CNC lathe and sprocket turning process

Abstract

The present invention relates to the technical field of intelligent manufacturing equipment industry, and discloses a turning process of a CNC lathe and a sprocket, comprising a shell, a turning mechanism and a clamping mechanism, wherein the clamping mechanism can drive the clamped workpiece to rotate so that different positions on the surface of the clamped workpiece are close to the turning tool of the turning mechanism; the clamping mechanism comprises a chuck, an adjusting disk, a telescopic arm, a clamping jaw and a control component, and the chuck is rotatably arranged inside the shell; the CNC lathe, by arranging a chuck, a telescopic arm, a clamping jaw, a spring and a retaining ring, since the clamping jaw is rotatably installed on the telescopic arm, and a spring is also connected between the clamping jaw and the telescopic arm, one end of the clamping jaw is always in contact with the retaining ring due to the tension of the spring, therefore, when the clamping jaw moves to the stepped groove and the slope groove set on the surface of the retaining ring, it can rotate automatically to loosen the clamping of the sprocket, making the operation of the CNC lathe simpler and more convenient, facilitating the improvement of the intelligence level of sprocket processing, and reducing manual participation.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent manufacturing equipment industry, and specifically to a CNC lathe and a sprocket turning process. Background Art

[0002] A sprocket is a mechanical part used for transmission. Its structure includes teeth, hubs, and spokes. During the processing of sprockets, a CNC lathe is needed to turn the sprocket teeth into shape. The processing method is to fix the preformed sprocket blank on the CNC lathe, and then use a turning tool to cut the sprocket teeth in the outer circular groove of the sprocket blank. During the turning process of the sprocket, three-jaw chucks, four-jaw chucks, faceplates and other fixtures are usually used to clamp the sprocket.

[0003] Chinese patent application CN219944637U discloses a lathe for sprocket production and processing. Through a supporting structure, a clamping structure, a positioning structure and a driving structure, the sprocket base plate can be driven to rotate when clamping the sprocket base plate without first opening a center hole. The center hole is then positioned by a three-jaw chuck to clamp the sprocket base plate and drive the sprocket base plate to rotate in the clamping slot.

[0004] However, when using the above-mentioned device to process sprockets, since the size of the roller cannot be changed and the curvature of the movable top plate cannot be changed, the device can only clamp and fix the sprocket base plate of one diameter, and its flexibility is poor. At the same time, the sprocket base plate encounters great resistance during rotation and is prone to getting stuck, affecting the turning efficiency. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a CNC lathe and a sprocket turning process, which has the function of clamping sprocket blanks of different diameters and can be clamped and turned without opening a center hole in advance, thereby solving the problems mentioned in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A CNC lathe comprises a housing, a turning mechanism and a clamping mechanism, wherein the clamping mechanism is capable of driving a clamped workpiece to rotate so that different positions on the surface of the clamped workpiece are close to a turning tool of the turning mechanism;

[0008] The clamping mechanism includes a chuck, an adjustment disk, a telescopic arm, a clamping claw and a control assembly. The chuck is rotatably arranged inside the housing, the telescopic arm is slidably mounted on the chuck, the adjustment disk is used to control the sliding of the telescopic arm, thereby changing the length of the telescopic arm extending out of the chuck, the clamping claw is rotatably mounted on the telescopic arm, and the control assembly is used to control the angle between the clamping claw and the telescopic arm;

[0009] The control assembly includes a spring and a retaining ring. The two ends of the spring are respectively connected to the telescopic arm and the clamping claw, and are used to pull the clamping claw to release the clamped workpiece. The retaining ring is slidably installed inside the housing, and a side wall of the retaining ring abuts against the clamping claw.

[0010] A support frame is fixedly installed inside the shell, and the support frame is fixedly installed inside the shell, and the support frame is used to support the chuck and the retaining ring;

[0011] The turning mechanism and the clamping mechanism are both installed inside the shell. The turning mechanism has a three-axial movement function, and a turning tool is detachably installed on the turning mechanism.

[0012] Preferably, the chuck includes a front plate, a rear plate and a guide ring, the front plate and the rear plate are fixedly connected by the guide ring, the guide ring is provided with through holes distributed in a circular array, the telescopic arm is slidably connected to the through holes, and one end of the telescopic arm extends to the outside of the front plate.

[0013] Preferably, a cavity is provided inside the adjusting disk, and channels connecting the cavity are provided at both ends thereof, one end of the telescopic arm passes through the channel and extends into the interior of the cavity, an adjustment hole is provided on one side wall of the adjusting disk that passes through the interior of the cavity, a sliding rod is fixedly installed on the telescopic arm, and the sliding rod is slidably connected to the adjustment hole.

[0014] Preferably, the adjusting disk is arranged between the front plate and the rear plate, and a connecting rod is fixedly installed on the end of the adjusting disk, the connecting rod passes through a side wall of the rear plate and is rotatably connected to the rear plate, and a worm gear is fixedly installed on the connecting rod, and a worm is rotatably installed on the rear plate, and the worm gear is transmission-connected to the worm gear. An adjusting motor is also fixedly installed on the rear plate, and the driving end of the adjusting motor is fixedly connected to the worm gear.

[0015] Preferably, a connecting piece is fixedly installed on the telescopic arm, and the clamping jaw includes a clamping head and a clamping handle, the clamping head and the clamping handle are fixedly connected, the clamping handle is rotatably connected to the connecting piece, the two ends of the spring are rotatably connected to the telescopic arm and the clamping handle respectively, and a mounting plate is fixedly installed on the end of the clamping handle away from the clamping head, and a roller is rotatably installed on the mounting plate, and the roller is in rolling contact with a side wall of the retaining ring.

[0016] Preferably, a side wall of the retaining ring is provided with a stepped groove and a sloped groove, one end of the stepped groove and the bottom end of the sloped groove are smoothly transitioned, and the top end of the sloped groove and the side wall of the retaining ring are smoothly transitioned.

[0017] Preferably, a circular ring is fixedly mounted on the support frame, an arc-shaped slider is fixedly mounted on the rear plate, the arc-shaped slider is rotatably connected to the circular ring, a driving motor is also fixedly mounted on the support frame, and a driving end of the driving motor is fixedly connected to the chuck.

[0018] Preferably, a horizontal drive mechanism is also provided inside the shell, and the horizontal drive mechanism includes an internal threaded cylinder, a threaded rod, a rotating rod, a transmission pulley and an opening and closing control motor. The internal threaded cylinder is rotatably mounted on the support frame, the threaded rod is fixedly connected to the retaining ring, and the threaded rod is threadedly connected to the internal threaded cylinder, the rotating rod is fixedly mounted on the internal threaded cylinder, and adjacent rotating rods are connected by a transmission pulley. The opening and closing control motor is fixedly mounted on the support frame, and the driving end of the opening and closing control motor is transmission-connected to one of the rotating rods.

[0019] Preferably, a support plate is fixedly installed inside the shell, a support groove is provided at the upper end of the support plate, a roller groove is provided on the inner side wall of the support groove, a support roller is rotatably installed in the roller groove, a support rod is placed in the support groove, a slot is provided on the surface of the front plate, one end of the support rod is plugged into the slot, and a clamping plate is fixedly installed on the support rod, the clamping plate is clamped by the clamping mechanism, and a locking nut is threadedly connected to the end of the support rod away from the clamping plate.

[0020] The present invention also discloses a sprocket turning process, which specifically comprises the following steps:

[0021] Use a measuring tool to measure the diameter of the sprocket blank to be turned, and adjust the length of the telescopic arm extending out of the chuck according to the diameter of the sprocket blank;

[0022] All the jaws are opened by the retaining ring, the sprocket blank is placed between the opened jaws, and then the retaining ring is controlled to move in the reverse direction so that multiple jaws grasp the sprocket blank;

[0023] The turning mechanism drives the turning tool to move and turn the fixed sprocket blank, and after one of the gear teeth is turned, the chuck is controlled to rotate so that the next turning position is close to the turning tool of the turning mechanism.

[0024] Compared with the prior art, the present invention provides a CNC lathe and a sprocket turning process, which has the following beneficial effects:

[0025] 1. The CNC lathe is provided with a chuck, a telescopic arm, a clamping jaw, a spring and a retaining ring. Since the clamping jaw is rotatably mounted on the telescopic arm and a spring is connected between the clamping jaw and the telescopic arm, one end of the clamping jaw is always in contact with the retaining ring due to the tension of the spring. Therefore, when the clamping jaw moves to the stepped groove and the slope groove provided on the surface of the retaining ring, it can rotate and release the clamping of the sprocket by itself, making the operation of the CNC lathe simpler and more convenient, facilitating the improvement of the intelligent level of sprocket processing and reducing manual participation. Therefore, By controlling the movement of the turning tool installed on the turning mechanism near the stepped groove, the clamping jaw can automatically release the clamping of the sprocket when it approaches the turning tool, which can avoid collision between the clamping jaw and the turning tool, while the clamping of the sprocket by other clamping jaws is not affected. Therefore, the clamping jaw holding the sprocket can automatically release to avoid the turning tool when it approaches the turning tool of the turning mechanism, and the clamping jaw can automatically resume clamping the edge of the sprocket after moving away from the turning tool. At any time, at most only one clamping jaw is not in contact with the sprocket, thereby ensuring the firmness of the clamping.

[0026] 2. The CNC lathe is provided with an adjusting disk, an adjusting hole and a sliding rod. When the adjusting disk rotates relative to the chuck, the sliding rod slides in the adjusting hole, causing the telescopic rod to extend and retract on the chuck, thereby changing the diameter of the workpiece that the clamping mechanism can clamp, which is convenient for clamping sprockets of different diameters. By providing a worm gear, a worm and an adjusting motor, it is convenient to control the rotation angle of the adjusting disk relative to the chuck. At the same time, due to the provision of the retaining ring, when a sprocket is processed, all the clamping jaws can release the sprocket by means of translation of the retaining ring, which is convenient for removing the sprocket for replacement. Moreover, when clamping the same model of sprocket, there is no need to adjust the extension length of the telescopic arm again. The clamping can be restored by controlling the reverse movement of the retaining ring.

[0027] 3. The CNC lathe is provided with a roller so that when the chuck rotates, the roller rolls on the retaining ring and does not easily cause the clamping jaw to shake, thereby ensuring the firmness of the clamping jaw holding the sprocket and preventing the sprocket from loosening due to the shaking of the clamping jaw. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is one of the three-dimensional structural schematic diagrams of the CNC lathe of the present invention;

[0029] Figure 2 This is the second schematic diagram of the three-dimensional structure of the CNC lathe of the present invention;

[0030] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the local structure at point A in the middle;

[0031] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the local structure at point B in the middle;

[0032] Figure 5This is one of the exploded schematic views of the three-dimensional structure of the CNC lathe of the present invention;

[0033] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the local structure at point C in the middle;

[0034] Figure 7 This is the second exploded schematic diagram of the three-dimensional structure of the CNC lathe of the present invention;

[0035] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the local structure at D in the middle;

[0036] Figure 9 This is the third schematic diagram of the three-dimensional structure of the CNC lathe of the present invention.

[0037] In the picture:

[0038] 1. Shell;

[0039] 2. Turning mechanism;

[0040] 3. Clamping mechanism; 31. Chuck; 311. Front plate; 312. Rear plate; 313. Guide ring; 314. Through hole; 315. Arc-shaped slider; 316. Slot; 32. Adjusting plate; 321. Adjusting hole; 322. Connecting rod; 323. Worm gear; 324. Worm; 325. Adjusting motor; 33. Telescopic arm; 331. Sliding rod; 332. Connecting piece; 34. Clamping jaw; 341. Collet; 342. Clamping handle; 343. Mounting plate; 344. Roller; 35. Spring; 36. Retaining ring; 361. Step groove; 362. Slope groove; 37. Driving motor;

[0041] 4. Support frame; 41. Ring;

[0042] 5. Horizontal drive mechanism; 51. Internally threaded cylinder; 52. Threaded rod; 53. Rotating rod; 54. Drive pulley; 55. Opening and closing control motor;

[0043] 6. Support plate; 61. Support groove; 62. Support roller;

[0044] 7. Support rod; 71. Clamping plate; 72. Locking nut. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0046] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 The present invention provides a CNC lathe, comprising a housing 1, a turning mechanism 2, and a clamping mechanism 3, wherein the clamping mechanism 3 is capable of driving a clamped workpiece to rotate so that different positions on the surface of the clamped workpiece are close to a turning tool of the turning mechanism 2;

[0047] The clamping mechanism 3 includes a chuck 31, an adjustment disk 32, a telescopic arm 33, a clamping claw 34, and a control assembly. The chuck 31 is rotatably mounted inside the housing 1, and the telescopic arm 33 is slidably mounted on the chuck 31. The adjustment disk 32 is used to control the sliding of the telescopic arm 33, thereby changing the length of the telescopic arm 33 extending out of the chuck 31. The clamping claw 34 is rotatably mounted on the telescopic arm 33, and the control assembly is used to control the angle between the clamping claw 34 and the telescopic arm 33.

[0048] The control assembly includes a spring 35 and a retaining ring 36. The two ends of the spring 35 are respectively connected to the telescopic arm 33 and the clamping jaw 34, and are used to pull the clamping jaw 34 to release the clamped workpiece. The retaining ring 36 is slidably installed inside the housing 1, and a side wall of the retaining ring 36 abuts against the clamping jaw 34.

[0049] A support frame 4 is fixedly installed inside the housing 1. The support frame 4 is fixedly installed inside the housing 1 and is used to support the chuck 31 and the retaining ring 36.

[0050] The turning mechanism 2 and the clamping mechanism 3 are both installed inside the housing 1. The turning mechanism 2 has a three-axial movement function, and a turning tool is detachably installed on the turning mechanism 2.

[0051] As can be seen from the above, the CNC lathe is provided with a chuck 31, a telescopic arm 33, a clamping jaw 34, a spring 35 and a retaining ring 36. Since the clamping jaw 34 is rotatably mounted on the telescopic arm 33, and a spring 35 is connected between the clamping jaw 34 and the telescopic arm 33, one end of the clamping jaw 34 is always in contact with the retaining ring 36 by the tension of the spring 35. Therefore, when the retaining ring 36 moves, the clamping jaw 34 rotates accordingly. When the contact surface between the retaining ring 36 and the clamping jaw 34 is uneven, the clamping jaw 34 will also rotate accordingly. At the same time, since the adjusting disk 32 can adjust the length of the telescopic arm 33 extending out of the chuck 31, when clamping sprocket blanks of different diameters, the extended length of the telescopic arm 33 can be adjusted according to the diameter of the sprocket blank. Moreover, when processing the same type of sprocket blank, there is no need to adjust the extended length of the telescopic arm 33 multiple times. It is only necessary to control the movement of the retaining ring 36 to open all the jaws 34, which is convenient for removing the processed sprocket and clamping the sprocket blank to be processed.

[0052] When using this device, a measuring tool is used to measure the diameter of the sprocket blank to be turned, and the length of the telescopic arm 33 extending out of the chuck 31 is adjusted according to the diameter of the sprocket blank; all the jaws 34 are opened through the retaining ring 36, and the sprocket blank is placed between the opened jaws 34, and then the retaining ring 36 is controlled to move in the opposite direction so that multiple jaws 34 grasp the sprocket blank; the turning tool is driven by the turning mechanism 2 to move and turn the fixed sprocket blank, and after one of the gear teeth is turned, the chuck 31 is controlled to rotate so that the next turning position is close to the turning tool of the turning mechanism 2. Example 2

[0053] like Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the difference between this embodiment and the above embodiment is that the chuck 31 includes a front plate 311, a rear plate 312 and a guide ring 313, the front plate 311 and the rear plate 312 are fixedly connected by the guide ring 313, the guide ring 313 is provided with through holes 314 distributed in a circular array, the telescopic arm 33 is slidably connected to the through holes 314, and one end of the telescopic arm 33 extends to the outside of the front plate 311.

[0054] As can be seen from the above, since the guide ring 313 is provided with a through hole 314 , the telescopic arm 33 can only move in a straight line along the radial direction of the chuck 31 .

[0055] A cavity is provided inside the adjusting disk 32, and a channel connecting the cavity is provided at each end thereof. One end of the telescopic arm 33 extends through the channel to the interior of the cavity. An adjusting hole 321 is provided on one side wall of the adjusting disk 32 and extends into the interior of the cavity. A sliding rod 331 is fixedly installed on the telescopic arm 33, and the sliding rod 331 is slidably connected to the adjusting hole 321.

[0056] As can be seen from the above, the length direction of the adjustment hole 321 does not coincide with the radial direction of the adjustment disk 32, and the sliding rod 331 is fixedly mounted on the telescopic arm 33 that slides radially along the chuck 31. Therefore, when the adjustment disk 32 rotates relative to the chuck 31, the sliding rod 331 is pushed by the hole wall of the adjustment hole 321 to slide linearly relative to the chuck 31.

[0057] The adjusting disk 32 is arranged between the front plate 311 and the rear plate 312, and a connecting rod 322 is fixedly installed on the end of the adjusting disk 32. The connecting rod 322 passes through a side wall of the rear plate 312 and is rotatably connected to the rear plate 312. A worm gear 323 is fixedly installed on the connecting rod 322, and a worm 324 is rotatably installed on the rear plate 312. The worm 324 is transmission-connected to the worm gear 323. An adjusting motor 325 is also fixedly installed on the rear plate 312, and the driving end of the adjusting motor 325 is fixedly connected to the worm 324.

[0058] As can be seen from the above, since the worm 324 is installed on the rear plate 312, and the worm wheel 323 is fixed to the adjusting disk 32 through the connecting rod 322, when the worm 324 rotates, it can drive the worm wheel 323 to drive the adjusting disk 32 to rotate relative to the chuck 31, and the adjusting motor 325 is used to drive the worm 324 forward and reverse, so that the clamping mechanism 3 can clamp disc-shaped workpieces of different diameters. Example 3

[0059] like Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the difference between this embodiment and the above embodiment is that a connecting piece 332 is fixedly installed on the telescopic arm 33, the clamping jaw 34 includes a clamping head 341 and a clamping handle 342, the clamping head 341 and the clamping handle 342 are fixedly connected, the clamping handle 342 is rotatably connected to the connecting piece 332, the two ends of the spring 35 are rotatably connected to the telescopic arm 33 and the clamping handle 342 respectively, and a mounting plate 343 is fixedly installed on the end of the clamping handle 342 away from the clamping head 341, and a roller 344 is rotatably installed on the mounting plate 343, and the roller 344 is in rolling contact with a side wall of the retaining ring 36.

[0060] As can be seen from the above, the spring 35 will pull the clamping handle 342 to fit tightly against one side arm of the retaining ring 36. Since the roller 344 is installed on the clamping handle 342 through the mounting plate 343, the roller 344 replaces the clamping handle 342 to contact the retaining ring 36, making the clamping jaw 34 more stable when rotating relative to the retaining ring 36. In this embodiment, the roller 344 can also be replaced by a ball.

[0061] A side wall of the retaining ring 36 is provided with a stepped groove 361 and a sloped groove 362 . One end of the stepped groove 361 smoothly transitions to the bottom end of the sloped groove 362 , and the top end of the sloped groove 362 smoothly transitions to the side wall of the retaining ring 36 .

[0062] As can be seen from the above, by setting the stepped groove 361, when the clamping handle 342 falls from the surface of the retaining ring 36 into the stepped groove 361, under the tension of the spring 35, the clamping head 341 suddenly releases the edge of the sprocket, and by setting the stepped groove 361, the roller 344 in contact with the stepped groove 361 can roll along the slope groove 362 and re-contact the surface of the retaining ring 36 with rolling contact.

[0063] A circular ring 41 is fixedly mounted on the support frame 4, an arc-shaped slider 315 is fixedly mounted on the rear plate 312, and the arc-shaped slider 315 is rotatably connected to the circular ring 41. A driving motor 37 is also fixedly mounted on the support frame 4, and a driving end of the driving motor 37 is fixedly connected to the chuck 31.

[0064] As can be seen from the above, by providing the circular ring 41 and the arc-shaped slider 315 , the chuck 31 is made more stable when rotating relative to the support frame 4 .

[0065] A horizontal drive mechanism 5 is also provided inside the shell 1, which includes an internal threaded barrel 51, a threaded rod 52, a rotating rod 53, a transmission pulley 54 and an opening and closing control motor 55. The internal threaded barrel 51 is rotatably mounted on the support frame 4, the threaded rod 52 is fixedly connected to the retaining ring 36, and the threaded rod 52 is threadedly connected to the internal threaded barrel 51, the rotating rod 53 is fixedly mounted on the internal threaded barrel 51, and adjacent rotating rods 53 are connected by a transmission pulley 54. The opening and closing control motor 55 is fixedly mounted on the support frame 4, and the driving end of the opening and closing control motor 55 is connected by transmission to one of the rotating rods 53.

[0066] As can be seen from the above, by setting up a horizontal drive mechanism 5, when the driving end of the opening and closing control motor 55 drives one of the rotating rods 53 to rotate, under the transmission action of the transmission pulley 54, all the rotating rods 53 rotate at the same speed and in the same direction, driving all the internal threaded barrels 51 to rotate, so that the threaded rod 52 threadedly connected to the internal threaded barrel 51 slides relative to the internal threaded barrel 51, thereby causing the retaining ring 36 to translate. Example 4

[0067] like Figure 4 、 Figure 8 and Figure 9 As shown, the difference between this embodiment and the above embodiment is that a support plate 6 is further fixedly installed inside the shell 1, and a support groove 61 is provided at the upper end of the support plate 6, and a roller groove is provided on the inner side wall of the support groove 61, in which a support roller 62 is rotatably installed, and a support rod 7 is placed in the support groove 61, and a slot 316 is provided on the surface of the front plate 311, and one end of the support rod 7 is plugged into the slot 316, and a clamping plate 71 is fixedly installed on the support rod 7, and the clamping plate 71 is clamped by the clamping mechanism 3, and a locking nut 72 is threadedly connected to the end of the support rod 7 away from the clamping plate 71.

[0068] As can be seen from the above, in this embodiment, the clamping jaws 34 do not directly clamp the sprocket blank, but clamp the clamping plate 71, so that the support rod 7 can rotate with the chuck 31. Due to the setting of the clamping plate 71 and the locking nut 72, when the center hole of the sprocket blank is opened in advance, multiple sprocket blanks can pass through the support rod 7 and be clamped and fixed by the clamping plate 71 and the locking nut 72. Then, one end of the support rod 7 is inserted into the slot 316, and the other end is inserted into the support groove 61. The clamping jaws 34 clamp the clamping plate 71 to drive all the sprocket blanks to rotate, and the turning tool of the turning mechanism 2 turns the gear teeth on all the sprocket blanks through linear movement. Example 5

[0069] See also Figure 1 - Figure 8 The present invention also discloses a sprocket turning process, which comprises the following specific steps:

[0070] Use a measuring tool to measure the diameter of the sprocket blank to be turned, and adjust the length of the telescopic arm 33 extending out of the chuck 31 according to the diameter of the sprocket blank;

[0071] All the jaws 34 are opened by the retaining ring 36, and the sprocket blank is placed between the opened jaws 34, and then the retaining ring 36 is controlled to move in the reverse direction so that the multiple jaws 34 grasp the sprocket blank;

[0072] The turning tool is driven by the turning mechanism 2 to move and turn the fixed sprocket blank. After the turning of one of the gear teeth is completed, the chuck 31 is controlled to rotate so that the next turning position is close to the turning tool of the turning mechanism 2.

[0073] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A CNC lathe comprising a housing, a turning mechanism and a clamping mechanism, characterized in that: The clamping mechanism can drive the clamped workpiece to rotate so that different positions on the surface of the clamped workpiece are close to the turning tool of the turning mechanism; The clamping mechanism includes a chuck, an adjustment disk, a telescopic arm, a clamping claw and a control assembly. The chuck is rotatably arranged inside the housing, the telescopic arm is slidably mounted on the chuck, the adjustment disk is used to control the sliding of the telescopic arm, thereby changing the length of the telescopic arm extending out of the chuck, the clamping claw is rotatably mounted on the telescopic arm, and the control assembly is used to control the angle between the clamping claw and the telescopic arm; The control assembly includes a spring and a retaining ring. The two ends of the spring are respectively connected to the telescopic arm and the clamping claw, and are used to pull the clamping claw to release the clamped workpiece. The retaining ring is slidably installed inside the housing, and a side wall of the retaining ring abuts against the clamping claw. A support frame is fixedly installed inside the housing, and the support frame is used to support the chuck and the retaining ring; The turning mechanism and the clamping mechanism are both installed inside the housing. The turning mechanism has a three-axial movement function, and a turning tool is detachably installed on the turning mechanism. A connecting piece is fixedly mounted on the telescopic arm, and the clamping jaw includes a clamping head and a clamping handle, the clamping head and the clamping handle are fixedly connected, the clamping handle is rotatably connected to the connecting piece, the two ends of the spring are rotatably connected to the telescopic arm and the clamping handle respectively, and a mounting plate is fixedly mounted on the end of the clamping handle away from the clamping head, a roller is rotatably mounted on the mounting plate, and the roller is in rolling contact with a side wall of the retaining ring; A step groove and a slope groove are provided on one side wall of the retaining ring. One end of the step groove and the bottom end of the slope groove are smoothly transitioned, and the top end of the slope groove and the side wall of the retaining ring are smoothly transitioned. A horizontal drive mechanism is also provided inside the shell, and the horizontal drive mechanism includes an internal threaded cylinder, a threaded rod, a rotating rod, a transmission pulley and an opening and closing control motor. The internal threaded cylinder is rotatably mounted on the support frame, the threaded rod is fixedly connected to the retaining ring, and the threaded rod is threadedly connected to the internal threaded cylinder, the rotating rod is fixedly mounted on the internal threaded cylinder, and adjacent rotating rods are connected by a transmission pulley. The opening and closing control motor is fixedly mounted on the support frame, and the driving end of the opening and closing control motor is transmission-connected to one of the rotating rods.

2. A CNC lathe according to claim 1, characterized in that: The chuck includes a front plate, a rear plate and a guide ring. The front plate and the rear plate are fixedly connected by the guide ring. The guide ring is provided with through holes distributed in a circular array. The telescopic arm is slidably connected to the through holes, and one end of the telescopic arm extends to the outside of the front plate.

3. A CNC lathe according to claim 1, characterized in that: A cavity is provided inside the adjusting disk, and channels communicating with the cavity are provided at both ends thereof. One end of the telescopic arm extends through the channel into the cavity. An adjusting hole penetrating into the cavity is provided on one side wall of the adjusting disk. A sliding rod is fixedly mounted on the telescopic arm, and the sliding rod is slidably connected to the adjusting hole.

4. A CNC lathe according to claim 2, characterized in that: The adjusting disk is arranged between the front plate and the rear plate, and a connecting rod is fixedly installed on the end of the adjusting disk. The connecting rod passes through a side wall of the rear plate and is rotatably connected to the rear plate, and a worm gear is fixedly installed on the connecting rod. A worm is rotatably installed on the rear plate, and the worm gear is transmission-connected to the worm gear. An adjusting motor is also fixedly installed on the rear plate, and a driving end of the adjusting motor is fixedly connected to the worm gear.

5. A CNC lathe according to claim 2, characterized in that: A circular ring is fixedly mounted on the support frame, an arc-shaped slider is fixedly mounted on the rear plate, the arc-shaped slider is rotatably connected to the circular ring, a driving motor is also fixedly mounted on the support frame, and a driving end of the driving motor is fixedly connected to the chuck.

6. A CNC lathe according to claim 2, characterized in that: A support plate is also fixedly installed inside the shell, and a support groove is provided at the upper end of the support plate, and a roller groove is provided on the inner side wall of the support groove. A support roller is rotatably installed in the roller groove, and a support rod is placed in the support groove. A slot is provided on the surface of the front plate, and one end of the support rod is plugged into the slot, and a clamping plate is fixedly installed on the support rod, and the clamping plate is clamped by the clamping mechanism, and a locking nut is threadedly connected to the end of the support rod away from the clamping plate.

7. A sprocket turning process using a CNC lathe according to any one of claims 1 to 6, characterized in that: The specific steps are: Use a measuring tool to measure the diameter of the sprocket blank to be turned, and adjust the length of the telescopic arm extending out of the chuck according to the diameter of the sprocket blank; All the jaws are opened by the retaining ring, the sprocket blank is placed between the opened jaws, and then the retaining ring is controlled to move in the reverse direction so that multiple jaws grasp the sprocket blank; The turning tool is driven by the turning mechanism to move and turn the fixed sprocket blank, and after the turning of one of the gear teeth is completed, the chuck is controlled to rotate so that the next turning position is close to the turning tool of the turning mechanism.

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