Machining self-centering tool

Abstract

The utility model relates to the technical field of machining, in particular to a machining self-centering tool which comprises a supporting assembly and an adjusting assembly, the supporting assembly comprises a base, the base is in a circular ring shape, the base is installed on a chuck, a workpiece is arranged on the base in a sleeving mode, and the adjusting assembly is connected to the base. The adjusting assembly is used for adjusting the distance between the interior of a workpiece and the outer side of the base and used for abutting against the workpiece. The clamping device has the effect that workpieces of different sizes can be clamped and machined conveniently.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical processing, in particular to a mechanical processing self-centering tool. BACKGROUND

[0002] Carbon-carbon composite materials (C / C composite materials) are widely used in aerospace, energy, automobile and other key fields due to their excellent high-temperature performance and mechanical properties, showing significant application value. With the continuous improvement of industrial manufacturing level, the requirements for machining precision and efficiency are getting higher and higher. As one of the important tools to ensure product quality, the design and application of tooling are also getting more and more attention. In various machining situations, tooling is mainly used for positioning and clamping workpieces to ensure the stability and accuracy of workpieces during machining, thereby improving the qualification rate of products and the overall efficiency of production lines.

[0003] The existing mechanical processing self-centering tool mainly includes a tool with a single positioning structure, a threaded fastening type tool, and a tool using a stepped structure for clamping. The tool with a single positioning structure is usually fixed by directly contacting the workpiece with the pre-set positioning element; the threaded fastening type tool relies on the relative movement between the inner and outer threads to achieve the effect of gradual fastening; and the tool using the stepped structure sets different height stepped surfaces on the base and tightens them through the corresponding clamping mechanism.

[0004] For the related technologies in the above, although these commonly used mechanical processing self-centering tools can meet the processing requirements to a certain extent, they can only be optimized for a certain size or type of workpiece in most cases, so if different sizes or types of workpieces are alternately processed in actual application, it will face great adjustment difficulty. Specifically, these traditional tools often cannot quickly adapt to changing processing tasks, especially when quickly switching workpiece models, the adjustment process is tedious and time-consuming, which makes it inconvenient to process workpieces of different sizes, seriously affecting work efficiency and precision control. CONTENT OF THE INVENTION

[0005] In order to overcome the above problems, the present application provides a mechanical processing self-centering tool.

[0006] The mechanical processing self-centering tool provided by the present application adopts the following technical scheme:

[0007] A mechanical processing self-centering tool, comprising a supporting assembly and an adjusting assembly, the supporting assembly comprising a base, the base being circular, the base being installed on a chuck, a workpiece being sleeved on the base, the adjusting assembly being connected to the base, the adjusting assembly being used for adjusting the distance between the inside of the workpiece and the outside of the base, and the adjusting assembly being used for abutting against the workpiece.

[0008] By adopting the technical scheme, when a workpiece needs to be clamped, first, the base is moved to the chuck, and the base is corrected to a proper position, then the base and the chuck are fixed, subsequently, the workpiece is sleeved on the base, the adjusting assembly is started, the adjusting assembly abuts against the workpiece, and then the workpiece is clamped by the clamping device on the machining equipment. When workpieces of different sizes need to be machined, the adjusting assembly only needs to be adjusted. Compared with the related art, the machining self-centering tool can adapt to the machining requirements of workpieces of different sizes, simplifies the adjustment process during replacement of the workpiece, improves machining efficiency, the base is designed in a circular ring shape and is installed on the chuck, the workpiece is conveniently sleeved and fixed, the adjusting assembly can adjust the distance between the inside of the workpiece and the outside of the base and abut against the workpiece, rapid centering and clamping are achieved, and workpieces of different sizes are conveniently clamped and machined.

[0009] In one specific implementable scheme, the adjusting assembly comprises a fixing seat and a plurality of circular ring discs. The fixing seat is in a circular ring shape, is coaxially fixed to the top of the base, and is provided with a plurality of ring grooves in the outer wall thereof from the fixing seat to one side of the base. The diameters of the plurality of ring grooves gradually increase from the fixing seat to the base. The outer wall of the fixing seat is formed in a stepped shape. The circular ring discs are in one-to-one correspondence with the ring grooves and are coaxially located in the ring grooves. The inner wall of the circular ring disc is attached to the groove wall of the ring groove. The diameters of the plurality of circular ring discs gradually decrease from the fixing seat to the base. The workpiece is sleeved on the outside of the circular ring disc, and the circular ring disc is used to abut against the inside of the workpiece.

[0010] By adopting the technical scheme, first, the base and the chuck are fixed, then a circular ring disc suitable for the size of the workpiece is selected, the circular ring disc is installed on the fixing seat, the workpiece is sleeved on the outside of the circular ring disc, and the circular ring disc abuts against the workpiece. When a product model needs to be replaced, only the circular ring disc larger than the inner diameter of the product needs to be removed. This design achieves flexible replacement or combination of the circular ring disc according to workpieces of different sizes, improves the adaptability of the tool to workpieces of different types, simplifies the adjustment process during replacement of the workpiece, and improves machining efficiency.

[0011] In one specific implementable scheme, a fixing assembly is further included. The fixing assembly is connected with the circular ring disc and the fixing seat, and is used to fix the circular ring disc and the fixing seat.

[0012] By adopting the technical scheme, the fixing assembly is connected with the circular ring disc and the fixing seat, and the circular ring disc and the fixing seat are fixed, so as to prevent the circular ring disc from sliding and moving with the workpiece when the workpiece is removed, thereby improving the stability and accuracy of the workpiece during machining.

[0013] In one specific implementation, the fixing assembly includes a bolt, the annular disc has a through hole, when a plurality of the annular discs are placed in sequence on the fixing seat step, the through holes of the plurality of the annular discs are communicated with each other, the fixing seat has a fixing hole corresponding to the through hole, and the bolt is sequentially arranged in the through hole and the fixing hole to fix the plurality of the annular discs and the fixing seat.

[0014] By using the above technical solution, the bolt sequentially passes through the through hole and the fixing hole to reliably fix the annular disc and the fixing seat, prevent the annular disc from sliding during use, ensure the stability during workpiece machining, and facilitate quick replacement or adjustment of the annular disc according to workpieces of different sizes.

[0015] In one specific implementation, the adjusting assembly further includes an adjusting member, the adjusting member includes four abutting units and a driving unit, the four abutting units are located in the base, and the four abutting units are distributed along the circumference of the base. The abutting unit includes an abutting rod and a circular arc plate. The arrangement direction of the abutting rod is consistent with the diameter direction of the base. The abutting rod is arranged in the base and extends to the outside of the base. The abutting rod is slidingly connected to the base and slides along the length direction of the abutting rod. The circular arc plate is fixed to the end of the abutting rod located outside the base. The opening of the circular arc plate faces the base. The circular arc plate is used to abut the inside of the workpiece.

[0016] The driving unit is connected to the base and connected to the abutting rod to drive the abutting rod to move.

[0017] By using the above technical solution, when the workpiece needs to be clamped, the base and the chuck are first fixed, then the workpiece is sleeved on the base, the driving unit is started, the driving unit drives the abutting rod to move, the abutting rod drives the circular arc plate to move, and the circular arc plate abuts the inside of the workpiece. By matching the abutting unit and the driving unit, the inside of the workpiece of different sizes is quickly and accurately fixed, and the machining precision and production efficiency of the workpiece are improved.

[0018] In one specific implementation, the adjusting member further includes four clamping units, the clamping units correspond to the abutting units one by one, the clamping unit includes a screw rod, a connecting plate, and a pinion gear. The screw rod is arranged in parallel with the abutting rod. One end of the screw rod is rotationally connected to the base. One end of the connecting plate is fixed to the base, and the other end is rotationally connected to the screw rod away from the base. The screw rod away from the base is coaxially fixed with the pinion gear. One end of the abutting rod located in the base is threadedly connected to the screw rod.

[0019] The driving unit comprises a driving plate, a main bevel gear and a driving handle, the driving plate is fixed in the base, the driving plate is located on the side of the screw rod close to the top of the base, the main bevel gear is located on the side of the driving plate close to the slave bevel gears, the main bevel gear is meshed with the four slave bevel gears at the same time, the driving handle is coaxially fixed with the main bevel gear by being arranged through the driving plate, and the driving handle is rotationally connected to the driving plate.

[0020] By adopting the above technical scheme, the clamping unit and the abutting unit are one-to-one corresponding arrangement, so that each abutting rod can be independently adjusted. Through the rotation of the screw rod, the abutting rod is driven to slide along the length direction, and then the circular arc plate is pushed to abut against the inside of the workpiece, so that the precise positioning and clamping of the workpiece are realized. When the driving handle of the driving unit rotates, the main bevel gear is driven to rotate, the main bevel gear is meshed with the slave bevel gears, and the four screw rods are further driven to rotate synchronously, so that the four circular arc plates are uniformly abutted against the workpiece, and the stability and reliability of the workpiece fixing are improved.

[0021] In one specific implementation scheme, the adjusting member further comprises four elastic ropes, a connecting gap is left between adjacent two circular arc plates, and four elastic ropes are respectively located in one connecting gap, and the two ends of each elastic rope are fixed to one circular arc plate.

[0022] By adopting the above technical scheme, the adjacent two circular arc plates are connected through the elastic ropes, the stability of the circular arc plate when abutting against the workpiece is improved, the deviation of the circular arc plate in the movement process is avoided, so that the stability of the workpiece in the machining process is ensured, and the machining precision is further improved.

[0023] In one specific implementation scheme, the abutting unit further comprises a flexible pad, and the flexible pad is fixed to the side of the circular arc plate away from the abutting rod.

[0024] By adopting the above technical scheme, the added flexible pad can effectively reduce the damage of the circular arc plate to the workpiece when abutting against the inside of the workpiece, improve the workpiece machining quality, and prolong the service life of the workpiece. The setting of the flexible pad makes the workpiece more uniform under stress, and reduces the risk of deformation or damage caused by hard contact.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. The designed machining self-centering tool can adapt to the machining requirements of workpieces of multiple sizes, simplify the adjustment process during workpiece replacement, improve the machining efficiency, the base is designed in a circular ring shape and installed on a chuck, the workpiece is convenient to set and fix, the adjusting assembly can adjust the distance between the inside of the workpiece and the outside of the base and abut against the workpiece, realize rapid centering and clamping, and facilitate clamping and machining of workpieces of different sizes.

[0027] 2. The designed mechanical machining self-centering tool realizes flexible replacement or combination of the circular ring disc according to workpieces of different sizes, improves the adaptability of the tool to different types of workpieces, simplifies the adjustment process when replacing the workpiece, and improves the machining efficiency.

[0028] 3. The designed mechanical machining self-centering tool realizes quick and accurate fixation of the inside of workpieces of different sizes through the cooperation of the abutting unit and the driving unit, improving the machining precision and production efficiency of the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of embodiment 1.

[0030] Figure 2 is a sectional view of the base in embodiment 1.

[0031] Figure 3 is an enlarged view of A in Figure 2

[0032] Figure 4 is a schematic diagram of the overall structure of embodiment 2.

[0033] BRIEF DESCRIPTION OF DRAWINGS: 1, support assembly; 11, base; 12, support piece; 121, support rod; 2, adjustment assembly; 21, fixed seat; 211, ring groove; 212, fixed hole; 22, circular ring disc; 221, through hole; 23, adjustment piece; 231, clamping unit; 2311, screw rod; 2312, connecting plate; 2313, bevel gear; 232, abutting unit; 2321, abutting rod; 2322, sliding seat; 2323, circular arc plate; 2324, flexible pad; 233, elastic rope; 234, driving unit; 2341, driving plate; 2342, main bevel gear; 2343, driving handle; 3, fixing assembly; 31, bolt. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying Figures 1-4 The present application is further described in detail.

[0035] The embodiments of the present application disclose a mechanical machining self-centering tool.

[0036] Embodiment 1

[0037] Referring to Figure 1 , Figure 2 and Figure 3 , a mechanical machining self-centering tool includes a support assembly 1, an adjustment assembly 2 and a fixing assembly 3, the adjustment assembly 2 is arranged on the support assembly 1, and the fixing assembly 3 is arranged on the adjustment assembly 2.

[0038] Referring to​Figure 1 The support assembly 1 comprises a base 11 and a support 12. In this embodiment, the base 11 is in the shape of a circular ring, facilitating the fitting of the workpiece on the base 11. The support 12 comprises two support rods 121, which are located on the side walls of the base 11 and are evenly distributed in the circumferential direction of the base 11. The support rods 121 can be fixedly connected to the base 11 by screws or welding. In this embodiment, the support rods 121 are welded to the base 11. Both support rods 121 are close to the bottom of the base 11, and the bottoms of the support rods 121 are flush with the bottom of the base 11, facilitating the correction of the base 11 and the subsequent fixation of the base 11 on the chuck by a pin, improving the stability of the fixed base 11, and avoiding the repeated correction of the product.

[0039] Referring to Figure 1 , Figure 2 and Figure 3 , the adjusting assembly 2 comprises a fixed seat 21 and a plurality of circular ring plates 22. The fixed seat 21 is located on the top of the base 11. In this embodiment, the fixed seat 21 is in the shape of a circular ring and is coaxially arranged with the base 11. The fixed seat 21 is integrally arranged with the base 11. A plurality of annular grooves 211 are formed on the outer side wall of the fixed seat 21, and the plurality of annular grooves 211 are distributed from the fixed seat 21 to one side of the base 11. The diameters of the plurality of annular grooves 211 gradually increase from the fixed seat 21 to the base 11, so that the outer wall of the fixed seat 21 is in the shape of a step. The circular ring plates 22 correspond to the annular grooves 211 one by one. The circular ring plates 22 are located in the annular grooves 211 and are coaxially arranged with the annular grooves 211. The inner wall of the circular ring plate 22 is attached to the groove wall of the annular groove 211. The diameters of the plurality of circular ring plates 22 gradually decrease from the fixed seat 21 to the base 11, facilitating the adaptation to the processing requirements of products of different sizes. When it is necessary to replace the product model, only the circular ring plate 22 larger than the inner diameter of the product needs to be removed.

[0040] Referring to Figure 2 and Figure 3 , the fixing assembly 3 comprises a bolt 31. Through holes 221 are formed on the circular ring plates 22. When the plurality of circular ring plates 22 are clamped in the steps of the fixed seat 21 in sequence, the through holes 221 on the plurality of circular ring plates 22 are in communication with each other. The fixed seat 21 is provided with fixing holes 212 corresponding to the through holes 221. The bolt 31 is sequentially arranged in the through holes 221 and the fixing holes 212. The bolt 31 can fix the plurality of circular ring plates 22 and the fixed seat 21, preventing the sliding of the circular ring plates 22 and avoiding the movement of the circular ring plates 22 with the workpiece when the workpiece is removed.

[0041] The implementation principle of the embodiment 1 is that when the workpiece needs to be clamped, first, the support assembly 1 is taken out, the base 11 is moved to the chuck, the base 11 is corrected to the appropriate position, the support rod 121 is fixed with the chuck, after the base 11 is installed, the appropriate annular disc 22 is selected according to the size of the workpiece to be clamped, the annular disc 22 is fixed with the fixing seat 21, the annular disc 22 and the fixing seat 21 are fixed through the fixing assembly 3, then the workpiece is fixed with the annular disc 22, and the workpiece is clamped through the clamping device on the machining equipment.

[0042] When the workpieces of different sizes need to be clamped, the annular disc 22 can be installed or disassembled according to the size of the workpiece.

[0043] Embodiment 2

[0044] With reference to Figure 4The embodiment is different from embodiment 1 in that the adjusting assembly 2 further comprises an adjusting part 23, the adjusting part 23 comprises four clamping units 231, four abutting units 232, four elastic ropes 233 and a driving unit 234, the four clamping units 231 are located in the base 11, the four clamping units 231 are uniformly distributed along the circumference of the base 11, the clamping unit 231 comprises a screw rod 2311, a connecting plate 2312 and a bevel gear 2313, the setting direction of the screw rod 2311 is consistent with the diameter direction of the base 11, one end of the screw rod 2311 is rotationally connected to the base 11, one end of the connecting plate 2312 is welded to the base 11, the other end is rotationally connected to the screw rod 2311 away from the base 11, the other end of the screw rod 2311 away from the base 11 is coaxially welded to the bevel gear 2313, the abutting unit 232 corresponds to the screw rod 2311 in one-to-one manner, the abutting unit 232 comprises an abutting rod 2321, a sliding seat 2322, a circular arc plate 2323 and a flexible pad 2324, the abutting rod 2321 is arranged in parallel with the screw rod 2311, the abutting rod 2321 is welded to the sliding seat 2322 at one end close to the bevel gear 2313, the sliding seat 2322 is threadedly connected to the screw rod 2311, and the sliding seat 2322 can reciprocally slide along the length direction of the screw rod 2311, the abutting rod 2321 penetrates through the base 11 at the other end away from the sliding seat 2322 and extends to the outside of the base 11, the abutting rod 2321 is slidingly connected to the base 11, the sliding direction of the abutting rod 2321 is consistent with the length direction of the screw rod 2311, the circular arc plate 2323 is located at the other end of the abutting rod 2321 away from the sliding seat 2322, the opening of the circular arc plate 2323 faces the side of the base 11, the circular arc plate 2323 is welded to the abutting rod 2321, the circular arc plate 2323 moves synchronously with the abutting rod 2321, the four circular arc plates 2323 can abut against the inside of the workpiece, the flexible pad 2324 is fixedly bonded to the circular arc plate 2323 at the side away from the abutting rod 2321, when the circular arc plate 2323 abuts against the inside of the workpiece, the flexible pad 2324 contacts the workpiece, and the damage of the workpiece is reduced.

[0045] With reference to Figure 4 The connecting gap is left between the two adjacent circular arc plates 2323, the four elastic ropes 233 are located in the connecting gap respectively, and the two ends of the elastic rope 233 are fixedly connected to one circular arc plate 2323 through the screw respectively, when the abutting rod 2321 drives the circular arc plate 2323 to move, the elastic rope 233 is elongated or contracted along with the movement of the circular arc plate 2323, and the stability of the abutting of the circular arc plate 2323 is facilitated.

[0046] With reference to Figure 4The driving unit 234 comprises a driving plate 2341, a main bevel gear 2342 and a driving handle 2343. The driving plate 2341 is located in the base 11 and is fixedly connected with the inner wall of the base 11 by screws. The driving plate 2341 is located at the side of the screw rod 2311 close to the top of the base 11. The main bevel gear 2342 is located at the side of the driving plate 2341 close to the slave bevel gear 2313, and is engaged with the four slave bevel gears 2313 at the same time. The driving handle 2343 is coaxially welded with the main bevel gear 2343 after being arranged in the driving plate 2341. The driving handle 2343 is rotationally connected with the driving plate 2341. The driving handle 2343 drives the main bevel gear 2342 to rotate.

[0047] The implementation principle of the embodiment 2 is as follows: when the workpiece needs to be clamped, first, the support assembly 1 is taken out, the base 11 is moved to the chuck, and the base 11 is corrected to the appropriate position. Then, the support rod 121 is fixed with the chuck. After the base 11 is installed, the workpiece to be processed is sleeved outside the base 11. According to the size of the workpiece, the driving handle 2343 is screwed, the driving handle 2343 drives the main bevel gear 2342 to rotate. In the process of rotating the main bevel gear 2342, the four slave bevel gears 2313 can be rotated, so that the four screw rods 2311 are rotated. At this time, the abutting rod 2321 corresponding to the screw rod 2311 can push the circular arc plate 2323 to move, until the four circular arc plates 2323 can abut against the inside of the workpiece, and the workpiece is fixed.

[0048] When the workpiece of different sizes needs to be clamped, the personnel only need to screw the driving handle 2343, which can drive the circular arc plate 2323 to move. According to the size of the workpiece, the position of the circular arc plate 2323 is adjusted, so that the circular arc plate 2323 abuts against the workpiece.

[0049] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A mechanical machining self-centering tool characterized by: The utility model provides a workpiece support device, including support component (1) and adjusting component (2), support component (1) includes base (11), base (11) is circular, base (11) is installed to chuck, workpiece is sleeved in base (11), adjusting component (2) is connected to base (11), adjusting component (2) is used for adjusting the interval between workpiece inside and base (11) outside, adjusting component (2) is used for abutting tightly workpiece.

2. A mechanical machining self-centering tool according to claim 1, characterized in that: Adjusting component (2) includes fixed seat (21) and a plurality of circular ring disc (22), fixed seat (21) is circular, fixed seat (21) is coaxially fixed on the top of base (11), a plurality of ring grooves (211) are formed to the outside wall of fixed seat (21) along fixed seat (21) to one side of base (11), the diameter of a plurality of ring grooves (211) increases gradually from fixed seat (21) to base (11), the outside wall of fixed seat (21) forms step, circular ring disc (22) corresponds to ring groove (211) one to one, circular ring disc (22) is coaxially located in ring groove (211), the inner wall of circular ring disc (22) is attached to the groove wall of ring groove (211), the diameter of a plurality of circular ring disc (22) decreases gradually from fixed seat (21) to base (11), workpiece is sleeved in the outside of circular ring disc (22), circular ring disc (22) is used for abutting tightly workpiece inside.

3. A mechanical machining self-centering tool according to claim 2, characterized in that: It further includes a fixing assembly (3) connected with the circular ring disc (22) and the fixed seat (21), and the fixing assembly (3) is used for fixing the circular ring disc (22) and the fixed seat (21).

4. A mechanical machining self-centering tool according to claim 3, characterized in that: The fixing assembly (3) includes a bolt (31), the circular ring disc (22) is provided with a through hole (221), when a plurality of circular ring discs (22) are placed in the fixed seat (21) step by step, the through holes (221) on the plurality of circular ring discs (22) are communicated with each other, the fixed seat (21) is provided with a fixing hole (212) corresponding to the through hole (221), the bolt (31) is sequentially arranged in the through hole (221) and the fixing hole (212), and the bolt (31) fixes the plurality of circular ring discs (22) and the fixed seat (21).

5. A mechanical machining self-centering tool according to claim 1, characterized in that: The adjusting assembly (2) further comprises an adjusting part (23), the adjusting part (23) comprises four abutting units (232) and a driving unit (234), the four abutting units (232) are located in the base (11), and the four abutting units (232) are circumferentially distributed along the base (11); the abutting unit (232) comprises an abutting rod (2321) and a circular arc plate (2323), the setting direction of the abutting rod (2321) is consistent with the diameter direction of the base (11), the abutting rod (2321) is arranged on the base (11) and protrudes to the outside of the base (11), the abutting rod (2321) is slidably connected to the base (11) and slides along the length direction of the abutting rod (2321), and the circular arc plate (2323) is fixed to one end of the abutting rod (2321) located outside the base (11); the opening of the circular arc plate (2323) faces the base (11), and the circular arc plate (2323) is used for abutting against the inside of a workpiece. The driving unit (234) is connected to the base (11), and the driving unit (234) is connected to the abutting rod (2321) to drive the abutting rod (2321) to move.

6. A mechanical machining self-centering tool according to claim 5, characterized in that: The adjusting part (23) further comprises four clamping units (231), the clamping units (231) correspond to the abutting units (232) in a one-to-one manner, the clamping unit (231) comprises a screw rod (2311), a connecting plate (2312) and a pinion (2313), the screw rod (2311) is arranged in parallel with the abutting rod (2321), one end of the screw rod (2311) is rotatably connected to the base (11), one end of the connecting plate (2312) is fixed to the base (11), the other end of the connecting plate (2312) is rotatably connected to the end of the screw rod (2311) away from the base (11), the end of the screw rod (2311) away from the base (11) is coaxially fixed with the pinion (2313), and one end of the abutting rod (2321) located in the base (11) is threadedly connected to the screw rod (2311). The driving unit (234) comprises a driving plate (2341), a main bevel gear (2342) and a driving handle (2343), the driving plate (2341) is fixed in the base (11), the driving plate (2341) is located on the side of the screw rod (2311) close to the top of the base (11), the main bevel gear (2342) is located on the side of the driving plate (2341) close to the pinion (2313), the main bevel gear (2342) is meshed with the four pinions (2313) at the same time, the driving handle (2343) is arranged on the driving plate (2341) and coaxially fixed with the main bevel gear (2342), and the driving handle (2343) is rotatably connected to the driving plate (2341).

7. A mechanical machining self-centering tool according to claim 5, characterized in that: The adjusting piece (23) further comprises four elastic ropes (233), two adjacent circular arc plates (2323) are provided with a connecting gap, and the four elastic ropes (233) are located in the connecting gaps respectively, and two ends of the elastic rope (233) are fixed to the circular arc plates (2323) respectively.

8. A mechanical machining self-centering tool according to claim 5, characterized in that: The abutting unit (232) further comprises a flexible pad (2324), and the flexible pad (2324) is fixed to the side, away from the abutting rod (2321), of the circular arc plate (2323).

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