Special-shaped part turning and clamping tool

Abstract

The utility model relates to a special-shaped part turning and clamping tool which comprises an inserting bottom column detachably inserted on a mounting seat of a turning machine tool, and a center adjusting table which can position a turning rotating center line of a workpiece in a reconfigurable mode is connected to the end face of the inserting bottom column. A limiting shell is arranged on the movement plane, away from the inserting bottom column, of the aligning table, a plurality of translation assemblies are embedded in the end face, away from the aligning table, of the limiting shell in a rotational symmetry mode, and the translation assemblies are further in transmission connection with equivalent driving assemblies installed in the limiting shell; a clamping head capable of correcting the clamping position difference in advance so as to conduct annular multi-point equivalent clamping limiting on the special-shaped part is further arranged at the translation end of the translation assembly. According to the special-shaped part clamping device, aviation special-shaped parts of various specifications can be stably clamped in a reconfigurable mode, meanwhile, turning can be carried out according to requirements, a rotating center line can be adjusted and positioned, and the special-shaped part clamping application range is widened.

Description

Technical Field

[0001] This utility model relates to the field of turning fixture technology, and in particular to a turning fixture for irregularly shaped parts. Background Technology

[0002] Turning, also known as lathe machining, is a common machining method in the machinery manufacturing industry. Lathe machining primarily involves using a cutting tool to turn rotating workpieces. Lathes are mainly used for machining shafts, discs, sleeves, and other rotating or non-rotating workpieces with rotating surfaces. They are the most widely used type of machine tool in machinery manufacturing and repair shops. Existing lathe turning fixtures commonly use three-jaw chucks, generally for cylindrical parts. The aerospace manufacturing industry is a crucial component of high-end equipment manufacturing, and its products (such as aircraft and engines) have extremely high requirements for the precision, strength, and reliability of components. When machining product components, it is necessary to turn some aerospace-grade irregularly shaped parts with complex geometries and high-performance material properties to create rotating surfaces.

[0003] Due to the high geometric complexity of aerospace irregular-shaped parts, traditional lathe chucks and fixtures are ineffective in clamping and limiting them, and their rotation centers cannot be adjusted according to requirements. This prevents lathes from machining surfaces around different rotational axes as needed. In particular, existing fixtures for irregular-shaped parts typically use dedicated clamping and limiting methods, which cannot be adapted to the adjustable clamping of various different irregular-shaped parts. This reduces the applicability of the fixtures, increases production costs, and decreases efficiency in machining large batches of multi-specification aerospace irregular-shaped parts, failing to meet the demands of modern aerospace manufacturing. Utility Model Content

[0004] The purpose of this utility model is to provide a reconfigurable fixture for stably clamping various specifications of aerospace irregular parts, while also allowing for adjustable positioning of the turning rotation center line according to requirements. This improves the applicability of clamping irregular parts and ensures the clamping stability of different irregular parts. This solves the problems of existing irregular part fixtures being unable to adaptably clamp and limit various irregular parts of different specifications and shapes, requiring the design and production of one-to-one corresponding fixtures, resulting in high production costs, and existing irregular part fixtures being unable to adjust the turning rotation center line of the clamped irregular parts according to requirements, and unable to adaptably perform machining of rotating surfaces around axes at different positions.

[0005] The technical solution adopted by this utility model is as follows: a fixture for turning irregular parts, including a base column detachably inserted into the mounting base of a turning machine tool, a self-aligning table that can reconfigure and position the turning rotation center line of the workpiece connected to the end face of the base column, and a limiting shell placed on the moving plane of the self-aligning table away from the base column, and multiple translation components embedded in the end face of the limiting shell away from the self-aligning table in a rotationally symmetrical manner, and the translation components are also connected to an equivalent drive component installed in the limiting shell, and a clamping head is provided on the translation end of the translation component, which can pre-correct the clamping position difference and perform circumferential multi-point equivalent clamping and limiting of the irregular part.

[0006] According to a preferred embodiment, the clamping head includes a connecting seat, a guiding connecting mechanism, a limiting connecting mechanism, a clamping seat, and an abutting mechanism. The connecting seat is mounted on the mounting plate of the translation assembly, and the guiding connecting mechanism and the limiting connecting mechanism are movably passed through the connecting seat and are parallel to each other. The end face of the clamping seat near the connecting seat is connected to both the guiding connecting mechanism and the limiting connecting mechanism, and the abutting mechanism is also provided at the end of the clamping seat away from the connecting seat.

[0007] According to a preferred embodiment, the guide slide of the guide connection mechanism is slidably inserted on the connecting seat, an end block is provided at the end of the guide slide away from the clamping seat, and a limiting spring is sleeved on the rod body of the guide slide near the end block.

[0008] According to a preferred embodiment, the limiting connection mechanism includes a sliding insert plate that slides through the connecting seat and a limiting screw that is inserted into the top surface of the connecting seat to adjustably limit the relative position between the sliding insert plate and the connecting seat.

[0009] According to a preferred embodiment, the side of the clamping seat has two lateral flared corner grooves with a height difference for mounting the abutment mechanism.

[0010] According to a preferred embodiment, the deflection connecting plate of the abutment mechanism is rotatably inserted into the lateral flared corner groove via an insert shaft. One end of the deflection connecting plate extending out of the lateral flared corner groove is provided with an obtuse-angled strip, and the two ends of the obtuse-angled strip are rotatably provided with abutment wheels. A limiting torsion spring is provided on the insert shaft to limit the initial posture of the deflection connecting plate in the lateral flared corner groove.

[0011] According to a preferred embodiment, the translation component includes a through guide groove, a guide rod, a guide slider, a mounting plate, and a column head. The four through guide grooves are mounted on the limiting shell in a rotationally symmetrical manner. The guide rod, parallel to its slotting direction, passes through the through guide groove, and the guide slider, capable of sliding along its axis, is sleeved on the guide rod. The mounting plate and the column head are respectively provided on the top and bottom surfaces of the guide slider.

[0012] According to a preferred embodiment, the equivalent drive assembly includes a deflection drive motor, a cross-shaped equivalent rotating arm, and a sliding link. The deflection drive motor is mounted on the inner bottom surface of the limiting shell, and the cross-shaped equivalent rotating arm is sleeved on the rotating shaft of the deflection drive motor. The sliding link is rotatably connected to the four ends of the cross-shaped equivalent rotating arm, and the end of the sliding link away from the cross-shaped equivalent rotating arm is rotatably sleeved on the column head.

[0013] According to a preferred embodiment, the self-aligning table includes a lower platform, a middle platform, an upper platform, a high-precision translation mechanism, and guide rails. The lower platform is mounted on the end face of the insert base column and is connected to the middle platform via the horizontally arranged and parallel high-precision translation mechanism and guide rails on its other side. The side of the middle platform away from the lower platform is connected to the upper platform via the vertically arranged and parallel high-precision translation mechanism and guide rails.

[0014] The beneficial effects of this utility model are:

[0015] The self-aligning table provided in this application can adjust the rotation center of the clamped irregular-shaped part according to requirements, thereby facilitating the machining of rotating surfaces with different characteristics as needed. The translation component and equivalent drive component provided in this application can cooperate to provide equivalent clamping displacement drive and clamping force supply to multiple circumferentially arranged clamping heads, ensuring that multiple clamping heads moving in different directions can equivalently abut against different surfaces of the irregular-shaped part, thus guaranteeing clamping stability and shape protection. The clamping heads provided in this application can reconfigure their shape and size to adapt to various irregular-shaped parts of different specifications, achieving adaptive clamping of different irregular-shaped parts. This effectively increases the clamping applicability and clamping stability, reduces the cost of manufacturing a single fixture, and reduces the additional time wasted in fixture manufacturing, thereby improving the overall efficiency of batch turning machining. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a preferred fixture for turning irregularly shaped parts proposed in this utility model;

[0017] Figure 2This is a bottom view of a preferred translation component of a turning and clamping fixture for irregularly shaped parts proposed in this utility model.

[0018] Figure 3 This is a top plan view of the clamping head of a preferred fixture for turning irregularly shaped parts proposed in this utility model.

[0019] List of reference numerals

[0020] 1: Insert-mounted base column; 2: Self-aligning platform; 3: Limiting shell; 4: Translation assembly; 5: Equivalent drive assembly; 6: Clamping head; 21: Lower platform plate; 22: Middle platform plate; 23: Upper platform plate; 24: High-precision translation mechanism; 25: Guide rail; 241: Guide groove; 242: Drive screw; 243: Translation block; 244: Translation drive unit; 41: Through guide groove; 42: Guide rod; 43: Guide slider; 44: Mounting plate; 45: Column head; 51: Deflection drive motor 52: Cross-shaped equivalent rotating lever arm; 53: Sliding connecting rod; 61: Connecting seat; 62: Guide connecting mechanism; 63: Limiting connecting mechanism; 64: Clamping seat; 65: Abutting mechanism; 621: Guide slide rod; 622: End block; 623: Limiting spring; 631: Sliding insert plate; 632: Limiting screw; 641: Lateral flared angle groove; 651: Deflection connecting plate; 652: Insertion shaft; 653: Obtuse angle strip; 654: Abutting wheel; 655: Limiting torsion spring. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail.

[0023] The following is a detailed explanation with reference to the accompanying drawings. Example

[0024] This application provides a fixture for turning irregular parts, which includes an insert base 1, a self-aligning table 2, a limiting shell 2, a translation assembly 3, an equivalent drive assembly 4, and a clamping head 5.

[0025] according to Figure 1-3In one specific embodiment, the insert base 1 is detachably inserted into a mounting base such as a chuck on a turning machine tool. A self-aligning table 2 is connected to the end face of the insert base 1, allowing for reconfigurable positioning of the workpiece's turning rotation center line by changing the position of the workpiece's alignment with the extended axis of the insert base 1. A limiting shell 3 is positioned on the moving plane of the self-aligning table 2 away from the insert base 1. Multiple translation components 4 are mounted in a rotationally symmetrical manner on the end face of the limiting shell 3 away from the self-aligning table 2. The translation components 4 are also connected to an equivalent drive component 5 installed within the limiting shell 3. A clamping head 6 is also provided on the translation end of the translation component 4, capable of pre-correcting clamping position differences and providing circumferential multi-point equivalent clamping and limiting for irregularly shaped parts. The multiple circumferentially arranged clamping heads 6 can cooperate to adapt and clamp various aerospace irregularly shaped parts of different specifications and shapes. The self-aligning table 2 provided in this application can adjust the rotation center of the clamped irregular part according to requirements, thereby facilitating the machining of the irregular part's rotating surfaces with different requirements. The translation component 4 and equivalent drive component 5 provided in this application can cooperate to provide equivalent clamping displacement drive and clamping force supply for multiple circumferentially arranged clamping heads 6, ensuring that multiple clamping heads 6 moving in different directions can equivalently abut against different surfaces of the irregular part, thus ensuring clamping stability and shape protection. The clamping head 6 provided in this application can reconfigure its shape and size to adapt to various irregular parts of different specifications, achieving adaptive clamping of different irregular parts, effectively increasing the clamping applicability and clamping stability, reducing the cost of manufacturing a single fixture and reducing the extra time wasted in fixture manufacturing, and improving the overall efficiency of batch turning machining.

[0026] Preferably, the self-aligning table 2 includes a lower table plate 21, a middle table plate 22, an upper table plate 23, a high-precision translation mechanism 24, and guide rails 25. Preferably, the lower table plate 21 is mounted on the end face of the insert base column 1, and is connected to the middle table plate 22 on its other side via the horizontally arranged and parallel high-precision translation mechanism 24 and guide rails 25, thereby achieving controllable horizontal translation. Preferably, the side of the middle table plate 22 away from the lower table plate 21 is connected to the upper table plate 23 via the longitudinally arranged and parallel high-precision translation mechanism 24 and guide rails 25, thereby driving the upper table plate 23 to undergo controllable longitudinal translation. The high-precision translation mechanism 24 and guide rail 25 provided in this application can provide support and drive different plates to translate laterally and longitudinally as needed, thereby achieving adjustable positioning within a plane range. This allows the point where the extended axis of the insert base column 1 coincides with the upper plate 23 to be adjusted as needed, thereby positioning different rotation center line positions and adjusting the turning rotation center line.

[0027] Preferably, the high-precision translation mechanism 24 includes a guide groove 241, a drive screw 242, a translation block 243, and a translation drive unit 244. Preferably, the drive screw 242 is rotatably disposed in the guide groove 241. Preferably, the drive screw 242 is threadedly fitted with a translation block 243 that can be movably embedded in the guide groove 241, so that the rotation of the drive screw 242 can drive the translation block 243 to perform directional translation under the guidance and limitation of the guide groove 241. Preferably, one end of the drive screw 242 passes through the guide groove 241 and is connected to the translation drive unit 244 mounted on the outer end wall of the guide groove 241. Preferably, the translation drive unit 244 can be a high-torque, high-precision stepper motor of model HYH2-320A. The translation drive unit 244 can controllably make the drive screw 242 rotate bit by bit, reducing the translation unit amount of the translation block 243 and improving the translation accuracy of the translation block 243. Thus, the two high-precision translation mechanisms 24 drive the translation on two mutually perpendicular and co-projection planes, realizing high-precision adjustment of the rotation center line, so as to facilitate the precise positioning of different turning rotation center lines. This allows the irregular parts to be reconfigurably positioned with different rotation center lines within the part body according to the requirements, thereby processing different rotating surfaces.

[0028] Preferably, the translation component 4 includes a through guide groove 41, a guide rod 42, a guide slider 43, a mounting plate 44, and a column head 45. Preferably, the four through guide grooves 41 are mounted on the limiting shell 3 in a rotationally symmetrical manner. Preferably, a guide rod 42 parallel to the groove direction is inserted into the through guide groove 41. Preferably, a guide slider 43 capable of sliding along its axis is sleeved on the guide rod 42. Specifically, the top and bottom surfaces of the guide slider 43 extend to the outside of the through guide groove 41. Preferably, a mounting plate 44 for mounting the clamping head 6 and a column head 45 for rotatably connecting with the equivalent drive component 5 are respectively provided on the top and bottom surfaces of the guide slider 43, so that under the drive of the equivalent drive component 5, the four translation components 4 can simultaneously drive the rotationally symmetrically arranged clamping heads 6 to move centripetally or centrifugally. The through-slot 41 and guide rod 42 provided in this application can cooperate to limit the movement direction of the guide slider 43, so that the guide slider 43 can perform directional reciprocating translation under the drive of the equivalent drive component 5, so as to realize the clamping movement of the clamping head 6. The four guide sliders 43 can move synchronously under the drive of the same equivalent drive component 5, realizing the synchronization of movement and the equivalent effect of clamping movement and abutment pressure.

[0029] Preferably, the equivalent drive assembly 5 includes a deflection drive motor 51, a cross-shaped equivalent rotating arm 52, and a sliding link 53. Preferably, the deflection drive motor 51 is mounted on the inner bottom surface of the limiting housing 3. Specifically, the deflection drive motor 51 is a HYH2-150V type high-torque self-locking stepper motor capable of setting output torque and controllably stopping operation. More preferably, a cross-shaped equivalent rotating arm 52, capable of being driven to rotate, is also sleeved on the rotating shaft of the deflection drive motor 51. Preferably, sliding links 53 are rotatably connected to the four ends of the cross-shaped equivalent rotating arm 52. Preferably, the end of the sliding link 53 away from the cross-shaped equivalent rotating arm 52 is rotatably sleeved on the column head 45. Specifically, the rotation of the deflection drive motor 51 can drive the cross-shaped equivalent rotating arm 52 to deflect synchronously, thereby pulling the sliding link 53 to move, which in turn forces the sliding link 53 to pull the guide slider 43 connected to the column head 45 to move in a directional direction in the through guide groove 41. Specifically, when the deflection drive motor 51 starts working, it can drive the cross-shaped equivalent rotating arm 52 to deflect, and the deflected cross-shaped equivalent rotating arm 52 pulls the guide slider 43 to move through the sliding link 53, thereby causing the circumferentially arranged clamping heads 6 to clamp the irregular part in a centripetal motion, and ensuring that the movement of the four clamping heads 6 is equal and the clamping force is equivalent; when the clamping contact of the clamping head 6 reaches the set size, that is, when the output torque of the deflection drive motor 51 reaches the preset threshold, it stops rotating and automatically locks the rotating shaft, thereby ensuring the stability and effectiveness of clamping and avoiding excessive clamping that could damage the surface contour of the irregular part. The threshold setting and automatic switching of the aforementioned deflection drive motor 51 can both be implemented by programming the motor chip, and the locking of the rotating shaft is also a basic function of existing stepper motors. Therefore, this application will not elaborate further. When the deflection drive motor 51 configured in this application drives the cross equivalent rotating arm 52 to rotate, the deflection and pulling motion of the cross equivalent rotating arm 52 can drive the guide slider 43, whose motion direction is limited, to reciprocate and translate. This achieves the equivalent motion of the clamping head 6 on the guide slider 43 and the equivalent clamping contact, thereby reducing the introduction of clamping drive and reducing manufacturing costs. It can also ensure the effectiveness and stability of the centering and clamping of multiple clamping heads 6 and ensure the uniformity of clamping force.

[0030] Preferably, the clamping head 6 includes a connecting seat 61, a guiding connecting mechanism 62, a limiting connecting mechanism 63, a clamping seat 64, and an abutment mechanism 65. Preferably, the connecting seat 61 is mounted on the mounting plate 44 of the translation assembly 4. More preferably, the guiding connecting mechanism 62 and the limiting connecting mechanism 63 are movably passed through the connecting seat 61. Preferably, the end face of the clamping seat 64 near the connecting seat 61 is connected to both the guiding connecting mechanism 62 and the limiting connecting mechanism 63. Preferably, an abutment mechanism 65 is also provided at the end of the clamping seat 64 away from the connecting seat 61. The guide connection mechanism 62 provided in this application can reset the initial working position of the clamping seat 64. When the working position of the clamping seat 64 changes to adapt to different irregular parts, the limiting connection mechanism 63 can position the distance between the different clamping seats 64 and the connecting seats 61, so that the different clamping seats 64 can adapt to the clamping surface of the irregular part with dimensional deviation. Thus, when the rotation center is calibrated according to the requirements, the different clamping seats 64 can compensate for the distance deviation between the different clamping surfaces of the irregular part and the rotation center, thereby ensuring that the four connecting seats 61 that have undergone equal translation can drive the abutment mechanism 65 on the four clamping seats 64 to effectively abut against the four surfaces of the irregular part when the rotation center is pre-calibrated.

[0031] Preferably, the guide slide rod 621 of the guide connecting mechanism 62 is slidably inserted into the connecting seat 61. Preferably, an end block 622 is provided at the end of the guide slide rod 621 away from the clamping seat 64. More preferably, a limiting spring 623 is sleeved on the rod body of the guide slide rod 621 near the end block 622, which can limit the initial distance between the end block 622 and the connecting seat 61. Preferably, the two ends of the limiting spring 623 are respectively connected to the end block 622 and the connecting seat 61. Preferably, four guide slide rods 621 are inserted into the connecting seat 61 in a rotationally symmetrical manner. Preferably, the other end of the guide slide rod 621 is fixedly connected to the side of the clamping seat 64.

[0032] Preferably, the limiting connection mechanism 63 includes a sliding insert plate 631 that slides through the connecting seat 61 and a limiting screw 632 that is inserted into the top surface of the connecting seat 61 and adjustably limits the relative position between the sliding insert plate 631 and the connecting seat 61. Specifically, the limiting screw 632 is threaded into the connecting seat 61, and its inserted front end limits the position of the sliding insert plate 631 in the connecting seat 61 by abutting against the surface of the sliding insert plate 631. Preferably, one end of the sliding insert plate 631 is connected to the side of the clamping seat 64.

[0033] Preferably, the side of the clamping seat 64 has two flared corner grooves 641 with a height difference for mounting the abutment mechanism 65.

[0034] Preferably, the deflection connecting plate 651 of the abutment mechanism 65 is rotatably inserted into the lateral flared corner groove 641 via the insertion shaft 652. Preferably, one end of the deflection connecting plate 651 extending out of the lateral flared corner groove 641 is provided with an obtuse-angled strip 653, and the two ends of the obtuse-angled strip 653 are rotatably provided with abutment wheels 654. Preferably, a limiting torsion spring 655 is provided on the insertion shaft 652 to limit the initial posture of the deflection connecting plate 651 in the lateral flared corner groove 641. Specifically, the top and bottom ends of the insertion shaft 652 are rotatably inserted into the top and bottom surfaces of the groove cavity of the lateral flared corner groove 641. Preferably, the two ends of the limiting torsion spring 655 abut against the surface of the deflection connecting plate 651 and the cavity surface of the lateral flared angle groove 641, and the upper and lower surfaces of the deflection connecting plate 651 are respectively provided with limiting torsion springs 655 with opposite elastic driving force directions, so that the included angle between the deflection connecting plate 651 and the two side walls of the lateral flared angle groove 641 is equal in the initial state. Preferably, the surface of the abutting wheel 654 is also covered with an anti-slip pad layer to improve the stability of the abutment. Specifically, the abutting mechanism 65 can ensure the adaptability to the surface contour of the irregular part by generating a certain amount of deflection, and the double-layer abutting structure can achieve clamping and positioning on two planes, improving the stability of clamping.

[0035] In practical use, the preset compensation amount of the four clamping seats 64 needs to be adjusted according to the outline of the irregular part to ensure that the clamping head 6 can adapt to the same model of workpiece when processing the same batch of workpieces. When changing to another batch of workpieces, the preset compensation amount of the clamping seat 64 is adjusted again to achieve the reconfigurability of the clamping structure, so as to effectively clamp various specifications of irregular parts. Specifically, the adjustment of the preset compensation amount is as follows: under the drive of the equivalent drive component 5, the four guide sliders 43 drive the clamping head 6 to move centripetally, so that the four abutting mechanisms 65 in different directions abut against the surface of the irregular part held by the operator and placed in the center in sequence. During the gradual abutting process, due to the dimensional deviation of the irregular part surface, the abutting mechanisms 65 in the four different directions will have a sequence of abutting. The abutting mechanism 65 that abuts first will force the clamping seat 64 to move closer to the connecting seat 61 to compensate for the displacement difference. At this time, the guide connecting mechanism 62 can realize the guiding function of compensating for displacement. Once the four abutment mechanisms 65 in different directions have achieved effective abutment, the distance between the connecting seat 61 and the clamping seat 64 is locked by adjusting the limiting connection mechanism 63, thereby enabling the clamping head 6 to effectively adapt and clamp the batch of workpieces. When a secondary adaptation adjustment is required, simply release the limiting connection mechanism 63 and repeat the above operation to achieve reconfigurable adaptation clamping for different batches, thus improving the applicability of a single fixture.

[0036] The translation drive unit 244, the deflection drive motor 51 and other electrical components are all electrically connected to the controller and the power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0037] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A special-shaped part turning clamping tool, comprising a plug-in column (1) which is detachably plugged into a mounting seat of a turning machine tool, characterized in that, a centering table (2) which reconfigurably positions a turning rotation center line of a workpiece is connected to an end face of the plug-in column (1), and a limiting shell (3) is arranged on a movement plane away from the plug-in column (1) of the centering table (2), a plurality of translation assemblies (4) are embedded in a rotationally symmetrical manner on an end face of the limiting shell (3) away from the centering table (2), and the translation assemblies (4) are further drivingly connected with equivalent driving assemblies (5) mounted in the limiting shell (3), a clamping head (6) capable of pre-correcting clamping position difference and clamping and limiting a special-shaped part in a circumferential multi-point equivalent manner is further arranged on a translation end of the translation assembly (4).

2. The special-shaped part turning clamping tool according to claim 1, characterized in that, The clamping head (6) comprises a connecting seat (61), a guide connecting mechanism (62), a limiting connecting mechanism (63), a clamping seat (64) and an abutting mechanism (65), wherein, the connecting seat (61) is mounted on a mounting plate (44) of the translation assembly (4), and the guide connecting mechanism (62) and the limiting connecting mechanism (63) which are parallel to each other are movably arranged on the connecting seat (61); the clamping seat (64) is connected with the guide connecting mechanism (62) and the limiting connecting mechanism (63) at the same time near an end face of the connecting seat (61), and the abutting mechanism (65) is further arranged on an end of the clamping seat (64) away from the connecting seat (61).

3. The special-shaped part turning clamping tool according to claim 2, characterized in that, a guide sliding rod (621) of the guide connecting mechanism (62) is slidingly plugged into the connecting seat (61), an end block (622) is arranged on an end of the guide sliding rod (621) away from the clamping seat (64), and a limiting spring (623) is sleeved on a rod body of the guide sliding rod (621) near the end block (622).

4. The special-shaped part turning clamping tool according to claim 3, characterized in that, the limiting connecting mechanism (63) comprises a sliding plug-in plate (631) slidingly arranged on the connecting seat (61) and a limiting screw (632) plugged into a top surface of the connecting seat (61) to adjustably limit the relative position between the sliding plug-in plate (631) and the connecting seat (61).

5. The special-shaped part turning clamping tool according to claim 4, characterized in that, a side of the clamping seat (64) is provided with two side flared corner grooves (641) with height difference and used for mounting the abutting mechanism (65).

6. The special-shaped part turning clamping tool according to claim 5, characterized in that, a deflection connecting plate (651) of the abutting mechanism (65) is deflectionally plugged into the side flared corner groove (641) through a plug-in rotating shaft (652), an obtuse angle strip (653) is arranged on an end of the deflection connecting plate (651) extending out of the side flared corner groove (641), and abutting wheels (654) are rotatably arranged at both ends of the obtuse angle strip (653); a limiting torsional spring (655) capable of limiting an initial posture of the deflection connecting plate (651) in the side flared corner groove (641) is arranged on the plug-in rotating shaft (652).

7. The special-shaped part turning clamping tool according to claim 6, characterized in that, The translation assembly (4) comprises through guide grooves (41), guide rods (42), guide sliding blocks (43), mounting plates (44) and column heads (45), wherein, Four through guide grooves (41) are embedded on the limiting shell (3) in a rotationally symmetrical manner, The guide rods (42) are arranged in the through guide grooves (41) in parallel with the slotting direction, and the guide sliding blocks (43) capable of sliding along the axis are arranged on the guide rods (42); the mounting plates (44) and the column heads (45) are arranged on the top surface and the bottom surface of the guide sliding blocks (43), respectively.

8. The special-shaped part turning clamping tool according to claim 7, characterized in that, The equivalent driving assembly (5) comprises a deflection driving motor (51), a cross equivalent rotating force arm (52) and a sliding connecting rod (53), wherein, The deflection driving motor (51) is installed on the inner bottom surface of the limiting shell (3), and the cross equivalent rotating force arm (52) is arranged on the rotating shaft of the deflection driving motor (51); the sliding connecting rod (53) is connected to the four ends of the cross equivalent rotating force arm (52) in a deflectable manner, and the end of the sliding connecting rod (53) away from the cross equivalent rotating force arm (52) is rotatably sleeved on the column head (45).

9. The special-shaped part turning clamping tool according to claim 8, characterized in that, The centering table (2) comprises a lower table plate (21), a middle table plate (22), an upper table plate (23), high-precision translation mechanisms (24) and guide rails (25), wherein, The lower table plate (21) is installed on the end surface of the plug-in bottom column (1), and the other plate surface is connected with the middle table plate (22) through the high-precision translation mechanisms (24) and guide rails (25) arranged transversely and parallel to each other; The plate surface of the middle table plate (22) away from the lower table plate (21) is connected with the upper table plate (23) through the high-precision translation mechanisms (24) and guide rails (25) arranged longitudinally and parallel to each other.

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