A turning centering clamping tooling and method for conical thin-walled parts

Abstract

The present invention discloses a centering clamping tooling and method for turning a conical thin-walled part, which relates to the technical field of component processing. It includes a conical sleeve and a centering tooling. One end of the conical sleeve is provided with a pin hole, and the other end is provided with a tapered hole, and the aperture of the tapered hole gradually decreases from the outside to the inside; the centering tooling includes a support mechanism and an internal diameter measuring gauge. A plurality of adjusting screws are evenly arranged on the circumference of the support frame of the support mechanism, and the internal diameter gauge rotating shaft on the internal diameter measuring gauge is inserted and matched in the positioning core sleeve on the support frame and extends downward; the conical sleeve is fixedly installed on the base of the centering tooling through a pin shaft, and the pin hole and the tapered hole on the conical sleeve and the positioning core sleeve on the centering tooling are coaxial. The present invention calibrates and centers the workpiece to be machined through the above-mentioned centering tooling, and then uses the turning processing method to machine the part blank, so that the quality of the finished part is stable, effectively solving the problems such as difficult clamping and alignment, unstable quality and low processing efficiency of such parts.

Description

Technical Field

[0001] The present invention belongs to the technical field of parts processing, and particularly relates to a centering clamping tooling and method for turning a conical thin-walled part. Background Art

[0002] At present, for rotary conical sleeve parts, it is quite difficult to determine the clamping position during turning processing. Especially for low-toughness thin-walled conical sleeve parts, since the small end of the part is a conical structure, there are difficulties in processing the large end and the inner cavity during turning. When processing such parts, due to the different sizes of the front and rear end faces of the conical sleeve parts, different positions on the cone need to be trimmed to different degrees during processing, and it is also necessary to ensure that the part always remains in the alignment position during processing to avoid tilting and damaging the part, so as not to affect the quality and production efficiency of the processed product. Summary of the Invention

[0003] Aiming at the defects and problems existing in the processing of thin-walled conical sleeve parts, such as difficult determination of the clamping position, easy deviation from the centering position during processing, and easy damage to the part, which affect the quality and production efficiency of the processed product, the present invention provides a centering clamping tooling and method for turning a conical thin-walled part.

[0004] The solution adopted by the present invention to solve its technical problems is: a centering clamping tooling and method for turning a conical thin-walled part, including a conical sleeve and a centering tooling. The conical sleeve has a columnar structure, with a pin hole at one end and a tapered hole at the other end. The aperture of the tapered hole gradually decreases from the outside to the inside, and the inner diameter of the tapered hole is larger than the inner diameter of the workpiece to be processed. The centering tooling includes a support mechanism and an internal diameter measuring gauge. The support mechanism includes a base and a support frame. The support frame is fixedly installed on one side of the base, and a positioning core sleeve is provided at the top of the support frame, with a plurality of adjusting screws evenly arranged on the periphery. The internal diameter head of the internal diameter measuring gauge is fixedly installed on the support frame through the internal diameter gauge rotating shaft, and the internal diameter gauge rotating shaft on the internal diameter measuring gauge is inserted into the positioning core sleeve and extends downward. The conical sleeve is fixedly installed on the base of the centering tooling through a pin shaft. In the natural state, the pin hole and the tapered hole on the conical sleeve and the positioning core sleeve on the centering tooling are coaxial.

[0005] As a preferred technical solution of the present invention, the tapered hole on the conical sleeve is used to install the workpiece to be processed, and a casting gap is formed between the workpiece to be processed and the tapered hole. A mixed liquid is cast into the casting gap to solidify the blank part and the conical sleeve.

[0006] As a preferred technical solution of the present invention, the internal diameter fixing rod and the internal diameter head on the internal diameter measuring gauge are fixedly installed on the internal diameter gauge rotating shaft, and the internal diameter head is used to press against the inner cavity of the workpiece to be processed for workpiece correction.

[0007] The present invention also discloses a turning processing method for a conical thin-walled part, which applies the above-mentioned centering and clamping tooling for turning processing of a conical thin-walled part, and includes the following steps:

[0008] Step 1, Prepare materials and tools for processing: Prepare processing equipment and various measuring tools, check the functional status of the processing equipment and calibrate the measuring tools. Use acetone to remove impurities on the surface of the part blank, and shield and protect the non-cutting tool parts on the tool shank. Clean the processing and inspection site to ensure that there are no sundries and dust on the site;

[0009] Step 2, Find the center: Fix and install the conical sleeve on the centering tooling through a pin shaft, so that the inner arc of the conical hole of the conical sleeve coincides with the top of the outer cone of the blank of the first cone. Use the internal diameter measuring instrument installed on the centering tooling and combine multiple adjusting screws on the centering tooling to realize the centering and correction of the part blank and the conical sleeve. After the correction is completed, cast and solidify the blank of the first cone and the conical sleeve, and transfer the solidified part blank and the conical sleeve to the lathe station for processing;

[0010] Step 3, Turn the part blank: Remove the part blank and the conical sleeve that have been centered and corrected in the above Step 2 from the centering tooling, and cooperate with special soft jaws to perform the turning processing technology to finally process and form a finished workpiece;

[0011] Step 4, Inspect the processed parts, detect their thickness accuracy, record the detection data, and judge whether the dimensions of the parts meet the requirements of the design drawings.

[0012] In the above-mentioned turning processing method for a conical thin-walled part, the casting and solidification of the part blank and the conical sleeve in Step 2 include the following steps:

[0013] S201, Place the part blank and the conical sleeve cleaned with acetone on the centering tooling, fix the conical sleeve and the centering tooling through a pin shaft, and then align the inner diameter of the large end of the part blank, with the runout ≤ 0.1 mm, and fix it firmly with the centering tooling;

[0014] S202, Heat the resin and the curing agent to the liquid state respectively, with the heating temperature ≤ 100 °C, and pour them into a container and stir and mix evenly according to a certain ratio;

[0015] S203, Pour the evenly stirred mixed liquid into the gap between the conical sleeve and the part blank until it is full;

[0016] S204, Control the temperature in the closed room to 40 °C - 55 °C, and place the above-mentioned poured material and the centering tooling as they are for 30 h to ensure that the casting is fully solidified;

[0017] S205. Remove the part blanks and the tapered sleeves that have been confirmed to be fixed together from the centering fixture and transfer them to the lathe station for machining.

[0018] For the above-mentioned turning method for tapered thin-walled parts, in step three, the part blanks and the tapered sleeves are subjected to turning machining, and its technological process includes:

[0019] S301. Use soft jaws to support the inner cavity blank at the large end, trim the outer circle and end face of the outer circle of the tapered sleeve at the small end, ensure that the outer circle turning is smooth and the end face is flat and shiny, trim the tapered hole of the tapered sleeve, with a roughness Ra of 3.2; turn the outer circle of the large end to be shiny.

[0020] S302. Clamp the outer circle of the tapered sleeve with soft jaws, support the shiny part of the outer circle at the large end with a steady rest, turn the large end face and leave a margin of 1.5 mm; rough and finish turn the inner cavity according to the machining program, leaving a margin of 1.5 mm on each side; the outer circle 15 mm away from the tapered sleeve part is turned to be shiny as the alignment reference.

[0021] S303. Use soft jaws to support the inner hole at the large end, and use the top cover to press against the inner hole of the tapered sleeve, rough and finish turn the outer shape of the part blank, leaving a margin of 1.5 mm on each side; finish turn the outer circle of the tapered sleeve to be shiny.

[0022] S304. Clamp the outer circle of the tapered sleeve tightly with soft jaws, and plane the end face to the total length; finish turn the inner cavity of the part to be completed, and finish turn the outer shape structure of the part to be completed.

[0023] S305. Use soft jaws to support the inner cavity at the large end, press against the end face, the runout of the tapered sleeve part is not more than 0.015 mm, turn off the tapered sleeve with a small cutting amount, and turn the outer shape of the part to be completed.

[0024] For the above-mentioned turning method for tapered thin-walled parts, in step three, use soft jaws to support the inner cavity blank at the large end, and turn the outer circle of the large end to be shiny for a length of 20 mm; clamp the outer circle of the tapered sleeve with soft jaws, and the outer circle 15 mm away from the tapered sleeve part is turned to be shiny for a length of 10 mm as the alignment reference; when rough and fine turning the outer shape of the part blank, the tapered sleeve part is not machined.

[0025] For the above-mentioned turning method for tapered thin-walled parts, in step four, use a special thickness detection fixture to detect the thickness accuracy of the parts. There is an interval of 100 mm along the axial direction, and 8 detection points are evenly arranged in the circumferential direction, and a total of 32 data are detected and recorded.

[0026] For the above-mentioned turning method for tapered thin-walled parts, in step one, the turning tool uses a diamond tool, and there is no iron element substance in the part blank, and it is ensured that it does not come into direct contact with iron-containing objects during the processing and inspection process.

[0027] The above-mentioned turning processing method for a conical thin-walled part. In the second step, the inner diameter dial indicator head is pressed against the inner circle of the part blank, and the rotation shaft of the inner diameter dial indicator is rotated to check the rotation of the dial indicator needle. The part blank is adjusted in multiple directions by adjusting the screw until the swing amount of the inner diameter dial indicator needle at multiple places on the inner circle of the part blank meets the requirements when the rotation shaft of the inner diameter dial indicator is rotated 360 degrees, indicating that the workpiece has been corrected.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a clamping fixture and method for turning processing of low-toughness thin-walled parts. The correction and centering of the part blank are achieved through the cooperation of the conical sleeve and the centering fixture, which is convenient for further turning processing. The overall structure is simple and easy to operate, providing a practical, novel, and low-cost solution for efficient and stable turning processing of conical sleeve parts, and opening up ideas for improving the processing efficiency and ensuring the quality of such parts; the present invention forms a process specification for processing thin-walled conical sleeve parts, which can be directly applied to the processing and manufacturing of similar parts. Moreover, the quality of the finished parts produced by the present invention is stable, solving problems such as difficult clamping and alignment, unstable quality, and low processing efficiency of such parts, and having strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic cross-sectional structure diagram when the fixture of the present invention is used in cooperation;

[0030] Figure 2 For the present invention Figure 1 It is a schematic structure diagram in the A direction in the present invention;

[0031] Figure 3 For the present invention Figure 1 It is a schematic structure diagram of B-B in the present invention;

[0032] Figure 4 It is a schematic cross-sectional structure diagram of the head cone blank of the present invention;

[0033] Figure 5 It is a schematic cross-sectional structure diagram of the conical sleeve of the present invention;

[0034] Figure 6 It is a schematic structure diagram when the head cone blank and the conical sleeve of the present invention are used in cooperation;

[0035] Figure 7 It is a schematic top view structure diagram of the soft jaw of the present invention.

[0036] In the figure: head cone 1, conical sleeve 2, taper hole 3, pin hole 4, claw clamping part 5, three-jaw chuck 6, base 7, support frame 8, adjusting screw 9, inner diameter dial indicator rotation shaft 10, inner diameter dial indicator head 11, inner diameter dial indicator fixing rod 12, positioning pin 13, positioning core sleeve 14, casting gap 15. EMBODIMENTS

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] Please refer to Figure 1-7 , the present invention provides a centering clamping tooling and method for turning a conical thin-walled part. Taking the turning of a typical rotary thin-walled conical structure head cone as an example, the material of the head cone is quartz fiber reinforced composite material. The total length of the part is about 500 mm, and the thinnest part of the wall thickness is only 2.8 mm. It is required to meet the requirements of wave transmission rate and mechanical properties, and also has good impact resistance, reliability, etc. Therefore, the present invention adopts a needled stitched quartz fiber reinforced silica matrix composite material. With the needled stitched structure adapting the fiber fabric as the matrix and the cyclic impregnation / heat treatment composite forming, in addition to having good wave transmission and heat protection properties, it also has good toughness, high thermal shock resistance, mature and reliable, and is widely used. Embodiment

[0039] This embodiment provides a centering clamping tooling for turning a conical thin-walled part, including a conical sleeve 2 and a centering tooling. The conical sleeve 2 has a columnar structure, with a pin hole 4 provided at one end for mating and installing a pin shaft, and a tapered hole 3 opened at the other end. The aperture of the tapered hole 3 gradually decreases from the outside to the inside, and the innermost end has an arc-shaped structure for mating and installing with the head cone 1 of the workpiece to be machined. And the inner diameter of the tapered hole is larger than the inner diameter of the workpiece to be machined, that is, a casting gap 15 is formed between the head cone of the workpiece to be machined and the tapered hole. A mixed liquid is cast into the casting gap to solidify and cure the head cone blank and the conical sleeve; refer to Figure 1 , the centering tooling includes a support mechanism and an inner diameter measuring gauge. The support mechanism includes a base 7 and a support frame 8. The support frame 8 is fixedly installed on one side of the base 7. A positioning core sleeve 14 is provided at the top of the support frame, and a plurality of adjustment screws 9 are evenly arranged on the circumferential side. In this embodiment, adjustment screws are provided in four directions for adjusting the orientation of the head cone blank; the inner diameter gauge rotating shaft 10 on the inner diameter measuring gauge is inserted and installed in the positioning core sleeve 14 and extends downward. The inner diameter gauge head 11 and the inner diameter gauge fixing rod 12 are fixedly installed on the inner diameter gauge rotating shaft, and the inner diameter gauge head presses on the inner cavity of the head cone. The conical sleeve is fixedly installed on the base of the centering tooling through a pin shaft. In the natural state, the pin hole and the tapered hole on the conical sleeve and the positioning core sleeve on the centering tooling are coaxial, and the centering correction of the head cone is carried out through the inner diameter measuring gauge.

[0040] When the centering clamping tool for turning conical thin-walled parts provided by the present invention is specifically used, first, the conical sleeve is fixedly installed on the base of the centering tool through a pin shaft, and then the cleaned head cone blank is installed in the conical sleeve, so that the inner arc of the conical hole of the conical sleeve coincides with the top of the outer cone of the head cone blank. Press the inner diameter dial gauge against the inner circle of the head cone, rotate the rotation shaft of the inner diameter dial gauge and check the rotation of the pointer at the same time, and use the rotation screws on the circumferential side of the head cone to adjust the head cone in four directions until the inner diameter dial gauge needle swings less than 0.5 at four symmetric points on the inner circle of the workpiece when the rotation shaft of the inner diameter dial gauge rotates 360 degrees, which means that the large end inner diameter of the head cone is aligned (runout ≤ 0.1 mm), and the centering and correction of the part blank are completed. Then, a mixed solution is poured into the casting gap to solidify the head cone blank and the conical sleeve for further lathe processing. The structure of the present invention is simple and easy to operate, providing a practical, novel and low-cost solution for efficient and stable turning of conical sleeve parts, and further improving the processing efficiency of such parts. Embodiment

[0041] This embodiment provides a turning method for conical thin-walled parts, applying the centering clamping tool for turning conical thin-walled parts described in the above embodiment, including the following steps:

[0042] Step 1. Prepare materials and tools for processing: Prepare a special soft three-jaw chuck and a special wall thickness measuring tool and calibrate the measuring tool. Prepare part blanks, conical sleeves and centering tools, confirm the availability of diamond turning tools, clean the impurities on the outer surface of the head cone blank with a non-woven fabric dipped in acetone, and shield and protect the non-tool parts on the tool post. The turning tool uses a diamond tool, and the head cone blank does not contain iron element substances. During the processing and inspection process, ensure that it does not come into direct contact with iron-containing objects, clean the processing and inspection site, and ensure that there are no sundries and dust on the site.

[0043] Step 2. Find the centering: Fix the conical sleeve on the centering tool, and after centering the head cone, solidify the head cone blank and the conical sleeve by casting, including the following steps:

[0044] S201. Place the head cone blank and the conical sleeve cleaned with acetone on the centering tool, fix the conical sleeve and the centering tool through a pin shaft, and then use the inner diameter measuring tool on the centering tool to align the large end inner diameter of the head cone blank, with a runout ≤ 0.1 mm, to achieve the centering and correction of the head cone and fix it firmly with the centering tool;

[0045] S202. Heat the resin and the curing agent to the liquid state respectively, with the heating temperature ≤ 100 °C, and pour them into a container and stir and mix evenly according to a certain ratio;

[0046] S203. Pour the evenly stirred mixed liquid into the gap between the conical sleeve and the part blank and fill it up;

[0047] S204. Control the temperature in the enclosed room to 40°C - 55°C, and place the above-poured material together with the centering tooling as it is for 30 h to ensure that the casting solidifies and cures fully.

[0048] S205. Remove the part blanks and the tapered sleeves that have been confirmed to be fixed together from the centering tooling and transfer them to the lathe station for machining.

[0049] Step Three: Perform turning on the head cone blank. Remove the part blanks and the tapered sleeves that have been centered and corrected in Step Two from the centering tooling, and perform the turning process with special soft jaws. The final processed finished workpiece is formed, and its process includes:

[0050] S301. Use the soft jaws to support the inner cavity blank at the large end, and use a small cutting amount to trim the outer circle and end face of the tapered sleeve at the small end to ensure that the outer circle is turned smoothly and the end face is flat and shiny. Trim the tapered hole of the tapered sleeve with a roughness Ra of 3.2; Turn the outer circle of the large end to be shiny (length about 20 mm).

[0051] S302. Clamp the outer circle of the tapered sleeve with the soft jaws, and use the center rest to support the shiny part of the outer circle at the large end. Turn the large end face and leave a margin of 1.5 mm; Roughly and finely turn the inner cavity according to the machining program, leaving a margin of 1.5 mm on each side; Turn the outer circle about 15 mm away from the tapered sleeve part to be shiny (length about 10 mm) as the alignment reference.

[0052] S303. Use the soft jaws to support the inner hole at the large end, and use the top cover to press the inner hole of the tapered sleeve. Roughly and finely turn the outer shape of the part blank (the tapered sleeve part is not processed), leaving a margin of 1.5 mm on each side; Finely turn the outer circle of the tapered sleeve to be shiny.

[0053] S304. Clamp the outer circle of the tapered sleeve tightly with the soft jaws and face it to the total length; Finely turn the inner cavity of the part to be completed, and finely turn the outer shape structure of the part (the tapered sleeve part is not processed).

[0054] S305. Use the soft jaws to support the inner cavity at the large end, lean against the end face, with the runout of the tapered sleeve part not exceeding 0.015 mm. Remove the tapered sleeve with a small cutting amount, and turn the outer shape of the part into a finished head cone.

[0055] Step Four: Inspect the processed finished head cone. Use a coordinate measuring machine to measure the main relevant dimensions of the outer shape and inner cavity and record the inspection results. Use a special thickness inspection tooling to measure the thickness accuracy, that is, at intervals of 100 mm along the axial direction on the head cone and evenly distribute 8 points in the circumferential direction for a total of 32 data points to be measured and recorded, and judge whether the dimensions of the head cone meet the requirements of the design drawing. Embodiment

[0056] To verify that the finished product meets the requirements of the design drawing, in this embodiment, process stability assessment and product quality assessment were carried out on the finished head cone workpiece made according to the above requirements, including:

[0057] (1)The appearance of the sample workpiece is required to be free of burrs, bumps and scratches, and the surface is smooth and clean;

[0058] (2)The wall thickness is required to be uniform, with a thickness error of ±0.03 mm, ensuring the consistency of the wall thickness;

[0059] (3)The runout of the inner and outer walls is required to be ≤0.1 mm;

[0060] (4)The runout of the large end face is required to be ≤0.1 mm.

[0061] Through multi-batch sample processing and inspection, it is detected that the wall thickness of the sample is uniform, the runout of the inner and outer walls and the end face meet the requirements, and the above index detection values are stable. The process stability assessment is passed, the dimensional accuracy of the finished workpiece meets the technical specifications, all the inspection data meet the design requirements, and the product quality passes the assessment.

[0062] The above are only the preferred embodiments of the present invention, which do not limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A turning processing method for conical thin-walled parts, characterized in that: It is operated by using a centering clamping tool for turning processing of conical thin-walled parts, including the following steps: Step 1, Prepare materials and tools for processing: Prepare processing equipment and various measuring tools, check the functional status of the processing equipment and calibrate the measuring tools. Use acetone to remove impurities on the surface of the part blank, and shield and protect the non-cutting tool parts on the tool shank. Clean the processing and inspection site to ensure there are no sundries and dust on the site; Step 2, Find the center: Fix and install the conical sleeve on the centering tool through a pin shaft, so that the inner arc of the conical hole of the conical sleeve coincides with the top of the outer cone of the head cone blank. Use the internal diameter measuring instrument installed on the centering tool and combine multiple adjusting screws on the centering tool to achieve centering and correction of the part blank and the conical sleeve. After the correction is completed, cast and solidify the head cone blank and the conical sleeve, and transfer the solidified part blank and the conical sleeve to the lathe station for processing; Step 3, Turn the part blank: Remove the part blank and the conical sleeve that have been centered and corrected in the above step 2 from the centering tool, and cooperate with special soft jaws to perform the turning processing technology to finally process and form a finished workpiece; Step 4, Inspect the processed parts, detect their thickness accuracy, record the detection data, and judge whether the dimensions of the parts meet the requirements of the design drawings; The conical sleeve in the above step 2 has a columnar structure, with a pin hole at one end and a conical hole at the other end. The aperture of the conical hole gradually decreases from the outside to the inside, and the inner diameter of the conical hole is larger than the inner diameter of the workpiece to be processed. The centering tool in the above step 2 includes a support mechanism and an internal diameter measuring instrument. The support mechanism includes a base and a support frame. The support frame is fixedly installed on one side of the base. The top of the support frame is provided with a positioning core sleeve, and multiple adjusting screws are evenly arranged on the periphery. The internal diameter measuring head on the internal diameter measuring instrument is fixedly installed on the support frame through the internal diameter gauge rotating shaft, and the internal diameter gauge rotating shaft on the internal diameter measuring instrument is inserted and matched in the positioning core sleeve and extends downward. The conical sleeve is fixedly installed on the base of the centering tool through a pin shaft. In the natural state, the pin hole and the conical hole on the conical sleeve and the positioning core sleeve on the centering tool are coaxial.

2. The turning processing method for conical thin-walled parts according to claim 1, characterized in that: The casting and solidification of the part blank and the conical sleeve in the above step 2 includes the following steps: S201, Place the part blank and the conical sleeve cleaned with acetone on the centering tool, fix the conical sleeve and the centering tool through a pin shaft, and then align the inner diameter of the large end of the part blank, with the runout ≤ 0.1 mm, and fix it firmly with the centering tool; S202, Heat the resin and the curing agent to the liquid state respectively, with the heating temperature ≤ 100 °C, and pour them into the container according to the ratio and stir evenly; S203, Pour the evenly stirred mixed liquid into the gap between the conical sleeve and the part blank and fill it up; S204, Control the temperature in the closed room to 40 °C - 55 °C, and place the above-mentioned poured object and the centering tool as they are for 30 h to ensure that the casting is fully solidified; S205. Remove the part blank and the tapered sleeve that are fixed and confirmed together from the centering fixture, and transfer them to the lathe station for machining.

3. The turning method for the tapered thin-walled part according to claim 1, characterized in that: In step three, turning machining is performed on the part blank and the tapered sleeve, and its technological process includes: S301. Use soft jaws to support the inner cavity blank at the large end, trim the outer circle and end face of the outer circle of the tapered sleeve at the small end, ensure that the outer circle is smoothly turned and the end face is flat and shiny, trim the tapered hole of the tapered sleeve, with a roughness Ra of 3.2; turn the outer circle of the large end to be shiny; S302. Clamp the outer circle of the tapered sleeve with soft jaws, support the shiny part of the outer circle at the large end with a steady rest, turn the large end face and leave a margin of 1.5 mm; rough and finish turn the inner cavity according to the machining program, leaving a margin of 1.5 mm on one side; the outer circle 15 mm away from the tapered sleeve part is shiny as the alignment reference; S303. Support the inner hole at the large end with soft jaws, top the inner hole of the tapered sleeve with a top cover, rough and finish turn the outer shape of the part blank, leaving a margin of 1.5 mm on one side; finish turn the outer circle of the tapered sleeve to be shiny; S304. Clamp the outer circle of the tapered sleeve tightly with soft jaws, face the end to the total length; finish turn the inner cavity of the part to be completed, and finish turn the outer shape structure of the part to be completed; S305. Support the inner cavity at the large end with soft jaws, close to the end face, the runout of the tapered sleeve part is not more than 0.015 mm, turn off the tapered sleeve with a small cutting amount, and turn the outer shape of the part to be completed.

4. The turning method for the tapered thin-walled part according to claim 1, characterized in that: In step three, use soft jaws to support the inner cavity blank at the large end, and the length of the shiny outer circle at the large end is 20 mm; clamp the outer circle of the tapered sleeve with soft jaws, and the length of the shiny outer circle 15 mm away from the tapered sleeve part is 10 mm as the alignment reference; the tapered sleeve part is not machined when rough and fine turning the outer shape of the part blank.

5. The turning method for the tapered thin-walled part according to claim 1, characterized in that: In step four, a special thickness detection fixture is used to detect the thickness accuracy of the part. There is an interval of every 100 mm along the axial direction, and 8 detection points are evenly arranged circumferentially, and a total of 32 data are detected and recorded.

6. The turning method for the tapered thin-walled part according to claim 1, characterized in that: The turning tool in step one uses a diamond tool, and the part blank does not contain iron element substances, and it is ensured not to be in direct contact with iron-containing objects during the processing and inspection process.

7. The turning method for the tapered thin-walled part according to claim 1, characterized in that: In step two, the inner diameter dial indicator is pressed against the inner circle of the part blank, rotate the rotating shaft of the inner diameter dial indicator to check the rotation of the pointer, and adjust the part blank in multiple directions by adjusting the screw until the swing amount of the inner diameter dial indicator at multiple places on the inner circle of the part blank meets the requirements when rotating the rotating shaft of the inner diameter dial indicator by 360 degrees, which indicates that the workpiece has been corrected.

8. The turning method for the tapered thin-walled part according to claim 1, characterized in that: The tapered hole on the tapered sleeve is used to install the workpiece to be machined, and a casting gap is formed between the workpiece to be machined and the tapered hole. A mixed liquid is cast into the casting gap to solidify and cure the blank part and the tapered sleeve.

9. The turning method for the tapered thin-walled part according to claim 1, characterized in that: The inner diameter fixing rod and the inner diameter dial gauge head on the inner diameter measuring gauge are fixedly installed on the inner diameter gauge rotating shaft, and the inner diameter dial gauge head is used to press against the inner cavity of the workpiece to be machined for workpiece calibration.

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