A non-standard measurement compensation method

Abstract

The present invention discloses a non-standard measurement temperature compensation method, comprising the following steps: step 1, calibrating the temperature compensation coefficient; step 2, performing three-level temperature compensation: S1, monitoring the temperature change of the equipment, calculating the compensation value δ of the detection equipment body 设备 ; S2, place the zeroing mark on the detection position of the detection device body, adjust the size detection sensor position, when it contacts the zeroing mark, the size detection sensor is zeroed, the temperature sensor monitors the temperature change of the zeroing mark, and calculates the compensation value δ of the zeroing mark 标件 ; S3, remove the zeroing standard, place the workpiece to be measured on the detection position of the detection equipment body, and the size detection sensor detects the size L of the workpiece to be measured 实测 , calculate the compensation value δ of the workpiece being measured 工件 ; Step 3, compensate the measured size of the workpiece, L 补后 =L 实测 +δ 设备 +δ 标件 +δ 工件 , where L 补后 It is the size obtained after compensation of the measured workpiece. The present invention can improve the measurement accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of precision testing, and in particular to a non-standard measurement temperature compensation method. Background Art

[0002] There are many factors that affect the accuracy of measuring equipment, and one of the most important factors to consider is temperature. The most suitable condition for calibrating equipment and measuring parts is 20°C. Practice shows that testing equipment is often used under workshop conditions or conditions that do not fully meet the requirements of the standard measurement environment. For non-standard testing equipment, especially non-standard equipment using relative measurement, its temperature compensation must consider the compensation of three levels: the equipment body, the zeroing standard parts, and the workpiece being measured. Temperature compensation must be performed separately to obtain more accurate measurement results. The present invention provides a temperature compensation method that can perform real-time temperature monitoring of equipment, standard parts, and workpieces and can achieve step-by-step compensation. Summary of the invention

[0003] The purpose of the present invention is to provide a non-standard measurement temperature compensation method in view of the technical defects existing in the prior art.

[0004] The technical solution adopted to achieve the purpose of the present invention is:

[0005] A non-standard measurement temperature compensation method comprises the following steps:

[0006] Step 1, calibrate the temperature compensation coefficient:

[0007] In the normal room temperature range of 18 to 30°C, the dimensional changes of the testing equipment body, the zeroing standard and the workpiece under test are monitored, the temperature expansion coefficients are calculated, the compensation function is fitted, and the compensation curve is generated in the software system.

[0008] Step 2: Perform three-level temperature compensation:

[0009] S1, monitor the temperature change of the device. When the temperature difference detected by the two temperature sensors monitoring the detection device body f is less than 2°C, the detection device body f is temperature compensated according to the compensation curve of step 1 to obtain the compensation value δ of the detection device body f under the theoretical measurement environment of 20°C 设备 ;

[0010] S2, place the zeroing mark e on the detection position of the detection device body f, adjust the position of the size detection sensor, when it contacts the zeroing mark, the size detection sensor is zeroed, the temperature sensor monitors the temperature change of the zeroing mark, when the temperature difference monitored by the two temperature sensors monitoring the zeroing mark is less than 2°C, according to the compensation curve of step 1, the zeroing mark is temperature compensated to obtain the compensation value δ of the zeroing mark under the theoretical measurement environment of 20°C 标件 ;

[0011] S3, remove the zeroing mark, place the workpiece to be measured on the detection position of the detection equipment body, and the size detection sensor detects the size L of the workpiece to be measured 实测 The temperature sensor monitors the temperature change of the workpiece under test. When the temperature difference detected by the two temperature sensors monitoring the temperature change of the workpiece under test is less than 2°C, the workpiece under test is temperature compensated according to the compensation curve in step 1 to obtain the compensation value δ of the workpiece under the theoretical measurement environment of 20°C. 工件 ;

[0012] Step 3: Compensate the measured dimensions of the workpiece.

[0013] L 补后 =L 实测 +δ 设备 +δ 标件 +δ 工件 , where L 补后 It is the size obtained after compensation of the measured workpiece.

[0014] In the above technical solution, in step 1, the dimensional data at different temperatures are fitted into a compensation curve using Minitab data fitting software.

[0015] In the above technical solution, two size detection sensors are correspondingly arranged at the two ends of the workpiece to be measured, and the non-standard measurement temperature compensation method uses a total of four temperature sensors, two equipment temperature sensors are arranged on the equipment base plane, and are used to monitor the temperature change of the detection equipment body in step S1;

[0016] Two workpiece temperature sensors are respectively arranged near the two size detection sensors and enter the detection position synchronously therewith, and are used for monitoring the zeroing mark in step S2 and for monitoring the temperature change of the measured part in step S3.

[0017] In the above technical solution, the zero-setting mark and the workpiece to be measured are made of the same material and have the same shape and size.

[0018] In the above technical solution, the size detection sensor and the workpiece temperature sensor enter or exit the detection position under the action of the micro-adjustment mechanism.

[0019] The micro-adjustment mechanism includes a slide plate and a driving component for driving the slide plate to enter or exit a measuring position;

[0020] The size detection sensor is assembled on the slide plate through a micro-slide table;

[0021] The workpiece temperature sensor is arranged on the slide plate through a propulsion component, and the propulsion component includes a linear guide rail fixed on the slide plate, a front slider and a rear slider slidably connected to the linear guide rail, a retractable guide rod connecting the front slider and the rear slider, and a driving component driving the rear slider to move along the linear guide rail, and the workpiece temperature sensor is fixed on the front slider.

[0022] In the above technical solution, the adjustment method of the sensor fine-motion adjustment mechanism includes the following steps:

[0023] Step 1: After the workpiece to be measured is placed, the driving component is started, and under the driving action of the driving component, the slide plate enters the measuring position;

[0024] Step 2, adjusting the micro-slide table so that the size detection sensor contacts the calibration surface of the zero-setting standard;

[0025] Step 3, start the driving component, which drives the front slider and the rear slider to move forward at the same time. After the workpiece temperature sensor contacts the workpiece, the driving component continues to drive the rear slider, and the retractable guide rod is compressed, thereby applying thrust to the front slider, so that the workpiece temperature sensor is always in contact with the workpiece to be measured, thereby realizing synchronous measurement of the workpiece size and temperature.

[0026] In step S2, the dimension detection sensor is set to zero by adjusting the micro-slide table so that the dimension detection sensor fits the zeroing mark. Then, in step S3, the dimension detection sensor detects the dimension of the workpiece to be measured.

[0027] In the above technical solution, the driving assembly includes a driving cylinder and a connecting seat assembled on the piston rod of the driving cylinder, the connecting seat is fixed on the skateboard, a slider is fixed at the bottom of the skateboard, and the slider is slidably connected to the slide rail. When the skateboard enters the measuring position, the driving cylinder is started, the piston rod of the driving cylinder extends, and pushes the connecting seat forward, and the connecting seat drives the skateboard forward. During the forward movement of the skateboard, the slider moves forward along the slide rail. When the skateboard is pushed out of the measuring position, the movement direction is opposite. The driving cylinder is a single-bar double-outlet cylinder, which is used to drive the skateboard to slide along the slide rail to realize the overall movement of the measuring mechanism. The skateboard is connected to the slider by screws, and the driving cylinder drives the lower slider to move linearly along the slide rail.

[0028] In the above technical solution, the connecting seat is assembled on the piston rod of the driving cylinder through a universal joint. The universal joint is a standard universal part, which can reduce the parallelism requirements of the driving cylinder and the slide rail, and ensure that the measuring mechanism enters or exits the measuring position in a straight line. The connecting seat is connected to the slide plate and the universal joint through screws, and is an intermediate transition connecting piece.

[0029] In the above technical solution, the driving member is a cylinder, and the piston rod of the cylinder is fixedly connected to the rear slider. When the cylinder is started, the cylinder pushes the rear slider to move along the linear guide rail.

[0030] In the above technical solution, the telescopic member includes a connecting rod and a spring sleeved outside the connecting rod, the front end of the connecting rod is fixed on the front slider, the rear end is sleeved on the rear slider, and a limiter is fixed at the rear end, and the two ends of the spring are respectively against the front slider and the rear slider. Furthermore, one end of the connecting rod is fixed to the front slider by a screw, and the other end passes through the upper through hole of the rear slider, and the spring is sleeved outside the connecting rod, so that the front and rear sliders can be synchronously linked.

[0031] In the above technical solution, the workpiece temperature sensor is fixed on the front slider through a first clamping seat. The workpiece temperature sensor is a thermocouple temperature measuring element with a temperature measurement accuracy of ±0.5°C. The first clamping seat is used to clamp the workpiece temperature sensor.

[0032] In the above technical solution, the first clamping seat is an L-shaped structure, and a long through slot is provided on its long side, and a fastening screw passes through the long through slot to press and fix the first clamping seat on the front slider. The workpiece temperature sensor clamped thereon can be withdrawn in the reverse direction of its entry direction, and always keeps moving forward under the action of the spring force, so as to ensure that the workpiece temperature sensor is always in contact with the workpiece.

[0033] In the above technical solution, the micro-slide is fixed on the slide, and the size detection sensor is assembled on the micro-slide through the second clamping seat.

[0034] In the above technical solution, the dimension detection sensor can be set as a precision measuring element such as a dial indicator, a comparator, etc. according to the measurement requirements, and its accuracy should also match the measurement object.

[0035] In the above technical solution, the zeroing mark includes a zeroing mark and a right scale adjustment disk and a left scale adjustment disk which are detachably fixed to the two ends of the zeroing mark respectively; the outer annular surface of each scale adjustment disk is provided with continuous scale segments with the same arc length but different radii.

[0036] In the above technical solution, the calibration method of the concentric measuring point position calibration tool for shaft parts is:

[0037] When the measuring point position adjustment is not required, the engraved adjustment disk is not assembled, and the position of the workpiece temperature sensor is adjusted so that it contacts any position of the end surface of the large diameter section at both ends of the zeroing standard to complete the zero position calibration of the workpiece temperature sensor 6;

[0038] When it is necessary to adjust the measuring point position, install the right scale adjustment disk and the left scale adjustment disk at the two ends of the zeroing mark respectively, contact the workpiece temperature sensor with the corresponding radius end face of the scale adjustment disk as needed, move the workpiece temperature sensor in the radial direction, and when the measuring range of the workpiece temperature sensor suddenly points to the limit position, it means that it has been adjusted into place and the measuring point position adjustment of the workpiece temperature sensor is completed.

[0039] In the above technical solution, the zeroing mark is a stepped shaft structure, the end faces of the large diameter sections at both ends of the zeroing mark are calibration surfaces, the zeroing mark is formed by turning and grinding, the outer circle and end faces of the large diameter sections at both ends are finely ground, and the zero position calibration of the workpiece temperature sensor is completed when the sensor contacts any position of the calibration surface.

[0040] In the above technical solution, the total runout of the end face of the zero setting mark and the perpendicularity relative to the axis are less than 0.01 mm, so as to ensure the consistency of the axial dimension when used as a zero setting calibration function.

[0041] In the above technical solution, the line adjustment disk is coaxially fixed to the end of the zeroing mark by bolts, the end of the zeroing mark is provided with a smooth section, the smooth section matches the central through hole of the line adjustment disk to load the line adjustment disk, the end face of the zeroing mark is provided with a threaded hole, the outer annular surface of the central through hole is provided with uniformly distributed through holes, the uniformly distributed through holes correspond to the threaded holes respectively, and the fastening screws pass through the uniformly distributed through holes and the threaded holes to fix the line adjustment disk to the zeroing mark.

[0042] In the above technical solution, the radius of the continuous engraved line segment has an accuracy of 0.01 mm. The engraved line segment is formed by precision electric spark cutting, and the radius processing accuracy is 0.01 mm. The radius difference between two adjacent scale segments of the continuous engraved line segment is 0.5 mm.

[0043] In the above technical solution, the score adjustment disk has two adjustment areas, the adjustment range of the continuous score segments in the left adjustment area is R to R+2.5 mm, and the adjustment range of the continuous score segments in the right adjustment area is R+3.0 to R+8.0 mm.

[0044] In the above technical solution, the material of the zeroing mark is the same as that of the workpiece to be measured to maintain the same expansion coefficient and improve the measurement accuracy. The end shapes of the zeroing mark and the workpiece to be measured are the same, which can also improve the measurement accuracy.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. When the ambient temperature changes, causing the size of the equipment body, zero-setting standard and measured workpiece to change, the system monitors the real-time temperature through the temperature sensor and performs step-by-step temperature compensation according to the generated compensation curve, so that the final measurement results can be traced back to the value under 20°C conditions, improving the stability of the measurement and ensuring that the measurement results are not affected by the ambient temperature.

[0047] 2. The present invention provides a special temperature compensation system developed for special measuring equipment. By setting temperature sensor groups for different purposes, the temperature changes of various links that affect the measurement accuracy are accurately monitored, and step-by-step temperature compensation is performed according to a preset temperature compensation curve, forming a three-stage temperature compensation system including the equipment body, zeroing standard and measured workpiece. The accuracy after compensation can reach 0.001mm.

[0048] 3. In order to improve the temperature monitoring accuracy, each temperature monitoring group is equipped with two temperature sensors. When the monitoring temperature difference between the two sensors is less than 2°C, it indicates that the monitored temperature is credible. Only in this case can the corresponding temperature compensation be performed, avoiding the wrong compensation caused by temperature monitoring error and effectively improving the compensation accuracy.

[0049] 4. The calibration tool of the present invention has multifunctional characteristics. When the scale adjustment disk is not loaded, it can be used as an axial length zeroing standard with an accuracy of up to 0.01mm. After the scale adjustment disk is loaded, the calibration tool can not only perform zero position calibration on the sensor, but also has the function of accurately adjusting the position of the sensor along the radial direction of the calibration tool, and the adjustment accuracy can reach 0.01mm. The calibration tool is a functional extension of the conventional calibrator, has a wide range of applications, and can improve the calibration accuracy of conventional methods.

[0050] 5. The micro-adjustment mechanism of the present invention can realize real-time and accurate adjustment of the measuring point position, complete the real-time temperature collection of the workpiece, and improve the consistency of the measurement results of the workpiece under different temperature environments. It has a three-dimensional adjustment function of the measuring point position, and can accurately adjust the measuring point position according to the measurement requirements, with an adjustment accuracy of 0.005mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of the arrangement of the temperature sensor of the present invention;

[0052] Figure 2 This is a flow chart of the warming method;

[0053] Figure 3 Shown is a top view of the micro-adjustment mechanism;

[0054] Figure 4 Shown is an isometric view of the micro-adjustment mechanism.

[0055] Figure 5Shown is a front view of the calibration tool of the present invention;

[0056] Figure 6 A side view of the calibration tool of the present invention;

[0057] Figure 7 This is a partial enlarged view of the engraved adjustment disk.

[0058] Figure 8 This is a schematic diagram of the adjustment of the workpiece temperature sensor.

[0059] In the figure: a-first temperature sensor, b-second temperature sensor, c-third temperature sensor, d-fourth temperature sensor, e-zeroing standard, f-detection device body;

[0060] 1-linear guide, 2-driving cylinder, 3-slide plate, 4-universal joint, 5-connecting seat, 6-workpiece temperature sensor, 7-first clamping seat, 81-front slider, 82-rear slider, 9-telescopic guide rod, 10-cylinder, 11-micro-motion slide, 12-second clamping seat, 13-size detection sensor, 14-slide rail, 15-slide plate, 16-long through slot, 17-fastening screw, 18-connecting rod, 19-spring, 20-limiting piece;

[0061] e1-zeroing mark, e2-right scale adjustment disk, e3-left scale adjustment disk, e4-sensor, e5-center through hole, e6-evenly distributed through holes, e7-left adjustment area, e8-right adjustment area, e9-continuous scale segment. DETAILED DESCRIPTION

[0062] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0063] Example 1

[0064] A non-standard measurement temperature compensation method comprises the following steps:

[0065] Step 1, calibrate the temperature compensation coefficient:

[0066] In the normal room temperature range of 18 to 30°C, the dimensional changes of the testing equipment body f, the zeroing standard e and the workpiece under test are monitored, the temperature expansion coefficients are calculated, the compensation function is fitted, and the compensation curve is generated in the software system.

[0067] Step 2: Perform three-level temperature compensation:

[0068] S1, monitor the temperature change of the device. When the temperature difference detected by the two temperature sensors monitoring the detection device body f is less than 2°C, the detection device body f is temperature compensated according to the compensation curve of step 1 to obtain the compensation value δ of the detection device body f under the theoretical measurement environment of 20°C 设备 ;

[0069] S2, place the zeroing mark e on the detection position of the detection device body f, adjust the position of the size detection sensor, when it contacts the zeroing mark, the size detection sensor is zeroed, the temperature sensor monitors the temperature change of the zeroing mark, when the temperature difference monitored by the two temperature sensors monitoring the zeroing mark is less than 2°C, according to the compensation curve of step 1, the zeroing mark is temperature compensated to obtain the compensation value δ of the zeroing mark under the theoretical measurement environment of 20°C 标件 ;

[0070] S3, remove the zeroing mark, place the workpiece to be measured on the detection position of the detection equipment body, and the size detection sensor detects the size L of the workpiece to be measured 实测 The temperature sensor monitors the temperature change of the workpiece under test. When the temperature difference detected by the two temperature sensors monitoring the temperature change of the workpiece under test is less than 2°C, the workpiece under test is temperature compensated according to the compensation curve in step 1 to obtain the compensation value δ of the workpiece under the theoretical measurement environment of 20°C. 工件 ;

[0071] Step 3: Compensate the measured dimensions of the workpiece.

[0072] L 补后 =L 实测 +δ 设备 +δ 标件 +δ 工件 , where L 补后 It is the size obtained after compensation of the measured workpiece.

[0073] In the above technical solution, in step 1, the dimensional data at different temperatures are fitted to a compensation curve using data fitting software such as Minitab.

[0074] In the above technical solution, two size detection sensors are correspondingly arranged at the two ends of the workpiece to be measured, and the non-standard measurement temperature compensation method uses a total of four temperature sensors, and the first temperature sensor and the second temperature sensor are arranged on the basic plane of the equipment to monitor the temperature change of the detection equipment body in step S1;

[0075] The third temperature sensor and the fourth temperature sensor are respectively arranged near the two size detection sensors and enter the detection position synchronously therewith, and are used for monitoring the zeroing mark in step S2 and for monitoring the temperature change of the measured part in step S3.

[0076] In the above technical solution, the zeroing standard and the workpiece to be measured are made of the same material. When the materials are the same, the expansion coefficients are the same, which can improve the measurement accuracy of the present invention. The zeroing standard and the workpiece to be measured have the same shape and size to improve the measurement accuracy.

[0077] Example 2

[0078] A non-standard measuring device comprises a detection device body f, two device temperature sensors, two workpiece temperature sensors 6, a zeroing mark e and two dimension detection sensors, wherein the two device temperature sensors (a first temperature sensor a and a second temperature sensor b) are arranged on the detection device body f, and the two workpiece temperature sensors 6 (a third temperature sensor c and a fourth temperature sensor d) are respectively arranged near the two dimension detection sensors 13 and enter the detection position synchronously with the two dimension detection sensors.

[0079] Example 3

[0080] On the basis of Example 2, the size detection sensor 13 and the workpiece temperature sensor 6 enter or exit the detection position under the action of the micro-adjustment mechanism.

[0081] The micro-adjustment mechanism includes a slide plate 3 and a driving component for driving the slide plate 3 to enter or exit a measuring position;

[0082] The size detection sensor 13 is assembled on the slide plate 3 via the micro-slide table 11;

[0083] The workpiece temperature sensor is arranged on the slide plate 3 through a propulsion component, and the propulsion component includes a linear guide rail 1 fixed on the slide plate 3, a front slider 81 and a rear slider 82 slidably connected to the linear guide rail 1, a retractable guide rod 9 connecting the front slider 81 and the rear slider 82, and a driving component driving the rear slider 82 to move along the linear guide rail 1, and the workpiece temperature sensor 6 is fixed on the front slider.

[0084] The driving assembly realizes the overall movement of the measuring mechanism. The slide plate 3 is the bearing component of the measuring mechanism, on which the dimension measuring assembly and the temperature monitoring assembly are installed, and can enter or exit the measuring position under the action of the driving assembly. The workpiece temperature sensor 6 can exit in the reverse direction along the direction it entered, and always keep moving forward under the action of the retractable guide rod 9, ensuring that the workpiece temperature sensor 6 is always in contact with the workpiece.

[0085] The adjustment method of the sensor fine-motion adjustment mechanism comprises the following steps:

[0086] Step 1: After the workpiece to be measured is placed, the driving component is started, and under the driving action of the driving component, the slide plate 3 enters the measuring position;

[0087] Step 2, by adjusting the micro-slide 11, the size detection sensor 13 reaches the specified measurement position (when it contacts the calibration surface of the zeroing mark e);

[0088] Step 3, start the driving member, which drives the front slider 81 and the rear slider 82 to move forward at the same time. After the workpiece temperature sensor 6 contacts the workpiece, the driving member continues to drive the rear slider 82, and the retractable guide rod 9 is compressed, thereby applying a thrust to the front slider 81, so that the workpiece temperature sensor 6 is always in contact with the workpiece to be measured, thereby realizing synchronous measurement of the workpiece size and temperature.

[0089] In step S2 of embodiment 1, the dimension detection sensor 13 is set to zero by adjusting the micro-slide 11 so that the dimension detection sensor 13 fits the zeroing mark e. Then, in step S3, the dimension detection sensor 13 detects the dimension of the workpiece to be measured.

[0090] Preferably, the driving assembly includes a driving cylinder 2 and a connecting seat 5 assembled on the piston rod of the driving cylinder 2, the connecting seat 5 is fixed on the skateboard 3, a slider 15 is fixed at the bottom of the skateboard 3, and the slider 15 is slidably connected to the slide rail 14. When the skateboard 3 enters the measuring position, the driving cylinder 2 is started, the piston rod of the driving cylinder 2 is extended, and the connecting seat 5 is pushed forward, and the connecting seat 5 drives the skateboard 3 forward. During the forward movement of the skateboard 3, the slider 15 moves forward along the slide rail 14. When the skateboard 3 is pushed out of the measuring position, the movement direction is opposite. The driving cylinder 2 is a single-bar double-outlet cylinder, which is used to drive the skateboard 3 to slide along the slide rail 14 to realize the overall movement of the measuring mechanism. The skateboard 3 is connected to the slider 15 by screws, and the driving cylinder 2 drives the lower slider 15 to move linearly along the slide rail 14.

[0091] Furthermore, the connection seat 5 is assembled on the piston rod of the driving cylinder 2 through the universal joint 4. The universal joint 4 is a standard universal part, which can reduce the parallelism requirement of the driving cylinder 2 and the slide rail 14, and ensure that the measuring mechanism enters or exits the measuring position in a straight line. The connection seat 5 is connected to the slide plate 3 and the universal joint 4 by screws, and is an intermediate transition connection.

[0092] Preferably, the driving member is a cylinder 10, and a piston rod of the cylinder 10 is fixedly connected to the rear slider 82. When the cylinder 10 is started, the cylinder 10 pushes the rear slider 82 to move along the linear guide rail 1.

[0093] Preferably, the telescopic member includes a connecting rod 18 and a spring 19 sleeved outside the connecting rod 18, the front end of the connecting rod 18 is fixed on the front slider 81, the rear end is sleeved on the rear slider 82, and the rear end is fixed with a limiting member 20, and the two ends of the spring 19 are respectively against the front slider 81 and the rear slider 82. Furthermore, one end of the connecting rod 18 is fixed to the front slider 81 by a screw, and the other end passes through the upper through hole of the rear slider 82, and the spring 19 is sleeved outside the connecting rod 18, so that the synchronous linkage of the front and rear sliders can be realized.

[0094] Start the driving member, which drives the front slider 81 and the rear slider 82 to move forward at the same time (the spring is in a natural state). After the workpiece temperature sensor 6 contacts the workpiece, the driving member continues to drive the rear slider 82, and the spring is compressed 19, so that the workpiece temperature sensor 6 is always in contact with the workpiece being measured.

[0095] Preferably, the workpiece temperature sensor 6 is fixed to the front slider 81 via a first clamping seat 7. The workpiece temperature sensor 6 is a thermocouple temperature measuring element with a temperature measurement accuracy of ±0.5°C. The first clamping seat 7 is used to clamp the workpiece temperature sensor 6.

[0096] Furthermore, the first clamping seat 7 is an L-shaped structure, and a long through slot 16 is provided on its long side, and a fastening screw 17 passes through the long through slot 16 to press and fix the first clamping seat 7 on the front slider 81. The workpiece temperature sensor 6 clamped thereon can be withdrawn in the reverse direction along the entry direction, and always keeps moving forward under the action of the spring force, so as to ensure that the workpiece temperature sensor 6 is always in contact with the workpiece.

[0097] Preferably, the micro-slide 11 is fixed on the slide 3, and the size detection sensor 13 is assembled on the micro-slide 11 through the second clamping seat 12. The micro-slide 11 is a precision displacement control mechanism, which can move freely along the X, Y, and Z directions, and the feed control accuracy reaches 0.005mm. The lower part is connected to the slide 3 by screws, and the upper part is used to install the second clamping seat 12. The second clamping seat 12 is used to clamp the size detection sensor 13 or a measuring unit such as a dial indicator, and the lower part is connected to the micro-slide 11 by screws.

[0098] Furthermore, the size detection sensor 13 can be set as a precision measuring element such as a dial indicator, a comparator, etc. according to the measurement requirements, and its accuracy should also match the measurement object.

[0099] Example 4

[0100] The zeroing mark e includes a zeroing mark e1 and a right scale adjustment disk e2 and a left scale adjustment disk e3 which are detachably fixed to the two ends of the zeroing mark e1; the outer annular surface of each scale adjustment disk is provided with continuous scale segments e9 with the same arc length but different radii.

[0101] The zeroing mark e1 is mainly used for the value transfer calibration of the length dimension, and it also has the function of loading the scale adjustment disk; the scale adjustment disk is used to accurately adjust the measuring point position and is loaded on both ends of the zeroing mark e1, and the two are detachably connected.

[0102] The calibration method of the concentric measuring point position calibration tool for shaft parts is as follows:

[0103] When the measuring point position adjustment is not required, the engraved adjustment disk is not installed, and the position of the workpiece temperature sensor 6 is adjusted to make it contact any position of the end surface of the large diameter section at both ends of the zeroing mark e1, and the zero position calibration of the workpiece temperature sensor 6 is completed;

[0104] When it is necessary to adjust the measuring point position, the right scale adjustment disk e2 and the left scale adjustment disk e3 are respectively installed on the two ends of the zeroing mark e1. As needed, the workpiece temperature sensor 6 is contacted with the corresponding radius end surface of the scale adjustment disk, and the workpiece temperature sensor 6 is moved in the radial direction. When the measuring range of the workpiece temperature sensor 6 suddenly points to the limit position, it indicates that it has been adjusted into place, and the measuring point position adjustment of the workpiece temperature sensor 6 is completed.

[0105] Preferably, the zeroing mark e1 is a stepped shaft structure, and the end faces of the large diameter sections at both ends of the zeroing mark e1 are calibration surfaces. The zeroing mark e1 is formed by turning and grinding, and the outer circle and end faces of the large diameter sections at both ends are finely ground. When the sensor contacts any position of the calibration surface, the zero position calibration of the workpiece temperature sensor 6 is completed.

[0106] Preferably, the total runout of the end face of the zero mark e1 and the perpendicularity relative to the axis are less than 0.01 mm, so as to ensure the consistency of the axial dimension when used for the zero calibration function.

[0107] Preferably, the engraved adjustment plate is coaxially fixed to the end of the zero setting mark e1 by bolts, and the bolts are used to achieve a detachable connection, which is convenient and quick to disassemble and assemble.

[0108] Preferably, a smooth section is provided at the end of the zeroing mark e1, and the smooth section matches the central through hole e5 of the scaled adjustment disk to load the scaled adjustment disk. A threaded hole is provided on the end face of the zeroing mark e1, and the outer annular surface of the central through hole e5 is provided with uniformly distributed through holes e6, and the uniformly distributed through holes e6 correspond to the threaded holes one by one, respectively, and the fastening screw passes through the uniformly distributed through holes e6 and the threaded holes to fix the scaled adjustment disk to the zeroing mark e1.

[0109] Preferably, the radius of the continuous engraved line segment e9 has an accuracy of 0.01 mm. The engraved line segment is formed by precision electric spark cutting, and the radius processing accuracy is 0.01 mm, and is used to adjust the measurement point position.

[0110] Preferably, the radius difference between two adjacent scale segments of the continuous scale segment e9 is 0.5 mm.

[0111] Preferably, the score adjustment disk is provided with two adjustment areas, the adjustment range of the continuous score segments in the left adjustment area e7 is R to R+2.5 mm, and the adjustment range of the continuous score segments in the right adjustment area e8 is R+3.0 to R+8.0 mm.

[0112] Preferably, the material of the zeroing mark e1 is the same as that of the workpiece to be measured to maintain the same expansion coefficient and improve the measurement accuracy. The end shapes of the zeroing mark e1 and the workpiece to be measured are the same, which can also improve the measurement accuracy.

[0113] The above description is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A non-standard measurement temperature compensation method, characterized in that: The following steps are involved: Step 1, calibrate the temperature compensation coefficient: In the normal room temperature range of 18-30℃, the dimensional changes of the testing equipment body, zeroing standard and the workpiece to be tested are monitored, the temperature expansion coefficient is calculated, the compensation function is fitted, and the compensation curve is generated in the software system; Step 2: Perform three-level temperature compensation: S1, monitoring the temperature change of the equipment. When the temperature difference detected by the two temperature sensors monitoring the main body of the detection equipment is less than 2°C, the temperature of the detection equipment is compensated according to the compensation curve of step 1 to obtain the compensation value δ of the detection equipment under the theoretical measurement environment of 20°C; S2, placing the zeroing mark on the detection position of the detection device body, adjusting the position of the size detection sensor, when it contacts the zeroing mark, the size detection sensor is zeroed, the temperature sensor monitors the temperature change of the zeroing mark, when the temperature difference monitored by the two temperature sensors monitoring the zeroing mark is less than 2°C, the zeroing mark is temperature compensated according to the compensation curve of step 1, and the compensation value δ mark of the zeroing mark under the theoretical measurement environment of 20°C is obtained; S3, remove the zeroing standard, place the workpiece to be measured on the detection position of the detection equipment body, the size detection sensor detects the size L of the workpiece to be measured, and the temperature sensor monitors the temperature change of the workpiece to be measured. When the temperature difference detected by the two temperature sensors monitoring the temperature change of the workpiece to be measured is less than 2°C, the workpiece to be measured is temperature compensated according to the compensation curve of step 1 to obtain the compensation value δworkpiece of the workpiece to be measured under the theoretical measurement environment of 20°C; Step 3, compensate the measured size of the workpiece, Lafter compensation = Lactual measurement + δ equipment + δ standard + δ workpiece, where Lafter compensation is the size of the workpiece after compensation.

2. The non-standard measurement temperature compensation method according to claim 1, characterized in that: In step 1, the dimensional data at different temperatures are fitted into a compensation curve using Minitab data fitting software.

3. The non-standard measurement temperature compensation method according to claim 1, characterized in that: In the step 1, two size detection sensors are correspondingly arranged at the two ends of the workpiece to be measured, and the non-standard measurement temperature compensation method uses a total of four temperature sensors, two of which are arranged on the basic plane of the equipment to monitor the temperature change of the detection equipment body in step S1; Two workpiece temperature sensors are respectively arranged near the two size detection sensors and enter the detection position synchronously therewith, and are used for monitoring the zeroing mark in step S2 and for monitoring the temperature change of the measured part in step S3.

4. The non-standard measurement temperature compensation method according to claim 3, characterized in that: In step 1, the size detection sensor and the workpiece temperature sensor enter or exit the detection position under the action of the micro-adjustment mechanism. The micro-adjustment mechanism includes a slide plate and a driving component for driving the slide plate to enter or exit a measuring position; The size detection sensor is assembled on the slide plate through a micro-slide table; The workpiece temperature sensor is arranged on the slide plate through a propulsion component, and the propulsion component includes a A linear guide rail on the slide, a front slider and a rear slider slidably connected to the linear guide rail, a telescopic guide rod connecting the front slider and the rear slider, and a driving member driving the rear slider to move along the linear guide rail, and the workpiece temperature sensor is fixed on the front slider.

5. The non-standard measurement temperature compensation method according to claim 4, characterized in that: The adjustment method of the sensor fine adjustment mechanism comprises the following steps: Step 1: After the workpiece to be measured is placed, the driving component is started, and under the driving action of the driving component, the slide plate enters the measuring position; Step 2, adjusting the micro-slide table so that the size detection sensor contacts the calibration surface of the zero-setting standard; Step 3, start the driving member, the driving member drives the front slider and the rear slider to move forward at the same time, after the workpiece temperature sensor contacts the workpiece, the driving member continues to drive the rear slider, the retractable guide rod is compressed, and then a thrust is applied to the front slider, so that the workpiece temperature sensor is always in contact with the workpiece to be measured, so as to achieve synchronous measurement of the workpiece size and temperature; In step S2, the dimension detection sensor is set to zero by adjusting the micro-slide table so that the dimension detection sensor fits the zeroing mark. Then, in step S3, the dimension detection sensor detects the dimension of the workpiece to be measured.

6. The non-standard measurement temperature compensation method according to claim 4, characterized in that: The driving assembly comprises a driving cylinder and a connecting seat assembled on the piston rod of the driving cylinder, the connecting seat is fixed on the slide plate, a sliding block is fixed on the bottom of the slide plate, and the sliding block is slidably connected to the slide rail.

7. The non-standard measurement temperature compensation method according to claim 6, characterized in that: The connecting seat is assembled on the piston rod of the driving cylinder through a universal joint.

8. The non-standard measurement temperature compensation method according to claim 4, characterized in that: The driving member is a cylinder, and the piston rod of the cylinder is fixedly connected to the rear sliding block.

9. The non-standard measurement temperature compensation method according to claim 4, characterized in that: The telescopic guide rod includes a connecting rod and a spring sleeved outside the connecting rod, the front end of the connecting rod is fixed on the front slider, the rear end is sleeved on the rear slider, and a limiting piece is fixed at the rear end, and the two ends of the spring are respectively against the front slider and the rear slider.

10. The non-standard measurement temperature compensation method according to claim 4, characterized in that: The workpiece temperature sensor is fixed to the front slider via a first clamping seat. The first clamping seat is an L-shaped structure with a long through slot on its long side. A fastening screw passes through the long through slot to press and fix the first clamping seat to the front slider.

11. The non-standard measurement temperature compensation method according to claim 4, characterized in that: The micro-motion slide is fixed on the slide plate, the dimension detection sensor is assembled on the micro-motion slide through a second clamping seat, and the dimension detection sensor is a dial indicator or a comparator.

12. The non-standard measurement temperature compensation method according to claim 1, characterized in that: The two ends of the zero setting mark are respectively provided with a detachable right scale line adjustment disk and a detachable left scale line adjustment disk; the outer annular surface of each scale line adjustment disk is provided with continuous scale line segments with the same arc length but different radii.

13. The non-standard measurement temperature compensation method according to claim 12, characterized in that: The calibration method of the concentric measuring point position calibration tool for shaft parts is: When the measuring point position adjustment is not required, the engraved adjustment disk is not assembled, and the position of the workpiece temperature sensor is adjusted to make it contact any position of the end surface of the large diameter section at both ends of the zeroing standard to complete the zero position calibration of the workpiece temperature sensor; When it is necessary to adjust the measuring point position, install the right scale adjustment disk and the left scale adjustment disk at the two ends of the zeroing mark respectively, contact the workpiece temperature sensor with the corresponding radius end face of the scale adjustment disk as needed, move the workpiece temperature sensor in the radial direction, and when the measuring range of the workpiece temperature sensor suddenly points to the limit position, it means that it has been adjusted into place and the measuring point position adjustment of the workpiece temperature sensor is completed.

14. The non-standard measurement temperature compensation method according to claim 12, characterized in that: The zeroing mark is a stepped shaft structure, and the end faces of the large diameter sections at both ends of the zeroing mark are calibration surfaces. The zeroing mark is formed by turning and grinding, and the outer circle and end faces of the large diameter sections at both ends are finely ground. When the sensor contacts any position of the calibration surface, the zero position calibration of the workpiece temperature sensor is completed.

15. The non-standard measurement temperature compensation method according to claim 12, characterized in that: The total runout of the end face of the zero-setting mark and the perpendicularity relative to the axis are less than 0.01 mm.

16. The non-standard measurement temperature compensation method according to claim 12, characterized in that: The line adjustment disk is coaxially fixed to the end of the zeroing mark by bolts, and a smooth section is provided at the end of the zeroing mark, and the smooth section matches the central through hole of the line adjustment disk to load the line adjustment disk, and a threaded hole is provided on the end face of the zeroing mark, and the outer annular surface of the central through hole is provided with uniformly distributed through holes, and the uniformly distributed through holes correspond to the threaded holes one by one, and a fastening screw passes through the uniformly distributed through holes and the threaded holes to fix the line adjustment disk to the zeroing mark.

17. The non-standard measurement temperature compensation method according to claim 12, characterized in that: The accuracy of the radius of the continuous engraved line segment is 0.01 mm, and the radius difference between two adjacent scale segments of the continuous engraved line segment is 0.5 mm.

18. The non-standard measurement temperature compensation method according to claim 12, characterized in that: The engraved line adjustment disk is provided with two adjustment areas. The adjustment range of the continuous engraved line segments in the left adjustment area is R to R+2.5 mm, and the adjustment range of the continuous engraved line segments in the right adjustment area is R+3.0 to R+8.0 mm.

19. The non-standard measurement temperature compensation method according to claim 12, characterized in that: The material of the zeroing mark is the same as that of the workpiece to be measured, so as to maintain the same expansion coefficient and improve the measurement accuracy. The end shapes of the zeroing mark and the workpiece to be measured are the same, which can also improve the measurement accuracy.

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