An auxiliary device for machining splines

Abstract

The present application relates to a kind of auxiliary devices for machining spline, including installation cylinder, first connecting component being arranged in one end of installation cylinder, and second connecting component being arranged in the other end of installation cylinder.The first connecting component is configured to be able to connect installation cylinder on chuck of machine tool.The second connecting component is configured to be able to fix torsion bar shaft inserted in installation cylinder, so as to make the effective length of torsion bar shaft reduce.Installation cylinder is configured to be able to buffer the vibration generated when torsion bar shaft is machined spline on machine tool.The auxiliary device can effectively reduce the deformation of torsion bar shaft during machining on the one hand, and the vibration generated during machining spline of torsion bar shaft can be buffered by installation cylinder on the other hand.In this way, the machining precision when machining spline on torsion bar shaft can be effectively improved, so that the spline machined can make torsion bar shaft and torsion bar arm cooperate more closely, and the stress of connecting part is more uniform, thereby improving the reliability of anti-side roll torsion bar.

Description

Technical Field

[0001] This invention relates to the field of spline machining technology, and more specifically to an auxiliary device for machining splines. Background Technology

[0002] With the increasing speed and comfort of rail transit operations in recent years, the reliability requirements for anti-roll torsion bar systems used in rail vehicles have also become increasingly stringent. For the entire anti-roll torsion bar system, the fit between the torsion arm and the torsion bar shaft is crucial to its reliability. To ensure ease of installation, a spline is typically used to detachably connect the torsion bar shaft and the torsion wall.

[0003] However, torsion bar shafts are slender rods, with their axial dimension much larger than their radial dimension. In existing technologies, when machining splines on torsion bar shafts using machine tools, the torsion bar shaft is prone to deformation, leading to a decrease in the machining accuracy of the splines. Furthermore, the reliability of the anti-roll torsion bar system cannot be guaranteed by connecting the torsion bar shaft and torsion bar arm with low-precision splines. Summary of the Invention

[0004] In view of the above-mentioned problems in the prior art, the present invention provides an auxiliary device for machining splines, which can assist in machining splines on slender rods such as torsion bar shafts, thereby improving the machining accuracy of splines.

[0005] The technical solution adopted by this invention to solve its technical problem is: to provide an auxiliary device for processing splines, comprising, Mounting cylinder; A first connecting component is disposed at one end of the mounting cylinder, the first connecting component being configured to connect the mounting cylinder to the chuck of a machine tool; and A second connecting assembly is disposed at the other end of the mounting cylinder. This second connecting assembly is configured to secure the torsion bar shaft inserted into the mounting cylinder, thereby reducing the effective length of the torsion bar shaft. The mounting sleeve is configured to buffer the vibration generated when the torsion bar shaft is machined into splines on the machine tool.

[0006] Furthermore, the mounting cylinder is provided with a buffer groove extending in the circumferential direction, and a buffer element is provided in the buffer groove. The buffer element is configured to buffer the vibration generated by the torsion bar shaft during spline machining.

[0007] Furthermore, the buffer groove extends along a spiral path on the mounting cylinder.

[0008] Furthermore, a plurality of the first connecting components are evenly arranged in the mounting groove of the mounting cylinder along the circumferential direction at one end of the mounting cylinder, and each of the first connecting components is configured to abut against the jaws of the chuck in a radially outward direction so as to connect the mounting cylinder to the chuck.

[0009] Furthermore, each of the first connecting components includes a first adjusting bolt screwed to a mounting block in the mounting groove, a first slider disposed on the first adjusting bolt, and a first connecting block abutting against the first slider in the mounting groove. The first slider is configured to move away from the mounting block during the rotation of the first adjusting bolt, so that the first connecting block moves radially outward, thereby abutting the first connecting block against the claw.

[0010] Furthermore, a limiting part is provided on the first adjusting bolt, and the first slider is rotatably connected between the limiting part and the bolt head of the first adjusting bolt, so that the first slider can move toward or away from the mounting block during the rotation of the first adjusting bolt.

[0011] Furthermore, the first slider is provided with a first abutting surface that abuts against the first connecting block. The first abutting surface is configured to push the first connecting block to move radially outward as the first slider moves away from the mounting block.

[0012] Furthermore, a plurality of the second connecting components are evenly arranged in the mounting groove of the mounting cylinder along the circumferential direction at the other end of the mounting cylinder, and each of the second connecting components is configured to jointly clamp the torsion bar shaft inserted into the mounting cylinder in a radially inward direction.

[0013] Furthermore, the second connecting assembly includes a second adjusting bolt with the same structure as the first adjusting bolt, a second slider disposed on the second adjusting bolt, and a second connecting block disposed within the mounting groove. The second slider is configured to move away from the mounting block after the second connecting block abuts against the torsion bar shaft, so as to abut against the second connecting block and thus prevent the second connecting block from moving in the radial direction.

[0014] Furthermore, the second slider is provided with a second abutting surface, which is configured to abut against the second connecting block when the second slider moves away from the mounting block, so that the second slider can apply a circumferential holding force to the second connecting block, so that a second frictional force that is radially inward and always static frictional force can be generated between the second connecting block and the groove wall of the mounting groove.

[0015] The beneficial effects of this invention are as follows: This invention provides an auxiliary device for machining splines, comprising a mounting cylinder, a first connecting assembly disposed at one end of the mounting cylinder, and a second connecting assembly disposed at the other end of the mounting cylinder. The first connecting assembly is configured to connect the mounting cylinder to the chuck of a machine tool. The second connecting assembly is configured to fix a torsion bar shaft inserted into the mounting cylinder, thereby reducing the effective length of the torsion bar shaft. The mounting cylinder is configured to buffer the vibration generated by the torsion bar shaft during spline machining on the machine tool. The auxiliary device effectively reduces the deformation of the torsion bar shaft during machining and buffers the vibration generated by the torsion bar shaft during spline machining through the mounting cylinder. This effectively improves the machining accuracy when machining splines on the torsion bar shaft, resulting in a tighter fit between the torsion bar shaft and the torsion bar arm, more uniform stress distribution at the connection point, and thus improved reliability of the anti-roll torsion bar. In addition, the first connecting component of the auxiliary device can connect the mounting cylinder to the chuck of the machine tool through the first adjusting bolt, and the second connecting component can clamp the torsion bar shaft through the second adjusting bolt, which effectively improves the convenience of the auxiliary device during use, thereby improving the installation efficiency of the auxiliary device. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 The diagram shows a schematic of an auxiliary device for machining splines.

[0018] Figure 2 The image shown is a cross-sectional view of the auxiliary device used for machining splines from one perspective.

[0019] Figure 3 As shown Figure 2 A partially enlarged view of the auxiliary device used for machining splines.

[0020] Figure 4 The image shown is a cross-sectional view of the auxiliary device used for machining splines from another perspective.

[0021] Figure 5 As shown Figure 4 A partially enlarged view of the auxiliary device used for machining splines.

[0022] In the figure, the following reference numerals are used: 100, auxiliary device; 101, torsion bar shaft; 102, chuck; 10. Mounting cylinder; 11. Mounting groove; 111. Mounting block; 12. Buffer groove; 13. Buffer component; 20. First connecting assembly; 21. First adjusting bolt; 211. Bolt head; 212. Limiting part; 22. First slider; 221. Through hole; 222. First abutting surface; 23. First connecting block; 231. First supporting surface; 232. First end face; 233. Limiting surface; 30. Second connecting component; 31. Second adjusting bolt; 32. Second slider; 321. Second abutting surface; 33. Second connecting block; 331. Second supporting surface; 332. Second end face; 333. Connecting surface. Detailed Implementation

[0023] To make the technical problem to be solved, the technical solution, and the beneficial effects of this invention clearer, the invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic structure of the invention, and therefore only shows the components relevant to the invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] refer to Figure 1 As shown, the auxiliary device 100 for machining splines provided by the present invention includes a mounting sleeve 10 for connecting a chuck (not shown) to a machine tool and a torsion bar shaft 101, and a first connecting assembly 20 and a second connecting assembly 30 respectively disposed at both ends of the mounting sleeve 10. The first connecting assembly 20 connects the mounting sleeve 10 to the chuck of the machine tool, and the second connecting assembly 30 fixes the torsion bar shaft 101 inserted into the mounting sleeve 10. When machining splines on the torsion bar shaft 101 using the machine tool, the end of the torsion bar shaft 101 is partially inserted into the interior of the mounting sleeve 10 and fixed by the second connecting assembly 30. This reduces the effective length of the torsion bar shaft 101, lessens deformation of the torsion bar shaft 101 during machining, and thus improves the machining accuracy when machining splines on the torsion bar shaft 101. Furthermore, the mounting sleeve 10 is configured to reduce vibration of the torsion bar shaft 101 during axial cutting of the torsion bar shaft 101 by the machine tool, thereby further improving the machining accuracy of the splines on the torsion bar shaft 101. The spline produced in this way allows for a tighter fit between the torsion bar shaft 101 and the torsion bar arm (not shown in the figure), and a more uniform force distribution at the connection point, thereby improving the reliability of the anti-roll torsion bar.

[0025] refer to Figure 1-3 and Figure 4As shown, in some embodiments, a plurality of mounting grooves 11 are formed on the walls at both ends of the mounting cylinder 10 for mounting a plurality of first connecting components 20 and a plurality of second connecting components 30, respectively. Each mounting groove 11 is also provided with a mounting block 111 for connecting the first connecting component 20 or the second connecting component 30. A buffer groove 12 is formed on the wall at the center of the mounting cylinder 10 for mounting a buffer member 13. In some embodiments, during the process of the machine tool cutting the torsion bar shaft 101 axially to machine the spline, the buffer member 13 can reduce the vibration transmitted from the torsion bar shaft 101 to the mounting cylinder 10 through the second connecting components 30.

[0026] In some preferred embodiments, a plurality of first connecting components 20 and a plurality of second connecting components 30 are evenly arranged along the circumferential direction of the mounting cylinder 10, so that the chuck of the machine tool can stably clamp the mounting cylinder 10, and the mounting cylinder 10 can stably clamp the torsion bar shaft 101. In this embodiment, four of each of the first connecting components 20 and the second connecting components 30 are evenly arranged along the circumferential direction of the mounting cylinder 10.

[0027] In some embodiments, the buffer groove 12 extends circumferentially on the mounting cylinder 10 so that the buffer element 13 within the buffer groove 12 buffers vibrations in the axial direction. In some preferred embodiments, multiple buffer grooves 12 are spaced apart axially on the mounting groove 11 to improve the buffering performance of the mounting cylinder 10. This can further reduce the vibration of the torsion bar shaft 101 during spline machining, thereby further improving the machining accuracy of the splines on the torsion bar shaft 101.

[0028] In some embodiments, the buffer groove 12 extends along the axial direction of the mounting cylinder 10 in a helical pattern. This improves the ease of machining the buffer groove 12 on the mounting cylinder 10 and also ensures good continuity of the mounting cylinder 10 after the buffer groove 12 is created. This guarantees that the mounting cylinder 10 maintains good coaxiality after the buffer member 13 is installed in the buffer groove 12, thereby ensuring the machining accuracy of the spline on the torsion bar shaft 101.

[0029] In some embodiments, the buffer 13 may be made of a flexible material with a large damping coefficient, such as rubber or silicone, to buffer the axial vibration transmitted from the torsion bar shaft 101 to the mounting cylinder 10 via the second connecting assembly 30. In this embodiment, the buffer 13 is vulcanized rubber disposed within the buffer groove 12.

[0030] In some preferred embodiments, the damping of the buffer 13 can be adjusted by changing the vulcanization formula of the rubber buffer 13, thereby making the auxiliary device 100 suitable for various processing conditions. This allows for the selection of the appropriate auxiliary device 100 when processing torsion bar shafts 101 with different precision requirements, thus expanding the applicability of the auxiliary device 100.

[0031] refer to Figure 2 and Figure 3 As shown, in some embodiments, the first connecting assembly 20 disposed in the mounting slot 11 includes a first adjusting bolt 21 screwed to the mounting block 111, a first slider 22 rotatably connected to the first adjusting bolt 21, and a first connecting block 23 abutting against the first slider 22 within the mounting slot 11. The first slider 22 is configured to move away from the mounting block 111 during rotation of the first adjusting bolt 21, so that the first connecting block 23 moves radially outward, thereby enabling the first connecting block 23 to abut against the jaws 102 of the chuck. In this way, the mounting cylinder 10 can be connected to the chuck of the machine tool via the various first connecting assemblies 20.

[0032] In some embodiments, the first adjusting bolt 21 is provided with a limiting portion 212 for engaging with the bolt head 211 of the first adjusting bolt 21 to limit the movement of the first slider 22. This allows the first slider 22 to move closer to or further away from the mounting block 111 as the first adjusting bolt 21 rotates relative to the mounting block 111. Furthermore, the limiting portion 212 can also abut against the end face of the mounting block 111 to ensure the first adjusting bolt 21 is securely tightened. In this embodiment, an internal hexagonal hole is provided on the end face of the bolt head 211 to facilitate rotation of the first adjusting bolt 21 using an internal hexagonal wrench.

[0033] Combination Figure 3 As shown, in some embodiments, the first slider 22 has a through circular hole 221 to accommodate the portion between the bolt head 211 and the limiting part 212 of the first adjusting bolt 21, and to allow the first slider 22 and the first adjusting bolt 21 to rotate relative to each other. This allows the first slider 22 to move with the first adjusting bolt 21 during the tightening or loosening of the first adjusting bolt 21. The side of the first slider 22 facing the first connecting block 23 is a first abutting surface 222, which is inclined, so that the first abutting surface 222 can apply a radially outward and circumferentially resisting force to the first connecting block 23 when moving away from the mounting block 111.

[0034] refer to Figure 3As shown, in some embodiments, the first connecting block 23 is provided with a first abutting surface 231 that contacts the first abutting surface 222, a first end surface 232 that is away from the first abutting surface 231, and a limiting surface 233 that connects the first end surface 232 and the first abutting surface 231. The normal direction of the first abutting surface 231 is the same as the normal direction of the first abutting surface 222, so that the first abutting surface 222 can slide along the first abutting surface 231. After the first slider 22 applies a resisting force in the radially outward direction and the circumferential direction to the first connecting block 23, a first radially inward frictional force is generated between the first end surface 232 of the first connecting block 23 and the groove surface of the mounting groove 11. By reasonably setting the inclination angles of the first abutment surface 222 and the first support surface 231, the first frictional force can be made less than the radially outward supporting force exerted by the first slider 22 on the first connecting block 23, thereby enabling the first connecting block 23 to move radially outward when the first slider 22 moves away from the mounting block 111. The inclination angles of the first abutment surface 222 and the first support surface 231 can be calculated using classical mechanics based on the coefficient of friction between the first end face 232 and the groove surface of the mounting groove 11, and will not be elaborated further in this application.

[0035] In some embodiments, when the first slider 22 moves away from the mounting block 111 along with the first adjusting bolt 21, the first abutting surface 222 moves radially outward along the first supporting surface 231. During this process, the first slider 22 exerts a supporting force on the first connecting block 23 through the first abutting surface 222, causing the first connecting block 23 to move radially outward until the limiting surface 233 of the first connecting block 23 abuts against the jaws 102 of the chuck. At this time, the machine tool chuck abuts against the first connecting blocks 23 of each first connecting assembly 20 through the respective jaws 102, thereby achieving the connection of the mounting cylinder 10.

[0036] In other embodiments, as the first slider 22 moves toward the mounting block 111 along with the first adjusting bolt 21, the first abutment surface 222 moves radially inward along the first abutment surface 231. During this process, the abutment force exerted by the first slider 22 on the first connecting block 23 through the first abutment surface 222 continuously decreases, causing the abutment force between the limiting surface 233 of the first connecting block 23 and the jaw 102 of the chuck to also continuously decrease. When the abutment force between the limiting surface 233 and the jaw 102 is zero, the mounting cylinder 10 can be removed from the chuck of the machine tool.

[0037] refer to Figure 4 and Figure 5As shown, in some embodiments, the second connecting assembly 30 disposed in the mounting groove 11 includes a second adjusting bolt 31 screwed to the mounting block 111, a second slider 32 rotatably connected to the second adjusting bolt 31, and a second connecting block 33 abutting against the second slider 32 within the mounting groove 11. Each of the second connecting assemblies 30 is configured to collectively clamp the torsion bar shaft 101 inserted into the mounting cylinder 10 in a radially inward direction. The structure of the second adjusting bolt 31 is the same as that of the first adjusting bolt 21. The second slider 32 is configured to move away from the mounting block 111 after the second connecting block 33 abuts against the torsion bar shaft 101, and to apply a radially outward and circumferential holding force to the second connecting block 33.

[0038] In some embodiments, the second slider 32 also has a through circular hole 221 to accommodate the portion between the bolt head 211 and the limiting part 212 of the second adjusting bolt 31, and to allow the second slider 32 and the second adjusting bolt 31 to rotate relative to each other. This allows the second slider 32 to move with the second adjusting bolt 31 during the tightening or loosening of the second adjusting bolt 31. The second slider 32 is provided with a second abutting surface 321 that abuts against the second connecting block 33. The second abutting surface 321 is also an inclined surface, so that the second slider 32 can apply a supporting force to the second connecting block 33 in both the radially outward direction and the circumferential direction through the second abutting surface 321.

[0039] refer to Figure 5 As shown, in some embodiments, the second connecting block 33 is provided with a second abutting surface 331 that contacts the second abutting surface 321, a second end surface 332 opposite to the second abutting surface 331, and a connecting surface 333 adjacent to the second end surface 332 and used to abut against the surface of the torsion bar shaft 101. After the second slider 32 applies a holding force in the radially outward direction and the circumferential direction to the second connecting block 33, a second frictional force in the radially inward direction is generated between the second end surface 332 of the second connecting block 33 and the groove surface of the mounting groove 11. The second frictional force is always a static frictional force. By reasonably setting the inclination angle of the second abutting surface 321 and the second abutting surface 331, the second frictional force can be made much greater than the radially outward holding force applied by the second slider 32 and the torsion bar shaft 101 to the second connecting block 33, thereby preventing the second connecting block 33 from moving in the radial direction. In this way, the torsion bar shaft 101 inserted into the mounting cylinder 10 can be clamped together by the various second connecting components 30 in the radially inward direction. The inclination angles of the second contact surface 321 and the second bearing surface 331 can be determined by classical mechanics based on the coefficient of friction between the second end face 332 and the groove surface of the mounting groove 11, and will not be elaborated further in this application.

[0040] In some preferred embodiments, the curvature of the connecting surface 333 is the same as the surface curvature of the torsion bar shaft 101. This prevents damage to the surface of the torsion bar shaft 101 when the connecting surface 333 abuts against it.

[0041] In some embodiments, when the second slider 32 moves toward the mounting block 111 along with the second adjusting bolt 31, the second abutment surface 321 separates from the second abutment surface 331. At this time, the second slider 32 does not apply any force to the second connecting block 33. The connecting surface 333 of the second connecting block 33 can separate from the surface of the torsion bar shaft 101, thereby allowing the torsion bar shaft 101 to be removed from the mounting cylinder 10.

[0042] In other embodiments, after the connecting surface 333 of the second connecting block 33 abuts against the surface of the torsion bar shaft 101, when the second slider 32 moves away from the mounting block 111 along with the second adjusting bolt 31, the second abutting surface 321 abuts against the second supporting surface 331. During this process, the second slider 32 applies a supporting force to the first connecting block 23 in both the radially outward and circumferential directions through the first abutting surface 222, so that the second end face 332 of the second connecting block 33 can generate the second frictional force in the radially inward direction between the groove surface of the mounting groove 11. Since the second frictional force is greater than the radially outward supporting force applied to the second connecting block 33 by the second slider 32 and the torsion bar shaft 101, the second connecting block 33 cannot move in the radial direction. This achieves the locking of the torsion bar shaft 101.

[0043] Combination Figure 1-5 As shown, the auxiliary device 100 for machining splines provided by the present invention is used as follows: The mounting cylinder 10 is fixed to the chuck of the machine tool by cooperating with each of the first connecting components 20 and each of the jaws 102 of the chuck. Then, the torsion bar shaft 101 is inserted into the mounting cylinder 10 in the axial direction, so that the length remaining outside the mounting cylinder 10 meets the machining requirements. This reduces the effective length of the torsion bar shaft 101, alleviates deformation of the torsion bar shaft 101 during machining, and improves the stability of the torsion bar shaft 101 during machining, thereby improving the machining accuracy of the splines on the torsion bar shaft 101. After the second connecting component 30 locks the torsion bar shaft 101, it can be machined by the machine tool to cut splines onto the torsion bar shaft 101. During the cutting process, the buffer 13 provided on the mounting cylinder 10 can reduce the vibration of the torsion bar shaft 101 caused by the cutting tool, thereby further improving the machining accuracy of the splines on the torsion bar shaft 101.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0046] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An auxiliary device for machining splines, comprising: Mounting cylinder (10); A first connecting component (20) is disposed at one end of the mounting cylinder (10), the first connecting component (20) being configured to connect the mounting cylinder (10) to the chuck of a machine tool; and A second connecting assembly (30) is disposed at the other end of the mounting cylinder (10). The second connecting assembly (30) is configured to fix the torsion bar shaft (101) inserted into the mounting cylinder (10) so as to reduce the effective length of the torsion bar shaft (101). in, The mounting cylinder (10) is configured to buffer the vibration generated when the torsion bar shaft (101) is machined into splines on the machine tool. The mounting cylinder (10) is provided with a buffer groove (12) extending in the circumferential direction. A buffer element (13) is provided within the buffer groove (12). The buffer element (13) is configured to buffer the vibration generated when the torsion bar shaft (101) is machined into splines. A plurality of first connecting components (20) are evenly arranged in the mounting groove (11) of the mounting cylinder (10) in the circumferential direction at one end of the mounting cylinder (10). Each first connecting component (20) is configured to abut against the jaws (102) of the chuck in a radially outward direction, so as to connect the mounting cylinder (10) to the chuck. Each of the first connecting components (20) includes a first adjusting bolt (21) screwed to a mounting block (111) in the mounting groove (11), a first slider (22) disposed on the first adjusting bolt (21), and a first connecting block (23) abutting against the first slider (22) in the mounting groove (11). The first slider (22) is configured to move away from the mounting block (111) during rotation of the first adjusting bolt (21), so that the first connecting block (23) moves radially outward, thereby abutting against the claw (102). Several second connecting components (30) are evenly arranged in the mounting groove (11) of the mounting cylinder (10) along the circumferential direction at the other end of the mounting cylinder (10). Each of the second connecting components (30) is configured to clamp the torsion bar shaft (101) inserted into the mounting cylinder (10) together in a radially inward direction. The second connecting assembly (30) includes a second adjusting bolt (31) with the same structure as the first adjusting bolt (21), a second slider (32) disposed on the second adjusting bolt (31), and a second connecting block (33) disposed in the mounting groove (11). The second slider (32) is configured to move away from the mounting block (111) after the second connecting block (33) abuts against the torsion bar shaft (101) so as to abut against the second connecting block (33), thereby preventing the second connecting block (33) from moving in the radial direction. The second slider (32) is provided with a second abutting surface (321), which is configured to abut against the second connecting block (33) when the second slider (32) moves away from the mounting block (111), so that the second slider (32) can apply a holding force in the circumferential direction to the second connecting block (33), so that a second frictional force that is radially inward and always static friction can be generated between the second connecting block (33) and the groove wall of the mounting groove (11).

2. The auxiliary device for processing splines according to claim 1, characterized in that, The buffer groove (12) extends in a spiral direction on the mounting cylinder (10).

3. The auxiliary device for processing splines according to claim 1, characterized in that, The first adjusting bolt (21) is provided with a limiting part (212), and the first slider (22) is rotatably connected between the limiting part (212) and the bolt head (211) of the first adjusting bolt (21), so that the first slider (22) can move toward or away from the mounting block (111) during the rotation of the first adjusting bolt (21).

4. The auxiliary device for processing splines according to claim 1, characterized in that, The first slider (22) is provided with a first abutting surface (222) that abuts against the first connecting block (23). The first abutting surface (222) is configured to push the first connecting block (23) to move radially outward as the first slider (22) moves away from the mounting block (111).

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