CN108168499A - A kind of measuring for the coaxiality error method and measuring system - Google Patents

A kind of measuring for the coaxiality error method and measuring system Download PDF

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Publication number
CN108168499A
CN108168499A CN201711461191.1A CN201711461191A CN108168499A CN 108168499 A CN108168499 A CN 108168499A CN 201711461191 A CN201711461191 A CN 201711461191A CN 108168499 A CN108168499 A CN 108168499A
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China
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workpiece
shaft
fitting
data acquisition
relationship data
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CN201711461191.1A
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CN108168499B (en
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兰太吉
李俊霖
袁理
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Changchun Optical Precision Instrument Group Co Ltd
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Changchun Optical Precision Instrument Group Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups
    • G01B21/22Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups for measuring angles or tapers; for testing the alignment of axes
    • G01B21/24Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups for measuring angles or tapers; for testing the alignment of axes for testing alignment of axes

Abstract

This application discloses a kind of measuring for the coaxiality error method and measuring systems, wherein, the measuring for the coaxiality error method is when measuring coaxiality error, only need the measurement of the position relationship data acquisition system by laser measuring equipment realization shaft-like workpiece different cross section, shaft-like workpiece is measured without the amount instrument and contact formula weight instrument of customization, not only avoid the possibility that shaft-like workpiece is scratched in measurement process, and measurement process is easy, so as to improve the measurement efficiency of the coaxiality error of shaft-like workpiece.

Description

A kind of measuring for the coaxiality error method and measuring system
Technical field
This application involves shaft-like workpiece geometric measurement technical fields, are surveyed more specifically to a kind of coaxiality error Amount method and measuring system.
Background technology
In mechanical industry precision manufactureing field, the processing of shaft-like workpiece and detection are one and important and complicated ask always Topic.For certain angle, the accuracy of detection in shaft-like workpiece manufacturing process inversely constrains machining accuracy.Improve its online inspection Survey ability and then guarantee processing quality, have great importance for the development for pushing shaft-like workpiece manufacture level.
According to incompletely statistics, China produces the total amount of axial workpiece per year at 1,000,000,000 or so, but particularly high in international market Competitiveness is extremely limited in the axis class market of end, and demand of the industry integrally to advanced quality testing means is very urgent.At present, The manufacturer of shaft-like workpiece is in the coaxiality error for detecting shaft-like workpiece, it usually needs is customized for specific shaft-like workpiece Special amount instrument, not only measurement process is cumbersome, and it also requires frequently replacing survey tool in measurement process, is especially using Also there is the possibility for scratching shaft-like workpiece when contact formula weight instrument measures, the degree of automation is relatively low, restricts shaft-like workpiece Coaxiality error measurement efficiency further promotion.
Invention content
In order to solve the above technical problems, this application provides a kind of measuring for the coaxiality error method and measuring system, with reality Now promote the purpose of the measurement efficiency of the coaxiality error of shaft-like workpiece.
To realize the above-mentioned technical purpose, the embodiment of the present application provides following technical solution:
A kind of measuring for the coaxiality error method realizes, the laser measuring equipment includes based on laser measuring equipment:Control Equipment, stepping equipment, slewing, angular coding equipment and measurement device of diameter;Wherein, the slewing is used for installation axle Class workpiece, and shaft-like workpiece is driven to be rotated in preset level face, the angular coding equipment is being revolved for defining shaft-like workpiece Relative zero during transhipment is dynamic, and the angle pulse according to control device transmission acquires the shaft-like workpiece in each rotation Angle-data corresponding to angle;The stepping equipment is used for the stepping pulse signal transmitted according to the control device, drives Measurement device of diameter is moved along the extending direction of shaft-like workpiece, so that the measurement device of diameter measures shaft-like workpiece different cross section First end point position and the second endpoint location at position;The control device is used to send step-by-step impulse to the stepping equipment Signal sends angle pulse signal to the slewing, to control the movement of the stepping equipment, slewing, and receives The data that the angular coding equipment and measurement device of diameter measure obtain shaft-like workpiece section in different rotary angle and its institute The position relationship data acquisition system of corresponding radial direction endpoint;The measuring for the coaxiality error method includes:
At the sectional position of the shaft-like workpiece, obtain with the section in different rotary angle and its corresponding diameter To the position relationship data acquisition system of endpoint;
According to the position relationship data acquisition system, the point midway that fitting obtains the position relationship data acquisition system is corresponding It is fitted sine curve;
According to the sinusoidal crest location of the fitting and wave trough position, calculate and obtain the center of circle corresponding with the section Jerk value;
According to the corresponding center of circle jerk value in multiple and different sectional positions of the shaft-like workpiece, the shaft-like workpiece is determined Coaxiality error.
Optionally, it is described according to the sinusoidal crest location of the fitting and wave trough position, it calculates and obtains and described section The corresponding center of circle jerk value in face includes:
Obtain the value of the sinusoidal crest location of the fitting and wave trough position;
The value of the sinusoidal crest location of the fitting and wave trough position is substituted into preset formula, calculate obtain with The corresponding center of circle jerk value in the section;
The preset formula is:T=Y1-Y2, wherein, T is center of circle jerk value, and Y1 represents to be fitted sinusoidal wave crest position The value put, Y2 represent to be fitted the value of sinusoidal wave trough position.
Optionally, it is described according to the section in different rotary angle and its position relationship number of corresponding radial direction endpoint According to set, the corresponding fitting sine curve of point midway that fitting obtains the position relationship data acquisition system includes:
According to the first end point position of the position relationship data acquisition system of acquisition and the second endpoint location, the midpoint of the two is calculated Point midway as the position relationship data acquisition system;
According to the point midway of the position relationship data acquisition system, it is fitted in acquisition and the position relationship data acquisition system The corresponding fitting sine curve in point position.
Optionally, the corresponding center of circle jerk value in multiple and different sectional positions according to the shaft-like workpiece, determines institute The coaxiality error for stating shaft-like workpiece includes:
By the maximum value in the corresponding center of circle jerk value in multiple and different sectional positions of the shaft-like workpiece, as the axis The coaxiality error of class workpiece.
A kind of measuring for the coaxiality error system realizes, the laser measuring equipment includes based on laser measuring equipment:Control Equipment, stepping equipment, slewing, angular coding equipment and measurement device of diameter;Wherein, the slewing is used for installation axle Class workpiece, and shaft-like workpiece is driven to be rotated in preset level face, the angular coding equipment is being revolved for defining shaft-like workpiece Relative zero during transhipment is dynamic, and the angle pulse according to control device transmission acquires the shaft-like workpiece in each rotation Angle-data corresponding to angle;The stepping equipment is used for the stepping pulse signal transmitted according to the control device, drives Measurement device of diameter is moved along the extending direction of shaft-like workpiece, so that the measurement device of diameter measures shaft-like workpiece different cross section First end point position and the second endpoint location at position;The control device is used to send step-by-step impulse to the stepping equipment Signal sends angle pulse signal to the slewing, to control the movement of the stepping equipment, slewing, and receives The data that the angular coding equipment and measurement device of diameter measure obtain shaft-like workpiece section in different rotary angle and its institute The position relationship data acquisition system of the position relationship data acquisition system of corresponding radial direction endpoint;The measuring for the coaxiality error system packet It includes:
Data acquisition module, at the sectional position of the shaft-like workpiece, obtaining and the position relationship data set It closes;
Curve fitting module, for according to the position relationship data acquisition system, fitting to obtain the position relationship data set The corresponding fitting sine curve of point midway of conjunction;
First computing module, for according to the sinusoidal crest location of the fitting and wave trough position, calculate obtain with The corresponding center of circle jerk value in the section;
Second computing module, for the corresponding center of circle jerk value in multiple and different sectional positions according to the shaft-like workpiece, Determine the coaxiality error of the shaft-like workpiece.
Optionally, first computing module includes:
Reading cell, for obtaining the value of the sinusoidal crest location of the fitting and wave trough position;
Computing unit, for the value of the sinusoidal crest location of the fitting and wave trough position to be substituted into preset formula In, it calculates and obtains the center of circle corresponding with section jerk value;
The preset formula is:T=Y1-Y2, wherein, T is center of circle jerk value, and Y1 represents to be fitted sinusoidal wave crest position The value put, Y2 represent to be fitted the value of sinusoidal wave trough position.
Optionally, the curve fitting module includes:
Mid-point computation unit, for the first end point position and the second endpoint position of the position relationship data acquisition system according to acquisition It puts, calculates point midway of the midpoint of the two as the position relationship data acquisition system;
Fitting unit, for the point midway according to the position relationship data acquisition system, fitting is obtained closes with the position It is the corresponding fitting sine curve of point midway of data acquisition system.
Optionally, second computing module is specifically used for, and multiple and different sectional positions of the shaft-like workpiece are corresponded to Center of circle jerk value in maximum value, the coaxiality error as the shaft-like workpiece.
It can be seen from the above technical proposal that the embodiment of the present application provides a kind of measuring for the coaxiality error method and measurement System, wherein, the measuring for the coaxiality error method is right in different rotary angle and its institute in acquisition and the section of shaft-like workpiece The position relationship data acquisition system for the radial direction endpoint answered, according to the position relationship data acquisition system, fitting obtains the position relationship The corresponding fitting sine curve of point midway of data acquisition system, the fitting sine curve correspond to the fitting circle at the sectional position The center of circle different rotary angle around shaft-like workpiece common reference axis movement locus, therefore, can be according to the fitting Sinusoidal crest location and wave trough position calculate the center of circle jerk value for obtaining fitting circle corresponding with the sectional position;Finally By comparing the corresponding center of circle jerk value in multiple and different sectional positions of the shaft-like workpiece, the coaxial of the shaft-like workpiece is determined Spend error.The measuring for the coaxiality error method is when measuring coaxiality error, it is only necessary to realize axis by laser measuring equipment The measurement of the position relationship data acquisition system of class workpiece different cross section, without customization amount instrument and contact formula weight instrument to axis class work Part measures, and the possibility that shaft-like workpiece is scratched in measurement process is not only avoided, and measurement process is easy, so as to be promoted The measurement efficiency of the coaxiality error of shaft-like workpiece.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or it will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of application, for those of ordinary skill in the art, without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is the flow diagram of a kind of measuring for the coaxiality error method that one embodiment of the application provides;
Fig. 2 is the schematic diagram of the frame structure of a kind of laser measuring equipment that one embodiment of the application provides;
Fig. 3 is the structure diagram of a kind of measurement device of diameter that one embodiment of the application provides;
Fig. 4 is the schematic diagram of measurement device of diameter calibration process that one embodiment of the application provides;
Fig. 5 is the schematic diagram of measurement device of diameter measurement process that one embodiment of the application provides;
Fig. 6 is the model schematic of a kind of measurement device of diameter measurement data that one embodiment of the application provides;
Fig. 7 is the cross-sectional view of a kind of shaft-like workpiece that one embodiment of the application provides;
Fig. 8 is a kind of signal that common reference axis is established by extraction center line that one embodiment of the application provides Figure;
Fig. 9 (a) is the schematic diagram of a kind of datum axis that one embodiment of the application provides;
Fig. 9 (b) is the relation schematic diagram of a kind of datum axis and extraction center line that one embodiment of the application provides;
Figure 10 is the flow diagram of a kind of measuring for the coaxiality error method that another embodiment of the application provides;
Figure 11 is the flow diagram of a kind of measuring for the coaxiality error method that another embodiment of the application provides;
Figure 12 is the schematic diagram of point midway in a kind of position relationship data acquisition system that one embodiment of the application provides;
Figure 13 is the flow diagram of a kind of measuring for the coaxiality error method that the further embodiment of the application provides.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, the technical solution in the embodiment of the present application is carried out clear, complete Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on Embodiment in the application, those of ordinary skill in the art are obtained every other without making creative work Embodiment shall fall in the protection scope of this application.
The embodiment of the present application provides a kind of measuring for the coaxiality error method, as shown in Figure 1, real based on laser measuring equipment Existing, the laser measuring equipment includes:Control device, stepping equipment, slewing, angular coding equipment and diameter measurement are set It is standby;Wherein, the slewing is for installing shaft-like workpiece, and shaft-like workpiece is driven to be rotated in preset level face, the angle Degree encoding device is used to define relative zero of the shaft-like workpiece in rotary motion, and according to the angle of control device transmission Shaft-like workpiece described in pulse collection is in the angle-data corresponding to each rotation angle;The stepping equipment is used for according to the control The stepping pulse signal of control equipment transmission, drives measurement device of diameter to be moved along the extending direction of shaft-like workpiece, so that described straight Diameter measuring apparatus measures the first end point position and the second endpoint location at shaft-like workpiece different cross section position;The control device For sending stepping pulse signal to the stepping equipment, angle pulse signal is sent to the slewing, with described in control The movement of stepping equipment, slewing, and the angular coding equipment and the data of measurement device of diameter measurement are received, obtain axis Class workpiece interface is in different rotary angle and its position relationship data of the position relationship data acquisition system of corresponding radial direction endpoint Set;The measuring for the coaxiality error method includes:
S101:At the sectional position of the shaft-like workpiece, the section is obtained in different rotary angle and its corresponding Radial direction endpoint position relationship data acquisition system;
S102:According to the position relationship data acquisition system, fitting obtains the point midway of the position relationship data acquisition system Corresponding fitting sine curve;
S103:According to the sinusoidal crest location of the fitting and wave trough position, it is corresponding with the section to calculate acquisition Center of circle jerk value;
S104:According to the corresponding center of circle jerk value in multiple and different sectional positions of the shaft-like workpiece, the axis class is determined The coaxiality error of workpiece.
It should be noted that the laser measuring equipment mainly includes control device, stepping equipment, slewing, angle Encoding device and measurement device of diameter, with reference to figure 2, the shaft-like workpiece is mounted on slewing, by slewing band moving axis Class workpiece rotates in the plane (preset level face) perpendicular to paper, and the angular coding equipment exists for defining shaft-like workpiece Relative zero in rotary motion, and the angle pulse according to control device transmission acquires shaft-like workpiece in each rotation angle institute Corresponding test data;The stepping equipment is used to that measurement device of diameter to be driven to move along the extending direction of shaft-like workpiece, so that The measurement device of diameter can measure the first end point position and the second endpoint location at shaft-like workpiece different cross section position;Institute Control device is stated for controlling the movement of the stepping equipment, slewing, receives the angular coding equipment and diameter measurement The data of device measuring, obtain the position relationship data acquisition system in shaft-like workpiece section, and the label 10 in Fig. 2 represents that the rotation is set Standby, 20 represent the measurement device of diameter, and 30 represent the stepping equipment, and 40 represent the angular coding equipment, and 50 represent institute Control device is stated, WP represents the shaft-like workpiece.
Optionally, the stepping equipment can be made of stepper motor, air-float guide rail and grating scale, to combine diameter measurement Equipment achievees the purpose that program-controlled step-scan;The measurement device of diameter can be laser alignment measurement ruler;The slewing It can be direct current torque motor;The angular coding equipment can be extended-range encoder.
When the direct current measuring devices are laser alignment measurement ruler, the structure of the measurement device of diameter as shown in figure 3, Mainly include two measuring scales being oppositely arranged, each measuring scale includes laser-emitting face and a laser pick-off face, and laser connects Receipts face is used to receive the laser of laser-emitting face outgoing, and when having object being measured among two measuring scales, laser-emitting face goes out The laser penetrated is blocked, and laser pick-off face can obtain the endpoint location of object being measured by the part being blocked, and diameter is surveyed Amount equipment needs to carry out relative calibration process before the use, with reference to figure 4, by the use of measuring grade standard cylinder as benchmark to straight Diameter measuring apparatus is calibrated;In figs. 3 and 4, two measuring scales are respectively from laser-emitting face shoot laser, the grade that is measured mark The laser pick-off face that the laser that director circle cylinder blocks can not be tested gage is received, and the survey of diameter is realized by the part being blocked Amount.In calibration process, traverse measurement ruler first is needed to acquire measurement data to metering grade standard cylinder in the calibration mode, The diameter reference of the opposite difference value of zero of standard cylinder diameter and zero point of reference frame position can be obtained.
With reference to figure 5 when being measured using measurement device of diameter, the section circle contour of the shaft-like workpiece actually measured is compared Standard cylinder is changed.The first end point position and the second endpoint position of the section circle of tested shaft-like workpiece can be measured It puts, and can be calculated by specified calculation formula and provide measured section diameter of a circle measured value, while provide diameter two-end-point The coordinate variation of relative standard's cylinder in the Y direction, in Fig. 3-Fig. 5, label 21 represents the laser-emitting face of measuring scale, 22 represent the laser pick-off face of measuring scale, and in figures 4 and 5, -0 ,+0 represents that in calibration process standard cylinder is at two The endpoint location of measuring scale, i.e. first end point position and the second endpoint location, 0 represents that in calibration process standard cylinder is fixed Target zero-bit, L0 represent the diameter of standard cylinder, and L1 represents the diameter of tested cylinder.
In practical measurement process, data model with reference to figure 6, wherein, angle pulse is used to control the slewing Rotation, for zero pulse for recording whether shaft-like workpiece rotates a circle, obtained data are under different angle pulses, directly First end point position, the second endpoint location and the diameter length for the tested shaft-like workpiece that diameter measuring apparatus obtains, wherein, midpoint position Putting can be by being calculated.
The principle for measuring the definition of concentricity and the application concentricity is illustrated below:
With reference to figure 7, shaft-like workpiece can be considered as to be made of the cylinder of multiple and different diameters, these cylinders constitute more A step, the cylinder for forming each step have the datum axis of oneself, and the axis that the cylinder of these steps collectively forms Class workpiece tool there are one common reference axis, when in shaft-like workpiece there are during coaxiality error, the datum axis of each cylinder With the common reference axis of shaft-like workpiece and be not arranged on the same straight line, the datum axis of each cylinder and the public affairs of shaft-like workpiece The coaxiality error of the deviation, the referred to as cylinder of datum axis altogether.
It is each round with that can include in common reference axis neighborhood according to the lowest area principal in GB/T 1182-2008 The diameter of the smallest circle cylinder of cylinder extraction center line (line in the fitting circle center of circle of several section circles) is as the measured axis Measuring for the coaxiality error result.Concentricity is measured, to solve two critical issues:
A) the common reference axis of shaft-like workpiece is determined;
B) the extraction center line of each cylinder is determined.
GB/T 18780.2-2003 are provided, public when establishing common reference axis by two or more extraction center line Datum axis is the fitting axis common to these extraction center lines altogether, as shown in Figure 8.
When the datum axis of each step is established by extraction center line, datum axis is straight for the fitting of the extraction center line Line, as shown in Fig. 9 (a).Extraction center line is the track for extracting each cross section extraction profile center of revolving body, and each cross section is vertical In the axis of fitting revolving body obtained by extracting surface, as shown in Fig. 9 (b).The center of extraction profile refers to the plan of the profile Close the center of circle of circle.
In the present embodiment, we are first measured at multiple and different sectional positions of shaft-like workpiece, corresponding with sectional position Position relationship data acquisition system, then according to the position relationship data acquisition system, fitting obtains the position relationship data acquisition system The corresponding fitting sine curve of point midway, the fitting sine curve obtained herein correspond to the fitting circle at the sectional position The center of circle different rotary angle around shaft-like workpiece common reference axis movement locus, therefore, we can be according to this Sinusoidal crest location and wave trough position are fitted, calculates and obtains the center of circle corresponding with sectional position jerk value;Finally lead to The corresponding center of circle jerk value in multiple and different sectional positions of the shaft-like workpiece is crossed, determines the concentricity of the shaft-like workpiece Error.The measuring for the coaxiality error method is when measuring coaxiality error, it is only necessary to realize axis class by laser measuring equipment The measurement of the position relationship data acquisition system of workpiece different cross section, without customization amount instrument and contact formula weight instrument to shaft-like workpiece It measures, the possibility that shaft-like workpiece is scratched in measurement process is not only avoided, and measurement process is easy, so as to improve The measurement efficiency of the coaxiality error of shaft-like workpiece.
It is as shown in Figure 10, described according to the plan in one embodiment of the application on the basis of above-described embodiment Sinusoidal crest location and wave trough position are closed, the acquisition center of circle corresponding with section jerk value is calculated and includes:
S1031:Obtain the value of the sinusoidal crest location of the fitting and wave trough position;
S1032:The value of the sinusoidal crest location of the fitting and wave trough position is substituted into preset formula, is calculated Obtain the center of circle corresponding with section jerk value;
The preset formula is:T=Y1-Y2, wherein, T is center of circle jerk value, and Y1 represents to be fitted sinusoidal wave crest position The value put, Y2 represent to be fitted the value of sinusoidal wave trough position.
On the basis of above-described embodiment, in another embodiment of the application, as shown in figure 11, described in the basis Position relationship data acquisition system, fitting obtain the corresponding fitting sine curve packet of point midway of the position relationship data acquisition system It includes:
S1021:According to the first end point position of the position relationship data acquisition system of acquisition and the second endpoint location, described in calculating The point midway of position relationship data acquisition system;
S1022:According to the point midway of the position relationship data acquisition system, fitting obtains and the position relationship data set The corresponding fitting sine curve of point midway of conjunction.
It should be noted that according to the first end point position of the position relationship data acquisition system of acquisition and the second endpoint location, The signal of the point midway of the position relationship data acquisition system obtained is calculated with reference to figure 12, first end is measured at multiple rotation angles Behind point position and the second endpoint location, first end point position and the second endpoint location to every group carry out asking respectively the meter at midpoint It calculates, obtains the point midway of every group of first end point position and the second endpoint location, label DP1 and DP2 represent the respectively in Figure 12 End point and the second endpoint, MP represent to calculate the point midway obtained by first end point position and the second endpoint location.
In the point midway according to the position relationship data acquisition system, fitting obtains and the position relationship data acquisition system During the corresponding fitting sine curve of point midway, using the approximating method of least square method, due to using least square Method is fitted sinusoidal process and has been well known to those skilled in the art, and this will not be repeated here by the application.
On the basis of above-described embodiment, in another embodiment of the application, as shown in figure 13, described in the basis The corresponding center of circle jerk value in multiple and different sectional positions of shaft-like workpiece, determines that the coaxiality error of the shaft-like workpiece includes:
S1041:By the maximum value in the corresponding center of circle jerk value in multiple and different sectional positions of the shaft-like workpiece, as The coaxiality error of the shaft-like workpiece.
According to the definition of concentricity:It can include the minimum of each cylinder extraction center line in common reference axis neighborhood The diameter of cylinder as the measured axis measuring for the coaxiality error result it is found that being jumped from the corresponding center of circle in more sectional positions Coaxiality error of the maximum value as the shaft-like workpiece is chosen in momentum, closer to the true concentricity of the shaft-like workpiece Error.
In conclusion the embodiment of the present application provides a kind of measuring for the coaxiality error method, the measuring for the coaxiality error Method is obtaining the section with shaft-like workpiece in different rotary angle and its position relationship data set of corresponding radial direction endpoint It closes, according to the position relationship data acquisition system, fitting obtains the corresponding fitting of point midway of the position relationship data acquisition system Sine curve, the center of circle which corresponds to the fitting circle at the sectional position surround axis class in different rotary angle The movement locus of the common reference axis of workpiece, therefore, can according to the sinusoidal crest location of the fitting and wave trough position, Calculate the center of circle jerk value for obtaining fitting circle corresponding with the sectional position;Finally by the multiple and different of the shaft-like workpiece The corresponding center of circle jerk value in sectional position determines the coaxiality error of the shaft-like workpiece.The measuring for the coaxiality error method When measuring coaxiality error, it is only necessary to the position relationship data set of shaft-like workpiece different cross section is realized by laser measuring equipment The measurement of conjunction measures shaft-like workpiece without the amount instrument and contact formula weight instrument of customization, not only avoids and measuring The possibility of shaft-like workpiece is scratched in journey, and measurement process is easy, so as to improve the measurement of the coaxiality error of shaft-like workpiece Efficiency.
Measuring for the coaxiality error system provided by the embodiments of the present application is described below, concentricity described below is missed Difference measurements system can correspond reference with above-described measuring for the coaxiality error method.
A kind of measuring for the coaxiality error system realizes, the laser measuring equipment includes based on laser measuring equipment:Control Equipment, stepping equipment, slewing, angular coding equipment and measurement device of diameter;Wherein, the slewing is used for installation axle Class workpiece, and shaft-like workpiece is driven to be rotated in preset level face, the angular coding equipment is being revolved for defining shaft-like workpiece Relative zero during transhipment is dynamic, and the angle pulse according to control device transmission acquires the shaft-like workpiece in each rotation Angle-data corresponding to angle;The stepping equipment is used for the stepping pulse signal transmitted according to the control device, drives Measurement device of diameter is moved along the extending direction of shaft-like workpiece, so that the measurement device of diameter measures shaft-like workpiece different cross section First end point position and the second endpoint location at position;The control device is used to send step-by-step impulse to the stepping equipment Signal sends angle pulse signal to the slewing, to control the movement of the stepping equipment, slewing, and receives The data that the angular coding equipment and measurement device of diameter measure obtain shaft-like workpiece section in different rotary angle and its institute The position relationship data acquisition system of the position relationship data acquisition system of corresponding radial direction endpoint;The measuring for the coaxiality error system packet It includes:
Data acquisition module, at the sectional position of the shaft-like workpiece, obtaining and the position relationship data set It closes;
Curve fitting module, for according to the position relationship data acquisition system, fitting to obtain the position relationship data set The corresponding fitting sine curve of point midway of conjunction;
First computing module, for according to the sinusoidal crest location of the fitting and wave trough position, calculate obtain with The corresponding center of circle jerk value in the section;
Second computing module, for the corresponding center of circle jerk value in multiple and different sectional positions according to the shaft-like workpiece, Determine the coaxiality error of the shaft-like workpiece.
Optionally, first computing module includes:
Reading cell, for obtaining the value of the sinusoidal crest location of the fitting and wave trough position;
Computing unit, for the value of the sinusoidal crest location of the fitting and wave trough position to be substituted into preset formula In, it calculates and obtains the center of circle corresponding with section jerk value;
The preset formula is:T=Y1-Y2, wherein, T is center of circle jerk value, and Y1 represents to be fitted sinusoidal wave crest position The value put, Y2 represent to be fitted the value of sinusoidal wave trough position.
Optionally, the curve fitting module includes:
Mid-point computation unit, for the first end point position and the second endpoint position of the position relationship data acquisition system according to acquisition It puts, calculates point midway of the midpoint of the two as the position relationship data acquisition system;
Fitting unit, for the point midway according to the position relationship data acquisition system, fitting is obtained closes with the position It is the corresponding fitting sine curve of point midway of data acquisition system.
Optionally, second computing module is specifically used for, and multiple and different sectional positions of the shaft-like workpiece are corresponded to Center of circle jerk value in maximum value, the coaxiality error as the shaft-like workpiece.
In conclusion the embodiment of the present application provides a kind of measuring for the coaxiality error method and measuring system, wherein, it is described Measuring for the coaxiality error method is being obtained with the section of shaft-like workpiece in different rotary angle and its corresponding radial direction endpoint Position relationship data acquisition system, according to the position relationship data acquisition system, fitting obtains the midpoint of the position relationship data acquisition system The corresponding fitting sine curve in position, the fitting sine curve correspond to the center of circle of the fitting circle at the sectional position in different rotations Gyration, therefore, can be according to the sinusoidal wave crest of the fitting around the movement locus of the common reference axis of shaft-like workpiece Position and wave trough position calculate the center of circle jerk value for obtaining fitting circle corresponding with the sectional position;Finally by the axis The corresponding center of circle jerk value in multiple and different sectional positions of class workpiece determines the coaxiality error of the shaft-like workpiece.It is described same Axis degree error measurement method is when measuring coaxiality error, it is only necessary to realize shaft-like workpiece different cross section by laser measuring equipment Position relationship data acquisition system measurement, without customization amount instrument and contact formula weight instrument shaft-like workpiece is measured, no The possibility that shaft-like workpiece is scratched in measurement process is only avoided, and measurement process is easy, so as to improve shaft-like workpiece The measurement efficiency of coaxiality error.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or using the application. A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein General Principle can in other embodiments be realized in the case where not departing from spirit herein or range.Therefore, the application The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one The most wide range caused.

Claims (8)

  1. A kind of 1. measuring for the coaxiality error method, which is characterized in that realized based on laser measuring equipment, the laser measuring equipment Including:Control device, stepping equipment, slewing, angular coding equipment and measurement device of diameter;Wherein, the slewing For installing shaft-like workpiece, and shaft-like workpiece is driven to be rotated in preset level face, the angular coding equipment is used to define axis Relative zero of the class workpiece in rotary motion, and the angle pulse according to control device transmission acquires the shaft-like workpiece In the angle-data corresponding to each rotation angle;The stepping equipment is used for the step-by-step impulse transmitted according to the control device Signal drives measurement device of diameter to be moved along the extending direction of shaft-like workpiece, so that the measurement device of diameter measures axis class work First end point position and the second endpoint location at part different cross section position;The control device is used to send out to the stepping equipment Stepping pulse signal is sent, angle pulse signal is sent to the slewing, to control the stepping equipment, the fortune of slewing It is dynamic, and the angular coding equipment and the data of measurement device of diameter measurement are received, shaft-like workpiece section is obtained in different rotary The position relationship data acquisition system of angle and its corresponding radial direction endpoint;The measuring for the coaxiality error method includes:
    At the sectional position of the shaft-like workpiece, obtain with the section in different rotary angle and its corresponding longitudinal end The position relationship data acquisition system of point;
    According to the position relationship data acquisition system, fitting obtains the corresponding fitting of point midway of the position relationship data acquisition system Sine curve;
    According to the sinusoidal crest location of the fitting and wave trough position, calculate and obtain center of circle bounce corresponding with the section Amount;
    According to the corresponding center of circle jerk value in multiple and different sectional positions of the shaft-like workpiece, the coaxial of the shaft-like workpiece is determined Spend error.
  2. 2. according to the method described in claim 1, it is characterized in that, it is described according to the sinusoidal crest location of the fitting with Wave trough position calculates the acquisition center of circle corresponding with section jerk value and includes:
    Obtain the value of the sinusoidal crest location of the fitting and wave trough position;
    The value of the sinusoidal crest location of the fitting and wave trough position is substituted into preset formula, calculate obtain with it is described The corresponding center of circle jerk value in section;
    The preset formula is:T=Y1-Y2, wherein, T is center of circle jerk value, and Y1 represents to be fitted sinusoidal crest location Value, Y2 represent to be fitted the value of sinusoidal wave trough position.
  3. 3. according to the method described in claim 1, it is characterized in that, it is described according to the section in different rotary angle and its institute The position relationship data acquisition system of corresponding radial direction endpoint, the point midway that fitting obtains the position relationship data acquisition system are corresponding Fitting sine curve includes:
    According to the first end point position of the position relationship data acquisition system of acquisition and the second endpoint location, the midpoint conduct of the two is calculated The point midway of the position relationship data acquisition system;
    According to the point midway of the position relationship data acquisition system, fitting obtains and the midpoint of position relationship data acquisition system position Put corresponding fitting sine curve.
  4. 4. according to the method described in claim 1, it is characterized in that, multiple and different sections position according to the shaft-like workpiece Corresponding center of circle jerk value is put, determines that the coaxiality error of the shaft-like workpiece includes:
    By the maximum value in the corresponding center of circle jerk value in multiple and different sectional positions of the shaft-like workpiece, as the axis class work The coaxiality error of part.
  5. 5. a kind of measuring for the coaxiality error system, which is characterized in that realized based on laser measuring equipment, the laser measuring equipment Including:Control device, stepping equipment, slewing, angular coding equipment and measurement device of diameter;Wherein, the slewing For installing shaft-like workpiece, and shaft-like workpiece is driven to be rotated in preset level face, the angular coding equipment is used to define axis Relative zero of the class workpiece in rotary motion, and the angle pulse according to control device transmission acquires the shaft-like workpiece In the angle-data corresponding to each rotation angle;The stepping equipment is used for the step-by-step impulse transmitted according to the control device Signal drives measurement device of diameter to be moved along the extending direction of shaft-like workpiece, so that the measurement device of diameter measures axis class work First end point position and the second endpoint location at part different cross section position;The control device is used to send out to the stepping equipment Stepping pulse signal is sent, angle pulse signal is sent to the slewing, to control the stepping equipment, the fortune of slewing It is dynamic, and the angular coding equipment and the data of measurement device of diameter measurement are received, shaft-like workpiece section is obtained in different rotary The position relationship data acquisition system of the position relationship data acquisition system of angle and its corresponding radial direction endpoint;The coaxiality error is surveyed Amount system includes:
    Data acquisition module, at the sectional position of the shaft-like workpiece, obtaining and the position relationship data acquisition system;
    Curve fitting module, for according to the position relationship data acquisition system, fitting to obtain the position relationship data acquisition system The corresponding fitting sine curve of point midway;
    First computing module, for according to the sinusoidal crest location of the fitting and wave trough position, calculate obtain with it is described The corresponding center of circle jerk value in section;
    Second computing module for the corresponding center of circle jerk value in multiple and different sectional positions according to the shaft-like workpiece, determines The coaxiality error of the shaft-like workpiece.
  6. 6. system according to claim 5, which is characterized in that first computing module includes:
    Reading cell, for obtaining the value of the sinusoidal crest location of the fitting and wave trough position;
    Computing unit, for the value of the sinusoidal crest location of the fitting and wave trough position to be substituted into preset formula, It calculates and obtains the center of circle corresponding with section jerk value;
    The preset formula is:T=Y1-Y2, wherein, T is center of circle jerk value, and Y1 represents to be fitted sinusoidal crest location Value, Y2 represent to be fitted the value of sinusoidal wave trough position.
  7. 7. system according to claim 5, which is characterized in that the curve fitting module includes:
    Mid-point computation unit, first end point position and the second endpoint location for the position relationship data acquisition system according to acquisition, Calculate point midway of the midpoint of the two as the position relationship data acquisition system;
    Fitting unit, for the point midway according to the position relationship data acquisition system, fitting obtains and the position relationship number According to the corresponding fitting sine curve of the point midway of set.
  8. 8. system according to claim 5, which is characterized in that second computing module is specifically used for, by the axis class Maximum value in the corresponding center of circle jerk value in multiple and different sectional positions of workpiece, the concentricity as the shaft-like workpiece are missed Difference.
CN201711461191.1A 2017-12-28 2017-12-28 Coaxiality error measuring method and system Active CN108168499B (en)

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CN111412865A (en) * 2020-04-20 2020-07-14 南京航空航天大学 Non-contact type coaxiality measuring device and method

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