CN112697092A - Detection device and detection method for precision of inner profile of curved surface member - Google Patents
Detection device and detection method for precision of inner profile of curved surface member Download PDFInfo
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- CN112697092A CN112697092A CN202110115117.4A CN202110115117A CN112697092A CN 112697092 A CN112697092 A CN 112697092A CN 202110115117 A CN202110115117 A CN 202110115117A CN 112697092 A CN112697092 A CN 112697092A
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- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 238000006073 displacement reaction Methods 0.000 claims abstract description 62
- 230000007246 mechanism Effects 0.000 claims abstract description 58
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- 230000006698 induction Effects 0.000 claims description 23
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- 238000003825 pressing Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 13
- 238000005457 optimization Methods 0.000 description 5
- 238000009966 trimming Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
Abstract
The invention provides a device and a method for detecting the precision of an inner profile of a curved member, which comprises an axis alignment mechanism and a plurality of displacement sensors for detecting the clearance between the axis alignment mechanism and the inner profile of the curved member, wherein the axis alignment mechanism is provided with a horizontal top surface and a spherical bottom surface, the outer profile of the bottom surface is matched with the bus profile of the inner profile of the curved member, the bottom surface is attached to the inner profile of the curved member which is arranged upwards and has a vertical axis, only the horizontal top surface needs to be leveled because the inner profile of the curved member is adjusted to be arranged upwards and the axis is vertical, the axis of the bottom surface is aligned and superposed with the axis of the inner profile of the curved member, so that the aligning work is simpler and more effective, each displacement sensor is fixed on the axis alignment mechanism, and a detection part of each displacement sensor protrudes out of the bottom surface and is arranged between the bottom surface and the inner, to measure the clearance between the axis alignment mechanism and the inner profile of the curved member.
Description
Technical Field
The invention relates to the field of precision measurement, in particular to a device and a method for detecting the precision of an inner profile of a curved surface member.
Background
Large curved surface members such as end sockets of spherical crown or ellipsoidal crown structures are generally manufactured by a sheet drawing forming method, and due to the existence of springback, the difference between the precision of the molded surface after drawing forming and the actual requirement is large, the molded surface of a drawing die is often trimmed to improve the precision of the molded surface of the member. The measuring method is generally detected by a sample plate attaching method, a sample plate with the outer contour consistent with a bus of the profile surface is attached to the inner profile surface of the curved surface component, the gap of the sample plate is measured by a feeler gauge, and whether the requirement is met or not is judged according to the size of the gap. Or a laser three-dimensional scanning method is adopted to scan and measure the precision of the curved surface component, because the reference datum central axis of the axisymmetric curved surface is difficult to determine, the central axis of the curved surface generated after the curved surface obtained by partition scanning is synthesized by special software is easy to deviate from the central axis of the component, and the deviation of the curved surface generated by scanning the component and the inner theoretical molded surface is difficult to compare. In both methods, the deviation between the central axis of the molded surface at the inner side of the component and the central axis of the molded surface cannot be regulated and evaluated, so that the precision of the molded surface is difficult to accurately measure.
Patent document CN110017790A discloses a curved surface scanning trajectory generation and optimization method based on measurement accuracy, which includes firstly, establishing a mathematical model of a trajectory optimization problem, where the mathematical model of the trajectory optimization problem takes a system error in a measurement error of a laser scanner as an evaluation function, and the evaluation function can calculate a numerical value corresponding to the system error under a given robot terminal pose parameter, and convert a measurement device constraint into a penalty function. In the process of track optimization, an evaluation function and a penalty function are respectively calculated to obtain a scanning track which meets the constraint of measuring equipment and has the minimum error of a measuring system; secondly, generating a curved surface scanning initial track of the robot system, wherein the curved surface scanning initial track is represented by a series of robot terminal pose parameters; and thirdly, solving the optimal scanning track according to the track optimization problem mathematical model. But the problem that the deviation amount of the central shaft of the inner side profile of the component cannot be regulated and evaluated is not solved.
Disclosure of Invention
The invention aims to provide a detection device and a detection method for the inner profile precision of a curved surface member, which are used for solving the problems in the prior art, and the axis of the detection device is easy to adjust to be consistent with the axis of the curved surface member, so that the gap measurement value is more accurate and reliable, and accurate references are provided for trimming a die and compensating springback.
In order to achieve the purpose, the invention provides the following scheme: the utility model provides a detection apparatus of profile precision in curved surface component, is used for detecting including axle center alignment mechanism, a plurality of displacement sensor in axle center alignment mechanism and the curved surface component profile clearance, axle center alignment mechanism has horizontal top surface and is the bottom surface of sphere column structure, the outline of bottom surface and the generating line profile looks adaptation of curved surface component inner profile, just the bottom surface pastes on upwards setting and the vertical curved surface component inner profile in axle center, works as horizontal top surface leveling, the axle center of bottom surface and the axle center of curved surface component inner profile align the coincidence, each displacement sensor fixes on the axle center alignment mechanism, just displacement sensor's detection part protrusion in the bottom surface, and set up between bottom surface and the curved surface component inner profile.
Preferably, the outer side of the curved surface member is provided with a supporting device which is used for keeping the inner profile surface of the curved surface member arranged upwards and the axis of the curved surface member vertical, the supporting device is of an annular structure, the annular structure comprises an inner ring used for bearing the curved surface member body and a top surface used for supporting the outer circumferential flange of the curved surface member, and the top surface is parallel to the horizontal plane.
Preferably, axle center aligning device includes that centre frame and a plurality of are in along circumference equipartition profile riser on the centre frame, the bottom of centre frame is the curved surface structure, the bottom of profile riser be with the curved surface structure is the curved surface profile of common sphere center.
Preferably, the displacement sensors are fixed on the curved surface profile, and each displacement sensor is arranged along a normal direction of a generatrix of the curved surface profile.
Preferably, the detection part is an induction telescopic head which extends out of the curved surface profile and abuts against the inner profile of the curved surface component, and the induction telescopic head is connected to the displacement sensor body in a telescopic mode along the normal direction of the curved surface profile bus.
Preferably, the displacement sensor is electrically connected with a data acquisition mechanism for acquiring the telescopic amount of the induction telescopic head.
Preferably, the edge of the curved surface contour is in a fillet structure matched with the inner profile of the curved surface component.
Preferably, a plurality of lightening holes are formed in the profile vertical plate.
The method for detecting the precision of the inner profile of the curved surface member comprises the following steps:
s1, arranging a supporting device: placing the supporting device on a platform, and leveling the supporting device by adopting a level meter;
s2, placing a curved surface component: placing a curved surface member on the supporting device, accommodating a curved surface member body by using an inner ring of the supporting device, supporting an outer circumferential flange of the curved surface member by using the top surface of the supporting device, and aligning by using the self-weight of the curved surface member to ensure that the axis of the curved surface member is in the vertical direction;
s3, adjusting the displacement sensor: adjusting the telescopic amount of the induction telescopic heads, and adjusting the telescopic amounts of all the induction telescopic heads to be consistent;
s4, arranging an axis aligning mechanism: pressing the bottom surface of the axis aligning mechanism on the inner molded surface of the curved surface member, leveling the horizontal top surface of the axis aligning mechanism by a horizontal ruler, and adjusting the axis of the axis aligning mechanism to be consistent with the axis of the curved surface member by utilizing the self weight of the axis aligning mechanism and the curved surface fit contact characteristic;
s5, collecting data: the induction telescopic head is contacted with the inner molded surface of the curved surface member to generate displacement change, and the data acquisition mechanism acquires the displacement change to obtain a gap between the bottom surface and the inner molded surface of the curved surface member.
Preferably, in step S5, when the displacement data of the displacement sensor is unchanged, the projecting amount of the induction retractable head is increased, and steps S3-S5 are repeated.
Compared with the prior art, the invention has the following technical effects:
first, axle center alignment mechanism includes horizontal top surface and is the bottom surface of sphere column structure, and the outline of bottom surface and the generating line profile looks adaptation of profile in the curved surface component, and the bottom surface pastes and leans on the profile in the curved surface component that sets up and the axle center is vertical upwards, because the profile has been adjusted to be setting up and the axle center is vertical in the curved surface component to only need level horizontal top surface, the axle center of bottom surface and the axle center alignment coincidence of profile in the curved surface component, make the aligning work simple more effective.
The second, strutting arrangement are the loop configuration, and the loop configuration is including the inner ring that is used for bearing the weight of curved surface component body, the top surface that is used for supporting the outer circumference flange of curved surface component, and the top surface parallels with the horizontal plane, and then when leaning on the flange of curved surface component on the top surface, can keep being the interior profile of curved surface component and set up and the vertical state in axle center promptly.
Third, axle center alignment mechanism includes centre frame and a plurality of along the profile riser of circumference equipartition on the centre frame, the bottom of centre frame is the curved surface structure, the bottom of profile riser is the curved surface profile of sharing the centre of sphere with the curved surface structure, on the one hand, the bottom and the curved surface structure of profile riser share the centre of sphere, in order to guarantee whole detection device's bottom surface and curved surface component interior profile looks adaptation, on the other hand, whole detection device only comprises several profile risers and centre frame, whole detection device's dead weight has further been reduced, avoid the deflection of curved surface component too big.
Fourthly, the detection part of the displacement sensor protrudes out of the bottom surface and is arranged between the bottom surface and the inner molded surface of the curved surface member, and the molded surface precision of the member can be accurately obtained by feeding back the size of the gap between the detection device and the inner molded surface of the curved surface member through each displacement sensor.
Fifthly, the detection part is an induction telescopic head which stretches out the curved surface contour and is abutted to the inner profile of the curved surface member, the induction telescopic head is telescopically connected to the displacement inductor body along the normal direction of the curved surface contour bus, namely the induction telescopic head is in point contact with the inner profile of the curved surface member, so that the clearance measurement value is more accurate and reliable, and accurate reference is provided for trimming a die and compensating springback.
And sixthly, the edge of the curved surface outline is of a fillet structure matched with the inner profile of the curved surface member, so that the interference between the edge in the thickness direction of the profile vertical plate and the inner profile of the curved surface member is avoided, and the measurement error is large.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a front view of the overall structure of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a top view of the overall structure of the present invention;
fig. 4 is an elevation view of a profile riser of the present invention;
fig. 5 is a top view of a profile riser of the present invention;
FIG. 6 is a front view of the present invention core frame;
FIG. 7 is a side view of the present invention core frame;
FIG. 8 is a top view of the inventive core frame;
the device comprises a center frame, a 2-molded surface vertical plate, a 3-curved surface member, a 4-supporting device, a 5-displacement sensor, a 6-induction telescopic head, a 7-groove, an 8-horizontal top surface and a 9-bottom surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a detection device and a detection method for the inner profile precision of a curved surface member, which are used for solving the problems in the prior art, and the axis of the detection device is easy to adjust to be consistent with the axis of the curved surface member, so that the gap measurement value is more accurate and reliable, and accurate references are provided for trimming a die and compensating springback.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, the present embodiment provides a device for detecting the accuracy of the inner profile of a curved member 3, wherein the curved member 3 is generally regular and symmetric about the axis, the whole device includes an axis alignment mechanism, a plurality of displacement sensors 5 for detecting the gap between the axis alignment mechanism and the inner profile of the curved member 3, preferably, the displacement sensors 5 can be linear displacement sensors 5 or magnetoelastic displacement sensors 5, the axis alignment mechanism has a horizontal top surface 8 and a spherical bottom surface 9, i.e. the whole axis alignment mechanism is in a spherical crown structure, the outer profile of the bottom surface 9 is adapted to the bus profile of the inner profile of the curved member 3, the bottom surface 9 is attached to the inner profile of the curved member 3 which is disposed upward and has a vertical axis, when the horizontal top surface 8 is leveled, the axis of the bottom surface 9 is aligned to coincide with the axis of the inner profile of the curved member 3, because the axis aligning mechanism is in a spherical crown structure, the axis of the bottom surface 9 is in a vertical state when the horizontal top surface 8 is leveled, and because the curved surface structure is arranged in advance to be in a structure with an upward inner profile and a vertical axis, and meanwhile, the bottom surface 9 structure is matched with the inner profile of the curved surface member 3, the axes of the horizontal top surface 8 and the curved surface member are basically aligned and overlapped when the horizontal top surface 8 is leveled, and the situation that the accuracy of the profile is difficult to accurately measure due to the fact that the axes are not aligned is avoided. Each displacement sensor 5 is fixed on the axis aligning mechanism, a detection part of each displacement sensor 5 protrudes out of the bottom surface 9, and is arranged between the bottom surface 9 and the inner profile of the curved surface member 3 and used for measuring the gap between the bottom surface 9 and the inner profile of the curved surface member 3, and the profile precision of the member can be accurately obtained by feeding back the gap size through the displacement sensors 5.
In order to ensure that the curved surface member 3 can form a structure with an upward inner profile and a vertical axis, a supporting device 4 for keeping the upward inner profile of the curved surface member 3 and the vertical axis is arranged on the outer side of the curved surface member 3, the supporting device 4 is of an annular structure, the annular structure comprises an inner ring for bearing a curved surface member 3 body and a top surface for supporting an outer circumferential flange of the curved surface member 3, the top surface is parallel to a horizontal plane, the curved surface member 3 is of a regular axis-symmetric structure, namely, the outer circumferential flange is uniformly arranged on the outer circumferential edge of the curved surface member and is positioned on the same plane, when the outer circumferential flange of the curved surface member 3 is attached to the top surface, two planes are both in a state of being parallel to the horizontal plane, namely, the inner profile of the curved surface member 3 can be kept in a.
In order to reduce the dead weight of the axis aligning mechanism, the axis aligning mechanism comprises a center frame 1 and a plurality of profile vertical plates 2 which are uniformly distributed on the center frame 1 along the circumferential direction, the profile vertical plates 2 have certain profile width and keep rigidity, the bottom of the center frame 1 is of a curved surface structure and avoids interference with the inner profile of a curved surface component 3 during measurement, the bottom of the profile vertical plates 2 is of a curved surface profile which is concentric with the curved surface structure, the outer envelope surface of the whole axis aligning mechanism is ensured to be a theoretical spherical curved surface, preferably, in order to facilitate the installation work between the center frame 1 and the profile vertical plates 2, a plurality of grooves 7 which respectively correspond to the profile vertical plates 2 are arranged on the outer wall of the center frame 1, the profile vertical plates 2 are fixedly inserted in the corresponding grooves 7, preferably, cylindrical pins are adopted to fix the positions of profile brush plates, and are fastened on the center frame 1 through inner hexagonal bolts, as a preferred embodiment of the invention, in order to simplify the whole axis alignment mechanism and ensure that the outer envelope surface of the axis alignment mechanism is a theoretical spherical curved surface, four profile vertical plates 2 are adopted, the cross section of a preferred center frame 1 is in a cross structure, grooves 7 are respectively arranged on the top surfaces of four sides of the cross structure, the symmetrical center surfaces of the profile vertical plates 2 are mutually vertical through the center shaft of the center frame 1 and the center surface, the whole axis alignment mechanism is in a cross structure, so that the axis alignment structure and the inner profile surface of the curved surface component 3 are locally contacted in a linear contact or point contact mode, the gap measurement value is more accurate and reliable, and accurate reference is provided for trimming a mold and compensating springback.
Further, the edge of curved surface profile is the fillet structure with the interior profile adaptation of curved surface component 3, the fillet structure of preferred formation is complete fillet, can avoid producing between the thickness direction edge of profile riser 2 and the interior profile of curved surface component 3 and interfere, avoid adjusting the horizontal top surface 8 of axle center alignment mechanism promptly, when relative movement between bottom surface 9 of axle center alignment mechanism and the interior profile of curved surface component 3, the edge of curved surface profile and the interior profile direct contact of curved surface component 3, and then influence the clearance distribution between curved surface profile and the interior profile of curved surface component 3, lead to measuring error big.
For further reduction whole axle center alignment mechanism's dead weight, a plurality of lightening hole has been seted up on the profile riser 2, for example, it subtracts heavy to open triangular hole at the center of profile riser 2, and the triangular hole can stabilize whole profile riser 2's structure on the one hand, avoids its self defect such as easy deformation of taking place, and on the other hand reduces axle center alignment mechanism's dead weight, avoids axle center alignment mechanism suppression on curved surface component 3, leads to curved surface component 3's deflection too big.
In order to ensure the accurate measurement between the axis alignment mechanism and the inner profile of the curved surface member 3 by the displacement sensor 5, the displacement sensor 5 is fixed on the curved surface profile, and each displacement sensor 5 is arranged along the normal direction of the curved surface profile bus, as is known, when in measurement, the distance measured by the displacement sensor 5 is the distance in the normal direction of the axis alignment mechanism and the curved surface profile bus of the inner profile of the curved surface member 3, so that the displacement sensor 5 is arranged along the normal direction of the curved surface profile bus, namely, each displacement sensor 5 can be conveniently adjusted along the normal direction, and the distance is directly measured by the displacement sensor 5, thereby ensuring the measurement directness, accuracy and effectiveness of the gap between the axis alignment mechanism and the inner profile of the curved surface member 3.
As a preferred embodiment of the present invention, the displacement sensor 5 is a linear displacement sensor 5, the detection portion of the linear displacement sensor 5 is an induction telescopic head 6 which extends out of the curved surface contour and abuts against the inner profile of the curved surface member 3, the induction telescopic head 6 is telescopically connected to the displacement sensor body along the normal direction of the curved surface contour bus, so that the same extension amount of the telescopic head of the displacement sensor 5 can be ensured when the linear displacement sensor is installed, the telescopic head which extends out after the displacement sensor 5 contacts the inner profile of the curved surface member 3 is retracted, the displacement data variation of the displacement sensor 5 is read, the gap between the profile vertical plate 2 and the curved surface member 3 can be obtained, and the profile forming precision of the inner profile of the curved surface member. Preferably, the displacement sensor 5 is electrically connected with a data acquisition mechanism for acquiring the expansion amount of the induction expansion head 6, and the displacement data variation of the displacement sensor 5 is read by the data acquisition mechanism.
The method for detecting the precision of the inner profile of the curved surface member 3 comprises the following steps:
s1, arranging the supporting device 4: placing the supporting device 4 on a platform and leveling the platform by adopting a level gauge; the preferred end socket is a large member generally, and a large and horizontal platform structure needs to be selected;
s2, placing the curved surface member 3: placing a curved surface component 3 on a supporting device 4, accommodating a body of the curved surface component 3 by using an inner ring of the supporting device 4, supporting an outer circumferential flange of the curved surface component 3 by using the top surface of the supporting device 4, and aligning by using the self-weight of the curved surface component 3 to ensure that the axis of the curved surface component is in the vertical direction;
s3, adjusting the displacement sensor 5: adjusting the telescopic amount of the induction telescopic heads 6, and adjusting the telescopic amounts of all the induction telescopic heads 6 to be consistent;
s4, arranging an axis aligning mechanism: pressing the bottom surface 9 of the axis alignment mechanism on the inner molded surface of the curved surface component 3, leveling the horizontal top surface 8 of the axis alignment mechanism by a horizontal ruler, and adjusting the axis alignment mechanism to be consistent with the axis of the curved surface component 3 by utilizing the self weight of the axis alignment mechanism and the curved surface fit contact characteristic; preferably, when the profile vertical plate 2 is combined with the center frame 1, the center frame 1 and the profile vertical plate 2 which are assembled together are placed on the inner profile of the curved surface member 3; the upper surfaces of the vertical plates 2 of various profiles are leveled by a horizontal ruler, and the upper surfaces are basically consistent with the axes of the inner profiles of the curved surface members 3 by utilizing the self-weight and the curved surface inosculating contact characteristic;
s5, collecting data: the induction telescopic head 6 is contacted with the inner profile of the curved surface member 3 to generate displacement change, and the displacement change is collected by the data acquisition mechanism to obtain a gap between the bottom surface 9 and the inner profile of the curved surface member 3. Preferably, in step S5, when the displacement data of the displacement sensor 5 is unchanged, the projecting amount of the induction retractable head 6 is increased, and steps S3 to S5 are repeated.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The utility model provides a detection apparatus of profile precision in curved surface component, its characterized in that, be used for detecting including axle center alignment mechanism, a plurality of displacement sensor in profile clearance in axle center alignment mechanism and the curved surface component, axle center alignment mechanism has horizontal top surface and is the bottom surface of sphere column structure, the outline of bottom surface and the generating line profile looks adaptation of curved surface component inner profile, just the bottom surface pastes on upwards setting and the vertical curved surface component inner profile in axle center, works as horizontal top surface leveling, the axle center of bottom surface and the coincidence of the axle center alignment of curved surface component inner profile, each displacement sensor fix on the axle center alignment mechanism, just displacement sensor's measuring part protrusion in the bottom surface, and set up between bottom surface and the curved surface component inner profile.
2. The apparatus for detecting the accuracy of the inner profile of a curved surface member as claimed in claim 1, wherein the outer side of the curved surface member is provided with a supporting means for keeping the inner profile of the curved surface member facing upward and the axis thereof vertical, the supporting means is in a ring structure, the ring structure comprises an inner ring for bearing the body of the curved surface member and a top surface for supporting the outer circumferential flange of the curved surface member, and the top surface is parallel to the horizontal plane.
3. The apparatus according to claim 2, wherein the axis aligning mechanism comprises a center frame and a plurality of vertical plates uniformly distributed along a circumferential direction on the center frame, the bottom of the center frame is of a curved surface structure, and the bottom of each vertical plate is of a curved surface contour concentric with the curved surface structure.
4. The apparatus for detecting the accuracy of a profile in a curved surface member according to claim 3, wherein said displacement sensors are fixed to said curved surface profile, and each of said displacement sensors is arranged in a direction normal to a generatrix of said curved surface profile.
5. The apparatus according to claim 4, wherein the detecting portion is an induction telescopic head extending out of the curved surface contour and abutting against the inner profile of the curved surface member, and the induction telescopic head is telescopically connected to the displacement sensor body along a normal direction of a generatrix of the curved surface contour.
6. The apparatus for detecting the accuracy of the inner profile of a curved surface member according to claim 5, wherein the displacement sensor is electrically connected to a data acquisition mechanism for acquiring the amount of expansion of the inductive expansion head.
7. The device for detecting the accuracy of the inner profile of the curved surface member as claimed in claim 4 or 6, wherein the edge of the curved surface contour is in a rounded structure matched with the inner profile of the curved surface member.
8. The apparatus for detecting the accuracy of a profile in a curved surface member as claimed in claim 7, wherein said profile riser has a plurality of lightening holes formed therein.
9. A method for detecting the accuracy of the inner profile of a curved surface member using the apparatus for detecting the accuracy of the inner profile of a curved surface member according to any one of claims 6 to 8, comprising the steps of:
s1, arranging a supporting device: placing the supporting device on a platform, and leveling the supporting device by adopting a level meter;
s2, placing a curved surface component: placing a curved surface member on the supporting device, accommodating a curved surface member body by using an inner ring of the supporting device, supporting an outer circumferential flange of the curved surface member by using the top surface of the supporting device, and aligning by using the self-weight of the curved surface member to ensure that the axis of the curved surface member is in the vertical direction;
s3, adjusting the displacement sensor: adjusting the telescopic amount of the induction telescopic heads, and adjusting the telescopic amounts of all the induction telescopic heads to be consistent;
s4, arranging an axis aligning mechanism: pressing the bottom surface of the axis aligning mechanism on the inner molded surface of the curved surface member, leveling the horizontal top surface of the axis aligning mechanism by a horizontal ruler, and adjusting the axis of the axis aligning mechanism to be consistent with the axis of the curved surface member by utilizing the self weight of the axis aligning mechanism and the curved surface fit contact characteristic;
s5, collecting data: the induction telescopic head is contacted with the inner molded surface of the curved surface member to generate displacement change, and the data acquisition mechanism acquires the displacement change to obtain a gap between the bottom surface and the inner molded surface of the curved surface member.
10. The method of claim 9, wherein in step S5, when the displacement data of the displacement sensor is unchanged, the protrusion amount of the telescopic induction head is increased, and steps S3-S5 are repeated.
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