An adjustable ball mill

Abstract

The application relates to the technical field of cable processing, in particular to an adjustable spherical grinding machine which comprises a supporting mechanism and a grinding mechanism, the supporting mechanism is used for supporting and fixing a spherical workpiece and driving the spherical workpiece to rotate, the grinding mechanism is used for grinding the outer peripheral surface of the spherical workpiece, the spherical grinding machine further comprises a rotating driving source and a supporting seat, the rotating driving source is used for driving the supporting seat to rotate, and the supporting mechanism is slidably arranged on the supporting seat along the axial direction of the spherical workpiece. The cooperation of the supporting mechanism and the grinding mechanism can adapt to the grinding requirements of spherical workpieces with different sizes, the universality of the equipment is obviously improved, and the problem that the equipment needs to be frequently replaced due to the change of the workpiece size is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ball grinding, in particular to an adjustable ball grinding machine. BACKGROUND

[0002] The ball grinding machine is a high-precision equipment specially used for processing spherical workpieces (such as bearing balls, valve balls, precision instrument balls, etc.), and realizes the size precision, roundness and surface finish of the ball through the grinding process.

[0003] In the prior art, the ball grinding machine comprises a supporting mechanism and a grinding mechanism. The supporting mechanism is used for supporting and limiting the ball and driving the ball to rotate. The grinding mechanism comprises a grinding driving source and a grinding disc. The grinding driving source is used for driving the grinding disc to rotate, and the grinding disc is used for grinding the outer peripheral surface of the ball. However, the existing ball grinding machine is only suitable for a certain size of spherical workpiece. For different sizes of spherical workpieces, different ball grinding machines need to be replaced, and the applicability of the ball grinding machine is low. SUMMARY

[0004] In order to improve the applicability of the ball grinding machine, the present application provides an adjustable ball grinding machine.

[0005] The adjustable ball grinding machine provided by the present application adopts the following technical scheme:

[0006] The adjustable ball grinding machine comprises a supporting mechanism and a grinding mechanism. The supporting mechanism is used for supporting and fixing the spherical workpiece and driving the spherical workpiece to rotate. The grinding mechanism is used for grinding the outer peripheral surface of the spherical workpiece. The ball grinding machine further comprises a rotating driving source and a supporting seat. The rotating driving source is used for driving the supporting seat to rotate. The supporting mechanism is slidably arranged on the supporting seat along the axial direction of the spherical workpiece.

[0007] By adopting the above technical scheme, the rotating driving source is arranged to drive the supporting seat to rotate, and the supporting mechanism is slidably arranged. The multi-degree-of-freedom adjustment of the spherical workpiece during rotation is realized. The coordinated action of the supporting mechanism and the grinding mechanism can adapt to the grinding requirements of spherical workpieces of different sizes, significantly improve the universality of the equipment, and avoid the problem of frequent replacement of the equipment due to the change of the size of the workpiece.

[0008] Optionally, the ball grinding machine further comprises a sliding driving source and a sliding seat. The supporting mechanism is arranged on the sliding seat. The supporting mechanism comprises a rotating driving source and an expansion assembly. The rotating driving source is used for driving the expansion assembly to rotate. The expansion assembly is used for supporting and abutting the inner surface of the spherical workpiece. The sliding seat is provided with a sliding rail. The supporting seat is provided with a sliding groove for inserting and sliding the sliding rail. The sliding driving source is used for driving the sliding seat to slide on the supporting seat.

[0009] By adopting the technical scheme, the sliding seat is driven to slide along the sliding groove of the support seat by the sliding driving source, and the inflation assembly is in contact with the inner surface of the spherical workpiece, so that the workpiece can be stably rotated during grinding and the support position can be flexibly adjusted according to the size change, thereby improving the grinding precision and the workpiece clamping efficiency.

[0010] Optionally, the support mechanism further comprises an adjusting driving source and an auxiliary support assembly, the auxiliary support assembly is used to be in contact with the inflation assembly, the auxiliary support assembly is slidingly arranged on the sliding seat, and the adjusting driving source is used to drive the auxiliary support assembly to move.

[0011] By adopting the technical scheme, the adjusting driving source drives the auxiliary support assembly to move, the support assembly is in contact with the inflation assembly, the support stability of the inflation assembly is improved, the uniform support force on the inner wall of the workpiece is further enhanced, the workpiece is prevented from deviating or deforming due to uneven force during grinding, and the high-precision grinding effect is ensured.

[0012] Optionally, the inflation assembly comprises an inflation driving structure and a plurality of support rods, the plurality of support rods are arranged around the central axis of the spherical workpiece, the support rods are telescopic along the radial direction of the spherical workpiece, and the inflation driving structure is used to drive the support rods to telescope.

[0013] By adopting the technical scheme, the inflation driving structure drives the plurality of radial telescopic support rods to be in contact with the inner wall of the workpiece, the arrangement design of the support rods makes the force on the workpiece uniform, surface damage caused by local stress concentration is avoided, and the inflation assembly is suitable for spherical workpieces with different inner diameters.

[0014] Optionally, the inflation driving structure comprises a sliding rod, the sliding rod is slidingly arranged on the rotating driving source along the axial direction of the spherical workpiece, a driving slope is formed on the outer circumferential surface of the sliding rod, the distance between the driving slope and the central axis of the spherical workpiece decreases along the moving direction of the sliding rod, and the driving slope is used to be in contact with the support rod.

[0015] By adopting the technical scheme, the driving slope of the sliding rod cooperates with the support rod, the synchronous radial telescopic movement of the support rod is realized by the axial movement, the driving structure is simplified, the linear control precision of the adjustment is improved, and the telescopic amount of the inflation assembly is accurately matched with the size of the workpiece.

[0016] Optionally, the inflation driving structure further comprises a hand wheel and a rotating block arranged on the hand wheel, the hand wheel is rotationally arranged on the rotating driving source around the central axis of the spherical workpiece, a threaded hole is formed in the rotating block, and the sliding rod is threadedly connected with the rotating block.

[0017] By adopting the technical scheme, the threaded connection design of the hand wheel and the rotating block enables an operator to accurately adjust the axial position of the sliding rod by manually rotating the hand wheel, realizes stepless adjustment function, and balances operation convenience and adjustment accuracy, without the need to set a driving source, thereby saving energy consumption.

[0018] Optionally, the rotating driving source is a driving motor, an outer circumferential surface of an output shaft of the driving motor is provided with a plurality of sliding grooves distributed around a rotation axis of the output shaft of the driving motor, a locking block is slidingly arranged in the sliding groove, a locking elastic member is connected between the locking block and a groove bottom wall of the sliding groove, the locking elastic member is used to drive the locking block to pop out of the sliding groove, a locking hole into which the locking block is inserted is formed in the hand wheel, a recovery slope is formed on the locking block, and a hole wall of the locking hole is used to slidingly abut against the recovery slope to press the locking block back into the sliding groove.

[0019] By adopting the technical scheme, the sliding groove, the locking block and the locking elastic member on the output shaft of the driving motor are matched with the locking hole of the hand wheel, thereby realizing quick locking and unlocking of the hand wheel and the output shaft of the driving motor, facilitating quick fixing of the position of the hand wheel before the equipment is operated, preventing accidental rotation of the hand wheel during the grinding process, and improving the safety of the equipment.

[0020] Optionally, the unlocking ring is further provided, the unlocking ring is rotationally arranged on the output shaft of the driving motor, the unlocking ring is located on a side of the hand wheel close to the rotation axis of the output shaft of the driving motor, a plurality of insertion holes corresponding to the locking blocks one by one are formed in the unlocking ring, the insertion holes are used to insert the locking blocks, an installation groove is formed in the outer circumferential surface of the output shaft of the driving motor, a clamping block is slidingly arranged in the installation groove, a locking elastic member is connected between the clamping block and a groove bottom wall of the installation groove, the locking elastic member is used to drive the clamping block to pop out of the installation groove, a locking hole and an unlocking hole into which the clamping block is inserted are formed in the unlocking ring, the locking hole and the unlocking hole are distributed around a central axis of the unlocking ring, when the clamping block is inserted into the locking hole, the locking block is inserted into the insertion hole, and when the clamping block is inserted into the unlocking hole, the locking block exits the insertion hole and is pressed back into the sliding groove by an inner wall surface of the unlocking ring.

[0021] By adopting the technical scheme, the unlocking ring is matched with the clamping block and the locking hole, the position of the clamping block is switched by rotating the unlocking ring, the insertion or exit operation of the locking block can be completed by one key, when the spherical workpiece is machined, the clamping block is inserted into the locking hole, the hand wheel is rotated in the forward direction, the internal part of the spherical workpiece is stably supported by the supporting rod, after the spherical workpiece is machined, the hand wheel needs to be reversed to drive the supporting rod to shrink, at this time, the clamping block is pressed to exit the locking hole, the clamping block is inserted into the unlocking hole by rotating the unlocking ring, the locking block is pressed back into the sliding groove by the unlocking ring, and the hand wheel can be smoothly reversed, thereby improving operation convenience.

[0022] Optionally, a support block is provided at the end of the support rod, and a buffer elastic element is connected between the support block and the support rod. The buffer elastic element is used to drive the support block to press against the inner wall of the spherical workpiece.

[0023] By adopting the above technical solution, the buffer elastic element at the end of the support rod provides flexible buffer force for the support block, so that the support block automatically adapts to small deformations when it contacts the inner wall of the workpiece, reducing the risk of scratches on the workpiece surface caused by rigid impact, while ensuring uniform distribution of support force.

[0024] Optionally, the support block is provided with an elastic buffer pad at the end away from the support rod.

[0025] By adopting the above technical solution, the elastic buffer pad at the end of the support block further absorbs the vibration during the grinding process, reduces the friction noise between the workpiece and the support mechanism, and prevents indentations on the inner wall of the workpiece caused by direct contact with hard materials, thereby improving the surface finish of the finished product.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The synergistic effect of the support mechanism and the grinding mechanism can adapt to the grinding needs of spherical workpieces of different sizes, significantly improving the versatility of the equipment and avoiding the problem of frequent equipment replacement due to changes in workpiece size;

[0028] 2. The threaded connection design between the handwheel and the rotating block enables stepless adjustment, balancing ease of operation and adjustment accuracy. No drive source is required, saving energy.

[0029] 3. The unlocking ring design allows the handwheel to be reversed smoothly, improving ease of operation. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0031] Figure 2 This is a schematic diagram of the structure of the rotation drive source highlighted in Embodiment 1 of this application.

[0032] Figure 3 This is a schematic diagram of the structure of the expansion component in Embodiment 2 of this application.

[0033] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0034] Figure 5 This is a cross-sectional view of the handwheel, unlocking ring, and output shaft of the drive motor in Embodiment 2 of this application.

[0035] Figure 6 This is a cross-sectional view of the unlocking ring and the output shaft of the drive motor in Embodiment 2 of this application.

[0036] Figure 7 This is a top view of the drive motor and unlocking ring in Embodiment 2 of this application.

[0037] Figure 8 This is a cross-sectional view of the sliding rod and the extension rod in Embodiment 2 of this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Support mechanism; 11. Rotary drive source; 111. Drive motor; 112. Sliding groove; 113. Mounting groove; 12. Expansion assembly; 121. Expansion drive structure; 122. Support rod; 123. Sliding rod; 124. Drive inclined surface; 125. Handwheel; 126. Rotating block; 127. Locking hole; 128. Guide groove; 13. Adjustment drive source; 14. Auxiliary support assembly; 141. Rotary motor; 142. Top rod; 2. Grinding mechanism; 3. Rotary drive 4. Source; 5. Support base; 6. Slide groove; 7. Sliding drive source; 8. Slide seat; 9. Slide rail; 10. Locking block; 11. Retraction ramp; 12. Locking elastic element; 13. Unlocking ring; 14. Insertion hole; 15. Locking hole; 16. Unlocking hole; 17. Locking block; 18. Locking elastic element; 19. Support block; 20. Buffer elastic element; 21. Buffer pad; 22. Base; 33. Extension rod; 44. Guide block; 55. Connecting plate; 66. Sleeve; 77. Reset elastic element. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0040] Example 1:

[0041] Embodiment 1 of this application discloses an adjustable ball grinding machine. (Refer to...) Figure 1 The adjustable spherical grinding machine includes a support mechanism 1 and a grinding mechanism 2. The support mechanism 1 is used to support and fix the spherical workpiece and drive the spherical workpiece to rotate. The grinding mechanism 2 is used to grind the outer circumferential surface of the spherical workpiece. The support mechanism 1 can rotate relative to the grinding mechanism 2, and the support mechanism 1 can also move relative to the grinding mechanism 2.

[0042] Reference Figure 1 and Figure 2 The adjustable ball grinder also includes a base 105, a rotation drive source 3, and a support base 4. The rotation drive source 3 is disposed in the inner cavity of the base 105. The support base 4 is rotatably mounted on the base 105 via a bearing assembly, and the base 105 provides rotational support for the support base 4. The rotation drive source 3 is a motor, and the output shaft of the rotation drive source 3 is fixedly connected to the support base 4. The rotation drive source 3 is used to drive the support base 4 to rotate.

[0043] Reference Figure 2The adjustable ball grinder further comprises a sliding driving source 5 and a sliding seat 6, the sliding driving source 5 is used for driving the sliding seat 6 to slide on the support seat 4, and the support mechanism 1 is fixedly installed on the sliding seat 6. Two sliding rails 61 are fixedly installed on the bottom surface of the sliding seat 6, two sliding grooves 41 corresponding to the sliding rails 61 are formed on the upper surface of the support seat 4, the sliding rails 61 are slidingly installed in the sliding grooves 41, and the sliding grooves 41 and the sliding rails 61 extend in a direction parallel to the axial direction of the spherical workpiece. The sliding driving source 5 is fixedly installed on the support seat 4, the sliding driving source 5 is a gas cylinder, and a driving shaft of the sliding driving source 5 is fixedly connected with the sliding seat 6.

[0044] With reference to Figure 2 The support mechanism 1 comprises a rotating driving source 11 and an expansion assembly 12, the rotating driving source 11 is fixedly installed on the sliding seat 6, the rotating driving source 11 is a motor, and the expansion assembly 12 is fixedly connected with an output shaft of the rotating driving source 11. The expansion assembly 12 is used for expansion and contraction to limit and support the inner wall of the spherical workpiece, so as to drive the spherical workpiece to move.

[0045] With reference to Figure 2 The support mechanism 1 further comprises an adjusting driving source 13 and an auxiliary support assembly 14, the auxiliary support assembly 14 is slidingly installed on the sliding seat 6, and the adjusting driving source 13 is used for driving the auxiliary support assembly 14 to slide. The auxiliary support assembly 14 comprises a rotating motor 141 and a jacking rod 142, the adjusting driving source 13 is a gas cylinder, and a driving shaft of the adjusting driving source 13 is fixedly connected with a motor base of the rotating motor 141. The jacking rod 142 is fixedly connected with an output shaft of the rotating motor 141, and the rotating motor 141 drives the jacking rod 142 to rotate, so that an end portion of the jacking rod 142 away from the rotating motor 141 abuts against the expansion assembly 12.

[0046] In other embodiments, the expansion assembly 12 and the auxiliary support assembly 14 can be driven to move synchronously through a screw nut mechanism.

[0047] The implementation principle of the adjustable ball grinder provided in the embodiment of the application is as follows: first, the expansion assembly 12 is started to limit and fix the inner wall of the spherical workpiece, then the sliding driving source 5 is started to drive the sliding seat 6 to move, so that the spherical workpiece is moved to a position aligned with the grinding mechanism 2, the adjusting driving source 13 is started to drive the auxiliary support assembly 14 to move until the jacking rod 142 abuts against the expansion assembly 12. The rotating driving source 11 and the rotating motor 141 are started to drive the spherical workpiece to rotate, and then the grinding mechanism 2 is started to grind the spherical workpiece, while the rotating driving source 3 is started to drive the spherical workpiece to rotate, so that the outer peripheral surface of the spherical workpiece can be fully and uniformly ground.

[0048] The embodiment drives the support seat 4 to rotate by setting the rotating driving source 3, and cooperates with the support mechanism 1 arranged in sliding mode, so that the multi-freedom adjustment of the spherical workpiece in the rotating process is realized. The support mechanism 1 cooperates with the grinding mechanism 2 to adapt to the grinding requirements of spherical workpieces of different sizes, significantly improves the versatility of the equipment, and avoids the problem of frequent replacement of the equipment due to the change of the size of the workpiece.

[0049] Embodiment 2

[0050] With reference to Figure 3 Unlike embodiment 1, in the embodiment, the expansion assembly 12 includes an expansion driving structure 121 and a plurality of support rods 122, the expansion driving structure 121 is used to drive the support rods 122 to extend and retract. The support rods 122 are arranged around the central axis of the spherical workpiece, and extend along the radial direction of the spherical workpiece and are retractable.

[0051] With reference to Figure 3 With Figure 4 , the rotating driving source 11 is a driving motor 111, the expansion driving structure 121 includes a hand wheel 125, a rotating block 126 and a sliding rod 123, the hand wheel 125 is rotatably installed on the output shaft of the driving motor 111, and the sliding rod 123 is slidably installed on the output shaft of the driving motor 111. The hand wheel 125 is fixedly connected with the rotating block 126, a threaded hole extending along the axial direction of the output shaft of the driving motor 111 is formed in the rotating block 126, the sliding rod 123 is threadedly connected with the rotating block 126, and the sliding rod 123 is slidably installed in the threaded hole of the rotating block 126.

[0052] With reference to Figure 5 A plurality of sliding grooves 112 are formed in the outer circumferential surface of the output shaft of the driving motor 111, the plurality of sliding grooves 112 are arranged around the axial direction of the output shaft of the driving motor 111, a locking block 7 is slidably installed in the sliding groove 112, a locking elastic element 8 is press-fitted between the locking block 7 and the groove bottom wall of the sliding groove 112, and the locking elastic element 8 is retractable in the direction of ejecting the locking block 7 out of the sliding groove 112.

[0053] With reference to Figure 5 A locking hole 127 is formed in the hand wheel 125 and is used for inserting the locking block 7. A recovery inclined surface 71 is formed on the end of the locking block 7, and the hole wall of the locking hole 127 is used to slide against the recovery inclined surface 71 to press the locking block 7 back into the sliding groove 112. For example, the clockwise rotation of the hand wheel 125 is positive rotation, and the recovery inclined surface 71 is inclined to the right side away from the groove bottom wall of the sliding groove 112.

[0054] With reference to Figure 5The adjustable ball grinder further comprises an unlocking ring 9 which is rotatably installed on the output shaft of the driving motor 111 and is located radially between the output shaft of the driving motor 111 and the hand wheel 125. A plurality of insertion holes 91 corresponding to the locking blocks 7 are formed through the unlocking ring 9, and the insertion holes 91 are for the locking blocks 7 to be inserted through.

[0055] With reference to Figure 6 , an installation groove 113 is formed on the outer circumferential surface of the output shaft of the driving motor 111, a clamping block 100 is slidably installed in the installation groove 113, a locking elastic member 101 is press-fitted between the clamping block 100 and the groove bottom wall of the installation groove 113, and the locking elastic member 101 is stretchable and contractible in the direction of ejecting the clamping block 100 out of the installation groove 113. A locking hole 92 and an unlocking hole 93 for the clamping block 100 to be inserted are formed on the unlocking ring 9, and the locking hole 92 and the unlocking hole 93 are arranged around the central axis of the unlocking ring 9.

[0056] With reference to Figure 5 and Figure 6 and Figure 7 , it is assumed that the clockwise rotation of the hand wheel 125 is forward rotation, and the arrangement direction of the unlocking hole 93 and the locking hole 92 is clockwise. The width between the unlocking hole 93 and the locking hole 92 and the total spacing are less than or equal to the width of the locking hole 127 and the total spacing between the locking hole 127 and the adjacent locking hole 127. When the clamping block 100 is inserted into the locking hole 92, the locking block 7 is inserted into the insertion hole 91, and when the clamping block 100 is inserted into the unlocking hole 93, the locking block 7 is withdrawn from the insertion hole 91 and is pressed back into the sliding groove 112 by the inner wall surface of the unlocking ring 9.

[0057] With reference to Figure 4 and Figure 8 , the output shaft of the driving motor 111 is fixedly connected with an extension rod 106, and the sliding rod 123 is sleeved on the extension rod 106. The extension rod 106 is integrally formed with a guide block 107, and the inner wall of the sliding rod 123 is formed with a guide groove 128 extending in the axial direction of the output shaft of the driving motor 111, and the guide groove 128 is for the guide block 107 to be inserted, so as to guide the sliding of the sliding rod 123 and prevent the sliding rod 123 from rotating. The rotation of the hand wheel 125 drives the rotation of the rotating block 126, thereby driving the sliding of the sliding rod 123.

[0058] In other embodiments, the hand wheel 125 and the rotating block 126 can not be provided, and the sliding rod 123 can be driven to move by an electric push rod, a gas cylinder or an oil cylinder.

[0059] With reference to Figure 4The outer circumferential surface of the sliding rod 123 is formed with a driving slope 124, the distance between the driving slope 124 and the central axis of the output shaft of the driving motor 111 decreases along the moving direction of the sliding rod 123, and the driving slope 124 is used to abut against the supporting rod 122. In the embodiment, the end of the sliding rod 123 away from the output shaft of the driving motor 111 is in the shape of a truncated cone, and the driving slope 124 is formed on the outer surface of the end.

[0060] With reference to Figure 4 The end of the extension rod 106 away from the output shaft of the driving motor 111 is fixedly connected with a connecting disc 108, the connecting disc 108 is fixedly connected with a plurality of sets of sleeves 109 corresponding to the supporting rods 122 one by one, the sleeves 109 are sleeved on the supporting rods 122, and the supporting rods 122 are slidingly installed in the sleeves 109. The supporting rods 122 are connected with reset elastic members 110, the reset elastic members 110 are used to drive the supporting rods 122 to reset to the retracted state, so that the supporting rods 122 are separated from the inner wall of the spherical workpiece. The length of the supporting rods 122 is adjustable, so as to be suitable for spherical workpieces of different sizes.

[0061] With reference to Figure 4 The end of the supporting rod 122 away from the sliding rod 123 is connected with a supporting block 102, the supporting block 102 is connected with buffer elastic members 103 between the supporting block 102 and the supporting rod 122, the buffer elastic members 103 are compression springs, and the buffer elastic members 103 are used to drive the supporting block 102 to abut against the inner wall of the spherical workpiece. The surface of the supporting block 102 close to the inner wall of the spherical workpiece is formed with a curved surface, which is used to improve the adaptability to the inner wall surface of the spherical workpiece. The curved surface of the supporting block 102 is fixedly connected with a buffer pad 104, and the buffer pad 104 is a sponge pad or a rubber pad.

[0062] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, so that: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An adjustable ball lapping machine, comprising a supporting mechanism (1) for supporting and rotating a spherical workpiece and a lapping mechanism (2) for lapping the outer circumferential surface of the spherical workpiece, characterized in that: The support mechanism (1) further comprises a rotating driving source (3) and a support base (4), the rotating driving source (3) is used to drive the support base (4) to rotate, and the support mechanism (1) is arranged on the support base (4) in the axial sliding mode of the spherical workpiece; the support mechanism (1) further comprises a sliding driving source (5) and a sliding base (6), the support mechanism (1) is arranged on the sliding base (6), and the support mechanism (1) comprises a rotating driving source (11) and an expansion assembly (12), the rotating driving source (11) is used to drive the expansion assembly (12) to rotate, the expansion assembly (12) is used to support the inner surface of the spherical workpiece, the sliding base (6) is provided with a sliding rail (61), the support base (4) is provided with a sliding groove (41) into which the sliding rail (61) is inserted and slides, and the sliding driving source (5) is used to drive the sliding base (6) to slide on the support base (4); the expansion assembly (12) comprises an expansion driving structure (121) and a plurality of support rods (122), the plurality of support rods (122) are arranged around the central axis of the spherical workpiece, the support rods (122) are telescopic in the radial direction of the spherical workpiece, and the expansion driving structure (121) is used to drive the support rods (122) to be telescopic; the expansion driving structure (121) comprises a sliding rod (123), the sliding rod (123) is arranged on the rotating driving source (11) in the axial sliding mode of the spherical workpiece, a driving slope (124) is formed on the outer circumferential surface of the sliding rod (123), the distance between the driving slope (124) and the central axis of the spherical workpiece decreases in the moving direction of the sliding rod (123), and the driving slope (124) is used to abut against the support rods (122); the expansion driving structure (121) further comprises a hand wheel (125) and a rotating block (126) arranged on the hand wheel (125), the hand wheel (125) is arranged on the rotating driving source (11) in the rotating mode around the central axis of the spherical workpiece, a threaded hole is formed in the rotating block (126), and the sliding rod (123) and the rotating block (126) are in threaded connection.

2. The adjustable ball mill of claim 1, wherein: The support mechanism (1) further comprises an adjusting driving source (13) and an auxiliary support assembly (14), the auxiliary support assembly (14) is used to abut against the expansion assembly (12), the auxiliary support assembly (14) is arranged on the sliding base (6) in the sliding mode, and the adjusting driving source (13) is used to drive the auxiliary support assembly (14) to move.

3. The adjustable ball mill of claim 1, wherein: The rotating driving source (11) is a driving motor (111), a plurality of sliding grooves (112) are arranged on the outer circumferential surface of the output shaft of the driving motor (111), the plurality of sliding grooves (112) are distributed around the rotation axis of the output shaft of the driving motor (111), a locking block (7) is slidably arranged in the sliding groove (112), a locking elastic element (8) is connected between the locking block (7) and the groove bottom wall of the sliding groove (112), the locking elastic element (8) is used for driving the locking block (7) to pop out of the sliding groove (112), a locking hole (127) is arranged on the hand wheel (125) for inserting the locking block (7), a recovery slope (71) is formed on the locking block (7), and the hole wall of the locking hole (127) is used for slidingly abutting against the recovery slope (71) to press the locking block (7) back into the sliding groove (112).

4. The adjustable ball mill of claim 3, wherein: Further comprising an unlocking ring (9), the unlocking ring (9) is rotatably arranged on the output shaft of the driving motor (111), the unlocking ring (9) is located on the side of the hand wheel (125) close to the rotation axis of the output shaft of the driving motor (111), a plurality of insertion holes (91) corresponding to the locking blocks (7) are arranged on the unlocking ring (9), the insertion holes (91) are used for inserting the locking blocks (7), a mounting groove (113) is arranged on the outer circumferential surface of the output shaft of the driving motor (111), a clamping block (100) is slidably arranged in the mounting groove (113), a locking elastic element (101) is connected between the clamping block (100) and the groove bottom wall of the mounting groove (113), the locking elastic element (101) is used for driving the clamping block (100) to pop out of the mounting groove (113), a locking hole (92) and an unlocking hole (93) are arranged on the unlocking ring (9) for inserting the clamping block (100), the locking hole (92) and the unlocking hole (93) are distributed around the central axis of the unlocking ring (9), when the clamping block (100) is inserted into the locking hole (92), the locking block (7) is inserted into the insertion hole (91), and when the clamping block (100) is inserted into the unlocking hole (93), the locking block (7) exits the insertion hole (91) and is pressed back into the sliding groove (112) by the inner wall surface of the unlocking ring (9).

5. The adjustable ball mill of claim 1, wherein: The end of the supporting rod (122) is provided with a supporting block (102), a buffer elastic element (103) is connected between the supporting block (102) and the supporting rod (122), and the buffer elastic element (103) is used for driving the supporting block (102) to press and abut against the inner wall of the spherical workpiece.

6. The adjustable ball mill of claim 5, wherein: The end of the supporting block (102) away from the supporting rod (122) is provided with a buffer pad (104) having elasticity.

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