A device for polishing the inner diameter of a porcelain insulator

Abstract

The application discloses a kind of for porcelain insulator inner diameter polishing device, including processing machine table and polishing assembly;Processing machine table is horizontal, and the porcelain insulator to be processed is supported and placed, and is centered;Support frame both sides are equipped with rotating seat, porcelain insulator is assembled and rotated by assembly part;Support frame bottom is equipped with multiple V-shaped structure support frame, and top has support wheel and supports porcelain insulator;Processing machine table side is equipped with polishing guide frame, and guide telescopic structure;Polishing assembly includes motor-driven first polishing part and second polishing part;First polishing part has silicon carbide polishing head and chrome corundum ceramic polishing ring, and is obliquely attached to the inner diameter surface of porcelain insulator, and is polished continuously in three sections;Second polishing part has flannelette as polishing surface, and the inner diameter surface is polished.This device realizes the efficient, stable polishing of the inner diameter of porcelain insulator, improves polishing precision and efficiency, and reduces the labor intensity of operator.

Description

Technical Field

[0001] This invention relates to the field of insulator processing equipment, specifically to an inner diameter grinding device for porcelain insulators. Background Technology

[0002] Insulators are devices installed between conductors at different potentials or between a conductor and a grounding component to withstand voltage and mechanical stress. They play a crucial role in overhead transmission lines, ensuring the safety and stability of power transmission. Insulators need sufficient insulation strength, mechanical strength, heat resistance, and moisture resistance to ensure reliable operation under various conditions.

[0003] Porcelain insulators, as the most widely used and technologically mature insulator components, utilize high-silica, high-alkali, and high-alumina clay as the main raw material. They are formed through processes such as slurry casting, extrusion, and static pressing, followed by sintering. Porcelain insulators typically require finishing and polishing during the green forming stage to ensure the structural quality of the green insulator. In recent years, with the increasing market demands for the quality of porcelain insulators, some manufacturers have been performing an inner diameter trimming and polishing operation on the porcelain insulator blanks after sintering. This is to further improve the surface smoothness of the insulators, remove any small particles, surface impurities, and uneven parts, thereby ensuring the smoothness and consistency of the inner surface of the porcelain insulators. This ensures that the final porcelain insulators have high mechanical strength, excellent electrical performance, low shrinkage, flame retardancy, arc resistance, and high resistance to tracking. It also further improves the physical and chemical properties of the sintered porcelain insulator blanks, ensuring that after coating with insulating coatings, rubber coatings, and painting, the insulators have better waterproof, anti-fouling, and corrosion-resistant properties to meet the performance requirements in practical applications.

[0004] Generally speaking, compared to the softer and more easily machinable raw porcelain insulators, sintered porcelain insulators, due to a series of high-temperature reaction processes, are closer in material to finished industrial ceramics, possessing higher hardness and wear resistance. Therefore, grinding the inner diameter of porcelain insulators requires specific materials and strict procedures to avoid damage or breakage. This process necessitates multiple tool changes and alignment operations, leading to low efficiency. Furthermore, some porcelain insulators have large length-to-diameter ratios, making automated robotic arms unsuitable. Therefore, manual or semi-automatic devices are often used in practice. After tool changes, the clamping force of the grinding head needs adjustment and matching based on the material and wear level of the grinding head to avoid damage or excessive wear. This process demands high levels of professional skill and experience from operators and is characterized by instability, low precision, and high labor intensity. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide an inner diameter grinding device for porcelain insulators, so as to overcome the shortcomings in the above-mentioned background art.

[0006] The technical problem solved by this invention is achieved by the following technical solution: An inner diameter grinding device for porcelain insulators includes a processing machine and a grinding assembly; The processing machine is a horizontal machine used to support and place the porcelain insulators to be processed, and to center them during processing. The processing machine includes a support frame, on both sides of which are matched rotating seats. The porcelain insulators to be processed are assembled onto the rotating seats via an assembly part and can be rotated by the rotating seats. Multiple supports are provided at the bottom of the support frame along the length of the porcelain insulators to be processed. The supports are V-shaped or Y-shaped structures. Support wheels are formed at the top of the two side arms of the V-shaped or Y-shaped structures. The support wheels are driven wheels. The multiple supports support the bottom surface of the porcelain insulators to be processed between the umbrella sections. A grinding guide is provided on one side of the processing machine. The grinding guide is a guide telescopic structure arranged along the length of the porcelain insulator to be processed. The grinding assembly is formed on the outer end of the grinding guide and includes a first grinding part and a second grinding part driven by a motor. The first grinding section is formed at the end of the grinding assembly and includes a grinding head, which is a spherical, bullet-shaped, or bulb-shaped silicon carbide grinding head. An annular groove is formed on the grinding head, and a grinding ring is formed at the position of the annular groove. The grinding ring is a chromium corundum ceramic grinding ring. When in working condition, the grinding head is obliquely attached to the inner diameter surface of the porcelain insulator to be processed, so that the first grinding section can perform three-stage continuous grinding of the inner diameter surface of the porcelain insulator to be processed in the first grinding section during the processing, passing through the front grinding head, the grinding ring, and the rear grinding head in sequence. The second polishing part is formed on the base of the polishing assembly, including a ring and a felt cloth on the outer ring surface of the ring. The second polishing part uses the felt cloth as the polishing surface to perform a felt polishing operation on the inner diameter surface of the porcelain insulator to be processed that has been treated by the first polishing part.

[0007] As a further definition, of the rotating seats provided on both sides of the support frame, one is an active rotating seat and the other is a driven rotating seat. The active rotating seat is assembled and connected to the drive motor on the outside and is driven by the drive motor to rotate. The active rotating seat and the driven rotating seat are respectively equipped with a first end face pressure plate and a second end face pressure plate in a detachable assembly manner. The first end face pressure plate and the second end face pressure plate have corresponding contact end faces of the porcelain insulator to be processed. The first end face pressure plate and the second end face pressure plate are fixed on the two end faces of the porcelain insulator to be processed as holding pressure plates. The grinding guide is located on one side of the driven rotary seat, and the second end face pressure plate on the corresponding side of the driven rotary seat has a pre-reserved processing hole for the inner hole of the porcelain insulator to be processed.

[0008] As a further limitation, the support frame is provided with a guide rail, which is arranged along the length direction of the porcelain insulator to be processed, and the support frame is arranged on the guide rail by a guide seat with a position locking mechanism, and can move and be locked in position along the guide rail by the guide seat.

[0009] As a further limitation, the two side arms of the support frame are electrically controlled telescopic structures, and the support wheels can be adjusted in position through the electrically controlled telescopic structures.

[0010] As a further limitation, in the working state, the first grinding part and the second grinding part of the grinding assembly are located on a straight line parallel to the axis of the porcelain insulator to be processed, and the straight line is located between the two supporting rollers of any support frame.

[0011] As a further limitation, the ring of the second grinding part is detachably assembled on the base of the grinding assembly.

[0012] As a further limitation, the grinding assembly has an electrically controlled hinge support formed at its end, and the first grinding part is formed on the electrically controlled hinge support.

[0013] As a further limitation, in the three-stage continuous grinding process of the porcelain insulator to be processed on the first grinding section, the grinding depth ratio of the front grinding head is 45~70%, the grinding depth ratio of the grinding ring is 20~30%, and the rear grinding head is used to grind the remaining material.

[0014] As a further limitation, the upper and lower outer edges of the chromium corundum ceramic grinding ring formed in the corresponding annular groove of the grinding head are both formed with an annular groove as a chip removal groove.

[0015] As a further limitation, the first grinding part has an opening at the top of the grinding head, and the grinding head is detachably assembled and connected at the opening position by a threaded structural member.

[0016] Beneficial Effects: The grinding device for the inner diameter of porcelain insulators of this invention solves the problems of low efficiency, unstable operation, low precision, and high labor intensity in traditional grinding processes. By adopting a horizontal machine base and support frame structure, it can easily support and place the porcelain insulator to be processed, achieving centering during processing and providing stable support while the insulator rotates. The grinding assembly design, through the inclusion of a first grinding section and a second grinding section, realizes three-stage continuous grinding and surface polishing of the inner diameter of the porcelain insulator. The first grinding section uses a combination of a silicon carbide grinding head and a chromium corundum ceramic grinding ring, achieving efficient grinding of the inner diameter surface of the porcelain insulator while ensuring grinding quality and precision. The second grinding section uses a felt cloth as the grinding surface, further polishing the inner diameter surface treated by the first grinding section, improving surface smoothness, achieving efficient and stable grinding of the inner diameter of the porcelain insulator, and improving grinding precision. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0018] Figure 2 for Figure 1 A detailed enlarged diagram of part A in the middle.

[0019] Figure 3 for Figure 2 A detailed enlarged diagram of part B.

[0020] The components are as follows: 1. Main unit housing; 2. Power unit housing; 3. Active rotating seat; 4. First end face pressure plate; 5. Porcelain insulator to be processed; 6. Umbrella joint; 7. Second motor drive seat; 8. Grinding guide frame; 9. Driven rotating seat; 10. Bearing seat; 11. Second end face pressure plate; 12. Electrically controlled guide telescopic support; 13. Lifting and adjusting support; 14. Limit block; 15. Support frame; 16. First guide slide rail; 17. Support frame; 18. Support arm; 19. Support wheel; 20. Second guide slide rail; 21. Guide seat; 22. Translation bracket; 23. Guide slide; 24. Electrically controlled hinge support; 25. First motor drive seat; 26. Grinding head; 27. Ring sleeve; 28. Felt cloth; 29. ​​Grinding ring; 30. Chip removal groove. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0022] It should be noted that the embodiments in the specification, claims, and accompanying drawings of this invention can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed.

[0023] Furthermore, the embodiments shown in this detailed description are merely one example of the possible embodiments of the present invention and represent all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0024] See Figures 1-3 A preferred embodiment of an inner diameter grinding device for porcelain insulators is provided. The inner diameter grinding device for porcelain insulators is used to perform high-precision grinding of the inner diameter of porcelain insulators after sintering to obtain high-quality sintered porcelain insulators. The processing is carried out in the following sequence: positioning and clamping, rough grinding, fine grinding, and polishing.

[0025] In this embodiment, the main body of the inner diameter grinding device includes a processing machine and a grinding assembly. The processing machine is a horizontal machine, specifically including a main housing 1, a support frame 15, and a guide slide 23, used to position and clamp the porcelain insulator 5 to be processed. The main housing 1 is equipped with electrical control components and a drive part for mechanical parts to realize the function of the equipment. A power box 2 is connected to the upper part of the main housing 1. The power box 2 has a built-in drive motor, and an active rotating seat 3 is assembled at the output end of the drive motor. The driven rotating seat 9, which is opposite to the active rotating seat 3, is set on the second guide slide rail 20 through the guide seat 21. The active rotating seat 3 and the driven rotating seat 9 are aligned and corrected. The second guide slide rail 20 is set on the support frame 15, and the guide seat 21 can move relative to the porcelain insulator 5 to be processed along the axial direction through the second guide slide rail 20.

[0026] The active rotating seat 3 and the driven rotating seat 9 have reserved assembly positions. The active rotating seat 3 and the driven rotating seat 9 are equipped with a first end face pressure plate 4 and a second end face pressure plate 11 through their respective assembly positions using existing detachable assembly methods such as chucks and threaded fastening. The first end face pressure plate 4 and the second end face pressure plate 11 correspond to the two end faces of the porcelain insulator 5 to be processed, respectively. They can be used as pressure plates to hold and fix the porcelain insulator 5 to be processed by the opposing movement of the support frame 15 through the second guide slide rail 20, thereby completing the centering and end face assembly and fixation of the porcelain insulator 5 to be processed. The first end face pressure plate 4 is directly assembled and connected to the active rotating seat 3 and can be actively rotated by the motor in the power box 2. The second end face pressure plate 11 is fixedly assembled to the driven rotating seat 9 at the outer edge of the plate through the bearing seat 10 and can be passively rotated in the driven rotating seat 9 through the bearing seat 10. The porcelain insulator 5 to be processed in the assembled state can rotate around the axis between the active rotating seat 3 and the driven rotating seat 9 via the first end face pressure plate 4 and the second end face pressure plate 11. By replacing different first end face pressure plates 4 and second end face pressure plates 11 and adjusting the position of the driven rotating seat 9 on the second guide rail 20, the size of the porcelain insulator 5 to be processed can be adjusted to meet the inner diameter grinding requirements of porcelain insulators of different specifications.

[0027] In this embodiment, the support frame 15 is also provided with a set of first guide rails 16, which are also arranged along the axial direction of the porcelain insulator 5 to be processed. The first guide rail 16 is provided with three supports 17, each of which is a V-shaped or Y-shaped structure frame. The bottom of the V-shaped or Y-shaped structure frame is set on the first guide rail 16 through a guide seat with a position locking mechanism. The support frame 17 can move along the first guide rail 16 through the guide seat and is locked in place by the locking mechanism. The two side arms 18 of the support frame 17 are electrically controlled telescopic structures, and the top of the support arm 28 is formed with a support wheel 19. The support wheel 19 is a driven wheel structure, and each support frame 17 can support the porcelain insulator 5 to be processed at the connecting neck position between the corresponding umbrella section 6 on both sides through the support wheel 19 at the end of the V-shaped or Y-shaped structure frame support arm 28. By adjusting the first guide rail 16 and the guide seat, as well as the position of the support arm 18, the size of the porcelain insulator 5 to be processed can be adjusted to meet the grinding requirements of the inner diameter of porcelain insulators of different specifications.

[0028] In this embodiment, the grinding assembly of the device is disposed on one side of the driven rotary seat 9, that is, corresponding to... Figure 1On the right side of the processing machine shown, the grinding assembly is mounted on the outer end of the grinding guide 8. The grinding guide 8 is a long, straight, rigid frame structure. The extended end of the grinding guide 8 on the right side of the processing machine is mounted on an electrically controlled guide telescopic support 12. The lower part of the electrically controlled guide telescopic support 12 is mounted on a guide slide 23 via a lifting adjustment support 13. The bottom of the guide slide 23 is provided with a slide rail and is connected to the support frame 15 on the left side via a translation bracket 22. By extending and retracting the translation bracket 22, the guide slide 23 can move relative to the support frame 15 to the opposite position. The grinding guide 8 is used to feed the grinding assembly into the inner cavity of the porcelain insulator 5 to be processed, and through its own guiding movement along the axial direction of the porcelain insulator 5 to be processed, it cooperates with the grinding assembly to complete the grinding operation on the inner diameter surface of the porcelain insulator 5 to be processed; in order to facilitate the insertion of the grinding guide 8, the driven rotary seat 9 has a processing hole corresponding to the inner hole of the porcelain insulator 5 to be processed reserved in the middle position of the second end face pressure plate 11 on the corresponding side.

[0029] The structural style of the grinding assembly is as follows Figure 2 As shown, the assembly includes a first grinding section driven by a first motor drive base 25 and a second grinding section driven by a second motor drive base 7. In operation, the first and second grinding sections of the grinding assembly are located on a straight line parallel to the axis of the ceramic insulator 5 to be processed, and this straight line is located between the two support rollers 19 of any support frame 17. This allows the support rollers 19 to support the lower part of the processing surface while the grinding assembly presses down on the upper surface of the processing surface to reduce processing errors. To improve the usability and maintainability of the equipment, both the first and second grinding sections of the grinding assembly are designed to be detachable.

[0030] In this embodiment, the first grinding unit serves as the main execution unit for the rough grinding process, including a grinding head 26. This grinding head 26 is driven to rotate by the first motor drive seat 25, and cooperates with the rotation of the porcelain insulator 5 during processing to achieve inner diameter grinding. The grinding body of the grinding head 26 is a silicon carbide grinding body, which can be spherical, bullet-shaped, or bulb-shaped in different embodiments. In this embodiment, the grinding body of the grinding head 26 adopts a bulb-shaped structure. A ring groove is formed at the head of the grinding body of the grinding head 26, and a grinding ring 29 made of chromium corundum ceramic is formed at this ring groove.

[0031] Grinding head 26 operates as follows Figure 3The pattern shown is obliquely attached to the inner diameter surface of the porcelain insulator 5 to be processed. The grinding ring 29 divides the processing part of the grinding head 26 on the inner diameter surface of the porcelain insulator 5 to be processed into three sections. The front section is ground by the grinding body of the grinding head 26, and its grinding depth ratio is 45~70%. The middle section is ground by the grinding ring 29 embedded on the grinding head 26, and its grinding depth ratio is 20~30%. The rear section is ground by the grinding body of the grinding head 26 to remove the remaining material.

[0032] To achieve the aforementioned grinding effect on porcelain insulators 5 of different sizes, the grinding head 26 requires different oblique feed angles. These oblique feed angles are adjusted via an electrically controlled hinge support 24, which is assembled and connected to the first motor drive seat 25. Simultaneously, the electrically controlled hinge support 24 can also be used to switch between the working and zero positions on the first grinding section. Specifically, the grinding head 26 can be rotated counterclockwise by the electrically controlled hinge support 24 to obliquely contact the inner diameter surface of the porcelain insulator 5 to enter the working position, and rotated clockwise by the electrically controlled hinge support 24 to move the grinding head 26 away from the inner diameter surface of the porcelain insulator 5 to enter the zero position, facilitating the removal of the grinding assembly.

[0033] In addition, in order to further improve the processing quality of the first grinding part on the grinding head 26 in this embodiment, the grinding head 26 has an annular groove formed on the upper and lower edges of the corresponding annular groove position of the grinding ring 29 as a chip removal groove 30. The chip removal groove 30 can discharge the waste and debris generated during the grinding process in a timely manner, keeping the grinding process clean and efficient.

[0034] The second polishing part is disposed at the base of the polishing assembly, including a ring 27 and a felt cloth 28 on the outer ring surface of the ring 27. The ring 27 is fixedly assembled with the second motor drive seat 7 and can be driven by the motor in the second motor drive seat 7 to rotate around the axis, so as to use the felt cloth 28 on the ring 27 to polish the surface that has been processed by the first polishing part again.

[0035] In this embodiment, the inner diameter grinding device for porcelain insulators uses the first end face pressure plate 4, the second end face pressure plate 11, and the bottom support arm 18 to position and clamp the porcelain insulator 5 during grinding operations, thereby ensuring the grinding accuracy and stability during the processing.

[0036] Then, the grinding guide 8 is used to feed the tool from the outside. Before feeding the tool, the lifting adjustment support 13 needs to be calibrated according to the size of the porcelain insulator 5 to be processed. After the calibration, the lifting adjustment support 13 can be used to switch the working position and zero position of the entire grinding assembly through coarse adjustment of the up and down position, and to reserve enough space for the grinding assembly to exit in the zero position. When feeding the tool, the feeding operation is achieved by the combination of the electrically controlled guide telescopic support 12 and the guide slide 23. This two-stage feeding method can effectively reduce the error caused by the center of gravity offset on the grinding guide 8.

[0037] During the feed process, the electrically controlled hinge support 24 switches the first grinding section to the working position, and at the same time, the first motor drive base 25 provides power to use the first grinding section for grinding. During this grinding process, the silicon carbide grinding head 26 and the chromium corundum ceramic grinding ring 29 on the first grinding section are used to perform a three-stage continuous grinding process on the inner diameter surface of the porcelain insulator 5 to be processed. This three-stage continuous grinding process integrates and optimizes the traditional multiple grinding process, avoiding multiple tool changes and centering operations, thereby greatly improving grinding efficiency and processing accuracy. The three-stage continuous grinding process of the first grinding section consists of two stages: the first stage, grinding with the grinding head 26, and the second stage, grinding with the grinding ring 29, which correspond to the rough grinding process in traditional technology. The grinding head 26 and the grinding ring 29 make bevel contact with the inner diameter surface of the porcelain insulator 5 to be processed, which can be used to remove larger surface defects and excess material, and remove grinding allowance. The second stage, grinding with the grinding head 26, corresponds to the fine grinding process in traditional technology. In this process, the grinding head 26 makes closer contact with the inner diameter surface of the porcelain insulator 5 to be processed, which is conducive to further refining the surface and achieving the required precision and smoothness.

[0038] After the first grinding section completes the rough grinding process, the second grinding section enters the working position as the grinding guide 8 is fed. At this time, the second motor drive seat 7 drives the ring sleeve 27 to rotate, and the fine grinding performance of the felt cloth 28 on the ring sleeve 27 is used to achieve the purpose of polishing, further eliminating the rough parts of the inner diameter surface, making the surface smoother, so as to improve the electrical performance and quality of the porcelain insulator 5 to be processed.

[0039] Throughout the grinding process, the chip removal groove 30 continuously discharges the generated waste and chips. At the same time, the continuously injected coolant can effectively keep the grinding area clean, further ensuring grinding quality and processing efficiency.

[0040] Furthermore, the inner diameter grinding device in this embodiment can also be equipped with an intelligent control system. This system is used to automate the above-mentioned processing and can monitor and control various parameters during the grinding process in real time, such as grinding speed, grinding depth, and grinding time, to ensure the stability and consistency of the grinding process. At the same time, the intelligent control system can also automatically adjust the clamping distance of the first end face pressure plate 4 and the second end face pressure plate 11, the supporting position of the support frame 17, the infeed position of the grinding guide 8, and the position and angle of the grinding head on the grinding assembly according to the different specifications and processing requirements of the porcelain insulators to be processed, so as to adapt to the inner diameter grinding needs of porcelain insulators of different sizes and shapes.

[0041] In summary, the inner diameter grinding device for porcelain insulators provided in this embodiment achieves high-precision grinding of the inner diameter of porcelain insulators through precise positioning and clamping, rough grinding, fine grinding, and polishing processes, thereby improving product quality and production efficiency. Furthermore, the device has a reasonable structural design, is easy to operate, and can adapt to the processing needs of porcelain insulators of different specifications and shapes, thus possessing broad application prospects.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A device for grinding the inner diameter of porcelain insulators, characterized in that, This includes the machining equipment and the grinding assembly; The processing machine is a horizontal machine used to support and place the porcelain insulators to be processed, and to center them during processing. The processing machine includes a support frame, on both sides of which are matched rotating seats. The porcelain insulators to be processed are assembled onto the rotating seats via an assembly part and can be rotated by the rotating seats. Multiple supports are provided at the bottom of the support frame along the length of the porcelain insulators to be processed. The supports are V-shaped or Y-shaped structures. Support wheels are formed at the top of the two side arms of the V-shaped or Y-shaped structures. The support wheels are driven wheels. The multiple supports support the bottom surface of the porcelain insulators to be processed between the umbrella sections. A grinding guide is provided on one side of the processing machine table. The grinding guide is a guide telescopic structure arranged along the length of the porcelain insulator to be processed. The grinding assembly is formed on the outer end of the grinding guide and includes a first grinding part and a second grinding part driven by a motor. The first grinding section is formed at the end of the grinding assembly and includes a grinding head, which is a spherical, bullet-shaped, or bulb-shaped silicon carbide grinding head. An annular groove is formed on the grinding head, and a grinding ring is formed at the position of the annular groove. The grinding ring is a chromium corundum ceramic grinding ring. When in working condition, the grinding head is obliquely attached to the inner diameter surface of the porcelain insulator to be processed, so that the first grinding section can perform three-stage continuous grinding of the inner diameter surface of the porcelain insulator to be processed in the first grinding section during the processing, passing through the front grinding head, the grinding ring, and the rear grinding head in sequence. The second grinding part is formed on the base of the grinding assembly, including a ring and a felt cloth on the outer ring surface of the ring. The second grinding part uses the felt cloth as the grinding surface to perform a felt polishing operation on the inner diameter surface of the porcelain insulator to be processed after being treated by the first grinding part. During the three-stage continuous grinding process of the porcelain insulator to be processed on the first grinding section, the grinding depth ratio of the front grinding head is 45~70%, the grinding depth ratio of the grinding ring is 20~30%, and the rear grinding head is used to grind the remaining material.

2. The grinding device for the inner diameter of porcelain insulators according to claim 1, characterized in that, The rotating seats located on both sides of the support frame include an active rotating seat and a driven rotating seat. The active rotating seat is assembled and connected to the drive motor on the outside and is driven by the drive motor to rotate. The active rotating seat and the driven rotating seat are respectively equipped with a first end face pressure plate and a second end face pressure plate in a detachable assembly manner. The first end face pressure plate and the second end face pressure plate have corresponding mating end faces of the porcelain insulator to be processed. The first end face pressure plate and the second end face pressure plate are fixed on the two end faces of the porcelain insulator to be processed as holding pressure plates.

3. The inner diameter grinding device for porcelain insulators according to claim 2, characterized in that, The grinding guide is located on one side of the driven rotary seat, and the second end face pressure plate on the corresponding side of the driven rotary seat has a pre-reserved processing hole for the inner hole of the porcelain insulator to be processed.

4. The inner diameter grinding device for porcelain insulators according to claim 1, characterized in that, The support frame is equipped with a guide rail, which is arranged along the length of the porcelain insulator to be processed. The support frame is set on the guide rail by a guide seat with a position locking mechanism, and can move and lock its position along the guide rail by the guide seat.

5. The grinding device for the inner diameter of porcelain insulators according to claim 1, characterized in that, The two side arms of the support frame are electrically controlled telescopic structures, and the support wheels can be adjusted in position through the electrically controlled telescopic structures.

6. The inner diameter grinding device for porcelain insulators according to claim 1, characterized in that, In the working state, the first grinding part and the second grinding part of the grinding assembly are located on a straight line parallel to the axis of the porcelain insulator to be processed, and the straight line is located between the two supporting rollers of any support frame.

7. The grinding device for the inner diameter of porcelain insulators according to claim 1, characterized in that, The second grinding part has a ring sleeve that is detachably assembled on the base of the grinding assembly.

8. The grinding device for the inner diameter of porcelain insulators according to claim 1, characterized in that, The grinding assembly has an electrically controlled hinge support formed at its end, and the first grinding part is formed on the electrically controlled hinge support.

9. The grinding device for the inner diameter of porcelain insulators according to claim 1, characterized in that, The grinding head has an annular groove formed on the outer edge of the upper and lower parts of the chromium corundum ceramic grinding ring formed in the corresponding annular groove, which serves as a chip removal groove.

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