A high-precision turning system and method

Abstract

The present invention discloses a high-precision turning system and method, which relates to the field of lathe processing technology, including a positioning disk, a plurality of clamping jaws are arranged on the positioning disk, a pressure block and a graded driving mechanism are also arranged on the positioning disk, and the pressure block is slidably connected to the clamping jaws; the graded driving mechanism has a first stroke for driving the clamping jaws to move radially along the positioning disk and a second stroke for driving the pressure block to move along the clamping jaws. The high-precision turning system and method provided by the present invention, when in use, first places a circular disk between a plurality of clamping jaws, and then drives the plurality of clamping jaws to approach each other radially along the positioning disk through the first stroke of the graded driving mechanism, so as to clamp and fix the circular disk through the plurality of clamping jaws, and at the end of the first stroke, the graded driving mechanism switches to the second stroke to drive the pressure block to approach the positioning disk along the clamping jaws, thereby forcing the circular disk to fit on the positioning disk and be clamped and fixed by the clamping jaws, so as to avoid the disc from being offset or tilted as much as possible.

Description

Technical Field

[0001] The invention relates to the technical field of lathe processing, and in particular to a high-precision turning system and method. Background Art

[0002] Lathe processing is a mechanical processing method that uses a lathe to cut the workpiece. Lathes are usually used to process metal materials. They can complete the processing of various geometric shapes such as the outer circle, inner hole, end face, and thread of the rotating body. During the lathe processing, the workpiece is generally clamped and fixed by a fixture.

[0003] For example, in the patent document entitled "A Turning Fixture" with application publication number CN108817432A and application publication date November 16, 2018, the first, second and third clamping jaws are arranged in the clamping groove of the turntable connected to the spindle to form a three-jaw chuck, and the clamping surface of the first clamping jaw in the circumferential direction is a concave arc surface, and the curvature of the concave arc surface matches the curvature of the outer convex part of the bearing inner cover. The three-jaw chuck in this invention has the function of automatic centering, which can quickly align the bearing inner cover, and the concave arc surface of the clamping jaw surface cooperates with the outer convex part of the bearing inner cover to limit the circumferential rotation of the bearing inner cover relative to the turntable.

[0004] In the prior art, when fixing the disc, the side wall of the disc is generally clamped by a plurality of clamps. When the thickness of the disc is small, it is easy to be fixed by the clamps when it is tilted. Obviously, this is not conducive to high-precision turning of the disc. Summary of the invention

[0005] The object of the present invention is to provide a high-precision turning system and method to solve the above-mentioned deficiencies in the prior art.

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

[0007] A high-precision turning system, comprising a positioning plate, a plurality of clamping claws are arranged on the positioning plate, and the positioning plate is also provided with:

[0008] A pressing block slidably connected to the clamping jaw;

[0009] The graded driving mechanism has a first stroke for driving the clamping jaws to move radially along the positioning plate and a second stroke for driving the pressing block to move along the clamping jaws.

[0010] In the above-mentioned high-precision turning system, a plurality of displacement grooves are constructed on the positioning disk along its radial direction, and a plurality of the clamping jaws are respectively slidably connected in the plurality of displacement grooves.

[0011] In the above-mentioned high-precision turning system, the step-by-step driving mechanism comprises a driving plate rotatably connected to the positioning plate, a plurality of arc grooves are constructed on the driving plate, and a plurality of the clamping jaws are respectively slidably connected in the plurality of arc grooves.

[0012] In the above-mentioned high-precision turning system, the clamping jaw is configured with a slide groove along its length, and the pressing block is slidably connected in the slide groove.

[0013] In the above-mentioned high-precision turning system, a connecting frame is slidably connected to the positioning plate, a connecting rod is fixed to the pressing block, and the connecting rod is limit-connected to the connecting frame.

[0014] In the above-mentioned high-precision turning system, the connecting frame is provided with an adapting groove, and the connecting rod is slidably connected in the adapting groove.

[0015] In the above-mentioned high-precision turning system, the grading drive mechanism further comprises a screw rod rotatably connected to the positioning plate, and the screw rod is threadedly connected to the connecting frame.

[0016] In the above-mentioned high-precision turning system, a rotating shaft is constructed on the driving disc, and the rotating shaft and the screw are coaxially arranged.

[0017] In the above-mentioned high-precision turning system, the graded driving mechanism also includes a driving member, the two ends of the driving member are respectively rotatably connected to the rotating shaft and the screw end, a movable groove is constructed on the driving member, the rotating shaft and the screw end are both fixed with transmission gears, the inner wall of the movable groove is rotatably connected with a driving gear, and the two transmission gears are both located in the movable groove and are meshed with the driving gear.

[0018] A high-precision turning method is based on any of the above turning systems, which can synchronously drive the clamping jaws and the pressing block to operate through the first stroke and the second stroke of the graded driving mechanism, so as to force the workpiece to be clamped by the clamping jaws when it is in contact with the positioning plate.

[0019] In the above technical scheme, the present invention provides a high-precision turning system and method. When in use, a disc is first placed between a plurality of clamps, and then the plurality of clamps are driven to approach each other radially along a positioning disc through a first stroke of a graded driving mechanism, so as to clamp and fix the disc through the plurality of clamps. At the end of the first stroke, the graded driving mechanism switches to a second stroke to drive the pressure block to approach the positioning disc along the clamps, thereby forcing the disc to fit onto the positioning disc and be clamped and fixed by the clamps, thereby avoiding displacement or tilting of the disc as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of a drive disk provided in yet another embodiment of the present invention;

[0023] Figure 3 A cross-sectional view of a positioning plate provided in yet another embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a connecting frame structure provided in yet another embodiment of the present invention;

[0025] Figure 5 A schematic diagram of a transmission gear structure provided by another embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the structure of a driving member provided by another embodiment of the present invention;

[0027] Figure 7 A schematic diagram of an L-shaped rod structure provided by another embodiment of the present invention;

[0028] Figure 8 A schematic diagram of the locking block structure provided by another embodiment of the present invention;

[0029] Fig. 9 A schematic diagram of a wedge surface structure provided in another embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1. Positioning plate; 2. Clamping claw; 3. Pressure block; 4. Displacement groove; 5. Driving plate; 6. Arc groove; 7. Slide groove; 8. Connecting frame; 9. Connecting rod; 10. Extension part; 11. Connecting groove; 12. Adapter groove; 13. Screw rod; 14. Rotating shaft; 15. Driving member; 16. Transmission gear; 17. Driving gear; 18. Fitting groove; 19. Locking block; 20. Elastic member; 21. L-shaped rod; 22. Wedge surface. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Reference Figure 1-9An embodiment of the present invention provides a high-precision turning system, including a positioning plate 1, on which a plurality of clamps 2 are arranged, and a pressure block 3 and a graded driving mechanism are also arranged on the positioning plate 1, and the pressure block 3 is slidably connected to the clamps 2; the graded driving mechanism has a first stroke for driving the clamps 2 to move radially along the positioning plate 1 and a second stroke for driving the pressure block 3 to move along the clamps 2.

[0034] Specifically, the positioning disk 1 is a part of the turning system, and is generally provided with a plurality of clamps 2 for clamping and fixing the workpiece to be processed. The plurality of clamps 2 can be driven by one driving structure or by a plurality of driving structures respectively, so as to eccentrically clamp or center clamp the workpiece to be processed; after the workpiece to be processed is clamped and fixed, the tool and the positioning disk 1 in the turning system can start feeding by relative rotation to perform turning operation on the workpiece to be processed. The above are all prior arts and will not be described in detail here. The innovation point of the embodiment of the present invention is that a pressing block 3 and a graded driving mechanism are provided on the clamp 2, and the pressing block 3 can force the disc-like (or thinner) workpiece to be processed to fit onto the positioning disk 1 by approaching the positioning disk 1 along the length of the clamp 2; the graded driving mechanism can select two sets of linear driving structures in the prior art, such as hydraulic cylinders or air cylinders, one set of linear driving structures is used to drive the clamp 2 to move along the radial direction of the positioning disk 1, which is the first stroke of the graded driving mechanism, and the other set of linear driving structures is used to drive the pressing block 3 to approach or move away from the positioning disk 1 along the length of the clamp 2, which is the second stroke of the graded driving mechanism. The advantage of such a configuration is that when a disc-like workpiece to be processed is placed between multiple positioning disks 1, the first stroke of the graded driving mechanism can drive the multiple clamps 2 to approach each other to clamp and fix the disc-like workpiece to be processed. When the thickness of the disc is small or the positioning disk 1 is set vertically, the multiple clamps 2 are likely to cause the disc to tilt when clamping it. For this reason, a pressure block 3 structure is set to run a second stroke at the end of the first stroke (that is, after the multiple clamps 2 approach the disc, the pressure block 3 is driven to approach the positioning disk 1 through the second stroke, or the first stroke and the second stroke are synchronously run after the multiple clamps 2 approach the disc), so that the clamps 2 clamp the disc while forcing the disc to fit the positioning disk 1 through the pressure block 3, so that the disc and the positioning disk 1 remain parallel, and the disc is prevented from tilting and affecting the high-precision processing of the turning system.

[0035] An embodiment of the present invention provides a high-precision turning system. When in use, a disc is first placed between a plurality of clamps 2. Subsequently, the plurality of clamps 2 are driven to approach each other radially along a positioning disc 1 through a first stroke of a graded driving mechanism, so as to clamp and fix the disc through the plurality of clamps 2. At the end of the first stroke, the graded driving mechanism switches to a second stroke to drive a pressure block 3 along the clamps 2 to approach the positioning disc 1, thereby forcing the disc to fit onto the positioning disc 1 and be clamped and fixed by the clamps 2, thereby minimizing the disc from being offset or tilted.

[0036] In another embodiment provided by the present invention, further, the positioning disc 1 is provided with a plurality of displacement grooves 4 along its radial direction, and the plurality of clamping jaws 2 are respectively slidably connected in the plurality of displacement grooves 4. Specifically, the positioning disc 1 is overall structured in a disc shape, and the clamping jaws 2 are slidably connected in the displacement grooves 4 to move along the radial direction of the positioning disc 1. When the disc is placed between the plurality of clamping jaws 2, the plurality of clamping jaws 2 are close to each other along the corresponding displacement grooves 4 to clamp and fix the disc.

[0037] Preferably, the grading drive mechanism comprises a driving disk 5 rotatably connected to the positioning disk 1, the driving disk 5 is configured with a plurality of arc grooves 6, and the plurality of clamping jaws 2 are respectively slidably connected in the plurality of arc grooves 6. Specifically, a cavity is configured in the driving disk 5, the plurality of displacement grooves 4 are all connected to the cavity, and the driving disk 5 is rotatably connected to the inner wall of the cavity; the number of arc grooves 6 and displacement grooves 4 corresponds to the number of clamping jaws 2, and the clamping jaws 2 are simultaneously slidably connected in the corresponding displacement grooves 4 and the corresponding arc grooves 6, that is, the clamping jaws 2 are at the virtual intersection of the corresponding displacement grooves 4 and the corresponding arc grooves 6 (the intersection of the vertical projection of the arc grooves 6 and the displacement grooves 4); the portion of the clamping jaws 2 located in the arc grooves 6 is cylindrical to fit the arc grooves 6. The advantage of such an arrangement is that when the driving disk 5 rotates, the projection of the arc groove 6 at the displacement groove 4 moves accordingly, so that the virtual intersection of the two moves along the displacement groove 4. That is, when the driving disk 5 rotates, the inner wall of the arc groove 6 can force the clamping jaws 2 to move along the displacement groove 4, thereby forcing multiple clamping jaws 2 to synchronously approach or move away from each other through multiple arc grooves 6 to center the disc.

[0038] Furthermore, the clamping jaw 2 is constructed with a slide groove 7 along its length, and the pressure block 3 is slidably connected in the slide groove 7. A connecting frame 8 is slidably connected to the positioning plate 1, and a connecting rod 9 is fixed on the pressure block 3, and the connecting rod 9 is limitedly connected to the connecting frame 8. Specifically, the connecting frame 8 is located in the cavity, and is constructed with a plurality of extensions 10, and the plurality of extensions 10 are respectively limitedly connected to the plurality of connecting rods 9, and the inner wall of the cavity is constructed with a plurality of connecting grooves 11 along the axial direction of the positioning plate 1, and the plurality of extensions 10 are respectively slidably connected to the plurality of connecting grooves 11; the clamping jaw 2 simultaneously passes through the displacement groove 4 and the arc groove 6 and extends into the cavity, and the connecting rod 9 is located in the slide groove 7 and extends into the cavity; the extension 10 and the corresponding connecting rod 9 are limitedly connected in a sliding connection, and the extension of the connecting frame 8 can be optionally connected in a sliding connection. The part 10 is provided with an adapting groove 12, and the connecting rod 9 is slidably connected in the adapting groove 12, and the adapting groove 12 corresponds to the displacement groove 4, and the end of the connecting rod 9 away from the pressure block 3 is slidably connected in the adapting groove 12, and when the multiple jaws 2 move along the displacement groove 4, the multiple pressure blocks 3 and the multiple connecting rods 9 move accordingly, so that the connecting rod 9 can slide adaptively in the adapting groove 12, and when the connecting frame 8 moves axially along the positioning disk 1, the multiple extending parts 10 can drive the multiple connecting rods 9 and the multiple pressure blocks 3 to synchronously approach or move away from the positioning disk 1. The advantage of such a setting is that when the jaws 2 move in the displacement groove 4, the connecting rod 9 slides on the corresponding extending part 10, and when the multiple jaws 2 synchronously approach the disk, the connecting frame 8 moves along the connecting groove 11 to drive the multiple pressure blocks 3 to synchronously approach the positioning disk 1, thereby forcing the disk to fit the positioning disk 1 while clamping the disk.

[0039] Preferably, the grading drive mechanism further comprises a screw 13 rotatably connected to the positioning disk 1, and the screw 13 is threadedly connected to the connecting frame 8. Specifically, the screw 13 is rotatably connected to the inner wall of the cavity, the screw 13 and the connecting frame 8 are threadedly connected by a ball screw, and the connecting frame 8 is restricted by a plurality of connecting grooves 11, and can only slide along the connecting grooves 11 but cannot rotate, so that when the screw 13 rotates, it can drive the connecting frame 8 to move along the connecting grooves 11, thereby driving the plurality of pressing blocks 3 to synchronously approach or move away from the positioning disk 1, that is, in this embodiment, two sets of motor structures can be provided to respectively drive the driving disk 5 and the screw 13 to rotate, thereby respectively driving the plurality of clamps 2 and the plurality of pressing blocks 3 to operate.

[0040] In another embodiment provided by the present invention, further, a rotating shaft 14 is constructed on the driving disk 5, and the rotating shaft 14 and the screw 13 are coaxially arranged. Specifically, the driving disk 5 is rotatably connected to the inner wall of the cavity through the rotating shaft 14, and the rotating shaft 14 and the screw 13 can be fixed to each other to be driven by a motor structure, so that a plurality of clamping claws 2 and a plurality of pressing blocks 3 can be driven to operate synchronously through a motor structure to synchronously clamp and fix the disk or synchronously release the fixation of the disk.

[0041] As an alternative to the above-mentioned fixing of the rotating shaft 14 and the screw 13 to each other, further, the grading drive mechanism also includes a driving member 15, the two ends of the driving member 15 are respectively rotatably connected to the rotating shaft 14 and the end of the screw 13, and a movable groove is constructed on the driving member 15, and the ends of the rotating shaft 14 and the screw 13 are both fixed with a transmission gear 16, and the inner wall of the movable groove is rotatably connected with a driving gear 17, and the two transmission gears 16 are both located in the movable groove and are meshed with the driving gear 17. Specifically, the driving member 15 is cylindrical in overall structure, one end of which is sleeved on the rotating shaft 14 and rotatably connected to the rotating shaft 14, and the other end is sleeved on the screw 13 and rotatably connected to the screw 13 (the end of the screw 13 is not provided with a threaded structure), that is, the rotating shaft 14, the rotating member and the screw 13 are coaxially arranged and can rotate relatively in the cavity; there are two transmission gears 16, which are respectively fixed at the opposite ends of the rotating shaft 14 and the screw 13, and the driving gear 17 and the transmission gear 16 are both bevel gears. The driving gear 17 is located between the two transmission gears 16 and meshes with the two transmission gears 16 at the same time; a power source (not shown) for driving the rotating member to rotate is provided in the cavity, which can be a manual or automatic driving structure, preferably a reduction motor driving structure or a worm gear driving structure (this is the prior art and will not be repeated here); when the screw 13 and the rotating shaft 14 rotate in the same direction, the multiple clamping jaws 2 approach each other, and the multiple pressing blocks 3 approach the positioning plate 1.

[0042] When the rotating member rotates, the driving gear 17 rotates with the rotating member. At this time, the driving gear 17 has two states. First, the driving gear 17 does not rotate, and the rotating member drives the two transmission gears 16 to rotate synchronously and in the same direction through the driving gear 17, so as to drive the clamping jaws 2 and the pressing block 3 to clamp and fix the disc synchronously; second, the driving gear 17 rotates, that is, when the rotating member drives the driving gear 17 to rotate, the driving gear 17 rotates on the rotating member. When the clamping jaw 2 hits the outer wall of the disc, the driving gear 17 drives the transmission gear 16 fixed at the end of the rotating shaft 14 to rotate and encounters greater resistance. At this time, the driving gear 17 will rotate with the rotating member and drive another transmission gear 16 (that is, the transmission gear 16 fixed at the end of the screw 13) to rotate. During the process, the driving gear 17 rolls in a circle relative to the non-rotating transmission gear 16 (rotating around the rotating shaft 14 while rotating on its own); on the contrary, when the pressing block 3 hits the disc, the rotating member only drives the rotating shaft 14 to rotate. The advantage of such a configuration is that a rotating member can simultaneously drive the rotating shaft 14 and the screw 13 to rotate synchronously and in the same direction, so as to synchronously drive the clamping jaws 2 and the pressure block 3 to operate. When the clamping jaws 2 (or the pressure block 3) contacts the disc-like workpiece to be clamped, the power source can continue to drive the pressure block 3 (or the clamping jaws 2) to operate until the clamping jaws 2 and the pressure block 3 have completed the contact with the disc, and the disc is clamped to fit on the positioning plate 1, so as to avoid the disc from tilting as much as possible; in this embodiment, after the clamping jaws 2 and the pressure block 3 contact the disc, the power source can continue to operate to drive the clamping jaws 2 and the pressure block 3 to apply pressure to the disc. During this process, the rotating member alternately drives the clamping jaws 2 and the pressure block 3 to operate, so as to force the clamping jaws 2 and the pressure block 3 to alternately apply pressure to the disc (similar to alternately tightening two bolts to fix the structure through a power source), so as to avoid the disc from deflecting as much as possible.

[0043] In another embodiment provided by the present invention, further, the inner wall of the slide groove 7 is constructed with an engaging groove 18, and a locking block 19 is slidably connected in the engaging groove 18. The engaging groove 18 is provided with an elastic member 20 for forcing the locking block 19 to move out of the engaging groove 18 and enter the slide groove 7. Specifically, the slide groove 7 is constructed as an open structure, and the engaging groove 18 extends along the inner wall of the slide groove 7 to the open structure and extends along the length of the slide groove 7 at the open structure. When clamping the disc, the open structures on both sides of the slide groove 7 can fit the outer wall of the disc more closely; an L-shaped rod 21 is fixed to the locking block 19, and the L-shaped rod 21 is located in the engaging groove 18, one end of which is fixed to the locking block 19, and the other end is located in the engaging groove 18 at the open structure, and does not engage with the L-shaped rod when the pressing block 3 slides along the slide groove 7. The elastic member 20 is a spring structure in the prior art, one end of which is fixed on the inner wall of the fitting groove 18, and the other end is fixed on the locking block 19, so that the locking block 19 is forced to move from the fitting groove 18 into the slide groove 7 through the elastic member 20, and at the same time, the L-shaped rod 21 is forced to move out of the fitting groove 18; the fitting groove is located at the top of the slide groove 7, and the locking block 19 is constructed in an arc shape. When the pressure block 3 moves to the top of the slide groove 7 (that is, the end away from the positioning plate 1), the locking block 19 is elastically The locking block 19 is moved into the slide groove 7 under the action of the elastic member 20. At this time, the arc-shaped side wall of the locking block 19 is attached to the outer wall of the connecting rod 9, and the top wall is attached to the bottom of the pressing block 3, so that the position of the pressing block 3 is locked by the locking block 19; when the clamping jaw 2 contacts the outer wall of the disc, the L-shaped rod 21 first contacts the outer wall of the disc, and under the reaction force, the L-shaped rod 21 and the locking block 19 are synchronously received in different positions in the fitting groove 18; when the L-shaped rod 21 is not completely received in the fitting groove 18, the locking block 19 releases the locking block 19. The locking of the pressing block 3 allows the pressing block 3 to be driven close to the positioning disk 1 to force the disc to fit the positioning disk 1. When the clamping jaws 2 clamp the disc, the L-shaped rod 21 is completely received in the fitting groove 18. A wedge-shaped surface 22 is constructed at the bottom of the locking block 19. When the pressing block 3 moves away from the positioning disk 1 along the slide groove 7, the top wall of the locking block 19 contacts the wedge-shaped surface 22 to force the locking block 19 to be received in the fitting groove 18, thereby preventing the locking block 19 from affecting the movement of the pressing block 3 to the end of the slide groove 7 away from the positioning disk 1.

[0044] In the above embodiment, the rotating member can drive the clamping jaws 2 and the pressing block 3 to run synchronously when rotating. Obviously, if the pressing block 3 does not contact the disc but directly contacts the positioning disc 1 during operation, the clamping jaws 2 and the pressing block 3 cannot stably clamp the disc. For this purpose, a locking block 19 and other structures are provided. In the initial state, the clamping jaw 2 is at the end of the displacement groove 4 away from the center of the positioning disk 1, and the pressing block 3 is at the end of the sliding groove 7 away from the positioning disk 1. The locking block 19 moves into the sliding groove 7 under the action of the elastic member 20 to lock the position of the pressing block 3; when the power source drives the rotating member to rotate, the pressing block 3 is locked, and the driving gear 17 cannot drive the transmission gear 16 on the screw 13 to rotate, so that the rotating member can only drive the rotating shaft 14 and the driving disk 5 to rotate, so as to drive multiple clamping jaws 2 to approach each other; after multiple clamping jaws 2 hit the outer wall of the disc, the disc is between the pressing block 3 and the positioning disk 1, and at this time the L-shaped rod 21 is squeezed to drive the locking block 19 into the fitting groove 18, thereby releasing the lock on the pressing block 3, so that when the rotating member rotates, it can simultaneously drive the clamping jaws 2 and the pressing block 3 to approach synchronously and The positioning disk 1 is squeezed until the clamping jaws 2 and the pressing block 3 are both pressed tightly against the disk, and the rotating member stops rotating and maintains the angle to keep the disk clamped and fixed; after the turning of the disk is completed, the power source drives the rotating member to rotate in the opposite direction to drive the clamping jaws 2 and the pressing block 3 to reset. When the clamping jaws 2 are separated from the disk, the corresponding L-shaped rods 21 lose contact, so that the locking block 19 and the L-shaped rod 21 are moved out of the engaging groove 18 again under the action of the elastic member 20. At this time, the locking block 19 is above the pressing block 3. During the resetting process of the locking block 19, the top wall of the locking block 19 contacts the wedge-shaped surface 22 of the locking block 19 to force the locking block 19 to be retracted into the engaging groove 18. Until the pressing block 3 is reset to the end of the slide groove 7 away from the positioning disk 1, the locking block 19 is moved into the slide groove 7 again to lock the pressing block 3 for the convenience of the next operation.

[0045] The advantage of such a configuration is that, by providing a locking block 19 and other structures, when the rotating part rotates, it can first drive the clamping jaw 2 to move to a position close to the disk, and then drive the clamping jaw 2 and the pressure block 3 to synchronously contact the disk, and try to avoid the pressure block 3 directly moving to a position that fits the positioning disk 1, thereby improving the clamping accuracy and trying to avoid the position of the disk from being offset.

[0046] The present invention also provides a high-precision turning method, which is based on any of the above-mentioned high-precision turning systems. The first stroke and the second stroke of the graded driving mechanism can synchronously drive the clamp 2 and the pressure block 3 to operate, so as to force the disc-like workpiece to be processed to be clamped by the clamp 2 when it is in contact with the positioning plate 1, so as to avoid the position displacement or tilt of the disc-like workpiece to be processed as much as possible.

[0047] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-precision turning system, comprising a positioning plate, on which a plurality of clamping claws are arranged, characterized in that: The positioning plate is also provided with: A pressing block slidably connected to the clamping jaw; A graded driving mechanism having a first stroke for driving the clamping jaws to move radially along the positioning plate and a second stroke for driving the pressing block to move along the clamping jaws; The positioning plate is provided with a plurality of displacement grooves along its radial direction, and the plurality of clamping claws are respectively slidably connected in the plurality of displacement grooves; The grading drive mechanism comprises a driving disk rotatably connected to the positioning disk, the driving disk is provided with a plurality of arc grooves, and the plurality of clamping claws are respectively slidably connected in the plurality of arc grooves; a cavity is configured in the driving disk, the plurality of displacement grooves are all connected to the cavity, and the driving disk is rotatably connected to the inner wall of the cavity; The clamping jaw is provided with a slide groove along its length, and the pressing block is slidably connected in the slide groove; The positioning plate is slidably connected with a connecting frame, and a connecting rod is fixed on the pressure block, and the connecting rod is limitedly connected with the connecting frame; the connecting frame is located in the cavity, and is provided with a plurality of extensions, and the inner wall of the cavity is provided with a plurality of connecting grooves along the axial direction of the positioning plate, and the plurality of extensions are respectively slidably connected in the plurality of connecting grooves; the clamping claw simultaneously passes through the displacement groove and the arc groove and extends into the cavity, and the connecting rod is located in the slide groove and extends into the cavity; an adapting groove is configured on the extension portion of the connecting frame, and the connecting rod is slidably connected in the adapting groove, and the adapting groove corresponds to the displacement groove; The grading drive mechanism further comprises a screw rod rotatably connected to the positioning plate, wherein the screw rod is threadedly connected to the connecting frame; a rotating shaft is constructed on the driving plate, and the rotating shaft and the screw rod are coaxially arranged; The grading drive mechanism also includes a driving member, the two ends of which are rotatably connected to the rotating shaft and the end of the screw respectively, a movable groove is constructed on the driving member, the rotating shaft and the end of the screw are both fixed with a transmission gear, the inner wall of the movable groove is rotatably connected with a driving gear, and the two transmission gears are both located in the movable groove and meshed with the driving gear; A driving member can simultaneously drive the rotating shaft and the screw to rotate synchronously and in the same direction, so as to synchronously drive the clamping jaws and the pressing block to operate. When the clamping jaws or the pressing block contacts the disc-like workpiece to be clamped, the power source can continue to drive the pressing block or the clamping jaws to operate until the clamping jaws and the pressing block complete the contact with the disc, and the disc is clamped to fit on the positioning plate. The inner wall of the slide groove is configured with an engaging groove, and a locking block is slidably connected in the engaging groove, and an elastic member is provided in the engaging groove for forcing the locking block to move out of the engaging groove and enter the slide groove; the slide groove is configured as an open structure, and the engaging groove extends along the inner wall of the slide groove to the open structure and extends along the length of the slide groove at the open structure; an L-shaped rod is fixed on the locking block, and the L-shaped rod is located in the engaging groove, one end of which is fixed on the locking block, and the other end is located in the engaging groove at the open structure; the engaging groove is located at the top of the slide groove, and the locking block is configured as an arc. When the pressure block moves to the top of the slide groove, the locking block moves under the action of the elastic member. The locking block is inserted into the sliding groove, at which time the arc-shaped side wall of the locking block is attached to the outer wall of the connecting rod, and the top wall is attached to the bottom of the pressing block, so that the position of the pressing block is locked by the locking block; when the clamping claw contacts the outer wall of the disc, the L-shaped rod first contacts the outer wall of the disc, and under the reaction force, the L-shaped rod and the locking block are synchronously retracted into different positions in the fitting groove, so that the locking block releases the lock on the pressing block, so that the pressing block can be driven close to the positioning disk to force the disc to fit the positioning disk; a wedge-shaped surface is constructed at the bottom of the locking block, and when the pressing block moves away from the positioning disk along the sliding groove, the top wall of the pressing block contacts the wedge-shaped surface to force the locking block to be retracted into the fitting groove.

2. A high-precision turning method, which is based on the high-precision turning system according to claim 1, characterized in that: The first stroke and the second stroke of the graded driving mechanism can synchronously drive the clamping jaws and the pressing block to operate, so as to force the workpiece to be processed to be clamped by the clamping jaws when it is in contact with the positioning plate.

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