (4). The output end of the water pump (42), the input end, and the output end of the purifier (432) are all threadedly connected to a one-way valve (421).

5. The laser welding device for processing an electric bicycle frame according to claim 4, characterized in that: The interior of the purifier (432) is fixed with equidistantly distributed filter screens (4321) by bolts, and two adjacent layers of filter screens (4321) are respectively filled with activated carbon filler (4322) and water treatment resin filler (4323). A sedimentation hole (4324) is opened on the outer wall of the bottom of the purifier (432), and a sedimentation cup (4325) is connected to the internal thread of the sedimentation hole (4324).

6. The laser welding device for processing an electric bicycle frame according to claim 4, characterized in that: A transport track (5) is fixedly mounted on the top inner wall of the welding chamber (2), the preheating chamber (3) and the cleaning chamber (4) by means of bolts, and a hoisting mechanism (6) is mounted inside the transport track (5); The hoisting mechanism (6) comprises a self-locking screw (61), a conveying structure (62), a rotating structure (64) and a fixing structure (65).

7. The laser welding device for processing an electric bicycle frame according to claim 6, characterized in that: The conveying structure (62) includes two guide blocks (621), and rollers (622) and guide wheels (623) distributed at equal distances are rotatably connected on the bottom outer walls and side outer walls of the two guide blocks (621) via bearings, and the guide blocks (621) are rollingly connected to the inside of the conveying track (5) via the rollers (622) and guide wheels (623). A connecting plate (624) is rotatably connected between the two guide blocks (621) via bearings, and a fixing rod (641) is fixedly installed on the bottom outer wall of the connecting plate (624) via bolts. A conveying motor (51) is fixedly mounted on the top outer wall of the conveying track (5) by means of bolts, and the output end of the conveying motor (51) is key-connected to a conveying gear (52). A flexible toothed belt (63) is fixedly mounted on the top outer wall of the guide block (621) by means of bolts, and the flexible toothed belt (63) and the conveying gear (52) are meshed with each other. The conveying motor (51) is electrically connected to the host computer (12).

8. The laser welding device for processing an electric bicycle frame according to claim 7, characterized in that: The rotating structure (64) includes a protective shell (642), the bottom end of the fixing rod (641) is fixedly mounted on the top outer wall of the protective shell (642) by bolts, and a reducer (645) is fixedly mounted inside the protective shell (642) by bolts, a rotating motor (643) is fixedly mounted on the top outer wall of the protective shell (642) by bolts, and the output end of the rotating motor (643) and the input end of the reducer (645) are key-connected with a gear (644), and two adjacent gears (644) are connected in transmission via a toothed belt, the output end of the reducer (645) is fixedly mounted with a top plate (646) by bolts, and the top end of the self-locking screw rod (61) is fixedly mounted on the bottom outer wall of the top plate (646) by bolts, and the rotating motor (643) is electrically connected to the host computer (12).

9. The laser welding device for processing an electric bicycle frame according to claim 6, characterized in that: The fixed structure (65) comprises a telescopic sleeve (652), one end of the telescopic sleeve (652) is welded with a lifting sleeve (651), and the lifting sleeve (651) is rotatably connected to a rotating sleeve (6511) inside, the rotating sleeve (6511) is threadedly connected to the outside of the self-locking screw (61), and a conical gear sleeve (6512) is integrally formed on the side outer wall of the rotating sleeve (6511), the interior of the telescopic sleeve (652) is rotatably connected to a conical gear (6514) via a bearing, and the conical gear (6514) and the conical gear sleeve (6512) are meshed with each other; An insert rod (6521) is inserted into one end of the telescopic sleeve (652) away from the lifting sleeve (651), an adjusting screw (6522) is fixedly mounted on the side inner wall of the insert rod (6521) via a bolt, and an adjusting screw sleeve (6523) is rotatably connected to the side inner wall of the lifting sleeve (651) via a bearing, and the adjusting screw sleeve (6522) is threadedly connected to the inside of the adjusting screw sleeve (6523); A fixed claw (653) is welded to one end of the insertion rod (6521) away from the adjusting screw sleeve (6523), and two movable claws (6531) are slidably connected inside the fixed claw (653). A telescopic cylinder (6535) is fixedly mounted on one side outer wall of the fixed claw (653) by means of bolts, and the output ends of the telescopic cylinder (6535) are respectively fixedly mounted on one side outer wall of the two movable claws (6531) by means of bolts. Guide holes (6534) distributed at equal distances are opened on one side outer wall of the fixed claw (653). Guide rods (6533) distributed at equal distances are welded to one side outer wall of the movable claw (6531), and the guide rods (6533) are inserted into the inside of the guide holes (6534). A protective pad (6532) and a pressure sensor (6536) are glued to one side outer wall of the movable claw (6531). The telescopic cylinder (6535) and the pressure sensor (6536) are both electrically connected to the host computer (12).

10. The laser welding device for processing an electric bicycle frame according to claim 1, characterized in that: A partition curtain (24) is fixedly installed on one side outer wall of the welding chamber (2), one side outer wall of the preheating chamber (3), and one side outer wall of the cleaning chamber (4) by means of bolts, and the partition curtain (24) separates the internal spaces of the welding chamber (2), the preheating chamber (3), and the cleaning chamber (4); A radiation-proof glass door (25) is rotatably connected to one side outer wall of the welding room (2) and one side outer wall of the cleaning room (4) via a bearing, and a slide groove (251) is provided on the top outer wall of the radiation-proof glass door (25). An opening and closing motor (26) is fixedly installed on one side outer wall of the welding room (2) and one side outer wall of the cleaning room (4) via bolts, an output end of the opening and closing motor (26) is key-connected to a rocker (261), and an end of the rocker (261) away from the opening and closing motor (26) is rotatably connected to the inside of the slide groove (251), and the opening and closing motor (26) is electrically connected to the host computer (12).

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