A rotary clamping device for multi-station machining

Abstract

A rotary clamping device for multi-station machining includes a hydraulic parallel jaw. An upper actuating component of the hydraulic parallel jaw has an upper shaft seat, and a lower actuating component has a lower shaft seat. The upper shaft seat has a matching upper rotating mechanism. Below the upper rotating mechanism is an upper clamping block. The lower end face of the upper clamping block has an upper clamping groove. The lower shaft seat has a matching lower rotating mechanism. Above the lower rotating mechanism is a lower clamping block, and its upper surface has a lower clamping groove opposite to the upper clamping groove. The lower rotating mechanism includes a lower rotating shaft. The lower end of the lower rotating shaft has a driven gear. The lower end of the driven gear has a locking disc. This rotary clamping device for multi-station machining effectively avoids the impact of multiple clamping operations on machining accuracy, effectively ensuring machining quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of processing equipment technology, and in particular to a rotary clamping device for multi-station processing. Background Technology

[0002] In automated machining, hydraulic grippers, such as parallel grippers, are often used to hold workpieces for milling, drilling, or tapping.

[0003] In actual machining, when a workpiece is clamped using a hydraulic parallel gripper, the gripper body and its connected components such as the bearing and oil line connector occupy the space behind the workpiece. In vertical or horizontal machining centers, the cutting tool usually approaches the workpiece horizontally, such as from the front or left and right sides. However, due to the obstruction of the gripper body, the cutting tool cannot enter the area opposite the workpiece to the hydraulic parallel gripper for machining. When a workpiece has four machining surfaces that need to be machined, traditional fixed grippers can only machine the front, left, and right surfaces first. The rear surface must be removed, rotated, and re-clamped before machining. This machining method requires multiple clamping operations, and the accumulated positioning error from these multiple clamping operations will seriously affect the machining accuracy. Furthermore, each clamping operation wastes a lot of time, ultimately affecting the overall machining efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a rotary clamping device for multi-station machining, which can effectively avoid the situation that multiple clamping affects the machining accuracy, and effectively ensure the machining quality and machining efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention discloses a rotary clamping device for multi-station machining, comprising a hydraulic parallel gripper. An upper shaft seat is provided on the upper actuator of the hydraulic parallel gripper, and a lower shaft seat is provided on the lower actuator. An upper rotating mechanism is provided on the upper shaft seat. An upper clamping block is provided below the upper rotating mechanism. An upper clamping groove is provided on the lower end face of the upper clamping block. A lower rotating mechanism is provided on the lower shaft seat. A lower clamping block is provided above the lower rotating mechanism, and a lower clamping groove is provided on the upper surface of the lower clamping block, corresponding to the upper clamping groove. The lower rotating mechanism includes a lower rotating shaft. A driven gear is provided at the lower end of the lower rotating shaft. A locking disc is provided at the lower end of the driven gear. A locking mechanism matching the locking disc is provided at the lower end of the lower shaft seat. An angle adjustment mechanism is provided at the rear of the lower shaft seat. The angle adjustment mechanism includes a drive shaft, and several drive teeth meshing with the driven gear are provided on the front side wall of the drive shaft.

[0007] The lower rotating mechanism also includes a first bearing groove on the upper surface of the lower shaft seat; a rotating hole is provided at the center of the bottom of the first bearing groove, and the lower rotating shaft is located in the rotating hole; a first limiting cover in an annular shape is provided on the upper surface of the lower shaft seat, and the first limiting cover is sleeved on the lower rotating shaft; a plurality of first bearings axially sleeved on the lower rotating shaft are provided between the lower surface of the first limiting cover and the bottom of the first bearing groove.

[0008] The lower surface of the first limiting cover is in contact with the upper end face of the outer ring of the uppermost first bearing, and the bottom of the first bearing groove is in contact with the lower end face of the outer ring of the lowermost first bearing; the upper part of the lower rotating shaft has a first limiting step in the shape of an annular shape; the upper end face of the inner ring of the uppermost first bearing is in contact with the first limiting step; the lower end of the lower rotating shaft is screwed with a first limiting sleeve; the outer wall of the first limiting sleeve is provided with a first limiting hole that communicates with its internal space; the lower end face of the inner ring of the lowermost first bearing is in contact with the upper surface of the first limiting sleeve.

[0009] The locking mechanism includes a lifting hole on the lower surface of the lower shaft seat, which is coaxial with the rotating hole; the lower end of the rotating hole is connected to the center of the bottom of the lifting hole; a mounting seat is provided on the lower surface of the lower shaft seat; a matching hydraulic cylinder is provided on the mounting seat; a lifting plate located inside the lifting hole is provided at the upper end of the piston rod of the hydraulic cylinder; a plurality of locking blocks are provided on the upper surface of the lifting plate in a circumferentially evenly distributed manner; a locking ring is provided at the bottom of the lifting hole outside the locking plate; a plurality of guide posts are provided between the lower surface of the locking ring and the upper surface of the mounting seat in a circumferentially evenly distributed manner; a plurality of guide holes matching the guide posts are provided on the lifting plate; a plurality of first locking grooves matching the inner ends of the locking blocks are provided on the lower surface of the locking plate; a plurality of second locking grooves matching the outer ends of the locking blocks are provided on the lower surface of the locking ring.

[0010] The angle adjustment mechanism also includes a shaft hole that matches the drive shaft, with the front side of the shaft hole communicating with the rotating hole; both the left and right side walls of the lower shaft seat are provided with positioning holes coaxial with the shaft hole; a guide sleeve fitted onto the drive shaft is provided in the positioning hole; a waist-shaped hole is provided on the rear side wall of the drive shaft; a hidden groove is provided on the rear side wall of the lower shaft seat; a screw hole communicating with the shaft hole is provided at the center of the bottom of the hidden groove; a guide screw is screwed into the screw hole, with the head of the guide screw located in the hidden groove and the inner end of the guide screw inserted into the waist-shaped hole.

[0011] The upper rotating mechanism includes a second bearing groove on the lower surface of the upper shaft seat; a movable hole is provided at the center of the bottom of the second bearing groove; an upper rotating shaft coaxial with the second bearing groove is provided in the second bearing groove; a second limiting cover in an annular shape is provided on the lower surface of the upper shaft seat, and the second limiting cover is sleeved on the upper rotating shaft; a plurality of second bearings axially sleeved on the upper rotating shaft are provided in the second bearing groove; the outer ring of the second bearing is located between the upper surface of the second limiting cover and the second bearing groove; a second limiting sleeve located in the movable hole is screwed to the upper end of the upper rotating shaft; a second limiting hole communicating with its internal space is provided on the outer wall of the second limiting sleeve; a second limiting step in an annular shape is provided at the lower part of the upper rotating shaft, and the inner ring of the second bearing is located between the second limiting step and the lower surface of the second limiting sleeve.

[0012] The present invention has the following beneficial effects:

[0013] Compared with the prior art, the rotary clamping device for multi-station machining using the structure of this invention only requires pushing the drive shaft to rotate the workpiece by rotating the driven gear. The rear side, which was originally blocked by the hydraulic parallel jaw body, is rotated to the front, left, or right machined area. The front, left, right, and rear sides can be machined sequentially without disassembling the workpiece. This eliminates the need for secondary clamping due to rear side interference at the source, effectively eliminates the cumulative error of multiple clamping and positioning, ensures machining accuracy, and thus ensures machining quality. Furthermore, since the workpiece does not need to be disassembled, a lot of time is saved, which can effectively ensure machining efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the rotary clamping device for multi-station machining according to the present invention;

[0015] Figure 2 This is a cross-sectional view of the rotary clamping device for multi-station machining according to the present invention from the first angle.

[0016] Figure 3 yes Figure 2 An enlarged view of part A;

[0017] Figure 4 yes Figure 2 An enlarged view of part B;

[0018] Figure 5 This is a cross-sectional view from a second angle of the rotary clamping device for multi-station machining according to the present invention;

[0019] Figure 6 This is a cross-sectional view from the third angle of the rotary clamping device for multi-station machining according to the present invention;

[0020] Figure 7 yes Figure 6 Enlarged view of part C;

[0021] Figure 8 This is a structural diagram of the locking mechanism from one angle;

[0022] Figure 9 This is a structural diagram of the locking mechanism from another angle;

[0023] Figure 10 This is a structural diagram of a workpiece that requires machining on all four sides. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] Please see Figures 1 to 10 This invention provides a rotary clamping device for multi-station machining, comprising a hydraulic parallel gripper 1, an upper shaft seat 2 on the upper actuator 101 of the hydraulic parallel gripper 1, and a lower shaft seat 3 on the lower actuator 102 of the hydraulic parallel gripper 1; an upper rotating mechanism matching the upper shaft seat 2; an upper clamping block 4 below the upper rotating mechanism; an upper clamping groove 5 on the lower end face of the upper clamping block 4; and a lower rotating mechanism matching the lower shaft seat 3; the lower rotating mechanism... The lower clamping block 6 is provided, and the upper surface of the lower clamping block 6 is provided with a lower clamping groove 7 opposite to the upper clamping groove 5; the lower rotating mechanism includes a lower rotating shaft 8; the lower end of the lower rotating shaft 8 is provided with a driven gear 9; the lower end of the driven gear 9 is provided with a locking disc 10; the lower end of the lower shaft seat 3 is provided with a locking mechanism that matches the locking disc; the rear part of the lower shaft seat 3 is provided with an angle adjustment mechanism; the angle adjustment mechanism includes a drive shaft 11, and the front side wall of the drive shaft 11 is provided with a plurality of drive teeth 12 that mesh with the driven gear 9.

[0026] The lower rotating mechanism also includes a first bearing groove 13 on the upper surface of the lower shaft seat 3; a rotating hole 14 is provided at the center of the bottom of the first bearing groove 13, and the lower rotating shaft 8 is located in the rotating hole 14; a first limiting cover 15 in an annular shape is provided on the upper surface of the lower shaft seat 3, and the first limiting cover 15 is sleeved on the lower rotating shaft 8; a plurality of first bearings 16 axially sleeved on the lower rotating shaft 8 are provided between the lower surface of the first limiting cover 15 and the bottom of the first bearing groove 13.

[0027] The lower surface of the first limiting cover 15 is in contact with the upper end face of the outer ring 1601 of the uppermost first bearing, and the bottom of the first bearing groove 13 is in contact with the lower end face of the outer ring 1601 of the lowermost first bearing; the upper part of the lower rotating shaft 8 has a first limiting step 17 in the shape of an annular ring; the upper end face of the inner ring 1602 of the uppermost first bearing is in contact with the first limiting step 17; the lower end of the lower rotating shaft 8 is screwed with a first limiting sleeve 18; the outer wall of the first limiting sleeve 18 is provided with a first limiting hole 19 that communicates with its internal space; the lower end face of the inner ring 1602 of the lowermost first bearing is in contact with the upper surface of the first limiting sleeve 18.

[0028] The locking mechanism includes a lifting hole 20 located on the lower surface of the lower shaft seat 3, which is coaxial with the rotating hole 14. The lower end of the rotating hole 14 is connected to the center of the bottom of the lifting hole 20. A mounting base 21 is provided on the lower surface of the lower shaft seat 3. A matching hydraulic cylinder 22 is provided on the mounting base 21. A lifting plate 23 located in the lifting hole 20 is provided at the upper end of the piston rod of the hydraulic cylinder 22. A plurality of locking blocks 24 are evenly distributed in a circle on the upper surface of the lifting plate 23. The bottom of the lifting hole 20 is provided with a locking ring 25 that is attached to the outside of the locking plate 10; a plurality of guide posts 26 are provided between the lower surface of the locking ring 25 and the upper surface of the mounting base 21 in a circularly evenly distributed manner; the lifting plate 23 is provided with a plurality of guide holes 27 that match the guide posts 26; the lower surface of the locking plate 10 is provided with a plurality of first locking grooves 28 that match the inner end of the locking block 24; the lower surface of the locking ring 25 is provided with a plurality of second locking grooves 29 that match the outer end of the locking block 24.

[0029] The angle adjustment mechanism also includes a shaft hole 30 that matches the drive shaft 11, and the front side of the middle of the shaft hole 30 is connected to the rotating hole 14; the left and right side walls of the lower shaft seat 3 are provided with positioning holes 31 that are coaxial with the shaft hole 30; the positioning holes 31 are provided with guide sleeves 32 that are sleeved on the drive shaft 11; the rear side wall of the middle of the drive shaft 11 is provided with an oblong hole 33; the rear side wall of the lower shaft seat 3 is provided with a hidden groove 34; the center of the bottom of the hidden groove 34 is provided with a screw hole 35 that is connected to the shaft hole 30; a guide screw 36 is screwed into the screw hole 35, the head 3601 of the guide screw 36 is located in the hidden groove 34, and the inner end of the guide screw 36 passes into the oblong hole 33.

[0030] The upper rotating mechanism includes a second bearing groove 37 located on the lower surface of the upper shaft seat 2; a movable hole 38 is provided at the center of the bottom of the second bearing groove 37; an upper rotating shaft 39 coaxial with the second bearing groove 37 is provided inside the second bearing groove 37; a second limiting cover 40 in an annular shape is provided on the lower surface of the upper shaft seat 2, and the second limiting cover 40 is sleeved on the upper rotating shaft 39; a plurality of second bearings 41 axially sleeved on the upper rotating shaft 39 are provided inside the second bearing groove 37; the outer ring 4101 of the second bearing is located between the upper surface of the second limiting cover 40 and the second bearing groove 37; a second limiting sleeve 42 located in the movable hole 38 is screwed to the upper end of the upper rotating shaft 39; a second limiting hole 43 communicating with its internal space is provided on the outer wall of the second limiting sleeve 42; a second limiting step 44 in an annular shape is provided at the lower part of the upper rotating shaft 39, and the inner ring 4102 of the second bearing is located between the second limiting step 44 and the lower surface of the second limiting sleeve 42.

[0031] The method of using this invention is as follows:

[0032] When the hydraulic parallel gripper 1 is running, it can control the upper and lower actuators on its upper and lower sides to move up and down, thereby realizing the up and down movement of the upper shaft seat 2 and the lower shaft seat 3. Before clamping the workpiece 45, the upper clamping block 4 and the lower clamping block 6 move away from each other. As the workpiece 45 is inserted into the lower clamping groove 7 on the lower clamping block 6, the upper shaft seat 2 drives the upper clamping block 4 to move down, and the lower shaft seat 3 drives the lower clamping block 6 to move up, thereby clamping the workpiece 45 in the upper clamping groove 5 and the lower clamping groove 7. At this time, the front, left or right side of the workpiece 45 can be machined using a cutting tool. After the front, left or right side of the workpiece 45 is machined, the workpiece 45 can be rotated so that the machined side of the workpiece 45 is rotated to the rear to face the hydraulic parallel gripper 1, while the other three unmachined sides of the workpiece 45 are located on the left and right sides and the front side, respectively.

[0033] In actual use of the clamping device, corresponding electric cylinders can be set on the left and right sides of the drive shaft 11. At this time, both ends of the drive shaft 11 extend out of the lower shaft seat 3. Therefore, when the push rod of the electric cylinder pushes the left end of the drive shaft 11 to the left or the right end of the drive shaft 11 to the right, the drive shaft 11 under force will move left and right accordingly. The drive gear 12 on the front side of the drive shaft 11 meshes with the driven gear 9. When the drive shaft 11 moves, the driven gear 9 moves accordingly, thereby realizing the rotation of the lower rotating shaft 8. The lower clamping block 6 located at the upper end of the lower rotating shaft 8 and the upper clamping block 4 located at the lower end of the upper rotating shaft 39 are connected and fixed through the workpiece 45. Therefore, when the lower rotating shaft 8 rotates, the upper rotating shaft 39 rotates synchronously, ultimately realizing the rotation of the workpiece 45.

[0034] When the other three unprocessed sides of workpiece 45 are rotated to the left, right, and front sides respectively, the drive shaft 11 stops moving and can then be locked by the driven gear 9 through the locking mechanism, thereby ensuring the stability of workpiece 45 during processing. As the other three unprocessed sides of workpiece are rotated to the left, right, and front sides respectively, three corresponding tools can be set on the multi-station machining center at the same time to perform processing in three directions simultaneously. The entire processing of the four sides of the workpiece does not require disassembly, and all processing of the four sides can be completed in one clamping, completely avoiding the problem of needing to clamp the workpiece twice due to the hydraulic parallel gripper 1 blocking the rear side.

[0035] When the driving gear needs to be locked by the locking mechanism, the hydraulic cylinder 22 can be activated. At this time, the piston rod of the hydraulic cylinder 22 drives the lifting plate 23 to move upward. Finally, the locking block 24 on the upper surface of the lifting plate 23 simultaneously engages into the first locking groove 28 on the lower surface of the locking plate 10 and the second locking groove 29 on the lower surface of the locking ring 25. With the locking ring 25 fixed to the mounting base 21 by the guide post 26, as the locking block 24 simultaneously engages into the first locking groove 28 and the second locking groove 29, the locking plate 10 can be fixed, thereby locking the driven gear 9 and maximizing the stability of the workpiece 45 during processing. The rotation angle of the locking disc 10 can be precisely controlled by the travel of the drive shaft 11. When the travel of the drive shaft 11 corresponds to the rotation of the lower shaft 8 by 90 degrees, once the drive shaft 11 has completed its movement, the locking disc 10 can be rotated by 90 degrees through the meshing of the drive gear 12 and the driven gear 9, thereby controlling the rotation of the lower shaft 8 by 90 degrees. With the rotation angle of the locking disc 10 being precisely controlled, the locking block 24 can be precisely engaged in the first locking groove 28 and the second locking groove 29 to form an effective limit. Even when facing large cutting forces such as milling and drilling, it can reliably prevent the driven gear 9 and the workpiece 45 from deflecting unexpectedly.

[0036] The lower surface of the first limiting cover 15 is in contact with the upper end face of the outer ring 1601 of the uppermost first bearing, the bottom of the first bearing groove 13 is in contact with the lower end face of the outer ring 1601 of the lowermost first bearing, the upper part of the lower rotating shaft 8 has a ring-shaped first limiting step 17, and the lower end face of the inner ring 1602 of the lowermost first bearing is in contact with the upper surface of the first limiting sleeve 18. This limiting method of the first bearing 16 not only facilitates disassembly and assembly later, but also ensures the concentricity and smoothness of the lower rotating shaft 8. The first limiting cover 15 and the lower shaft seat 3 are fixed by several screws. The first limiting cover 15 can be quickly disassembled by simply unscrewing the screws, which facilitates the maintenance and replacement of other components.

[0037] The outer wall of the first limiting sleeve 18 is provided with a first limiting hole 19 that communicates with its internal space, and the outer wall of the second limiting sleeve 42 is provided with a second limiting hole 43 that communicates with its internal space. A screw for auxiliary limiting can be screwed into both the first limiting hole 19 and the second limiting hole 43. As long as the inner end of the screw is pressed tightly against the outer wall of the lower rotating shaft 8 and the upper rotating shaft 39, the stability of the first limiting sleeve 18 and the second limiting sleeve 42 can be further guaranteed.

[0038] A number of guide posts 26 are evenly distributed in a circle between the lower surface of the locking ring 25 and the upper surface of the mounting base 21. The lifting plate 23 is provided with a number of guide holes 27 that match the guide posts 26. The cooperation between the guide holes 27 and the guide posts 26 can play a guiding role when the lifting plate 23 moves up and down, ensuring the stability and accuracy of the locking block 24 when it moves. The upper end of the guide post 26 can be fixed to the locking ring 25 by a number of screws. This fixing method facilitates the disassembly and assembly of the locking ring 25, thereby facilitating the disassembly and assembly of the lifting plate 23.

[0039] The positioning hole 31 is provided with a guide sleeve 32 that is fitted outside the drive shaft 11. The presence of the guide sleeve 32 can play a guiding role when the drive shaft 11 moves. The guide sleeve 32 and the bottom of the positioning hole 31 can be fixed by several screws. This fixing method facilitates the disassembly and assembly of the guide sleeve 32, thereby facilitating the maintenance and replacement of the guide sleeve 32.

[0040] A waist-shaped hole 33 is provided on the rear side wall of the middle part of the drive shaft 11. The inner end of the guide screw 36 passes through the waist-shaped hole 33. The cooperation between the waist-shaped hole 33 and the guide screw 36 can not only effectively prevent the drive shaft 11 from rotating, but also play an auxiliary guiding role. Moreover, the length of the waist-shaped hole 33 can effectively limit the maximum travel of the drive shaft 11, further ensuring the accuracy of the workpiece 45 when rotating.

[0041] The lower surface of the upper shaft seat 2 is provided with a second ring-shaped limiting cover 40, which is sleeved on the upper rotating shaft 39. Several second bearings 41 are axially sleeved on the upper rotating shaft 39 in the second bearing groove 37. The outer ring 4101 of the second bearing is located between the upper surface of the second limiting cover 40 and the second bearing groove 37, and the inner ring 4102 of the second bearing is located between the second limiting step 44 and the lower surface of the second limiting sleeve 42. The presence of the second bearings 41 can effectively ensure the coaxiality and smoothness of the upper rotating shaft 39. The second limiting cover 40 and the upper shaft seat 2 can be fixed by several screws. This fixing method facilitates the disassembly and assembly of the second limiting cover 40 and also facilitates the maintenance and replacement of the second bearings 41.

[0042] The upper shaft seat 2 and the upper actuator 101 of the hydraulic parallel gripper 1, and the lower shaft seat 3 and the lower actuator 102 of the hydraulic parallel gripper 1, can be fixed together by a number of screws. This fixing method facilitates the disassembly and assembly of the upper shaft seat 2 and the lower shaft seat 3, thereby facilitating the replacement of upper shaft seats and lower shaft seats of different specifications.

Claims

1. A rotary clamping device for multi-station machining, comprising hydraulic parallel grippers, characterized in that: The hydraulic parallel gripper has an upper shaft seat on its upper actuator and a lower shaft seat on its lower actuator. The upper shaft seat has a matching upper rotating mechanism. Below the upper rotating mechanism is an upper clamping block. The lower end face of the upper clamping block has an upper clamping groove. The lower shaft seat has a matching lower rotating mechanism. Above the lower rotating mechanism is a lower clamping block, the upper surface of which has a lower clamping groove opposite to the upper clamping groove. The lower rotating mechanism includes a lower rotating shaft. The lower end of the lower rotating shaft has a driven gear. The lower end of the driven gear has a locking disc. The lower end of the lower shaft seat has a locking mechanism matching the locking disc. The rear of the lower shaft seat has an angle adjustment mechanism. The angle adjustment mechanism includes a drive shaft, the front side wall of which has several drive teeth meshing with the driven gear.

2. The rotary clamping device for multi-station machining according to claim 1, characterized in that: The lower rotating mechanism also includes a first bearing groove on the upper surface of the lower shaft seat; a rotating hole is provided at the center of the bottom of the first bearing groove, and the lower rotating shaft is located in the rotating hole; a first limiting cover in an annular shape is provided on the upper surface of the lower shaft seat, and the first limiting cover is sleeved on the lower rotating shaft; a plurality of first bearings axially sleeved on the lower rotating shaft are provided between the lower surface of the first limiting cover and the bottom of the first bearing groove.

3. A rotary clamping device for multi-station machining according to claim 2, characterized in that: The lower surface of the first limiting cover is in contact with the upper end face of the outer ring of the uppermost first bearing, and the bottom of the first bearing groove is in contact with the lower end face of the outer ring of the lowermost first bearing; the upper part of the lower rotating shaft has a first limiting step in the shape of an annular shape; the upper end face of the inner ring of the uppermost first bearing is in contact with the first limiting step; the lower end of the lower rotating shaft is screwed with a first limiting sleeve; the outer wall of the first limiting sleeve is provided with a first limiting hole that communicates with its internal space; the lower end face of the inner ring of the lowermost first bearing is in contact with the upper surface of the first limiting sleeve.

4. A rotary clamping device for multi-station machining according to claim 2, characterized in that: The locking mechanism includes a lifting hole on the lower surface of the lower shaft seat, which is coaxial with the rotating hole; the lower end of the rotating hole is connected to the center of the bottom of the lifting hole; a mounting seat is provided on the lower surface of the lower shaft seat; a matching hydraulic cylinder is provided on the mounting seat; a lifting plate located inside the lifting hole is provided at the upper end of the piston rod of the hydraulic cylinder; a plurality of locking blocks are provided on the upper surface of the lifting plate in a circumferentially evenly distributed manner; a locking ring is provided at the bottom of the lifting hole outside the locking plate; a plurality of guide posts are provided between the lower surface of the locking ring and the upper surface of the mounting seat in a circumferentially evenly distributed manner; a plurality of guide holes matching the guide posts are provided on the lifting plate; a plurality of first locking grooves matching the inner ends of the locking blocks are provided on the lower surface of the locking plate; a plurality of second locking grooves matching the outer ends of the locking blocks are provided on the lower surface of the locking ring.

5. A rotary clamping device for multi-station machining according to claim 1, characterized in that: The angle adjustment mechanism also includes a shaft hole that matches the drive shaft, with the front side of the shaft hole communicating with the rotating hole; both the left and right side walls of the lower shaft seat are provided with positioning holes coaxial with the shaft hole; a guide sleeve fitted onto the drive shaft is provided in the positioning hole; a waist-shaped hole is provided on the rear side wall of the drive shaft; a hidden groove is provided on the rear side wall of the lower shaft seat; a screw hole communicating with the shaft hole is provided at the center of the bottom of the hidden groove; a guide screw is screwed into the screw hole, with the head of the guide screw located in the hidden groove and the inner end of the guide screw inserted into the waist-shaped hole.

6. A rotary clamping device for multi-station machining according to claim 1, characterized in that: The upper rotating mechanism includes a second bearing groove on the lower surface of the upper shaft seat; a movable hole is provided at the center of the bottom of the second bearing groove; an upper rotating shaft coaxial with the second bearing groove is provided in the second bearing groove; a second limiting cover in an annular shape is provided on the lower surface of the upper shaft seat, and the second limiting cover is sleeved on the upper rotating shaft; a plurality of second bearings axially sleeved on the upper rotating shaft are provided in the second bearing groove; the outer ring of the second bearing is located between the upper surface of the second limiting cover and the second bearing groove; a second limiting sleeve located in the movable hole is screwed to the upper end of the upper rotating shaft; a second limiting hole communicating with its internal space is provided on the outer wall of the second limiting sleeve; a second limiting step in an annular shape is provided at the lower part of the upper rotating shaft, and the inner ring of the second bearing is located between the second limiting step and the lower surface of the second limiting sleeve.

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