Device and method for detecting curved surface contour of rotary body

Abstract

The invention provides a device and method for detecting the curved surface contour of a rotary body, and belongs to the technical field of aero-engine part manufacturing, the device comprises a base, the base is provided with a first circular groove, and the inner diameter of the first circular groove is matched with the outer diameter of one end of a rotary body part; the molded surface sample plates are mounted on the sliding seat, and the inner wall surfaces of the molded surface sample plates are matched with the designed molded surface of the outer wall of the rotary body part to be detected; the cover plate is installed on the base through a guide column, a second circular groove is formed in the side face, facing the base, of the cover plate, the inner diameter of the second circular groove is matched with the outer diameter of the other end of the rotary body part, and the first circular groove and the second circular groove are coaxial; a to-be-detected part is placed between the molded surface sample plates, the part corresponds to the first circular groove and the second circular groove, and when the inner ring of the annular structure defined by the molded surface sample plates is matched with the design size of the outer wall of the to-be-detected part, the distance between the part and the molded surface sample plates is detected to judge whether the curved surface contour of the part is qualified or not.

Description

Technical Field

[0001] The present application relates to the field of aerospace engine parts manufacturing, and in particular to a device and method for detecting the contour of a rotating body's curved surface. Background Art

[0002] Thin-walled sheet metal welding parts are distributed in different parts of aircraft engines. The thin-walled rotating body curved surface part belongs to the combustion chamber part of the engine. It is made of stainless steel with a thickness of 2mm. The specific structure is made of sheet metal through rolling, welding, forming and turning. The curved surface after forming is S-shaped. The quality of the surface has a great influence on the airflow passing through, further affecting the performance of the combustion chamber parts and the entire engine. The drawing requires that the value of the surface contour relative to the center of the workpiece is 0.5mm, that is, the surface contour value is 0.5mm. In order to detect whether the surface meets the requirements, it needs to be detected by corresponding methods. At present, it can be detected by three-coordinate or blue light scanner, but the premise of this detection method is to compile a special program and detect at a fixed position. If the surface needs to be detected during the processing, it is inconvenient and cannot be predicted in time whether the surface is qualified or not. Summary of the invention

[0003] In view of this, the present application provides a device and method for detecting the contour of the curved surface of a rotating body, which solves the problems in the prior art and can quickly, conveniently, reliably and effectively detect whether the contour of the curved surface of a rotating body meets the requirements of the drawing.

[0004] On the one hand, the present application provides a device for detecting the curved surface profile of a rotating body, which adopts the following technical solution:

[0005] A device for detecting the curved surface profile of a rotating body, comprising:

[0006] A base, used for placing the rotating part to be inspected, wherein the base is provided with a first circular groove, and the inner diameter of the first circular groove matches the outer diameter of one end of the rotating part;

[0007] A plurality of sliding seats are slidably arranged on the base, the sliding seats are located at the outer periphery of the first circular groove, the plurality of sliding seats are distributed along the circumference of the first circular groove, and the sliding seats slide along the radial direction of the first circular groove;

[0008] A plurality of profile templates corresponding to the sliding seat one by one, the profile templates are installed on the sliding seat, and the wall surface of the profile template facing the central axis of the first circular groove matches the designed profile of the outer wall of the rotating body part to be tested;

[0009] A plurality of limit pins are installed on the base, the limit pins correspond to the sliding seats one by one, and when the sliding seats are all in contact with the limit pins, the inner ring of the annular structure surrounded by the plurality of profile templates matches the design size of the outer wall of the rotating body part to be tested;

[0010] A plurality of guide posts are mounted on the base. When the rotating part to be inspected is placed on the base, the guide posts are located inside the rotating part to be inspected.

[0011] The cover plate is mounted on the base through the guide column. A second circular groove is provided on the side of the cover plate facing the base. The inner diameter of the second circular groove matches the outer diameter of the other end of the rotating body part. The first circular groove and the second circular groove are coaxial.

[0012] Optionally, the guide column includes a coaxial connecting column and a mounting column, one end of the connecting column is connected to the base, and the mounting column is connected to the other end of the connecting column, the cover plate is provided with a through hole for the mounting column to pass through, the inner diameter of the through hole is smaller than the outer diameter of the connecting column, and a clamping assembly is provided at one end of the mounting column passing through the through hole, and the clamping assembly and the mounting column cooperate to press the cover plate onto the end face of the connecting column away from the base.

[0013] Optionally, the clamping assembly is a rotating pressure plate, one end of the rotating pressure plate is rotatably connected to the cover plate, the other end of the rotating pressure plate is provided with a matching hole, the matching hole is used to accommodate the mounting column, and the side of the rotating pressure plate is provided with a through groove for the mounting column to enter the matching hole from the side of the rotating pressure plate, and the end of the mounting column away from the connecting column is threadedly connected with a clamping nut, and the rotating pressure plate is rotated and the through groove approaches the mounting column until the mounting column is located in the matching hole, the rotating pressure plate and the clamping nut are abutted against the side of the cover plate, and the clamping nut is tightened to press the cover plate on the end face of the connecting column away from the base.

[0014] Optionally, the number of the guide columns is an even number, the inner diameter of the through hole is larger than the outer diameter of the mounting column, one of the guide columns is a positioning guide column, the mounting column of the positioning guide column is close to an outer peripheral positioning ring platform at one end of the connecting column, the outer ring of the positioning ring platform is circular, and the outer diameter of the positioning ring platform matches the inner diameter of the through hole;

[0015] The guide column symmetrical to the positioning guide column is a limiting guide column, and a limiting ring is provided on the outer periphery of one end of the mounting column of the limiting guide column close to the connecting column. The outer ring of the limiting ring is a rhombus, and the two side edges of the corresponding longer diagonal of the rhombus of the limiting ring are in contact with the inner wall of the through hole.

[0016] Optionally, the base is provided with a slide groove structure corresponding to the sliding seat one by one, and the slide groove structure includes a relatively arranged block and a limit plate, the block is installed on the base, the block is arranged along the radial direction of the first circular groove toward the side edge of the limit plate, the limit plate abuts against the base on a side away from the baffle, the limit plate is spaced apart from the base on a side close to the baffle, the limit plate is spaced apart from the base on a side close to the baffle, the space between the block and the limit plate and the space between the limit plate and the base form an L-shaped slide groove, and the sliding seat includes a bottom plate located between the limit plate and the base and a main board located between the stop block and the limit plate, the profile template is installed on the main board, and the limit pin is located on the side of the L-shaped slide groove close to the center of the first circular groove.

[0017] Optionally, a locking bolt is threadedly connected to a portion where the limiting plate and the base are spaced apart, and the locking bolt passes through the limiting plate to abut against the base plate.

[0018] Optionally, the base is provided with a circular guide rail located at the outer periphery of the first circular groove, the circular guide rail is provided with a slider sliding along the circular guide rail, the sliding seat is installed on the base through the slider and the circular guide rail, the sliding seat is slidably installed on the slider, and the sliding direction of the sliding seat is along the radial direction of the first circular groove.

[0019] Optionally, the depth of the first circular groove and the second circular groove is 5-10 mm.

[0020] Optionally, the cover plate is a circular ring structure, and a plurality of fan-shaped through grooves are provided on the middle ring of the cover plate.

[0021] On the other hand, the present application provides a method for detecting the contour of a rotating body surface using the following technical solution:

[0022] A method for detecting the contour of a rotating body's curved surface is implemented using the above-mentioned device. The method comprises the following steps:

[0023] Place the rotating body part to be inspected on the base, and install the cover plate so that both ends of the part match the first circular groove and the second circular groove;

[0024] Move the sliding seat so that it abuts the limit pin and fix the position of the sliding seat on the base, and use a feeler gauge to measure the gap between the inner side of the profile template and the rotating part to be tested. If the gap value is less than or equal to the preset value specified in the drawing, the surface profile of the rotating part to be tested is qualified; if the gap value is greater than the preset value specified in the drawing, the surface profile of the rotating part to be tested is unqualified.

[0025] In summary, this application includes the following beneficial technical effects:

[0026] The device of the present application can be used to quickly, conveniently, reliably and effectively detect whether the curved surface profile of a rotating body meets the requirements of the drawing.

[0027] The fan-shaped holes and the circular holes on the base and the fan-shaped holes and the central hole on the cover plate greatly reduce the weight of the entire device.

[0028] The rotating pressure plate is hook-shaped, and the opening position of the hook is for the installation column to enter and exit. The rotating pressure plate is rotatably installed on the cover plate by screws. After the cover plate is assembled, it can be quickly matched with the installation column of the guide column. This avoids the loss caused by the use of a separate pressure plate and can press the rotating part to be inspected through the cover plate within a smaller screwing stroke of the clamping nut.

[0029] The guide column with a positioning ring and a guide column with a diamond-shaped limiting ring at a symmetrical position can accurately ensure that the cover plate is concentric with the base and the rotating body part to be inspected after installation, thereby avoiding deviation of the installed cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 The schematic diagram of the device structure for detecting the curved surface profile of a rotating body;

[0032] Figure 2 A top view of a device for detecting the curved surface contour of a rotating body.

[0033] Explanation of the reference numerals: 1. base; 2. limit plate; 3. sliding seat; 4. profile template; 5. stop block; 6. guide column; 61. connecting column; 62. mounting column; 63. positioning ring platform; 64. clamping nut; 7. locking bolt; 8. lifting ring; 9. limit pin; 10. part; 11. rotating pressure plate; 12. cover plate; 121. through hole. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0035] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0036] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0037] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0038] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0039] An embodiment of the present application provides a device for detecting the contour of a curved surface of a rotating body.

[0040] like Figure 1 and Figure 2 As shown, a device for detecting the curved surface profile of a rotating body comprises:

[0041] The base 1 is used for placing the rotating part 10 to be detected. The base 1 is provided with a first circular groove, and the inner diameter of the first circular groove matches the outer diameter of one end of the rotating part 10.

[0042] A plurality of sliding seats 3 are slidably arranged on the base 1, the sliding seats 3 are located at the outer periphery of the first circular groove, the plurality of sliding seats 3 are distributed along the circumference of the first circular groove, and the sliding seats 3 slide along the radial direction of the first circular groove.

[0043] A plurality of profile templates 4 correspond one to one with the sliding seat 3, and the profile templates 4 are installed on the sliding seat 3, and the wall surface of the profile template 4 facing the central axis of the first circular groove matches the designed profile of the outer wall of the rotating part 10 to be inspected; in one embodiment, the profile template 4 is made of a thin plate with moderate thickness and has an S-shaped cross-section, and the sliding seat 3 moves to the side away from the center of the first circular groove, driving each profile template 4 away from each other, so that the space between each profile template 4 can accommodate the rotating part 10 to be inspected.

[0044] A plurality of limit pins 9 are installed on the base 1, and the limit pins 9 correspond to the sliding seats 3 one by one. When the sliding seats 3 are all in contact with the limit pins 9, the inner circle of the annular structure surrounded by the plurality of profile templates 4 matches the design size of the outer wall of the rotating part 10 to be tested; the profile template 4 ensures that the sliding distance of any profile template 4 is consistent through the limit pins 9.

[0045] A plurality of guide posts 6 are mounted on the base 1 . When the rotating part 10 to be inspected is placed on the base 1 , the guide posts 6 are located inside the rotating part 10 to be inspected.

[0046] The cover plate 12 is mounted on the base 1 through the guide column 6. A second circular groove is provided on the side of the cover plate 12 facing the base 1. The inner diameter of the second circular groove matches the outer diameter of the other end of the rotating body part 10. The first circular groove and the second circular groove are coaxial.

[0047] In one embodiment, the depth of the first circular groove and the second circular groove is 5-10mm. The cover plate 12 is a circular ring structure, and a plurality of fan-shaped through grooves are provided on the middle circle of the cover plate 12. The base 1 is a circular plate, and the base 1 is made of structural steel. The rigidity meets the use requirements, the thickness and weight are moderate, and there are through circular holes and fan-shaped holes processed in the center and the middle circle. Among them, the base 1 corresponds to the large diameter end of the rotating part 10 to be detected, and the cover plate 12 corresponds to the small diameter end of the rotating part 10 to be detected. The fan-shaped holes and circular holes on the base 1 and the fan-shaped holes and the center hole on the cover plate 12 greatly reduce the weight of the entire device.

[0048] The cam 2 is a kind of frame 20 that is provided with the support 1 of the embodiment of the present invention, and the frame 2 has the advantages that: first, the frame 2 has the advantages of being convenient to use and being easy to operate, and second, the frame 2 has the advantages of being convenient to operate and being easy to operate. In one embodiment, the base 1 and the limit plate 2 are directly fixed to the base 1 by bolts, and a positioning pin for positioning is set on the base 1, and corresponding positioning holes are set on the base 1 and the limit plate 2 for positioning when the base 1 and the limit plate 2 are installed.

[0049] A locking bolt 7 is threadedly connected to the portion where the limiting plate 2 and the base 1 are spaced apart. The locking bolt 7 passes through the limiting plate 2 to abut against the base plate.

[0050] When in use, loosen the locking bolt 7 and withdraw the combination of the sliding seat 3 and the profile template 4 outward along the L-shaped groove of the limit plate 2; loosen the clamping nut 64 to loosen the rotating pressure plate 11 and remove the cover plate 12; assemble the rotating part 10 to be inspected with the large end facing down into the first circular groove of the base 1, and then assemble the cover plate 12 and make the through hole 121 on the cover plate 12 cooperate with a part of the positioning ring 63 of the positioning guide column 6, and the second circular groove cooperates with the small end of the rotating part 10 to be inspected, install the rotating pressure plate 11, the mounting column 62 is located in the matching hole, and re-tighten the clamping nut 64. Slowly push the combination of the sliding seat 3 and the profile template 4 toward the center, so that the inner profile of the profile template 4 gradually approaches the rotating part 10 to be tested, and stop when the sliding seat 3 contacts the limit pin 9. Then use a feeler gauge to measure the gap between the cross-sectional profile of the profile template 4 and the rotating part 10 to be tested. If the gap value is less than or equal to the contour value 0.5mm specified in the drawing, the curved surface contour of the rotating part 10 to be tested is qualified; if the gap value is greater than the contour value 0.5mm specified in the drawing, the curved surface contour of the rotating part 10 to be tested is unqualified. After the first workpiece is tested, repeat the above steps to test the next workpiece, and so on!

[0051] In one embodiment, the base 1 is provided with a circular guide rail located on the outer periphery of the first circular groove, the circular guide rail is provided with a slider sliding along the circular guide rail, the sliding seat 3 is installed on the base 1 through the slider and the circular guide rail, the sliding seat 3 is slidably installed on the slider, and the sliding direction of the sliding seat 3 is along the radial direction of the first circular groove; in this embodiment, the base 1 and the limit plate 2 are directly installed on the slider, the slider is installed in the circular guide rail, the guide rail is installed on the base 1, and the base 1 and the limit block are installed on the base 1 through the slider and the circular guide rail.

[0052] The guide column 6 includes a coaxial connecting column 61 and a mounting column 62, one end of the connecting column 61 is connected to the base 1, and the mounting column 62 is connected to the other end of the connecting column 61, and the cover plate 12 is provided with a through hole 121 for the mounting column 62 to pass through, and the inner diameter of the through hole 121 is smaller than the outer diameter of the connecting column 61, and one end of the mounting column 62 passing through the through hole 121 is provided with a clamping assembly, and the clamping assembly and the mounting column 62 cooperate to press the cover plate 12 on the end surface of the connecting column 61 away from the base 1, and the top surface heights of each connecting column 61 are consistent, thereby evenly balancing the force of the cover plate 12.

[0053] The clamping assembly is a rotating pressure plate 11, one end of which is rotatably connected to the cover plate 12, and the other end of the rotating pressure plate 11 is provided with a matching hole, which is used to accommodate the mounting column 62, and the side of the rotating pressure plate 11 is provided with a through groove for the mounting column 62 to enter the matching hole from the side of the rotating pressure plate 11, and the end of the mounting column 62 away from the connecting column 61 is threadedly connected with a clamping nut 64, and the rotating pressure plate 11 is rotated, and the through groove approaches the mounting column 62 until the mounting column 62 is located in the matching hole, and the side of the rotating pressure plate 11 and the clamping nut 64 facing the cover plate 12 abuts, so that the cover plate 12 is pressed against the end surface of the connecting column 61 away from the base 1. In one embodiment, the rotating pressure plate 11 is in the shape of a hook, and the opening position of the hook is for the installation column 62 to enter and exit. The rotating pressure plate 11 is installed on the cover plate 12 by rotating screws. After the cover plate 12 is assembled, it can be quickly matched with the installation column 62 of the guide column 6. In this way, it is avoided that the use of a separate pressure plate is easy to cause loss, and the rotating part 10 to be inspected can be tightened through the cover plate 12 within a smaller screwing stroke of the clamping nut 64.

[0054] The number of the guide columns 6 is an even number, and the inner diameter of the through hole 121 is larger than the outer diameter of the mounting column 62. One of the guide columns 6 is a positioning guide column 6, and the mounting column 62 of the positioning guide column 6 is close to the outer periphery of one end of the connecting column 61 and a positioning ring platform 63. The outer circle of the positioning ring platform 63 is circular, and the outer diameter of the positioning ring platform 63 matches the inner diameter of the through hole 121. The guide column 6 symmetrical to the positioning guide column 6 is a limiting guide column 6, and the mounting column 62 of the limiting guide column 6 is close to the outer periphery of one end of the connecting column 61 and a limiting ring platform is provided. The outer circle of the limiting ring platform is rhombus-shaped, and the two side edges of the corresponding longer diagonal line of the rhombus of the limiting ring platform abut against the inner wall of the through hole 121, and the long diagonal line of the rhombus is parallel to the line connecting the positioning guide column 6 and the limiting guide column 6. Among them, the guide column 6 with a positioning ring 63 and a guide column 6 with a diamond-shaped limit ring at a symmetrical position can accurately ensure that the cover plate 12 is concentric with the base 1 and the rotating part 10 to be detected after installation, thereby avoiding deviation of the cover plate 12 during installation; and the position of the through hole 121 that cooperates with the positioning guide column 6 is marked with engraved lines on the cover plate 12, which ensures the uniqueness of the cooperation during installation, and prevents the cover plate 12 from rotating together with the diamond-shaped limit ring at the symmetrical position.

[0055] In the embodiment of the present application, the upper surface of the base 1, the limit plate 2, the sliding seat 3, and the stopper 5 are all treated with wear-resistant treatment to reduce the wear of the mating surfaces caused by the mutual friction between the components.

[0056] Four lifting rings 8 are arranged on the base 1 to facilitate lifting and transportation.

[0057] In other embodiments, more profile templates 4 may be provided to increase the accuracy of curved surface contour detection.

[0058] The embodiment of the present application also discloses a method for detecting the contour of the curved surface of a rotating body.

[0059] A method for detecting the contour of a rotating body's curved surface is implemented using the above-mentioned device for detecting the contour of a rotating body's curved surface. The method comprises the following steps:

[0060] The rotating body part 10 to be inspected is placed on the base 1, and the cover plate 12 is installed so that the two ends of the part 10 match the first circular groove and the second circular groove.

[0061] Move the sliding seat 3 so that the sliding seat 3 abuts against the limit pin 9 and fix the position of the sliding seat 3 on the base 1, and use a feeler gauge to measure the gap between the inner side of the profile template 4 and the rotating part 10 to be tested. If the gap value is less than or equal to the preset value specified in the drawing, the surface profile of the rotating part 10 to be tested is qualified; if the gap value is greater than the preset value specified in the drawing, the surface profile of the rotating part 10 to be tested is unqualified.

[0062] In one embodiment, if the gap value is less than or equal to the contour value of 0.5 mm specified in the drawing, the surface contour of the rotating part 10 to be tested is qualified; if the gap value is greater than the contour value of 0.5 mm specified in the drawing, the surface contour of the rotating part 10 to be tested is unqualified.

[0063] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A device for detecting the contour of a rotating body, characterized in that: include: A base (1) is used to place a rotating part (10) to be tested, wherein the base (1) is provided with a first circular groove, wherein the inner diameter of the first circular groove matches the outer diameter of one end of the rotating part (10); A plurality of sliding seats (3) are slidably arranged on the base (1), the sliding seats (3) are located on the outer periphery of the first circular groove, the plurality of sliding seats (3) are distributed along the circumference of the first circular groove, and the sliding seats (3) slide along the radial direction of the first circular groove; A plurality of profile templates (4) corresponding one to the sliding seat (3), the profile templates (4) being mounted on the sliding seat (3), the wall surface of the profile template (4) facing the central axis of the first circular groove matching the designed profile of the outer wall of the rotating body part (10) to be inspected; A plurality of limit pins (9) are mounted on the base (1), the limit pins (9) corresponding to the sliding seats (3) one by one, and when the sliding seats (3) are all in contact with the limit pins (9), the inner ring of the annular structure formed by the plurality of profile templates (4) matches the design size of the outer wall of the rotating body part (10) to be tested; A plurality of guide columns (6) are mounted on the base (1). When the rotating part (10) to be inspected is placed on the base (1), the guide columns (6) are located inside the rotating part (10) to be inspected. The cover plate (12) is mounted on the base (1) via the guide column (6); a second circular groove is provided on the side of the cover plate (12) facing the base (1); the inner diameter of the second circular groove matches the outer diameter of the other end of the rotating body part (10); and the first circular groove and the second circular groove are coaxial.

2. The device for detecting the curved surface profile of a rotating body according to claim 1, characterized in that: The guide column (6) comprises a coaxial connecting column (61) and a mounting column (62); one end of the connecting column (61) is connected to the base (1); the mounting column (62) is connected to the other end of the connecting column (61); a through hole (121) is provided on the cover plate (12) for the mounting column (62) to pass through; the inner diameter of the through hole (121) is smaller than the outer diameter of the connecting column (61); a clamping assembly is provided at one end of the mounting column (62) passing through the through hole (121); the clamping assembly and the mounting column (62) cooperate to clamp the cover plate (12) onto the end surface of the connecting column (61) away from the base (1).

3. The device for detecting the curved surface profile of a rotating body according to claim 2, characterized in that: The clamping assembly is a rotating pressure plate (11), one end of the rotating pressure plate (11) is rotatably connected to the cover plate (12), the other end of the rotating pressure plate (11) is provided with a matching hole, the matching hole is used to accommodate the mounting column (62), the side of the rotating pressure plate (11) is provided with a through groove for the mounting column (62) to enter the matching hole from the side of the rotating pressure plate (11), the end of the mounting column (62) away from the connecting column (61) is threadedly connected with a clamping nut (64), the rotating pressure plate (11) is rotated, the through groove approaches the mounting column (62) until the mounting column (62) is located in the matching hole, the rotating pressure plate (11) and the clamping nut (64) are abutted against the side of the cover plate (12), and the clamping nut (64) is tightened to press the cover plate (12) on the end surface of the connecting column (61) away from the base (1).

4. The device for detecting the curved surface profile of a rotating body according to claim 3, characterized in that: The number of the guide columns (6) is an even number, the inner diameter of the through hole (121) is larger than the outer diameter of the mounting column (62), one of the guide columns (6) is a positioning guide column (6), the mounting column (62) of the positioning guide column (6) is close to the outer periphery of one end of the connecting column (61) and has a positioning ring platform (63), the outer ring of the positioning ring platform (63) is circular, and the outer diameter of the positioning ring platform (63) matches the inner diameter of the through hole (121); The guide column (6) symmetrical to the positioning guide column (6) is a limiting guide column (6), and a limiting ring platform is provided on the outer periphery of one end of the mounting column (62) of the limiting guide column (6) close to the connecting column (61), and the outer ring of the limiting ring platform is a rhombus, and the two side edges of the corresponding longer diagonal line of the rhombus of the limiting ring platform abut against the inner wall of the through hole (121).

5. The device for detecting the curved surface profile of a rotating body according to claim 1, characterized in that: The base (1) is provided with a slide groove structure corresponding to the sliding seat (3) one by one, and the slide groove structure comprises a stopper (5) and a limit plate (2) arranged opposite to each other, the stopper (5) being installed on the base (1), the stopper (5) being arranged along the radial direction of the first circular groove with the side edge facing the limit plate (2), the side of the limit plate (2) away from the stopper abuts against the base (1), the side of the limit plate (2) close to the stopper is spaced from the base (1), and the side of the limit plate (2) close to the stopper (5) is arranged along the radial direction of the first circular groove. The radial direction of the shaped groove is set, the side of the limit plate (2) close to the baffle plate and the stop block (5) are spaced apart, the space between the stop block (5) and the limit plate (2) and the space between the limit plate (2) and the base (1) form an L-shaped slide groove, the sliding seat (3) includes a bottom plate located between the limit plate (2) and the base (1) and a main plate located between the stop block (5) and the limit plate (2), the profile template (4) is installed on the main plate, and the limit pin (9) is located on the side of the L-shaped slide groove close to the center of the first circular groove.

6. The device for detecting the curved surface profile of a rotating body according to claim 5, characterized in that: A locking bolt (7) is threadedly connected to the portion where the limiting plate (2) and the base (1) are spaced apart, and the locking bolt (7) passes through the limiting plate (2) to abut against the base plate.

7. The device for detecting the curved surface profile of a rotating body according to claim 1, characterized in that: The base (1) is provided with a circular guide rail located at the outer periphery of the first circular groove, the circular guide rail is provided with a slider sliding along the circular guide rail, the sliding seat (3) is mounted on the base (1) via the slider and the circular guide rail, the sliding seat (3) is slidably mounted on the slider, and the sliding direction of the sliding seat (3) is along the radial direction of the first circular groove.

8. The device for detecting the curved surface profile of a rotating body according to claim 1, characterized in that: The depths of the first circular groove and the second circular groove are 5-10 mm.

9. The device for detecting the curved surface profile of a rotating body according to claim 1, characterized in that: The cover plate (12) is a circular ring structure, and a plurality of fan-shaped through grooves are provided on the middle ring of the cover plate (12).

10. A method for detecting the contour of a rotating body surface, characterized in that: A method for detecting the curved surface profile of a rotating body is performed using the device of any one of claims 1 to 9, the method comprising the following steps: Placing a rotating body part (10) to be inspected on a base (1), and installing a cover plate (12) so that two ends of the part (10) match the first circular groove and the second circular groove; The sliding seat (3) is moved so that the sliding seat (3) abuts against the limit pin (9) and the position of the sliding seat (3) on the base (1) is fixed, and a feeler gauge is used to measure the gap between the inner side of the profile template (4) and the rotating body part (10) to be tested. If the gap value is less than or equal to the preset value specified in the drawing, the curved surface profile of the rotating body part (10) to be tested is qualified; if the gap value is greater than the preset value specified in the drawing, the curved surface profile of the rotating body part (10) to be tested is unqualified.

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