Polishing machine head and transfer type circular seam polishing equipment

Abstract

The invention relates to the field of mechanical polishing equipment, in particular to a polishing machine head and transfer type circular seam polishing equipment. The polishing machine head comprises a machine shell, one end of the machine shell is a connecting end, and the other end of the machine shell is a movable end; the driving belt wheel is rotationally arranged in the machine shell and is close to the connecting end; the axis direction of the rotary sleeve is the same as that of the driving belt wheel, and the rotary sleeve can rotate in situ and is arranged in the machine shell and close to the movable end in a locked mode; the plurality of support arms are arranged along the radial direction of the rotary sleeve and are fixed on the peripheral surface of the rotary sleeve in a central symmetry manner; the axis direction of the driven belt wheels is the same as that of the driving belt wheel, the diameters of the driven belt wheels are sequentially decreased, and the driven belt wheels are rotationally connected to the outer ends of the supporting arms and drive the supporting arms to rotate along with the rotary sleeve, so that the driven belt wheels sequentially protrude out of the movable end of the machine shell; the abrasive belt is connected to the driving belt wheel in a sleeving mode and at least can protrude out of the outer side of the driven belt wheel at the movable end of the machine shell. The device can automatically adapt to grinding of circumferential welds with different diameters.

Description

Technical Field

[0001] The present application relates to the field of mechanical grinding equipment, and in particular to a grinding machine head and a removable annular seam grinding equipment. Background Art

[0002] In the field of mechanical processing, especially for the grinding of annular welds of rotating workpieces, the existing technologies and equipment have made significant progress. These technologies not only improve production efficiency, but also improve product quality and safety. For example, in industries such as aerospace and automobile manufacturing, the quality of annular welds directly affects the performance and reliability of products. Therefore, efficient and accurate grinding of annular welds has become an important research topic.

[0003] In order to cope with circular welds of different diameters and curvatures, existing grinding equipment usually uses a fixed grinding head and manual adjustment. Specifically, commonly used methods include using a manually adjustable bracket to adjust the position of the grinding head, or using power devices such as cylinders and hydraulic systems to achieve the up, down, left and right movement of the grinding head. In addition, some equipment uses a rotating platform to achieve the grinding of circular welds by coordinating the fixed position of the grinding head through the rotation of the workpiece itself.

[0004] However, these methods have some limitations in practical applications. For example, when processing welds of different diameters and curvatures, frequent manual adjustments are often required, which not only increases the complexity and labor intensity of the operation, but also easily leads to low grinding accuracy. Especially in automated production lines, this manual adjustment method is difficult to achieve efficient continuous production, limiting the application scope and production efficiency of the equipment. Therefore, how to design a grinding device that can adapt to annular welds of different diameters has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In order to solve the problems existing in the background technology, the present application provides a grinding head and a movable annular seam grinding device.

[0006] In a first aspect, the present application provides a grinding head, which adopts the following technical solution:

[0007] A grinding machine head, comprising:

[0008] The housing has a connection end at one end and a movable end at the other end;

[0009] A driving pulley is rotatably disposed in the housing near the connection end;

[0010] The rotary sleeve is arranged in the same direction as the axis of the driving pulley and can be rotated and locked in place in the housing, near the movable end;

[0011] A plurality of supporting arms are arranged along the radial direction of the rotary sleeve and fixed to the circumference of the rotary sleeve in a centrally symmetrical manner;

[0012] A plurality of driven pulleys are arranged in the same axial direction as the driving pulley, the diameters of the driven pulleys are successively reduced, and the driven pulleys are rotatably connected to the outer end of the support arm, and the support arms are rotated with the rotating sleeve, so that the driven pulleys are successively protruded from the movable end of the housing;

[0013] The sanding belt is sleeved on the driving pulley and the outer side of the driven pulley which can at least protrude from the movable end of the casing.

[0014] By adopting the above technical solution, the grinding head can realize efficient and accurate grinding of annular welds of different diameters and shapes. The design of the drive pulley and the rotating sleeve in the housing enables the grinding head to flexibly adjust its position in multiple directions, ensuring that the abrasive belt always fits the workpiece surface, improving the grinding quality and efficiency. At the same time, the design of the multi-stage driven pulley not only increases the grinding range, but also improves the grinding accuracy, which is suitable for the grinding needs of annular seams under various complex working conditions.

[0015] Optionally, the support arm is a telescopic arm.

[0016] By adopting the above technical solution, the arm of the grinding head can be extended and retracted within a certain range, so as to adapt to workpieces of different diameters and improve the flexibility and application range of the equipment. Specifically, the design of the telescopic arm enables each driven pulley to be adjusted to the optimal position more accurately, ensuring that the sanding belt is in full contact with the workpiece surface, improving the grinding effect and efficiency. At the same time, the telescopic arm can also reduce the overall volume of the equipment, making it easier to transport and store.

[0017] Optionally, also include:

[0018] The sliding shaft is coaxially connected to the rotating sleeve and slides on the casing along its own axis.

[0019] A lock tooth ring, coaxially fixed to one end of the rotary sleeve;

[0020] The lock tooth plate is coaxially fixed to the sliding shaft, and the sliding shaft drives the lock tooth plate to move, so that the lock tooth plate can be engaged with the lock tooth ring one.

[0021] By adopting the above technical solution, the sliding shaft can slide along its own axis in the housing, and the locking sleeve can be locked at a specific position through the engagement of the locking tooth plate and the locking tooth ring, ensuring that the sanding belt head maintains a stable position during the grinding process, thereby improving the grinding accuracy and efficiency. At the same time, the sliding function of the sliding shaft allows the sanding belt head to flexibly adjust its position according to actual needs, adapt to workpieces of different sizes and shapes, and enhance the versatility and flexibility of the equipment.

[0022] Optionally, also include:

[0023] The second lock gear ring is coaxially fixed to the end of the rotary sleeve which is away from the first lock gear ring;

[0024] The movable toothed disc is coaxially connected to the sliding shaft, and can be engaged with the locking tooth ring 1 as the sliding shaft slides, and the locking tooth ring 1 is separated from the locking toothed disc;

[0025] The driven bevel gear is coaxially connected to the sliding shaft and fixed to the movable gear plate to drive the movable gear plate to rotate.

[0026] By adopting the above technical solution, the multi-level adjustment and locking function of the sanding belt machine head is realized, and the applicability and stability of the sanding belt machine head under different working conditions are improved. Specifically, the design of the lock gear ring 2 and the movable gear disc enables the sanding belt machine head to achieve precise positioning and stable locking at different working positions, avoiding the problem of reduced grinding accuracy caused by the displacement of the sanding belt machine head during the grinding process. At the same time, the linkage design of the driven bevel gear and the movable gear disc ensures smoother power transmission of the sanding belt machine head, further improving the grinding efficiency and quality.

[0027] Optionally, also include:

[0028] The driving bevel gear is coaxially fixed to one side of the driving pulley and rotates synchronously with the driving pulley;

[0029] A transmission rod, rotatably connected to the casing;

[0030] Bevel gear 1 is coaxially fixed to one end of the transmission rod and meshes with the driving bevel gear;

[0031] The second bevel gear is coaxially fixed to the other end of the transmission rod and slides along with the sliding shaft, so that the driven bevel gear can be engaged with or disengaged from the second bevel gear.

[0032] By adopting the above technical solution, the power transmission of the grinding head can be made more stable and accurate, ensuring that the sanding belt can still maintain good synchronization when rotating at high speed, thereby improving the grinding quality and efficiency. At the same time, through the engagement or disengagement of the bevel gear 2 and the driven bevel gear, the sanding belt can be quickly switched in the working state, enhancing the flexibility and adaptability of the equipment.

[0033] In the second aspect, the present application provides a removable annular seam grinding device, which adopts the following technical solution:

[0034] A removable annular seam grinding device comprises the grinding machine head.

[0035] By adopting the above technical solution, the removable annular seam grinding equipment can not only realize efficient and accurate grinding of annular welds of different diameters and curvatures, but also flexibly adjust the grinding position under different working conditions, ensuring the grinding quality while improving production efficiency. Specifically, through the design of the rotating sleeve and multiple arms in the casing, the grinding head can quickly replace different driven pulleys according to actual needs, so as to adapt to workpiece surfaces of different sizes and shapes, thereby improving the applicability and flexibility of the equipment. At the same time, the telescopic design of the arm further enhances the adjustment ability of the equipment, enabling it to better fit the workpiece surface and ensure the uniformity of the grinding effect.

[0036] Optionally, also include:

[0037] The receiving frame is set horizontally;

[0038] A chuck is coaxially rotatably connected to one end of the receiving frame and is used to connect with the processing end of the workpiece;

[0039] The rotating frame is arranged perpendicular to the receiving frame, and one end of the rotating frame is slidably connected along the receiving frame to connect the grinding machine head arranged on the rotating frame.

[0040] By adopting the above technical solution, the design of the receiving frame and the chuck enables the grinding head to be flexibly connected to different parts of the workpiece, ensuring the stability of the workpiece during the grinding process. The setting of the rotating frame and the receiving frame allows the grinding head to be accurately adjusted at different angles, enhancing the adaptability of the equipment. This ensures the smooth operation of the grinding head during the working process, further improving the grinding quality and efficiency.

[0041] Optionally, also include:

[0042] A support frame connected to an end of the receiving frame away from the chuck;

[0043] The passive gear ring is coaxially fixed to the receiving frame;

[0044] A servo motor is fixed to a support frame;

[0045] The driving gear is fixed to the output end of the servo motor and meshes with the passive gear ring.

[0046] By adopting the above technical solution, the support frame is fixed, the driving motor rotates, and the active gear and the passive gear ring rotate, so that the receiving frame can be driven to rotate in situ, thereby driving the grinding head to rotate around the workpiece through the rotating frame to complete the grinding of the workpiece, further improving the rotation accuracy and stability of the grinding head, thereby improving the grinding quality and efficiency.

[0047] Optionally, also include:

[0048] Magnetic seat, used for adsorption with the non-processing part of the workpiece;

[0049] A suspension frame is vertically and movably connected to the magnetic base;

[0050] The support frame is vertically connected to the lower side of the suspension.

[0051] By adopting the above technical solution, the non-processing part of the workpiece can be adsorbed through the magnetic seat, thereby achieving the fixation of the equipment to facilitate the processing of the workpiece.

[0052] In summary, the present application includes at least one of the following beneficial technical effects:

[0053] 1. The grinding head can realize efficient and accurate grinding of annular welds of different diameters and shapes. The design of the drive pulley and the rotating sleeve in the housing enables the grinding head to flexibly adjust its position in multiple directions, ensuring that the abrasive belt always fits the workpiece surface, improving the grinding quality and efficiency. At the same time, the design of the multi-stage driven pulley not only increases the grinding range, but also improves the grinding accuracy, which is suitable for the grinding needs of annular welds under various complex working conditions;

[0054] 2. The arm is a telescopic arm, which allows the arm of the grinding head to be retracted within a certain range, so as to adapt to workpieces of different diameters and improve the flexibility and applicability of the equipment. Specifically, the design of the telescopic arm allows each driven pulley to be adjusted to the optimal position more accurately, ensuring that the abrasive belt is in full contact with the workpiece surface, improving the grinding effect and efficiency. At the same time, the telescopic arm can also reduce the overall size of the equipment, making it easier to transport and store.

[0055] 3. The sliding shaft can slide along its own axis in the housing, and the locking sleeve can be locked at a specific position through the engagement of the locking tooth plate and the locking tooth ring, ensuring that the sanding belt head maintains a stable position during the grinding process, improving the grinding accuracy and efficiency. At the same time, the sliding function of the sliding shaft allows the sanding belt head to flexibly adjust its position according to actual needs, adapt to workpieces of different sizes and shapes, and enhance the versatility and flexibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of the structure of the abrasive belt in Example 1 of the present application;

[0057] Figure 2 is a schematic diagram of the sliding shaft structure in Example 1 of the present application;

[0058] Figure 3 It is a schematic diagram of a structure of a lock tooth ring in Example 1 of the present application;

[0059] Figure 4 It is a schematic diagram of the overall structure of Example 2 of the present application;

[0060] Figure 5 It is a schematic diagram of the passive gear ring of Example 2 of the present application.

[0061] Description of reference numerals: 1, housing; 11, opening;

[0062] 2. Driving shaft; 21. Driving pulley; 22. Servo motor; 23. Driving bevel gear;

[0063] 3. Sliding shaft; 31. Push cylinder; 32. Locking gear plate; 33. Moving gear plate; 34. Driven bevel gear;

[0064] 4. Rotating sleeve; 41. Locking gear ring 1; 42. Locking gear ring 2; 43. Support arm; 44. Driven pulley; 45. Abrasive belt;

[0065] 5. Transmission rod; 51. Bevel gear 1; 52. Bevel gear 2;

[0066] 6. Magnetic seat; 61. Stud; 62. Suspension; 63. Rotating sleeve; 64. Screw sleeve; 65. Slide; 66. Slide; 67. Screw 1;

[0067] 7. Support frame; 71. Undertaking frame; 72. Chuck; 73. Passive gear ring; 74. Driving motor; 75. Driving gear; 76. Rotating frame; 77. Screw rod 2. DETAILED DESCRIPTION

[0068] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0069] The inventor of the present application found that the sizes of the annular welds of different rotating workpieces are different, and the traditional weld grinding device cannot achieve adaptive grinding. Therefore, the present application mainly adopts a grinding head, which can achieve multi-gear grinding and adapt to the effect of annular welds of different diameters and curvatures. The present application is further described in detail below.

[0070] Example 1

[0071] Reference Figure 1 The grinding head provided in the embodiment of the present application includes a housing 1, one end of the housing 1 is a connection end, and the other end is a movable end. The movable end of the housing 1 is also provided with a clearance opening 11. A horizontally arranged driving shaft 2 is rotatably connected to a position near the connection end inside the housing 1, a driving pulley 21 is coaxially fixed on the driving shaft 2, and a servo motor 22 is fixed on the outside of the housing 1 for driving the driving shaft 2 to rotate.

[0072] Reference Figure 2-3The housing 1 is rotatably connected to a sliding shaft 3 near the movable end, and the axial direction of the sliding shaft 3 is the same as the axial direction of the driving shaft 2. A push cylinder 31 is fixed to the outside of the housing 1 for pushing the sliding shaft 3 to slide back and forth. A rotating sleeve 4 located in the housing 1 is coaxially sleeved on the sliding shaft 3, and the rotating sleeve 4 is rotatably connected to the sliding shaft 3. A locking tooth ring 1 41 is coaxially formed at one end of the rotating sleeve 4, and a locking tooth ring 2 42 is coaxially formed at the other end of the rotating sleeve 4.

[0073] A lock tooth plate 32 is coaxially fixed to one end of the sliding shaft 3 near the lock tooth ring 1 41, and the sliding shaft 3 drives the lock tooth plate 32 to move, so that the lock tooth plate 32 can mesh with the lock tooth ring 1 41. A movable tooth plate 33 is coaxially rotatably connected to one end of the sliding shaft 3 near the lock tooth ring 2 42, and the sliding shaft 3 drives the movable tooth plate 33 to move, so that the movable tooth plate 33 can mesh with the lock tooth ring 2 42. A driven bevel gear 34 is coaxially fixed to the side of the movable tooth plate 33 that is away from the lock tooth ring 2 42, and the driven bevel gear 34 is rotatably sleeved on the sliding shaft 3.

[0074] A driving bevel gear 23 is also coaxially fixed on the driving shaft 2. A transmission rod 5 is rotatably connected to the housing 1 along the extension direction of the machine head. A bevel gear 1 51 and a bevel gear 2 52 are coaxially fixed at both ends of the transmission rod 5. The bevel gear 1 51 is meshed with the driving bevel gear 23, and slides with the sliding shaft 3, so that the bevel gear 2 52 can be meshed with the driven bevel gear 34 or disengaged from the driven bevel gear 34.

[0075] Under normal circumstances, the sliding shaft 3 drives the lock tooth plate 32 to engage with the lock tooth ring 1 41, locking the rotating sleeve 4 so that it cannot rotate. When the sliding shaft 3 pushes the sliding shaft 3 to move, so that the lock tooth ring 1 41 and the lock tooth plate 32 are unlocked, and the lock tooth ring 2 42 is engaged with the movable tooth plate 33, the bevel gear 2 52 is engaged with the driven bevel gear 34 at the same time. That is, at this time, the driving shaft 2 rotates, which can drive the movable tooth plate 33 to rotate through the transmission rod 5, and then drive the rotating sleeve 4 to rotate.

[0076] A plurality of arms 43 are provided on the circumferential surface of the rotary sleeve 4 along its radial direction, and the plurality of arms 43 are fixed to the rotary sleeve 4 in a circumferential array, wherein the arms 43 may adopt telescopic cylinders. The outer end of each arm 43 is rotatably connected to a driven pulley 44 having the same axial direction as the driving pulley 21. The diameter of each driven pulley 44 increases successively, and as the rotary sleeve 4 rotates, each driven pulley 44 rotates successively to the movable end of the housing 1 and is located at the yielding opening 11 of the housing 1.

[0077] A sanding belt 45 is also provided in the casing 1. The sanding belt 45 is sleeved on the outside of the driving pulley 21 and the driven pulley 44 at the yielding opening 11 of the casing 1. At the same time, the sanding belt 45 is also sleeved on some other driven pulleys 44. At this time, the sanding belt 45 can be tensioned by extending and retracting the support arms 43 of the other driven pulleys 44.

[0078] During operation, unlock the rotary sleeve 4, rotate the rotary sleeve 4, and drive the driving pulley 21 to be located at the position of the yielding opening 11 of the housing 1 in sequence through each support arm 43, so that driving pulleys 21 of different diameters can be selected to be located at the processing end, and then lock the rotary sleeve 4. Since the diameters of the driving pulleys 21 are different, the change in the diameter of the driving pulley 21 will also cause the change in the grinding arc of the end of the sanding belt 45, ensuring that the sanding belt 45 always fits the surface of different workpieces, improving the grinding quality and efficiency, and increasing the grinding range. It is suitable for the grinding needs of annular seams under various complex working conditions.

[0079] The implementation principle of this embodiment is: when it is necessary to adjust the grinding radius of the abrasive belt 45 according to the workpiece, first, the sliding shaft 3 is driven to move by the push cylinder 31 to disengage the lock toothed disc 32 from the lock toothed ring 1 41, and the rotating sleeve 4 is in a free state. Then the sliding shaft 3 is continued to be pushed to drive the movable toothed disc 33 to engage with the lock toothed ring 2 42, and keep the lock toothed ring and the rotating sleeve 4 rotating synchronously. At the same time, the driven bevel gear 34 will also engage with the bevel gear 2 52, and the driven bevel gear 34 is coaxially fixed with the movable toothed disc 33. Therefore, the driven bevel gear 34 can drive the rotating sleeve 4 to rotate. In this state, the driving shaft 2 drives the driving pulley 21 to rotate, and the driving bevel gear 23 meshes with the bevel gear 1 51 to drive the transmission rod 5 to rotate, and then meshes with the driven bevel gear 34 through the bevel gear 2 52 to drive the rotating sleeve 4 to rotate, and different driven pulleys 44 can be driven to be located at the processing end of the casing 1 through the support arm 43, and then the driven pulley 44 is pushed to move through the support arm 43, so that the driven pulley 44 can be driven to be located at the yield opening 11 of the casing 1. As the driven pulleys 44 with different diameters are located at the processing end of the casing 1, the radius of the sanding belt 45 wrapped around the driven pulley 44 will also change, thereby meeting different processing requirements.

[0080] After the sanding belt 45 is adjusted, the above steps are performed in reverse order to make the sliding shaft 3 drive the movable toothed disc 33 to disengage from the locking tooth ring 2 42, and make the locking toothed disc 32 engage with the locking tooth ring 1 41, so as to lock the rotating sleeve 4 and prevent the rotating sleeve 4 from rotating. Then, the driving shaft 2 drives the driving pulley 21 to rotate, so as to drive the sanding belt 45 arranged on the outside of the driving pulley 21 and the driven pulley 44 to rotate, so as to grind the workpiece.

[0081] Example 2

[0082] A removable annular seam grinding device adopts the grinding head in Example 1.

[0083] Reference Figure 4-5Specifically, the grinding equipment includes a horizontally arranged magnetic base 6, and the magnetic base 6 is used to adsorb with the workpiece to fix the equipment. A stud 61 is vertically fixed on the magnetic base 6. A suspension 62 is horizontally fixed on one side of the stud 61, and a rotating sleeve 63 is fixed on one end of the suspension 62. The rotating sleeve 63 is coaxially connected with a screw sleeve 64, and the screw sleeve 64 is threadedly connected to the stud 61. A locking component 1 is provided between the rotating sleeve 63 and the stud 61 for locking the relative position of the rotating sleeve 63 and the stud 61. The locking component 1 can be a caliper or a tightening bolt. Rotating the screw sleeve 64 can drive the suspension 62 to move vertically, and then rotating the suspension 62 to adjust the angle. When the swing angle of the suspension 62 is completed, the position of the suspension 62 can be locked by the locking component 1.

[0084] A slide 65 is horizontally arranged below one end of the suspension 62 away from the stud 61, and a slide 66 is slidably connected to the slide 65 along its length direction, and a screw rod 1 67 is also rotatably connected to the slide 65 along its length direction, and the slide 66 is threadedly connected to the screw rod 1 67. Rotating the screw rod 1 67 can drive the slide 66 to slide horizontally.

[0085] The upper end of the slide 66 is horizontally rotatably connected to the suspension 62, and a locking component 2 is provided between the slide 66 and the suspension 62. The locking component 2 can be realized by a locking bolt or any other structure that can realize the mutual fixation of the two.

[0086] A support frame 7 is vertically fixed on the lower side of the slide 65, and a receiving frame 71 is horizontally arranged on the support frame 7. One end of the receiving frame 71 is rotatably connected to the support frame 7, and the other end is coaxially rotatably connected to a chuck 72. The chuck 72 is used to clamp with the processing end of the workpiece. In this way, the relative fixation of the workpiece and the equipment can be completed through the cooperation between the magnetic base 6 and the chuck 72.

[0087] A passive gear ring 73 is coaxially fixed to one end of the receiving frame 71 close to the supporting frame 7, and a driving motor 74 is also fixed to the side of the supporting frame 7 away from the passive gear ring 73. A driving gear is fixed to the output shaft of the driving motor 74, and the driving gear is meshed with the passive gear ring 73. A rotating frame 76 is provided on the receiving frame 71, and the rotating frame 76 is perpendicular to the receiving frame 71, and one end of the rotating frame 76 close to the receiving frame 71 slides along the axis direction of the receiving frame 71, and a screw rod 2 77 is rotatably connected to the supporting frame 7 along the axis direction, and the rotating frame 76 is threadedly connected to the screw rod 2 77, and driven by the screw rod 2 77, the rotating frame 76 can reciprocate along the axis direction of the receiving frame 71.

[0088] During operation, the position of the rotating frame 76 can be adjusted by rotating the screw rod 77, and then the driving motor 74 drives the driving gear to rotate, and through the engagement of the driving gear 75 and the passive gear ring 73, the rotating frame 76 can be driven to rotate around the receiving frame 71.

[0089] The grinding machine head is mounted on one end of the rotary frame 76 away from the receiving frame 71 .

[0090] The implementation principle of this embodiment is: during operation, the magnetic base 6 is adsorbed on the non-processing position of the workpiece, and then the screw sleeve 64 is rotated to drive the suspension 62 to move vertically, and then the screw rod 67 is rotated to drive the slide 65 to adjust the position until the chuck 72 is engaged with the processing end of the workpiece to complete the equipment adjustment.

[0091] The screw rod 77 is then used to drive the rotating frame 76 to adjust the distance, and finally the driving motor 74 drives the active gear 75 to rotate and mesh with the passive gear ring 73, thereby driving the receiving frame 71 to rotate, thereby driving the grinding machine head to rotate through the rotating frame 76 to complete the grinding of the workpiece.

[0092] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A grinding head, characterized in that: include: A housing (1) having one end as a connection end and the other end as a movable end; A driving pulley (21) is rotatably disposed in the housing (1) near the connection end; A rotary sleeve (4) is arranged in the same axial direction as the driving pulley (21) and is capable of rotating and locking in situ and is disposed in the housing (1) near the movable end; A plurality of supporting arms (43) are arranged along the radial direction of the rotating sleeve (4) and are fixed to the peripheral surface of the rotating sleeve (4) in a centrally symmetrical manner; A plurality of driven pulleys (44) are arranged in the same axial direction as the driving pulley (21), the diameters of the driven pulleys (44) are successively reduced, and the driven pulleys (44) are rotatably connected to the outer end of the support arm (43), and the support arms (43) are driven to rotate with the rotating sleeve (4), so that the driven pulleys (44) are successively protruded from the movable end of the housing (1); The sanding belt (45) is sleeved on the driving pulley (21) and the outer side of the driven pulley (44) which is at least able to protrude from the movable end of the housing (1).

2. The grinding head according to claim 1, characterized in that: The support arm (43) is a telescopic arm.

3. The grinding head according to claim 2, characterized in that: Also includes: The sliding shaft (3) is coaxially connected to the rotating sleeve (4) and slides along its own axis on the housing (1); A lock tooth ring (41) is coaxially fixed to one end of the rotary sleeve (4); The locking tooth plate (32) is coaxially fixed to the sliding shaft (3), and the sliding shaft (3) drives the locking tooth plate (32) to move, so that the locking tooth plate (32) can be meshed with the locking tooth ring (41).

4. The grinding head according to claim 3, characterized in that , also includes: The second locking tooth ring (42) is coaxially fixed to the end of the rotating sleeve (4) away from the first locking tooth ring (41); The movable toothed disc (33) is coaxially rotatably connected to the sliding shaft (3), and can be engaged with the locking toothed ring (41) as the sliding shaft (3) slides, and the locking toothed ring (41) is separated from the locking toothed disc (32); The driven bevel gear (34) is coaxially rotatably connected to the sliding shaft (3), fixed to the movable gear plate (33), and is used to drive the movable gear plate (33) to rotate.

5. The grinding head according to claim 4, characterized in that: Also includes: A driving bevel gear (23) is coaxially fixed to one side of the driving pulley (21) and rotates synchronously with the driving pulley (21); A transmission rod (5) is rotatably connected to the housing (1); A bevel gear 1 (51) is coaxially fixed to one end of the transmission rod (5) and meshes with the driving bevel gear (23); The second bevel gear (52) is coaxially fixed to the other end of the transmission rod (5) and slides along with the sliding shaft (3) to enable the driven bevel gear (34) to mesh with or disengage from the second bevel gear (52).

6. A removable annular seam grinding device, characterized in that: The invention comprises the grinding machine head as described in any one of claims 1 to 5.

7. The removable annular seam grinding device according to claim 6, characterized in that: Also includes: A receiving frame (71) is arranged horizontally; A chuck (72) is coaxially rotatably connected to one end of the receiving frame (71) and is used to be connected to the processing end of the workpiece; The rotating frame (76) is arranged perpendicular to the receiving frame (71), and one end of the rotating frame (76) is slidably connected along the receiving frame (71) to connect the grinding machine head and is arranged on the rotating frame (76).

8. The removable annular seam grinding device according to claim 7, characterized in that: Also includes: A support frame (7) connected to an end of the receiving frame (71) away from the chuck (72); A passive gear ring (73) is coaxially fixed to the receiving frame (71); A servo motor (22) is fixed to the support frame (7); The driving gear (75) is fixed to the output end of the servo motor (22) and meshes with the driven gear ring (73).

9. The removable annular seam grinding device according to claim 7, characterized in that: Also includes: A magnetic seat (6) for adsorbing the non-processing part of the workpiece; A suspension (62) vertically and movably connected to the magnetic base (6); The support frame (7) is vertically connected to the lower side of the suspension frame (62).

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