A stepless angle adjustment clamping device for forgings and its clamping method

Abstract

This invention discloses a stepless angle-adjustable clamping device and method for forgings. The clamping device includes an operating table, a support plate disposed on the operating table, and a cylinder disposed above the support plate. The output end of the cylinder is provided with a clamping claw. It also includes: a rotary table rotatably disposed on the support plate and located directly below the clamping claw, the rotary table being used to support the forging; a positioning component disposed on the rotary table for radial positioning of the forging; and an angle-fixing component disposed on the support plate and acting on the outer periphery of the rotary table for fixing the rotary table at any rotation angle. This invention, through the free rotation of the rotary table combined with the arbitrary angle locking of the angle-fixing component, overcomes the limitation of existing indexing disc devices that can only perform discrete angle adjustments according to preset equal divisions, significantly improving the angle adjustment flexibility and processing adaptability of the clamping device.

Description

Technical Field

[0001] This invention relates to a stepless angle adjustment clamping device for forgings and its clamping method. Background Technology

[0002] Forgings, as core basic components of mechanical equipment, are widely used in aerospace, automobile manufacturing, energy equipment, rail transportation and other fields. In the subsequent machining process of forgings, it is often necessary to perform multi-faceted and multi-angle cutting, grinding, drilling and other operations on the forgings. This requires the clamping device to be able to flexibly adjust the machining angle of the forgings according to the machining requirements.

[0003] In existing technologies, the angle adjustment and clamping of forgings mainly employs a fixed angle adjustment device with an indexing plate. Angle positioning is achieved through preset equally spaced holes or toothed groove structures, such as the common four-, six-, and eight-division indexing plate structures. After the operator rotates the workpiece to the preset fixed angle position, it is locked using a pin or chuck. While this type of device is simple in structure and reliable in locking, its angle adjustment is limited to the preset equally spaced positions, and it cannot achieve stepless adjustment of any angle. When processing requirements involve non-standard angles, this type of device cannot meet the requirements, severely restricting the processing flexibility of complex curved surfaces and irregularly shaped forgings.

[0004] Secondly, there are worm gear angle adjustment devices. These devices achieve rotation and self-locking of the rotary table through a worm gear transmission mechanism, theoretically allowing for stepless angle adjustment. However, worm gear mechanisms suffer from transmission backlash and return error, which worsens with prolonged use, leading to decreased angle positioning accuracy. Furthermore, the fixed transmission ratio of the worm gear results in slow adjustment speeds, making it inefficient for mass production scenarios requiring frequent changes in machining angles. Additionally, the locking mechanism relies entirely on the worm's self-locking characteristics, which poses a risk of self-locking failure under significant cutting forces, resulting in insufficient safety.

[0005] Therefore, there is an urgent need for a forging clamping device with a simple structure, capable of stepless angle adjustment and fast and reliable locking function, to meet the diversified and high-efficiency production needs of modern forging processing. Summary of the Invention

[0006] The purpose of this invention is to provide a stepless angle adjustment clamping device and clamping method for forgings, so as to solve the shortcomings of the prior art in which forgings cannot be quickly and flexibly adjusted to any angle during subsequent processing or there is a risk of self-locking failure.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a stepless angle adjustment clamping device for forgings, comprising an operating table, a support plate disposed on the operating table, and a cylinder disposed above the support plate, wherein the output end of the cylinder is provided with a clamping claw, and further comprising:

[0008] A rotary table is rotatably mounted on the support plate and located directly below the clamping jaws. The rotary table is used to support the forging.

[0009] A positioning component, disposed on the rotary table, is used for radial positioning of the forging; and

[0010] An angle fixing component is disposed on the bearing support plate and acts on the outer periphery of the rotary table to fix the rotary table at any rotation angle;

[0011] The forging is positioned on the rotary table by the positioning component. The clamping claw cooperates with the rotary table to clamp the forging. The rotary table drives the forging to rotate relative to the bearing support plate to the target angle, and then locks it by the angle fixing component.

[0012] Preferably, the angle fixing assembly includes a fixing plate disposed on the outer periphery of the rotary table, a positioning clamping plate disposed on the other side of the rotary table opposite to the fixing plate, and an adjusting bolt disposed on the side of the positioning clamping plate opposite to the fixing plate.

[0013] The supporting plate is provided with a positioning protrusion on the side of the positioning clamping plate. The positioning protrusion abuts against the adjusting bolt rod via an eccentric shaft. The outer periphery of the positioning protrusion is provided with a handle for driving its deflection.

[0014] An elastic reset member disposed between the fixed plate and the positioning protrusion is used to provide the reset of the positioning protrusion.

[0015] The handle is locked by driving the positioning cam plate against the outer peripheral wall of the rotary table via an eccentric shaft. The handle is also unlocked by rotating the eccentric shaft in the opposite direction to move the elastic reset member and the positioning cam plate away from the rotary table.

[0016] Preferably, the elastic reset member includes a guide rod located between the fixed plate and the positioning protrusion, and a reset spring is provided on the outer periphery of the guide rod;

[0017] The positioning protrusion has guide holes on both sides at corresponding positions on the guide rod, and the guide rod passes through the guide holes to allow the positioning protrusion to slide along the guide rod.

[0018] Preferably, the bearing support plate is provided with a guide plate, and the positioning protrusion is located inside the guide plate and slides linearly along the guide plate.

[0019] The positioning convex plate has a positioning groove on the wall facing the rotary table, and the side wall of the positioning groove is provided with a friction plate, and the inner wall of the friction plate is provided with several tiny protrusions.

[0020] Preferably, the outer wall of the rotary table is provided with a porous groove that matches the micro protrusion.

[0021] Preferably, the positioning component includes at least two sets of adjustment grooves disposed on the upper surface of the rotating platform, wherein a slide rod is disposed inside the adjustment groove, and a positioning support plate is connected to the outer periphery of the slide rod through a sliding sleeve, and the upper part of the positioning support plate is arranged in an inclined shape.

[0022] Preferably, a positioning spring is sleeved on the outer periphery of the slide rod, and the positioning spring is located on the outer wall side of the slide sleeve to provide elastic force to the positioning support plate toward the center of the rotary table.

[0023] Preferably, a rotating bushing is provided on the outer periphery of the rotating platform, and scale markings for indicating the rotation angle are provided on the outer periphery of the rotating platform.

[0024] Preferably, the positioning support plate has several positioning protrusions embedded on its inner wall side facing the center of the rotary table.

[0025] A clamping method for a stepless angle-adjustable clamping device for forgings includes the following steps:

[0026] S1. Place the forging on the upper surface of the rotary table, so that the center of the forging is roughly aligned with the rotation center of the rotary table; the inclined structure on the upper part of the positioning support plate guides the forging to slide down to the placement and clamping area between the four sets of adjustment slots. Under the elastic force of the positioning spring, the positioning support plate slides along the slide rod toward the center of the rotary table. The positioning protrusion on the inner wall of the positioning support plate abuts against the outer peripheral wall of the forging, thereby realizing the radial positioning and initial fixation of the forging on the rotary table.

[0027] S2. Start the cylinder. The output end of the cylinder drives the clamping claw to move downward. The lower end face of the clamping claw abuts against the upper end face of the forging. The clamping claw and the rotary table cooperate to clamp the forging from both the top and bottom directions, so that the forging is fixed in the clamping area between the clamping claw and the rotary table. At this time, the rotary table remains stationary under the support of the rotating bearing.

[0028] S3. Apply an external force to the rotary table, causing the rotary table to rotate relative to the bearing plate around the axis of the rotating bearing on the bearing plate. The rotary table drives the forging to rotate synchronously to the target machining angle.

[0029] S4. During the rotation process, the positioning support plate of the positioning component remains in radial contact with the forging under the continuous elastic force of the positioning spring, ensuring that the relative position of the forging and the rotary table remains unchanged.

[0030] S5. Locking Operation: Hold the handle and rotate it in the first direction. The handle drives the eccentric shaft to rotate, and the eccentric rotation of the positioning convex plate pushes the adjusting bolt. The adjusting bolt drives the positioning convex plate to overcome the elastic force of the return spring of the elastic reset component and slide linearly along the inner wall side of the guide rod and guide plate towards the rotary table. The positioning convex plate abuts against the outer peripheral wall of the rotary table on the wall side facing the rotary table. The tiny protrusions of the friction plate abut against the porous groove on the outer wall side of the rotary table to lock the rotation angle of the rotary table.

[0031] S6. Unlocking Operation: Hold the handle and rotate it in the opposite direction. The handle drives the positioning convex plate to rotate in the opposite direction through the eccentric shaft. The reset spring pushes the positioning convex plate to slide and reset along the guide hole in the opposite direction of the rotary table through the guide rod. The positioning convex plate disengages from the outer peripheral wall of the rotary table, and the tiny protrusions of the friction plate separate from the porous groove on the outer wall of the rotary table, thus releasing the lock on the rotary table.

[0032] In the above technical solution, the stepless angle adjustment clamping device and clamping method for forgings provided by the present invention have the following beneficial effects:

[0033] 1. This device, through the free rotation of the rotary table and the arbitrary angle locking of the angle fixing component, breaks through the limitation of existing indexing plate devices that can only perform discrete angle adjustments according to preset equal division positions. It can meet the processing needs of complex curved surfaces and irregular forgings involving non-standard angles, and significantly improves the angle adjustment flexibility and processing adaptability of the clamping device.

[0034] 2. Compared with the complex transmission mechanism of the worm gear angle adjustment device, this device adopts a mechanical locking structure composed of an eccentric shaft, a positioning cam, and an elastic reset component. It has fewer parts and a simpler assembly relationship, which effectively reduces the manufacturing, assembly, and maintenance costs of the device.

[0035] 3. The positioning cam plate generates a self-amplifying force effect through the eccentric rotation of the eccentric shaft. This, combined with the positioning groove, the tiny protrusions of the friction plate, and the multi-point frictional engagement with the porous grooves on the outer wall of the rotary table, creates a mechanical locking effect that tightens over time. Compared to worm gears that rely entirely on self-locking characteristics, this device is less prone to locking failure under high cutting forces, significantly improving the safety and reliability of the machining process.

[0036] 4. The elastic reset component (guide rod and reset spring) provides a stable reset force for the positioning convex plate. The guide plate ensures that the positioning convex plate slides accurately along a straight line, making the locking and unlocking actions smooth and controllable, with a clear operating feel, and avoiding operational errors caused by jamming.

[0037] 5. The positioning assembly adopts an elastic positioning structure with a sloping positioning support plate and a positioning spring. When the forging is placed, the sloping plate automatically guides it to the center position, and the positioning protrusion achieves multi-point radial contact. The positioning spring provides a continuous elastic positioning force, ensuring that the relative position of the forging and the rotary table remains unchanged during the rotation of the forging to the target angle. This ensures that the workpiece does not shift during angle adjustment and guarantees machining accuracy. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0039] Figure 1 This is a schematic diagram of the three-dimensional structure provided in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the load-bearing support plate structure provided in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the castrated structure of the rotary table provided in an embodiment of the present invention;

[0042] Figure 4 This is a top view schematic diagram of the bearing support plate after the rotating bushing has been castrated, as provided in an embodiment of the present invention.

[0043] Figure 5 This is a cross-sectional schematic diagram of the rotary table provided in an embodiment of the present invention;

[0044] Figure 6 This is an enlarged schematic diagram of the structure at point A provided in an embodiment of the present invention.

[0045] Explanation of reference numerals in the attached drawings: 1. Operating table; 2. Support plate; 3. Cylinder; 4. Clamping claw; 5. Rotary table; 51. Rotating bushing; 52. Scale mark; 6. Positioning assembly; 61. Adjustment groove; 62. Slide rod; 63. Sliding sleeve; 64. Positioning support plate; 65. Positioning spring; 66. Positioning protrusion; 7. Angle fixing assembly; 71. Fixing plate; 72. Positioning clamping plate; 721. Positioning clamping groove; 722. Guide hole; 73. Adjusting bolt; 74. Positioning protrusion; 75. Eccentric shaft; 76. Handle; 77. Elastic reset component; 771. Guide rod; 772. Reset spring; 78. Guide plate; 79. Friction plate. Detailed Implementation

[0046] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] Please see Figure 1-6 This invention provides a technical solution: a stepless angle adjustment clamping device for forgings, comprising an operating table 1, a support plate 2 disposed on the operating table 1, and a cylinder 3 disposed above the support plate 2. The output end of the cylinder 3 is provided with a clamping claw 4, and further comprising:

[0048] A rotating table 5 is rotatably mounted on the bearing support plate 2 and located directly below the clamping claw 4. The rotating table 5 is used to support the forging.

[0049] Positioning component 6, disposed on the rotary table 5, is used for radial positioning of the forging; and

[0050] An angle fixing component 7 is disposed on the bearing support plate 2 and acts on the outer periphery of the rotary table 5, for fixing the rotary table 5 at any rotation angle;

[0051] The forging is positioned on the rotary table 5 by the positioning component 6. The clamping claw 4 cooperates with the rotary table 5 to clamp the forging. After the rotary table 5 drives the forging to rotate relative to the bearing support plate 2 to the target angle, it is locked by the angle fixing component 7.

[0052] Furthermore, the angle fixing assembly 7 includes a fixing plate 71 disposed on the outer periphery of the rotary table 5, a positioning clamping plate 72 disposed on the other side of the rotary table 5 opposite to the fixing plate 71, and an adjusting bolt 73 disposed on the side of the positioning clamping plate 72 opposite to the fixing plate 71.

[0053] The supporting plate 2 is provided with a positioning protrusion 74 on the side of the positioning clamp 72. The positioning protrusion 74 abuts against the adjusting bolt 73 through an eccentric shaft 75. The outer periphery of the positioning protrusion 74 is provided with a handle 76 for driving its deflection; and

[0054] The elastic reset member 77 disposed between the fixed plate 71 and the positioning protrusion 74 is used to provide the reset of the positioning protrusion 74;

[0055] The handle 76 drives the positioning protrusion 74 to press against the outer peripheral wall of the rotary table 5 via the eccentric shaft 75 to lock it. The handle 76 rotates in the opposite direction via the eccentric shaft 75 to make the elastic reset member 77 connect the positioning protrusion 74 away from the rotary table 5 to release the lock.

[0056] Furthermore, the elastic reset member 77 includes a guide rod 771 located between the fixed plate 71 and the positioning protrusion 74, and a reset spring 772 is provided on the outer periphery of the guide rod 771;

[0057] The positioning protrusion 74 has guide holes 722 on both sides corresponding to the guide rod 771. The guide rod 771 passes through the guide holes 722 so that the positioning protrusion 74 slides along the guide rod 771.

[0058] Furthermore, the supporting plate 2 is provided with a guide plate 78, and the positioning protrusion 74 is located inside the guide plate 78 and slides linearly along the guide plate 78.

[0059] Furthermore, the positioning protrusion 74 has a positioning groove 721 on the wall facing the rotating table 5, and the side wall of the positioning groove 721 is provided with a friction plate 79, and the inner wall of the friction plate 79 is provided with several tiny protrusions.

[0060] The outer wall of the rotary table 5 is provided with a porous groove that matches the tiny protrusion.

[0061] Furthermore, the positioning component 6 includes at least two sets of adjustment grooves 61 disposed on the upper surface of the rotary table 5. A slide rod 62 is disposed inside the adjustment groove 61. A positioning support plate 64 is connected to the outer periphery of the slide rod 62 through a sliding sleeve 63. The upper part of the positioning support plate 64 is arranged in an inclined shape.

[0062] Furthermore, a positioning spring 65 is sleeved on the outer periphery of the slide rod 62, and the positioning spring 65 is located on the outer wall side of the slide sleeve 63, which is used to provide elastic force to the positioning support plate 64 toward the center of the rotary table 5.

[0063] Furthermore, a rotating support rod 51 is provided on the outer periphery of the rotating platform 5, and a scale pattern 52 for marking the rotation angle is provided on the outer periphery of the rotating platform 5.

[0064] Furthermore, the positioning support plate 64 is provided with a number of positioning protrusions 66 on the inner wall side facing the center of the rotary table 5.

[0065] A clamping method for a stepless angle-adjustable clamping device for forgings includes the following steps:

[0066] S1. Place the forging on the upper surface of the rotary table 5, so that the center of the forging is roughly aligned with the rotation center of the rotary table 5; the inclined structure on the upper part of the positioning support plate 64 guides the forging to slide down to the placement and clamping area between the four sets of adjustment grooves 61. Under the elastic force of the positioning spring 65, the positioning support plate 64 slides along the slide rod 62 toward the center of the rotary table 5. The positioning protrusion 66 on the inner wall side of the positioning support plate 64 abuts against the outer peripheral wall of the forging, realizing the radial positioning and preliminary fixation of the forging on the rotary table 5.

[0067] S2. Start the cylinder 3. The output end of the cylinder 3 drives the clamping claw 4 to move downward. The lower end face of the clamping claw 4 abuts against the upper end face of the forging. The clamping claw 4 and the rotary table 5 cooperate to clamp the forging from both the top and bottom directions, so that the forging is fixed in the clamping area between the clamping claw 4 and the rotary table 5. At this time, the rotary table 5 remains stationary under the support of the rotating bearing.

[0068] S3. Apply an external force to the rotary table 5, causing the rotary table 5 to rotate relative to the bearing support plate 2 around the axis of the rotating bearing. The rotary table 5 drives the forging to rotate synchronously to the target machining angle.

[0069] S4. During the rotation process, the positioning support plate 64 of the positioning component 6 remains in radial contact with the forging under the continuous elastic force of the positioning spring 65, ensuring that the relative position of the forging and the rotary table 5 remains unchanged.

[0070] S5. Locking Operation: Hold the handle 76 and rotate it in the first direction. The handle 76 drives the eccentric shaft 75 to rotate. The positioning convex plate 74 rotates eccentrically and pushes the adjusting bolt 73. The adjusting bolt 73 drives the positioning convex plate 74 to overcome the elastic force of the return spring 772 of the elastic reset member 77 and slide linearly along the inner wall side of the guide rod 771 and the guide plate 78 towards the rotary table 5. The positioning convex plate 74 abuts against the outer peripheral wall of the rotary table 5 on the wall side facing the rotary table 5. The tiny protrusions of the friction plate 79 abut against the porous groove on the outer wall side of the rotary table 5 to lock the rotation angle of the rotary table 5.

[0071] S6. Unlocking Operation: Hold the handle 76 and rotate it in the opposite direction. The handle 76 drives the positioning convex plate 74 to rotate in the opposite direction through the eccentric shaft 75. The reset spring 772 pushes the positioning convex plate 74 to slide and reset along the guide hole 722 toward the rotary table 5 through the guide rod 771. The positioning convex plate 74 disengages from the outer peripheral wall of the rotary table 5, and the tiny protrusion of the friction plate 79 separates from the porous groove on the outer wall side of the rotary table 5, thus releasing the lock on the rotary table 5.

[0072] In the above technical solution, the stepless angle adjustment clamping device and clamping method for forgings provided by the present invention have the following beneficial effects:

[0073] 1. This device, through the free rotation of the rotary table 5 and the arbitrary angle locking of the angle fixing component 7, breaks through the limitation of the existing indexing plate type device that can only perform discrete angle adjustment according to preset equal division positions. It can meet the processing needs of complex curved surfaces and irregular forgings involving non-standard angles, and significantly improves the angle adjustment flexibility and processing adaptability of the clamping device.

[0074] 2. Compared with the complex transmission mechanism of the worm gear angle adjustment device, this device adopts a mechanical locking structure composed of an eccentric shaft 75, a positioning cam 74 and an elastic reset component 77. The number of parts is small and the assembly relationship is simple, which effectively reduces the manufacturing, assembly and maintenance costs of the device.

[0075] 3. The positioning convex plate 74 generates a self-amplifying force effect through the eccentric rotation of the eccentric shaft 75. This, combined with the positioning groove 721, the micro-protrusions of the friction plate 79, and the multi-point frictional engagement with the porous grooves on the outer wall of the rotary table 5, creates a mechanical locking effect that tightens over time. Compared to worm gears that rely entirely on self-locking characteristics, this device is less prone to locking failure when subjected to large cutting forces, significantly improving the safety and reliability of the machining process.

[0076] 4. The elastic reset component 77 (guide rod 771 and reset spring 772) provides a stable reset force for the positioning convex plate 74. The guide plate 78 ensures that the positioning convex plate 74 slides accurately along a straight line, making the locking and unlocking actions smooth and controllable, with a clear operating feel, and avoiding operational errors caused by jamming.

[0077] 5. The positioning component 6 adopts an elastic positioning structure with a sloping positioning support plate 64 and a positioning spring 65. When the forging is placed, the sloping surface automatically guides it to the center position, and the positioning protrusion 66 achieves multi-point radial contact. The positioning spring 65 provides a continuous elastic positioning force, ensuring that the relative position between the forging and the rotary table 5 remains unchanged during the rotation of the forging to the target angle by the rotary table 5. This ensures that the workpiece does not shift during the angle adjustment process and guarantees machining accuracy.

[0078] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A stepless angle adjustment clamping device for forgings, comprising an operating table (1), a support plate (2) disposed on the operating table (1), and a cylinder (3) disposed above the support plate (2), wherein the output end of the cylinder (3) is provided with a clamping claw (4), characterized in that, Also includes: A rotating table (5) is rotatably mounted on the bearing support plate (2) and located directly below the clamping claw (4). The rotating table (5) is used to support the forging. A positioning component (6), disposed on the rotary table (5), is used for radial positioning of the forging; and An angle fixing component (7) is disposed on the bearing support plate (2) and acts on the outer periphery of the rotary table (5) to fix the rotary table (5) at any rotation angle; The forging is positioned on the rotary table (5) by the positioning component (6). The clamping claw (4) cooperates with the rotary table (5) to clamp the forging. The rotary table (5) drives the forging to rotate relative to the bearing support plate (2) to the target angle, and then locks it by the angle fixing component (7).

2. The stepless angle adjustment clamping device for forgings according to claim 1, characterized in that, The angle fixing component (7) includes a fixing plate (71) disposed on the outer periphery of the rotating platform (5), and a positioning clamp (72) disposed on the other side of the rotating platform (5) opposite to the fixing plate (71). An adjusting rod (73) is disposed on the side of the positioning clamp (72) away from the fixing plate (71). The supporting plate (2) is provided with a positioning protrusion (74) on the side of the positioning clamp (72). The positioning protrusion (74) abuts against the adjusting bolt (73) through an eccentric shaft (75). The outer periphery of the positioning protrusion (74) is provided with a handle (76) for driving its deflection. An elastic reset member (77) disposed between the fixed plate (71) and the positioning protrusion (74) is used to provide the reset of the positioning protrusion (74); The handle (76) drives the positioning cam (74) to press against the outer peripheral wall of the rotary table (5) and lock it in place via the eccentric shaft (75). The handle (76) rotates in the opposite direction via the eccentric shaft (75) so that the elastic reset member (77) connects to the positioning cam (74) away from the rotary table (5) to release the lock.

3. The stepless angle adjustment clamping device for forgings according to claim 2, characterized in that, The elastic reset member (77) includes a guide rod (771) located between the fixed plate (71) and the positioning protrusion (74), and a reset spring (772) is provided on the outer periphery of the guide rod (771). The positioning protrusion (74) has guide holes (722) on both sides corresponding to the guide rod (771). The guide rod (771) passes through the guide holes (722) so that the positioning protrusion (74) slides along the guide rod (771).

4. The stepless angle adjustment clamping device for forgings according to claim 2, characterized in that, The bearing support plate (2) is provided with a guide plate (78), and the positioning protrusion (74) is located inside the guide plate (78) and slides linearly along the guide plate (78).

5. The stepless angle adjustment clamping device for forgings according to claim 2, characterized in that, The positioning protrusion (74) has a positioning groove (721) on the wall facing the rotating table (5), and the side wall of the positioning groove (721) is provided with a friction plate (79), and the inner wall of the friction plate (79) is provided with several small protrusions. The outer wall of the rotating platform (5) is provided with a porous groove that matches the tiny protrusion.

6. The stepless angle adjustment clamping device for forgings according to claim 1, characterized in that, The positioning component (6) includes at least two sets of adjustment grooves (61) disposed on the upper surface of the rotary table (5). A slide rod (62) is disposed inside the adjustment groove (61). A positioning support plate (64) is connected to the outer periphery of the slide rod (62) through a sliding sleeve (63). The upper part of the positioning support plate (64) is arranged in an inclined shape.

7. The stepless angle adjustment clamping device for forgings according to claim 6, characterized in that, A positioning spring (65) is sleeved on the outer periphery of the slide rod (62), and the positioning spring (65) is located on the outer wall side of the slide sleeve (63) to provide elastic force to the positioning support plate (64) toward the center of the rotary table (5).

8. The stepless angle adjustment clamping device for forgings according to claim 1, characterized in that, The rotating platform (5) is provided with a rotating bushing (51) on its outer periphery, and a scale pattern (52) for marking the rotation angle is provided on the outer periphery of the rotating platform (5).

9. The stepless angle adjustment clamping device for forgings according to claim 8, characterized in that, The positioning support plate (64) has several positioning protrusions (66) embedded on the inner wall side facing the center of the rotating table (5).

10. A clamping method for a stepless angle-adjustable clamping device for forgings according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Place the forging on the upper surface of the rotary table (5) so that the center of the forging is roughly aligned with the rotation center of the rotary table (5); the inclined structure on the upper part of the positioning support plate (64) guides the forging to slide down to the placement and clamping area between the four sets of adjustment grooves (61). Under the elastic force of the positioning spring (65), the positioning support plate (64) slides along the slide rod (62) toward the center of the rotary table (5). The positioning protrusion (66) on the inner wall side of the positioning support plate (64) abuts against the outer peripheral wall of the forging, thereby realizing the radial positioning and initial fixation of the forging on the rotary table (5). S2. Start the cylinder (3). The output end of the cylinder (3) drives the clamping claw (4) to move downward. The lower end face of the clamping claw (4) abuts against the upper end face of the forging. The clamping claw (4) and the rotary table (5) cooperate to clamp the forging from both the top and bottom directions, so that the forging is fixed in the clamping area between the clamping claw (4) and the rotary table (5). At this time, the rotary table (5) remains stationary under the support of the rotating bearing. S3. Apply external force to the rotary table (5) so that the rotary table (5) rotates relative to the bearing support plate (2) around the axis of the rotating bearing. The rotary table (5) drives the forging to rotate synchronously to the target processing angle. S4. During the rotation process, the positioning support plate (64) of the positioning component (6) remains in radial contact with the forging under the continuous elastic force of the positioning spring (65), ensuring that the relative position of the forging and the rotary table (5) remains unchanged. S5, Locking Operation: Hold the handle (76) and rotate it in the first direction. The handle (76) drives the eccentric shaft (75) to rotate. The positioning convex plate (74) rotates eccentrically and pushes the adjusting bolt (73). The adjusting bolt (73) drives the positioning convex plate (74) to overcome the elastic force of the return spring (772) of the elastic reset member (77) and slide linearly along the inner wall side of the guide rod (771) and guide plate (78) towards the rotary table (5). The positioning convex plate (74) abuts against the outer peripheral wall of the rotary table (5) with the wall surface facing the rotary table (5). The tiny protrusion of the friction plate (79) abuts against the porous groove on the outer wall side of the rotary table (5) to lock the rotation angle of the rotary table (5). S6. Unlocking operation: Hold the handle (76) and rotate it in the opposite direction. The handle (76) drives the positioning convex plate (74) to rotate in the opposite direction through the eccentric shaft (75). The reset spring (772) pushes the positioning convex plate (74) to slide and reset in the opposite direction of the rotating table (5) through the guide rod (771). The positioning convex plate (74) disengages from the outer peripheral wall of the rotating table (5) and the tiny protrusion of the friction plate (79) separates from the porous groove on the outer wall of the rotating table (5), thus releasing the lock on the rotating table (5).

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