CN116871422A - Spinning work piece fixing device - Google Patents

Abstract

The invention discloses a spinning workpiece fixing device, which relates to the technical field of spinning equipment and comprises a guide sleeve, wherein one end of the guide sleeve is provided with a connecting flange, the other end of the guide sleeve is a clamping side, and the side wall of the guide sleeve is provided with a plurality of first guide grooves parallel to an axis; each first guide groove is provided with a clamping block, each clamping block is provided with a clamping part and a guide part, the clamping parts are positioned at the clamping sides, the clamping parts extend towards the radial direction of the end face of the guide sleeve, the guide parts are positioned in the first guide grooves, and the clamping sides extend towards the connecting flange; the driving column is arranged on the inner side of the guide sleeve and is coaxial with the guide sleeve, one end of the driving column is abutted with the guide part, and the other end of the driving column is connected with the first power device; the limiting device is arranged on the clamping side, so that the clamping part is positioned between the limiting device and the end face of the clamping side. The spinning workpiece fixing device can automatically clamp tubular materials, and after clamping, a spinning processing blind area does not exist, so that spinning procedures are reduced.

Description

Spinning work piece fixing device

Technical Field

The invention relates to the technical field of spinning equipment, in particular to a spinning workpiece fixing device.

Background

The spinning machine is characterized in that a specific core die is fixed on a main shaft of a machine tool, a clamp is fixed in front of the main shaft, a material of a workpiece to be processed is fixed on the clamp, the material is spun through a spinning roller pair moving on a lathe bed, and the material is formed between the spinning roller and the core die.

The existing spinning equipment has poor clamping performance on hollow tubular materials, after clamping the outer side wall of the materials, the clamping part cannot be subjected to spinning processing, so that the materials need to be subjected to secondary clamping and then to spinning of unprocessed parts, and the secondary clamping is difficult to ensure positioning accuracy.

In addition, the clamp generally uses a clamping jaw chuck of the same type as a lathe, and the clamping jaw distance needs to be manually locked and adjusted so as to clamp materials.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the spinning workpiece fixing device which can automatically clamp the tubular materials, has no spinning dead zone after clamping, and reduces spinning procedures.

According to an embodiment of the present invention, a spinning workpiece fixing device includes: the guide sleeve is provided with a connecting flange at one end and a clamping side at the other end, and a plurality of first guide grooves parallel to the axis are arranged on the side wall of the guide sleeve;

the clamping blocks are arranged at the first guide grooves, each clamping block is provided with a clamping part and a guide part, the clamping parts are positioned at the clamping sides and extend towards the radial direction of the end face of the guide sleeve, and the guide parts are positioned in the first guide grooves and extend towards the connecting flange from the clamping sides;

the driving column is arranged on the inner side of the guide sleeve and is coaxial with the guide sleeve, one end of the driving column is in butt joint with the guide part, the other end of the driving column is connected with a first power device, the driving column can be driven to move along the axial direction, and the guide part is extruded to enable the clamping block to drive the clamping part to move towards the outer side of the guide sleeve;

and the limiting device is arranged on the clamping side, so that the clamping part is positioned between the limiting device and the end face of the clamping side, and the clamping part is limited not to move along the axial direction of the guide sleeve.

The spinning workpiece fixing device provided by the embodiment of the invention has at least the following beneficial effects: the clamping block is limited to move in the first guide groove, so that the clamping block can only move in the plane of the radial direction of the section of the guide sleeve and cannot rotate around the axis of the guide sleeve; the first power device provides power for the driving column, so that the driving column moves along the axial direction of the driving column and can be abutted against and extruded with the guide part of the clamping block, so that the guide part positioned at the inner side of the guide sleeve is extruded and moved outwards, the clamping block is moved outwards of the guide sleeve, namely the clamping part moves towards the radial direction of the end surface of the guide sleeve, at the moment, the material sleeved on the clamping part is abutted against by the clamping part, and meanwhile, the clamping part expands outwards to clamp the inner side wall of the material, so that the automatic clamping of the material is realized; when the clamping part clamps the material at the inner side of the material, the spinning roller can completely cover the outer side wall of the material, and no spinning blind area exists.

According to some embodiments of the invention, a side of the guiding part, which is close to the inside of the guiding sleeve, is a guiding surface, the guiding surface forms an included angle with the axis of the guiding sleeve, and the guiding surface of the guiding part gradually expands outwards along the direction away from the clamping part, so that one end of the guiding part is positioned at the inner side of the guiding sleeve, the other end of the guiding part is positioned at the outer side of the guiding sleeve, and the driving column is abutted with the guiding surface of the guiding part.

According to some embodiments of the invention, the end of the driving post, which abuts against the guiding part, is provided with a contact slope, which is arranged around the circumference of the driving post, and which, in a section parallel to the axial direction of the driving post, is parallel to the guiding surface of the guiding part.

According to some embodiments of the invention, the outer side wall of the guide sleeve is further sleeved with an adjusting ring, the inner side wall of the adjusting ring is abutted against the outer side of the guide part, and a transmission assembly is connected to the adjusting ring, so that the adjusting ring can move along the axial direction of the guide sleeve and can press the guide part back to the inner side of the guide sleeve.

According to some embodiments of the invention, the transmission assembly comprises a plurality of first connecting rods, a plurality of second guide grooves parallel to the axis are formed in the side wall of the guide sleeve, each second guide groove is provided with one first connecting rod, one end of each first connecting rod is connected with the adjusting ring, and the other end of each first connecting rod is connected with the driving column.

According to some embodiments of the invention, the transmission assembly comprises a plurality of second connecting rods, a joint ring assembly and a second power device, the joint ring assembly is provided with an upper joint ring and a lower joint ring, the upper joint ring and the guide sleeve are coaxially arranged, the upper joint ring is circumferentially provided with a circle of clamping grooves, the lower joint ring is arranged in the clamping grooves and can move around the shaft along the circumferential direction, the upper joint ring is connected with the adjusting ring through the second connecting rods, and the lower joint ring is in transmission connection with the second power device so as to drive the lower joint ring to move along the axial direction of the guide sleeve.

According to some embodiments of the invention, the clamping groove is arranged on one surface of the upper connecting ring away from the guide sleeve, the cross section of the clamping groove is a T-shaped cross section, and the cross section of the lower connecting ring is correspondingly a T-shaped cross section, so that the lower connecting ring can be installed in the clamping groove.

According to some embodiments of the invention, the limiting device is a guide cover plate, the clamping side cover of the guide sleeve is provided with the guide cover plate, the guide cover plate and the end surface of the guide sleeve form a guide channel, and the guide channel is along the radial direction of the end surface of the guide sleeve, so that the clamping part of the clamping block is positioned in the guide channel to limit the clamping block from moving along the axial direction of the guide sleeve.

According to some embodiments of the invention, the guide cover plate comprises a base plate, a plurality of guide grooves are arranged on one surface of the base plate facing the guide sleeve, the guide grooves are located in the radial direction of the base plate and extend along the radial direction of the base plate, the plurality of guide grooves are distributed around the circumferential direction of the base plate, and the base plate is covered on the clamping side, so that the clamping part of each clamping block is located in one guide groove.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of a structure of a spin-on work piece fixture according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a fixture block installed in a first guide groove according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a spin-on workpiece fixture in accordance with an embodiment of the invention;

FIG. 4 is a schematic view of a adjusting ring according to an embodiment of the present invention;

FIG. 5 is a schematic view of a first connecting rod connected to an adjusting ring according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a second connecting rod, a ring assembly and a adjusting ring according to an embodiment of the present invention;

FIG. 7 is a schematic view of an installation structure of the upper and lower connection rings before the upper and lower connection rings are assembled in accordance with an embodiment of the present invention;

fig. 8 is a schematic structural view of a guide cover plate according to an embodiment of the present invention.

Reference numerals:

the guide sleeve 100, the connection flange 110, the clamping side 120, the first guide groove 130, the second guide groove 140, the clamping block 200, the clamping part 210, the guide part 220, the driving column 300, the contact inclined plane 310, the limiting device 400, the guide cover plate 410, the base plate 411, the guide groove 412, the adjusting ring 500, the transmission assembly 600, the first connection rod 610, the second connection rod 620, the connection ring assembly 630, the upper connection ring 631, the lower connection ring 632 and the clamping groove 633.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1, the spinning workpiece fixing device according to an embodiment of the present invention includes a guide sleeve 100, a clamping block 200, a driving post 300, and a limiting device 400;

the guide sleeve 100, one end of the guide sleeve 100 is provided with a connecting flange 110, the other end is provided with a clamping side 120, and the side wall of the guide sleeve 100 is provided with a plurality of first guide grooves 130 parallel to the axis;

the clamping block 200 is arranged at each first guide groove 130, the clamping block 200 is provided with a clamping part 210 and a guide part 220, the clamping part 210 is positioned at the clamping side 120, the clamping part 210 extends towards the radial direction of the end face of the guide sleeve 100, the guide part 220 is positioned in the first guide groove 130, and extends towards the connecting flange 110 from the clamping side 120;

the driving column 300 is arranged on the inner side of the guide sleeve 100 and is coaxial with the guide sleeve 100, one end of the driving column 300 is in butt joint with the guide part 220, the other end of the driving column 300 is connected with a first power device, the driving column 300 can be driven to move along the axial direction, and the guide part 220 is extruded to enable the clamping block 200 to drive the clamping part 210 to move towards the outer side of the guide sleeve 100;

the limiting device 400, the limiting device 400 is disposed on the clamping side 120 such that the clamping portion 210 is located between the limiting device 400 and an end surface of the clamping side 120 to limit the clamping portion 210 from moving in the axial direction of the guide sleeve 100.

The material is generally applied to spinning operation of hollow tubular materials. The first power device (not shown in the figure) can use hydraulic cylinder transmission to provide power for the driving column 300 to move, or use a motor to match with a gear rack (the driving column 300 is provided with transmission teeth along the axial direction) to provide power for the driving column 300, etc. The connecting flange 110 is used for connecting with a spindle of a spinning machine, and when the spindle rotates, the guiding sleeve 100 is driven to rotate around the axis, and simultaneously the clamped materials are driven to rotate together to finish spinning. The limiting device 400 is used for preventing the clamping portion 210 from moving along the axial direction of the guide sleeve 100, so as to prevent the clamping block 200 from being separated from the first guide groove 130 along the axial direction.

One end of the material is coaxially sleeved at the clamping side 120 of the guide sleeve 100, so that the clamping parts 210 of the clamping blocks 200 are all positioned in the material. The first power device makes the driving post 300 move towards the clamping side 120, the driving post 300 abuts against the guiding part 220 and moves continuously, so that the guiding part 220 moves towards the outer side of the guiding sleeve 100, namely the clamping block 200 moves towards the outer side of the guiding sleeve 100, the clamping part 210 moves along the radial direction of the end surface of the guiding sleeve 100 to expand, and the clamping part 210 abuts against the inner side wall of the material and realizes clamping. Just because the cartridge 200 is disposed in the first guide groove 130, when the driving post 300 presses the guide 220 of the cartridge 200, the cartridge 200 is restricted by the first guide groove 130 to move only in a radial plane of the guide housing 100 and to move to the outside of the guide housing 100.

It will be appreciated that the driving post 300 and the first power device may be independently fixed to the machine, and when the spinning operation is started, i.e. the guide sleeve 100 rotates around the shaft, the driving post 300 is located inside the guide sleeve 100, and there is relative rotation between the driving post 300 and the guide sleeve 100. Preferably, the driving post 300 and the first power device are disposed on the intermediate connection structure, and the intermediate connection structure is also in transmission connection with the spindle of the spinning machine, at this time, the spindle drives the guide sleeve 100, the driving post 300 and the first power device to rotate around the axis of the guide sleeve 100, so that the driving post 300 and the guide sleeve 100 do not rotate relatively, and rotational friction between the driving post 300 and the guide portion 220 of the fixture block 200 can be avoided.

After the spinning operation is finished, the driving post 300 is retracted and does not abut against the guiding portion 220 of the clamping block 200, and at this time, the clamping force of the clamping portion 210 on the inner side wall of the material is lost although the clamping portion 210 is not moved and retracted, so that the material can be removed from the clamping side 120.

Referring to fig. 2, it can be understood that a side of the guide portion 220 near the inside of the guide sleeve 100 is a guide surface, the guide surface forms an included angle with the axis of the guide sleeve 100, and the guide surface of the guide portion 220 gradually expands outwards along a direction away from the clamping portion 210, so that one end of the guide portion 220 is located at the inside of the guide sleeve 100, the other end is located at the outside of the guide sleeve 100, and the driving post 300 abuts against the guide surface of the guide portion 220.

The guiding surface is used for contacting with the driving post 300, along the direction away from the clamping part 210, the guiding surface of the guiding part 220 gradually expands outwards, when the driving post 300 moves towards the clamping part 210, the guiding part positioned at the inner side of the guiding sleeve 100 can be gradually extruded, so that the guiding part 220 is pushed towards the outer side of the guiding sleeve 100, and the clamping part 210 can expand the inner side wall of the clamped material.

Referring to fig. 2 and 3, it can be understood that one end of the driving post 300 for abutting against the guide part 220 is provided with a contact slope 310, the contact slope 310 is disposed around the circumference of the driving post 300, and in a section parallel to the axial direction of the driving post 300, the contact slope 310 is parallel to the guide surface of the guide part 220.

When the contact slope 310 is not provided, the contact portion between the driving post 300 and the guide portion 220 is in point contact, that is, the contact surface intersection point of the tip edge of the driving post 300 and the guide portion 220. At this time, the driving post 300 has a large stress when pressing the guide 220. After the contact inclined surface 310 is provided, the contact part of the contact inclined surface 310 and the guide part 220 is in line contact, namely, the intersection line of the curved surface and the plane, so that the contact part of the driving column 300 and the guide part 220 is increased, and under the condition that the forces are equal, the stress of the contact part is reduced, thereby prolonging the service life.

Referring to fig. 4, it can be understood that the outer sidewall of the guide sleeve 100 is further sleeved with an adjusting ring 500, and an inner sidewall of the adjusting ring 500 abuts against an outer side of the guide part 220, and a transmission assembly 600 is connected, so that the adjusting ring 500 can move along an axial direction of the guide sleeve 100 and can press the guide part 220 back to an inner side of the guide sleeve 100.

When the adjusting ring 500 is located at the outer side of the guide sleeve 100 and the adjusting ring 500 moves in a direction away from the clamping side 120, the guiding portion 220 located at the outer side of the guide sleeve 100 can be pressed back to the inner side of the guide sleeve 100, that is, the clamping block 200 is retracted inwards, the clamping portion 210 is retracted, the material is not clamped any more, and the material can be taken out from the clamping side 120. The transmission assembly 600 is used to drive the movement of the adjustment collar 500 to work in conjunction with the drive post 300. For example, when the driving post 300 moves toward the clamping side 120, the driving post 300 presses the guiding portion 220 in the guiding sleeve 100 to move outwards, and at this time, the transmission assembly 600 should also move toward the clamping side 120, so as to release the restriction on the guiding portion 220 outside the guiding sleeve 100, and realize clamping the material; when the driving post 300 moves away from the clamping side 120, the driving assembly 600 should also move away from the clamping side 120 to press the guide portion 220 outside the guide sleeve 100 to move inward, thereby releasing the clamping material.

Referring to fig. 5, it can be understood that the transmission assembly 600 includes a plurality of first connecting rods 610, a plurality of second guiding grooves 140 parallel to the axis are provided on the side wall of the guiding sleeve 100, each second guiding groove 140 is provided with a first connecting rod 610, one end of the first connecting rod 610 is connected with the adjusting ring 500, and the other end is connected with the driving post 300.

The first connecting rod 610 passes through the second guide groove 140, one end of the first connecting rod is connected with the adjusting ring 500, the other end of the first connecting rod is connected with the driving column 300, and when the driving column 300 moves, the adjusting ring 500 can be synchronously driven to move in the same direction, so that the requirement is met. When the driving column 300 moves towards the clamping side 120, the driving column 300 presses the guide part 220 in the guide sleeve 100 to move outwards, and at the moment, the first connecting rod 610 also drives the adjusting ring 500 to move towards the clamping side 120, so that the limitation on the guide part 220 outside the guide sleeve 100 is relieved, and the material is clamped; when the driving post 300 moves away from the clamping side 120, the first connecting rod 610 also drives the adjusting ring 500 to move away from the clamping side 120, so as to squeeze the guiding portion 220 outside the guiding sleeve 100 to move inwards, and release the clamped material. When the adjustment collar 500 is driven in this manner, the drive post 300 needs to be rotated around the axis in synchronization with the guide sleeve 100, so that the drive post 300 and the guide sleeve 100 are relatively stationary in the circumferential direction. Therefore, the driving post 300 and the first power device need to be arranged on the intermediate connecting structure, and the intermediate connecting structure is also in transmission connection with the main shaft of the spinning machine, and at the moment, the main shaft drives the guide sleeve 100, the driving post 300 and the first power device to rotate around the axis of the guide sleeve 100, so that relative rotation between the driving post 300 and the guide sleeve 100 can not occur.

Referring to fig. 6, it will be appreciated that the transmission assembly 600 includes a plurality of second connection rods 620, a collar assembly 630 and a second power device, the collar assembly 630 has an upper collar 631 and a lower collar 632, the upper collar 631 is coaxially disposed with the guide sleeve 100, the upper collar 631 is circumferentially provided with a ring of snap-in grooves 633, the lower collar 632 is disposed in the snap-in grooves 633 and is capable of moving around a shaft in the circumferential direction, the upper collar 631 is connected with the adjustment ring 500 through the second connection rods 620, and the lower collar 632 is in transmission connection with the second power device to drive the lower collar 632 to move in the axial direction of the guide sleeve 100.

The second power device (not shown in the figure) independently provides power for the adjusting ring 500 to drive the adjusting ring 500 to move along the axial direction of the guide sleeve 100, so as to realize the clamping release function of the clamping block 200. The coupling ring assembly 630 is used for contact rotation limitation, and when spinning is performed, the guide sleeve 100 is in a pivoting state, and if the adjusting ring 500 is to rotate along with the guide sleeve 100, i.e. the adjusting ring 500 and the guide sleeve 100 are in a relatively stationary state, then the upper coupling ring 631 and the lower coupling ring 632 are to rotate relatively. The lower joint ring 632 is disposed in the engagement groove 633 of the upper joint ring 631, and the lower joint ring 632 can be kept in an absolute stationary state when the upper joint ring 631, the guide bush 100, and the adjustment collar 500 are rotated. The second power device can also be driven by a hydraulic cylinder.

Specifically, the clamping groove 633 is disposed on a surface of the upper connecting ring 631 away from the guide sleeve 100, the cross section of the clamping groove 633 is a T-shaped cross section, and the cross section of the lower connecting ring 632 is correspondingly set to be a T-shaped cross section, so that the lower connecting ring 632 can be installed in the clamping groove 633.

Referring to fig. 7, the upper and lower coupling rings 631 and 632 may be formed in a semicircular manner or a multi-segment circular arc manner when assembled. Taking a semicircular splicing manner as an example, the end of a half of the lower joint ring 632 is inserted from one end of the clamping groove 633 of the upper joint ring 631, the lower joint ring 632 is continuously rotated such that the lower joint ring 632 is completely installed in the clamping groove 633, and then the two parts are spliced with each other to form the entire joint ring assembly 630. The splice can adopt a detachable fixed connection mode or can be connected in a welding mode.

It can be understood that the limiting device 400 is a guiding cover plate 410, the clamping side 120 of the guiding sleeve 100 is covered by the guiding cover plate 410, the guiding cover plate 410 and the end surface of the guiding sleeve 100 form a guiding channel, and the guiding channel is along the radial direction of the end surface of the guiding sleeve 100, so that the clamping portion 210 of the clamping block 200 is located in the guiding channel to limit the clamping block 200 from moving along the axial direction of the guiding sleeve 100.

As described in detail with reference to fig. 8, the guide cover 410 includes a base 411, a surface of the base 411 facing the guide sleeve 100 is provided with a plurality of guide grooves 412, the guide grooves 412 are located in a radial direction of the base 411 and extend along the radial direction of the base 411, the plurality of guide grooves 412 are distributed around a circumferential direction of the base 411, and the base 411 is covered on the clamping side 120, so that the clamping portion 210 of each clamping block 200 is located in one guide groove 412.

The clamping portion 210 of the clamping block 200 is located in the guide groove 412, and is limited to move only in the radial direction of the end surface of the guide sleeve 100, so as to avoid the clamping block 200 from being separated from the first guide groove 130 along the axial direction.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims (9)

1. A spinning workpiece fixture, comprising:

the guide sleeve (100), one end of the guide sleeve (100) is provided with a connecting flange (110), the other end is provided with a clamping side (120), and the side wall of the guide sleeve (100) is provided with a plurality of first guide grooves (130) parallel to the axis;

the clamping blocks (200) are arranged at the positions of the first guide grooves (130), the clamping blocks (200) are provided with clamping parts (210) and guide parts (220), the clamping parts (210) are positioned on the clamping sides (120), the clamping parts (210) extend towards the radial direction of the end faces of the guide sleeves (100), the guide parts (220) are positioned in the first guide grooves (130), and extend from the clamping sides (120) towards the connecting flanges (110);

the driving column (300) is arranged on the inner side of the guide sleeve (100) and is coaxial with the guide sleeve (100), one end of the driving column (300) is in butt joint with the guide part (220), the other end of the driving column is connected with a first power device, the driving column (300) can be driven to move along the axial direction, and the guide part (220) is extruded to enable the clamping block (200) to drive the clamping part (210) to move towards the outer side of the guide sleeve (100);

and the limiting device (400) is arranged on the clamping side (120), so that the clamping part (210) is positioned between the limiting device (400) and the end face of the clamping side (120) to limit the clamping part (210) from moving along the axial direction of the guide sleeve (100).

2. The spun work holding apparatus of claim 1, wherein: one side of the guide part (220) close to the inside of the guide sleeve (100) is a guide surface, the guide surface of the guide part is an included angle with the axis of the guide sleeve (100), and the guide surface of the guide part (220) gradually expands outwards along the direction away from the clamping part (210), so that one end of the guide part (220) is positioned at the inner side of the guide sleeve (100), the other end of the guide part is positioned at the outer side of the guide sleeve (100), and the driving column (300) is in butt joint with the guide surface of the guide part (220).

3. The spun work holding apparatus of claim 2, wherein: the drive column (300) is used for abutting one end of the guide part (220) and is provided with a contact inclined surface (310), the contact inclined surface (310) is arranged around the circumference of the drive column (300), and in a section parallel to the axial direction of the drive column (300), the contact inclined surface (310) is parallel to the guide surface of the guide part (220).

4. The spun work holding apparatus of claim 2, wherein: the outer side wall of uide bushing (100) still overlaps and is equipped with adjusting ring (500), the inside wall of adjusting ring (500) with the outside butt of guide part (220), and be connected with drive assembly (600), make adjusting ring (500) can follow the axial direction of uide bushing (100), and can with guide part (220) are pressed back the inboard of uide bushing (100).

5. The spun work holding apparatus of claim 4 wherein: the transmission assembly (600) comprises a plurality of first connecting rods (610), a plurality of second guide grooves (140) parallel to the axis are formed in the side wall of the guide sleeve (100), each second guide groove (140) is provided with one first connecting rod (610), one end of each first connecting rod (610) is connected with the adjusting ring (500), and the other end of each first connecting rod is connected with the driving column (300).

6. The spun work holding apparatus of claim 4 wherein: the transmission assembly (600) comprises a plurality of second connecting rods (620), a joint ring assembly (630) and a second power device, the joint ring assembly (630) is provided with an upper joint ring (631) and a lower joint ring (632), the upper joint ring (631) is coaxially arranged with the guide sleeve (100), a circle of clamping groove (633) is circumferentially arranged on the upper joint ring (631), the lower joint ring (632) is arranged in the clamping groove (633) and can move along a circumferential winding shaft, the upper joint ring (631) and the adjusting ring (500) are connected through the second connecting rods (620), and the lower joint ring (632) is in transmission connection with the second power device so as to drive the lower joint ring (632) to move along the axial direction of the guide sleeve (100).

7. The spun work holding apparatus of claim 6 wherein: the clamping groove (633) is formed in one surface, far away from the guide sleeve (100), of the upper connecting ring (631), the cross section of the clamping groove (633) is a T-shaped cross section, and the cross section of the lower connecting ring (632) is correspondingly formed into a T-shaped cross section, so that the lower connecting ring (632) can be installed in the clamping groove (633).

8. The spun work holding apparatus of claim 1, wherein: the limiting device (400) is a guide cover plate (410), the clamping side (120) of the guide sleeve (100) is covered by the guide cover plate (410), the guide cover plate (410) and the end face of the guide sleeve (100) form a guide channel, and the guide channel is along the radial direction of the end face of the guide sleeve (100), so that the clamping part (210) of the clamping block (200) is positioned in the guide channel, and the clamping block (200) is limited not to move along the axial direction of the guide sleeve (100).

9. The spun work holding apparatus of claim 8, wherein: the guide cover plate (410) comprises a base plate (411), a plurality of guide grooves (412) are formed in one face of the base plate (411) facing the guide sleeve (100), the guide grooves (412) are located in the radial direction of the base plate (411) and extend along the radial direction of the base plate, the guide grooves (412) are distributed around the circumference of the base plate (411), and the base plate (411) is covered on the clamping side (120) so that the clamping portions (210) of each clamping block (200) are located in one guide groove (412).