CN103148777A - Connecting rod hole parallelism detecting system and detecting method based on eddy current transducer - Google Patents
Connecting rod hole parallelism detecting system and detecting method based on eddy current transducer Download PDFInfo
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- CN103148777A CN103148777A CN2013100435193A CN201310043519A CN103148777A CN 103148777 A CN103148777 A CN 103148777A CN 2013100435193 A CN2013100435193 A CN 2013100435193A CN 201310043519 A CN201310043519 A CN 201310043519A CN 103148777 A CN103148777 A CN 103148777A
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Abstract
The invention discloses a connecting rod hole parallelism detecting system and detecting method based on an eddy current transducer. The detecting system mainly comprises a positioning system, a drive and transmission system, an information collecting and control system and a data processing system. The connecting rod hole parallelism detecting method based on the eddy current transducer includes the steps: when detection is carried out, firstly initialing the system, then placing a connecting rod to be detected and using the positioning system to enable the connecting rod to be positioned, enabling the eddy current transducer to pass through specified detecting positions in sequence under the control of programmable logic controller process of the drive and transmission system, and collecting an analog quantity signal, a limiting probe on-off signal and a lifting frame position signal, and finally, enabling collected data to be through matching of detected section circle centers, computation of the actual distance of two holes, computation of actual center line error and judgment of computing results to achieve the detection of the connecting rod hole parallelism. The connecting rod hole parallelism detecting system and detecting method based on the eddy current transducer is capable of rapidly and automatically achieving the detection of parallelism of center lines of two holes of a big end and a small end of the connecting rod.
Description
Technical field
The invention belongs to the detection technique field, be specifically related to a kind of detection system and detection method of the engine link concentric reducer two centerline hole depth of parallelisms.
Background technology
Connecting rod connects piston and bent axle as the core force transferring part of engine, the combustion-gas pressure that acts on piston is passed to bent axle, output torque.In the course of the work, connecting rod bears the gas load that piston pin transmits and itself swings and the alternate load the during to-and-fro movement of piston group, the mechanical load weight, and condition of work is abominable.Therefore, very high to the requirement of the structural strength of connecting rod, and the manufacturing accuracy of connecting rod itself directly affects the load state of connecting rod, and then affect the performance of engine.
Directly affect if the depth of parallelism of connecting rod concentric reducer centerline hole does not meet the demands piston pin center line and crankshaft axis the depth of parallelism and with the verticality of cylinder center, make piston produce forward and backward inclination in cylinder and the gap is inconsistent, thereby cause the piston rod group to produce eccentric wear, accelerate the wearing and tearing of parts, can produce scuffing of cylinder bore when serious; Cause the connecting rod distortion, cause and alter oil, gas blowby, engine power is descended, less economical, blowdown increases, and shorten serviceable life; Piston moves irregular in cylinder, and forward and backward waving occurs, and the impingement cylinder wall produces engine knock, causes the engine noise level to raise.
At present, the detection method of the common connecting rod concentric reducer center pit center line depth of parallelism roughly has: use dedicated gauge and mechanical type inspection jig, pure manual or automanual detection, such as " pick-up unit of link parallelism " of Taizhou Hongxin Crankshaft Co., Ltd research and development etc., the general complicated operation of these class methods, efficient are low, and measuring accuracy also is subject to the impact of many subjective factors, not only are difficult to realize the full inspection when typical products in mass production is produced, and flase drop easily appears, produce waste; Be the method that adopts the general general measuring instrument such as three-coordinates measuring machine to detect in addition, this method testing cost is very high, and efficient is lower.Adopt in addition measuring method, but because optical measurement is had relatively high expectations to measured surface on the one hand, on the other hand prism itself and moving guide rail thereof are had relatively high expectations, also be not suitable for the measurement tie rod holes; " the intelligent linkage measuring system " of high dawn of the Jing of Beijing Jiaotong University design, although realized automatic measurement, the restriction of quantity but its measurement point is popped one's head in, and self size of sensor has determined that it is not suitable for the less occasions in concentric reducer center pit aperture such as general vapour, diesel motor connecting rod.
Summary of the invention
The objective of the invention is in order to overcome above-mentioned deficiency for general vapour, diesel motor connecting rod concentric reducer centerline hole Parallel testing, disclose a kind of detection system that can the fast automatic measurement connecting rod concentric reducer two centerline hole depth of parallelisms.
Technical scheme of the present invention is:
Detection system based on the current vortex sensor tie rod holes depth of parallelism is characterized in that: this measuring system comprises positioning system, driving and gearing, information acquisition control system and data handling system, wherein:
Described positioning system comprises test desk, test desk support, V-arrangement locating piece, register pin, positioning adapter, location and trip bolt; The test desk of described positioning system is by the test desk stent support, and the V-arrangement locating piece is fixed on the left of test desk, and the center line of its V-arrangement locating piece overlaps with the horizontal center line of test desk; Register pin is fixed in the test desk upper right side; Positioning adapter is fixed in the test desk hole by two groups of location, trip bolts;
Described driving, gearing comprise that drive motor, driving gear, stub end jacking gear, microcephaly hold jacking gear, stub end follower gear, microcephaly to hold follower gear, tooth bar, stub end spring bearing, microcephaly to hold spring bearing, rack frame, left limit probe, right limit probe; Drive motor is arranged in the middle of two holes of test desk, main tooth driving wheel is arranged on the output shaft of drive motor, and large and small head end jacking gear and centre, large and small head end jacking gear and be individually fixed in test desk two holes under, large and small head end spring bearing is arranged on respectively on large and small head end jacking gear, stub end follower gear and microcephaly hold follower gear to be arranged on respectively on large and small head end spring bearing, rack frame fixes on the ground, tooth bar is close to rack frame, tooth bar and main tooth driving wheel and the engagement of large and small head end follower gear; Left limit probe and right limit are popped one's head in and are individually fixed in limit on the left that tooth bar moves and limit on the right-right-hand limit position; Tooth bar is supported by rack frame;
Described information acquisition control system is comprised of information collecting device and programmable controller program, and information collecting device comprises that stub end current vortex sensor, stub end current vortex sensor, large head bracket, little head bracket, stub end jacking gear, microcephaly hold jacking gear, Programmable Logic Controller and computing machine; Large and small two end supports of information acquisition control system are through at respectively in positioning adapter, and large and small end current vortex sensor is placed respectively in the upper end, and the lower end is placed on large and small head end jacking gear; Spacing probe, drive motor are connected with Programmable Logic Controller, large and small end current vortex sensor accesses respectively the input end of programmable controller analog quantity by its supporting front end, large and small head end jacking gear is connected with Programmable Logic Controller, and the computing machine that Programmable Logic Controller connects is realized the startup of information acquisition control system and reads measurement data by programmable controller program;
Described data handling system comprises that measured section center of circle match, two hole actual distance calculation, actual center line error are calculated and result of calculation is judged four parts.
Use the tie rod holes Parallel testing method of said detecting system, adopt following steps to realize the Parallel testing of tie rod holes:
1) system initialization: support is down to minimum altitude, and large and small end current vortex sensor is in respectively 0 ° of position, and tooth bar is in the limit on the left position;
2) place tested connecting rod: tested connecting rod is placed on test desk, and the microcephaly is close to the V-arrangement locating piece, and the major part side is close to register pin.Check large and small end electric vortex sensor measuring head and two hole tested surface spacings, if exceeded its linearity measuring range, adjust the fixed position of large and small end current vortex sensor on support its measuring head and two hole tested surface spacings are in its linearity measuring range scope;
3) sensor image data: after two elevating brackets rose to respectively the low measurement position in two holes, drive motor is forward at the uniform velocity, and tooth bar begins to move to right; Large and small end current vortex sensor begins rotation from 0 ° of position separately, and measures, and measurement data is transferred to computing machine and preserves by PLC; When tooth bar moves to the limit on the right-right-hand limit position, the sudden change of right limit probe signal; The drive motor stall, this moment, large and small end current vortex sensor was in 360 ° of positions separately; Elevating bracket rises to the high measurement position; Motor at the uniform velocity reverses, and tooth bar moves to left, and large and small end current vortex sensor is measured; Tooth bar moves to the limit on the left position, the sudden change of left limit probe signal, and large and small end current vortex sensor is got back to 0 ° of position separately; Motor stalling; Elevating bracket is got back to extreme lower position;
4) data are processed: large, the small end current vortex sensor with measuring-signal by front end and PLC, signal is carried out rectification, filtering, amplify, input computing machine after the A/D conversion, input quantity be measurement point and theoretical center apart from r, if the rotational speed of drive motor is V, rotation time is T, can draw this measurement point angle θ of living in, and then obtain this point coordinate (r, θ), use least square method to carry out measured section center of circle match to the point in same measurement cross section, obtain the home position of this measurement face, again by two home positions in big end hole, obtain the big end hole actual center line, by calculating microcephaly hole two measurement points to the distance of this straight line, calculate the actual range in two holes, two hole actual ranges are compared with the design centre linear distance respectively, completing the actual center line error calculates, and compare with the design limits of error, judge result of calculation, finally realize the detection of the tie rod holes depth of parallelism.
The significant beneficial effect of the present invention is the measurement that can realize quickly and automatically the connecting rod concentric reducer two centerline hole depth of parallelisms.
Description of drawings
Fig. 1 is the wiring layout of positioning system of the present invention, driving and kinematic train and information collecting device.
Fig. 2 is A-A cut-open view in Fig. 1 of the present invention.
Fig. 3 is that schematic diagram is controlled in information acquisition of the present invention.
Fig. 4 is measurement procedure figure of the present invention.
Fig. 5 is physical parameter schematic diagram in measuring process of the present invention.
the tested connecting rod of each parts: 1-shown in Fig. 1, the 2-microcephaly holds current vortex sensor, the little head bracket of 3-, the large head bracket of 4-, 5-stub end current vortex sensor, the 6-positioning adapter, the 7-rack frame, the 8-location, trip bolt, 9-left limit probe, the 10-tooth bar, the 11-microcephaly holds follower gear, 12-V shape locating piece, the 13-microcephaly holds jacking gear, the 14-microcephaly holds spring bearing, the 15-driving gear, the 16-drive motor, the 17-test desk, 18-stub end follower gear, 19-stub end jacking gear, the 20-register pin, 21-stub end spring bearing, 22-test desk support, 23-right limit probe.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Tie rod holes measurement of paralleism system based on current vortex sensor is comprised of positioning system, driving and kinematic train, information acquisition control system, data handling system four sub-systems, and wherein, information acquisition control system comprises information collecting device and PLC program.
1. the hardware of measuring system forms
As shown in Figure 1, positioning system is comprised of test desk 17, test desk support 22, V-arrangement locating piece 12, register pin 20, positioning adapter 6, location, trip bolt 8.Test desk 17 is supported by test desk support 22, V-arrangement locating piece 12 is fixed on test desk 17 left sides, its center line overlaps with the test desk horizontal center line, register pin 20 is fixed in test desk 17 upper right side, during measurement, tested connecting rod 1 is placed on test desk 17, and connecting rod 1 microcephaly's outside surface is close to V-arrangement locating piece 12, connecting rod 1 major part is close to register pin 20, in order to determine the relative position of tested connecting rod and test desk; Positioning adapter 6 is individually fixed in the measured hole of test desk 17 by two groups of location, trip bolts 8, and every group comprises three location, trip bolt 8,120 °, interval, and large aperture adds up to 4 groups totally 12, to determine the relative position of lining center line and test desk 17; Be processed with two holes on test desk 17, the center line in two holes overlaps with the theoretical centerline in connecting rod 1 liang of hole respectively, and then has determined the relative position of tested connecting rod 1, test desk 17, positioning adapter 6.
As depicted in figs. 1 and 2, described driving, gearing comprise that drive motor 16, driving gear 15, large and small head end jacking gear 19 and 13, stub end follower gear 18, microcephaly hold follower gear 11, tooth bar 10, stub end spring bearing 21, microcephaly to hold spring bearing 14, rack frame 7, left limit probe 9, right limit probe 23; Described drive motor is arranged in the middle of two holes of test desk, driving gear is arranged on the output shaft of drive motor 16, be positioned in the middle of large and small head end jacking gear, large and small head end jacking gear be individually fixed in test desk 17 liang of holes under, the microcephaly holds spring bearing and stub end spring bearing to be arranged on respectively on large and small head end jacking gear, large and small head end follower gear is arranged on respectively on large and small head end spring bearing, rack frame fixes on the ground, tooth bar is close to rack frame, tooth bar and driving gear and the engagement of large and small head end follower gear; Tooth bar and driving gear and the engagement of large and small head end follower gear; Left limit probe and right limit are popped one's head in and are individually fixed in limit on the left that tooth bar moves and limit on the right-right-hand limit position; Tooth bar is supported by rack frame, and two rack frames are placed between large and small head end jacking gear.
Described drive motor drives driving gear and rotates and drive tooth bar and move, and tooth bar is only done the translation of left and right directions, and drives large and small head end follower gear and synchronously rotate.Rack frame guarantees tooth bar and the engagement of large and small head end follower gear well, firm supporting and stable.
described information collecting device is held current vortex sensor 2 by the microcephaly, stub end current vortex sensor 5, microcephaly's support 3, large head bracket 4, microcephaly's lifting support 13, major part lifting support 19, Programmable Logic Controller and computing machine form, concentric reducer two end supports 4 and 5 are through at respectively in positioning adapter, place respectively greatly the upper end, small end current vortex sensor 5 and 2, the lower end is placed on greatly, the microcephaly holds jacking gear 19, on 13, concentric reducer two end supports 4 are held follower gear 11 to be connected with the stub end follower gear with the microcephaly with the lower end of being connected respectively by key to be connected, move and rotate with tooth bar.Left and right spacing probe 9
Left and right spacing probe 9 with are connected, drive motor 16 is connected with Programmable Logic Controller, the microcephaly holds current vortex sensor 2 and stub end current vortex sensor 5 to access respectively the input end of programmable controller analog quantity by its supporting front end, the microcephaly holds jacking gear 13 and stub end jacking gear 19 to be commercial means, carrying interface RS232 by it is connected with Programmable Logic Controller, Programmable Logic Controller can control its lifting for large and small head end jacking gear 19 and 13 transmitted signals, and Programmable Logic Controller is connected with computing machine.
2. the Installation and Debugging of measuring system
Based on need to be customized according to the size of tested connecting rod except test desk in the required part of tie rod holes measurement of paralleism system of current vortex sensor, other parts be all measured applicable to the connecting rod of most of specification.Installation method is as follows:
Install respectively lower two groups of location, trip bolt 8 on test desk below measured hole 17,3 every group, 120 °, interval, large aperture adds up to 4 groups totally 12.Adjust the location, the trip bolt 8 that are used for the stationary positioned lining on test desk 17, guarantee respectively two positioning adapters 6 and the verticality of test desk supporting surface and the depth of parallelism of two positioning adapter center lines, the distance of the center line of positioning adapter 6 and V-arrangement locating piece 12, register pin 20 satisfies accuracy requirement; Large and small head bracket 3,4 passes positioning adapter 6 and is positioned over respectively on large and small head end jacking gear 19,13 respectively with after large and small head end follower gear 18,11 is connected by key, and guarantees that support can smooth rotation.Large and small head end current vortex sensor 5,2 measuring head are separately fixed at large and small head end jacking gear 13,19 upper brace edges, and measuring junction is slightly outstanding; The cable that connects large and small head end current vortex sensor is worn by the through hole of large and small head end jacking gear 19,13 heads respectively, connecting the microcephaly holds the data line of current vortex sensor 2 to walk around from the downside of microcephaly's support 3, the data line that connects stub end current vortex sensor 5 is walked around from the top of large head bracket 4, be fixed in the deep gouge of test desk 17 after staying suitable length, finally input respectively large and small head end current vortex sensor front end.
Adjust the position of tooth bar 10, the gear 18 that its right-hand member is connected near big end jacking gear 19, the high order end of determining tooth bar 10 is left end limit of sports record position; The driving tooth bar moves right, and large and small head end jacking gear is rotated a circle, and determines that the tooth bar low order end is the limit on the right-right-hand limit position; Spacing probe 9 and 23 are placed respectively by the place at two limit positions.Two rack frames are placed between large and small head end jacking gear, guarantee that the rack and pinion engagement is good, and firm supporting is stable.Driving gear is directly installed on the output shaft of drive motor 16, and is arranged in the middle of large and small head end jacking gear.
During the commissioning examination, drive motor 16 moves by the gear driven tooth bar, drives simultaneously two engaged wheels and rotates, and support rotates thereupon.When tooth bar was motionless, large and small head end jacking gear carried out respectively elevating movement, and support moves up and down with large and small head end jacking gear under the constraint of positioning adapter.Guarantee between positioning adapter and support, lubricated good between rack-and-pinion, system operates steadily.
At the extreme position at tooth bar 10 two ends, left limit probe 9 and right limit probe 23 are installed respectively.When tooth bar was positioned at the limit on the left position, large and small head end current vortex 5,2 sensors residing position were respectively thought its initial position separately, are designated as 0 ° of position, triggered the left limit probe this moment; Drive motor 16 forward band carry-over bars move right, and when large and small head end current vortex 5, the 2 all final positions of sensor rotation one, are designated as 360 ° of positions, trigger right limit probe 23 this moment.In like manner, drive motor 16 counter-rotating, triggers left limit probe 9 again at large and small head end current vortex 5 when 2 sensors are got back to 0 ° of position.Like this, not only determined large and small head end current vortex 5,2 sensor present positions, and guaranteed that rack and pinion keeps engagement good.
3. the data acquisition of measuring system
When large and small head end current vortex sensor 5,2 is in respectively as shown in Figure 1 the position, think its initial position separately, corresponding angle is 0 °, trigger left limit probe 9 this moment, drive motor 16 main storys, move right by gear 15 band carry-over bars 10, drive simultaneously two engaged wheels 11,18 and rotate, support 3,4 rotates thereupon; When large and small head end current vortex sensor 5,2 rotate a circle reach 360 ° of positions after, trigger right limit probe 23, drive motor 16 counter-rotatings, large and small head end current vortex sensor 5,2 triggers left limit probe 9 again when getting back to 0 ° of position; When tooth bar was motionless, large and small head end jacking gear 13,19 carried out respectively elevating movement, and support 3,4 moves up and down with jacking gear under the constraint of positioning adapter 6, guaranteed between positioning adapter and support, and lubricated good between rack-and-pinion, system operates steadily.
The data acquisition of measuring system is as shown in Figure 3 and Figure 4:
1) system initialization is down to minimum altitude with support 3,4, and large and small head end current vortex sensor 5,2 is in respectively position as shown in Figure 1, and is defaulted as 0 °, and at this moment, tooth bar 10 left ends are in the limit on the left position.
2) place tested connecting rod connecting rod 1 is placed on test desk 17, the microcephaly is close to V-arrangement locating piece 12, and the major part side is close to register pin 20.Check that large and small head end current vortex sensor 5,2 measuring heads and two holes are in its linearity measuring range by the side spacing, otherwise adjust the fixed position of large and small head end current vortex sensor 5,2 on support.
3) sensor image data two elevating brackets 13,19 rise to respectively the low measurement position H in two holes
p1, H
q1, as shown in Figure 4.Drive motor 16 is forward at the uniform velocity, and tooth bar begins to move to right, and large and small head end current vortex sensor 5,2 begins to rotate and measure from initial angle (0 °), and measurement data is transferred to computing machine and preserves by Programmable Logic Controller PLC.When tooth bar 10 right-hand members reach the limit on the right-right-hand limit position, right limit probe 23 sign mutations, drive motor 16 stalls.Large and small head end jacking gear 13,19 rises to high measurement position H
p2, H
q2Drive motor 16 at the uniform velocity reverses; When tooth bar 10 left ends reached the limit on the left position, left limit probe 9 sent signal, drive motor 16 stalls.Elevating bracket returns extreme lower position H
p0, H
q0
4. the data of measuring system are processed
Rotational speed V, the minimum altitude H that the microcephaly holds jacking gear of the default drive motor of PC end
p0, the low position height H of measuring
p1, high measurement position height H
p2, the stub end jacking gear minimum altitude H
q0, the low position height H of measuring
q1, high measurement position height H
q2
1) each current vortex sensor of the survey center of circle, cross section match rotates a circle and can obtain one group of coordinate data.At first these group data are carried out coordinate transform, with the coordinate figure of each point under the polar coordinate system change in location meets at right angles coordinate system.According to rotational speed V, rotation time T and measurement point and theoretical center apart from r, obtain a current vortex sensor corresponding one group of coordinate position (r, θ) that rotates a circle, use the least square fitting should measurement face home position (x
0, y
0) and corresponding radius R.Obtain respectively microcephaly hole H
p1Measurement face center of circle P
1, H
p2Measurement face center of circle P
2, big end hole H
q1Measurement face center of circle Q
1, H
q2Measurement face center of circle Q
2
2) two hole actual distance calculation are measured face center of circle Q by big end hole two
1, Q
2Determine big end hole center line l
q, calculate respectively microcephaly hole two center of circle P
1, P
2To l
qApart from d
1, d
2, namely obtain the actual range of two centerline holes in high and low two measured sections in microcephaly hole.
3) be d if the actual center line error is calculated the design centre linear distance in two holes
s, think absolute error δ=| d-d
s|, substitution d
1, d
2Calculate δ
1, δ
2, i.e. two centerline hole errors in high and low two measured sections in microcephaly hole.
4) result of calculation judges that the accuracy requirement that provides according to design calculates limits of error δ
maxIf δ
1≤ δ
max, δ
2≤ δ
max, think and satisfy the design accuracy requirement, otherwise do not meet designing requirement.
Input quantity be measurement point and theoretical center apart from r.If the rotational speed of drive motor is V, rotation time is T, can draw this measurement point angle θ of living in, and then obtains this point coordinate (r, θ).
Claims (2)
1. based on the detection system of the current vortex sensor tie rod holes depth of parallelism, it is characterized in that: this measuring system comprises positioning system, driving and gearing, information acquisition control system and data handling system, wherein:
Described positioning system comprises test desk, test desk support, V-arrangement locating piece, register pin, positioning adapter, location and trip bolt; The test desk of described positioning system is by the test desk stent support, and the V-arrangement locating piece is fixed on the left of test desk, and the center line of its V-arrangement locating piece overlaps with the horizontal center line of test desk; Register pin is fixed in the test desk upper right side; Positioning adapter is fixed in the test desk hole by two groups of location, trip bolts;
Described driving, gearing comprise that drive motor, driving gear, stub end jacking gear, microcephaly hold jacking gear, stub end follower gear, microcephaly to hold follower gear, tooth bar, stub end spring bearing, microcephaly to hold spring bearing, rack frame, left limit probe, right limit probe; Drive motor is arranged in the middle of two holes of test desk, driving gear is arranged on the output shaft of drive motor, and large and small head end jacking gear and centre, large and small head end jacking gear and be individually fixed in test desk two holes under, large and small head end spring bearing is arranged on respectively on large and small head end jacking gear, stub end follower gear and microcephaly hold follower gear to be arranged on respectively on large and small head end spring bearing, rack frame fixes on the ground, tooth bar is close to rack frame, tooth bar and driving gear and the engagement of large and small head end follower gear; Left limit probe and right limit are popped one's head in and are individually fixed in limit on the left that tooth bar moves and limit on the right-right-hand limit position; Tooth bar is supported by rack frame;
Described information acquisition control system is comprised of information collecting device and programmable controller program, and information collecting device comprises that stub end current vortex sensor, stub end current vortex sensor, large head bracket, little head bracket, stub end jacking gear, microcephaly hold jacking gear, Programmable Logic Controller and computing machine; Large and small two end supports of information acquisition control system are through at respectively in positioning adapter, and large and small end current vortex sensor is placed respectively in the upper end, and the lower end is placed on large and small head end jacking gear; Spacing probe, drive motor are connected with Programmable Logic Controller, large and small end current vortex sensor accesses respectively the input end of programmable controller analog quantity by its supporting front end, large and small head end jacking gear is connected with Programmable Logic Controller, and the computing machine that Programmable Logic Controller connects is realized the startup of information acquisition control system and reads measurement data by programmable controller program;
Described data handling system comprises that measured section center of circle match, two hole actual distance calculation, actual center line error are calculated and result of calculation is judged four parts.
2. the detection method of the measuring system based on the current vortex sensor tie rod holes depth of parallelism according to claim 1, is characterized in that, adopts following steps to realize the tie rod holes Parallel testing:
1) system initialization: support is down to minimum altitude, and large and small end current vortex sensor is in respectively 0 ° of position, and tooth bar is in the limit on the left position;
2) place tested connecting rod: tested connecting rod is placed on test desk, and the microcephaly is close to the V-arrangement locating piece, and the major part side is close to register pin; Check large and small end electric vortex sensor measuring head and two hole tested surface spacings, if exceeded its linearity measuring range, adjust the fixed position of large and small end current vortex sensor on support its measuring head and two hole tested surface spacings are in its linearity measuring range scope;
3) sensor image data: after two elevating brackets rose to respectively the low measurement position in two holes, drive motor is forward at the uniform velocity, and tooth bar begins to move to right; Large and small end current vortex sensor begins rotation from 0 ° of position separately, and measures, and measurement data is transferred to computing machine and preserves by PLC; When tooth bar moves to the limit on the right-right-hand limit position, the sudden change of right limit probe signal; The drive motor stall, this moment, large and small end current vortex sensor was in 360 ° of positions separately; Elevating bracket rises to the high measurement position; Motor at the uniform velocity reverses, and tooth bar moves to left, and large and small end current vortex sensor is measured; Tooth bar moves to the limit on the left position, the sudden change of left limit probe signal, and large and small end current vortex sensor is got back to 0 ° of position separately; Motor stalling; Elevating bracket is got back to extreme lower position;
4) data are processed: large, the small end current vortex sensor with measuring-signal by front end and PLC, signal is carried out rectification, filtering, amplify, input computing machine after the A/D conversion, input quantity be measurement point and theoretical center apart from r, if the rotational speed of drive motor is V, rotation time is T, can draw this measurement point angle θ of living in, and then obtain this point coordinate (r, θ), use least square method to carry out measured section center of circle match to the point in same measurement cross section, obtain the home position of this measurement face, again by two home positions in big end hole, obtain the big end hole actual center line, by calculating microcephaly hole two measurement points to the distance of this straight line, calculate the actual range in two holes, two hole actual ranges are compared with the design centre linear distance respectively, completing the actual center line error calculates, and compare with the design limits of error, judge result of calculation, finally realize the detection of the tie rod holes depth of parallelism.
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| CN108663009A (en) * | 2018-05-16 | 2018-10-16 | 大连大学 | The even parallelism error measurement method of the assigned direction relative datum element axis of component of rod category |
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| CN113739743A (en) * | 2021-09-07 | 2021-12-03 | 无锡万奈特测量设备有限公司 | Automatic measuring machine for connecting rod |
| CN116625280A (en) * | 2023-07-26 | 2023-08-22 | 中国汽车技术研究中心有限公司 | Collision dummy shoulder joint rotating shaft parallelism and coaxiality measuring tool and measuring method |
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| CN104534051A (en) * | 2014-12-22 | 2015-04-22 | 重庆泉海机械有限责任公司 | Gear link mechanism for workpiece inner hole surface detection |
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| CN107246839A (en) * | 2017-07-03 | 2017-10-13 | 西安爱生技术集团公司 | A kind of SUAV engine link comprehensive detection and industrial analysis system |
| CN108663009A (en) * | 2018-05-16 | 2018-10-16 | 大连大学 | The even parallelism error measurement method of the assigned direction relative datum element axis of component of rod category |
| CN110954044A (en) * | 2019-11-27 | 2020-04-03 | 广东四会实力连杆有限公司 | Connecting rod detection method |
| CN110954044B (en) * | 2019-11-27 | 2022-01-25 | 广东四会实力连杆有限公司 | Connecting rod detection method |
| CN112525069A (en) * | 2020-11-18 | 2021-03-19 | 厦门物之联智能科技有限公司 | Internet of things big data acquisition and processing system capable of guaranteeing accuracy |
| CN113739743A (en) * | 2021-09-07 | 2021-12-03 | 无锡万奈特测量设备有限公司 | Automatic measuring machine for connecting rod |
| CN113739743B (en) * | 2021-09-07 | 2022-06-21 | 无锡万奈特测量设备有限公司 | Automatic measuring machine for connecting rod |
| CN116625280A (en) * | 2023-07-26 | 2023-08-22 | 中国汽车技术研究中心有限公司 | Collision dummy shoulder joint rotating shaft parallelism and coaxiality measuring tool and measuring method |
| CN116625280B (en) * | 2023-07-26 | 2023-10-10 | 中国汽车技术研究中心有限公司 | Collision dummy shoulder joint rotating shaft parallelism and coaxiality measuring tool and measuring method |
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