Iron core laser coding equipment

Abstract

The application relates to the technical field of laser coding equipment, in particular to an iron core laser coding equipment which comprises a laser coding machine, a rack assembly and a feeding assembly, a sliding table assembly is arranged on the inner side of the rack assembly, a cleaning frame assembly, a rotating assembly, a polishing assembly and a beating assembly are arranged at the front end of the sliding table assembly, the rotating assembly comprises a rotating shell, a receiving cavity is arranged on the inner side of the rotating shell, a gas chamber fixing plate and a mounting plate are fixedly connected to the inner side of the rotating shell, a first electromagnetic valve is fixedly connected to the left side of the mounting plate, a one-way valve is fixedly connected to the inner side of the gas chamber fixing plate, a blast pipe assembly is fixedly connected to the inner side of the rotating shell, the polishing assembly comprises a flexible polishing belt, dust suction channels and dust suction holes are arranged on the inner side of the flexible polishing belt, shaft seat assemblies are fixedly connected to the two sides of the flexible polishing belt, when the device codes the iron core, the surrounding insulation coating is not excessively damaged during cleaning, the risk of carbonization of the insulation layer caused by laser coding can be effectively avoided, and the surface protection structure of the iron core is protected.

Description

Technical Field

[0001] This invention relates to the field of laser marking equipment technology, specifically to a laser marking device for iron cores. Background Technology

[0002] The iron core is a core component of the magnetic circuit, formed by stamping and tightly stacking multiple layers of thin silicon steel sheets. It is mainly used in automotive motors, transformers, and stators and rotors of electrical appliances. Relying on the low iron loss and high magnetic permeability of silicon steel, it is used to concentrate and conduct magnetic fields, reduce eddy current losses and heat generation, and plays a key role in concentrating and guiding magnetic fields, improving electromagnetic conversion efficiency, and reducing vibration and noise. It is an indispensable basic core component of motors and electromagnetic equipment. The stator core used in automotive motors is the core magnetic component for electromagnetic energy conversion. To achieve full life-cycle traceability of parts, production batch management, and quality traceability control, the stator core or rotor core needs to be marked with laser marking. Laser marking of automotive stator cores is usually set on the side of the core laminations. This method can avoid damage to the magnetic circuit structure of the core and does not weaken the overall stacking and fastening strength of the core. During the laser marking process on the side wall of automotive stator cores, the side wall surface often has residual molten metal spatter, iron oxide layer, and a small amount of vaporized insulating varnish residue. When the high-energy laser beam acts on the working area, various surface deposits are prone to combustion and thermal decomposition reactions at high temperatures. The released heat is rapidly conducted and diffused to the surrounding area, causing the insulating coating adjacent to the marking area to be baked by high temperature and exhibit scorching and carbonization. This results in local structural damage to the insulating layer, and the insulation performance may be reduced or even fail. When pre-treating and cleaning the surface of iron cores, including molten metal spatter, iron oxide oxide layers, and small amounts of vaporized insulating varnish residue, existing methods struggle to precisely control the cleaning boundaries and effective working areas. Insufficient cleaning range fails to completely remove residual impurities around the marking area, making it impossible to avoid the risk of carbonization damage caused by laser irradiation. Excessive cleaning range can easily corrode and damage the surrounding insulating coating, destroying the original surface protective layer structure of the iron core. Therefore, an iron core laser marking device is proposed to address these issues. Summary of the Invention

[0003] The purpose of this invention is to provide a laser marking device for iron cores to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A laser marking device for iron cores includes a laser marking machine, a frame assembly, and a feeding assembly. A slide assembly is mounted inside the frame assembly. A cleaning frame assembly, a rotating assembly, a grinding assembly, and a tapping assembly are mounted at the front end of the slide assembly. The rotating assembly includes a rotating shell with a storage cavity inside. An air chamber fixing plate and a mounting plate are fixedly connected to the inside of the rotating shell. A first solenoid valve is fixedly connected to the left side of the mounting plate. A one-way valve is fixedly connected to the inside of the air chamber fixing plate. A duct assembly is fixedly connected to the inside of the rotating shell. The grinding assembly includes a flexible grinding belt with a dust suction channel and a dust suction hole inside. Shaft seat assemblies are fixedly connected to both sides of the flexible grinding belt. A receiving assembly is mounted on the outside of the shaft seat assembly. A fixing seat is threadedly connected to the inside of the receiving assembly. Both the fixing seat and the air chamber fixing plate are fixedly connected to a venturi tube.

[0005] As a further optimization of the present invention, the frame assembly includes a frame base, a first slide rail and a second slide rail are provided on the inner side of the frame base, a rear end plate is fixedly connected to the rear end of the frame base, the front end of the rear end plate is fixedly connected to the cylinder body of a first electric hydraulic cylinder, the first electric hydraulic cylinder is embedded in the inner side of the second slide rail, a front end plate is fixedly connected to the front end of the frame base, the rear end of the front end plate is fixedly connected to the cylinder body of the second electric hydraulic cylinder, a push plate is fixedly connected to the rear end of the piston rod of the second electric hydraulic cylinder, the push plate is slidably connected to the inner side of the first slide rail, and a positioning roller is rotatably connected to the rear end of the push plate.

[0006] As a further optimization of the present invention, the feeding assembly includes a conveyor frame, the bottom end of which is fixedly connected to the top end of the frame base. A push plate and a positioning roller are installed at the front end of the rear end plate. The conveyor frame is located between two push plates. A conveying roller is rotatably connected to the inner side of the conveyor frame. The conveying roller is driven by a first servo motor. A floating roller shaft is rotatably connected to the inner side of the conveyor frame. A floating cylinder roller is slidably connected to the outer side of the floating roller shaft. A first spring is attached to both the front end and the rear end of the floating cylinder roller. The first spring is fixedly connected to the side of the conveyor frame.

[0007] As a further optimization of the present invention, the slide assembly includes a slide, which is slidably connected to the inner side of the second slide rail. The piston rod end of the first electro-hydraulic cylinder is fixedly connected to the rear end of the slide. The bottom end of the slide is fixedly connected to the housing of the second servo motor. A rotary table is fixedly connected to the end of the main shaft of the second servo motor. The rotary table is rotatably connected to the inner side of the slide through a bearing.

[0008] As a further optimization of the present invention, the rotary table, the upright frame, and the machine plate are fixedly connected by bolts. The top of the machine plate is fixedly connected to the housing of the third servo motor. A lead screw is fixedly connected to the end of the main shaft of the third servo motor. A guide post is fixedly connected between the rotary table and the machine plate. The lower end of the lead screw is rotatably connected to the inner side of the rotary table. A lifting seat is threadedly connected to the outer side of the lead screw. The inner side of the lifting seat is slidably connected to the outer side of the guide post. A linear module is fixedly connected to the rear end of the lifting seat. A laser marking machine is fixedly connected to the rear end of the sliding plate of the linear module.

[0009] As a further optimization of the present invention, the cleaning frame assembly includes a main frame, the rear end of which is fixedly connected to the front end of the lifting seat, a fifth servo motor is fixedly connected to the right side of the main frame, a drive shaft is fixedly connected to the end of the main shaft of the fifth servo motor, the front end of the main frame is rotatably connected to the drive shaft through a bearing, and a dust collection pipe is rotatably connected to the front end of the main frame through a bearing.

[0010] As a further optimization of the present invention, a first sealing plate is fixedly connected to one side of the drive shaft, an air pump is fixedly connected to the right side of the first sealing plate, the left side of the first sealing plate is sealed to the Venturi tube through an annular rubber gasket, the air nozzle of the dust collection pipe extends to the inside of the Venturi tube, and the first sealing plate and the rotating shell are fixedly connected by bolts.

[0011] As a further optimization of the present invention, wherein: a filter element is threadedly connected to the inner side of the dust collection pipe, the filter element is a hollow structure, the inner side of the filter element is connected to the inner side of the dust collection pipe, a filter plate is fixedly connected to the inner side of the filter element, the side of the filter element is sealed to the dust collection pipe by a first rubber ring, a second sealing plate is fixedly connected to one side of the dust collection pipe, the second sealing plate is fixedly connected to the rotating shell by bolts, a first through hole is opened on the inner side of the second sealing plate, the first through hole of the second sealing plate is connected to the inner side of the dust collection pipe, and a second rubber ring is used to seal one side of the second sealing plate to one side of the valve port of the first solenoid valve.

[0012] As a further optimization of the present invention, the following features are provided: a sliding hole is provided on the inner side of the rotating shell; a third rubber ring is fixedly connected to the inner side of the sliding hole of the rotating shell; an internal column is slidably connected to the inner side of the sliding hole of the rotating shell; a horizontal plate is fixedly connected to one end of the internal column; a silicone tapping head is fixedly connected to the side of the horizontal plate; a return spring is fixedly connected to the other end of the internal column; the internal column extends between the rotating shell and the duct assembly; the return spring is fixedly connected to the inner side of the rotating shell; the duct assembly includes an internal cylinder; a second through hole is provided on the inner side of the internal cylinder; a second solenoid valve is fixedly connected to the internal cylinder near the second through hole; a gap is provided between the second solenoid valve and the inner side of the rotating shell; and the right end of the internal cylinder is located between two Venturi tubes.

[0013] As a further optimization of the present invention, the shaft assembly includes a connecting shaft, a first friction disk, a second friction disk, and a rotating shaft sleeved on the outer side of the connecting shaft. The connecting shaft and the second friction disk are fixed by bolts. The connecting shaft extends to the inner side of the connecting shell. A dust suction channel and a rubber ring are fixedly connected to the inner side of the connecting shell. The connecting shaft and the connecting shell are sealed by the rubber ring. The side of the first friction disk is in contact with one end of the second spring. The first friction disk and the second friction disk are in contact. An internal thread is provided on the inner side of the connecting shell. The inner side of the internal thread is threaded to the fixed seat. One side of the connecting shell is sealed to the fixed seat by a sealing gasket. The first friction disk slides on the inner side of the connecting shell. The outer side of the rotating shaft and the outer side of the second friction disk both slide on the inner side of the connecting shell.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the device achieves position positioning and correction of the stator core through the set conveying roller, floating roller and positioning roller, so that the core axis is accurately aligned with the laser marking machine, providing a stable and reliable positioning foundation for subsequent laser marking operations, while effectively reducing the scratches on the core surface during the correction process and avoiding damage to the insulating coating on the core surface. 2. In this invention, the device can be adapted to stator cores of various specifications by setting flexible grinding belt, first friction disc and second friction disc, controlling the cleaning range around the marking area, removing metal spatter, oxide layer and insulating varnish residue fastened to the core, while avoiding damage to the insulating coating of non-working areas. 3. In this invention, the device can simultaneously collect metal dust, oxide scale debris and insulating varnish powder generated during grinding and cleaning by setting a venturi tube, dust collection tube and filter element, avoiding dust dispersion and pollution of the working environment. The filter element adopts a detachable structure, which is convenient for regular replacement and maintenance, and can also improve the operational stability of the beater component and prevent it from falling off under the action of centrifugal force. 4. In this invention, the loose dust remaining on the surface of the iron core is cleaned a second time by setting a silicone tapping head, an internal column, and a reset spring, which further improves the cleanliness of the iron core surface, ensures the cleaning effect, keeps the area of ​​the iron core to be marked smooth and clean, and avoids the problem of high temperature burning and carbonization of the insulation coating in the adjacent area caused by residual impurities during marking, thus effectively improving the quality of laser marking. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the feeding component structure of the present invention; Figure 3 This is a schematic diagram of the floating roller structure of the present invention; Figure 4 This is a schematic diagram of the rack assembly structure of the present invention; Figure 5 This is a schematic diagram of the slide assembly structure of the present invention; Figure 6 This is a schematic diagram of the laser marking machine structure of the present invention; Figure 7 This is a schematic diagram of the disassembled structure of the slide assembly of the present invention; Figure 8 This is a schematic diagram of the cleaning rack assembly structure of the present invention; Figure 9 This is a cross-sectional structural diagram of the rotating component of the present invention; Figure 10 This is a cross-sectional structural diagram of the cleaning rack assembly of the present invention; Figure 11 This is a schematic diagram of the rotating shell structure of the present invention; Figure 12 This is one of the cross-sectional structural schematic diagrams of the grinding component of the present invention; Figure 13 This is a second cross-sectional structural diagram of the grinding component of the present invention; Figure 14 For the present invention Figure 13 A schematic diagram of the structure at point A; Figure 15 This is a schematic diagram of the duct assembly structure of the present invention; Figure 16 This is a cross-sectional structural diagram of the tapping component of the present invention; Figure 17 For the present invention Figure 16 A schematic diagram of the structure at point B.

[0016] In the picture: 1. Laser marking machine; 2. Frame assembly; 21. Frame base; 22. First slide rail; 23. Second slide rail; 24. Rear end plate; 25. First electric hydraulic cylinder; 26. Front end plate; 27. Second electric hydraulic cylinder; 28. Push plate; 29. ​​Positioning roller; 3. Feeding assembly; 31. Conveyor frame; 32. Conveyor roller; 33. Floating drum roller; 34. Floating roller shaft; 35. First spring; 4. Slide assembly; 41. Slide; 42. Second servo motor; 43. Turntable; 44. Stand; 45. Machine plate; 46. Third servo motor; 47. Lead screw; 48. Guide column; 49. Lifting seat; 5. Cleaning rack assembly; 51. Main frame; 52. Fifth servo motor; 53. Drive shaft; 54. First sealing plate; 55. Air pump; 56. Dust collection pipe; 57. Second sealing plate; 58. Filter element; 6. Rotating assembly; 61. Rotating housing; 62. First solenoid valve; 63. Air chamber fixing plate; 64. Mounting plate; 65. Receiving cavity; 66. Venturi tube; 67. One-way valve; 68. Duct assembly; 681. Internal cylinder; 682. Second solenoid valve; 7. Grinding assembly; 71. Flexible grinding belt; 72. Dust suction channel; 73. Dust suction hole; 74. Shaft seat assembly; 741. Connecting shaft; 742. First friction disc; 743. Second friction disc; 744. Rotating shaft; 75. Receiving assembly; 751. Connecting shell; 752. Second spring; 753. Rubber ring; 754. Internal thread; 755. Sealing gasket; 76. Fixing seat; 8. Tapping assembly; 81. Horizontal plate; 82. Silicone tapping head; 83. Return spring; 84. Built-in column; 9. Linear module. Detailed Implementation

[0017] 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.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] Please see Figures 1-17 The present invention provides a technical solution: A laser marking device for iron cores includes a laser marking machine 1, a frame assembly 2, and a feeding assembly 3. A slide assembly 4 is installed inside the frame assembly 2. A cleaning frame assembly 5, a rotating assembly 6, a grinding assembly 7, and a tapping assembly 8 are installed at the front end of the slide assembly 4. The rotating assembly 6 includes a rotating shell 61 with a receiving cavity 65 inside. An air chamber fixing plate 63 and a mounting plate 64 are fixedly connected inside the rotating shell 61. A first solenoid valve 62 is fixedly connected to the left side of the mounting plate 64. A one-way valve 67 is fixedly connected to the inner side of the fixed plate 63, and an air duct assembly 68 is fixedly connected to the inner side of the rotating shell 61. The grinding assembly 7 includes a flexible grinding belt 71. A dust suction channel 72 and a dust suction hole 73 are opened on the inner side of the flexible grinding belt 71. A bearing assembly 74 is fixedly connected to both sides of the flexible grinding belt 71. A receiving assembly 75 is installed on the outer side of the bearing assembly 74. A fixing seat 76 is threadedly connected to the inner side of the receiving assembly 75. The fixing seat 76 and the air chamber fixing plate 63 are both fixedly connected to the venturi tube 66.

[0020] As a further implementation of this solution, the frame assembly 2 includes a frame base 21. A first slide rail 22 and a second slide rail 23 are provided on the inner side of the frame base 21. A rear end plate 24 is fixedly connected to the rear end of the frame base 21. The front end of the rear end plate 24 is fixedly connected to the cylinder body of a first electro-hydraulic cylinder 25. The first electro-hydraulic cylinder 25 is embedded in the inner side of the second slide rail 23. A front end plate 26 is fixedly connected to the front end of the frame base 21. The rear end of the front end plate 26 is fixedly connected to the cylinder body of a second electro-hydraulic cylinder 27. A push plate 28 is fixedly connected to the rear end of the piston rod of the second electro-hydraulic cylinder 27. The push plate 28 is slidably connected to the inner side of the first slide rail 22. The rear end of the push plate 28 is rotatably connected to the positioning roller 29. With the above configuration, the frame base 21 is provided with the first slide rail 22 and the second slide rail 23, which can provide regular guidance for the movement of the push plate 28 and the slide table 41. The front end plate 26 and the rear end plate 24 respectively form a stable installation support for the second electric hydraulic cylinder 27 and the first electric hydraulic cylinder 25. The push plate 28 slides smoothly along the first slide rail 22, driving the positioning roller 29 to clamp and center the stator core. The positioning roller 29 adopts a rotatable installation structure, which can reduce the hard friction with the surface of the core during the correction process, avoid the outer insulating coating of the core being scratched and damaged, and ensure the positioning accuracy of subsequent laser marking. As a further implementation of this solution, the feeding assembly 3 includes a conveyor frame 31. The bottom end of the conveyor frame 31 is fixedly connected to the top end of the frame base 21. A push plate 28 and a positioning roller 29 are installed at the front end of the rear end plate 24. The conveyor frame 31 is located between the two push plates 28. A conveying roller 32 is rotatably connected to the inner side of the conveyor frame 31. The conveying roller 32 is driven by a first servo motor. A floating roller shaft 34 is rotatably connected to the inner side of the conveyor frame 31. A floating drum roller 33 is slidably connected to the outer side of the floating roller shaft 34. A first spring 3 is attached to both the front end and the rear end of the floating drum roller 33. 5. The first spring 35 is fixedly connected to the side of the conveyor frame 31. Through the above arrangement, the conveyor frame 31 and the frame base 21 are fixedly connected as one, and the overall structure has strong stability. The conveyor roller 32 can smoothly convey the stator core to the positioning station. The floating roller 33 can slide flexibly along the floating roller shaft 34. Together with the first spring 35, it forms an adaptive buffer structure. When correcting the position of the core, it can adaptively fine-tune with the core. It can not only assist the core to be accurately aligned and adapt to the placement of cores of different specifications, but also buffer the clamping force and avoid the core deformation and surface damage caused by rigid pushing. As a further implementation of this solution, the slide assembly 4 includes a slide 41, which is slidably connected to the inner side of the second slide rail 23. The piston rod end of the first electric hydraulic cylinder 25 is fixedly connected to the rear end of the slide 41, and the bottom end of the slide 41 is fixedly connected to the housing of the second servo motor 42. A rotary table 43 is fixedly connected to the end of the main shaft of the second servo motor 42. The rotary table 43 is rotatably connected to the inner side of the slide 41 through bearings. With the above settings, the slide 41 slides smoothly along the second slide rail 23. The first electric hydraulic cylinder 25 provides stable driving force, which can accurately adjust the distance between the working parts and the iron core. The second servo motor 42 drives the rotary table 43 to rotate stably, which can quickly switch between the cleaning work station and the laser marking work station without secondary disassembly and positioning. The process is tightly connected, improving the overall work efficiency, while ensuring the alignment consistency after the work station is switched. As a further implementation of this solution, the rotary table 43, the upright frame 44, and the machine plate 45 are fixedly connected by bolts. The top of the machine plate 45 is fixedly connected to the housing of the third servo motor 46. A lead screw 47 is fixedly connected to the end of the spindle of the third servo motor 46. A guide post 48 is fixedly connected between the rotary table 43 and the machine plate 45. The lower end of the lead screw 47 is rotatably connected to the inner side of the rotary table 43. A lifting seat 49 is threadedly connected to the outer side of the lead screw 47. The inner side of the lifting seat 49 is slidably connected to the outer side of the guide post 48. A linear module 9 is fixedly connected to the rear end of the lifting seat 49. The rear end of the slide plate of group 9 is fixedly connected to the laser marking machine 1. With the above settings, the turntable 43, the upright frame 44 and the machine plate 45 are fastened together, which has high load-bearing strength and is not easy to shake during operation. The third servo motor 46 drives the lead screw 47 to rotate, and cooperates with the guide column 48 to vertically guide the lifting seat 49, so that the lifting seat 49 moves smoothly without deviation. The lifting seat 49 is equipped with the linear module 9 and the laser marking machine 1, which can realize the up and down and left and right bidirectional displacement adjustment of the laser marking machine 1, flexibly adapting to the different marking position requirements of the iron core side wall, and making the marking alignment more accurate. As a further implementation of this solution, the cleaning frame assembly 5 includes a main frame 51. The rear end of the main frame 51 is fixedly connected to the front end of the lifting seat 49. A fifth servo motor 52 is fixedly connected to the right side of the main frame 51. A drive shaft 53 is fixedly connected to the end of the main shaft of the fifth servo motor 52. The front end of the main frame 51 is rotatably connected to the drive shaft 53 through a bearing. A dust collection pipe 56 is rotatably connected to the front end of the main frame 51 through a bearing. With the above settings, the main frame 51 rises and falls synchronously with the lifting seat 49, so that the cleaning operation structure always corresponds to the iron core to be processed area. The fifth servo motor 52 drives the front cleaning component to rotate as a whole through the drive shaft 53. The operation range covers the circumferential area of ​​the iron core side wall. The dust collection pipe 56 adopts a rotating installation structure, which can operate synchronously with the operation structure, while keeping the dust collection air passage unobstructed and avoiding pipe torsion interference. As a further implementation of this solution, a first sealing plate 54 is fixedly connected to one side of the drive shaft 53, and an air pump 55 is fixedly connected to the right side of the first sealing plate 54. The left side of the first sealing plate 54 is sealed to the Venturi tube 66 through an annular rubber gasket. The air nozzle of the dust collection pipe 56 extends to the inside of the Venturi tube 66. The first sealing plate 54 and the rotating shell 61 are fixedly connected by bolts. Through the above arrangement, the first sealing plate 54 integrates the air pump 55, the Venturi tube 66 and the rotating shell 61 into one unit, with a compact structure. The sealing structure between the first sealing plate 54 and the Venturi tube 66 can reduce air circuit negative pressure leakage and ensure stable dust collection suction of the Venturi tube 66. The rotating shell 61 and the first sealing plate 54 can be detached and fixed, which facilitates the inspection and maintenance of internal components. As a further implementation of this solution, a filter element 58 is threadedly connected to the inner side of the dust collection pipe 56. The filter element 58 is a hollow structure, and its inner side communicates with the inner side of the dust collection pipe 56. A filter plate is fixedly connected to the inner side of the filter element 58. The side of the filter element 58 is sealed to the dust collection pipe 56 by a first rubber ring. A second sealing plate 57 is fixedly connected to one side of the dust collection pipe 56. The second sealing plate 57 is fixedly connected to the rotating shell 61 by bolts. A first through hole is opened on the inner side of the second sealing plate 57, and the first through hole of the second sealing plate 57 connects to the dust collection pipe 56. The inner side of the dust pipe 56 is connected, and the second sealing plate 57 is sealed to the valve port of the first solenoid valve 62 by a second rubber ring. With the above configuration, the filter element 58 is threadedly installed inside the dust collection pipe 56, which is convenient to disassemble and replace. It can intercept and filter the dust and debris generated by grinding. The first rubber ring and the second rubber ring respectively play the role of sealing and air isolation to prevent air leakage from affecting the dust collection effect. The second sealing plate 57 connects the rotating shell 61, the dust collection pipe 56 and the first solenoid valve 62. The air path layout is neat and the opening and closing control response is reliable. As a further implementation of this solution, a sliding hole is provided on the inner side of the rotating shell 61. A third rubber ring is fixedly connected to the inner side of the sliding hole of the rotating shell 61. An internal column 84 is slidably connected to the inner side of the sliding hole of the rotating shell 61. A horizontal plate 81 is fixedly connected to one end of the internal column 84. A silicone beater head 82 is fixedly connected to the side of the horizontal plate 81. A return spring 83 is fixedly connected to the other end of the internal column 84. The internal column 84 extends between the rotating shell 61 and the duct assembly 68. The return spring 83 is fixedly connected to the inner side of the rotating shell 61. The duct assembly 68 includes an internal cylinder 681. A second through hole is provided on the inner side of the internal cylinder 681. A second... The solenoid valve 682 and the second solenoid valve 682 are spaced apart from the inner side of the rotating shell 61. The right end of the inner cylinder 681 is located between the two venturi tubes 66. Through the above arrangement, the third rubber ring in the sliding hole of the rotating shell 61 can form a sliding seal with the inner column 84 to maintain stable air pressure in the cavity. The inner column 84, together with the return spring 83, can drive the horizontal plate 81 and the tapping structure to extend and retract, thereby achieving secondary cleaning of loose dust on the surface of the iron core. The inner cylinder 681 is equipped with the second solenoid valve 682, which can control the extension and retraction of the inner column 84 by opening and closing the air passage. At the same time, it can increase the damping of the cavity and prevent the tapping structure from accidentally falling off due to centrifugal force during operation, thus improving operational safety. As a further implementation of this solution, the bearing assembly 74 includes a connecting shaft 741. A first friction disc 742, a second friction disc 743, and a rotating shaft 744 are sleeved on the outer side of the connecting shaft 741. The connecting shaft 741 and the second friction disc 743 are fixed by bolts. The rotating shaft 744 is limited by the two second friction discs 743. The connecting shaft 741 extends to the inner side of the connecting housing 751. A dust suction channel 72 and a rubber ring 753 are fixedly connected to the inner side of the connecting housing 751. The connecting shaft 741 and the connecting housing 751 are sealed by the rubber ring 753. The side of the first friction disc 742 is in contact with one end of the second spring 752. The first friction disc 742 and the second friction disc 743 are in contact. An internal thread 754 is provided on the inner side of the connecting housing 751. The inner side of the internal thread 754 is threaded to the fixed seat 76. One side of the connecting housing 751 is sealed by a gasket 75. The connection between the connecting shaft 741 and the fixed seat 76 is sealed. The first friction disc 742 slides inside the connecting shell 751, and the outer sides of the rotating shaft 744 and the second friction disc 743 both slide inside the connecting shell 751. Through the above arrangement, the connecting shaft 741, the first friction disc 742 and the second friction disc 743 cooperate with each other to form a stable friction transmission structure, which is adapted to the self-adaptive operation requirements of the grinding belt. The second spring 752 can maintain the contact pressure between the friction discs, compensate for the wear of the components, and ensure uniform grinding effect over a long period of time. The connecting shell 751 forms a sealed protective structure through the rubber ring 753 and the sealing gasket 755 to prevent dust from entering the internal transmission position and reduce component jamming and wear. The connecting shell 751 and the fixed seat 76 are threaded together, which is convenient for disassembly and assembly. At the same time, it can limit the effective range of grinding operation and avoid damage to the insulation layer of the non-working area of ​​the iron core due to the excessive cleaning area.

[0021] Workflow: Example 1: During the loading and positioning process, the automotive stator core is first placed on the upper end of the conveying roller 32. Multiple conveying rollers 32 are driven by a first servo motor to transport the core. Driven by the conveying rollers 32, the core is transported to the upper end of multiple floating rollers 33. After the positioning rollers 29 at the front and rear ends of the core are roughly aligned, the second electric hydraulic cylinder 27 is activated to push the push plate 28 and positioning rollers 29 backward. The push plate 28 slides inside the first slide rail 22, and the positioning rollers 29 extend to the upper end of the frame base 21. The positioning rollers 29 move backward with the push plate 28. When the positioning rollers 29 contact the outer periphery of the core, the two front positioning rollers 29 push the core backward. Through the friction between the floating rollers 33, the floating rollers 33 move backward with the core. The floating rollers 33 slide on the outside of the floating roller shaft 34, and the floating rollers 33 squeeze the first spring 35 at the rear end. The floating roller 33 stretches the first spring 35 at the front end. When the rear end of the iron core contacts the two positioning rollers 29 at the rear end, the iron core is displaced by the squeezing of the positioning rollers 29 at the front and rear ends. Under the squeezing action of the two positioning rollers 29 at the front and rear ends, the iron core moves left and right. Through the friction between the iron core and the floating roller 33, the iron core drives the floating roller 33 to rotate. The floating roller 33 drives the floating roller shaft 34 to rotate. The floating roller shaft 34 rotates inside the conveyor frame 31. The floating roller 33 is in contact with the first spring 35 and does not affect the normal rotation of the floating roller 33. The above principle has the effect of correcting the position of the iron core, aligning the axis of the iron core with the position of the laser marking machine 1, providing a stable foundation for laser marking of the iron core. At the same time, when correcting the iron core, it reduces the scratches on the surface of the iron core that cause damage to the outer skin of the iron core. Example 2: During the pretreatment and cleaning of impurities on the surface of the iron core, the second servo motor 42 drives the rotary table 43 to rotate 180 degrees, causing the rotating component 6 and the grinding component 7 to face the iron core. The first electric hydraulic cylinder 25 drives the slide table 41 to approach along the second slide rail 23. The left end fixed seat 76 is fixed to the side of the second sealing plate 57, and the right end fixed seat 76 is fixed to the side of the first sealing plate 54. The flexible grinding belt 71 is made of annular polyurethane-based silicon carbide, and the particle size of the flexible grinding belt 71 is P320-P400. The flexible grinding belt 71 fits the side wall of the iron core and adapts to deformation. The first friction disc 742, the second friction disc 743, and the rotating shaft 744 are sleeved on the outside of the connecting shaft 741. The rotating shaft 744 is positioned... Between the two second friction discs 743, the connecting shaft 741 is fixed to the second friction discs 743 by bolts. The first friction disc 742 is circumferentially limited by a rectangular limiting block on the inner wall of the connecting shell 751, allowing it to slide only radially. The two ends of the connecting shaft 741 are rigidly fixed to the second friction discs 743 and the rotating shaft 744. The second friction discs 743 and 742 are in close contact across their entire plane. The first friction disc 742 can only slide radially within the connecting shell 751 by the limiting block. The second spring 752, after being compressed, provides a constant pre-contact pressure of 0.25MPa-0.35MPa. The second friction disc 743 rubs against the first friction disc 742, with a static friction coefficient of 0.40-0.50. It provides 8N-12N tangential frictional resistance, which is greater than the minimum force of 6N required to polish residual impurities and less than the critical force of 14N required for the adaptive rotation of the flexible polishing belt 71. The fifth servo motor 52 is activated, driving the drive shaft 53, the first sealing plate 54, and the air pump 55 to rotate simultaneously. The air pump 55 is powered by a battery. The first sealing plate 54, the rotating shell 61, and the second sealing plate 57 are fixedly connected by bolts. One side of the second sealing plate 57 is sealed to one side of the valve port of the first solenoid valve 62 by a second rubber ring. The fifth servo motor 52 drives the rotating assembly 6, the polishing assembly 7, and the tapping assembly 8 to rotate synchronously. Under normal conditions, the second friction disc 743 and the first friction disc 742 remain in contact. While relatively stationary, the flexible grinding belt 71 rotates to remove metal spatter, oxide layer, and insulating varnish residue. The second spring 752 can automatically compensate for 2.5mm of wear to maintain stable pressure. When local wear causes the friction to exceed the critical value, the flexible grinding belt 71 drives the rotating shaft 744 to rotate to achieve uniform circumferential grinding. In conjunction with the slide assembly 4, the grinding assembly 7 is driven to move up and down to grind the iron core surface. At the same time, the limiting ring at the end of the connecting shaft 741 and the limiting step on the inner wall of the connecting shell 751 form a limiting structure, limiting the maximum radial stroke to 4.5mm, so that the grinding contact width is controlled within 10±0.5mm, accurately cleaning the 5mm range around the marking area and avoiding damage to the insulating coating in non-working areas. Example 3: While grinding and cleaning impurities on the surface of the iron core, the air pump 55 is started simultaneously. The air pump 55 outputs an air pressure of 0.3-0.5MPa, continuously supplying compressed air into the venturi tube 66 of the main air chamber. The first solenoid valve 62 and the second solenoid valve 682 are both powered by independent batteries and communicate wirelessly with the main control system via Bluetooth module, with a response time ≤100ms. During the grinding operation, the main control system controls the first solenoid valve 62 to be fully open and the second solenoid valve 682 to be fully closed. When the second solenoid valve 682 is closed, the space formed by the outer periphery of the inner cylinder 681 and the inner side of the rotating shell 61 is a sealed cavity. This can increase the damping force when the inner column 84 moves, preventing the silicone tapping head 82 from detaching from the storage cavity 65 under the action of centrifugal force. At this time, the gas flow direction is: compressed air enters the venturi tube 66 of the main air chamber from the air pump 55, and flows into the venturi tube 66 after being stabilized. The constriction section of the Venturi tube 66 forms a high-speed airflow and a negative pressure zone at the throat inside the Venturi tube 66. The high-speed airflow enters the dust collection tube 56 of the dust collection chamber through the first solenoid valve 62, and is finally discharged through the filter element 58. The filter element 58 is made of polypropylene meltblown material with a filtration accuracy of 5μm. It is detachably connected to the air outlet of the dust collection tube 56 of the dust collection chamber by bolts, which is convenient for regular replacement and maintenance. Relying on the negative pressure generated by the Venturi effect, the external air flows through the suction hole 73, the suction pipe suction channel 72, the inside of the connecting shell 751, and the inside of the fixing seat 76 in sequence into the main air chamber Venturi tube 66, forming a complete circulating airflow. Metal dust, oxide scale debris and insulating varnish powder generated during the grinding process are sucked into the suction hole 73 with the circulating airflow, transported to the Venturi tube 66 through the suction channel 72, and then enter the dust collection tube 56 of the dust collection chamber with the compressed air. Finally, they are intercepted and collected by the filter element 58 to prevent grinding dust from spreading and polluting the working environment. Example 4: During the secondary cleaning of loose dust on the iron core surface, after grinding, the first solenoid valve 62 is closed and the second solenoid valve 682 is opened. The air pump 55 maintains an air supply of 0.3-0.5MPa. The dust-resistant one-way valve 67 with a pressure of 0.01MPa is opened and installed between the venturi tube 66 of the main air chamber and the inner cavity of the rotating shell 61. It is forward-biased and reverse-biased. Compressed air enters the sealed cavity formed by the outer periphery of the inner cylinder 681 and the inner side of the rotating shell 61. When the pressure reaches 0.2MPa, it pushes the piston inner column 84 to overcome the return spring 83 and move into the receiving cavity 65 with a preload of 5N. The piston inner column 84 and the inner wall of the rotating shell 61 are sealed by a rubber ring. The front end of the piston inner column 84 is fixed with the connecting rod cross plate 81 and the silicone tapping head 82. After fully extending, the tapping head protrudes 5mm from the end face of the receiving cavity 65, which is greater than the 3mm protrusion of the flexible grinding belt 71, ensuring that the flexible grinding belt 71 does not contact the iron core during tapping. Once in position, the second solenoid valve 682 closes and the first solenoid valve 62 opens, keeping the tapping head extended. The first electric hydraulic cylinder 25 of the linear drive component moves the mounting base slide 41 forward, making the tapping head form a 0.5mm pre-pressure contact with the iron core. The fifth servo motor 52 of the main drive motor drives the rotating component 6, the grinding component 7, and the tapping component 8 to rotate. Only the tapping head on the tapping component 8 contacts the iron core, tapping away the residual loose dust with a force of 2N-3N. During the tapping process, the air pump 55 works continuously, and the detached dust is collected by negative pressure. After 10 seconds, the second solenoid valve 682 opens to release pressure, and the reset spring 83 drives the tapping head to automatically retract into the receiving cavity 65, completing the secondary cleaning. Example 5: When performing laser marking on the sidewall of the iron core, the second servo motor 42 of the rotary drive component drives the laser marking machine 1 to rotate and reset, so that the laser emitting end of the laser marking machine 1 is precisely aligned with the center of the area to be marked on the iron core. The first electric hydraulic cylinder 25 of the linear drive component controls the laser marking machine 1 to move back and forth along the axial direction, adjusting the distance between the laser marking machine 1 and the sidewall of the iron core to within the effective marking focal length range. The horizontal linear module 9 drives the laser marking machine 1 to achieve precise displacement in the left and right directions. When controlling the vertical displacement of the laser marking machine 1, the third servo motor 46 drives the lead screw 47 to rotate. The lead screw 47 drives the lifting seat 49 to slide linearly along the vertical guide rail 48. The lifting seat 49 simultaneously drives the laser marking machine 1 and the horizontal linear module 9 to move up and down as a whole. Through the cooperation of the left and right displacement of the horizontal linear module 9 and the vertical displacement of the lead screw 47, the laser marking machine 1 can perform two-dimensional planar marking work in the plane of the sidewall of the iron core.

[0022] 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 marking device for iron cores, comprising a laser marking machine (1), a frame assembly (2), and a feeding assembly (3), characterized in that: The inner side of the frame assembly (2) is equipped with a slide assembly (4). The front end of the slide assembly (4) is equipped with a cleaning frame assembly (5), a rotating assembly (6), a grinding assembly (7) and a tapping assembly (8). The tapping assembly (8) is used to perform secondary cleaning of the loose dust remaining on the surface of the iron core. The tapping assembly (8) rotates synchronously with the rotating assembly (6) and achieves telescopic tapping action through air circuit control. The rotating assembly (6) includes a rotating shell (61), with a storage cavity (65) opened on the inner side of the rotating shell (61). An air chamber fixing plate (63) and a mounting plate (64) are fixedly connected to the inner side of the rotating shell (61). A first solenoid valve (62) is fixedly connected to the left side of the mounting plate (64). A one-way valve (67) is fixedly connected to the inner side of the air chamber fixing plate (63). A duct assembly (68) is fixedly connected to the inner side of the rotating shell (61). The polishing assembly (7) includes a flexible polishing belt (71), with a dust suction channel (72) and a dust suction hole (73) on the inner side of the flexible polishing belt (71). Both sides of the flexible polishing belt (71) are fixedly connected to a bearing assembly (74). A receiving assembly (75) is installed on the outer side of the bearing assembly (74). A fixing seat (76) is threadedly connected to the inner side of the receiving assembly (75). The fixing seat (76) and the air chamber fixing plate (63) are both fixedly connected to the venturi tube (66).

2. The laser marking equipment for iron cores according to claim 1, characterized in that: The frame assembly (2) includes a frame base (21), with a first slide rail (22) and a second slide rail (23) on the inner side of the frame base (21). A rear end plate (24) is fixedly connected to the rear end of the frame base (21). The front end of the rear end plate (24) is fixedly connected to the cylinder body of a first electric hydraulic cylinder (25). The first electric hydraulic cylinder (25) is embedded in the inner side of the second slide rail (23). A front end plate (26) is fixedly connected to the front end of the frame base (21). The rear end of the front end plate (26) is fixedly connected to the cylinder body of a second electric hydraulic cylinder (27). A push plate (28) is fixedly connected to the rear end of the piston rod of the second electric hydraulic cylinder (27). The push plate (28) is slidably connected to the inner side of the first slide rail (22). A positioning roller (29) is rotatably connected to the rear end of the push plate (28).

3. The laser marking equipment for iron cores according to claim 2, characterized in that: The feeding assembly (3) includes a conveyor frame (31), the bottom end of which is fixedly connected to the top end of the frame base (21). The front end of the rear end plate (24) is equipped with a push plate (28) and a positioning roller (29). The conveyor frame (31) is located between two push plates (28). A conveying roller (32) is rotatably connected to the inner side of the conveyor frame (31). The conveying roller (32) is driven by a first servo motor. A floating roller shaft (34) is rotatably connected to the inner side of the conveyor frame (31). A floating cylinder roller (33) is slidably connected to the outer side of the floating roller shaft (34). A first spring (35) is attached to both the front end and the rear end of the floating cylinder roller (33). The first spring (35) is fixedly connected to the side of the conveyor frame (31).

4. The laser marking equipment for iron cores according to claim 2, characterized in that: The slide assembly (4) includes a slide (41), which is slidably connected to the inner side of the second slide (23). The piston rod end of the first electric hydraulic cylinder (25) is fixedly connected to the rear end of the slide (41). The bottom end of the slide (41) is fixedly connected to the housing of the second servo motor (42). A rotary table (43) is fixedly connected to the end of the main shaft of the second servo motor (42). The rotary table (43) is rotatably connected to the inner side of the slide (41) through a bearing.

5. The laser marking equipment for iron cores according to claim 4, characterized in that: The rotary table (43), the upright frame (44) and the machine plate (45) are fixedly connected by bolts. The top of the machine plate (45) is fixedly connected to the housing of the third servo motor (46). The end of the main shaft of the third servo motor (46) is fixedly connected to a lead screw (47). A guide post (48) is fixedly connected between the rotary table (43) and the machine plate (45). The lower end of the lead screw (47) is rotatably connected to the inner side of the rotary table (43). The outer side of the lead screw (47) is threadedly connected to a lifting seat (49). The inner side of the lifting seat (49) is slidably connected to the outer side of the guide post (48). The rear end of the lifting seat (49) is fixedly connected to a linear module (9). The rear end of the slide plate of the linear module (9) is fixedly connected to a laser marking machine (1).

6. The laser marking equipment for iron cores according to claim 5, characterized in that: The cleaning frame assembly (5) includes a main frame (51), the rear end of which is fixedly connected to the front end of the lifting seat (49). A fifth servo motor (52) is fixedly connected to the right side of the main frame (51), and a drive shaft (53) is fixedly connected to the end of the main shaft of the fifth servo motor (52). The front end of the main frame (51) is rotatably connected to the drive shaft (53) through a bearing, and a dust collection pipe (56) is rotatably connected to the front end of the main frame (51) through a bearing.

7. The laser marking equipment for iron cores according to claim 6, characterized in that: A first sealing plate (54) is fixedly connected to one side of the drive shaft (53), and an air pump (55) is fixedly connected to the right side of the first sealing plate (54). The left side of the first sealing plate (54) is sealed to the Venturi tube (66) through an annular rubber pad. The air nozzle of the dust collection pipe (56) extends to the inside of the Venturi tube (66). The first sealing plate (54) and the rotating shell (61) are fixedly connected by bolts.

8. The laser marking equipment for iron cores according to claim 6, characterized in that: The dust collection pipe (56) is threaded with a filter element (58) on its inner side. The filter element (58) is a hollow structure. The inner side of the filter element (58) is connected to the inner side of the dust collection pipe (56). A filter plate is fixedly connected to the inner side of the filter element (58). The side of the filter element (58) is sealed to the dust collection pipe (56) through a first rubber ring. A second sealing plate (57) is fixedly connected to one side of the dust collection pipe (56). The second sealing plate (57) is fixedly connected to the rotating shell (61) by bolts. A first through hole is opened on the inner side of the second sealing plate (57). The first through hole of the second sealing plate (57) is connected to the inner side of the dust collection pipe (56).

9. The laser marking equipment for iron cores according to claim 1, characterized in that: The rotating housing (61) has a sliding hole on its inner side. A third rubber ring is fixedly connected to the inner side of the sliding hole of the rotating housing (61). An internal column (84) is slidably connected to the inner side of the sliding hole of the rotating housing (61). A horizontal plate (81) is fixedly connected to one end of the internal column (84). A silicone tapping head (82) is fixedly connected to the side of the horizontal plate (81). A return spring (83) is fixedly connected to the other end of the internal column (84). The internal column (84) extends to the rotating housing (61) and the air duct assembly. Between (68), the reset spring (83) is fixedly connected to the inside of the rotating shell (61). The air duct assembly (68) includes an inner tube (681). A second through hole is opened on the inner side of the inner tube (681). A second solenoid valve (682) is fixedly connected to the inner tube (681) near the second through hole. A gap is provided between the second solenoid valve (682) and the inner side of the rotating shell (61). The right end of the inner tube (681) is located between two venturi tubes (66).

10. The laser marking equipment for iron cores according to claim 1, characterized in that: The bearing assembly (74) includes a connecting shaft (741). A first friction disc (742), a second friction disc (743), and a rotating shaft (744) are sleeved on the outside of the connecting shaft (741). The connecting shaft (741) and the second friction disc (743) are fixed by bolts. The connecting shaft (741) extends to the inside of a connecting housing (751). A dust suction channel (72) and a rubber ring (753) are fixedly connected to the inside of the connecting housing (751). The connecting shaft (741) and the connecting housing (751) are sealed by the rubber ring (753). The first friction disc (742) is... 2) The side is attached to one end of the second spring (752), the first friction disc (742) and the second friction disc (743) are attached to each other, the inner side of the connecting shell (751) is provided with an internal thread (754), the inner side of the internal thread (754) is threaded to the fixed seat (76), one side of the connecting shell (751) is sealed between the fixed seat (76) and the sealing gasket (755), the first friction disc (742) slides on the inner side of the connecting shell (751), the outer side of the rotating shaft (744) and the outer side of the second friction disc (743) both slide on the inner side of the connecting shell (751).

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