Clamping tool

Abstract

The utility model provides a clamping tool which is used for fixing a workpiece to be machined on a machine tool, the clamping tool comprises a clamping body and a fixing base, the machine tool is provided with a clamping jaw, the fixing base and the clamping jaw are coaxially arranged, the clamping jaw is used for clamping the fixing base, the clamping body is detachably connected with the fixing base, and the clamping body is detachably connected with the fixing base. The clamping body is arranged on the side, away from the machine tool, of the fixing base, the clamping body and the fixing base are coaxially arranged, and the clamping body is used for clamping the workpiece to be machined. The clamping body and the fixing base are arranged, the to-be-machined part is fixed to the clamping body and is coaxial with the clamping body, the fixing base and the clamping jaw, the to-be-machined part can be rapidly aligned after being overturned and clamped, the alignment difficulty of the to-be-machined part is lowered, the time consumed for alignment of the to-be-machined part can be shortened, and then the machining efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of axial compressor moving blade processing, and specifically relates to a clamping tool. Background Art

[0002] Axial flow compressors are widely used in jet engines or industrial gas turbines, air flow separation devices, dust collectors, vacuum pumps, wind tunnels, gas oxidation and deoxygenation devices, pipeline pressure delivery devices, etc. Axial flow compressors are compressors in which the working gas flows along the rotating axis of the rotor. Compared with centrifugal compressors in which the working gas flows perpendicularly to the rotating axis of the rotor, the radial flow rate is large and the pressure ratio is high.

[0003] The moving blade is one of the main components of the axial compressor. The processing quality of this component directly affects the working performance of the unit. For the processing of the moving blade, ordinary lathe processing is currently mostly used to mill the positive and negative surfaces of the brake blade one by one. Since two sets of tooling are required for milling the positive and negative surfaces of the brake blade, the moving blade impeller needs to be clamped and aligned twice, which will consume a lot of time and have low processing efficiency. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present application is to provide a clamping tool that can quickly align the workpiece after it is flipped and clamped, thereby improving the processing efficiency.

[0005] In order to solve the above problems, the present application provides a clamping tool for fixing a workpiece to be processed on a machine tool, the clamping tool comprising a clamping body and a fixed base, the machine tool having a clamping claw, the fixed base being coaxially arranged with the clamping claw, the clamping claw being used to clamp the fixed base, the clamping body being detachably connected to the fixed base, the clamping body being arranged on a side of the fixed base away from the machine tool, the clamping body being coaxially arranged with the fixed base, and the clamping body being used to clamp the workpiece to be processed.

[0006] Optionally, the clamping body includes a first clamp and a second clamp, the workpiece to be processed is arranged between the first clamp and the second clamp, the first clamp, the workpiece to be processed and the second clamp are connected in sequence, and the workpiece to be processed is coaxially arranged with the first clamp and the second clamp.

[0007] Optionally, the fixed base has a limiting groove at one end close to the clamping body, the first clamp has a first boss at one end away from the workpiece to be processed, and the second clamp has a second boss at one end away from the workpiece to be processed, and the first boss and the second boss have the same diameter as the limiting groove.

[0008] Optionally, the working state of the clamping tool includes a first state and a second state. When the clamping tool is working in the first state, the first boss is embedded in the limit groove. When the clamping tool is working in the second state, the second boss is embedded in the limit groove.

[0009] Optionally, the clamping tool also includes a first positioning line and a second positioning line, the first positioning line is set on the outer peripheral wall of the clamping body, and the second positioning line is set on the outer peripheral wall of the fixed base, and when the clamping tool is working in the first state and the second state, the first positioning line coincides with the second positioning line.

[0010] Optionally, the clamping tool is provided with a plurality of threaded holes along the axial direction of the workpiece to be processed, and the plurality of threaded holes are evenly arranged along the circumferential direction of the workpiece to be processed. The clamping tool also includes a plurality of screws, and the plurality of screws are arranged in the plurality of threaded holes in a one-to-one correspondence.

[0011] Optionally, the plurality of threaded holes include a first threaded hole and a second threaded hole, wherein the first threaded hole penetrates the first clamp, the workpiece to be processed and the second clamp along the axial direction of the workpiece to be processed, and the second threaded hole penetrates the first clamp, the workpiece to be processed, the second clamp and the fixed base along the axial direction of the workpiece to be processed.

[0012] Optionally, the first threaded holes and the second threaded holes are alternately arranged along the circumferential direction of the workpiece to be processed.

[0013] Optionally, a diameter of the first threaded hole is smaller than a diameter of the second threaded hole.

[0014] Optionally, the first clamping body, the second clamping body and the fixed base are all hollow cylindrical with open upper and lower ends.

[0015] Beneficial Effects

[0016] The clamping tool provided in the embodiment of the utility model, by providing a clamping body and a fixed base and fixing the workpiece to be processed on the clamping body and coaxially arranging the clamping body, the fixed base and the clamping claws, can quickly align the workpiece to be processed after flipping and clamping, thereby reducing the difficulty of aligning the workpiece to be processed, thereby reducing the time consumed in aligning the workpiece to be processed, and further improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of the clamping tooling of the embodiment of the present application when milling the positive profile of the brake blade;

[0018] Figure 2It is a structural schematic diagram of a clamping tooling of an embodiment of the present application when milling the reverse profile of a brake blade;

[0019] Figure 3 It is a structural schematic diagram of the first clamping body of the embodiment of the present application when the positive profile of the brake blade is milled;

[0020] Figure 4 It is a schematic structural diagram of the second clamping body of the embodiment of the present application when the positive profile of the brake blade is milled;

[0021] Figure 5 This is a schematic diagram of the structure of a fixed base according to an embodiment of the present application;

[0022] Figure 6 This is a top view of the clamping tooling according to an embodiment of the present application.

[0023] The reference numerals are as follows:

[0024] 1. Clamping body; 11. First clamping body; 111. First boss; 12. Second clamping body; 121. Second boss; 2. Fixed base; 21. Limiting groove; 3. Clamping claw; 4. Workpiece to be processed; 5. First threaded hole; 6. Second threaded hole. DETAILED DESCRIPTION

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] See also Figures 1 to 6 As shown, according to an embodiment of the present application, a clamping tool is provided for fixing a workpiece 4 to be processed on a machine tool, the clamping tool comprises a clamping body 1 and a fixed base 2, the machine tool is provided with a clamping claw 3, the fixed base 2 is coaxially arranged with the clamping claw 3, the clamping claw 3 is used to clamp the fixed base 2, the clamping body 1 and the fixed base 2 are detachably connected, the clamping body 1 is arranged on a side of the fixed base 2 away from the machine tool, the clamping body 1 and the fixed base 2 are coaxially arranged, and the clamping body 1 is used to clamp the workpiece 4 to be processed.

[0030] The clamping tool provided in the embodiment of the utility model can quickly clamp and align the turned workpiece 4 by providing a clamping body 1 and a fixed base 2, and fixing the workpiece 4 on the clamping body 1 and coaxially arranging the clamping body 1, the fixed base 2 and the clamping claw 3, thereby reducing the difficulty of aligning the workpiece 4, thereby reducing the time consumed for aligning the workpiece 4, and thus improving the processing efficiency.

[0031] The workpiece 4 to be processed may be a moving blade impeller of an axial flow compressor.

[0032] The clamping tool comprises a clamping body 1, which is used to fix the workpiece 4 to be processed. By setting the clamping body 1, a stable setting position is provided for the workpiece 4 to be processed, thereby improving the processing quality.

[0033] Specifically, the clamping body 1 can be a mechanical clamp, a hydraulic clamp, a pneumatic clamp, an electromagnetic clamp, a mold clamp, etc., and this application does not make further limitations. In the embodiment of this application, the clamping body 1 is a mold clamp. Before the clamping body 1 clamps the workpiece 4 to be processed, it is necessary to align the clamping body 1 and the workpiece 4 to be processed so that the axial degrees of the clamping body 1 and the workpiece 4 are consistent.

[0034] The clamping tool further includes a fixed base 2, which is used to fix the clamping body 1. The fixed base 2 provides a stable setting position for the clamping body 1, thereby improving the processing quality.

[0035] The fixed base 2 may be a truncated table or a disk, etc., which is not further limited in this application. In the embodiment of this application, the fixed base 2 is a truncated table, and the fixed base 2 is arranged on a machine tool.

[0036] Specifically, the machine tool is provided with a clamping jaw 3, which is used to clamp the fixed base 2 and drive the fixed base 2 to rotate. When the fixed base 2 rotates, the workpiece 4 to be processed can be driven to rotate through the clamping body 1 connected to the fixed base 2. Before the clamping jaw 3 clamps the fixed base 2, the clamping jaw 3 and the fixed base 2 need to be aligned so that the axial degrees of the clamping jaw 3 and the fixed base 2 are consistent.

[0037] A clamping claw 3 extends from one end of the fixed base 2 away from the machine tool and is detachably connected to the clamping body 1 .

[0038] Specifically, the connection method between the clamping body 1 and the fixed base 2 can be bolt connection, threaded connection or mortise and tenon connection, etc. As long as the axiality of the clamping body 1 and the fixed base 2 is ensured to be consistent after connection, this application does not make further limitations.

[0039] It can be understood that the clamping tooling provided in the embodiment of the present application, by providing a clamping body 1 and a fixed base 2, can convert the alignment of the workpiece 4 to be processed and the claw 3 into the alignment of the clamping body 1 and the fixed base 2, thereby reducing the difficulty of aligning the workpiece 4 to be processed, shortening the time consumed in aligning the workpiece 4 to be processed, and improving the processing efficiency.

[0040] Among them, when the workpiece 4 to be processed is a moving blade impeller, it is only necessary to align the moving blade impeller and the clamping body 1 when the clamping body 1 clamps the moving blade impeller, and then fix the clamping body 1 on the fixed base 2, and then the profile milling of one side of the moving blade can be carried out. When flipping the fixture body, that is, flipping the moving blade impeller, there is no need to perform secondary alignment, and the profile milling of the other side of the moving blade can be carried out directly. Compared with the related technology that uses two sets of tooling to mill the positive and negative surfaces of the brake blade, it is necessary to align twice, which improves the processing efficiency.

[0041] In the above embodiment, the clamping body 1 includes a first clamp 11 and a second clamp 12, the workpiece 4 to be processed is arranged between the first clamp 11 and the second clamp 12, the first clamp 11, the workpiece 4 to be processed and the second clamp 12 are connected in sequence, and the workpiece 4 to be processed is coaxially arranged with the first clamp 11 and the second clamp 12.

[0042] By setting the first clamp 11 and the second clamp 12 and setting the workpiece 4 to be processed between the first clamp 11 and the second clamp 12, the workpiece 4 to be processed can be quickly clamped and aligned after being turned over, thereby improving the processing efficiency; at the same time, it can avoid direct contact between the workpiece 4 and the fixed base 2, thereby avoiding indentations on the surface of the workpiece 4 to be processed, thereby improving the yield rate of the workpiece.

[0043] The first clamping body 11 may be an upper clamping body, and the first clamping body 11 is arranged on a side of the workpiece 4 to be processed away from the machine tool.

[0044] The second clamping body 12 may be a lower clamping body, and the second clamping body 12 is disposed on a side of the workpiece 4 to be processed close to the machine tool.

[0045] Specifically, the first clamp 11 and the second clamp 12 are molds for clamping the workpiece 4, and the workpiece 4 is disposed between the first clamp 11 and the second clamp 12, so that the workpiece 4 can be clamped when the first clamp 11 and the second clamp 12 are connected. It is understood that before the first clamp 11 and the second clamp 12 clamp the workpiece 4, the workpiece 4 should be aligned with the first clamp 11 and the second clamp 12, so that the axial degrees of the first clamp 11, the workpiece 4 and the second clamp 12 are consistent.

[0046] Among them, in the embodiment of the present application, the workpiece 4 to be processed is a moving blade impeller, the side of the moving blade impeller close to the first clamp 11 is the positive surface of the moving blade, and the side of the moving blade impeller close to the second clamp 12 is the negative surface of the moving blade.

[0047] In the above embodiment, the fixed base 2 has a limiting groove 21 at one end close to the clamping body 1, the first clamping body 11 has a first boss 111 at one end away from the workpiece 4 to be processed, and the second clamping body 12 has a second boss 121 at one end away from the workpiece 4 to be processed, and the first boss 111 and the second boss 121 have the same diameter as the limiting groove 21.

[0048] By providing the first boss 111, the second boss 121 and the limiting groove 21 and making the diameters of the first boss 111, the second boss 121 and the limiting groove 21 the same, the first boss 111 and the second boss 121 can both be embedded in the limiting groove 21, so as to achieve the purpose of quickly aligning the clamping body 1 and the fixed base 2 when milling the front and back surfaces of the moving blade, thereby improving the processing efficiency of the moving blade.

[0049] The first boss 111 may be in a circular shape.

[0050] The first boss 111 and the first clamping body 11 may be integrally formed.

[0051] The diameter of the first boss 111 is smaller than the diameter of the first clamping body 11 .

[0052] Specifically, the first boss 111 is disposed on a side of the first clamping body 11 away from the workpiece 4 to be processed, and the first boss 111 has the same axiality as the first clamping body 11 .

[0053] The second boss 121 may be in a circular shape.

[0054] The second boss 121 and the second clamping body 12 can be integrally formed.

[0055] The diameter of the second boss 121 is smaller than the diameter of the second clamping body 12 .

[0056] Specifically, the second boss 121 is disposed on a side of the second clamping body 12 away from the workpiece 4 to be processed, and the second boss 121 has the same axiality as the second clamping body 12 .

[0057] The limiting groove 21 may be an annular groove.

[0058] The diameter of the limiting groove 21 is smaller than the diameter of the fixing base 2 .

[0059] Specifically, the limiting groove 21 is provided at one end of the fixed base 2 away from the machine tool, and the axiality of the limiting groove 21 is consistent with that of the fixed base 2 .

[0060] The second boss 121 has the same diameter as the limiting groove 21. In the embodiment of the present application, the height of the second boss 121 is also the same as the depth of the limiting groove 21, so that when the positive surface of the moving blade is milled, the second boss 121 on the second clamping body 12 can be completely embedded in the limiting groove 21 of the fixed base 2, so that the clamping body 1 and the fixed base 2 can be quickly aligned, thereby improving the machining efficiency of the moving blade.

[0061] The diameter of the first boss 111 is the same as that of the limiting groove 21. In the embodiment of the present application, the height of the first boss 111 is also the same as the depth of the limiting groove 21, so that when the reverse surface of the moving blade is milled, the first boss 111 on the first clamping body 11 can be completely embedded in the limiting groove 21 of the fixed base 2, so that the clamping body 1 and the fixed base 2 can be quickly aligned, thereby improving the machining efficiency of the moving blade.

[0062] In the above embodiment, the working state of the clamping tool includes a first state and a second state. When the clamping tool is in the first state, the first boss 111 is embedded in the limiting groove 21. When the clamping tool is in the second state, the second boss 121 is embedded in the limiting groove 21.

[0063] Wherein, when the clamping tool is in the first state, the reverse surface of the brake blade is milled.

[0064] Among them, when the clamping tool is in the second state, the positive surface of the brake blade is milled.

[0065] In some possible embodiments provided by the present disclosure, the clamping tool also includes a first positioning line and a second positioning line. The first positioning line is set on the outer peripheral wall of the clamping body 1, and the second positioning line is set on the outer peripheral wall of the fixed base 2. When the clamping tool is working in the first state and the second state, the first positioning line coincides with the second positioning line.

[0066] By setting the first positioning line and the second positioning line, the starting point of the profile processing can be quickly found after the clamping body 1 is turned over, thereby improving the processing quality of the workpiece 4 to be processed.

[0067] The first positioning line can be set on the outer wall of the clamping body 1 by gluing or etching.

[0068] The second positioning line can also be set on the outer peripheral wall of the fixed base 2 by gluing or etching.

[0069] Specifically, the first positioning line and the second positioning line both extend along the axial direction of the workpiece 4 to be processed. In the embodiment of the present application, after the workpiece 4 to be processed is fixed on the clamping body 1, the first positioning line and the second positioning line are respectively etched on the clamping body 1 and the fixed base 2, and the first positioning line and the second positioning line are collinear; when the clamping body 1 is flipped over and the clamping body 1 and the fixed base 2 are reconnected, it is necessary to observe whether the first positioning line and the second positioning line are collinear. If the first positioning line and the second positioning line are collinear, the clamping body 1 and the fixed base 2 can be connected; otherwise, the clamping body 1 is rotated until the first positioning line on the clamping body 1 is collinear with the second positioning line on the fixed base 2. By observing the first positioning line and the second positioning line, it can be determined whether the starting point of the profile processing of the workpiece 4 to be processed is the same before and after the clamping body 1 is flipped over.

[0070] In some possible embodiments provided by the present disclosure, a plurality of threaded holes are opened on the clamping tool along the axial direction of the workpiece 4 to be processed, and the plurality of threaded holes are evenly arranged along the circumferential direction of the workpiece 4 to be processed. The clamping tool also includes a plurality of screws, and the plurality of screws are arranged in the plurality of threaded holes in a one-to-one correspondence.

[0071] By opening a plurality of threaded holes along the axial direction of the workpiece 4 to be processed on the clamping tool, and arranging the plurality of threaded holes evenly along the circumferential direction of the workpiece 4 to be processed, a stable insertion position is provided for a plurality of screws, so that the screws cooperate with the threaded holes to fix the clamping body 1 and the fixed base 2; at the same time, a plurality of screws are arranged one by one in the plurality of threaded holes to improve the connection strength between the clamping body 1 and the fixed base 2, thereby improving the working stability of the clamping tool.

[0072] In some possible embodiments provided by the present disclosure, the plurality of threaded holes include a first threaded hole 5 and a second threaded hole 6, the first threaded hole 5 passes through the first clamp 11, the workpiece 4 and the second clamp 12 along the axial direction of the workpiece 4, and the second threaded hole 6 passes through the first clamp 11, the workpiece 4, the second clamp 12 and the fixed base 2 along the axial direction of the workpiece 4.

[0073] The first threaded hole 5 is inserted with a screw to connect the first clamp 11 , the workpiece 4 and the second clamp 12 .

[0074] The screw inserted into the second threaded hole 6 is used to connect the first clamp 11 , the workpiece 4 , the second clamp 12 and the fixed base 2 , that is, the screw inserted into the second threaded hole 6 is used to connect the clamping body 1 and the fixed base 2 .

[0075] In some possible embodiments provided by the present disclosure, the first threaded holes 5 and the second threaded holes 6 are alternately arranged along the circumferential direction of the workpiece 4 to be processed.

[0076] By arranging the first threaded holes 5 and the second threaded holes 6 in a staggered manner along the circumferential direction of the workpiece 4, it is possible to ensure that the first clamp 11, the workpiece 4 and the second clamp 12 have good connection strength, while ensuring that the clamping body 1 and the fixed base 2 also have good connection strength, thereby improving the stability of the clamping tooling.

[0077] There is a second threaded hole 6 between two adjacent first threaded holes 5 .

[0078] Among them, the first threaded hole 5 is located between two adjacent second threaded holes 6 .

[0079] In some possible embodiments provided by the present disclosure, the diameter of the first threaded hole 5 is smaller than the diameter of the second threaded hole 6 .

[0080] The diameter of the first threaded hole 5 is smaller than that of the second threaded hole 6, that is, the diameter of the screw inserted into the first threaded hole 5 is also smaller than the diameter of the screw inserted into the second threaded hole 6. It can be understood that the larger the diameter of the screw, the greater the connection strength.

[0081] Specifically, the screw inserted into the first threaded hole 5 is used to connect the first clamp 11, the workpiece 4, and the second clamp 12; the screw inserted into the second threaded hole 6 is used to connect the first clamp 11, the workpiece 4, the second clamp 12, and the fixed base 2. In the embodiment of the present application, by setting the diameter of the screw inserted into the second threaded hole 6 to be larger than the diameter of the screw inserted into the first threaded hole 5, the connection strength between the clamp body 1 and the fixed base 2 can be improved, thereby improving the stability of the clamping tooling.

[0082] In some possible embodiments provided by the present disclosure, the first clamp body 11 , the second clamp body 12 and the fixed base 2 are all hollow cylindrical with open upper and lower ends.

[0083] By configuring the first clamp body 11, the second clamp body 12 and the fixed base 2 to be hollow cylindrical shapes with upper and lower ends open, the manufacturing cost of the clamping tool can be reduced, which has good economic benefits; at the same time, it is convenient for workers to maintain the clamping tool.

[0084] The clamping tool provided in the embodiment of the utility model can quickly clamp and align the turned workpiece 4 by providing a clamping body 1 and a fixed base 2, and fixing the workpiece 4 on the clamping body 1 and coaxially arranging the clamping body 1, the fixed base 2 and the clamping claw 3, thereby reducing the difficulty of aligning the workpiece 4, thereby reducing the time consumed for aligning the workpiece 4, and thus improving the processing efficiency.

[0085] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0086] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A clamping tool, characterized in that: Used to fix a workpiece (4) to be processed on a machine tool, the clamping tool comprises a clamping body (1) and a fixed base (2), the machine tool is provided with a clamping claw (3), the fixed base (2) and the clamping claw (3) are coaxially arranged, the clamping claw (3) is used to clamp the fixed base (2), the clamping body (1) and the fixed base (2) are detachably connected, the clamping body (1) is arranged on a side of the fixed base (2) away from the machine tool, the clamping body (1) and the fixed base (2) are coaxially arranged, and the clamping body (1) is used to clamp the workpiece (4) to be processed.

2. The clamping tool according to claim 1, characterized in that: The clamping body (1) comprises a first clamping body (11) and a second clamping body (12); the workpiece (4) to be processed is arranged between the first clamping body (11) and the second clamping body (12); the first clamping body (11), the workpiece (4) to be processed and the second clamping body (12) are connected in sequence; the workpiece (4) to be processed is coaxially arranged with the first clamping body (11) and the second clamping body (12).

3. The clamping tool according to claim 2, characterized in that: The fixed base (2) has a limiting groove (21) at one end close to the clamping body (1), the first clamping body (11) has a first boss (111) at one end away from the workpiece (4) to be processed, and the second clamping body (12) has a second boss (121) at one end away from the workpiece (4) to be processed, and the first boss (111) and the second boss (121) have the same diameter as the limiting groove (21).

4. The clamping tool according to claim 3, characterized in that: The working state of the clamping tool comprises a first state and a second state. When the clamping tool is in the first state, the first boss (111) is embedded in the limiting groove (21). When the clamping tool is in the second state, the second boss (121) is embedded in the limiting groove (21).

5. The clamping tool according to claim 4, characterized in that: The clamping tool also includes a first positioning line and a second positioning line, the first positioning line is arranged on the outer peripheral wall of the clamping body (1), and the second positioning line is arranged on the outer peripheral wall of the fixed base (2), and when the clamping tool is in the first state and the second state, the first positioning line coincides with the second positioning line.

6. The clamping tool according to claim 2, characterized in that: The clamping tool is provided with a plurality of threaded holes along the axial direction of the workpiece (4) to be processed, and the plurality of threaded holes are evenly arranged along the circumferential direction of the workpiece (4) to be processed. The clamping tool also includes a plurality of screws, and the plurality of screws are arranged in a one-to-one correspondence in the plurality of threaded holes.

7. The clamping tool according to claim 6, characterized in that: The plurality of threaded holes include a first threaded hole (5) and a second threaded hole (6), wherein the first threaded hole (5) penetrates the first clamp (11), the workpiece (4) and the second clamp (12) along the axial direction of the workpiece (4), and the second threaded hole (6) penetrates the first clamp (11), the workpiece (4), the second clamp (12) and the fixed base (2) along the axial direction of the workpiece (4).

8. The clamping tool according to claim 7, characterized in that: The first threaded holes (5) and the second threaded holes (6) are arranged alternately along the circumferential direction of the workpiece (4) to be processed.

9. The clamping tool according to claim 7, characterized in that: The diameter of the first threaded hole (5) is smaller than the diameter of the second threaded hole (6).

10. The clamping tool according to claim 2, characterized in that: The first clamping body (11), the second clamping body (12) and the fixed base (2) are all hollow cylindrical with open upper and lower ends.

Images