A double-dowel head vane clamp

Abstract

The application discloses a double-circular-tenon-blade clamp, which comprises a main spindle end clamp and a secondary spindle end clamp; the main spindle end clamp comprises a main base used for being connected with a main spindle end workbench and a rear-pulling type circular chuck arranged on the main base; and the secondary spindle end clamp comprises a secondary base used for being connected with a secondary spindle end workbench and a thrust type circular chuck arranged on the secondary base. The double-circular-tenon-blade clamp disclosed by the application adopts the rear-pulling type circular chuck at one end and the thrust type circular chuck at the other end, uses the clamp to clamp the two end tenons of a blade blank, the rear-pulling type circular chuck can pull and clamp and fix the tenon at one end, the thrust type circular chuck only applies a radial clamping force to the tenon at the other end, so that the blade blank cannot generate stress along the length direction after being clamped, and thus the deformation along the length direction is avoided, and the machining precision and the overall quality of the blade are ensured.

Description

Technical Field

[0001] This invention relates to the field of blade tooling fixture technology, and in particular to a double-round tenon blade fixture. Background Technology

[0002] Currently, the engines widely used in the aviation field are mainly turbine engines. The compressor and fan blades of these engines are difficult to manufacture, especially since aero-engines require high thrust-to-weight ratios, high blade design precision, and lightweight construction, often employing thin-walled structures and lightweight materials such as titanium alloys. The specific characteristics of aero-engine blade manufacturing are: thin-walled structures with complex free-form surfaces; to improve aerodynamic performance, the blade surfaces are subject to severe twisting, exhibiting characteristics such as bending, twisting, and sweeping; and high machining precision. These characteristics place extremely high demands on the clamping process before blade machining. Existing technologies use general-purpose clamps to fix both ends of double-round tenon blades, which generates stress along the length of the blade blank during clamping, causing deformation and affecting the machining accuracy and overall quality of the blade. Summary of the Invention

[0003] The present invention addresses the above-mentioned problems by proposing a double-round tenon blade clamp.

[0004] The technical means employed in this invention are as follows:

[0005] A double-round tenon blade clamp includes a main spindle end clamp and a secondary spindle end clamp;

[0006] The main spindle end clamp includes: a main base for connecting to the main spindle end worktable and a pull-back circular chuck disposed on the main base;

[0007] The sub-spindle end clamp includes: a sub-base for connecting to the sub-spindle end worktable and a thrust-type circular chuck disposed on the sub-base.

[0008] Furthermore, the main base is also provided with a main spindle end auxiliary clamping structure, which includes a first single-acting hydraulic cylinder and a first universal support head disposed on the piston rod of the first single-acting hydraulic cylinder.

[0009] Furthermore, the sub-base is also provided with a sub-spindle end auxiliary clamping structure, which includes a second single-acting hydraulic cylinder and a second universal support head disposed on the piston rod of the second single-acting hydraulic cylinder.

[0010] Furthermore, the pull-back circular chuck includes a first chuck cylinder, a plurality of first chuck jaws, and a first chuck jaw drive assembly;

[0011] The first chuck cylinder has a first chuck mounting cavity. One end of the first chuck mounting cavity is a chuck claw mounting end, and the other end is a chuck claw driving end. A tapered first chuck claw driving surface is provided on the inner wall of the end of the first chuck cylinder near the chuck claw mounting end.

[0012] The first chuck jaw drive assembly includes a first chuck jaw drive sleeve and a first connecting plate. The first chuck jaw drive sleeve is placed in the first chuck mounting cavity and can move along the axis of the first chuck mounting cavity. The first connecting plate is installed at one end of the first chuck jaw drive sleeve near the chuck jaw drive end. The inner diameter of the first chuck jaw drive sleeve near the chuck jaw mounting end is provided with a first chuck jaw connecting boss protruding inward in the direction of the inner diameter.

[0013] The first chuck jaw is installed in the cavity at one end of the first chuck mounting cavity near the chuck jaw mounting end. The outer wall surface of the first chuck jaw is a conical surface, and a first slot is provided on the outer wall surface of the first chuck jaw. The first chuck jaw connecting boss is connected to the first slot. When the first chuck jaw driving sleeve drives the first chuck jaw to move towards the chuck jaw driving end, the first chuck jaw driving surface interacts with the outer wall surface of the first chuck jaw, thereby driving the first chuck jaw to move inward along the radial direction of the first chuck mounting cavity.

[0014] Furthermore, the pull-back circular chuck also includes a first bottom positioning block, which is fixedly installed inside the first chuck claw drive sleeve.

[0015] Furthermore, the thrust-type circular chuck includes a second chuck cylinder, a plurality of second chuck jaws, and a second chuck jaw drive assembly;

[0016] The second chuck cylinder has a second chuck mounting cavity, one end of which is a chuck claw mounting end, and the other end is a chuck claw driving end;

[0017] The second chuck jaw drive assembly includes a second chuck jaw drive sleeve and a second connecting plate. The second chuck jaw drive sleeve is placed in the second chuck mounting cavity and can move along the axis of the second chuck mounting cavity. The second connecting plate is installed at one end of the second chuck jaw drive sleeve near the chuck jaw drive end. The inner wall surface of the end of the second chuck jaw drive sleeve near the chuck jaw mounting end is a tapered second chuck jaw drive surface.

[0018] The second chuck jaw is installed in the cavity of the second chuck jaw drive sleeve near the chuck jaw mounting end. The outer wall surface of the second chuck jaw is a tapered surface. When the second chuck jaw drive sleeve drives the second chuck jaw to move towards the chuck jaw mounting end, the second chuck jaw drive surface interacts with the outer wall surface of the second chuck jaw, thereby driving the second chuck jaw to move inward along the radial direction of the second chuck mounting cavity.

[0019] Furthermore, the thrust-type circular chuck also includes a second bottom positioning block, which is fixedly installed inside the second chuck claw drive sleeve.

[0020] Furthermore, a second slot is provided on the outer wall of the second chuck claw, and a second chuck claw connecting boss is provided on the inner wall of the cavity near the mounting end of the chuck claw inside the second chuck claw drive sleeve. The second chuck claw connecting boss is inserted into the second slot.

[0021] Furthermore, the main base is also provided with a pull-back circular chuck self-aligning structure, which includes a plurality of first set screw mounting seats evenly distributed circumferentially on the end face of the main base and a first set screw disposed on the first set screw mounting seat.

[0022] Furthermore, the sub-base is also provided with a thrust-type circular chuck self-aligning structure, which includes a plurality of second set screw mounting seats evenly distributed circumferentially on the end face of the sub-base and a second set screw disposed on the second set screw mounting seats.

[0023] Compared with the prior art, the double-round tenon blade clamp disclosed in this invention has the following beneficial effects: Since the double-round tenon blade clamp disclosed in this invention adopts a pull-back round chuck at one end and a thrust-type round chuck at the other end, the clamp is used to clamp the tenons at both ends of the blade blank. The pull-back round chuck can pull the tenon at one end backward and clamp it in place, while the thrust-type round chuck only applies radial clamping force to the tenon at the other end. Therefore, the blade blank will not generate stress along the length direction after being clamped, thereby avoiding deformation along the length direction and ensuring the processing accuracy and overall quality of the blade. Attached Figure Description

[0024] Figure 1 This is a front view of the double-round tenon blade clamp disclosed in this invention;

[0025] Figure 2 This is a cross-sectional view of the double-round tenon blade clamp disclosed in this invention;

[0026] Figure 3 This is a front view of the pull-back circular chuck in the double-round tenon blade clamp disclosed in this invention;

[0027] Figure 4 This is a top view of the pull-back circular chuck in the double-round tenon blade clamp disclosed in this invention;

[0028] Figure 5 This is a cross-sectional view of the pull-back circular chuck in the double-round tenon blade clamp disclosed in this invention;

[0029] Figure 6 This is a front view of the push-type circular chuck of the double-round tenon blade clamp disclosed in this invention;

[0030] Figure 7 This is a top view of the push-type circular chuck of the double-round tenon blade clamp disclosed in this invention;

[0031] Figure 8 This is a cross-sectional view of the push-type circular chuck of the double-round tenon blade clamp disclosed in this invention.

[0032] In the diagram: A. Main spindle end clamp; A1. Main base; 1. Rear-pull circular chuck; 10. First chuck cylinder body; 100. First chuck mounting cavity; 101. Chuck jaw mounting end; 102. Chuck jaw drive end; 103. First chuck jaw drive surface; 11. First chuck jaw; 110. First chuck groove; 12. First chuck jaw drive assembly; 120. First chuck jaw drive sleeve; 121. First connecting plate; 122. First chuck jaw connecting boss; 13. First bottom positioning block; 130. First V-groove; 15. Main spindle end auxiliary clamping structure; 150. First single-acting hydraulic cylinder; 151. First universal support head; 16. Rear-pull circular chuck self-aligning structure; 160. First set screw mounting seat; 161. First set screw; B. Sub-spindle End clamp, B1, sub-base, 2, thrust-type circular chuck, 20, second chuck cylinder body, 200, second chuck mounting cavity, 21, second chuck jaw, 210, second chuck groove, 22, second chuck jaw drive assembly, 220, second chuck jaw drive sleeve, 221, second connecting plate, 222, second chuck jaw drive surface, 223, second chuck jaw connecting boss, 23, second bottom positioning block, 230, second V-groove, 25, auxiliary clamping structure at the sub-spindle end, 250, second single-acting hydraulic cylinder, 251, second universal support head, 26, thrust-type circular chuck self-aligning structure, 260, second set screw mounting seat, 261, second set screw, 30, main spindle end worktable, 31, sub-spindle end worktable, 4, blade, 5, hydraulic control check valve. Detailed Implementation

[0033] like Figure 1 and Figure 2 The image shows a double-round tenon blade clamp disclosed in this invention, including a main spindle end clamp A and a secondary spindle end clamp B;

[0034] The main spindle end clamp A includes: a main base A1 for connecting to the main spindle end worktable 30 and a pull-back circular chuck 1 disposed on the main base A1;

[0035] The sub-spindle end clamp B includes: a sub-base B1 for connecting to the sub-spindle end worktable 31 and a thrust-type circular chuck 2 disposed on the sub-base B1.

[0036] Specifically, such as Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the pull-back circular chuck 1 includes a first chuck cylinder 10, a plurality of first chuck claws 11, and a first chuck claw drive assembly 12.

[0037] The first chuck cylinder body 10 has a first chuck mounting cavity 100. One end of the first chuck mounting cavity 100 is a chuck claw mounting end 101, and the other end is a chuck claw driving end 102. The inner wall of the first chuck cylinder body 10 near the chuck claw mounting end 101 is provided with a tapered first chuck claw driving surface 103. The chuck claw mounting end 101 is the end with chuck claws, and the chuck claw driving end 102 is the end with a driving device that can drive the first chuck claw driving assembly 12 to move.

[0038] The first chuck jaw drive assembly 12 includes a first chuck jaw drive sleeve 120 and a first connecting plate 121. One end of the first chuck jaw drive sleeve 120 has an internal thread on its inner wall, and the outer wall of the first connecting plate 121 has an external thread. The first connecting plate 121 and the first chuck jaw drive sleeve 120 can be threadedly connected. The first connecting plate 121 can be connected to the drive end of a power device. In this embodiment, the power device is a hydraulic cylinder, which is located in the main base A1. Specifically, the main base A1 has an oil chamber and a piston rod, etc. The piston rod extends from one end of the main base A1 and can connect to the first connecting plate 121. The first connecting plate has a through hole in the center, through which a bolt can pass and connect to the end of the piston rod. The reciprocating motion of the piston rod can drive the first connecting plate 121 and the first chuck claw drive sleeve 120 to reciprocate. The first chuck claw drive sleeve 120 is placed in the first chuck mounting cavity 100. When the piston rod can drive the first connecting plate 121 and the first chuck claw drive sleeve 120 to move along the axis of the first chuck mounting cavity 100 in the first chuck mounting cavity 100, the first chuck claw drive sleeve 120 has a first chuck claw connecting boss 122 protruding inward on the inner diameter of the end near the chuck claw mounting end 102.

[0039] Multiple first chuck jaws 11 are installed in the cavity of the first chuck mounting cavity 100 near the chuck jaw mounting end. In this embodiment, the number of first chuck jaws is 6. The outer wall surface of the first chuck jaw 11 is a conical surface, and a first chuck groove 110 is provided on the outer wall surface of the first chuck jaw 11. The first chuck jaw connecting boss 122 is connected to the first chuck groove 110. When the first chuck jaw driving sleeve 120 drives the first chuck jaw 11 to move towards the chuck jaw driving end 102, the first chuck jaw... The interaction between the chuck drive surface 103 and the outer wall surface of the first chuck jaw 11 drives the first chuck jaw 11 to move inward along the radial direction of the first chuck mounting cavity 100. That is, when the first chuck jaw drive sleeve 120 drives the first chuck jaw to move towards the chuck jaw drive end, the interaction between the first chuck cylinder and the two conical surfaces on the first chuck jaw causes the first chuck jaw to move inward along the radial direction while moving towards the chuck jaw drive end, thereby achieving the pull-back and clamping of the workpiece placed in the chuck jaw.

[0040] like Figure 6 , Figure 7 and Figure 8 As shown, the thrust-type circular chuck 2 includes a second chuck cylinder 20, a plurality of second chuck claws 21, and a second chuck claw drive assembly 22;

[0041] The second chuck cylinder body 20 has a second chuck mounting cavity 200, one end of which is the chuck claw mounting end and the other end is the chuck claw driving end;

[0042] The second chuck jaw drive assembly 22 includes a second chuck jaw drive sleeve 220 and a second connecting plate 221. The second chuck jaw drive sleeve 220 is placed in the second chuck mounting cavity 200 and can move along the axis of the second chuck mounting cavity 200 within the second chuck mounting cavity 200. The second connecting plate 221 is mounted on the end of the second chuck jaw drive sleeve 220 near the chuck jaw drive end. The inner wall surface of the end of the second chuck jaw drive sleeve 220 near the chuck jaw mounting end is a tapered second chuck jaw drive surface 222. The second chuck jaw drive sleeve 220 and the second chuck jaw drive sleeve 220 are connected. The connection method of the connecting plate 221, the connection method of the second connecting plate 221 and the auxiliary base B1 with the connection method of the first chuck claw drive sleeve and the first connecting plate, the first connecting plate and the main base are similar, that is, the inner diameter of one end of the second chuck claw drive sleeve is provided with an internal thread, the outer diameter of the second connecting plate is provided with an external thread, the second connecting plate and the second chuck claw drive sleeve are threadedly connected, the auxiliary base is provided with a hydraulic cylinder structure, the center of the second connecting plate is provided with a through hole, the second connecting plate can be connected to the piston rod end of the hydraulic cylinder by bolts, the piston rod of the hydraulic cylinder can drive the second chuck claw drive sleeve to move in the second chuck mounting cavity through the second connecting plate;

[0043] Multiple second chuck jaws 21 are installed in the cavity of the second chuck jaw drive sleeve 220 near the chuck jaw mounting end. In this embodiment, there are 6 second chuck jaws. The outer wall surface of the second chuck jaw 21 is a conical surface. When the second chuck jaw drive sleeve 220 drives the second chuck jaw 21 to move towards the chuck jaw mounting end, the second chuck jaw drive surface 222 interacts with the outer wall surface of the second chuck jaw 21, thereby driving the second chuck jaw 21 to move inward along the radial direction of the second chuck mounting cavity 200. That is, when the hydraulic cylinder drives the second chuck jaw drive sleeve to move towards the chuck jaw mounting end, the two conical surfaces of the second chuck jaw drive surface and the outer wall surface of the second chuck jaw interact and move inward in the radial direction, thereby realizing the clamping of the workpiece by the second chuck jaw.

[0044] The double-round tenon blade clamp disclosed in this invention uses a pull-back round chuck at one end and a thrust-type round chuck at the other end. Using this clamp, the round tenons at both ends of the blade blank can be clamped. First, the pull-back round chuck can pull the tenon at one end backward and clamp it in place. Then, the thrust-type round chuck can apply a radial clamping force only to the tenon at the other end. Therefore, the blade blank will not generate stress along the length direction after being clamped, thereby avoiding deformation along the length direction and ensuring the processing accuracy and overall quality of the blade.

[0045] Furthermore, such as Figure 1 and Figure 3 As shown, the main base A1 is also provided with a main spindle end auxiliary clamping structure 15, which includes a first single-acting hydraulic cylinder 150 and a first universal support head 151 disposed on the piston rod of the first single-acting hydraulic cylinder 150. Figure 1 and Figure 6 As shown, the auxiliary base B1 is also equipped with a secondary spindle end auxiliary clamping structure 25. The secondary spindle end auxiliary clamping structure 25 includes a second single-acting hydraulic cylinder 250 and a second universal support head 251 disposed on the piston rod of the second single-acting hydraulic cylinder 250. By setting the main spindle end auxiliary clamping structure and the secondary spindle end auxiliary clamping structure to provide auxiliary clamping and support at both ends of the blade blank, the firmness of its clamping is ensured, and the deformation of the thin-walled structural parts during processing is reduced, thus ensuring processing accuracy and overall quality. At the same time, the clamping force of the universal support head of the auxiliary clamping structure on the blade is achieved by the difference between hydraulic pressure and the built-in rectangular spring. The pressure detection function of the machine tool system can be used to adjust the auxiliary support force at any time according to the reaction force generated by the blade deformation, thereby counteracting the blade deformation and meeting the actual processing requirements.

[0046] Furthermore, such as Figure 5As shown, the pull-back circular chuck 1 further includes a first bottom positioning block 13, which is fixedly installed inside the first chuck claw drive sleeve 120. In this embodiment, the first chuck claw drive sleeve 120 has a stepped groove structure, wherein the end face of the stepped groove serves as the mounting surface of the first bottom positioning block, and the outer wall of the first bottom positioning block is provided with a first V-groove 130. Multiple pins are installed on the first chuck claw drive sleeve, and one end of each pin is inserted into the first V-groove on the outer wall of the first bottom positioning block to fix the first bottom positioning block.

[0047] like Figure 8 As shown, the thrust-type circular chuck 2 also includes a second bottom positioning block 23. The second bottom positioning block 23 is fixedly installed inside the second chuck jaw drive sleeve 220. The second chuck jaw drive sleeve also has a stepped groove structure, and the end face of the stepped groove is the mounting surface of the second bottom positioning block. A second V-groove 230 is provided on the outer wall of the second bottom positioning block. Multiple pins are installed on the second chuck jaw drive sleeve, and one end of each pin is inserted into the second V-groove 230 on the outer wall of the second bottom positioning block to fix the second bottom positioning block. By setting the bottom positioning block, it can be ensured that when the fixture clamps the workpiece, the end of the workpiece abuts against the end face of the bottom positioning block, thereby achieving bottom positioning of the workpiece, ensuring clamping accuracy, and thus improving machining accuracy.

[0048] Furthermore, a second groove 210 is provided on the outer wall surface of the second chuck jaw 21, and a second chuck jaw connecting boss 223 is provided on the inner wall of the cavity near the mounting end of the chuck jaw inside the second chuck jaw drive sleeve 220. The second chuck jaw connecting boss 223 is inserted into the second groove 210. The second chuck jaw connecting boss and the second groove can axially limit the second chuck jaw, thereby preventing the chuck jaw from disengaging from the chuck cylinder.

[0049] Furthermore, such as Figure 4 As shown, the main base A1 is also provided with a pull-back circular chuck self-aligning structure 16. The pull-back circular chuck self-aligning structure 16 includes a plurality of first set screw mounting seats 160 evenly distributed circumferentially on the end face of the main base A1 and first set screws 161 disposed on the first set screw mounting seats 160. Figure 7As shown, the auxiliary base B1 is also provided with a thrust-type circular chuck self-aligning structure 26. The thrust-type circular chuck self-aligning structure 26 includes multiple second set screw mounting seats 260 circumferentially distributed on the end face of the auxiliary base B1 and second set screws 261 disposed on the second set screw mounting seats 260. Specifically, the first set screw mounting seats and the second set screw mounting seats are respectively fixed to the main base and the auxiliary base by bolts. The set screw mounting seats are provided with set screws, and multiple set screws are circumferentially distributed on the outer side of the chuck cylinder body and abut against the outer wall of the chuck cylinder body. The chuck cylinder body is fixed to the base by bolts. When it is necessary to adjust the chuck so that the center of the chuck is concentric with the center of the worktable, the bolts can be loosened, and the set screws abut against the chuck cylinder body to adjust the position of the chuck cylinder body, thereby ensuring that the center of the chuck is concentric with the center of the worktable, thus ensuring clamping accuracy and improving machining accuracy. The pull-back circular chuck self-aligning structure and the thrust-type circular chuck self-aligning structure can be used to adjust the concentricity of the pull-back circular chuck with the main spindle end table and the thrust-type circular chuck with the auxiliary spindle end table, respectively.

[0050] Furthermore, the main spindle end clamp A and the auxiliary spindle end clamp B are equipped with hydraulic control check valves 5 connected in series in the hydraulic cylinder clamping oil circuit. The hydraulic control check valves can realize the pressure holding function of the clamping oil circuit, so as to avoid the clamps being unable to clamp the workpiece due to pump station abnormality or power outage or gas outage.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A double-round tenon blade clamp, characterized in that: Includes the main spindle end clamp and the auxiliary spindle end clamp; The main spindle end clamp includes: a main base for connecting to the main spindle end worktable and a pull-back circular chuck disposed on the main base; The secondary spindle end clamp includes: a secondary base for connecting to the secondary spindle end worktable and a thrust-type circular chuck disposed on the secondary base; when using the clamp to clamp the circular tenons at both ends of the blade blank, the tenon at one end is first pulled backward and clamped and fixed by the pull-back circular chuck, and then the thrust-type circular chuck is used to apply only radial clamping force to the tenon at the other end. The thrust-type circular chuck includes a second chuck cylinder, multiple second chuck jaws, and a second chuck jaw drive assembly. The second chuck cylinder has a second chuck mounting cavity, one end of which is a chuck claw mounting end, and the other end is a chuck claw driving end; The second chuck jaw drive assembly includes a second chuck jaw drive sleeve and a second connecting plate. The second chuck jaw drive sleeve is placed in the second chuck mounting cavity and can move along the axis of the second chuck mounting cavity. The second connecting plate is installed at one end of the second chuck jaw drive sleeve near the chuck jaw drive end. The inner wall surface of the end of the second chuck jaw drive sleeve near the chuck jaw mounting end is a tapered second chuck jaw drive surface. The second chuck jaw is installed in the cavity of the second chuck jaw drive sleeve near the chuck jaw mounting end. The outer wall surface of the second chuck jaw is a tapered surface. When the second chuck jaw drive sleeve drives the second chuck jaw to move towards the chuck jaw mounting end, the second chuck jaw drive surface interacts with the outer wall surface of the second chuck jaw, thereby driving the second chuck jaw to move inward along the radial direction of the second chuck mounting cavity.

2. The double-round tenon blade clamp according to claim 1, characterized in that: The main base is also provided with a main spindle end auxiliary clamping structure, which includes a first single-acting hydraulic cylinder and a first universal support head disposed on the piston rod of the first single-acting hydraulic cylinder.

3. The double-round tenon blade clamp according to claim 1 or 2, characterized in that: The sub-base is also provided with a sub-spindle end auxiliary clamping structure, which includes a second single-acting hydraulic cylinder and a second universal support head disposed on the piston rod of the second single-acting hydraulic cylinder.

4. The double-round tenon blade clamp according to claim 1, characterized in that: The pull-back circular chuck includes a first chuck cylinder, multiple first chuck jaws, and a first chuck jaw drive assembly. The first chuck cylinder has a first chuck mounting cavity. One end of the first chuck mounting cavity is a chuck claw mounting end, and the other end is a chuck claw driving end. A tapered first chuck claw driving surface is provided on the inner wall of the end of the first chuck cylinder near the chuck claw mounting end. The first chuck jaw drive assembly includes a first chuck jaw drive sleeve and a first connecting plate. The first chuck jaw drive sleeve is placed in the first chuck mounting cavity and can move along the axis of the first chuck mounting cavity. The first connecting plate is installed at one end of the first chuck jaw drive sleeve near the chuck jaw drive end. The inner diameter of the first chuck jaw drive sleeve near the chuck jaw mounting end is provided with a first chuck jaw connecting boss protruding inward in the direction of the inner diameter. The first chuck jaw is installed in the cavity at one end of the first chuck mounting cavity near the chuck jaw mounting end. The outer wall surface of the first chuck jaw is a conical surface, and a first slot is provided on the outer wall surface of the first chuck jaw. The first chuck jaw connecting boss is connected to the first slot. When the first chuck jaw driving sleeve drives the first chuck jaw to move towards the chuck jaw driving end, the first chuck jaw driving surface interacts with the outer wall surface of the first chuck jaw, thereby driving the first chuck jaw to move inward along the radial direction of the first chuck mounting cavity.

5. The double-round tenon blade clamp according to claim 4, characterized in that: The pull-back circular chuck also includes a first bottom positioning block, which is fixedly installed inside the first chuck claw drive sleeve.

6. The double-round tenon blade clamp according to claim 1, characterized in that: The thrust-type circular chuck also includes a second bottom positioning block, which is fixedly installed inside the second chuck claw drive sleeve.

7. The double-round tenon blade clamp according to claim 6, characterized in that: The outer wall of the second chuck claw is also provided with a second slot, and the inner wall of the cavity near the mounting end of the chuck claw inside the second chuck claw drive sleeve is also provided with a second chuck claw connecting boss, which is inserted into the second slot.

8. The double-round tenon blade clamp according to claim 1, characterized in that: The main base is also provided with a pull-back circular chuck self-aligning structure, which includes a plurality of first set screw mounting seats evenly distributed circumferentially on the end face of the main base and a first set screw mounted on the first set screw mounting seat.

9. The double-round tenon blade clamp according to claim 1, characterized in that: The sub-base is also provided with a thrust-resistant circular chuck self-aligning structure, which includes multiple second set screw mounting seats evenly distributed circumferentially on the end face of the sub-base and second set screws disposed on the second set screw mounting seats.

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