Sleeve end circumferential grinding device for weld joint repair

Abstract

A sleeve end circumferential grinding device for weld joint repair belongs to the technical field of sleeve grinding, is used for performing circumferential grinding on the end of a sleeve, and comprises a workbench, a hollow cylinder, a rotating shaft, a turntable, a linkage rod, a driving arm and an arc-shaped plate, and the hollow cylinder is rotatably arranged above the workbench; the rotating shaft is rotatably and vertically mounted at the top end of the outer side wall of the hollow cylinder; the turntable is fixedly mounted on the rotating shaft. According to the utility model, the sleeves with different diameters and the hollow cylinder are ensured to be coaxial and concentric through the positioning mechanism, secondary alignment is not needed, and the automation degree and the positioning precision are improved; the two groups of arc-shaped plates which symmetrically move are automatically adaptive to sleeves of multiple specifications, so that the positioning process is simplified, and the remodeling time is shortened; the turntable is rotated to synchronously adjust the spacing and lock, so that the stability and the grinding uniformity of the clamp are guaranteed; the hollow cylinder capable of rotating stably drives the sleeve to fix the grinding disc, excessive grinding or insufficient grinding is avoided, control logic is simplified, and the requirement for multiple rotating speeds is met.

Description

Technical Field

[0001] This utility model belongs to the field of sleeve grinding technology, specifically relating to a sleeve end circumferential grinding device for weld repair. Background Technology

[0002] In weld repair, sleeves are often used to fill or reinforce damaged areas, and circumferential grinding of their ends is a key process to ensure repair quality. Specifically, before installation, the outer diameter of the sleeve end needs to be circumferentially ground. A grinding wheel or abrasive is used to uniformly cut the circumferential surface of the end to eliminate machining errors, burrs, and surface defects. This ensures that the dimensional accuracy, surface roughness, and roundness error of the sleeve end meet assembly requirements, making it an important process to guarantee the reliability and safety of the repaired parts.

[0003] A related technology (Chinese utility model patent with publication number CN212824738U) discloses a positioning device for convenient grinding of the outer edge of a sleeve, including an outer fixed plate and a mandrel. A locking shaft is connected to the upper right end of the outer fixed plate, and a connecting arm is provided on the outer side of the locking shaft. The connecting arm is connected to a stud via a connecting nut, and a stud is provided at the center of the top of the connecting arm. An inner plate is connected to the center of the outer fixed plate, and a bushing is fitted inside the inner plate. A first stop post is fixed to one side of the bushing, and the bushing has internal threads. This positioning device for convenient grinding of the outer edge of a sleeve features a bushing, and the threaded head with matching structural dimensions connects with the internal threads inside the bushing, thus fixing the mandrel integrated with the threaded head to the bushing. This increases the bushing's firmness, allowing it to restrain the sleeve mounted on the mandrel and prevent it from falling off. Furthermore, the fixedly connected bushing can be disassembled along the direction of the threaded head, facilitating the removal and handling of the ground sleeve.

[0004] In existing sleeve end circumferential grinding technology, for sleeves of different diameters, it is necessary to ensure the coaxiality of the positioning fixture and the sleeve axis during the positioning process to ensure the uniformity of sleeve circumferential grinding. Therefore, it is particularly necessary to propose a sleeve end circumferential grinding device with adaptive coaxial positioning function for weld repair. Utility Model Content

[0005] To address the problem in existing technologies where ensuring the coaxiality of the positioning fixture and the sleeve's axis is crucial for uniform circumferential grinding of sleeves with different diameters, this invention provides a circumferential grinding device for the end of a sleeve used in weld repair. Through an adaptive positioning mechanism, it automatically aligns the axis of sleeves with different diameters, eliminating the cumbersome secondary alignment process of traditional methods and significantly improving the automation level and consistency of axis positioning accuracy in the grinding process. The specific technical solution is as follows:

[0006] A circumferential grinding device for the end of a sleeve used for weld repair, for circumferential grinding of the end of the sleeve, includes: a worktable, a hollow cylinder, a rotating shaft, a turntable, a connecting rod, a drive arm, and an arc-shaped plate. The hollow cylinder is rotatably disposed above the worktable; the rotating shaft is rotatably and vertically mounted on the top of the outer wall of the hollow cylinder; the turntable is fixedly mounted on the rotating shaft; two connecting rods are provided, one end of each connecting rod is rotatably connected to the turntable, and the two connecting rods are symmetrically arranged with respect to the center of the turntable; the drive arm is fixedly mounted on the other end of the connecting rod, the drive arm is U-shaped, and the drive arm slides through the side wall of the hollow cylinder; the arc-shaped plate is fixedly and vertically mounted on the free end of the drive arm.

[0007] The center of the distance between the two arc-shaped plates is coaxial and collinear with the center of the hollow cylinder, and the sleeve is positioned between the two arc-shaped plates.

[0008] In the above technical solution, a locking component is provided at the turntable. The locking component includes: a fixing block, a positioning bolt, a positioning nut, and threaded holes. The fixing block is fixedly installed on the side wall of the turntable. The positioning bolt is threaded through the fixing block in the vertical direction. The positioning nut is threaded onto the bottom end of the positioning bolt and fits against the inner side wall of the hollow cylinder. Multiple threaded holes are provided, and the multiple threaded holes are respectively opened through the hollow cylinder. The inner wall of the threaded hole is provided with an internal thread that matches the positioning bolt. The threaded hole is threaded into the inner cavity of one of the positioning bolts.

[0009] In the above technical solution, the multiple threaded holes are equidistantly arranged circumferentially with the center of the turntable as the axis.

[0010] In the above technical solution, the hollow cylinder rotates circumferentially via a drive assembly. The drive assembly includes a gear ring, a first motor frame, a first motor, a first drive shaft, and a gear. The gear ring is fixedly installed on the outer wall of the hollow cylinder and is coaxially and concentrically arranged with the hollow cylinder. The first motor frame is fixedly installed on the worktable. The first motor is installed on the first motor frame. One end of the first drive shaft is connected to the output end of the first motor. The gear is fixedly installed on the other end of the first drive shaft and meshes with the side wall of the gear ring.

[0011] In the above technical solution, a limiting guide assembly is provided on the outer side of the hollow cylinder. The limiting guide assembly includes: a support arm, a fixed seat, a triangular plate, a first limiting wheel, a second limiting wheel, a first limiting ring, and a second limiting ring. The support arm is fixedly installed on the worktable. Four fixed seats are provided, with each pair of fixed seats correspondingly installed on the support arm and the worktable. The triangular plate is fixedly installed on the fixed seat. The first limiting wheel and the second limiting wheel are rotatably connected to the triangular plate, and the first limiting wheel and the second limiting wheel roll against the outer wall of the hollow cylinder. The first limiting ring and the second limiting ring are fixedly installed on the outer wall of the hollow cylinder, and a limiting space is formed between the first limiting ring and the second limiting ring for the first limiting wheel and the second limiting wheel to roll.

[0012] In the above technical solution, the first limiting wheel and the second limiting wheel roll in cooperation along the opposite sidewalls of the first limiting ring and the second limiting ring.

[0013] In the above technical solution, a grinding assembly is provided on the workbench. The grinding assembly includes: a second motor frame, a second motor, a second drive shaft, and a grinding disc. The second motor is installed inside the second motor frame. One end of the second drive shaft is connected to the output end of the second motor. The grinding disc is fixedly connected to the other end of the second drive shaft.

[0014] In the above technical solution, the grinding assembly is adjusted for height by a lifting assembly, which includes a cylinder, a lifting seat, a slider, and a guide rod. The cylinder is fixed and vertically mounted on the worktable; the lifting seat is fixed and vertically mounted on the output end of the cylinder, and the lifting seat is fixedly connected to the side wall of the second motor frame; two sliders are provided, and the two sliders are respectively fixedly mounted on the left and right side walls of the lifting seat; the guide rod is fixed and vertically mounted on the worktable, and the slider is slidably sleeved on the guide rod.

[0015] In the above technical solution, the sleeve and the grinding disc are perpendicular to each other.

[0016] In the above technical solution, a clearance groove is provided on the rear side wall of the workbench.

[0017] The circumferential grinding device for the end of a sleeve used for weld repair of this utility model has the following advantages compared with the prior art:

[0018] I. For sleeves of different diameters, it is necessary to ensure the coaxiality of the positioning fixture and the sleeve axis during the positioning process to ensure the uniformity of circumferential grinding of the sleeve. In this utility model, after the two sets of arc plates complete the positioning of sleeves of different diameters, it can ensure that the sleeve is in a coaxial and concentric state inside the hollow cylinder, thereby enabling the hollow cylinder to drive the sleeve to achieve circumferential rotation. By cooperating with the grinding disc in a fixed position, the outer circumferential surface of the sleeve end can be uniformly ground, thereby ensuring grinding accuracy and surface consistency. This device can achieve automatic alignment of the axis of sleeves of different diameters through an adaptive positioning mechanism, eliminating the need for the cumbersome secondary alignment process in traditional processes, significantly improving the automation level of grinding and the consistency of axis positioning accuracy.

[0019] II. In this utility model, through the coordinated action of components such as the turntable, connecting rod, and drive arm, symmetrical movement of two sets of arc plates within the hollow cylinder can be achieved. Regardless of how the distance between the two sets of arc plates is adjusted, the center point of their distance remains coaxial with the center of the hollow cylinder. This ensures that sleeves of different diameters automatically align with the center of the hollow cylinder after positioning between the two sets of arc plates. This device requires no additional adjustment steps and can directly guarantee that the positioned sleeve is coaxial and coaxial with the hollow cylinder, effectively simplifying the sleeve positioning process and improving efficiency. Regardless of how the sleeve diameter changes, only the coaxiality within the hollow cylinder needs to be adjusted through the positioning mechanism, without the need to recalibrate the sleeve position. This significantly improves the equipment's adaptability to multiple sleeve specifications and reduces changeover time.

[0020] Third, in this utility model, the spacing between the two sets of arc plates can be adjusted synchronously by rotating the turntable. This structural design ensures that the displacement of the two sets of arc plates is symmetrical. After adjustment, the turntable is positioned and locked by positioning bolts, threaded holes and other components to ensure the stability of the overall clamping system after the two sets of arc plates clamp and position the sleeve. This stability can ensure that the subsequently rotating sleeve maintains stable rotation, thereby achieving uniformity of circumferential grinding of the sleeve.

[0021] IV. The first limiting ring, second limiting ring, first limiting wheel, and second limiting wheel of this utility model can limit the circumferentially stable rotation of the hollow cylinder, thereby ensuring that the sleeves of different diameters after being clamped and positioned inside the hollow cylinder maintain stable circumferential rotation. Compared with the traditional method of grinding around the circumferential edge of the sleeve by the grinding disc, when the sleeve rotates, all points on the circumference pass through the grinding area of ​​the grinding disc at the same linear speed, avoiding the problem of local over-grinding or under-grinding caused by the deviation of the grinding path in the traditional process, ensuring that the circumferential grinding thickness at the end is consistent, and the structure of fixing the grinding disc simplifies the grinding wheel motion control logic, eliminating the need for complex trajectory planning, and can directly match different grinding requirements by adjusting the rotation speed of the hollow cylinder.

[0022] In summary, this utility model ensures that sleeves of different diameters are coaxial and concentric with the hollow cylinder through a positioning mechanism, eliminating the need for secondary alignment and improving automation and positioning accuracy; two sets of symmetrically moving arc plates automatically adapt to sleeves of various specifications, simplifying the positioning process and reducing changeover time; the rotating turntable synchronously adjusts and locks the spacing, ensuring fixture stability and grinding uniformity; the stable rotating hollow cylinder drives the sleeves through the fixed grinding disc, avoiding over-grinding or under-grinding, simplifying control logic and adapting to multiple speed requirements. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the support arm of this utility model;

[0024] Figure 2 for Figure 1 Enlarged view of point A;

[0025] Figure 3 This is the front view of the arc-shaped plate of this utility model;

[0026] Figure 4 This is a rear view schematic diagram of the clearance groove of this utility model;

[0027] Figure 5 for Figure 4 Enlarged view of point B;

[0028] Figure 6 This is a top view of the drive arm of this utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the first limiting ring of this utility model;

[0030] Figures 1 to 7 In the middle, 1. Workbench, 2. Clearance groove, 3. Support arm, 4. Fixed seat, 5. Triangular plate, 6. First limit wheel, 7. Second limit wheel, 8. Hollow cylinder, 9. First limit ring, 10. Second limit ring, 11. Gear ring, 12. First motor frame, 13. First motor, 14. First drive shaft, 15. Gear, 16. Arc plate, 17. Turntable, 18. Rotating shaft, 19. Linking rod, 20. Drive arm, 21. Fixed block, 22. Positioning bolt, 23. Positioning nut, 24. Threaded hole, 25. Cylinder, 26. Lifting seat, 27. Second motor frame, 28. Second motor, 29. Second drive shaft, 30. Grinding disc, 31. Slider, 32. Guide rod, 33. Sleeve. Detailed Implementation

[0031] The following are specific implementation cases and appendices. Figures 1 to 7 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0032] A circumferential grinding device for the end of a sleeve used for weld repair, for circumferential grinding of the end of a sleeve 33, includes: a worktable 1, a hollow cylinder 8, a rotating shaft 18, a turntable 17, a connecting rod 19, a drive arm 20, and an arc-shaped plate 16. The hollow cylinder 8 is rotatably mounted above the worktable 1; the rotating shaft 18 is rotatably mounted and vertically installed on the top of the outer wall of the hollow cylinder 8; the turntable 17 is fixedly mounted on the rotating shaft 18; two connecting rods 19 are provided, and one end of each connecting rod 19 is respectively... The drive arm 20 is fixedly installed on the other end of the drive arm 19 and is configured as a "U" shape. The drive arm 20 slides through the side wall of the hollow cylinder 8. The arc plate 16 is fixedly and vertically installed on the free end of the drive arm 20. The center of the distance between the two arc plates 16 is coaxial and collinear with the center of the hollow cylinder 8. The sleeve 33 is positioned between the two arc plates 16.

[0033] When positioning sleeves 33 of different diameters before grinding, the sleeves 33 are first placed between two arc-shaped plates 16. Then, the rotating shaft 18 is rotated, causing the turntable 17 to rotate clockwise. This causes the two connecting rods 19 on the turntable 17 to rotate symmetrically about the rotating shaft 18. Since the two driving arms 20 slide through the side wall of the hollow cylinder 8, the movement of the connecting rods 19 will pull the two driving arms 20 to move towards each other in the middle, which in turn causes the two arc-shaped plates 16 to move towards each other in the middle, gradually clamping and positioning the outer wall of the sleeves 33. Since the center of the distance between the two arc-shaped plates 16 is always coaxial and collinear with the center of the hollow cylinder 8, the positioned sleeves 33 will automatically be coaxially set with the hollow cylinder 8 without the need for other adjustment steps.

[0034] In this invention, when positioning sleeves 33 of different diameters, the axis of the sleeve 33 and the hollow cylinder 8 can be precisely aligned, achieving a coaxial and concentric positioning effect. Furthermore, the rotation of the hollow cylinder 8 drives the sleeve 33 to rotate circumferentially. Combined with the grinding disc 30 in a fixed position, uniform grinding can be performed on the outer circumferential surface of the sleeve 33 end, effectively ensuring the consistency of grinding accuracy and surface quality after processing. Compared to traditional processes, this invention eliminates the cumbersome secondary alignment process, achieving automatic alignment of the axis of sleeves of different diameters through an adaptive positioning mechanism, significantly improving the automation level of the grinding process and substantially enhancing the consistency of axis positioning accuracy.

[0035] Furthermore, through the coordinated operation of components such as the turntable 17, connecting rod 19, and drive arm 20, the two sets of arc-shaped plates 16 can move symmetrically within the hollow cylinder 8, ensuring that regardless of the adjustment of the distance between the two sets of arc-shaped plates 16, the center point of their distance remains coaxial with the center of the hollow cylinder 8. Therefore, when sleeves 33 of different diameters are positioned between the two sets of arc-shaped plates 16, they automatically become concentric with the center of the hollow cylinder 8 without additional adjustment steps, directly ensuring that the positioned sleeves 33 are coaxial and concentric with the hollow cylinder 8. This effectively simplifies the positioning process of the sleeves 33 and improves work efficiency. Moreover, regardless of the diameter of the sleeves 33, only the coaxiality within the hollow cylinder 8 needs to be adjusted through the positioning mechanism; there is no need to recalibrate the position of the sleeves 33, significantly improving the equipment's adaptability to multiple sleeve specifications and reducing changeover time.

[0036] For details, please refer to the main references. Figure 4 and Figure 5 As shown, a locking assembly is provided at the turntable 17. The locking assembly includes: a fixing block 21, a positioning bolt 22, a positioning nut 23, and threaded holes 24. The fixing block 21 is fixedly installed on the side wall of the turntable 17. The positioning bolt 22 is threaded through the fixing block 21 in the vertical direction. The positioning nut 23 is threaded onto the bottom end of the positioning bolt 22 and fits against the inner side wall of the hollow cylinder 8. Multiple threaded holes 24 are provided, and multiple threaded holes 24 are respectively opened through the hollow cylinder 8. The inner wall of the threaded hole 24 is provided with an internal thread that matches the positioning bolt 22. The threaded hole 24 is threaded and embedded in the inner cavity of one of the positioning bolts 22. The multiple threaded holes 24 are equidistantly arranged circumferentially with the center of the turntable 17 as the axis, thereby ensuring that the turntable 17 can still cause the positioning bolt 22 to align with the inner cavity of one of the threaded holes 24 after rotation, so as to lock the turntable 17 by the subsequent positioning bolt 22 being threaded and embedded in the threaded hole 24.

[0037] After adjustment, screw the positioning bolt 22 into the inner cavity of the threaded hole 24 at the corresponding position after adjustment to form a tight threaded connection. Then, thread the positioning nut 23 onto the bottom end of the positioning bolt 22 so that it is tightly attached to the inner wall of the hollow cylinder 8. The position of the turntable 17 is locked by the synergistic action of the positioning nut 23 and the positioning bolt 22.

[0038] In this invention, the distance between the two sets of arc-shaped plates 16 can be adjusted synchronously by rotating the turntable 17, ensuring symmetrical displacement of the two sets of arc-shaped plates 16. After the distance is adjusted, the turntable 17 is locked and positioned using components such as positioning bolts 22 and threaded holes 24, thereby maintaining the stability of the overall clamping system after the two sets of arc-shaped plates 16 clamp the sleeve 33. With this high stability, the subsequently rotating sleeve 33 can maintain stable operation, ultimately achieving a uniform circumferential grinding effect on the sleeve 33.

[0039] Main references Figure 3 and Figure 7 As shown, the hollow cylinder 8 rotates circumferentially via a drive assembly, which includes a gear ring 11, a first motor frame 12, a first motor 13, a first drive shaft 14, and a gear 15. The gear ring 11 is fixedly mounted on the outer wall of the hollow cylinder 8 and is coaxially and concentrically arranged with the hollow cylinder 8. The first motor frame 12 is fixedly mounted on the worktable 1. The first motor 13 is mounted on the first motor frame 12. One end of the first drive shaft 14 is connected to the output end of the first motor 13. The gear 15 is fixedly mounted on the other end of the first drive shaft 14 and meshes with the side wall of the gear ring 11. After positioning, the first drive shaft 14 and the gear 15 are rotated by the activated first motor 13, so that the gear ring 11 drives the hollow cylinder 8 to rotate circumferentially.

[0040] A limiting guide assembly is provided on the outer side of the hollow cylinder 8. The limiting guide assembly includes: a support arm 3, a fixed seat 4, a triangular plate 5, a first limiting wheel 6, a second limiting wheel 7, a first limiting ring 9, and a second limiting ring 10. The support arm 3 is fixedly installed on the workbench 1. Four fixed seats 4 are provided, with each pair of fixed seats 4 correspondingly installed on the support arm 3 and the workbench 1. The triangular plate 5 is fixedly installed on the fixed seat 4. The first limiting wheel 6 and the second limiting wheel 7 are rotatably connected to the triangular plate 5 through bearings. The positioning wheels 7 roll against the outer side wall of the hollow cylinder 8 respectively; the first limiting ring 9 and the second limiting ring 10 are fixedly installed on the outer side wall of the hollow cylinder 8 respectively, and a limiting space is formed between the first limiting ring 9 and the second limiting ring 10 for the first limiting wheel 6 and the second limiting wheel 7 to roll; the first limiting wheel 6 and the second limiting wheel 7 roll along the opposite side wall of the first limiting ring 9 and the second limiting ring 10, thereby ensuring that the hollow cylinder 8 maintains its centered rotation when the first limiting wheel 6 and the second limiting wheel 7 roll relative to each other between the first limiting ring 9 and the second limiting ring 10;

[0041] After positioning is completed, the first motor 13 is started to drive the first drive shaft 14 and gear 15 to rotate, which in turn drives the gear ring 11 to drive the hollow cylinder 8 to rotate circumferentially. Since the first limiting ring 9 and the second limiting ring 10 form a limiting guide space, under its limiting action, multiple sets of first limiting wheels 6 and second limiting wheels 7 on the outer wall of the rotating hollow cylinder 8 roll relative to each other along the side wall of the hollow cylinder 8, ensuring that the hollow cylinder 8 maintains a stable angle and no deviation when it rotates.

[0042] The workbench 1 is equipped with a grinding assembly, which includes: a second motor frame 27, a second motor 28, a second drive shaft 29, and a grinding disc 30. The second motor 28 is installed inside the second motor frame 27; one end of the second drive shaft 29 is connected to the output end of the second motor 28; and the grinding disc 30 is fixedly connected to the other end of the second drive shaft 29.

[0043] The grinding assembly is raised and lowered via a lifting assembly, which includes a cylinder 25, a lifting seat 26, a slider 31, and a guide rod 32. The cylinder 25 is fixed and vertically mounted on the worktable 1. The lifting seat 26 is fixed and vertically mounted on the output end of the cylinder 25, and is fixedly connected to the side wall of the second motor frame 27. Two sliders 31 are provided, and the two sliders 31 are fixedly mounted on the left and right side walls of the lifting seat 26, respectively. The guide rod 32 is fixed and vertically mounted on the worktable 1, and the sliders 31 are slidably sleeved on the guide rod 32. The sleeve 33 and the grinding disc 30 are perpendicular to each other.

[0044] When the hollow cylinder 8 starts to rotate, the sleeve 33, which is located in the inner cavity and centrally positioned, rotates synchronously. At the same time, the second motor 28 is started to drive the second drive shaft 29 and the grinding disc 30 to rotate circumferentially. The horizontally rotating grinding disc 30 continuously acts on the circumference of the end of the vertically rotating sleeve 33. Through relative motion, uniform grinding of the end of the sleeve 33 is achieved, ensuring the consistency of its circumferential machining accuracy.

[0045] In addition, the main references Figure 4 As shown, a clearance groove 2 is provided on the rear side wall of the workbench 1. The clearance groove 2 can provide space for the rotation of components such as the hollow cylinder 8 and the drive arm 20, and avoid interference with the rotation of the above components.

[0046] It is worth noting that the cylinder 25 used in this application is a commonly used self-locking cylinder, whose output end can stay at any position and be locked; the first motor 13 and the second motor 28 are commonly used self-locking motors whose output ends can be locked, and their output ends can be self-locked when they stop, preventing them from rotating under external force. Moreover, the first motor 13 and the second motor 28 are commonly used forward and reverse motors, and their output ends can rotate in the forward or reverse direction according to the usage requirements, which is sufficient to meet the above usage requirements; in addition, this equipment is equipped with a commonly used PLC controller in the market, which can control the start and stop of electrical components in this solution and other command processing. This is prior art, and the model of the above-mentioned existing components will not be limited or described in detail here.

[0047] The working principle of the circumferential grinding device at the end of the sleeve for weld repair in this embodiment is as follows:

[0048] When positioning sleeves 33 of different diameters before grinding, the sleeve 33 is placed between two arc plates 16. The rotating shaft 18 drives the turntable 17 to rotate clockwise, so that the two connecting rods 19 on the turntable 17 rotate symmetrically about the rotating shaft 18. Since the two driving arms 20 slide through the side wall of the hollow cylinder 8, the movement of the connecting rods 19 can pull the two driving arms 20 to move towards the center, so that the two arc plates 16 move towards the center and gradually clamp and position the outer wall of the sleeve 33. Since the center of the distance between the two arc plates 16 is always coaxial and collinear with the center of the hollow cylinder 8, the positioned sleeve 33 is automatically coaxial with the hollow cylinder 8 without any other adjustment steps.

[0049] After adjustment, screw the positioning bolt 22 into the inner cavity of the corresponding threaded hole 24 to form a tight threaded connection, and thread the positioning nut 23 onto the bottom end of the positioning bolt 22 to make the positioning nut 23 fit tightly against the inner wall of the hollow cylinder 8, so that the positioning nut 23 and the positioning bolt 22 lock the position of the turntable 17.

[0050] After positioning, the first drive shaft 14 and gear 15 are rotated by the activated first motor 13, which causes the gear ring 11 to drive the hollow cylinder 8 to rotate circumferentially. Since a limiting guide space is formed between the first limiting ring 9 and the second limiting ring 10, the rotating hollow cylinder 8 is limited by the first limiting ring 9 and the second limiting ring 10, causing the multiple sets of first limiting wheels 6 and second limiting wheels 7 on the outer wall of the hollow cylinder 8 to rotate relative to the side wall of the hollow cylinder 8, ensuring that the hollow cylinder 8 will not be tilted at an angle while rotating. During the rotation of the hollow cylinder 8, the sleeve 33, which is positioned in the center of the inner cavity of the hollow cylinder 8, rotates synchronously. Under the action of the activated second motor 28, the second drive shaft 29 and the grinding disc 30 are rotated circumferentially. The grinding disc 30, which rotates in the horizontal direction, continuously grinds the end circumference of the sleeve 33, which rotates in the vertical direction, so as to achieve uniform grinding processing of the end circumference of the sleeve 33.

[0051] In this invention, the positioning mechanism ensures that sleeves 33 of different diameters are coaxial and concentric with the hollow cylinder 8, eliminating the need for secondary alignment and improving automation and positioning accuracy. The two sets of symmetrically moving arc plates 16 automatically adapt to sleeves of various specifications, simplifying the positioning process and reducing changeover time. The rotating turntable 17 synchronously adjusts the spacing and locks it, ensuring the stability of the fixture and the uniformity of grinding. The stable rotating hollow cylinder 8 drives the sleeves 33 through the fixed grinding disc 30, avoiding over-grinding or under-grinding, simplifying the control logic and adapting to multiple speed requirements.

[0052] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0053] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0054] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0055] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0056] Unless otherwise stated, the term "multiple" means two or more.

[0057] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0058] The term "and / or" describes the relationship between objects, indicating that there can be three relationships. For example, A and / or B means: A or B, or A and B.

[0059] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A circumferential grinding device for the end of a sleeve used for weld repair, for circumferentially grinding the end of a sleeve (33), characterized in that: include: Workbench (1); Hollow cylinder (8), which is rotatably disposed above the workbench (1); A rotating shaft (18) is rotatable and vertically mounted on the top of the outer wall of the hollow cylinder (8); Turntable (17), which is fixedly mounted on the rotating shaft (18); Linkage rod (19), two linkage rods (19) are provided, and one end of each linkage rod (19) is rotatably connected to the turntable (17), and the two linkage rods (19) are symmetrically arranged with respect to the center of the turntable (17); Drive arm (20), the drive arm (20) is fixedly installed at the other end of the connecting rod (19), the drive arm (20) is set in the shape of "U", and the drive arm (20) slides through the side wall of the hollow cylinder (8); Arc plate (16), which is fixed and vertically installed at the free end of the drive arm (20); The center of the distance between the two arc-shaped plates (16) is coaxial and collinear with the center of the hollow cylinder (8), and the sleeve (33) is positioned between the two arc-shaped plates (16).

2. The circumferential grinding device for the end of a sleeve for weld repair according to claim 1, characterized in that: A locking component is provided at the turntable (17), the locking component comprising: A fixing block (21) is fixedly installed on the side wall of the turntable (17); Positioning bolt (22), the positioning bolt (22) is threaded through the fixing block (21) in the vertical direction; The positioning nut (23) is threaded onto the bottom end of the positioning bolt (22), and the positioning nut (23) is in contact with the inner wall of the hollow cylinder (8); Threaded holes (24) are provided in multiple ways. Multiple threaded holes (24) are respectively opened through the hollow cylinder (8). The inner wall of the threaded hole (24) is provided with an internal thread that is compatible with the positioning bolt (22). The threaded hole (24) is embedded in the inner cavity of one of the positioning bolts (22).

3. The circumferential grinding device for the end of a sleeve for weld repair according to claim 2, characterized in that: The multiple threaded holes (24) are equidistantly arranged circumferentially with the center of the turntable (17) as the axis.

4. The circumferential grinding device for the end of a sleeve for weld repair according to claim 1, characterized in that: The hollow cylinder (8) rotates circumferentially via a drive assembly, the drive assembly comprising: A toothed ring (11) is fixedly installed on the outer wall of the hollow cylinder (8), and the toothed ring (11) and the hollow cylinder (8) are coaxially and concentrically arranged. The first motor frame (12) is fixedly installed on the workbench (1); The first motor (13) is mounted on the first motor frame (12); The first drive shaft (14) has one end connected to the output end of the first motor (13); Gear (15), which is fixedly installed at the other end of the first drive shaft (14), and the gear (15) meshes with the side wall of the gear ring (11).

5. The circumferential grinding device for the end of a sleeve for weld repair according to claim 4, characterized in that: A limiting guide assembly is provided on the outer side of the hollow cylinder (8), the limiting guide assembly comprising: Support arm (3), which is fixedly installed on the workbench (1); Fixed base (4), four fixed bases (4) are provided, and every two fixed bases (4) are respectively installed on the support arm (3) and the worktable (1) in a corresponding manner; A triangular plate (5) is fixedly installed on the fixed base (4); The first limiting wheel (6) and the second limiting wheel (7) are rotatably connected to the triangular plate (5), and the first limiting wheel (6) and the second limiting wheel (7) roll against the outer wall of the hollow cylinder (8); The first limiting ring (9) and the second limiting ring (10) are fixedly installed on the outer side wall of the hollow cylinder (8), and a limiting space is formed between the first limiting ring (9) and the second limiting ring (10) for the first limiting wheel (6) and the second limiting wheel (7) to roll.

6. The circumferential grinding device for the end of a sleeve for weld repair according to claim 5, characterized in that: The first limiting wheel (6) and the second limiting wheel (7) roll along the opposite sidewalls of the first limiting ring (9) and the second limiting ring (10).

7. The circumferential grinding device for the end of a sleeve for weld repair according to claim 1, characterized in that: A polishing assembly is provided on the workbench (1), the polishing assembly comprising: Second motor frame (27); The second motor (28) is installed inside the second motor frame (27); The second drive shaft (29) has one end connected to the output end of the second motor (28); A grinding disc (30) is fixedly connected to the other end of the second drive shaft (29).

8. The circumferential grinding device for the end of a sleeve for weld repair according to claim 7, characterized in that: The grinding assembly is adjusted in height via a lifting assembly, which includes: Cylinder (25), which is fixed and vertically mounted on the worktable (1); Lifting seat (26), the lifting seat (26) is fixed and vertically installed on the output end of the cylinder (25), and the lifting seat (26) is fixedly connected to the side wall of the second motor frame (27); Slider (31), two sliders (31) are provided, and the two sliders (31) are respectively fixedly installed on the left and right side walls of the lifting seat (26); Guide rod (32) is fixed and vertically installed on the worktable (1), and slider (31) is slidably sleeved on guide rod (32).

9. The circumferential grinding device for the end of a sleeve for weld repair according to claim 8, characterized in that: The sleeve (33) and the grinding disc (30) are perpendicular to each other.

10. A sleeve end circumferential grinding device for weld repair according to claim 1, characterized in that: The rear side wall of the workbench (1) is provided with a clearance groove (2).

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