A workpiece rotation driving device for a workpiece surface groove processing device

Abstract

The present invention discloses a workpiece rotation driving device for a workpiece surface groove processing device, comprising: a clamping mechanism, including a frame, a rotating base rotatably mounted on the bottom side of the frame, and a lifting seat movably mounted on the upper side of the frame; a covering inner hole limiting component, including a fixed cylinder fixedly connected to the bottom side of the lifting seat, a plurality of arc-shaped pushing plates are movably arranged around the fixed cylinder, and arc-shaped pressing plates are respectively movably arranged between adjacent two arc-shaped pushing plates, and a group of corresponding connecting rods are fixedly connected to the arc-shaped pushing plates and the arc-shaped pressing plates respectively; a limiting driving mechanism, including a driving shaft, a sliding rod is obliquely fixedly connected between a group of the connecting rods, and a plurality of inverted T-shaped grooves for slidably connecting the sliding rod are arranged on the outer side surface of the driving shaft. The present invention can not only effectively ensure the overall clamping effect of the workpiece, but also reduce the deformation amount of the workpiece mounting hole caused by spinning processing.

Description

Technical Field

[0001] The present invention relates to a workpiece rotation driving device for a workpiece surface groove processing device, which is mainly used for fixing a cylindrical workpiece and driving it to rotate, so as to cooperate with a spinning wheel mechanism to process a groove on the surface of the workpiece. Background Art

[0002] Existing workpieces, such as pulley wheels, etc., often need to be processed with grooves on the surface of a blank with a mounting hole in the middle through a corresponding workpiece surface groove processing device. The existing workpiece surface groove processing device generally includes a workpiece rotation driving device for rotating and driving a blank workpiece, and a spinning wheel mechanism for spinning and processing a groove on the surface of the workpiece.

[0003] Most of the existing workpiece rotation driving devices for workpiece surface groove processing equipment include a rotating base rotatably mounted on the bottom side of the frame and a lifting seat liftably mounted on the upper side of the frame. The lifting seat is driven by a lifting oil cylinder to descend, so as to longitudinally and rotatably fix and clamp a blank workpiece between the lifting seat and the rotating base, and then drive the rotating base or the lifting seat to rotate through a corresponding synchronous driving mechanism. Since there is a mounting hole in the middle of the blank workpiece, during the process of longitudinally rotating and clamping it, if the clamping force is low, the blank workpiece will be prone to position deviation during the spinning process, and serious production accidents will occur in severe cases; if the clamping force is high, it is easy to cause mechanical damage to the clamping end of the blank workpiece. Another problem existing in the actual application process of the existing workpiece rotation driving device for workpiece surface groove processing equipment is that when spinning and processing the surface groove of the blank workpiece, due to the lack of sufficient support for the blank workpiece with a mounting hole, obvious deformation often occurs at the mounting hole of the processed workpiece, resulting in waste, which is very troublesome.

[0004] Therefore, the research purpose of the present invention is to design a workpiece rotation driving device for a workpiece surface groove processing device, which can form a complete circular tube support surface at the mounting hole of the workpiece synchronously during the process of rotatably fixing and clamping the workpiece, so as to effectively ensure the overall clamping effect of the workpiece; and can reduce the deformation amount of the mounting hole of the workpiece caused by spinning processing. Summary of the Invention

[0005] Aiming at the technical problems existing in the above-mentioned prior art, the present invention provides a workpiece rotation driving device for a workpiece surface groove processing device, which can effectively solve the technical problems existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is as follows:

[0007] A workpiece rotation driving device for a workpiece surface groove processing device, comprising:

[0008] The clamping mechanism includes a frame, a rotating base rotatably installed on the bottom side of the frame, and a lifting seat liftably installed on the upper side of the frame. The lifting seat is driven by a corresponding lifting oil cylinder, and the rotating base and the lifting seat are synchronously driven by a corresponding synchronous drive mechanism;

[0009] The covering type inner hole limiting component includes a fixed cylinder body fixedly connected to the bottom side of the lifting seat. A plurality of corresponding arc-shaped blocking and pushing plates are movably arranged at equal intervals on the periphery of the fixed cylinder body. Corresponding arc-shaped pressing plates are movably arranged between adjacent two arc-shaped blocking and pushing plates. The arc-shaped pressing plates are located inside adjacent two arc-shaped blocking and pushing plates and are arranged at intervals with the arc-shaped blocking and pushing plates. A group of corresponding connecting rods are fixedly connected inward according to height on the arc-shaped blocking and pushing plates and the arc-shaped pressing plates respectively. The connecting rods are respectively movably inserted through the inside of the fixed cylinder body;

[0010] The limiting drive mechanism includes a drive shaft movably inserted into the fixed cylinder body. The top of the drive shaft is fixedly connected to the bottom side of the lifting seat through a spiral spring. Corresponding slide rods are fixedly connected in an inverted T shape between a group of the connecting rods. The inclination angle of the slide rod connected to the arc-shaped pressing plate is greater than the inclination angle of the slide rod connected to the arc-shaped blocking and pushing plate. A plurality of inverted T-shaped grooves for slidably connecting the slide rods are arranged on the outer side surface of the drive shaft; when the lifting seat moves down to the in-place position to clamp the workpiece between the lifting seat and the rotating base, the arc-shaped blocking and pushing plates and the arc-shaped pressing plates are respectively moved outward under the drive of the inverted T-shaped grooves on the drive shaft and form a complete circular tube surface tightly pressing against the inner hole wall of the workpiece.

[0011] Corresponding abutting inclined surfaces are respectively arranged on both sides of the arc-shaped blocking and pushing plate in an inward inclined manner, and the two sides of the arc-shaped pressing plate are respectively arranged to be abutting inclined surfaces adapted to the abutting inclined surfaces.

[0012] The bottom parts of the arc-shaped blocking and pushing plate, the arc-shaped pressing plate, and the drive shaft respectively extend to the lower side of the bottom end of the fixed cylinder body. A plurality of fixed blocks are arranged at intervals on the rotating base and located inside the arc-shaped pressing plate. Corresponding swing rods are swingably installed on the fixed blocks respectively. When the lifting seat moves down to the in-place position to fixedly clamp the workpiece between the lifting seat and the rotating base, the bottom end of the fixed cylinder body presses down on the inner end of the swing rod, so that the outer end of the swing rod fixedly presses against the bottom side of the inner side wall of the arc-shaped pressing plate.

[0013] Arc-shaped rods abutting against the lower side of the arc-shaped pressing plate are respectively fixedly connected to the outer ends of the swing rods.

[0014] The top ends of the arc-shaped push plates and arc-shaped pressing plates are respectively fixedly connected outward in an inverted L shape with corresponding buffer pressing plates, and the buffer pressing plates are made of rubber materials.

[0015] In the middle of the lifting seat, an installation round table for connecting the fixed cylinder is integrally formed and arranged downward. The outer edge of the installation round table is located outside the fixed cylinder. The lifting seat descends and presses on the upper side of the buffer pressing plate, so that the buffer pressing plate is fixed in an extruded state between the lifting seat and the top end of the workpiece. The outer edge of the installation round table forms a stroke limit for the inner side of the buffer pressing plate after extrusion deformation.

[0016] After the lifting seat descends in place to press the workpiece, there is a gap between the bottom ends of the arc-shaped push plates and arc-shaped pressing plates and the rotating base.

[0017] A corresponding guiding convex edge is arranged inward on the bottom side of the fixed cylinder. The driving shaft can be movably inserted into the guiding convex edge, and there is a gap between the upper side of the driving shaft and the fixed cylinder.

[0018] In the middle of the rotating base, a pushing round table for pushing the driving shaft is integrally formed and arranged upward. The fixed blocks are respectively arranged on the rotating base outside the pushing round table.

[0019] The synchronous driving mechanism adopts a group of corresponding synchronous motors. The rotating base and the lifting seat are respectively connected to the output shaft ends of a group of the synchronous motors in a belt transmission manner.

[0020] Advantages of the present invention:

[0021] 1) The present invention is additionally provided with a covering type inner hole limiting component, which includes a fixed cylinder body fixedly connected to the bottom side of the lifting seat. A number of corresponding arc-shaped pushing plates are movably arranged at equal intervals around the fixed cylinder body. A corresponding arc-shaped pressing plate is movably arranged between two adjacent arc-shaped pushing plates respectively. The arc-shaped pressing plate is located inside two adjacent arc-shaped pushing plates and is arranged at an interval from the arc-shaped pushing plates. A set of connecting rods fixedly connected to the arc-shaped pushing plates and the arc-shaped pressing plates according to height are used to effectively install the sliding rods, and the inclination angle of the sliding rod connected to the arc-shaped pressing plate is set to be greater than the inclination angle of the sliding rod connected to the arc-shaped pushing plate. In this way, under the drive of the inverted T-shaped grooves with different inclination angles of the drive shaft of the limit drive mechanism, the arc-shaped pushing plates and the arc-shaped pressing plates can be externally pushed and driven at different speeds simultaneously, and the moving speed of the arc-shaped pressing plate is greater than that of the arc-shaped pushing plate. When the lifting seat descends in place to clamp the workpiece between the lifting seat and the rotating base, the arc-shaped pushing plates and the arc-shaped pressing plates are externally pushed in place synchronously, so that the arc-shaped pushing plates and the arc-shaped pressing plates form a complete circular tube support surface at the installation hole of the workpiece. Thus, the overall clamping effect of the workpiece can be effectively ensured, and the deformation amount of the installation hole of the workpiece caused by spinning can be reduced.

[0022] 2) The two sides of the arc-shaped pushing plate of the present invention are respectively inclined inwards with corresponding abutting inclined surfaces, and the two sides of the arc-shaped pressing plate are respectively set as pressing inclined surfaces adapted to the abutting inclined surfaces. When the arc-shaped pushing plate and the arc-shaped pressing plate cooperate to form a complete circular tube support surface inside the installation hole of the workpiece, part of the force on the arc-shaped pushing plate can be evenly dispersed and transferred obliquely to the arc-shaped pressing plate, so that not only the force dispersion effect during spinning can be improved, but also the structural stability between the arc-shaped pushing plate and the arc-shaped pressing plate during the force application process can be enhanced.

[0023] 3) Since inverted T-shaped grooves with different inclination angles need to be arranged on the drive shaft to drive the sliding rods installed on the arc-shaped pushing plates and the arc-shaped pressing plates, due to the stroke limitation between various components, the connecting rods and the sliding rods cannot be arranged at the bottom of the arc-shaped pushing plates and the arc-shaped pressing plates, resulting in the lack of necessary support at the bottom of the circular tube support surface formed by the arc-shaped pushing plates and the arc-shaped pressing plates. For this reason, the present invention further arranges a number of fixed blocks at intervals on the rotating base and inside the arc-shaped pressing plates. Corresponding swing rods are swingably installed on the fixed blocks respectively. When the lifting seat descends in place to fixedly clamp the workpiece between the lifting seat and the rotating base, the bottom end of the fixed cylinder body presses the inner end of the swing rod, so that the outer end of the swing rod fixedly presses against the bottom side of the inner side wall of the arc-shaped pressing plate, thereby effectively forming a strengthening support at the bottom side of each arc-shaped pressing plate. In addition, part of the force on the arc-shaped pushing plate can be evenly dispersed and transferred obliquely to the arc-shaped pressing plate. Therefore, the support stability at the bottom of the circular tube support surface formed by the arc-shaped pushing plates and the arc-shaped pressing plates can be effectively ensured.

[0024] 4) The top ends of the arc-shaped push plate and the arc-shaped pressing plate of the present invention are respectively fixedly connected with corresponding buffer pressing plates in an inverted L shape outward, and a mounting round table for connecting and fixing the fixed cylinder is integrally formed and arranged downward in the middle of the lifting seat. The outer edge of the mounting round table is located outside the fixed cylinder. When the lifting seat moves downward and presses on the upper side of the buffer pressing plate, the outer edge of the mounting round table forms a stroke limit for the inner side of the buffer pressing plate after extrusion deformation, so as to ensure that the buffer pressing plate can be more stably fixed in an extruded state between the lifting seat and the top end of the workpiece, thereby assisting in improving the clamping effect on the workpiece. Brief Description of the Drawings

[0025] Figure 1 is a structural schematic diagram of the present invention.

[0026] Figure 2 is a structural schematic diagram of the covering type inner hole limiting component.

[0027] Figure 3 is a front view of the covering type inner hole limiting component.

[0028] Figure 4 is a sectional view of the covering type inner hole limiting component.

[0029] Figure 5 is an exploded view of the parts of the covering type inner hole limiting component.

[0030] Figure 6 is a usage state diagram when the covering type inner hole limiting component forms fixation on the workpiece.

[0031] Figure 7 is a usage state diagram of the present invention on the workpiece surface groove processing equipment.

[0032] In the drawings: clamping mechanism 1, frame 101, rotating base 102, lifting seat 103, lifting oil cylinder 2, covering type inner hole limiting component 3, fixed cylinder 301, arc-shaped push plate 302, arc-shaped pressing plate 303, connecting rod 304, sliding rod 305, limit driving mechanism 4, driving shaft 401, spiral spring 402, inverted T-shaped groove 5, workpiece 6, fixed block 7, swinging rod 8, arc-shaped rod 9, buffer pressing plate 10, mounting round table 11, guiding convex edge 12, push round table 13, synchronous motor 14. Detailed Description of the Embodiment

[0033] For the convenience of those skilled in the art to understand, the structure of the present invention will be further described in detail below in conjunction with the drawings in the embodiments:

[0034] Refer to Figure 1-7 , a workpiece rotation driving device for a workpiece surface groove processing equipment, comprising:

[0035] The clamping mechanism 1 includes a frame 101, a rotating base 102 rotatably mounted on the bottom side of the frame 101, and a lifting seat 103 liftably mounted on the upper side of the frame 101. The lifting seat 103 is driven by a corresponding lifting oil cylinder 2. After the workpiece 6 is mounted on the upper side of the rotating base 102, the lifting oil cylinder 2 drives the lifting seat 103 to descend, so as to rotatably and fixedly clamp the workpiece 6 between the lifting seat 103 and the rotating base 102. The rotating base 102 and the lifting seat 103 are synchronously driven by a corresponding synchronous drive mechanism.

[0036] The covering type inner hole limiting component 3 includes a fixed cylinder body 301 fixedly connected to the bottom side of the lifting seat 103. A plurality of corresponding arc-shaped blocking and pushing plates 302 are movably arranged at equal intervals on the periphery of the fixed cylinder body 301. Corresponding arc-shaped pressing plates 303 are movably arranged between adjacent two arc-shaped blocking and pushing plates 302. The arc-shaped pressing plates 303 are located inside adjacent two arc-shaped blocking and pushing plates 302 and are arranged at intervals with the arc-shaped blocking and pushing plates 302. A group of corresponding connecting rods 304 are fixedly connected to the arc-shaped blocking and pushing plates 302 and the arc-shaped pressing plates 303 inwards according to height. The connecting rods 304 are respectively movably inserted through and into the inside of the fixed cylinder body 301.

[0037] The limiting drive mechanism 4 includes a drive shaft 401 movably inserted into the fixed cylinder body 301. The top of the drive shaft 401 is fixedly connected to the bottom side of the lifting seat 103 through a spiral spring 402. Corresponding slide rods 305 are fixedly connected between a group of the connecting rods 304 in an inverted T shape. The inclination angle of the slide rod 305 connected to the arc-shaped pressing plate 303 is greater than the inclination angle of the slide rod 305 connected to the arc-shaped blocking and pushing plate 302. A plurality of inverted T-shaped grooves 5 for slidably connecting the slide rods 305 are arranged on the outer side surface of the drive shaft 401. When the lifting seat 103 descends in place to clamp the workpiece 6 between the lifting seat 103 and the rotating base 102, the arc-shaped blocking and pushing plates 302 and the arc-shaped pressing plates 303 are respectively moved outwards under the drive of the inverted T-shaped grooves 5 on the drive shaft 401 and form a complete circular tube surface tightly pressing on the inner hole wall of the workpiece 6.

[0038] The present invention is additionally provided with a covering type inner hole limiting component 3, which includes a fixed cylinder body 301 fixedly connected to the bottom side of the lifting seat 103. A plurality of corresponding arc-shaped pushing plates 302 are movably arranged at equal intervals around the fixed cylinder body 301. Corresponding arc-shaped pressing plates 303 are movably arranged between adjacent two arc-shaped pushing plates 302 respectively. The arc-shaped pressing plates 303 are located inside adjacent two arc-shaped pushing plates 302 and are arranged at intervals with the arc-shaped pushing plates 302. A group of connecting rods 304 fixedly connected to the arc-shaped pushing plates 302 and the arc-shaped pressing plates 303 according to height are used to effectively install the sliding rods 305, and the inclination angle of the sliding rod 305 connected to the arc-shaped pressing plate 303 is set to be greater than the inclination angle of the sliding rod 305 connected to the arc-shaped pushing plate 302. In this way, under the drive of the inverted T-shaped grooves 5 with different inclination angles of the drive shaft 401 of the limiting drive mechanism 4, the arc-shaped pushing plates 302 and the arc-shaped pressing plates 303 can be externally pushed and driven at different speeds simultaneously. And the moving speed of the arc-shaped pressing plates 303 is greater than that of the arc-shaped pushing plates 302. When the lifting seat 103 moves down to place the workpiece 6 between the lifting seat 103 and the rotating base 102, the arc-shaped pushing plates 302 and the arc-shaped pressing plates 303 are externally pushed in place synchronously, so that the arc-shaped pushing plates 302 and the arc-shaped pressing plates 303 form a complete circular tube support surface at the installation hole of the workpiece 6. Thus, on the basis of effectively reducing the clamping force on the upper and lower ends of the workpiece 6, the overall clamping effect of the workpiece 6 can be effectively ensured, and the deformation amount of the installation hole of the workpiece caused by spinning can be reduced.

[0039] Corresponding abutting inclined surfaces are respectively arranged on both sides of the arc-shaped pushing plate 302 and inclined inwards, and the two sides of the arc-shaped pressing plate 303 are respectively arranged as pressing inclined surfaces adapted to the abutting inclined surfaces.

[0040] When the arc-shaped pushing plate 302 and the arc-shaped pressing plate 303 cooperate to form a complete circular tube support surface inside the installation hole of the workpiece 6, part of the force on the arc-shaped pushing plate 302 can be evenly dispersed and transferred obliquely to the arc-shaped pressing plate 303, so that not only the force dispersion effect during spinning can be improved, but also the structural stability between the arc-shaped pushing plate 302 and the arc-shaped pressing plate 303 during the force application process can be improved.

[0041] The bottom parts of the arc-shaped pushing plate 302, the arc-shaped pressing plate 303, and the driving shaft 401 respectively extend to the lower side of the bottom end of the fixed cylinder 301. A plurality of fixing blocks 7 are arranged at intervals on the rotating base 102 and are located inside the arc-shaped pressing plate 303. Corresponding swing rods 8 are swingably mounted on the fixing blocks 7 respectively. When the lifting seat 103 descends to the in-place position to fixedly clamp the workpiece 6 between the lifting seat 103 and the rotating base 102, the bottom end of the fixed cylinder 301 presses down on the inner end of the swing rod 8, so that the outer end of the swing rod 8 fixedly presses against the bottom side of the inner side wall of the arc-shaped pressing plate 303. Arc-shaped rods 9 that abut against the lower side of the arc-shaped pressing plate 303 are fixedly connected to the outer ends of the swing rods 8 respectively.

[0042] Since inverted T-shaped grooves 5 with different inclination angles need to be arranged on the driving shaft 401 to drive the slide rods 305 installed on the arc-shaped pushing plate 302 and the arc-shaped pressing plate 303, due to the stroke limitation between components, the connecting rod 304 and the slide rod 305 cannot be arranged at the bottom of the arc-shaped pushing plate 302 and the arc-shaped pressing plate 303, resulting in ensuring necessary support for the bottom of the circular tube support surface formed by the arc-shaped pushing plate 302 and the arc-shaped pressing plate 303. For this reason, the present invention further arranges a plurality of fixing blocks 7 at intervals on the rotating base 102 and is located inside the arc-shaped pressing plate 303. Corresponding swing rods 8 are swingably mounted on the fixing blocks 7 respectively. When the lifting seat 103 descends to the in-place position to fixedly clamp the workpiece 6 between the lifting seat 103 and the rotating base 102, the bottom end of the fixed cylinder 301 presses down on the inner end of the swing rod 8, so that the outer end of the swing rod 8 fixedly presses against the bottom side of the inner side wall of the arc-shaped pressing plate 303, thereby effectively forming a strengthened support at the bottom side of each arc-shaped pressing plate 303. In addition, part of the force on the arc-shaped pushing plate 302 can be evenly dispersed and transferred obliquely to the arc-shaped pressing plate 303. Therefore, the support stability of the bottom of the circular tube support surface formed by the arc-shaped pushing plate 302 and the arc-shaped pressing plate 303 can be effectively ensured.

[0043] The top ends of the arc-shaped pushing plate 302 and the arc-shaped pressing plate 303 are respectively fixedly connected with corresponding buffer pressing plates 10 in an inverted L shape outward. The buffer pressing plates 10 are made of rubber materials.

[0044] An installation round platform 11 for connecting the fixed cylinder 301 is integrally formed and arranged downward in the middle of the lifting seat 103. The outer edge of the installation round platform 11 is located outside the fixed cylinder 301. The lifting seat 103 descends and presses tightly on the upper side of the buffer pressing plate 10, so that the buffer pressing plate 10 is in an extrusion state and is fixed between the lifting seat 103 and the top end of the workpiece 6. The outer edge of the installation round platform 11 forms a stroke limit for the inner side of the buffer pressing plate 10 after extrusion deformation.

[0045] The top ends of the arc-shaped push plate 302 and the arc-shaped clamping plate 303 of the present invention are respectively in an inverted L-shape and fixedly connected to the corresponding buffer pressure plate 10 outward, and the middle part of the lifting seat 103 is integrally formed with a mounting table 11 downwardly provided for connecting to the fixed cylinder 301, and the outer edge of the mounting table 11 is located on the outer side of the fixed cylinder 301. When the lifting seat 103 is pressed downward on the upper side of the buffer pressure plate 10, the outer edge of the mounting table 11 forms a travel limit for the inner side of the buffer pressure plate 10 after extrusion and deformation, so as to ensure that the buffer pressure plate 10 can be more stably fixed in an extruded state between the lifting seat 103 and the top end of the workpiece 6, so as to assist in improving the clamping effect of the workpiece 6.

[0046] After the lifting seat 103 moves downward to the position to press the workpiece 6 , the bottom ends of the arc-shaped push plate 302 and the arc-shaped pressing plate 303 are spaced apart from the rotating base 102 .

[0047] A circle of corresponding guide protrusions 12 is provided inwardly on the bottom side of the fixed cylinder 301 , and the driving shaft 401 can be movably inserted into the guiding protrusions 12 , and the upper side of the driving shaft 401 is spaced apart from the fixed cylinder 301 .

[0048] The middle part of the rotating base 102 is integrally formed with a blocking and pushing circular platform 13 for blocking and pushing the driving shaft 401 , and the fixing blocks 7 are respectively arranged on the rotating base 102 outside the blocking and pushing circular platform 13 .

[0049] The synchronous driving mechanism adopts a group of corresponding synchronous motors 14, and the rotating base 102 and the lifting base 103 are respectively connected to the output shaft ends of the group of synchronous motors 14 through belt transmission.

[0050] The hydraulic system of the lifting cylinder 2 in this embodiment is equipped with a pressure sensor, which can directly measure the pressure changes inside the lifting cylinder 2, so that the pushing thrust of the lifting cylinder 2 can be controlled within a set range, and then the tightening effect of the arc-shaped push plate 302 and the arc-shaped tightening plate 303 can be controlled. Slight assembly errors between components can be adapted through the deformation of the buffer pressure plate 10.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A workpiece rotation driving device for a workpiece surface groove processing device, characterized in that, Including: A clamping mechanism (1), comprising a frame (101), a rotating base (102) rotatably mounted on the bottom side of the frame (101), and a lifting seat (103) liftably mounted on the upper side of the frame (101), wherein the lifting seat (103) is driven by a corresponding lifting oil cylinder (2), and the rotating base (102) and the lifting seat (103) are synchronously driven by a corresponding synchronous driving mechanism; A covering type inner hole limiting component (3), comprising a fixed cylinder (301) fixedly connected to the bottom side of the lifting seat (103), and a plurality of corresponding arc-shaped pushing plates (302) movably arranged at equal intervals around the fixed cylinder (301), and corresponding arc-shaped pressing plates (303) are movably arranged between adjacent two arc-shaped pushing plates (302), the arc-shaped pressing plates (303) are located inside adjacent two arc-shaped pushing plates (302) and are arranged at intervals with the arc-shaped pushing plates (302), and a group of corresponding connecting rods (304) are fixedly connected inwardly according to height on the arc-shaped pushing plates (302) and the arc-shaped pressing plates (303), and the connecting rods (304) are respectively movably inserted through and into the inside of the fixed cylinder (301); A limiting driving mechanism (4), comprising a driving shaft (401) movably inserted into the fixed cylinder (301), the top of the driving shaft (401) is fixedly connected to the bottom side of the lifting seat (103) through a spiral spring (402), and corresponding sliding rods (305) are fixedly connected in an inverted T shape and obliquely between a group of the connecting rods (304), the inclination angle of the sliding rod (305) connected to the arc-shaped pressing plate (303) is greater than the inclination angle of the sliding rod (305) connected to the arc-shaped pushing plate (302), and a plurality of inverted T-shaped grooves (5) for slidably connecting the sliding rods (305) are arranged on the outer side surface of the driving shaft (401); when the lifting seat (103) descends in place to clamp a workpiece (6) between the lifting seat (103) and the rotating base (102), the arc-shaped pushing plates (302) and the arc-shaped pressing plates (303) are respectively moved outward under the driving of the inverted T-shaped grooves (5) on the driving shaft (401) and form a complete circular tube surface tightly pressing on the inner hole wall of the workpiece (6); Corresponding abutting inclined surfaces are respectively arranged on both sides of the arc-shaped pushing plate (302) and inclined inwardly, and corresponding pressing inclined surfaces adapted to the abutting inclined surfaces are respectively arranged on both sides of the arc-shaped pressing plate (303); The arc-shaped push plate (302), the arc-shaped pressing plate (303), and the bottom of the driving shaft (401) respectively extend to the lower side of the bottom end of the fixed cylinder (301); a plurality of fixed blocks (7) located inside the arc-shaped pressing plate (303) are arranged on the rotating base (102) at intervals; corresponding swing rods (8) are swingably mounted on the fixed blocks (7); when the lifting seat (103) moves down to a position to fix and clamp the workpiece (6) between the lifting seat (103) and the rotating base (102), the bottom end of the fixed cylinder (301) presses down on the inner end of the swing rod (8), so that the outer end of the swing rod (8) is fixedly pressed against the bottom side of the inner wall of the arc-shaped pressing plate (303).

2. The workpiece rotation driving device for a workpiece surface groove processing device according to claim 1, wherein, The outer ends of the swing rods (8) are respectively fixedly connected with arc-shaped rod members (9) that abut against the lower side of the arc-shaped pressing plate (303).

3. The workpiece rotation driving device for a workpiece surface groove processing device according to claim 1, characterized in that, The top ends of the arc-shaped push-blocking plate (302) and the arc-shaped tightening plate (303) are respectively in an inverted L-shape and are outwardly fixedly connected to corresponding buffer pressing plates (10), and the buffer pressing plates (10) are made of rubber material.

4. The workpiece rotation driving device for a workpiece surface groove processing device according to claim 3, characterized in that, The middle part of the lifting seat (103) is integrally formed with a mounting truncated platform (11) for connecting to the fixed cylinder (301). The outer edge of the mounting truncated platform (11) is located on the outside of the fixed cylinder (301). The lifting seat (103) is pressed downward against the upper side of the buffer pressure plate (10), so that the buffer pressure plate (10) is fixed between the lifting seat (103) and the top end of the workpiece (6) in an extruded state. The outer edge of the mounting truncated platform (11) forms a travel limit for the inner side of the buffer pressure plate (10) after extrusion and deformation.

5. A workpiece rotation driving device for a workpiece surface groove processing device according to claim 4, characterized in that, After the lifting seat (103) moves downward to a position to press the workpiece (6), the bottom ends of the arc-shaped push plate (302) and the arc-shaped pressing plate (303) are spaced from the rotating base (102).

6. A workpiece rotation driving device for a workpiece surface groove processing device according to claim 1, characterized in that, A circle of corresponding guide protrusions (12) is arranged inwardly on the bottom side of the fixed cylinder (301), and the drive shaft (401) is movably inserted into the guide protrusion (12). The upper side of the drive shaft (401) is arranged at a distance from the fixed cylinder (301).

7. A workpiece rotation driving device for a workpiece surface groove processing equipment according to claim 1, characterized in that, The middle part of the rotating base (102) is integrally formed with a push-blocking circular platform (13) which is used to push the driving shaft (401) upwards, and the fixed blocks (7) are respectively arranged on the rotating base (102) outside the push-blocking circular platform (13).

8. A workpiece rotation driving device for a workpiece surface groove processing device according to claim 1, characterized in that, The synchronous drive mechanism adopts a group of corresponding synchronous motors (14), and the rotating base (102) and the lifting base (103) are respectively connected to the output shaft ends of the group of synchronous motors (14) through belt transmission.

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