A screw-type positioning and rotating mechanism for annular thin plates and a method of using the same

Abstract

The present invention discloses a screw-type positioning and rotating mechanism for an annular thin plate and a method for using the same, comprising a positioning mechanism and a rotating mechanism that are fixedly connected and form a synchronously rotating whole. The present invention can realize the rapid clamping and positioning of the annular thin plate. The clamping part is the center hole part of the annular thin plate with greater strength, which can avoid secondary deformation of the annular thin plate during the detection and positioning process, and at the same time ensure the accurate detection of the shape and position tolerance parameters of the annular thin plate; the rotation accuracy of the rotating mechanism reaches 0.003mm, and the accuracy error is within ±0.001mm at different speeds, which minimizes the system error of the transmission system; the integrated design of the rotating shaft system and the workpiece positioning platform is realized, which avoids the occurrence of matching errors between the transmission mechanism and the positioning mechanism; the present invention has significant advantages such as small friction torque, large load, and high reliability, which can effectively avoid the system error caused by the low rotation accuracy of the rotating shaft system, and meet the sampling needs of the rapid detection of annular thin plates.

Description

Technical Field

[0001] The present invention relates to the technical field of precision detection of mechanical products, and in particular to a screw-type positioning and rotating mechanism for an annular thin plate and a method of using the same. Background Art

[0002] Annular plates are thin-walled metal parts that require numerous axial and radial inspections, including critical geometric dimensions and form and position tolerances such as diameter, roundness, and wall thickness uniformity. While typically precision-tested using a three-dimensional coordinate measuring machine (CMM), this method offers high measurement accuracy but suffers from low efficiency and requires high technical expertise, making it unsuitable for batch testing. Therefore, it is imperative to develop online inspection methods suitable for batch manufacturing, requiring specialized testing equipment capable of rapid and precise measurement. This equipment should be able to simultaneously test numerous parameters of annular plates, thereby improving inspection efficiency. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a screw-type positioning and rotation mechanism for detecting important geometric dimensions and form and position tolerances of annular thin plates. This mechanism can not only realize accurate measurement and positioning of the annular thin plates, but also drive their precise rotation, thereby completing accurate measurement points, and further realizing rapid and accurate measurement of the annular thin plates, improving detection efficiency, and adapting to the requirements of batch detection.

[0004] Another object of the present invention is to provide a screw-type positioning and rotating mechanism for an annular thin plate and a method of using the same.

[0005] Another object of the present invention is a detection device with a screw-type positioning and rotating mechanism.

[0006] The present invention is achieved through the following technical solutions:

[0007] A screw-type positioning and rotating mechanism for an annular thin plate, comprising a positioning mechanism and a rotating mechanism that are fixedly connected and form a synchronously rotating whole;

[0008] The positioning mechanism includes a positioning platform and a clamping cap. The positioning platform is a stepped shaft structure, which includes a first shaft segment, a second shaft segment, a third shaft segment and a fourth shaft segment from top to bottom. The shaft diameters of the first shaft segment, the second shaft segment, the third shaft segment and the fourth shaft segment increase in sequence. The top end of the first shaft segment is provided with an external thread for connecting with the clamping cap. The shaft diameter of the second shaft segment is matched according to the center hole of the annular thin plate and the two are clearance-matched. The shaft diameter of the third shaft segment is larger than the diameter of the center hole of the annular thin plate, and is used to achieve axial limitation of the annular thin plate.

[0009] The swivel mechanism includes a main shaft fixedly connected to the bottom end of the positioning platform and capable of axial rotation, and a sleeve sleeved outside the main shaft. The sleeve is coaxially arranged with the main shaft and forms relative rotation with the main shaft. In the above technical solution, the swivel mechanism also includes an upper thrust cap, a lower thrust cap, and a nut. The upper thrust cap is fixedly connected to the top end of the main shaft, and the bottom surface of the upper thrust cap and the top surface of the sleeve are relatively rotatable. The lower thrust cap sleeves outside the main shaft, and the top surface of the lower thrust cap and the bottom surface of the sleeve are relatively rotatable. The nut is threadedly connected to the bottom end of the main shaft.

[0010] In the above technical solution, the upper thrust cover and the positioning platform are made in one piece or fixedly connected by screws.

[0011] In the above technical solution, both ends of the sleeve are provided with the same annular ridges, and a ball rack is provided between the main shaft and the sleeve. The ball rack has the same shape as the sleeve, and balls that can roll freely in the ball rack are embedded in the ball rack. The balls are evenly distributed between the upper thrust cover and the sleeve, between the sleeve and the lower thrust cover, and between the sleeve and the main shaft to realize the shaft system rotation of the main shaft.

[0012] In the above technical solution, the balls located between the bushing and the main shaft are arranged in a spiral shape.

[0013] In the above technical solution, the fourth shaft segment is provided with 3-6 axial through holes evenly distributed in a circular array near the outer edge.

[0014] In the above technical solution, the front section of the inner hole of the clamping cap is a smooth hole, and the rear section is a high-precision threaded hole. The aperture of the smooth hole is larger than the shaft diameter of the second shaft segment and smaller than the shaft diameter of the third shaft segment. The aperture of the high-precision threaded hole is equal to the shaft diameter of the first shaft segment.

[0015] In the above technical solution, the top end surface of the main shaft is provided with axial threaded holes arranged in a circumferential array for screwing in screws to achieve connection with the upper thrust cover.

[0016] In the above technical solution, the upper thrust cover is provided with axial through holes arranged in a circumferential array near the center for connecting with the main shaft, and the upper thrust cover is provided with axial threaded through holes arranged in a circumferential array near the edge for connecting with the positioning platform.

[0017] In the above technical solution, a gasket is provided on the top of the positioning platform. The gasket is located under the clamping cap and can be clamped and fixed by the clamping cap.

[0018] In the above technical solution, a disc spring is sleeved on the bottom of the main shaft close to the bottom surface of the lower thrust cover, and a recess matching the disc spring is formed upward on the bottom surface of the lower thrust cover.

[0019] In the above technical solution, a washer is provided on the portion of the main shaft located between the nut and the disc spring.

[0020] The present invention provides a screw-type positioning and rotation mechanism for annular thin plates, which is the main structure of annular thin plate rapid special detection equipment. The mechanism is connected to the frame of the equipment through the shaft sleeve, and the main shaft is connected to the drive motor through a pulley to realize the rotation of the mechanism. The specific use process is: the annular thin plate is installed on the positioning table with the center hole as the reference through a clearance fit, and after the gasket is put on, the clamping cap is put on and tightened to complete the positioning of the annular thin plate; start the motor, drive the main shaft to rotate, drive the annular thin plate to rotate synchronously, and collect points through the sensor. The measurement is completed after the annular thin plate rotates one circle.

[0021] A detection device with a screw-type positioning and rotation mechanism includes a frame, a drive mechanism, a measuring mechanism, the screw-type positioning and rotation mechanism, a control system and a measurement and analysis system. The screw-type positioning and rotation mechanism is fixed to the frame, the drive mechanism drives the screw-type positioning and rotation mechanism to rotate, the measuring mechanism is used to collect coordinate signals at different positions on an annular thin plate, and the measurement and analysis system calculates and displays measurement results based on the signals collected by the measuring mechanism and performs data statistical analysis.

[0022] The advantages and beneficial effects of the present invention are:

[0023] (1) The screw-type positioning and rotating mechanism for annular thin plates of the present invention can realize the rapid clamping and positioning of the annular thin plates. The clamping part is the center hole part of the annular thin plates with greater strength, which can avoid secondary deformation of the annular thin plates during the detection and positioning process, and at the same time ensure the accurate detection of the shape and position tolerance parameters of the annular thin plates.

[0024] (2) The rotation accuracy of the rotary mechanism of the present invention reaches 0.003 mm. At different rotation speeds, the accuracy error is within ±0.001 mm, which minimizes the system error of the transmission system.

[0025] (3) The screw-type positioning and rotating mechanism for annular thin plates of the present invention realizes an integrated design of the rotating shaft system and the workpiece positioning platform, thereby avoiding the occurrence of matching errors between the transmission mechanism and the positioning mechanism.

[0026] (4) The screw-type positioning and rotating mechanism for annular thin plates of the present invention also has significant advantages such as small friction torque, large load, and high reliability. It can effectively avoid system errors caused by low rotation accuracy of the rotating shaft system and meet the sampling needs of rapid detection of annular thin plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a partial cross-sectional view of a screw-type positioning and rotating mechanism for an annular thin plate according to the present invention.

[0028] in:

[0029] 1: Upper thrust cover, 2: Ball cage, 3: Ball, 4: Lower thrust cover, 5: Disc spring, 6: Washer, 7: Nut, 8: Spindle, 9: Bushing, 10: Positioning table, 10-1: First shaft section, 10-2: Second shaft section, 10-3: Third shaft section, 10-4: Fourth shaft section, 11: Gasket, 12: Clamping cap.

[0030] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the following embodiments are illustrative rather than restrictive, and the scope of protection of the present invention cannot be limited by the following embodiments.

[0032] Example 1

[0033] A screw-type positioning and rotating mechanism for an annular thin plate comprises a positioning mechanism and a rotating mechanism. The positioning mechanism and the rotating mechanism form a whole that can rotate synchronously and rotate under the drive of a driving motor, thereby realizing rotation detection of the annular thin plate.

[0034] The positioning mechanism includes a positioning platform 10 and a clamping cap 12. The diameter of the top of the positioning platform 10 is made according to the center hole of the annular thin plate and is processed with threads, which are threadedly connected with the clamping cap 12 to tighten the annular thin plate.

[0035] The rotary mechanism is a precision rotary shaft system with a rotation accuracy of up to 0.001mm, including an upper thrust cover 1, a main shaft 8, a sleeve 9, a lower thrust cover 4 and a nut 7; the upper thrust cover 1 is a rotating part, which can realize the axial positioning of the entire shaft system and serve as a connecting part connecting the positioning mechanism and the rotary mechanism; the main shaft 8 is the main rotating part, which is used as a transmission part. The bottom end is processed with an external thread for screwing the nut 7 to realize the overall assembly of the rotary mechanism. When in use, the main shaft 8 is connected to the drive motor through a pulley to realize the rotation of the mechanism; the positioning platform 10, the upper thrust cover 1 and the main shaft 8 are made as one piece, and the shaft The sleeve 9 is a stationary part, which is sleeved outside the main shaft 8 and coaxially arranged with the main shaft 8. When in use, it is connected to the frame of the detection equipment to fix the entire mechanism; the lower thrust cover 4 is sleeved outside the main shaft 8 and forms an interference fit between the main shaft 8, which is used to support the entire rotary mechanism. The bottom surface of the upper thrust cover 1 and the top surface of the shaft sleeve 9, and the top surface of the lower thrust cover 4 and the bottom surface of the shaft sleeve 9 can rotate relative to each other; the nut 7 is connected to the bottom end of the main shaft 8, and is used to apply a preload to the upper thrust cover 1, the lower thrust cover 4 and the shaft sleeve 9 in the axial direction, so that the rotating part of the rotary mechanism fits tightly, thereby ensuring the rotation accuracy.

[0036] When in use, the present invention is connected to the frame of the detection equipment through the shaft sleeve 9, and the main shaft 8 is connected to the driving motor through the pulley. The annular thin plate is fixed on the positioning table 10 with the center hole as the reference through clearance fit, and the clamping cap 12 is put on and tightened to complete the positioning of the annular thin plate; the motor is started to drive the main shaft 8 to rotate, the annular thin plate rotates synchronously, the sensor starts to collect points, and the measurement is completed after one rotation.

[0037] Example 2

[0038] A screw-type positioning and rotating mechanism for an annular thin plate comprises a positioning mechanism and a rotating mechanism. The positioning mechanism and the rotating mechanism are fixedly connected to form a whole that can rotate synchronously. The positioning mechanism rotates under the drive of a driving motor, thereby realizing rotation detection of the annular thin plate.

[0039] The positioning mechanism includes a positioning platform 10 and a clamping cap 12. The positioning platform 10 is a stepped shaft structure, which is composed of a first shaft section 10-1, a second shaft section 10-2, a third shaft section 10-3 and a fourth shaft section 10-4 from top to bottom. The shaft diameters of the first shaft section 10-1, the second shaft section 10-2, the third shaft section 10-3 and the fourth shaft section 10-4 increase in sequence. The top of the first shaft section 10-1 is provided with an external thread for connecting with the clamping cap 12, which is used to thread the clamping cap 12 to fasten the annular thin plate; the shaft diameter of the second shaft section 10-2 is made according to the center hole of the annular thin plate and the two are clearance-matched. The third shaft section 10 -3 has an axial diameter that is 15mm larger than the diameter of the center hole of the annular thin plate, and is used to achieve axial limitation of the annular thin plate. The fourth shaft segment 10-4 is provided with 4 axial through holes evenly distributed in a circular array near the outer edge for passing screws. The front section of the inner hole of the clamping cap 12 is processed into a light hole, and the aperture of the light hole is larger than the axial diameter of the second shaft segment 10-2 and smaller than the axial diameter of the third shaft segment 10-3, so as to meet the measurement and positioning needs of annular thin plates of different thicknesses. The rear section is processed into a high-precision threaded hole, and the aperture of the high-precision threaded hole is equal to the axial diameter of the first shaft segment 10-1, and is used to cooperate with the external thread on the positioning platform 10 to fasten the annular thin plate.

[0040] The rotating mechanism is a precision rotating shaft system with a rotation accuracy of up to 0.001mm, including an upper thrust cover 1, a main shaft 8, a sleeve 9, a lower thrust cover 4 and a nut 7; the upper thrust cover 1 is a rotating part, which can realize the axial positioning of the entire shaft system, and the upper thrust cover 1 is provided with axial through holes arranged in a circumferential array near the center for connecting with the main shaft 8, and the upper thrust cover 1 is provided with axial threaded through holes arranged in a circumferential array near the edge for connecting with the positioning platform 10, the top end of which is connected to the positioning platform 10 of the positioning mechanism, and the bottom end is connected to the top end of the main shaft 8, serving as a connecting part connecting the positioning mechanism and the rotating mechanism; the main shaft 8 is the main rotating part, and as a transmission part, its top end is provided with axial threaded holes arranged in a circumferential array for screwing in screws to achieve connection with the upper thrust cover 1 The bottom end is processed with an external thread for screwing the nut 7 to realize the overall assembly of the rotary mechanism. When in use, the main shaft 8 is connected to the drive motor through a pulley to realize the rotation of the mechanism; the shaft sleeve 9 is a stationary part, which is sleeved outside the main shaft 8 and coaxially arranged with the main shaft 8. When in use, it is connected to the frame of the detection equipment to fix the entire mechanism; the lower thrust cover 4 is sleeved outside the main shaft 8 and forms an interference fit between the main shaft 8 for supporting the entire rotary mechanism. The bottom surface of the upper thrust cover 1 and the top surface of the shaft sleeve 9, and the top surface of the lower thrust cover 4 and the bottom surface of the shaft sleeve 9 can all rotate relative to each other; the nut 7 is connected to the bottom end of the main shaft 8 for applying a preload to the upper thrust cover 1, the lower thrust cover 4 and the shaft sleeve 9 in the axial direction, so that the rotating part of the rotary mechanism fits tightly, thereby ensuring the rotation accuracy.

[0041] When in use, the present invention is connected to the frame of the detection equipment through the shaft sleeve 9, and the main shaft 8 is connected to the driving motor through the pulley. The annular thin plate is fixed on the positioning table 10 with the center hole as the reference through clearance fit, and the gasket 11 and the clamping cap 12 are put on and tightened to complete the positioning of the annular thin plate; the motor is started to drive the main shaft 8 to rotate, the annular thin plate rotates synchronously, the sensor starts to collect points, and the measurement is completed after one rotation.

[0042] Example 3

[0043] A screw-type positioning and rotating mechanism for an annular thin plate comprises a positioning mechanism and a rotating mechanism. The positioning mechanism and the rotating mechanism are fixedly connected to form a whole that can rotate synchronously. The positioning mechanism rotates under the drive of a driving motor, thereby realizing rotation detection of the annular thin plate.

[0044] The positioning mechanism includes a positioning platform 10, a gasket 11 and a clamping cap 12. The positioning platform 10 is a stepped shaft structure, which is composed of a first shaft section 10-1, a second shaft section 10-2, a third shaft section 10-3 and a fourth shaft section 10-4 from top to bottom. The shaft diameters of the first shaft section 10-1, the second shaft section 10-2, the third shaft section 10-3 and the fourth shaft section 10-4 increase in sequence. The top of the first shaft section 10-1 is provided with an external thread for connecting with the clamping cap 12, which is used to thread and fasten the annular thin plate with the clamping cap 12; the shaft diameter of the second shaft section 10-2 is made according to the center hole of the annular thin plate and the two are clearance-matched; the shaft diameter of the third shaft section 10-3 is larger than the diameter of the center hole of the annular thin plate by 15 mm, which is used to realize axial limitation of the annular thin plate. The four-axis segment 10-4 is provided with four axial through holes evenly distributed in a circular array near the outer edge for passing screws; the gasket 11 is located under the clamping cap 12 and can be clamped and fixed by the clamping cap 12. A through hole is processed in the center of the gasket 11, and the diameter of the through hole is 0.1mm larger than the diameter of the center hole of the annular thin plate, which is used to transmit the clamping force to avoid scratching the annular thin plate during the clamping process; the front section of the inner hole of the clamping cap 12 is processed into a light hole, and the aperture of the light hole is larger than the axial diameter of the second axis segment 10-2 and smaller than the axial diameter of the third axis segment 10-3, which meets the measurement and positioning needs of annular thin plates of different thicknesses, and the rear section is processed into a high-precision threaded hole, and the aperture of the high-precision threaded hole is equal to the axial diameter of the first axis segment 10-1, which is used to cooperate with the external thread on the positioning platform 10 to fasten the annular thin plate.

[0045] The present invention can realize the rapid clamping and positioning of the annular thin plate. The pressing part is the center hole part of the annular thin plate with greater strength, which can avoid secondary deformation of the annular thin plate during the detection and positioning process, and at the same time ensure the accurate detection of the shape and position tolerance parameters of the annular thin plate.

[0046] The rotary mechanism is a precision rotary shaft system with a rotation accuracy of up to 0.001 mm, comprising an upper thrust cover 1, a main shaft 8, a sleeve 9, a ball carrier 2, balls 3, a lower thrust cover 4, a disc spring 5, a washer 6 and a nut 7;

[0047] The upper thrust cover 1 is a rotating part that can realize the axial positioning of the entire shaft system. The upper thrust cover 1 is provided with axial through holes arranged in a circumferential array near the center for connecting with the main shaft 8. The upper thrust cover 1 is provided with axial threaded through holes arranged in a circumferential array near the edge for connecting with the positioning platform 10. The top end is connected to the positioning platform 10 of the positioning mechanism, and the bottom end is connected to the top end of the main shaft 8, serving as a connecting part connecting the positioning mechanism and the rotary mechanism.

[0048] The main shaft 8 is the main rotating part and serves as a transmission part. Its top end is provided with axial threaded holes arranged in a circular array for screwing in screws to achieve connection with the upper thrust cover 1. The bottom end is processed with external threads for screwing in the nut 7 to achieve the overall assembly of the rotating mechanism. When in use, the main shaft 8 is connected to the drive motor through a pulley to achieve rotation of the mechanism.

[0049] The shaft sleeve 9 is a stationary part, which is sleeved outside the main shaft 8 and coaxially arranged with the main shaft 8. The same annular convex edges are provided at both ends of the shaft sleeve 9. When in use, it is connected to the frame of the detection equipment to fix the entire mechanism.

[0050] The ball rack 2 is arranged between the main shaft 8 and the sleeve 9, and is a clamping and limiting mechanism for the ball 3. Its shape is the same as that of the sleeve 9. A through hole for placing the ball 3 is processed on the ball rack 2, and the ball 3 can roll freely in the through hole, ensuring that the ball 3 is arranged in a certain order and does not shift during the rotation process, thereby ensuring the rotation accuracy; the ball 3 is a standard zero-grade steel ball, which is coated with lubricating oil on the outer surface and placed in the corresponding through hole of the ball rack 2, and is evenly distributed between the upper thrust cover 1 and the sleeve 9, between the sleeve 9 and the lower thrust cover 4, and between the sleeve 9 and the main shaft 8. A dense ball shaft system is arranged in the axial and radial directions of the main shaft 8. The dense arrangement of the balls 3 helps to reduce The influence of various errors on the position of the rotation center is reduced, the effective contact surface is increased, and the averaging effect is played, which is beneficial to improving the rotation accuracy of the shaft system; the dense balls 3 are arranged in an approximately spiral arrangement, so that each ball 3 rolls on each other according to its own raceway without repeating during operation, reducing repeated wear and maintaining the rotation accuracy of the shaft system for a long time; the main shaft 8, the sleeve 9 and the ball 3 are assembled with interference fit. This assembly method can cause the main shaft 8, the sleeve 9 and the ball 3 to produce elastic deformation, reducing the influence of the dimensional error and geometric shape error of the parts such as the main shaft 8, the sleeve 9 and the ball 3, which can not only improve the stability and rotation accuracy of the shaft system, but also increase the rigidity of the shaft system.

[0051] The lower thrust cover 4 is sleeved outside the main shaft 8 and forms an interference fit with the main shaft 8, which is used to support the entire rotary mechanism. The bottom surface of the upper thrust cover 1 and the top surface of the shaft sleeve 9, as well as the top surface of the lower thrust cover 4 and the bottom surface of the shaft sleeve 9 can rotate relative to each other.

[0052] A disc spring 5 is sleeved on the bottom of the main shaft 8 close to the bottom surface of the lower thrust cover 4. The bottom surface of the lower thrust cover 4 is upwardly formed with a depression matching the disc spring 5. The disc spring 5 is used to reduce the influence of the mutual position error between the main shaft 8, the sleeve 9, the upper thrust cover 1 and the lower thrust cover 4, thereby improving the axial rotation accuracy and axial rigidity of the shaft system.

[0053] A washer 6 is sleeved on the portion of the main shaft 8 between the nut 7 and the disc spring 5 , and the washer 6 is used to transmit a preload.

[0054] The nut 7 is connected to the bottom end of the main shaft 8 and is used to apply preload to the upper thrust cover 1, the lower thrust cover 4 and the sleeve 9 in the axial direction so that the rotating part of the rotary mechanism fits tightly, thereby ensuring the rotation accuracy.

[0055] The rotation accuracy of the rotary mechanism reaches 0.003mm, and the accuracy error is within ±0.001mm at different speeds, minimizing the system error of the transmission system.

[0056] When in use, the present invention is connected to the frame of the detection equipment through the shaft sleeve 9, and the main shaft 8 is connected to the driving motor through the pulley. The annular thin plate is fixed on the positioning table 10 with the center hole as the reference through clearance fit, and the gasket 11 and the clamping cap 12 are put on and tightened to complete the positioning of the annular thin plate; the motor is started to drive the main shaft 8 to rotate, the annular thin plate rotates synchronously, the sensor starts to collect points, and the measurement is completed after one rotation.

[0057] Example 4

[0058] A detection device with a screw-type positioning and rotation mechanism, characterized in that it includes: a frame, a driving mechanism, a measuring mechanism, the screw-type positioning and rotation mechanism as described in Example 3, a control system, and a measurement and analysis system. The screw-type positioning and rotation mechanism is connected to the frame of the device through the shaft sleeve 9, and the driving mechanism is connected to the main shaft 8 through a pulley to drive the screw-type positioning and rotation mechanism to rotate. The measuring mechanism is provided with a sensor, which collects data points at the measured position of the workpiece (annular thin plate). More than 500 points can be collected during one rotation, thereby effectively reducing the standard deviation of the measurement result and improving the measurement accuracy. The sensor is designed with a matching A / D converter The conversion and amplification circuit can directly output digital signals. At the same time, the circuit has a gain adjustment function, which is convenient for adjusting the linearity of the sensor. The control system is used to realize the control of various electrical components (solenoid valves, relays, motors, etc.), and then control the mechanical actions of the tightening positioning and rotation mechanism, drive mechanism and measuring mechanism to complete the rotation measurement; the measurement and analysis system is used to realize the measurement function of the device, human-computer interaction, data display, storage and analysis. Its unique sensor signal conditioning function and measurement result compensation function meet the accuracy optimization requirements under the relative measurement method; at the same time, it has the sampling point control setting function and the rotation circle number adjustment function for rotation measurement, which effectively improves the measurement accuracy.

[0059] The measurement process of a detection device with a screw-type positioning and rotation mechanism of the present invention is as follows: starting the control system and the measuring system, placing the standard parts used for zero position adjustment and value traceability of the sensor on the screw-type positioning and rotation mechanism, removing the standard parts after setting the zero position of the sensor, placing the workpiece (annular thin plate), starting the measurement and analysis system, the workpiece rotating, the sensor collecting signals, and the program automatically stopping after the rotation time set by the program is reached. The measurement and analysis system calculates and displays the measurement results based on the signals collected by the sensor and performs data statistical analysis.

[0060] The standard part adopts a local profiling structure design, which meets the calibration function while improving the rigidity of the standard part, making it less likely to deform and ensuring the stability of the measured value.

[0061] The present invention realizes the integrated design of the rotary shaft system and the workpiece positioning platform 10, avoiding the occurrence of matching errors between the transmission mechanism and the positioning mechanism. At the same time, it also has significant advantages such as small friction torque, large load, and high reliability. It can effectively avoid the occurrence of system errors caused by the low rotation accuracy of the rotary shaft system, and can meet the sampling needs of rapid detection of annular thin plates.

[0062] For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" are used in the embodiments to describe the relationship of one element or feature relative to another element or feature shown in the figures. It should be understood that, in addition to the orientation shown in the figures, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, an element described as being "below" another element or feature will be positioned "above" the other element or feature. Therefore, the exemplary term "below" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here should be interpreted accordingly.

[0063] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0064] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A screw-type positioning and rotating mechanism for an annular thin plate, characterized in that: It includes a positioning mechanism and a rotating mechanism that are fixedly connected and form a synchronous rotating whole; The positioning mechanism includes a positioning platform and a clamping cap. The positioning platform is a stepped shaft structure, which includes a first shaft segment, a second shaft segment, a third shaft segment and a fourth shaft segment from top to bottom. The shaft diameters of the first shaft segment, the second shaft segment, the third shaft segment and the fourth shaft segment increase in sequence. The top end of the first shaft segment is provided with an external thread for connecting with the clamping cap. The shaft diameter of the second shaft segment is matched according to the center hole of the annular thin plate and the two are clearance-matched. The shaft diameter of the third shaft segment is larger than the diameter of the center hole of the annular thin plate, and is used to achieve axial limitation of the annular thin plate. The rotary mechanism includes a main shaft fixedly connected to the bottom end of the positioning platform and capable of rotating in the axial direction, and a sleeve sleeved outside the main shaft, wherein the sleeve is coaxially arranged with the main shaft and forms relative rotation with the main shaft; The rotary mechanism also includes an upper thrust cover, a lower thrust cover and a nut. The upper thrust cover is fixedly connected to the top end of the main shaft, and the bottom surface of the upper thrust cover and the top surface of the shaft sleeve can rotate relative to each other. The lower thrust cover is sleeved outside the main shaft and the top surface of the lower thrust cover and the bottom surface of the shaft sleeve can rotate relative to each other. The nut is connected to the bottom end of the main shaft by a threaded connection.

2. The screw-type positioning and rotating mechanism according to claim 1, characterized in that: The upper thrust cover is integrally formed with the positioning platform or fixedly connected with the positioning platform by screws.

3. The screw-type positioning and rotating mechanism according to claim 1, characterized in that: Both ends of the sleeve are provided with the same annular ridges, and a ball rack is provided between the main shaft and the sleeve. The ball rack has the same shape as the sleeve, and balls that can roll freely in the ball rack are embedded in the ball rack. The balls are distributed between the upper thrust cover and the sleeve, between the sleeve and the lower thrust cover, and between the sleeve and the main shaft to realize the shaft system rotation of the main shaft.

4. The screw-type positioning and rotating mechanism according to claim 3, characterized in that: The balls located between the shaft sleeve and the main shaft are arranged in a spiral shape.

5. The screw-type positioning and rotating mechanism according to claim 1, characterized in that: The fourth shaft segment is provided with 3-6 axial through holes evenly distributed in a circumferential array near the outer edge.

6. The screw-type positioning and rotating mechanism according to claim 1, characterized in that: The front section of the inner hole of the clamping cap is a smooth hole, and the rear section is a high-precision threaded hole. The aperture of the smooth hole is larger than the diameter of the second shaft segment and smaller than the diameter of the third shaft segment. The aperture of the high-precision threaded hole is equal to the diameter of the first shaft segment.

7. The screw-type positioning and rotating mechanism according to claim 1, characterized in that: The top end surface of the main shaft is provided with axial threaded holes arranged in a circumferential array.

8. The screw-type positioning and rotating mechanism according to claim 1, characterized in that: The upper thrust cover is provided with axial through holes arranged in a circumferential array near the center for connecting with the main shaft, and the upper thrust cover is provided with axial threaded through holes arranged in a circumferential array near the edge for connecting with the positioning platform.

9. The screw-type positioning and rotating mechanism according to claim 1, characterized in that: A gasket is sleeved on the top of the positioning platform. The gasket is located under the pressing cap and can be pressed and fixed by the pressing cap.

10. The screw-type positioning and rotating mechanism according to claim 1, characterized in that: A disc spring is sleeved on the bottom of the main shaft close to the bottom surface of the lower thrust cover, and a recess matching the disc spring is formed upward on the bottom surface of the lower thrust cover.

11. The method for using the screw-type positioning and rotating mechanism according to any one of claims 1 to 10, characterized in that: The mechanism is connected to the frame of the detection equipment through the shaft sleeve, and the main shaft is connected to the driving motor through a pulley to realize the rotation of the mechanism; the specific use process is: the annular thin plate is installed on the positioning table with the center hole as the reference through clearance fit, the clamping cap is put on and tightened to complete the positioning of the annular thin plate; the motor is started to drive the main shaft to rotate, driving the annular thin plate to rotate synchronously, and points are collected through the sensor, and the measurement is completed after the annular thin plate rotates one circle.

12. A detection device with a screw-type positioning and rotating mechanism, characterized in that: It includes a frame, a driving mechanism, a measuring mechanism, a screw-type positioning and rotating mechanism as described in any one of claims 1 to 10, a control system, and a measuring and analysis system. The screw-type positioning and rotating mechanism is fixed on the frame, the driving mechanism drives the screw-type positioning and rotating mechanism to rotate, the measuring mechanism is used to collect coordinate signals at different positions on the annular thin plate, and the measuring and analysis system calculates and displays the measurement results and performs data statistical analysis based on the signals collected by the measuring mechanism.

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