A device for detecting wall thickness and wall thickness difference of double cone

Abstract

The present invention discloses a device for detecting the wall thickness and wall thickness difference of a double cone, comprising a workbench, a computer, a double cone positioning seat, a large cone measuring assembly and a small cone measuring assembly; the double cone positioning seat, the large cone measuring assembly and the small cone measuring assembly are installed on the workbench, the double cone positioning seat clamps the double cone workpiece and enables the double cone workpiece to rotate; the large cone measuring assembly and the small cone measuring assembly are arranged close to the large end of the double cone workpiece; the large cone measuring assembly and the small cone measuring assembly can respectively detect the wall thickness of the large cone part and the small cone part of the double cone workpiece. The present invention can automatically detect the wall thickness of the double cone, automatically read data, automatically analyze, process and evaluate, automatically save and output, reduce the influence of human factors on the measuring structure, greatly improve the measurement accuracy, and have a high degree of automation, simplify the detection process, and improve the detection work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of double-cone wall thickness and wall thickness difference detection, and in particular relates to a double-cone wall thickness and wall thickness difference detection device. Background Art

[0002] At present, the wall thickness and wall thickness difference of double-cone workpieces are mostly detected by manual metering and mechanical special manual measuring devices. The measurement is carried out by manually reading and recording the measurement data, and manually calculating, analyzing and evaluating the wall thickness and wall thickness difference. This manual measuring device has a large gap in the moving track, poor uniformity in the manual push measurement process, large human errors in the measurement method, poor repeatability, and the original records of the test results are all filled in manually, which has low work efficiency and is difficult to meet the requirements of double-cone wall thickness and wall thickness difference detection. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a detection device for the wall thickness and wall thickness difference of a double cone with simple structure, convenient operation, high measurement efficiency and high measurement accuracy. It has a high degree of measurement automation and can reduce the labor intensity of workers and the influence of human factors on the measurement results.

[0004] The technical solution adopted by the present invention is: a device for detecting the wall thickness and wall thickness difference of a double cone, comprising a workbench, a computer, a double cone positioning seat, a large cone measuring assembly and a small cone measuring assembly; the double cone positioning seat, the large cone measuring assembly and the small cone measuring assembly are installed on the workbench, the double cone positioning seat clamps the double cone workpiece and enables the double cone workpiece to rotate; the large cone measuring assembly and the small cone measuring assembly are arranged close to the large end of the double cone workpiece;

[0005] The large cone measuring assembly comprises a base I, a slide seat I, a driving device I, a large cone outer measuring rod and a large cone inner measuring rod; the base I is provided with a slide rail, the slide seat I is placed on the slide rail, and the driving device I can drive the slide seat I to move along the slide rail; the slide seat I is connected to the rear ends of two leaf spring lever mechanisms respectively through screws, the front ends of the two leaf spring lever mechanisms are respectively installed with a large cone outer measuring rod and a large cone inner measuring rod, a sensor I is provided on the side of the leaf spring lever mechanism, the large cone outer measuring rod and the large cone inner measuring rod are arranged in parallel, and a measuring head I is provided on the side opposite to the end of the large cone outer measuring rod and the large cone inner measuring rod; the two measuring heads I are coaxial and arranged perpendicular to the large cone surface generatrix of the double cone workpiece;

[0006] The small cone measuring assembly comprises a base II, a slide II, a driving device II, a small cone outer measuring rod and a small cone inner measuring rod; a slide rail is provided on the base II, and the slide II is placed on the slide rail; the driving device II can drive the slide II to move along the slide rail; two leaf spring lever mechanisms are provided on the slide II, and the front ends of the two leaf spring lever mechanisms are respectively provided with a small cone outer measuring rod and a small cone inner measuring rod, and the small cone outer measuring rod and the small cone inner measuring rod are arranged in parallel, and a sensor II is provided on the side of the leaf spring lever mechanism, and a measuring head II is provided on the side opposite to the end of the small cone outer measuring rod and the small cone inner measuring rod; the two measuring heads II are coaxially and perpendicular to the small cone surface generatrix of the double cone workpiece; the sensor I, the sensor II, the driving device I, and the driving device II are respectively connected to a computer.

[0007] In the above-mentioned double-cone wall thickness and wall thickness difference detection device, the leaf spring lever mechanism includes a leaf spring mounting seat, a sensor mounting hole connecting the two side surfaces is provided on the leaf spring mounting seat, and an arch-shaped leaf spring groove is provided on the leaf spring mounting seat near the two side surfaces respectively; a rectangular leaf spring groove is provided on the leaf spring mounting seat near the front end, and the two ends of the rectangular leaf spring groove are respectively connected to the two arch-shaped leaf spring grooves; an "L"-shaped leaf spring groove is provided in the middle part of the leaf spring mounting seat, and the "L"-shaped leaf spring groove is connected to an arch-shaped leaf spring groove, and a leaf spring of corresponding shape is provided in the leaf spring groove, respectively, and sensor I and sensor II are installed in the corresponding sensor mounting holes of the leaf spring lever mechanism, and the contacts of sensor I and sensor II are in contact with the leaf springs in the corresponding arch-shaped leaf spring grooves.

[0008] In the above-mentioned double-cone wall thickness and wall thickness difference detection device, the driving device I includes a screw rod I, a stepper motor I and a nut I; the stepper motor I is fixedly installed at the bottom of the workbench, the output shaft of the stepper motor I is connected to the screw rod I, the nut I is threadedly connected to the screw rod I, the nut I is connected to the slide seat I, and the stepper motor I is connected to the computer; or the driving device I adopts a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixedly installed at the bottom of the workbench, and the piston rod of the hydraulic cylinder is connected to the slide seat I.

[0009] In the above-mentioned double-cone wall thickness and wall thickness difference detection device, the driving device II includes a screw rod II, a stepper motor II and a nut II; the stepper motor II is fixedly installed at the bottom of the workbench, the output shaft of the stepper motor II is connected to the screw rod II, the nut II is threadedly connected to the screw rod II, the nut II is connected to the slide II, and the stepper motor II is connected to the computer; or the driving device II adopts a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixedly installed at the bottom of the workbench, and the piston rod of the hydraulic cylinder is connected to the slide II.

[0010] In the above-mentioned double-cone wall thickness and wall thickness difference detection device, the double-cone positioning seat includes a large-cone positioning seat and a small-cone positioning seat, and the large-cone positioning seat includes a support seat and a positioning tube; a bearing seat is provided on the upper part of the support seat, the rear part of the positioning tube is cylindrical and installed in the bearing of the bearing seat, and the front part of the positioning tube is conical and is used to position the large end of the double-cone workpiece;

[0011] The small cone positioning seat comprises a clamping guide rail, a clamping seat, a positioning bearing seat, a rotating device, a clamping rod, a handle and a connecting rod; the clamping guide rail is fixedly mounted on the workbench, and the clamping guide rail is parallel to the axis of the positioning tube; the clamping seat is placed on the clamping guide rail and can slide along the clamping guide rail, and the positioning bearing seat is mounted on the clamping seat; the positioning bearing seat is equipped with a positioning shaft through a bearing, and a positioning hole is provided at one end of the positioning shaft facing the positioning tube, and the other end of the positioning shaft is connected to the rotating device; the positioning hole is used to position the small end of the double cone workpiece, and the positioning hole is coaxial with the positioning tube; the clamping seat is provided with a through hole, one end of the clamping rod is provided with a thread, and the end is inserted into the through hole, and the clamping rod is provided with a clamping nut and a clamping spring, the clamping nut is screwed to the thread, and the two ends of the clamping spring are respectively in contact with the clamping seat and the clamping nut; the other end of the clamping rod is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the hinge ear at the bottom of the handle, and the hinge ear at the bottom of the handle is hinged to the workbench.

[0012] In the above-mentioned device for detecting the wall thickness and wall thickness difference of a double cone, the rotating device is a hand wheel, and the rotating shaft of the hand wheel is connected to the positioning shaft through a spline.

[0013] In the above-mentioned double-cone wall thickness and wall thickness difference detection device, the rotating device adopts a stepper motor, the stepper motor is installed on the motor mounting seat, the motor mounting seat is installed on the clamping seat, the output shaft of the stepper motor is connected to the positioning shaft, and the stepper motor is connected to the computer.

[0014] The above-mentioned double-cone wall thickness and wall thickness difference detection device also includes a frame, the workbench and computer are installed on the frame, and the frame is also provided with an alarm light, an electrical cabinet and a printer. The electrical cabinet supplies power to the computer, measuring head I, measuring head II, stepper motor I, stepper motor II, and stepper motor; the printer is connected to the computer.

[0015] In the above-mentioned double-cone wall thickness and wall thickness difference detection device, a pneumatic slide is fixedly installed on the slide II, the piston rod of the cylinder of the pneumatic slide is connected to a leaf spring lever mechanism, and another leaf spring lever mechanism on the slide II is fixedly connected to the slide II.

[0016] Compared with the existing measurement technology, the beneficial effects of the present invention are:

[0017] The invention has the advantages of simple structure, convenient operation, accurate and reliable measurement results and good repeatability. The invention controls the feeding of a large cone measuring component and a small cone measuring component by a computer to simultaneously measure the wall thickness of the large cone and the small cone of a double-cone workpiece; automatically processes, analyzes and evaluates the measurement results, and automatically generates a test result report, thereby realizing the automation of the measurement of the wall thickness and wall thickness difference of the double cone, eliminating human influence, and improving the measurement accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the present invention.

[0019] Figure 2 It is a left side view of the present invention.

[0020] Figure 3 It is a top view of the workbench of the present invention.

[0021] Figure 4 It is a front view of a workbench of the present invention.

[0022] Figure 5 yes Figure 3 Middle AA section view.

[0023] Figure 6 It is an enlarged view of the leaf spring lever mechanism of the present invention.

[0024] Figure 7 It is a structural diagram of the rotating device of the small cone positioning seat of the present invention when a hand wheel is used. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-Figure 2 As shown, the present invention includes a frame 1, a workbench 3, an alarm light 104, a computer 105, a large cone positioning seat, a small cone positioning seat, a large cone measuring assembly and a small cone measuring assembly. The workbench 3, the alarm light 104 and the computer 105 are installed on the frame. The computer 105 is a touch screen computer. The alarm light 104 is a three-color alarm light. The alarm light 104 is connected to the computer 105. The frame is also provided with an electrical cabinet 103, a keyboard drawer 101 and a printer 102. The electrical cabinet 103 supplies power to the computer, the alarm light 8 and the printer 102. The printer 102 is connected to the computer 9 for printing the measurement results. An air filter 26 is provided in the electrical cabinet 103.

[0027] like Figure 3-4As shown, the large cone positioning seat 14 includes a support seat 141 and a positioning tube 142; a bearing seat is provided on the upper part of the support seat 141; the rear part of the positioning tube 142 is cylindrical and installed in the bearing of the bearing seat, and the front part of the positioning tube 142 is conical and is used to position the large end of the double cone workpiece. The support seat 141 is fixedly installed on the workbench 3.

[0028] The small cone positioning seat 7 includes a clamping guide rail 5, a clamping seat 2, a positioning bearing seat 73, a rotating device 74, a clamping rod 4, a handle 22 and a connecting rod 21; the clamping guide rail 5 is fixedly mounted on the workbench 3, and the clamping guide rail 5 is parallel to the axis of the positioning tube 142. The clamping seat 2 is placed on the clamping guide rail 5 and can slide along the clamping guide rail 5. The positioning bearing seat 73 is installed on the clamping seat 2; the positioning bearing seat 73 is installed with a positioning shaft 71 through a bearing, and a positioning hole 72 is provided at one end of the positioning shaft 71 facing the positioning tube. The positioning hole 72 adopts a structure of a cylindrical blind hole with an embedded spline sleeve. The other end of the positioning shaft 71 is connected to the rotating device, and the rotating device can drive the positioning shaft 71 to rotate, thereby driving the double cone workpiece to rotate, and measuring the side wall thickness of the double cone workpiece for one circle. The positioning hole 72 is used to position the small end of the double cone workpiece, and the positioning hole 72 is coaxial with the positioning tube 142. The clamping seat 2 is provided with a through hole, one end of the clamping rod 4 is provided with a thread, and the end is inserted into the through hole, and the clamping rod 4 is provided with a clamping nut 42 and a clamping spring 41, the clamping nut 42 is screwed with the thread, and the two ends of the clamping spring 41 are in contact with the clamping seat 2 and the clamping nut 42 respectively. The clamping rod 4 is arranged parallel to the clamping guide rail 5, and the other end of the clamping rod 4 is hinged to one end of the connecting rod 21, and the other end of the connecting rod 21 is hinged to the hinge ear at the bottom of the handle 22, and the hinge ear at the bottom of the handle 22 is hinged to the workbench 3. By pulling the handle, the clamping rod 4 can be pushed or retracted toward the large cone positioning seat 14; and then the clamping spring 41 on the clamping rod 4 pushes the clamping seat 2 to move toward the large cone positioning seat 14 or move in the opposite direction, so as to clamp or release the double cone workpiece.

[0029] like Figure 7 As shown, the rotating device 74 can be a hand wheel, and the rotating shaft of the hand wheel is connected to the positioning shaft 71 through a spline. By manually turning the hand wheel, the rotation of the double cone workpiece is achieved. Figure 4 As shown, the rotating device can also be a stepper motor, which is mounted on a motor mounting seat 23, which is mounted on a clamping seat 2, and the output shaft of the stepper motor is connected to the positioning shaft, and the stepper motor is connected to a computer 105. The stepper motor drives the positioning shaft 71 to rotate, thereby realizing the rotation of the double cone workpiece.

[0030] The large cone measuring assembly 8 and the small cone measuring assembly 9 are arranged near the large end of the double cone workpiece; the large cone measuring assembly 8 comprises a base Ⅰ81, a slide Ⅰ82, a drive device Ⅰ83, two leaf spring lever mechanisms 89, a large cone outer measuring rod 84 and a large cone inner measuring rod 85. Figure 6 As shown, the leaf spring lever mechanism 89 includes a leaf spring mounting seat 891, on which a sensor mounting hole connecting the two side surfaces is provided, and an arcuate leaf spring groove 892 is provided on the leaf spring mounting seat near the two side surfaces; a rectangular leaf spring groove 893 is provided on the leaf spring mounting seat 891 near the front end, and the two ends of the rectangular leaf spring groove 893 are respectively connected to the two arcuate leaf spring grooves 892. An "L"-shaped leaf spring groove 894 is provided in the middle of the leaf spring mounting seat 891, and the "L"-shaped leaf spring groove 894 is connected to an arcuate leaf spring groove, and a leaf spring of a corresponding shape is provided in each leaf spring groove.

[0031] The base Ⅰ81 is provided with a slide rail 86, and the slide seat Ⅰ82 is provided with a slide groove corresponding to the slide rail 86. The slide rail 86 is nested in the slide groove, and the slide seat Ⅰ82 can move along the slide rail 86. The slide seat Ⅰ82 is connected to the rear ends of two leaf spring lever mechanisms 89 by screws, and the front ends of the two leaf spring lever mechanisms 89 are respectively connected with a large cone outer measuring rod 84 and a large cone inner measuring rod 85. A sensor I88 is provided in the sensor installation hole of the leaf spring lever mechanism. The large cone outer measuring rod 84 and the large cone inner measuring rod 85 are arranged in parallel. The ends of the large cone outer measuring rod 84 and the large cone inner measuring rod 85 are provided with a measuring head Ⅰ87 on the opposite side. The two measuring heads Ⅰ87 are coaxial and perpendicular to the large cone surface generatrix of the double cone workpiece. The sensor I88 is connected to the computer 105, and the contact of the sensor I88 contacts the leaf spring in a bow-shaped leaf spring groove.

[0032] like Figure 5 As shown, the driving device I83 comprises a screw rod I831, a stepper motor I832 and a nut I833; the stepper motor I832 is fixedly mounted at the bottom of the workbench 3, the output shaft of the stepper motor I832 is connected to the screw rod I831 through a coupling 834, the screw rod I831 is arranged parallel to the slide rail 86, and the screw rod I831 is installed at the bottom of the workbench 3 through bearing seats 835 and 836. The nut I833 is screwed to the screw rod I831, and the nut I833 is connected to the slide seat I82 through a connecting plate 837. The stepper motor I832 is connected to the computer 105, and the stepper motor I832 drives the nut I833 to rotate, converts the rotation into movement, drives the slide seat I82 to move along the slide rail 86, extends the large cone inner measuring rod 85 into the inner cavity of the double cone workpiece, and makes the measuring head I perpendicular to the side wall of the double cone workpiece. The driving device I83 may also be a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixedly installed at the bottom of the workbench 3, the piston rod of the hydraulic cylinder is connected to the slide seat I82, and the slide seat I82 moves along the slide rail 86 by the extension and retraction of the piston rod.

[0033] The small cone measuring assembly 9 includes a base II 91, a slide II 92, a driving device II, a small cone outer measuring rod 94 and a small cone inner measuring rod 95; the base II 91 is provided with a slide rail 96, the slide II 92 is provided with a slide groove corresponding to the slide rail, the slide rail 96 is nested in the slide groove, and the slide II 92 can move along the slide rail 96. The slide II 92 is provided with two leaf spring lever mechanisms 89 and a pneumatic slide 99, the rear end of the leaf spring lever mechanism 89 is fixedly connected to the slide II 92 by screws, the pneumatic slide 99 is fixedly installed on the slide II 92, and the piston rod of the cylinder of the pneumatic slide 99 is connected to another leaf spring lever mechanism, which can drive the other leaf spring lever mechanism to move perpendicularly to the slide rail 96, so as to realize the opening and closing of the small cone outer measuring rod 94 when measuring the small cone surface. A sensor II 98 is arranged in the sensor installation hole of a leaf spring lever mechanism, and a small cone outer measuring rod 94 and a small cone inner measuring rod 95 are arranged at the front ends of the two leaf spring lever mechanisms 89, and the small cone outer measuring rod 94 and the small cone inner measuring rod 95 are arranged in parallel. A measuring head II 97 is arranged on the opposite side of the ends of the small cone outer measuring rod 94 and the small cone inner measuring rod 95, and the two measuring heads II 97 are arranged coaxially and perpendicular to the generatrix of the small cone surface of the double cone workpiece. The driving device II includes a screw rod II, a stepping motor II and a nut II; the stepping motor II is fixedly installed at the bottom of the workbench 3, the output shaft of the stepping motor II is connected to the screw rod II, the nut II is screwed to the screw rod II, the nut II is connected to the slide seat II, the screw rod II is parallel to the slide rail 96, and the stepping motor II is connected to the computer 105. The driving device II can also be a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixedly installed at the bottom of the workbench 3, and the piston rod of the hydraulic cylinder is connected to the slide seat II 92. A sensor II 98 is provided on the rear end side surface of the measuring rod 94 in the small cone. The sensor II 98 is connected to the computer 105. The contact of the sensor II 98 contacts the leaf spring in an arcuate leaf spring groove.

[0034] When the present invention is used to detect the axial and radial wall thickness values ​​and wall thickness differences of a double cone, the present invention comprises the following steps:

[0035] S1. According to the size and shape of the double-cone workpiece to be measured, adjust the large cone measuring component 8 and the small cone measuring component 9, determine the origin position, the effective measuring stroke range of the measuring head Ⅰ87 and the measuring head Ⅱ97, and the measurement starting position, measurement end position, moving distance, collection interval steps, moving speed and other parameters of the large cone surface and small cone surface of the double-cone workpiece.

[0036] S2. Place the double-cone workpiece to be measured between the small-cone positioning seat 9 and the large-cone positioning seat 8, pull the handle 22 to fix the double-cone workpiece to be measured, and adjust the expansion and contraction amount of the compression spring by adjusting the compression nut 42 to adjust the size of the compression force to make the pressure moderate.

[0037] S3. The touch screen computer controls the driving device I83 and the driving device II, driving the measuring head I87 and the measuring head II97 to move at the set position, moving speed, interval and moving distance respectively, and synchronously measure the generatrix positions of the large cone and the small cone of the double-cone workpiece, complete the axial measurement sampling at each generatrix measuring point position, and the rotating device drives the measured double-cone workpiece to rotate one circle.

[0038] The process of measuring component movement and data collection is as follows:

[0039] When calibrating measuring head Ⅰ87 and measuring head Ⅱ97, use gauge blocks to calibrate the lower and upper limits of the measuring range of measuring head Ⅰ87 and measuring head Ⅱ97, and compensate the errors of quasi-measuring head Ⅰ87 and measuring head Ⅱ97 through measuring software;

[0040] Use the gauge block to calibrate and correct the lower and upper limits of the inspection points of sensor I88 and sensor II98 point by point, and calculate the correction value βi , the calculation formula is: βi = Li + δi - li ,in: Li is the theoretical size of the gauge block, δi is the standard deviation of the gauge block, li is the actual size detected by the sensor.

[0041] The probes of sensor I88 and sensor II98 move axially synchronously on the generatrix of the large and small cones of the double cone to perform axial measurement. Each time the measuring heads I87 and II97 move to a measuring point, they synchronously complete the measurement of the axial wall thickness value. Then the rotating device drives the double cone workpiece to rotate for circumferential measurement. At the same time, sensors I88 and II98 collect data, control the double cone workpiece to rotate 360° and then stop rotating. The data measured by sensors I88 and II98 are uploaded to computer 105, and computer 105 calculates the average value, maximum value and minimum value of the data collected in this rotation. When the data collection of the last measuring point is completed, the data collected by all axial measuring points of computer 105 are collected. x i For comparison, i is the serial number of the axial measuring point, and the maximum value of the wall thickness of the axial measuring point is obtained. x imax and minimum value x imin , and then calculate the axial wall thickness difference △ axis, △ Axis = x imax - x imin . Data collected from all circumferential measuring points at the same axial measuring point xj For comparison, j is the serial number of the circumferential measuring point, and the maximum value of the wall thickness of the circumferential measuring point is obtained. x jmax and minimum value x jmin , and then calculate the circumferential wall thickness difference at the axial measuring point △ Week i= x jmax - x jmin ; Compare the circumferential wall thickness differences of all axial measuring points to obtain the maximum circumferential wall thickness difference, which is the circumferential wall thickness difference △ week.

[0042] Taking the measurement results of a double-cone workpiece with a wall thickness of 3.5±0.020mm as an example, the calculation method of the axial wall thickness difference and the circumferential wall thickness difference is explained, see the table below.

[0043] Axial wall thickness difference

[0044] Axial measuring point number 1 2 3 4 Axial wall thickness difference / mm Axial wall thickness / mm 3.511 3.507 3.505 3.509 <![CDATA[ △ Axis = x imax - x imin =3.511-3.505=0.006]]>

[0045] Circumferential wall thickness difference

[0046] Axial measuring point number 1 2 3 Circumferential wall thickness difference / mm Circumferential wall thickness difference at each axial measuring point / mm <![CDATA[ △ 周1 = x max - x min =0.007]]> <![CDATA[ △ 周2 = x max - x min =0.010]]> <![CDATA[ △ 周3 = x max - x min =0.011]]> 0.011

[0047] S4. The obtained axial and radial wall thickness and wall thickness difference data are saved, analyzed, processed and evaluated, the alarm lamp 104 gives an audible and visual indication of whether the measurement is qualified or not, and the measuring assembly returns to the machine working origin position. At the same time, a test report is generated and output by a printer.

[0048] The present invention uses a gauge block to automatically calibrate the accuracy and error compensation of the measuring head I87 and the measuring head II97, thereby eliminating the system error of the present invention, adopts a direct measurement method within the measuring range, and uses a high-precision sensor to collect data, further reducing the human error in the detection process, and has good repeatability. The present invention realizes automatic resetting and zeroing, automatic measurement, automatic collection of measurement data, automatic processing, analysis, and evaluation of measurement results, has an automatic alarm function for qualified or unqualified, and automatically generates a test result report, greatly improving work efficiency.

Claims

1. A device for detecting the wall thickness and wall thickness difference of a double cone, characterized by: It includes a workbench, a computer, a double cone positioning seat, a large cone measuring assembly and a small cone measuring assembly; the double cone positioning seat, the large cone measuring assembly and the small cone measuring assembly are installed on the workbench, the double cone positioning seat clamps the double cone workpiece and enables the double cone workpiece to rotate; the large cone measuring assembly and the small cone measuring assembly are arranged near the large end of the double cone workpiece; The large cone measuring assembly comprises a base I, a slide seat I, a driving device I, a large cone outer measuring rod and a large cone inner measuring rod; the base I is provided with a slide rail, the slide seat I is placed on the slide rail, and the driving device I can drive the slide seat I to move along the slide rail; the slide seat I is connected to the rear ends of two leaf spring lever mechanisms respectively through screws, the front ends of the two leaf spring lever mechanisms are respectively installed with a large cone outer measuring rod and a large cone inner measuring rod, a sensor I is provided on the side of the leaf spring lever mechanism, the large cone outer measuring rod and the large cone inner measuring rod are arranged in parallel, and a measuring head I is provided on the side opposite to the end of the large cone outer measuring rod and the large cone inner measuring rod; the two measuring heads I are coaxial and arranged perpendicular to the large cone surface generatrix of the double cone workpiece; The small cone measuring assembly comprises a base II, a slide II, a driving device II, a small cone outer measuring rod and a small cone inner measuring rod; the base II is provided with a slide rail, and the slide II is placed on the slide rail; the driving device II can drive the slide II to move along the slide rail; the slide II is provided with two leaf spring lever mechanisms, the front ends of the two leaf spring lever mechanisms are respectively provided with a small cone outer measuring rod and a small cone inner measuring rod, the small cone outer measuring rod and the small cone inner measuring rod are arranged in parallel, a sensor II is provided on the side of the leaf spring lever mechanism, and a measuring head II is provided on the side opposite to the end of the small cone outer measuring rod and the small cone inner measuring rod; the two measuring heads II are coaxial and perpendicular to the small cone surface generatrix of the double cone workpiece; the sensor I, the sensor II, the driving device I, and the driving device II are respectively connected to a computer; The leaf spring lever mechanism comprises a leaf spring mounting seat, a sensor mounting hole connected to two side surfaces is provided on the leaf spring mounting seat, and an arcuate leaf spring groove is respectively provided on the leaf spring mounting seat near the two side surfaces; a rectangular leaf spring groove is provided on the leaf spring mounting seat near the front end, and the two ends of the rectangular leaf spring groove are respectively connected to the two arcuate leaf spring grooves; an "L"-shaped leaf spring groove is provided in the middle of the leaf spring mounting seat, and the "L"-shaped leaf spring groove is connected to an arcuate leaf spring groove, and a leaf spring of a corresponding shape is respectively provided in the leaf spring groove, and the sensor I and the sensor II are installed in the corresponding sensor mounting holes of the leaf spring lever mechanism, and the contacts of the sensor I and the sensor II are in contact with the leaf springs in the corresponding arcuate leaf spring grooves; The double cone positioning seat includes a large cone positioning seat and a small cone positioning seat, and the large cone positioning seat includes a support seat and a positioning tube; a bearing seat is provided on the upper part of the support seat, the rear part of the positioning tube is cylindrical and installed in the bearing of the bearing seat, and the front part of the positioning tube is conical and is used to position the large end of the double cone workpiece; The small cone positioning seat comprises a clamping guide rail, a clamping seat, a positioning bearing seat, a rotating device, a clamping rod, a handle and a connecting rod; the clamping guide rail is fixedly mounted on the workbench, and the clamping guide rail is parallel to the axis of the positioning tube; the clamping seat is placed on the clamping guide rail and can slide along the clamping guide rail, and the positioning bearing seat is mounted on the clamping seat; the positioning bearing seat is equipped with a positioning shaft through a bearing, and a positioning hole is provided at one end of the positioning shaft facing the positioning tube, and the other end of the positioning shaft is connected to the rotating device; the positioning hole is used to position the small end of the double cone workpiece, and the positioning hole is coaxial with the positioning tube; the clamping seat is provided with a through hole, one end of the clamping rod is provided with a thread, and the end is inserted into the through hole, and the clamping rod is provided with a clamping nut and a clamping spring, the clamping nut is screwed to the thread, and the two ends of the clamping spring are respectively in contact with the clamping seat and the clamping nut; the other end of the clamping rod is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the hinge ear at the bottom of the handle, and the hinge ear at the bottom of the handle is hinged to the workbench.

2. The device for detecting the wall thickness and wall thickness difference of a double cone according to claim 1, characterized in that: The driving device I comprises a screw rod I, a stepper motor I and a nut I; the stepper motor I is fixedly installed at the bottom of the workbench, the output shaft of the stepper motor I is connected to the screw rod I, the nut I is threadedly connected to the screw rod I, the nut I is connected to the slide seat I, and the stepper motor I is connected to the computer; or the driving device I adopts a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixedly installed at the bottom of the workbench, and the piston rod of the hydraulic cylinder is connected to the slide seat I.

3. The device for detecting the wall thickness and wall thickness difference of a double cone according to claim 1, characterized in that: The driving device II comprises a screw rod II, a stepper motor II and a nut II; the stepper motor II is fixedly installed at the bottom of the workbench, the output shaft of the stepper motor II is connected to the screw rod II, the nut II is threadedly connected to the screw rod II, the nut II is connected to the slide seat II, and the stepper motor II is connected to the computer; or the driving device II adopts a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixedly installed at the bottom of the workbench, and the piston rod of the hydraulic cylinder is connected to the slide seat II.

4. The device for detecting the wall thickness and wall thickness difference of a double cone according to claim 1, characterized in that: The rotating device adopts a hand wheel, and the rotating shaft of the hand wheel is connected with the positioning shaft through a spline.

5. The device for detecting the wall thickness and wall thickness difference of a double cone according to claim 1, characterized in that: The rotating device adopts a stepper motor, which is mounted on a motor mounting seat, which is mounted on a clamping seat, an output shaft of the stepper motor is connected to a positioning shaft, and the stepper motor is connected to a computer.

6. The device for detecting the wall thickness and wall thickness difference of a double cone according to claim 1, characterized in that: It also includes a rack, the workbench and the computer are installed on the rack, and the rack is also provided with an alarm light, an electrical cabinet and a printer. The electrical cabinet supplies power to the computer, the measuring head I, the measuring head II, the stepper motor I, the stepper motor II and the stepper motor; the printer is connected to the computer.

7. The device for detecting the wall thickness and wall thickness difference of a double cone according to claim 1, characterized in that: A pneumatic slide is fixedly mounted on the slide II, a piston rod of the cylinder of the pneumatic slide is connected to a leaf spring lever mechanism, and another leaf spring lever mechanism on the slide II is fixedly connected to the slide II.

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