Demagnetizer for bearing ring

Abstract

The utility model provides a demagnetizer for a bearing ring. The demagnetizer comprises a rack, the transmission roller conveying mechanism is arranged in the length direction of the rack; the demagnetizing mechanism is installed in the middle of the rack and arranged in the width direction of the rack and comprises a supporting frame installed on the rack, an upper magnet yoke assembly capable of ascending and descending along the supporting frame and a lower magnet yoke assembly installed on the rack and arranged right opposite to the upper magnet yoke assembly; the upper magnet yoke assembly comprises a first U-shaped magnet yoke and first coils, an opening of the first U-shaped magnet yoke faces downwards, and the first U-shaped magnet yoke is wound with two sets of parallel first coils. The lower magnet yoke assembly comprises a second U-shaped magnet yoke and second coils, an opening of the second U-shaped magnet yoke faces upwards, and two sets of parallel second coils are wound on the second U-shaped magnet yoke; the first coil and the second coil are connected in parallel. By adjusting the height of the upper magnet yoke assembly and the magnetic field intensity generated by the coil, effective demagnetization of the bearing ring is realized.

Description

Technical Field

[0001] This utility model belongs to the field of demagnetization technology, specifically relating to a demagnetizer for bearing rings. Background Technology

[0002] After grinding, the bearing rings become magnetized due to the use of magnetic chucks and other devices. It is necessary to reduce the residual magnetism on the bearing rings during the production process to within the specified range of residual magnetism technical requirements. This requires the use of an external demagnetizer to demagnetize them.

[0003] However, existing demagnetizers for large bearing rings have the following drawbacks during use: 1. Incomplete demagnetization of large bearing rings, resulting in significant residual magnetism, which makes rinsing difficult and severely affects the performance of subsequent equipment use; 2. The yoke cannot be quickly adjusted to adjust the bearing ring's height, leading to low flaw detection efficiency and compromised flaw detection results; 3. Existing demagnetizers cannot adjust the demagnetizing current according to the corresponding bearing ring specifications, resulting in wasted resources. Those skilled in the art urgently need to solve these technical problems. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this utility model provides a demagnetizer for bearing rings. By adjusting the height of the upper magnetic yoke assembly and the magnetic field strength generated by the coil, it achieves effective demagnetization of the bearing rings with good demagnetization effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A demagnetizing machine for bearing rings includes a frame;

[0007] A conveying roller mechanism is arranged along the length of the frame and includes a conveying roller rotatably mounted on the frame, and a roller conveying motor axially connected to the conveying roller is provided on the frame.

[0008] The demagnetizing mechanism is installed in the middle of the frame and arranged along its width, including a support frame installed on the frame, an upper magnetic yoke assembly that can be raised and lowered along the support frame, and a lower magnetic yoke assembly installed on the frame and arranged opposite to the upper magnetic yoke assembly.

[0009] The upper yoke assembly includes a first U-shaped yoke and a first coil. The opening of the first U-shaped yoke faces downward, and two sets of parallel first coils are wound on the first U-shaped yoke.

[0010] The lower yoke assembly includes a second U-shaped yoke and a second coil. The opening of the second U-shaped yoke faces upward and is directly opposite the first U-shaped yoke. Two sets of parallel second coils are wound on the second U-shaped yoke.

[0011] The first coil and the second coil are connected in parallel.

[0012] In a preferred embodiment of this utility model, the upper magnetic yoke assembly is mounted on the lifting assembly. The lifting assembly includes screw jacks symmetrically mounted at both ends of the support frame. The two screw jacks are connected to the upper magnetic yoke assembly. A universal joint is connected between the two screw jacks, and a worm gear reducer is driven by a servo motor and connected to it.

[0013] In a preferred embodiment of the present invention, the second U-shaped magnetic yoke is installed between the transmission rollers, and its upper end face is lower than the working surface of the transmission roller.

[0014] In a preferred embodiment of this utility model, the transmission rollers are configured as hollow structures and are all made of stainless steel.

[0015] In a preferred embodiment of the present invention, a coating layer is formed on the outer circumferential surface of the transmission roller, and the coating layer is made of polyurethane with a thickness of 6 mm.

[0016] In a preferred embodiment of the present invention, the transmission roller is rotatably mounted on the frame, and a sprocket is connected to one end of the transmission roller. The sprocket is connected to the roller conveyor motor via a chain.

[0017] In a preferred embodiment of the present invention, an electrical control box is also included, which is mounted on the support frame and electrically connected to the roller conveyor motor, the first coil, the second coil and the servo motor respectively.

[0018] Beneficial effects: The present invention provides a demagnetizer for bearing rings, wherein the upper magnetic yoke assembly is controlled by a servo motor and automatically adjusts to a specified range according to the height of the bearing rings to achieve the best demagnetization effect;

[0019] The two sets of demagnetizing coils of the upper yoke are connected in parallel, the two sets of demagnetizing coils of the lower yoke are connected in parallel, and the demagnetizing coils of the upper and lower yokes are connected in parallel, so that the demagnetizing current can be continuously adjusted and the strength of the magnetic field can be controlled, thereby adapting to the demagnetizing requirements of bearing rings of different materials and sizes.

[0020] This utility model flaw detector adopts an electromechanical integrated structure, which is compact, has good overall rigidity, and runs smoothly. By adjusting the height of the upper magnetic yoke assembly and the magnetic field strength generated by the coil, it can effectively demagnetize the bearing rings, and the demagnetization effect is good. Attached Figure Description

[0021] Figure 1 This utility model provides a structural schematic diagram of a demagnetizer for bearing rings;

[0022] Figure 2 A partial structural schematic diagram of a demagnetizer for bearing rings provided by this utility model;

[0023] Figure 3 This is a schematic diagram of the demagnetizing mechanism described in this utility model;

[0024] Figure 4 This is a schematic diagram of the operation of the upper and lower magnetic yoke components described in this utility model;

[0025] Figure 5 This is a schematic diagram of the lifting assembly described in this utility model.

[0026] In the diagram: 1 rack;

[0027] 2. Conveying mechanism with conveyor rollers; 21. Conveying rollers; 22. Roller conveyor motor.

[0028] 3 Demagnetizing mechanism, 31 Support frame, 32 Upper yoke assembly, 321 First U-shaped yoke, 322 First coil, 33 Lower yoke assembly, 331 Second U-shaped yoke, 332 Second coil, 34 Lifting assembly, 341 Screw jack, 342 Universal joint, 343 Servo motor, 344 Worm gear reducer.

[0029] 4. Electrical control box. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figure 1-4 As shown, this utility model provides a demagnetizing machine for bearing rings, including a frame 1;

[0032] The conveying roller mechanism 2 is arranged along the length of the frame 1 and includes a conveying roller 21 rotatably mounted on the frame 1, and a roller conveying motor 22 axially connected to the conveying roller 21 is provided on the frame 1.

[0033] The demagnetizing mechanism 3 is installed in the middle of the frame 1 and arranged along its width direction. It includes a support frame 31 installed on the frame 1, an upper magnetic yoke assembly 32 that can be raised and lowered along the support frame 31, and a lower magnetic yoke assembly 33 installed on the frame 1 and arranged opposite to the upper magnetic yoke assembly 32.

[0034] The upper magnetic yoke assembly 32 includes a first U-shaped magnetic yoke 321 and a first coil 322. The opening of the first U-shaped magnetic yoke 321 faces downward, and two sets of parallel first coils 322 are wound on the first U-shaped magnetic yoke 321.

[0035] The lower yoke assembly 33 includes a second U-shaped yoke 331 and a second coil 332. The second U-shaped yoke 331 has its opening facing upward and is directly opposite the first U-shaped yoke 321. Two sets of parallel second coils 332 are wound on the second U-shaped yoke 331.

[0036] The first coil 322 and the second coil 332 are connected in parallel;

[0037] The working principle and beneficial effects of the above embodiments are as follows:

[0038] This utility model demagnetizer is designed for demagnetizing large bearing rings. It is applicable to bearing rings with an outer diameter of 500mm to 1600mm and a height of less than 500mm after grinding.

[0039] The demagnetizing machine of this utility model has the same side for loading and unloading. The operator hoists the bearing rings onto the transmission roller 21, and the roller conveyor motor 22 drives the transmission roller 21 to rotate and transport the bearing rings to the position of the demagnetizing mechanism 3.

[0040] The operator adjusts the upper magnetic yoke assembly 32 to descend along the support frame 31 to the set height according to the bearing ring height in order to achieve the best demagnetization effect;

[0041] When the coils of the upper yoke assembly 32 and the lower yoke assembly 33 are energized, the four energized coils, including the first coil 322 and the second coil 332, generate a strong magnetic field. This magnetic field is attracted and concentrated through the first U-shaped yoke 321 and the second U-shaped yoke 331, passing through the bearing ring. This magnetic field can magnetize the bearing ring within its effective range. The intensity of the magnetization varies with the distance between the bearing ring and the first U-shaped yoke 321 and the second U-shaped yoke 331. It decreases as the distance from the first U-shaped yoke 321 and the second U-shaped yoke 331 increases, decaying approximately exponentially. When the distance from the first U-shaped yoke 321 and the second U-shaped yoke 331 is sufficiently far, the magnetic field intensity decays to near zero, thus achieving the purpose of demagnetizing the bearing ring.

[0042] This utility model discloses a demagnetizer for bearing rings, which adopts an electromechanical integrated structure, has a compact structure, good overall rigidity, and stable mechanical operation. By adjusting the height of the upper magnetic yoke assembly and the magnetic field strength generated by the coil, the bearing rings can be effectively demagnetized with good demagnetization effect.

[0043] In one embodiment, such as Figure 5 As shown,

[0044] The upper magnetic yoke assembly 32 is mounted on the lifting assembly 34. The lifting assembly 34 includes screw jacks 341 symmetrically mounted at both ends of the support frame 31. The two screw jacks 341 are connected to the upper magnetic yoke assembly 32. A universal joint 342 is connected between the two screw jacks 341, and a worm gear reducer 344 is driven by a servo motor 343 and connected to it.

[0045] The servo motor 343 reduces speed and increases torque through the worm gear reducer 344, and transmits power to two screw jacks 341 through the universal joint 342. After receiving power, the screw inside the screw jack 341 starts to rotate, realizing the lifting and lowering of the upper magnetic yoke assembly 32. The two screw jacks 341 work synchronously through the universal joint 342 to ensure that the upper magnetic yoke assembly 32 remains horizontal and stable during the lifting and lowering process.

[0046] In one embodiment,

[0047] The aforementioned second U-shaped magnetic yoke 331 is installed between the transmission rollers 21, and its upper end face is lower than the working surface of the transmission roller 21;

[0048] The second U-shaped magnetic yoke 331 is installed between the transmission rollers 21, so that the magnetic yoke can directly demagnetize the passing bearing rings. The upper end face of the second U-shaped magnetic yoke 331 is designed to be lower than the working surface of the transmission roller 21 to avoid interference with the bearing rings when they pass through.

[0049] In one embodiment,

[0050] The aforementioned transfer rollers 21 are configured as hollow structures and are all made of stainless steel;

[0051] The hollow structure of the transfer roller 21 reduces its own weight, thereby reducing the load on the roller conveyor motor 22 and reducing energy consumption. The stainless steel material still maintains sufficient strength and durability, ensuring the stable operation of the transfer roller 21 under high load.

[0052] In one embodiment,

[0053] The outer circumferential surface of the aforementioned transmission roller 21 is covered with a coating layer, and the coating layer is made of polyurethane with a thickness of 6mm. It has good wear resistance and shock absorption capacity, extending the service life of the transmission roller 21. It also has the advantages of not remagnetizing and not causing damage to the bearing rings.

[0054] In one embodiment,

[0055] The aforementioned transmission roller 21 is rotatably mounted on the frame 1, and a sprocket is connected to one end of the transmission roller 21. The sprocket is connected to the roller conveyor motor 22 via a chain.

[0056] A sprocket is installed at one end of the transmission roller 21. The sprockets are connected to the roller conveyor motor 22 via a chain. When the roller conveyor motor 22 starts and runs, it transmits power to the sprockets via the chain. The sprockets then transmit power to the transmission roller 21, causing it to rotate. The structure is compact and the transmission is smooth.

[0057] In one embodiment,

[0058] It also includes an electrical control box 4, which is mounted on a support frame 31 and is electrically connected to the roller conveyor motor 22, the first coil 322, the second coil 332 and the servo motor 343 respectively.

[0059] In summary:

[0060] This utility model discloses a demagnetizer for bearing rings. The demagnetization process involves placing the bearing rings in an alternating magnetic field and using the decreasing hysteresis loop for demagnetization. As the amplitude of the alternating magnetic field gradually decreases, the trajectory of the hysteresis loop also becomes smaller and smaller. When it decreases to zero, the magnetic field inside the bearing rings also decreases to zero.

[0061] The upper magnetic yoke assembly is controlled by a servo motor and automatically adjusts to a specified range according to the height of the bearing rings to achieve the best demagnetization effect.

[0062] The two sets of demagnetizing coils of the upper yoke are connected in parallel, the two sets of demagnetizing coils of the lower yoke are connected in parallel, and the demagnetizing coils of the upper and lower yokes are connected in parallel, so that the demagnetizing current can be continuously adjusted and the strength of the magnetic field can be controlled, thereby adapting to the demagnetizing requirements of bearing rings of different materials and sizes.

[0063] This utility model flaw detector adopts an electromechanical integrated structure, which is compact, has good overall rigidity, and runs smoothly. By adjusting the height of the upper magnetic yoke assembly and the magnetic field strength generated by the coil, it can effectively demagnetize the bearing rings, and the demagnetization effect is good.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The terms "front," "back," "left," and "right" used in the text are not specific and are mainly for more intuitive illustration of the technical solution, and do not constitute a limitation. Those skilled in the art should understand that the above embodiments are only for illustrating the technical concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the scope of protection of this utility model. All equivalent changes or modifications made according to the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A demagnetizer for bearing rings, characterized in that: Includes rack (1); The conveying roller mechanism (2) is arranged along the length of the frame (1) and includes a conveying roller (21) rotatably mounted on the frame (1). A roller conveying motor (22) axially connected to the conveying roller (21) is provided on the frame (1). The demagnetizing mechanism (3) is installed in the middle of the frame (1) and arranged along its width direction, including a support frame (31) installed on the frame (1), an upper magnetic yoke assembly (32) that can be raised and lowered along the support frame (31), and a lower magnetic yoke assembly (33) installed on the frame (1) and arranged opposite to the upper magnetic yoke assembly (32). The upper yoke assembly (32) includes a first U-shaped yoke (321) and a first coil (322). The first U-shaped yoke (321) has an opening facing downwards, and two sets of parallel first coils (322) are wound on the first U-shaped yoke (321). The lower yoke assembly (33) includes a second U-shaped yoke (331) and a second coil (332). The second U-shaped yoke (331) has its opening facing upward and is directly opposite the first U-shaped yoke (321). Two sets of parallel second coils (332) are wound on the second U-shaped yoke (331). The first coil (322) and the second coil (332) are connected in parallel.

2. The demagnetizer for bearing rings according to claim 1, characterized in that: The upper magnetic yoke assembly (32) is mounted on the lifting assembly (34). The lifting assembly (34) includes screw jacks (341) symmetrically mounted at both ends of the support frame (31). The two screw jacks (341) are connected to the upper magnetic yoke assembly (32). A universal joint (342) is connected between the two screw jacks (341), and a worm gear reducer (344) is driven by a servo motor (343) and connected to it.

3. A demagnetizer for bearing rings according to claim 1, characterized in that: The second U-shaped magnetic yoke (331) is installed between the transmission rollers (21), and its upper end face is lower than the working surface of the transmission roller (21).

4. A demagnetizer for bearing rings according to claim 1, characterized in that: The transmission rollers (21) are hollow and made of stainless steel.

5. A demagnetizer for bearing rings according to claim 1, characterized in that: The outer circumferential surface of the transfer roller (21) is covered with a coating layer, and the coating layer is made of polyurethane with a thickness of 6 mm.

6. A demagnetizer for bearing rings according to claim 1, characterized in that: The transmission roller (21) is rotatably mounted on the frame (1), and a sprocket is connected to one end of the transmission roller (21). The sprocket is connected to the roller conveyor motor (22) via a chain.

7. A demagnetizer for bearing rings according to claim 1, characterized in that: It also includes an electrical control box (4), which is mounted on the support frame (31) and is electrically connected to the roller conveyor motor (22), the first coil (322), the second coil (332) and the servo motor (343), respectively.

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