Quick alignment device for lathe

Abstract

The invention discloses a lathe rapid alignment device which comprises a mounting frame and a ring body assembly, the ring body assembly comprises a first ring body and a second ring body which are coaxial, the first ring body is vertically mounted on the mounting frame, the second ring body is rotatably arranged, a clamping alignment mechanism is arranged on the ring body assembly, and the clamping alignment mechanism is arranged on the mounting frame. The clamping alignment mechanism comprises more than three clamping jaws, and the more than three clamping jaws are evenly arranged and distributed in the circumferential direction of the ring body assembly. According to the quick alignment device for the lathe, the more than three clamping jaws are distributed in the circumferential direction, multi-point alignment is carried out on a workpiece, multiple times of alignment can be achieved when the workpiece rotates by a circle, the alignment speed is high, and the alignment efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of lathe processing equipment, and in particular to a rapid alignment device for a lathe. Background Art

[0002] After the workpiece is initially processed by the lathe, before semi-finishing and finishing, the workpiece installed on the lathe needs to be aligned, that is, the position of the workpiece axis needs to be adjusted to improve the coaxiality of the clamped workpiece and the lathe spindle. This is the condition for achieving finishing and to ensure the final processing accuracy of the workpiece. In the current lathe processing process, after the workpiece is clamped on the lathe, it is mainly aligned by a dial indicator. Specifically, the dial indicator stand is installed on the side of the workpiece, touching the workpiece, and then the workpiece is rotated to observe the value of the dial indicator until the dial indicator value changes slightly and the coaxiality of the workpiece and the lathe spindle is high. Then the workpiece is clamped to complete the alignment. When the dial indicator is aligned, although the alignment accuracy is high, the dial indicator stand is cumbersome and time-consuming, and the alignment efficiency is low. Especially when the amount of workpieces is large, the cumbersome alignment operation of the dial indicator seriously affects the entire processing progress, which is not conducive to mass production. In addition, when the workpiece deviation is large, the large swing of the workpiece is also very likely to cause damage to the dial indicator. Summary of the invention

[0003] The purpose of the present invention is to provide a rapid alignment device for a lathe.

[0004] The technical solution to achieve the purpose of the present invention is: a lathe rapid alignment device, including a mounting frame and a ring body assembly, the ring body assembly includes a coaxial first ring body and a second ring body, the first ring body is vertically mounted on the mounting frame, the second ring body is rotatably arranged, the ring body assembly is provided with a clamping alignment mechanism, the clamping alignment mechanism includes more than three clamping jaws, and the more than three clamping jaws are evenly arranged and distributed along the circumference of the ring body assembly; each of the clamping jaws includes a swing arm, a limit pin and a roller, the swing arm is hingedly mounted on the first ring body through a pin shaft, the pin shaft is parallel to the axial direction of the ring body assembly, and the swing arm is provided with a There is a first strip hole, the length direction of the first strip hole is consistent with the length direction of the swing arm, the limit pin is fixedly installed on the second ring body, the limit pin extends into the first strip hole, the roller is rotatably installed on one end of the swing arm close to the center of the ring body assembly, the roller protrudes outside the swing arm, the pin shaft, the limit pin and the roller are all located at different positions of the swing arm; a clamping space is formed between the rollers of all the clamping jaws in the clamping and alignment mechanism; one end of a tension spring is connected to the mounting frame and the other end is connected to the second ring body, and the tension spring has a pre-tightening force to close the clamping space.

[0005] Furthermore, the second ring body can be rotatably mounted on the first ring body. The second ring body can be rotatably mounted on the mounting frame, or can be rotatably mounted on the first ring body. Compared with the former, the latter can improve the integration of the second ring body and the first ring body after the second ring body can be rotatably mounted on the first ring body, so that the matching setting of the swing arm and the limit pin in the clamp is more convenient; on the other hand, the mounting frame does not need to be complicatedly set for the installation of the second ring body, and the whole structure is relatively simpler.

[0006] Furthermore, the inner diameter of the second ring body is smaller than that of the first ring body, and the pin shaft and the roller in the clamp are respectively located on both sides of the limit pin. Alternatively, the inner diameter of the second ring body may be larger than that of the first ring body, and the roller and the limit pin are respectively located on both sides of the pin shaft; or the inner diameter of the second ring body may be smaller than that of the first ring body, and the pin shaft and the roller in the clamp are respectively located on both sides of the limit pin. In the former structure, the first strip hole needs to be arranged on the outside of the swing arm, and the setting space is limited. In addition, due to the setting of the first strip hole, the length of the swing arm will be longer and the overall structure will be larger. In the latter structure, the first strip hole is arranged on the inside of the swing arm, and the setting space is relatively abundant, the installation is more convenient, and the structure is more compact.

[0007] Furthermore, the inner wall of the first ring body is provided with an annular groove along its circumference, and the second ring body can be rotatably mounted in the annular groove of the first ring body. The first ring body and the second ring body can be arranged along the axial direction of the ring body assembly, and the second ring body can also be mounted in the annular groove of the first ring body. Compared with the former, the latter has a more compact structure.

[0008] Furthermore, a ball bearing is installed in the annular groove and between the first ring body and the second ring body. The arrangement of the ball bearing can form rolling friction between the first ring body and the second ring body, facilitating the flexible rotation of the second ring body.

[0009] Furthermore, the roller is a bearing, which is easy to obtain and has a strong structural strength.

[0010] Furthermore, the number of the clamping jaws is three. The number of the clamping jaws can be three, four or more. The structure of the three clamping jaws is simpler and more stable when subjected to force.

[0011] Furthermore, the second ring body is provided with a handle, which can more conveniently apply force and rotate the second ring body to open the clamping space.

[0012] Furthermore, the mounting frame includes a vertical plate, a second strip hole is formed on the vertical plate, the second strip hole is vertically arranged, and a height adjustment bolt is arranged corresponding to the second strip hole, and the height adjustment bolt passes through the first ring body and the second strip hole to lock the first ring body and the vertical plate. This arrangement can conveniently adjust the height of the ring body assembly to adapt to different lathe installations. At the same time, during the installation of the ring body assembly, the height of the ring body assembly can also be finely adjusted so that the ring body assembly is coaxial with the lathe spindle height.

[0013] Furthermore, the mounting frame further comprises a crossbeam, on which a third strip hole is formed, the third strip hole is arranged horizontally, and a transverse bolt is arranged corresponding to the third strip hole, and the transverse bolt passes through the vertical plate and the third strip hole to lock the vertical plate and the crossbeam. This arrangement can conveniently adjust the level of the ring assembly to adapt to different lathe installations, and at the same time, during the installation of the ring assembly, it is also convenient to fine-tune the horizontal position of the ring assembly so that the ring assembly is highly coaxial with the lathe spindle.

[0014] Furthermore, a card slot is provided at the bottom of the mounting frame. When the lathe rapid alignment device is installed on the lathe, the card slot is clamped on the longitudinal beam on the lathe to form positioning and assembly. The provision of the card slot facilitates the rapid positioning and assembly of the lathe rapid alignment device and the lathe.

[0015] Furthermore, the lathe rapid alignment device is installed on the lathe, and the ring body assembly is coaxial with the main shaft of the lathe.

[0016] The invention discloses a rapid alignment device for a lathe, wherein the clamping and alignment mechanism for aligning a workpiece comprises more than three clamping jaws, which are evenly arranged in the circumferential direction to surround and clamp the workpiece. Under the surrounding and clamping of the more than three clamping jaws, the workpiece is subjected to force and its position is gradually adjusted until the workpiece does not jump or move, which means that the workpiece is aligned with the main axis of the lathe, and the alignment of the workpiece position is achieved. The more than three clamping jaws are distributed in the circumferential direction. When aligning the workpiece, the more than three clamping jaws distributed in the circumferential direction form an enclosing structure. While the workpiece is limited in the enclosing structure, the more than three clamping jaws also form multi-point alignment for the workpiece. Under the multi-point alignment structure, the workpiece can be aligned multiple times every time it rotates one circle, and the alignment speed is fast and the efficiency is high.

[0017] The rapid alignment device for a lathe of the present invention is such that the clamp includes the swing arm, the limit pin and the roller, and after the limit pin is inserted into the first strip hole on the swing arm, the limit pin can be moved to drive the swing arm to swing, thereby enabling the clamp to approach or move away from the workpiece, thereby completing the alignment operation on the workpiece. Under the structure of the clamp described above, the structure is simple, and a relatively small movement of the limit pin can achieve a relatively large range of swing of the swing arm, and the limit pin drive transmission is highly efficient. More importantly, the drive movement of the limit pin is not limited to linear movement, and can also be rotation. This greatly facilitates the drive setting of the clamp, especially when the number of the clamps is large, and there are more than three of them, which provides great convenience for the setting of multiple clamps.

[0018] The rapid alignment device for lathes of the present invention is based on the structure of the above-mentioned clamping jaws, combined with the setting of the ring body assembly including the first ring body and the second ring body, so that the swing arm is installed on the first ring body, the limit pin is installed on the second ring body, and then the second ring body is rotated, and the limit pin can drive the swing arm to swing, thereby realizing the alignment operation of the workpiece. The ring body structure of the ring body assembly not only provides installation conditions for the circumferential distribution of more than three clamping jaws, but also enables the swing of all the swing arms to be uniformly driven by the first ring body. The structure installed on the ring body assembly and driven by the unified drive structure of the first ring body not only simplifies the structure and operation, but also makes the swing of the clamping jaws more synchronous, so as to form the closing and opening of the clamping space, which is convenient for the alignment operation of the workpiece.

[0019] In addition, the rapid alignment device for the lathe of the present invention provides a pre-tightening force for the closure of the clamping space through the tension spring, so that after the workpiece passes through the clamping space, during the alignment process, the clamping jaws can automatically clamp the workpiece for alignment under the force of the tension spring, and no manual intervention is required during the rotation and alignment of the workpiece, which saves time and effort while allowing manual work to be kept away from the rotating workpiece to ensure the safety of the operation; and the deformability of the tension spring allows the clamping jaws to adapt to the jumping and movement of the workpiece during the process of clamping the workpiece for alignment, thereby protecting itself while also protecting the workpiece from damage.

[0020] The invention relates to a rapid alignment device for a lathe. When the clamping jaws clamp a workpiece for alignment, the rotatable roller directly contacts the workpiece mounted on the lathe to form a clamping relationship. The roller and the workpiece mounted on the lathe can roll relative to each other with low friction. The roller is not easily damaged by friction and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the lathe rapid alignment device of the present invention from the first viewing angle; Figure 2It is a schematic diagram of the three-dimensional structure of the lathe rapid alignment device of the present invention under the second viewing angle; Figure 3 yes Figure 2 Cross-section along line AA. DETAILED DESCRIPTION

[0022] The specific implementation of the lathe rapid alignment device of the present invention is described in detail below with reference to the accompanying drawings: like Figures 1 to 3 As shown, a lathe rapid alignment device comprises a mounting frame 10 and a ring body assembly 1, wherein the ring body assembly 1 comprises a coaxial first ring body 11 and a second ring body 12, wherein the first ring body 11 is vertically mounted on the mounting frame 10, and the second ring body 12 is rotatably mounted, and a clamping alignment mechanism 2 is provided on the ring body assembly 1, wherein the clamping alignment mechanism 2 comprises more than three clamping jaws 20, and the more than three clamping jaws 20 are evenly arranged and distributed along the circumference of the ring body assembly 1; each of the clamping jaws 20 comprises a swing arm 21, a limit pin 22 and a roller 23, wherein the swing arm 21 is hingedly mounted on the first ring body 11 through a pin shaft 210, and the pin shaft 210 is parallel to the axial direction of the ring body assembly 1, and a first strip hole 2 is provided on the swing arm 21 11, the length direction of the first strip hole 211 is consistent with the length direction of the swing arm 21, the limit pin 22 is fixedly installed on the second ring body 12, the limit pin 22 extends into the first strip hole 211, the roller 23 is rotatably installed on one end of the swing arm 21 close to the center of the ring body assembly 1, the roller 23 protrudes from the swing arm 21, the pin shaft 210, the limit pin 22 and the roller 23 are all located at different positions of the swing arm 21; a clamping space is formed between the rollers 23 of all the clamping jaws 20 in the clamping and alignment mechanism 2; one end of a tension spring 3 is connected to the mounting frame 10, and the other end is connected to the second ring body 12, and the tension spring 3 has a preload force to close the clamping space.

[0023] The invention relates to a rapid alignment device for a lathe. The clamping and alignment mechanism 2 is installed on the ring body assembly 1 and is composed of more than three clamping jaws 20. The clamping and alignment mechanism 2 is used to clamp the workpiece installed on the lathe and align the workpiece installed on the lathe. The clamping jaw 20 includes the swing arm 21, the limit pin 22 and the roller 23. The swing arm 21 is hingedly installed on the first ring body 11 and has a swinging condition. The limit pin 22 is installed on the second ring body 12 and extends into the first strip hole 211 to cooperate with the first strip hole 211. Under the structure of the limit pin 22 and the first strip hole 211, the second ring body 12 can rotate. During the rotation of the second ring body 12, the swing arm 21 can also be driven to swing. The roller 23 is rotatably installed on the swing arm 21 and is used to directly contact the workpiece installed on the lathe to form a clamping relationship. The tension spring 3 is used to provide a preload force for the closure of the clamping space.

[0024] The lathe quick alignment device of the present invention is installed on the lathe when in use, and the ring body assembly 1 is coaxial with the main shaft of the lathe; the second ring body 12 is rotated by applying force, such as Figure 1 The second ring body 12 is rotated counterclockwise, the limit pin 22 moves in the first strip hole 211, and pushes the swing arm 21 to swing away from the center of the ring body assembly 1, so that the clamping space is opened; then, the workpiece is passed through the clamping space and pre-fastened on the chuck of the lathe; the second ring body 12 is released, and under the tension of the tension spring 3, the second ring body 12 rotates clockwise, the limit pin 22 moves in the first strip hole 211, and pushes the swing arm 21 to swing toward the center of the ring body assembly 1, so that the clamping space is closed, and the roller 23 of the clamp 20 clamps the workpiece. After that, the lathe is started, and the workpiece pre-fastened on the lathe chuck rotates with the lathe. During the rotation of the workpiece, under the clamping force of the roller 23, the radial runout of the workpiece gradually decreases until the workpiece has no radial runout, and the alignment of the workpiece is completed. The workpiece is aligned with the lathe spindle. After the alignment is completed, the lathe is paused and the lathe chuck is clamped to tighten the workpiece and the lathe chuck. In this way, the entire clamping and alignment operation of the workpiece is completed.

[0025] The fast alignment device for a lathe of the present invention comprises a clamping and alignment mechanism 2 for aligning a workpiece, wherein the clamping and alignment mechanism 2 for aligning a workpiece comprises more than three clamping jaws 20, and the more than three clamping jaws 20 are evenly arranged in the circumferential direction to surround and clamp the workpiece. Under the surrounding and clamping of the more than three clamping jaws 20, the workpiece is subjected to force and its position is gradually adjusted until the workpiece does not jump or move, which means that the workpiece is aligned with the main axis of the lathe, and the alignment of the workpiece position is achieved. The more than three clamping jaws 20 are distributed in the circumferential direction. When aligning the workpiece, the more than three clamping jaws 20 distributed in the circumferential direction form an enclosing structure. While the workpiece is limited in the enclosing structure, the more than three clamping jaws 20 also form a multi-point alignment for the workpiece. Under the multi-point alignment structure, the workpiece can be aligned multiple times every time it rotates one circle, and the alignment speed is fast and the efficiency is high.

[0026] The lathe quick alignment device of the present invention comprises the swing arm 21, the limit pin 22 and the roller 23, and after the limit pin 22 is inserted into the first strip hole 211 on the swing arm 21, the limit pin 22 is moved to drive the swing arm 21 to swing, thereby realizing the clamp 20 to approach or move away from the workpiece, and completing the alignment operation of the workpiece. Under the structure of the clamp 20 described above, its structure is simple, and a relatively small movement of the limit pin 22 can realize a relatively large range of swing of the swing arm 21, and the drive transmission efficiency of the limit pin 22 is high. More importantly, the drive movement of the limit pin 22 is not limited, and is not limited to linear movement, and can also be rotation. In this way, the drive setting of the clamp 20 is greatly facilitated, especially when the number of the clamps 20 is large, and there are more than three distributed, it provides great convenience for the setting of multiple clamps 20.

[0027] The lathe rapid alignment device of the present invention is based on the structure of the above-mentioned clamping jaws 20, combined with the setting of the ring body assembly 1 including the first ring body 11 and the second ring body 12, so that the swing arm 21 is installed on the first ring body 11, the limit pin 22 is installed on the second ring body 12, and then the second ring body 12 is rotated, and the limit pin 22 can drive the swing arm 21 to swing, thereby realizing the alignment operation of the workpiece. The ring body structure of the ring body assembly 1 provides installation conditions for the circumferential distribution of more than three clamping jaws 20, and also enables the swing of all the swing arms 21 to be uniformly driven by the first ring body 11. The structure installed on the ring body assembly 1 and driven by the first ring body 11 not only simplifies the structure and operation, but also makes the swing synchronization of the clamping jaws 20 better, so as to form the closing and opening of the clamping space, and facilitate the alignment operation of the workpiece.

[0028] In addition, the rapid alignment device for the lathe of the present invention provides a pre-tightening force for the closure of the clamping space through the tension spring 3, so that after the workpiece passes through the clamping space, during the alignment process, under the action of the tension spring 3, the clamping jaws 20 can automatically clamp the workpiece for alignment, and no manual intervention is required during the rotation and alignment of the workpiece, which saves time and effort, and the manual work can be kept away from the rotating workpiece to ensure the safety of the operation; and the deformability of the tension spring 3 makes it possible for the clamping jaws 20 to adapt to the jumping and movement of the workpiece during the process of clamping the workpiece for alignment, thereby protecting itself and the workpiece from damage.

[0029] In the rapid alignment device for a lathe of the present invention, when the clamping jaws 20 clamp a workpiece for alignment, the rotatable roller 23 directly contacts the workpiece mounted on the lathe to form a clamping relationship. The roller 23 and the workpiece mounted on the lathe can roll relative to each other with low friction. The roller 23 is not easily damaged by friction and has a long service life.

[0030] In the lathe quick alignment device of the present invention, preferably, the second ring body 12 can be rotatably mounted on the first ring body 11. The second ring body 12 can be rotatably mounted on the mounting frame 10, or can be rotatably mounted on the first ring body 11. Compared with the former, the latter, in which the second ring body 12 can be rotatably mounted on the first ring body 11, can improve the integration of the second ring body 12 and the first ring body 11, so that the matching arrangement of the swing arm 21 and the limit pin 22 in the clamp 20 is also more convenient; on the other hand, the mounting frame 10 does not need to be complicatedly arranged for the installation of the second ring body 12, and the whole structure is relatively simpler.

[0031] In the lathe quick alignment device of the present invention, preferably, the inner diameter R2 of the second ring body 12 is smaller than the inner diameter R1 of the first ring body 11, and the pin shaft 210 and the roller 23 in the clamp 20 are respectively located on both sides of the limit pin 22. Alternatively, the inner diameter R2 of the second ring body 12 may be larger than the inner diameter R1 of the first ring body 11, and the roller 23 and the limit pin 22 are respectively located on both sides of the pin shaft 210; or the inner diameter R2 of the second ring body 12 may be smaller than the inner diameter R1 of the first ring body 11, and the pin shaft 210 and the roller 23 in the clamp 20 are respectively located on both sides of the limit pin 22. In the former structure, the first strip hole 211 needs to be arranged on the outside of the swing arm 21, and the arrangement space is limited. Moreover, due to the arrangement of the first strip hole 211, the length of the swing arm 21 is longer, and the overall structure is larger. In the latter structure, the first strip hole 211 is arranged on the inner side of the swing arm 21, which provides more space, is more convenient to install, and has a more compact structure.

[0032] In the lathe quick alignment device of the present invention, preferably, the inner wall of the first ring body 11 is provided with an annular groove 111 along its circumference, and the second ring body 12 can be rotatably mounted in the annular groove 111 of the first ring body 11. The first ring body 11 and the second ring body 12 can be arranged along the axial direction of the ring body assembly 1, and the second ring body 12 can also be mounted in the annular groove 111 of the first ring body 11. Compared with the former, the latter has a more compact structure.

[0033] In the lathe quick alignment device of the present invention, preferably, a ball 112 is installed in the annular groove 111 and between the first ring body 11 and the second ring body 12. The arrangement of the ball 112 can form rolling friction between the first ring body 11 and the second ring body 12, facilitating the flexible rotation of the second ring body 12.

[0034] In the lathe quick alignment device of the present invention, preferably, the roller 23 is a bearing. The bearing is easy to obtain and has a strong structural strength.

[0035] In the lathe quick alignment device of the present invention, preferably, the number of the clamping jaws 20 is three. The number of the clamping jaws 20 can be three, four or more. The structure of the three clamping jaws 20 is simpler and more stable when subjected to force.

[0036] In the lathe quick alignment device of the present invention, preferably, a handle 13 is provided on the second ring body 12. The arrangement of the handle 13 can more conveniently apply force, rotate the second ring body 12, and open the clamping space.

[0037] The quick alignment device for a lathe of the present invention is preferably such that the mounting frame 10 includes a vertical plate 101, the vertical plate 101 is provided with a second strip hole 1011, the second strip hole 1011 is vertically arranged, and a height adjustment bolt 1012 is arranged corresponding to the second strip hole 1011, and the height adjustment bolt 1012 passes through the first ring body 11 and the second strip hole 1011 to lock the first ring body 11 and the vertical plate 101. This arrangement can conveniently adjust the height of the ring body assembly 1 to adapt to different lathe installations, and at the same time, during the installation of the ring body assembly 1, it can also conveniently fine-tune the height of the ring body assembly 1 so that the ring body assembly 1 is coaxial with the lathe spindle height.

[0038] The lathe quick alignment device of the present invention preferably comprises a mounting frame 10 further comprising a crossbeam 102, a third strip hole 1021 is provided on the crossbeam 102, the third strip hole 1021 is arranged horizontally, and a transverse bolt 1022 is arranged corresponding to the third strip hole 1021, and the transverse bolt 1022 locks the vertical plate 101 and the crossbeam 102 after passing through the vertical plate 101 and the third strip hole 1021. This arrangement can conveniently adjust the level of the ring assembly 1 to adapt to different lathe installations, and at the same time, during the installation of the ring assembly 1, it can also conveniently fine-tune the horizontal position of the ring assembly 1 so that the ring assembly 1 is highly coaxial with the lathe spindle.

[0039] The lathe quick alignment device of the present invention is preferably provided with a slot 103 at the bottom of the mounting frame 10. When the lathe quick alignment device is installed on the lathe, the slot 103 is clamped on the longitudinal beam 301 on the lathe to form positioning and assembly. The provision of the slot 103 facilitates the quick positioning and assembly of the lathe quick alignment device and the lathe.

[0040] In the rapid alignment device for a lathe of the present invention, the second ring body 12 is in the shape of a racket.

[0041] For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A lathe rapid alignment device, characterized in that: The invention comprises a mounting frame and a ring body component, wherein the ring body component comprises a coaxial first ring body and a second ring body, wherein the first ring body is vertically mounted on the mounting frame, and the second ring body is rotatably mounted, and a clamping and aligning mechanism is provided on the ring body component, wherein the clamping and aligning mechanism comprises more than three clamping jaws, and the more than three clamping jaws are evenly arranged and distributed along the circumference of the ring body component; each of the clamping jaws comprises a swing arm, a limit pin and a roller, and the swing arm is hingedly mounted on the first ring body through a pin shaft, and the pin shaft is parallel to the axial direction of the ring body component, and a first strip hole is opened on the swing arm, and the first strip hole is The length direction of the strip-shaped hole is consistent with the length direction of the swing arm, the limit pin is fixedly installed on the second ring body, the limit pin extends into the first strip-shaped hole, the roller is rotatably installed on one end of the swing arm close to the center of the ring body assembly, the roller protrudes out of the swing arm, the pin shaft, the limit pin and the roller are all located at different positions of the swing arm; a clamping space is formed between the rollers of all the clamping jaws in the clamping and alignment mechanism; one end of a tension spring is connected to the mounting frame, and the other end is connected to the second ring body, and the tension spring has a preload force to close the clamping space.

2. The lathe rapid alignment device according to claim 1, characterized in that: The inner diameter of the second ring body is smaller than the inner diameter of the first ring body, and the pin shaft and the roller in the clamp are respectively located on both sides of the limit pin.

3. The lathe rapid alignment device according to claim 1, characterized in that: An annular groove is formed on the inner wall of the first ring body along its circumference, and the second ring body can be rotatably sleeved in the annular groove of the first ring body.

4. The lathe rapid alignment device according to claim 4, characterized in that: Balls are installed in the annular groove and between the first ring body and the second ring body.

5. The lathe rapid alignment device according to claim 1, characterized in that: The number of the clamping jaws is three.

6. The lathe rapid alignment device according to claim 1, characterized in that: The roller is a bearing; and a handle is provided on the second ring body.

7. The lathe rapid alignment device according to claim 1, characterized in that: The mounting frame includes a vertical plate, a second strip hole is opened on the vertical plate, the second strip hole is vertically arranged, and a height adjustment bolt is correspondingly arranged in the second strip hole. The height adjustment bolt passes through the first ring body and the second strip hole to lock the first ring body and the vertical plate.

8. The lathe rapid alignment device according to claim 7, characterized in that: The mounting frame also includes a crossbeam, which is provided with a third strip hole, the third strip hole is horizontally arranged, and a transverse bolt is correspondingly arranged in the third strip hole. The transverse bolt passes through the vertical plate and the third strip hole to lock the vertical plate and the crossbeam.

9. The lathe rapid alignment device according to claim 1, characterized in that: A card slot is provided at the bottom of the mounting frame.

10. The lathe rapid alignment device according to claim 1, characterized in that: Installed on a lathe, the ring assembly is coaxial with the main shaft of the lathe.

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