Rotary clamps for workpiece machining

Abstract

The present invention discloses a rotary clamp for workpiece processing, which belongs to the technical field of machining machine tools, and includes a clamping component and a rotating driving component. The clamping component includes a chuck, and two symmetrical first clamping blocks and two symmetrical second clamping blocks are cross-distributed on the top of the chuck. A first driving seat and a second driving seat are installed inside the chuck, and the first driving seat drives the first clamping blocks to approach each other, and the second driving seat drives the second clamping blocks to approach each other; the second driving seat is installed inside the chuck through a sliding connection; the clamping component also includes a driving connection seat, and the chuck is slidably connected to the driving connection seat and fixed by a first locking mechanism, and the movable direction of the chuck is consistent with the movable direction of the second clamping block. The present invention realizes stable clamping of non-completely symmetrical workpieces through a group of movable clamping blocks.

Description

Technical Field

[0001] The invention relates to the technical field of machining machine tools, in particular to a rotary clamp for machining workpieces. Background Art

[0002] When using a machine tool to perform profiling or grinding on a workpiece, a fixture is needed to fix the workpiece. A rotary fixture is a type of fixture that can not only quickly clamp the workpiece, but also drive the workpiece to rotate for the corresponding processing operation. The clamping mechanism is the core part of the fixture, responsible for stably clamping the workpiece, and it is necessary to ensure that the clamping force is evenly distributed on the workpiece to avoid deformation of the workpiece or excessive stress on the fixture due to uneven clamping force.

[0003] Traditional clamps are designed with two clamping modes: synchronous clamping and independent clamping based on application scenarios and design requirements. The difference between these two modes lies in the movement mode used by the clamps. When using synchronous clamping, all jaws can move at the same time, thereby ensuring that the workpiece is clamped evenly and stably to prevent offset or deformation during processing or movement. For some incompletely symmetrical workpieces, for example, the cross-section of the workpiece is symmetrical on only two sides and the other two sides are asymmetrical, then the clamps need to move independently to adapt to the shape and size of the workpiece.

[0004] Although synchronous clamping can ensure that the workpiece is subjected to uniform force, it cannot clamp non-completely symmetrical workpieces. Although independent clamping can clamp non-completely symmetrical workpieces, it requires a large number of sensors to ensure that the contact force between each clamping jaw and the workpiece is the same to ensure that the workpiece is subjected to uniform force. The cost of use is high. In addition, since the workpiece has a non-completely symmetrical structure, its center will also be offset, which will affect the stability during rotation after clamping. Therefore, traditional clamps still have defects in clamping non-completely symmetrical workpieces. Summary of the invention

[0005] The purpose of the present invention is to provide a rotary clamp for workpiece processing in order to solve the problem that the above-mentioned clamp cannot effectively solve the problem that the force on the non-completely symmetrical workpiece is uneven and unstable when it is clamped. The rotary clamp adopts a group of fixed clamping blocks and a group of movable clamping blocks to make the force on the workpiece more uniform and also meet the advantage of stable clamping of non-completely symmetrical workpieces.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A rotary clamp for workpiece processing, comprising a clamping component and a rotary driving component, wherein the clamping component comprises a chuck, and two symmetrical first clamping blocks and two symmetrical second clamping blocks are cross-distributed on the top of the chuck, and a first driving seat and a second driving seat are installed inside the chuck, wherein the first driving seat drives the first clamping blocks to approach each other, and the second driving seat drives the second clamping blocks to approach each other;

[0008] The second drive seat is installed inside the chuck through a sliding connection, so that the second clamping block and the second drive seat can move synchronously relative to the chuck;

[0009] The clamping component also includes a drive connection seat, through which the chuck is connected to the rotation drive component. The chuck and the drive connection seat are slidably connected and fixed by a first locking mechanism. The movable direction of the chuck is consistent with the movable direction of the second clamp.

[0010] Preferably, the first locking mechanism includes an adjusting screw and a guide plate, the adjusting screw is arranged on both sides of the driving connecting seat, the guide plate is installed on both sides of the bottom end of the chuck, a screw hole is opened on the guide plate, the adjusting screw vertically passes through the guide plate through the screw hole, and an adjusting nut is installed on the outer wall of one end of the guide plate.

[0011] Preferably, a bolt through hole is provided along the side of the guide plate in the direction of the screw hole, the bolt through hole is connected with the screw hole, and a reinforcing bolt is installed in the bolt through hole.

[0012] Preferably, the chuck has an internal fixed slide rail, and the guide plate extends to the interior of the chuck and is respectively connected to both ends of the slide rail. One end of the sliding connector is fixed to the second drive seat, and the other end is connected to the slider. The slider moves along the length direction of the slide rail and is fixed by a second locking mechanism.

[0013] Preferably, the second locking mechanism includes a clamping plate and a locking push rod arranged in the slide rail, the clamping plate is provided with two tracks parallel to both sides of the slide rail, an adjustable clamping groove for clamping the slider is formed between the clamping plate and the tracks, one end of the locking push rod is connected to the clamping plate through two supporting arms, the connection between the supporting arm and the locking push rod and the clamping plate is a hinged structure, moving the locking push rod changes the angle between the two supporting arms so that the spacing of the adjustable clamping grooves changes.

[0014] Preferably, a guide groove is provided in the slide rail along the moving direction of the clamp plate, the clamp plate is slidably connected to the guide groove, a guide seat is provided in the slide rail along the moving direction of the locking push rod, and the locking push rod is slidably connected to the guide seat.

[0015] Preferably, a locking push plate is installed at the other end of the locking push rod, and the locking push plate is arranged on the side of the guide plate away from the slide rail. A screw hole is also provided on the locking push plate for the adjustment screw to pass through. The locking push plate and the guide plate are squeezed into fit by adjusting the nut. A reset spring is also installed on the locking push rod for resetting the locking push rod after movement.

[0016] Preferably, the first driving seat and the second driving seat are arranged in layers, the size of the first driving seat is larger than that of the second driving seat, and the first driving seat is fixed on the inner wall of the chuck.

[0017] Preferably, the first driving seat and the second driving seat both include a movable seat for installing a clamping block, the movable seat is installed on the surface of the turntable, the turntable is rotatably installed on the base through a bearing, a thread groove is arranged at the bottom of the movable seat, thread teeth matching the thread groove are arranged on the surface of the turntable, a gear groove is arranged on the other side of the turntable, and a driving gear meshing with the gear groove is installed on the base.

[0018] Preferably, the driving gear is connected to the output end of the motor or to an external hand crank.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting a fixed group of first clamping blocks and a movable group of second clamping blocks, the second clamping blocks can be moved to a suitable position to clamp the workpiece when the workpiece is fixed by the first clamping blocks. This is suitable for stable clamping of workpieces with asymmetrical two sides. Moreover, each group of clamping blocks adopts a symmetrical synchronous drive method, so that the extrusion force of the clamping blocks in the same group when in contact with the workpiece is the same, so that the two sides of the workpiece are evenly stressed and not easily damaged during rotation processing. The fixture not only includes the movement of the second clamping block, but also the movement of the chuck as a whole, so that the center of the workpiece and the driving axis of the rotating drive component can be adjusted to be on the same axis, so that the rotation processing is stable and the workpiece is not easily damaged.

[0021] 2. The movement of the clamp in the present invention is locked and fixed by the first locking mechanism, and the movement of the second clamp is locked and fixed by the second locking mechanism, which not only meets the convenience of movement and adjustment, but also takes into account the stability of the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the rotary clamp of the present invention;

[0023] Figure 2 It is a schematic diagram of the composition structure of the clamping component of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the first clamping block and the second clamping block of the present invention holding an asymmetric workpiece.

[0025] Figure 4 It is a schematic diagram of the initial state of the clamping component of the present invention.

[0026] Figure 5 It is a schematic diagram of the second clamping state of the clamping component of the present invention.

[0027] Figure 6 It is a schematic diagram of the third clamping state of the clamping component of the present invention.

[0028] Figure 7 It is a schematic structural diagram of the first locking mechanism of the present invention.

[0029] Figure 8 It is a top view of the second locking mechanism structure of the present invention.

[0030] Fig. 9 This is a front view of the second locking mechanism structure of the present invention.

[0031] Fig.10 It is a schematic diagram of the first driving seat and the second driving seat of the same structure of the present invention.

[0032] In the figure: 1. Clamping component, 2. Rotating driving component, 3. Chuck, 4. Driving connecting seat, 5. First clamping block, 6. Second clamping block, 7. First driving seat, 8. Second driving seat, 9. Sliding connecting member, 10. Base, 11. Turntable, 12. Gear groove, 13. Driving gear, 14. Thread groove, 15. Moving seat, 16. Thread tooth, 17. Moving groove, 18. Asymmetric workpiece, 19. Slide rail, 20. Slider, 21. Guide plate, 22. Adjusting screw, 23. Adjusting nut, 24. Strengthening bolt, 25. Bolt through hole, 26. Locking push plate, 27. Screw hole, 28. Locking push rod, 29. Guide seat, 30. Reset spring, 31. Support arm, 32. Clamp plate, 33. Guide groove. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] like Figure 1 As shown, a rotary clamp for workpiece processing is disclosed, including a clamping component 1 and a rotary driving component 2. The clamping component 1 is used to clamp and fix the workpiece, and the rotary driving component 2 is used to drive the clamping component 1 to rotate. The driving rotary component 2 can be composed of a motor, a reducer and a transmission mechanism. The driving rotary component 2 belongs to a conventional setting, so the working principle of the driving rotary component 2 is not repeated.

[0035] The clamping component 1 is an important part of the clamp. Figure 2As shown, the clamping component 1 includes a chuck 3, on the top of which are cross-distributed two symmetrical first clamping blocks 5 and two symmetrical second clamping blocks 6. A first driving seat 7 and a second driving seat 8 are installed inside the chuck 3. The first driving seat 7 drives the first clamping blocks 5 to approach each other, and the second driving seat 8 drives the second clamping blocks 6 to approach each other. The first clamping blocks 5 and the second clamping blocks 6 are approached to each other. The workpiece is clamped in four directions by the mutual approach of the first clamping blocks 5 and the mutual approach of the second clamping blocks 6. The first driving seat 7 and the second driving seat 8 drive the first clamping blocks 5 and the second clamping blocks 6 respectively. The clamping component 1 thus formed has the effect that the clamping blocks of the same group are synchronously clamped and the clamping blocks of different groups are independently clamped, so that the extrusion force applied to the surface of the workpiece by the clamping blocks in each group is the same when clamping, and the two groups are relatively independent clamping. This can also be used for the clamping of some non-completely symmetrical workpieces. If you want to clamp the workpiece with completely uniform clamping force in this way, you only need to install a pressure sensor on one of the clamping blocks in each group. Using two pressure sensors, you can adjust the clamping forces of the four clamping blocks to remain consistent, saving the use cost.

[0036] According to the first clamping block 5 and the second clamping block 6 mentioned above, only the workpiece with four sides that are not completely symmetrical but two sides that are symmetrical in structure can be clamped. Figure 3 The asymmetric workpiece 18 shown in the figure is symmetrical in the top and bottom, but asymmetric in the left and right. Such a structure also needs to ensure that any one of the first clamping block 5 and the second clamping block 6 can move in order to stably contact the surface of the asymmetric workpiece 18. Therefore, the second drive seat 8 is installed inside the chuck 3 through the sliding connection 9, so that the second clamping block 6 and the second drive seat 8 can move synchronously relative to the chuck 3. Here, the second clamping block 6 is set to a movable structure, so that when clamping the workpiece, the position of the second clamping block 6 can be adjusted to enable it to stably clamp the asymmetric workpiece 18. The effect diagram of clamping the workpiece is shown in FIG. Figure 3 As shown in the figure, the first clamping block 5 is arranged vertically, and the second clamping block 6 is arranged horizontally, and the asymmetric workpiece 18 is clamped in the middle. It can be seen from the figure that when the asymmetric workpiece 18 is clamped, the first clamping block 5 and the first driving seat 7 are fixed relative to the chuck 3 and do not move, while the second clamping block 6 and the second driving seat 8 are offset to the right side relative to the chuck 3 as a whole. It is because of this offset that the second clamping block 6 can ensure that the left and right sides of the asymmetric workpiece 18 are stably clamped. Figure 3 In the embodiment, four moving grooves 17 are also arranged on the top end surface of the clamp 3 to provide guidance for the first clamping block 5 and the second clamping block 6 when they move.

[0037] exist Figure 3It can be seen that due to the asymmetric structure of the left and right sides of the asymmetric workpiece 18, the second clamping block 6 is offset to the right as a whole relative to the chuck 3. At this time, the center of the asymmetric workpiece 18 is not at the midpoint of the intersection of the first clamping block 5 and the second clamping block 6. In this way, when the chuck 3 is driven by the rotating driving component 2 to rotate with the center of the chuck 3 itself as the axis, the asymmetric workpiece 18 cannot rotate around the center, which will affect the processing. Therefore, it is necessary to adjust the position of the chuck 3. The clamping component 1 also includes a drive connecting seat 4, which is used to connect the chuck 3 to the rotating driving component 2 through the drive connecting seat 4. The chuck 3 is connected to the drive connecting seat 4. The connecting seats 4 are slidably connected and fixed by a first locking mechanism. The movable direction of the chuck 3 is consistent with the movable direction of the second clamp 6. The driving connecting seat 4 is connected to the driving shaft of the rotating driving component 2. Therefore, the chuck 3 can be translated relative to the driving connecting seat 4. Because the driving connecting seat 4 and the driving shaft are fixedly connected, when the chuck 3 moves, the center of the asymmetric workpiece 18 can be adjusted to be on the same axis as the driving shaft. At this time, when the clamping component 1 rotates, the asymmetric workpiece 18 also rotates in a circle with its own center, thereby improving the stability during processing. The first locking mechanism is used to lock the chuck 3 after it moves.

[0038] Specific movement method reference Figure 4 , Figure 5 and Figure 6 , Figure 4 FIG. 1 is a schematic diagram of the clamping component 1 in the initial state. In the figure, the midpoint between the two second clamping blocks 6, the central axis of the clamping head 3 and the central axis of the driving connection seat 4 are all on the axis A, and the three are coaxial. At this time, an asymmetric workpiece 18 is added, and the clamping component 1 enters the second state, as shown in FIG. Figure 5 As shown, since the two sides of the asymmetric workpiece 18 clamped by the second clamping block 6 are asymmetric structures, the second clamping block 6 needs to be offset to the left to clamp the two sides of the asymmetric workpiece 18 when clamping. At this time, the center of the asymmetric workpiece 18 and the midpoint between the two second clamping blocks 6 are both on the axis B, and the axis B is located on the left side of the axis A. The central axis of the driving connecting seat 4 is still at the position of the axis A. In this state, if the clamping component 1 rotates, it rotates about the axis A, which cannot rotate according to the center of the asymmetric workpiece 18 and cannot meet the processing requirements. At this time, the position of the chuck 3 needs to be adjusted to enter the third state, such as Figure 6 As shown, the chuck 3 is moved rightward as a whole relative to the drive connection seat 4 so that the axis B coincides with the axis A. At this time, when the clamping component 1 rotates, it can ensure that the asymmetric workpiece 18 rotates with its own center as the center of the circle.

[0039] According to the above, it can be known that the first locking mechanism is used to lock and fix the chuck 3 so that the chuck 3 and the drive connection seat 4 form a whole, so as to ensure the overall rotation of the clamping component 1. Figure 7As shown, the first locking mechanism includes an adjusting screw 22 and a guide plate 21. The adjusting screw 22 is arranged on both sides of the drive connecting seat 4, and the guide plates 21 are installed on both sides of the bottom end of the chuck 3. A screw hole 27 is opened on the guide plate 21. The adjusting screw 22 vertically passes through the guide plate 21 through the screw hole 27, and an adjusting nut 23 is installed on the outer wall of one end of the guide plate 21. The guide plate 21 on the chuck 3 can move on the adjusting screw 22. Guide plates 21 are arranged on both sides of the chuck 3. In this way, the guide plate 21 is clamped by tightening the adjusting nut 23 on the outer side of the guide plate 21, so as to fix the chuck 3 and the drive connecting seat 4. In this way, when the chuck 3 needs to be moved, only the adjusting nut 23 on one side needs to be tightened, and the adjusting nut 23 on the other side needs to be loosened, so that the chuck 3 can move in the direction of the loosened adjusting nut 23. The chuck 3 can be fixed transversely in the above manner. When the chuck 3 is working in the clamping part 1, it is necessary to ensure that it is integrated with the drive connecting seat 4. It is obviously not strong enough to realize the longitudinal fixation of the chuck 3 and the drive connecting seat 4 only by the screw hole 27 on the guide plate 21 and the adjusting screw 22. It is also necessary to add a reinforcing bolt 24 to reinforce the connection between the chuck 3 and the drive connecting seat 4. Figure 7 As shown, a bolt through hole 25 is provided on the side of the guide plate 21 in the direction of the screw hole 27, the bolt through hole 25 is connected with the screw hole 27, and a reinforcing bolt 24 is installed in the bolt through hole 25. The reinforcing bolt 24 is driven into the position perpendicular to the screw hole 27, so that the end of the reinforcing bolt 24 squeezes the adjusting screw 22, and the guide plate 21 and the adjusting screw 22 are tightly reinforced, thereby improving the stability of the chuck 3 and the driving connection seat 4 as a whole.

[0040] As mentioned above, the sliding connection 9 is used to facilitate the movement of the second clamping block 6 and the second driving seat 8. The internal fixed slide rail 19 of the chuck 3, and the guide plate 21 extends to the inside of the chuck 3 and is respectively connected to the two ends of the slide rail 19. One end of the sliding connection 9 is fixed to the second driving seat 8, and the other end is connected to the slider 20. The slider 20 moves along the length direction of the slide rail 19 and is fixed by the second locking mechanism. The sliding connection 9 moves relative to the slide rail 19 set in the chuck 3 through the slider 20 at the bottom end, so as to realize the relative movement of the second clamping block 6, the second driving seat 8 and the chuck 3. Although the chuck 3 and the driving connection seat 4 rotate as a whole when the clamping component 1 is working, in order to ensure the stability of the clamping of the second clamping block 6 and the workpiece, it is also necessary to add a second locking mechanism to lock and fix the sliding connection 9 after moving, so as to realize the fixation of the second clamping block 6 and the second driving seat 8 after moving.

[0041] like Figure 8As shown, the sliding connection member 9 is fixed by using a fixed slider 20, and the second locking mechanism includes a clamping plate 32 and a locking push rod 28 arranged in the slide rail 19. The clamping plate 32 is provided with two tracks parallel to the two sides of the slide rail 19, and an adjustable clamping groove for clamping the slider 20 is formed between the clamping plate 32 and the tracks. One end of the locking push rod 28 is respectively connected to the clamping plate 32 through two supporting arms 31, and the connection between the supporting arm 31 and the locking push rod 28 and the clamping plate 32 is a hinge structure. Moving the locking push rod 28 changes the angle between the two supporting arms 31 so that the spacing of the adjustable clamping grooves is changed. The two clamping plates 32 are arranged on the inner side of the slide rail 19, and an adjustable clamping groove is formed between the clamping plate 32 and the tracks. The slider 20 can be moved on the adjustable clamping groove. Due to the action of the support arm 31, when the locking push rod 28 is pushed forward, the support arm 31 gradually approaches to be perpendicular to the clamping plate 32. At this time, the groove spacing of the adjustable clamping groove becomes smaller, and the slider 20 can be firmly clamped, thereby fixing the slider 20. Similarly, when the locking push rod 28 moves backward, the support arm 31 tilts and pulls the clamping plate 32 off the track. In this way, the groove spacing of the adjustable clamping groove becomes larger, and the slider 20 can resume the moving state. The second locking mechanism can be used to clamp the slider 20 when it needs to be fixed, and to loosen the slider 20 when it does not need to be fixed, so that it is convenient to adjust according to needs. Since both the splint 32 and the locking push rod 28 need to move laterally in the slide rail 19, a guide groove 33 is set in the slide rail 19 along the moving direction of the splint 32, the splint 32 is slidably connected to the guide groove 33, and a guide seat 29 is set in the slide rail 19 along the moving direction of the locking push rod 28, the locking push rod 28 is slidably connected to the guide seat 29, the guide groove 33 serves to improve the moving stability of the splint 32, and the guide seat 29 serves to improve the pushing and pulling stability of the locking push rod 28.

[0042] Generally, in order to prevent dust from entering the chuck 3 and affecting the service life of the parts in the chuck 3, the chuck 3 is usually not designed to be too open, and the slide rail 19, the slider 20 and the second locking mechanism are all inside the chuck 3, so the second locking mechanism is not convenient for manual operation. Fig. 9As shown, the driving component of the second locking mechanism is arranged on the outside of the chuck 3, which not only ensures that the chuck 3 will not be too open, but also satisfies the manual adjustment of the second locking mechanism. The other end of the locking push rod 28 is installed with a locking push plate 26, and the locking push plate 26 is arranged on the side of the guide plate 21 away from the slide rail 19. The locking push plate 26 also has a screw hole 27 for the adjustment screw 22 to pass through. The locking push plate 26 and the guide plate 21 are pressed by adjusting the nut 23. The locking push rod 28 is also equipped with a reset spring 30 for resetting the locking push rod 28 after it moves. The locking push plate 26 is used to push and pull the locking push rod 28, and the locking push plate 26 extends out of the chuck 3 close to the guide plate 21. As mentioned above, the guide plate 21 plays the role of locking and fixing the chuck 3. There is an adjustment nut 23 that squeezes the guide plate 21, and the locking push plate 26 is also provided with a screw hole 27 for the adjusting screw 22 to pass through, so that the locking push plate 26 and the guide plate 21 can be clamped together by a locking nut 23. The locking push plate 26 is tightened by tightening the locking nut 23 to push the locking push rod 28 forward so that the slider 20 is fixed. The movement and fixation of the slider 20 can be directly controlled from the outside. The addition of a reset spring 30 can allow the locking push rod 28 to automatically retreat when the locking nut 23 is loosened, thereby releasing the locked state of the slider 20 and increasing the convenience of operating the second locking mechanism.

[0043] like Figure 2 As shown, the first drive seat 7 and the second drive seat 8 are arranged in layers, the size of the first drive seat 7 is larger than that of the second drive seat 8, the first drive seat 7 is fixed on the inner wall of the chuck 3, and the small-sized second drive seat 8 can be easily moved. The first drive seat 7 and the second drive seat 8 are layered, which also provides sufficient space for the second drive seat 8 to move without increasing the volume of the entire chuck.

[0044] like Fig.10As shown, the first driving seat 7 and the second driving seat 8 both include a moving seat 15 for mounting a clamping block, the moving seat 15 is mounted on the surface of a turntable 11, the turntable 11 is rotatably mounted on the base 10 through a bearing, a thread groove 14 is arranged at the bottom of the moving seat 15, a thread tooth 16 matching the thread groove 14 is arranged on the surface of the turntable 11, a gear groove 12 is arranged on the other side of the turntable 11, a driving gear 13 meshing with the gear groove 12 is installed on the base 10, the first driving seat 7 and the second driving seat 8 have completely the same structure, and a gear assembly is used to realize the relative movement of the clamping block at a uniform speed. Control, since the turntable 11 is installed on the base 10 through a bearing, the turntable 11 can rotate relative to the base 10, and the way to drive the turntable 11 to rotate is to use the driving gear 13 to engage with the gear groove 12 to rotate the turntable 11, and the moving seat 15 is also matched with the thread teeth 16 on the turntable 11 through the thread groove 14. When the turntable 11 rotates, the moving seat 15 is driven to move linearly to achieve the relative approach and principle of the same group of clamps. This driving method is the same as the clamping jaw driving method on the traditional chuck, so it will not be described in detail.

[0045] According to the above, the first drive seat 7 and the second drive seat 8 are both powered by the drive gear 13, so the drive gear 13 requires an external energy supply device. The drive gear 13 is connected to the output end of the motor or to an external hand crank. Whether it is automatically driven by the motor or manually driven by the hand crank, the intention is to ensure the rotation of the drive gear 13. These two methods can be selected according to the application scenario, and we will not analyze the specific application scenarios in detail here.

[0046] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rotary clamp for workpiece processing, comprising a clamping component (1) and a rotary driving component (2), characterized in that: The clamping component (1) comprises a clamping head (3), on the top of which two first clamping blocks (5) and two second clamping blocks (6) are arranged in a cross-distributed manner in a symmetrical manner, and a first driving seat (7) and a second driving seat (8) are installed inside the clamping head (3), wherein the first driving seat (7) drives the first clamping blocks (5) to move closer to each other, and the second driving seat (8) drives the second clamping blocks (6) to move closer to each other; The second drive seat (8) is installed inside the chuck (3) via a sliding connection (9), and the second clamping block (6) and the second drive seat (8) can move synchronously relative to the chuck (3); The clamping component (1) further comprises a drive connection seat (4), the clamping head (3) is connected to the rotation driving component (2) via the drive connection seat (4), the clamping head (3) and the drive connection seat (4) are slidably connected and fixed via a first locking mechanism, and the movable direction of the clamping head (3) is consistent with the movable direction of the second clamping block (6); The first drive seat (7) and the second drive seat (8) are arranged in layers, the size of the first drive seat (7) is larger than the size of the second drive seat (8), and the first drive seat (7) is fixed on the inner wall of the clamp (3); the first drive seat (7) and the second drive seat (8) both include a movable seat (15) for mounting a clamping block, the movable seat (15) is mounted on the surface of a turntable (11), the turntable (11) is rotatably mounted on the base (10) via a bearing, a thread groove (14) is arranged at the bottom of the movable seat (15), a thread tooth (16) matching the thread groove (14) is arranged on the surface of the turntable (11), a gear groove (12) is arranged on the other side of the turntable (11), and a driving gear (13) meshing with the gear groove (12) is installed on the base (10).

2. The rotary clamp for workpiece processing according to claim 1, characterized in that: The first locking mechanism comprises an adjusting screw (22) and a guide plate (21), wherein the adjusting screw (22) is arranged on both sides of the driving connection seat (4), and the guide plate (21) is installed on both sides of the bottom end of the chuck (3), and a screw hole (27) is provided on the guide plate (21), and the adjusting screw (22) vertically penetrates the guide plate (21) through the screw hole (27), and an adjusting nut (23) is installed on the outer wall of one end of the guide plate (21).

3. The rotary clamp for workpiece processing according to claim 2, characterized in that: A bolt through hole (25) is provided on the guide plate (21) along the side edge in the direction of the screw hole (27), the bolt through hole (25) is communicated with the screw hole (27), and a reinforcing bolt (24) is installed in the bolt through hole (25).

4. The rotary clamp for workpiece processing according to claim 2, characterized in that: The slide rail (19) is fixed inside the chuck (3), and the guide plate (21) extends into the interior of the chuck (3) and is respectively connected to both ends of the slide rail (19). One end of the sliding connector (9) is fixed to the second drive seat (8), and the other end is connected to the slide block (20). The slide block (20) moves along the length direction of the slide rail (19) and is fixed by a second locking mechanism.

5. The rotary clamp for workpiece processing according to claim 4, characterized in that: The second locking mechanism comprises a clamping plate (32) and a locking push rod (28) arranged in the slide rail (19); the clamping plate (32) is provided with two tracks parallel to the two sides of the slide rail (19); an adjustable clamping groove for clamping the slider (20) is formed between the clamping plate (32) and the tracks; one end of the locking push rod (28) is respectively connected to the clamping plate (32) via two support arms (31); the connection between the support arm (31), the locking push rod (28) and the clamping plate (32) are all hinged structures; moving the locking push rod (28) changes the angle between the two support arms (31) so that the spacing of the adjustable clamping grooves is changed.

6. The rotary clamp for workpiece processing according to claim 5, characterized in that: A guide groove (33) is arranged in the slide rail (19) along the moving direction of the clamping plate (32), the clamping plate (32) and the guide groove (33) are slidably connected, and a guide seat (29) is arranged in the slide rail (19) along the moving direction of the locking push rod (28), the locking push rod (28) and the guide seat (29) are slidably connected.

7. The rotary clamp for workpiece processing according to claim 5, characterized in that: The other end of the locking push rod (28) is installed with a locking push plate (26), which is arranged on the side of the guide plate (21) away from the slide rail (19). The locking push plate (26) is also provided with a screw hole (27) for the adjustment screw (22) to pass through. The locking push plate (26) and the guide plate (21) are fitted together by squeezing the adjusting nut (23). The locking push rod (28) is also installed with a reset spring (30) for resetting the locking push rod (28) after movement.

8. The rotary clamp for workpiece processing according to claim 1, characterized in that: The driving gear (13) is connected to the output end of the motor or to an external hand crank.

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