Passive smooth full-hole deep hole wall polishing tool with self-adaptive aperture

Abstract

The invention provides a passive smooth full-hole deep hole wall polishing tool with a self-adaptive hole diameter. The polishing tool comprises a main rod mechanism, a heavy cutter tooth mechanism and a return elastic piece. When the electric spindle clamps the polishing tool to rotate, the heavy tooth head on the polishing tool extrudes outwards under the action of centrifugal force to adapt to the hole diameter, passive smooth fine polishing machining is conducted on the hole wall of a drilling or spiral milling hole, cutter teeth are folded and reset by means of the reset elastic piece in the stalling state, the polishing tool can conveniently enter and exit from all the holes, and the polishing efficiency is improved. The problems of efficient hole wall quality improvement and fine polishing of drilling or spiral milling holes with different depths and diameters of large composite material components are solved.

Description

Technical Field

[0001] The invention relates to the technical field of surface polishing, and in particular to an adaptive aperture passive compliant full-hole deep hole wall polishing tool. Background Art

[0002] Carbon fiber reinforced plastic (CFRP) has shown great advantages in advanced equipment industries such as aviation, aerospace, wind power, automobiles and ships, and is widely used due to its advantages of light weight, high strength, fatigue resistance, corrosion resistance, and integral molding. Since the application of CFRP can effectively reduce the structural weight of equipment and improve its mobility, operation economy and energy efficiency, the use of CFRP to replace conventional materials such as metals and non-metals to manufacture structural parts has become the mainstream trend in the high-end equipment manufacturing industry at home and abroad.

[0003] CFRP adopts the lay-up-curing manufacturing process, which can easily realize the integrated design and manufacturing of material structure and achieve the overall near-net shape of large and complex components. Although CFRP can achieve near-net shape, it still needs to obtain the required shape, size accuracy and surface quality through secondary processing to meet the assembly and use requirements of parts. Generally, the main structure does not require additional subtractive processing. The main processing tasks are trimming and hole making in the assembly and connection areas, especially the processing of a large number of assembly holes on the parts. At present, the widely used hole making methods are traditional drilling and spiral milling.

[0004] At the engineering application level, the most concerned issues in the CFRP processing process are its surface quality and defect control. Defects such as delamination, tearing, resin coating, and degradation are important quality issues that directly affect the mechanical properties of the parts. Scholars have performed milling and grinding on T800 laminates to study the effects of milling and grinding on the surface quality of CFRP processing. By comparing the surface micromorphology and surface roughness after milling and grinding, it was found that the surface quality of grinding is significantly better than that of milling. Typical results are compared, such as Figure 8 shown. Figure 8 a is the milling surface, Figure 8 b is the grinding surface. The milling surface shows regular pits. In particular, the 45° fiber angle ply has the worst processing quality, with a large number of pits formed by bending and breaking of bundled fibers, while the 90° and 135° fiber angle ply have serious resin coating. The grinding surface shows fixed vertical ridges as a whole, with almost no pits, and all fiber angle ply and fiber fractures are clearly visible, without obvious resin coating.

[0005] Performing secondary passive soft finishing polishing on the hole wall obtained by drilling or spiral milling of CFRP components to remove the microscopic significant defect layer caused by drilling or spiral milling as much as possible is an effective method to improve the hole processing quality and mechanical properties of the workpiece. Therefore, it is of great significance to develop an efficient full-hole deep hole wall soft polishing tool that can adapt to the hole diameter. Summary of the invention

[0006] The purpose of the present invention is to provide an adaptive aperture passively compliant full-hole deep hole wall polishing tool to solve the problems existing in the prior art.

[0007] The technical solution adopted to achieve the purpose of the present invention is as follows: an adaptive aperture passive compliant full-hole deep hole wall polishing tool includes a main rod mechanism, two heavy tooth mechanisms and two return springs.

[0008] The main rod mechanism comprises a main rod frame, a wire pressing support block, a wire pressing block, a wire pressing support block extruding screw, a wire pressing block extruding screw and a return spring sheet fixing screw.

[0009] The main rod frame includes a clamping handle, a transition section and an assembly structure portion which are coaxially arranged in sequence. The clamping handle and the transition section are both cylindrical. The radius of the transition section is smaller than the radius of the clamping handle. The assembly structure portion is a curved surface body as a whole. The assembly structure portion includes a top, a bottom surface and four side surfaces. The cross section of the assembly structure portion is a straight-sided ellipse (that is, the two opposite sides of the rectangle are replaced by two identical arcs, and the area of ​​the newly enclosed figure is larger than the area of ​​the original rectangle). The radius of the arc segment corresponding to the straight-sided ellipse is equal to the radius of the transition section. The four side surfaces of the assembly structure portion include two planes and two curved surfaces. The two planes are marked as characteristic planes. A restoring spring fixing threaded hole and a rectangular guide groove are provided on the upper part of the characteristic plane. The restoring spring fixing threaded hole is located above the rectangular guide groove. The rectangular guide groove passes through the two characteristic planes. An axial center hole is provided on the lower surface of the assembly structure portion. The axial center hole is connected to the rectangular guide groove. A wire pressing support block mounting groove is also provided on the lower surface of the assembly structure portion. The wire pressing support block mounting groove passes through the two characteristic planes. The two characteristic planes are respectively provided with a countersunk threaded hole I and a countersunk threaded hole II at the position of the installation groove. The countersunk threaded hole II is directly opposite to the axial center hole.

[0010] The wire pressing support block is a rectangular parallelepiped as a whole. A rectangular wire pressing block mounting groove is provided in the middle of the wire pressing support block. The wire pressing block is a rectangular parallelepiped as a whole. A central wire hole is provided on the wire pressing block. The wire pressing block is made of rubber material. The wire pressing block is accommodated in the wire pressing block mounting groove. The wire pressing support block is accommodated in the wire pressing support block mounting groove. The wire pressing support block extrusion screw is screwed into the countersunk threaded hole I, and the wire pressing support block is tightened or loosened by tightening or loosening. The wire pressing block extrusion screw is screwed into the countersunk threaded hole II, and the wire pressing block is squeezed or loosened by tightening or loosening.

[0011] Each heavy blade gear mechanism includes a heavy tooth head, a connection screw and a limit rope. The heavy tooth head includes a slider and an arc surface working part. The arc surface working part is an arched cylinder. The slider is a rectangular parallelepiped as a whole. The corresponding chord length of the arc surface working part is equal to the width of the slider. The corresponding radius of the arc surface working part is equal to the radius of the transition section. A polishing layer is electroplated on the arc surface of the arc surface working part. The slider is arranged on the arc surface working part. One side of the slider is attached to the plane side of the arc surface working part, and the other side is provided with a countersunk threaded hole. The upper surface of the slider is flush with the upper surface of the slider, and the lower surface is spaced from the lower surface of the slider. The slider is embedded in a rectangular guide groove. The lower surface of the arc surface working part is flush with the lower surface of the assembly structure. In the non-working state, the arc surface working part covers the outlet of the wire pressing support block installation slot located at the characteristic plane. The two heavy tooth heads and the main rod frame form a complete cylinder within the height range of the arc surface working part. The connection screw is screwed into the countersunk threaded hole. One end of the limit rope is fastened to the connection screw, and the other end passes through the rectangular guide rail groove and the central wire hole in sequence. Under the extrusion of the wire pressing block extrusion screw, the central wire hole is deformed to clamp the limit rope.

[0012] The restoring spring sheet includes a straight mounting section and an elastic claw extending from the straight mounting section by bending. The straight mounting section is provided with a mounting hole. The restoring spring sheet is mounted on the characteristic plane through the mounting hole and the restoring spring sheet fixing threaded hole. The tail end of the elastic claw abuts against the arc surface of the extrusion arc surface working part.

[0013] During operation, the heavy tooth head slides outwards to adapt to the aperture under the action of centrifugal force and squeezes the hole wall to generate polishing normal pressure. The limit rope restricts the heavy tooth head from completely sliding out of the rectangular guide groove. After the stop state, the return spring sheet presses the heavy tooth head to close and reset.

[0014] Furthermore, the heavy tooth head is made of alloy steel.

[0015] Furthermore, the restoring spring piece is made of an integrated stamped spring steel sheet.

[0016] Furthermore, the thickness of the restoring spring is 0.5-1.5 mm.

[0017] Furthermore, the limiting rope is made of thin wax thread.

[0018] Furthermore, the diameter of the limit rope is 0.2-0.3 mm. The diameter of the wire hole is 0.25-0.35 mm.

[0019] Furthermore, during the processing, the limit rope is tied to the heavy blade tooth mechanism so that the depth of the slider portion inserted into the rectangular guide rail groove is not less than 1.5 mm at any time.

[0020] Furthermore, the electroplated polishing layer is made of diamond and the average abrasive particle size of the polishing layer is 10 um.

[0021] The technical effect of the present invention is unquestionable: when rotating at high speed, the heavy tooth head squeezes the adaptive aperture outward under the action of centrifugal force, and performs passive and smooth fine polishing on the hole wall of the composite material component drilled or spiral milled hole, which is convenient for the polishing tool to enter and exit each hole, and solves the problem of efficient hole wall quality improvement and fine polishing of drilling or spiral milling holes of different depths and diameters of large composite material components. At the same time, the electroplated working surface is easy to replace after wear, and only the heavy tooth head is simply replaced to obtain a new working surface, which reduces the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a three-dimensional cross-sectional structure;

[0023] Figure 2 The main rod frame three-view and axial view; Figure 2 a~2d are different views of the main pole frame;

[0024] Figure 3 The three-view and axial view of the heavy tooth head; Figure 3 a~3d are different views of the heavy tooth head;

[0025] Figure 4 To restore the three-view and axonometric views of the shrapnel; Figure 4 a~4d are different views of the recovery shrapnel;

[0026] Figure 5 The three-view and axial view of the wire pressing support block; Figure 5 a~5d are different views of the wire pressing support block;

[0027] Figure 6 The three-view and axial view of the wire pressing block; Figure 6 a~6d are different views of the crimping block;

[0028] Figure 7 This is a state diagram of the tool being stationary and rotating to polish the hole wall;

[0029] Figure 8A typical comparison of the surface micromorphology and surface roughness of CFRP after milling and grinding.

[0030] In the figure: main rod mechanism 1, main rod frame 11, clamping handle 110, assembly structure part 111, characteristic plane 1111, restoring spring fixing threaded hole 1112, rectangular guide groove 1113, axial center hole 1114, wire pressing support block mounting groove 1115, countersunk threaded hole I 1116, countersunk threaded hole II 1117, transition section 112, wire pressing support block 12, wire pressing block mounting groove 121, wire pressing block 13, center wire hole 131, wire pressing support block extrusion screw 14, wire pressing block extrusion screw 15, restoring spring fixing screw 16, heavy knife tooth mechanism 2, heavy tooth head 21, wiring screw 22, limiting rope 23, slider part 211, arc surface working part 212, countersunk threaded hole 2111, restoring spring 3, straight mounting section 31, mounting hole 311, elastic claw 32. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0032] Embodiment 1:

[0033] See also Figures 1 to 7 The present embodiment provides an adaptive aperture passive compliant full-hole deep hole wall polishing tool, characterized in that it includes a main rod mechanism 1, two heavy tooth mechanisms 2 and two return springs 3.

[0034] The main rod mechanism 1 includes a main rod frame 11 , a wire pressing support block 12 , a wire pressing block 13 , a wire pressing support block squeezing screw 14 , a wire pressing block squeezing screw 15 and a return spring fixing screw 16 .

[0035] The main rod frame 11 includes a clamping handle 110, a transition section 112 and an assembly structure 111 which are coaxially arranged in sequence. The clamping handle 110 and the transition section 112 are both cylindrical. The radius of the transition section 112 is smaller than the radius of the clamping handle 110. The assembly structure 111 is a curved surface as a whole. The assembly structure 111 includes a top, a bottom and four side surfaces. The cross section of the assembly structure 111 is a straight-sided ellipse, that is, the two opposite sides of the rectangle are replaced by two identical arcs, and the area of ​​the newly enclosed figure is larger than the area of ​​the original rectangle. The radius of the arc segment corresponding to the straight-sided ellipse is equal to the radius of the transition section 112. The four side surfaces of the assembly structure 111 include two planes and two curved surfaces. The two planes are marked as characteristic planes 1111. The upper part of the characteristic plane 1111 is provided with a restoring spring fixing threaded hole 1112 and a rectangular guide groove 1113. The restoring spring fixing threaded hole 1112 is located above the rectangular guide groove 1113. The rectangular guide groove 1113 passes through the two characteristic planes 1111. An axial center hole 1114 is provided on the lower surface of the assembly structure 111. The axial center hole 1114 is connected to the rectangular guide groove 1113. A wire pressing support block mounting groove 1115 is also provided on the lower surface of the assembly structure 111. The wire pressing support block mounting groove 1115 passes through the two characteristic planes 1111. Countersunk threaded holes I1116 and countersunk threaded holes II1117 are respectively provided at the positions of the mounting grooves 1115 on the two characteristic planes 1111. The countersunk threaded holes II1117 are opposite to the axial center hole 1114.

[0036] The wire pressing support block 12 is a rectangular parallelepiped as a whole. A rectangular wire pressing block mounting groove 121 is provided in the middle of the wire pressing support block 12. The wire pressing block 13 is a rectangular parallelepiped as a whole. A central wire hole 131 is provided on the wire pressing block 13. The wire pressing block 13 is made of rubber material. The wire pressing block 13 is accommodated in the wire pressing block mounting groove 121. The wire pressing support block 12 is accommodated in the wire pressing support block mounting groove 1115. The wire pressing support block squeezing screw 14 is screwed into the countersunk threaded hole I1116, and the wire pressing support block 12 is tightened or loosened by tightening or loosening. The wire pressing block squeezing screw 15 is screwed into the countersunk threaded hole II1117, and the wire pressing block 13 is squeezed or loosened by tightening or loosening.

[0037] Each heavy tooth mechanism 2 includes a heavy tooth head 21, a connection screw 22 and a limit rope 23. The heavy tooth head 21 includes a slider 211 and an arc surface working part 212. The arc surface working part 212 is an arcuate cylinder. The slider 211 is a rectangular parallelepiped as a whole. The corresponding chord length of the arc surface working part 212 is equal to the width of the slider 211. The corresponding radius of the arc surface working part 212 is equal to the radius of the transition section 112. A polishing layer is electroplated on the arc surface of the arc surface working part 212. The slider 211 is arranged on the arc surface working part 212. One side of the slider 211 is attached to the plane side of the arc surface working part 212, and the other side is provided with a countersunk threaded hole 2111. The upper surface of the slider 211 is flush with the upper surface of the slider 211, and the lower surface is spaced apart from the lower surface of the slider 211. The slider 211 is embedded in the rectangular guide groove 113. The lower surface of the arc working part 212 is flush with the lower surface of the assembly structure part 111. In the non-working state, the arc working part 212 covers the outlet of the wire pressing support block installation groove 1115 located at the characteristic plane 1111. The two heavy tooth heads 21 and the main rod frame 11 form a complete cylinder within the height range of the arc working part 212. The wiring screw 22 is screwed into the countersunk threaded hole 2111. One end of the limiting rope 23 is bolted to the wiring screw 22, and the other end passes through the rectangular guide groove 1113 and the center wire hole 131 in turn. Under the extrusion of the wire pressing block extrusion screw 15, the center wire hole 131 of the wire pressing block 13 is deformed to clamp the limiting rope 23.

[0038] The restoring spring piece 3 includes a straight mounting section 31 and an elastic claw 32 extending from the straight mounting section 31. The straight mounting section 31 is provided with a mounting hole 311. The restoring spring piece 3 is mounted on the characteristic plane 1111 through the mounting hole 311 and the restoring spring piece fixing threaded hole 1112. The tail end of the elastic claw 32 abuts against the arc surface of the extrusion arc surface working portion 212.

[0039] During operation, the electric spindle clamps the polishing tool and rotates, and the heavy tooth head 21 slides outwards to adapt to the aperture under the action of centrifugal force, and squeezes the hole wall to generate polishing normal pressure, and performs passive and smooth fine polishing on the hole wall of the composite material component drilled or spiral milled hole. The limit rope 23 limits the heavy tooth head 21 from completely sliding out of the rectangular guide groove 1113. After the stop state, the return spring 3 presses the heavy tooth head 21 to retract and reset.

[0040] This embodiment facilitates the polishing tool to enter and exit each hole, solving the problem of high-efficiency hole wall quality improvement and fine polishing processing of drilling or spiral milling holes of different depths and diameters of large composite components. At the same time, the electroplated working surface is easy to replace after wear, and only the heavy tooth head is simply replaced to obtain a new working surface, reducing the cost of use.

[0041] Embodiment 2:

[0042] The main contents of this embodiment are the same as those of Embodiment 1, wherein the material of the heavy tooth head 21 is alloy steel. The restoring spring sheet 3 is made of an integrated stamped spring steel sheet. The thickness of the restoring spring sheet 3 is 0.5-1.5 mm. The limiting rope 23 is made of a thin wax wire. The diameter of the limiting rope 23 is 0.2-0.3 mm. The diameter of the wire hole 131 is 0.25-0.35 mm. During the processing, the limiting rope 23 pulls the heavy tooth mechanism 2 so that the depth of the slider 211 inserted into the rectangular guide groove 113 at any time is not less than 1.5 mm. The material of the electroplated polishing layer is diamond. The average abrasive particle size of the polishing layer is 10 um.

[0043] Embodiment 3:

[0044] The main contents of this embodiment are the same as those of the first embodiment, wherein the limit rope can be processed to a precise hole diameter by precisely adjusting the limit length l. The processing hole diameter range is d1 to d1+2*(h1-1.5) mm, d1 is the main rod frame diameter, and h1 is the slider thickness.

[0045] Embodiment 4:

[0046] The main structure of this embodiment is the same as that of embodiment 1. Furthermore, the diameter of the arc surface of the arc working part 212 facing outward is the same as the diameter of the assembly structure part 111. The lower end of the arc working part 212 exceeds the slider part 211 by a distance, and its bottom is flush with the bottom of the main rod frame 11.

[0047] The slide block 211 can be completely placed in the rectangular guide groove 1113. At this time, the arc surface working portion 212 and the main rod frame 11 form a complete cylinder within the length range of the heavy tooth head 21.

[0048] Embodiment 5:

[0049] The main structure of this embodiment is the same as that of the embodiment 1. Furthermore, the diameter of the clamping handle 110 is 8 mm and the length is 20 mm. The diameter d1 of the assembly structure 111 is 7.8 mm and the length is 45 mm.

[0050] The characteristic plane 1111 has a width of 4 mm and a length of 44 mm, and a length of a portion of the upper assembly structure 111 where the characteristic plane 1111 is not arranged is 1 mm.

[0051] The specification of the restoring spring fixing threaded hole 1112 is M1, the depth is 3mm, and two are arranged on the upper part of each plane of the characteristic plane 1111. The width of the rectangular guide groove 1113 is 4mm, the length is 28mm, and the length of the lower part thereof is 3mm.

[0052] The diameter of the axial center hole 1114 is 3 mm. The wire pressing support block installation groove 1115 is arranged in the middle of the bottom structure, with a radial length of 6.93 mm, a width perpendicular to the radial direction of 1.4 mm, and an axial depth of 2 mm.

[0053] The countersunk threaded hole I 1116 and the countersunk threaded hole II 1117 are threaded through holes with a specification of M1, and the screw head can just be completely placed in the countersunk hole.

[0054] The wire pressing support block 12 has a length of 6.93 mm, a thickness (width) of 1.4 mm, and a height (depth) of 2 mm, and can be completely placed in the wire pressing support block installation groove 1115 .

[0055] The length of the wire pressing block installation groove 121 is 2mm, the width is 1.2mm, and the depth is 0.7mm. The wire pressing block 13 is 2mm in length, 1.2mm in width, and 0.7mm in height, and can be completely placed in the wire pressing block installation groove 121. The diameter of the central wire hole 131 is 0.3mm.

[0056] The wire pressing support block extrusion screw 14 is a round head screw with a specification of M1╳1.85, the wire pressing block extrusion screw 15 is a round head screw with a specification of M1╳2.8, and the return spring fixing screw 16 is a round head screw with a specification of M1╳3.

[0057] Embodiment 6:

[0058] The main structure of this embodiment is the same as that of embodiment 1. Furthermore, the length of the slider portion 211 is 28 mm, the width is 4 mm, and the thickness h1 is 2.96 mm. The length of the arc surface working portion 212 is 31 mm, and the length of the lower end extending beyond the slider portion 211 is 3 mm.

[0059] The countersunk threaded hole 2111 has a specification of M1, a depth of 2.5 mm, and a countersunk depth of 0.6 mm. The connection screw 22 is a round head screw with a specification of M1×1.9.

[0060] The diameter of the arc surface of the arc working portion 212 facing outward is 7.8 mm.

[0061] The limiting rope 23 has a diameter of 0.2 mm and a length of about 15 mm.

[0062] The processing hole diameter range is 7.8~10.72mm.

[0063] Embodiment 7:

[0064] The main structure of this embodiment is the same as that of embodiment 1. Furthermore, the thickness of the restoring spring sheet is 1 mm and the width is 4 mm. The length of the straight installation section is 4.65 mm. When the heavy tooth head 21 is in the closed reset state, the height of the elastic claw is about 10 mm. The diameter of the installation hole 311 is 1 mm.

[0065] Embodiment 8:

[0066] The main structure of this embodiment is the same as that of embodiment 1. Furthermore, the heavy tooth head 21 is made of high-density stainless steel. The electroplated polishing layer on the arc surface of the arc working part 212 is made of diamond. The average abrasive particle size of the polishing layer is 10 um.

[0067] The restoring spring sheet 3 is a spring steel sheet formed by integrated stamping.

[0068] The limiting rope 23 is a thin wax thread with low elasticity.

Claims

1. An adaptive aperture passive compliance full-hole deep hole wall polishing tool, characterized in that: It comprises a main rod mechanism (1), two heavy blade tooth mechanisms (2) and two return springs (3); The main rod mechanism (1) comprises a main rod frame (11), a wire pressing support block (12), a wire pressing block (13), a wire pressing support block extrusion screw (14), a wire pressing block extrusion screw (15) and a return spring fixing screw (16); The main rod frame (11) comprises a clamping handle (110), a transition section (112) and an assembly structure (111) which are coaxially arranged in sequence; the clamping handle (110) and the transition section (112) are both cylindrical; the radius of the transition section (112) is smaller than the radius of the clamping handle (110); the assembly structure (111) is a curved surface as a whole; the assembly structure (111) comprises a top surface, a bottom surface and four side surfaces; the cross section of the assembly structure (111) is a straight-edged ellipse; the radius of the arc segment corresponding to the straight-edged ellipse is equal to the radius of the transition section (112); the four side surfaces of the assembly structure (111) include two planes and two curved surfaces; the two planes are marked as characteristic planes (1111); the upper part of the characteristic plane (1111) is provided with a restoring spring fixing threaded hole (1112) and a rectangular guide rail The groove (1113) of the assembly structure (1111) is provided with an axial center hole (1114); the axial center hole (1114) is connected with the rectangular guide groove (1113); the lower surface of the assembly structure (111) is also provided with a wire pressing support block installation groove (1115); the wire pressing support block installation groove (1115) passes through the two characteristic planes (1111); the two characteristic planes (1111) are respectively provided with a countersunk threaded hole I (1116) and a countersunk threaded hole II (1117) at the position of the installation groove (1115); the countersunk threaded hole II (1117) is directly opposite to the axial center hole (1114); The wire pressing support block (12) is a rectangular parallelepiped as a whole; a rectangular wire pressing block installation groove (121) is provided in the middle of the wire pressing support block (12); the wire pressing block (13) is a rectangular parallelepiped as a whole; a central wire hole (131) is provided on the wire pressing block (13); the wire pressing block (13) is made of rubber material; the wire pressing block (13) is accommodated in the wire pressing block installation groove (121); the wire pressing support block (12) is accommodated in the wire pressing support block installation groove (1115); the wire pressing support block squeezing screw (14) is screwed into the countersunk threaded hole I (1116), and the wire pressing support block (12) is tightened or loosened to tighten or loosen; the wire pressing block squeezing screw (15) is screwed into the countersunk threaded hole II (1117), and the wire pressing block (13) is squeezed or loosened by tightening or loosening; Each heavy blade tooth mechanism (2) comprises a heavy tooth head (21), a connecting screw (22) and a limit rope (23); the heavy tooth head (21) comprises a sliding block (211) and an arc surface working block (212); the arc surface working block (212) is an arched column; the sliding block (211) is a rectangular parallelepiped as a whole; the length of the corresponding chord of the arc surface working block (212) is equal to the width of the sliding block (211); the length of the corresponding half ... The radius of the transition section (112) is equal to the radius of the transition section (112); the arc surface of the arc surface working portion (212) is electroplated with a polishing layer; the slider portion (211) is arranged on the arc surface working portion (212); one side of the slider portion (211) is attached to the plane side of the arc surface working portion (212), and the other side is provided with a countersunk threaded hole (2111); the upper surface of the slider portion (211) is flush with the upper surface of the slider portion (211), and the lower surface is flush with the slider portion (211). There is a gap between the lower surface of the arc surface working part (211); the slider part (211) is embedded in the rectangular guide groove (113); the lower surface of the arc surface working part (212) is flush with the lower surface of the assembly structure part (111); in the non-working state, the arc surface working part (212) covers the outlet of the wire pressing support block installation groove (1115) located at the characteristic plane (1111); the two heavy tooth heads (21) and the main rod frame (11) form a complete cylinder within the height range of the arc surface working part (212); the wiring screw (22) is screwed into the countersunk threaded hole (2111); one end of the limit rope (23) is fastened to the wiring screw (22), and the other end passes through the rectangular guide groove (1113) and the center wire hole (131) in sequence; under the extrusion of the wire pressing block extrusion screw (15), the center wire hole (131) of the wire pressing block (13) is deformed to clamp the limit rope (23); The restoring spring piece (3) comprises a straight mounting section (31) and an elastic claw (32) extending from the straight mounting section (31) by bending; the straight mounting section (31) is provided with a mounting hole (311); the restoring spring piece (3) is mounted on the characteristic plane (1111) through the mounting hole (311) and the restoring spring piece fixing threaded hole (1112); the tail end of the elastic claw (32) abuts against the arc surface of the extrusion arc surface working part (212); When working, the heavy tooth head (21) slides outwards to adapt to the aperture under the action of centrifugal force and squeezes the hole wall to generate polishing normal pressure; the limiting rope (23) limits the heavy tooth head (21) from completely sliding out of the rectangular guide groove (1113); after the rotation stops, the return spring sheet (3) presses the heavy tooth head (21) to close and reset.

2. The adaptive aperture passive compliance full-hole deep hole wall polishing tool according to claim 1, characterized in that: The material of the heavy tooth head (21) is alloy steel.

3. The adaptive aperture passive compliance full-hole deep hole wall polishing tool according to claim 1, characterized in that: The restoring spring sheet (3) is made of an integrated stamped spring steel sheet.

4. The adaptive aperture passive compliance full-hole deep hole wall polishing tool according to claim 3, characterized in that: The thickness of the restoring spring sheet (3) is 0.5-1.5 mm.

5. The adaptive aperture passive compliance full-hole deep hole wall polishing tool according to claim 1, characterized in that: The limiting rope (23) is made of thin wax thread.

6. The adaptive aperture passive compliance full-hole deep hole wall polishing tool according to claim 5, characterized in that: The diameter of the limiting rope (23) is 0.2-0.3 mm; the diameter of the wire hole (131) is 0.25-0.35 mm.

7. The adaptive aperture passive compliance full-hole deep hole wall polishing tool according to claim 1, characterized in that: During the processing, the limiting rope (23) is tied to the heavy blade tooth mechanism (2), so that the depth of the sliding block (211) inserted into the rectangular guide groove (113) is not less than 1.5 mm at any time.

8. The adaptive aperture passive compliance full-hole deep hole wall polishing tool according to claim 1, characterized in that: The material of the electroplated polishing layer is diamond; the average particle size of the abrasive of the polishing layer is 10um.

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