CN108195295B - A kind of ball line slideway auxiliary raceway radius On-line Measuring Method - Google Patents
A kind of ball line slideway auxiliary raceway radius On-line Measuring Method Download PDFInfo
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- CN108195295B CN108195295B CN201810094147.XA CN201810094147A CN108195295B CN 108195295 B CN108195295 B CN 108195295B CN 201810094147 A CN201810094147 A CN 201810094147A CN 108195295 B CN108195295 B CN 108195295B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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- Length Measuring Devices By Optical Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The present invention discloses a kind of ball line slideway auxiliary raceway radius On-line Measuring Method, this method is using laser displacement sensor multiangular measurement same position at a distance from 3 points on the circular arc in groove-section, go out groove-section circular arc center location by trigonometric function relation derivation and its radius value is calculated, and the section radius of the axially distinct position of raceway is repeatedly measured, taking the average value repeatedly measured is raceway radius value.The invention realizes that, to the quick precise measurement of raceway radius, measurement accuracy is depended on used laser displacement sensor measurement accuracy, may be implemented to raceway radius measurement accuracy error using high precision laser displacement sensor less than 0.1 micron.And detected using the workbench that there is numerically-controlled machine tool itself high-precision to be driven, it measures more acurrate.
Description
Technical field
The present invention relates to linear guide fields of measurement more particularly to a kind of ball line slideway auxiliary raceway radius on-line measurements
Method.
Background technique
Currently, linear guide precision measure mostly uses greatly hand dipping or touch sensor to measure, to laboratory technician
Competency profiling height and measurement result poor accuracy.
Summary of the invention
In order to solve deficiency in the prior art, the purpose of the present invention is to provide a kind of accurate ball straight lines of measurement to lead
Rail pair raceway radius On-line Measuring Method.
To achieve the above object, the invention adopts the following technical scheme:
A kind of ball line slideway auxiliary raceway radius On-line Measuring Method, the On-line Measuring Method the following steps are included:
1) laser displacement sensor is mounted on the lathe bed of numerically-controlled machine tool by fixture, at the beginning of choosing laser displacement sensor
Beginning measurement position is point O1, wherein fixture can drive the measuring head of laser displacement sensor in the plane perpendicular to raceway axis
Around point O1Any angle rotation；
2) when the ball race grinding of linear guide, linear guide is mounted on the workbench of numerically-controlled machine tool, using at molding sand
Grinding race is taken turns, by raceway wiped clean after being ground；
3) it utilizes laser displacement sensor and cooperates the movement of numerically controlled machine, repeatedly measure and calculate raceway axis
To the section radius of different location, taking the section radius average value of the axially distinct position of raceway is raceway radius value.
The specific method is as follows for the step 3):
A) laser displacement sensor measurement point O is utilized1Three point A on to raceway circular arc sequentially1、B1、C1Distance, point
L is not denoted as it1A、l1B、l1C, wherein measurement interval angles are θ every time, i.e. O1A1With O1B1、O1B1With O1C1Angle is θ；
B) with point O1For coordinate origin, middle line O is measured1B1With coordinate system O1X coincides, the shifting of numerically controlled machine
Dynamic direction and coordinate system O1Z is parallel, establishes three-dimensional cartesian coordinate system XYZ, measurement point A1、B1、C1Coordinate be respectively (-
l1Acosθ,l1Asinθ,0)、(-l1B,0,0)、(-l1Ccosθ,-l1Csinθ,0)；
C) trigonometric function relationship is utilized, raceway circular arc A is derived by1B1C1Center of circle O '1Coordinate (x1,y1,z1), wherein
x1、y1、z1Specific exploitation it is as follows:
z1=0；
By the above-mentioned x being calculated1、y1The l that value and measurement obtain1BSubstitute into raceway radius r1Calculating formula in,Obtain the raceway radius r of the 1st measurement1；
D) drive linear guide more to carry out along each moving distance d of Z axis positive direction using numerically-controlled machine tool control workbench
Secondary measurement, laser displacement sensor measurement position remain constant, opposite raceway last time measurement point along Z-direction move away from
From d, taking n-th measurement laser displacement sensor measurement point relative position is point On, n is the integer equal to or more than 5, point OnPhase
For point O1The distance of (n-1) d is moved along Z axis, the method for repeating the 1st measurement three point of raceway circular arc obtains measurement point
An、Bn、CnCoordinate be respectively (- lnAcosθ,lnAsinθ,-(n-1)d)、(-lnB,0,-(n-1)d)、(-lnCcosθ,-lnCsin
θ,-(n-1)d)；
Also with trigonometric function relationship, it is derived by raceway circular arc AnBnCnCenter of circle O 'nCoordinate (xn,yn,zn),
Middle xn、yn、znSpecific exploitation it is as follows:
zn=-(n-1) d；
By the above-mentioned x being calculatedn、ynThe l that value and measurement obtainnBSubstitute into raceway radius rnCalculating formula in,Obtain the raceway radius r of n-th measurementn；
E) according to the above-mentioned multiple section radius r for measuring and being calculated the axially distinct position of raceway1, r2, r3..., rn,
Then using the method being averaged, then raceway radius r is obtained:
The linear guide is mounted on the workbench of numerically-controlled machine tool by magnetic absorption.
Pass through alcohol after the forming grinding wheel grinding race is complete for raceway wiped clean.
The invention adopts the above technical scheme, has the advantages that and utilizes laser displacement sensor multiangular measurement
Same position goes out the groove-section circular arc center of circle at a distance from 3 points on the circular arc in groove-section, through trigonometric function relation derivation
Simultaneously its radius value is calculated in position, and repeatedly measures the section radius of the axially distinct position of raceway, takes what is repeatedly measured to be averaged
Value is practical raceway radius value.The invention realizes that, to the quick precise measurement of raceway radius, measurement accuracy depends on used sharp
Optical displacement sensor measurement accuracy may be implemented small to raceway radius measurement accuracy error using high precision laser displacement sensor
In 0.1 micron.And detected using the workbench that there is numerically-controlled machine tool itself high-precision to be driven, it measures more acurrate.
Detailed description of the invention
The present invention is described in further details below in conjunction with the drawings and specific embodiments；
Fig. 1 is the schematic diagram of On-line Measuring Method of the present invention.
Specific embodiment
As shown in Figure 1, a kind of ball line slideway auxiliary raceway radius On-line Measuring Method of the present invention, the on-line measurement side
Method the following steps are included:
1) laser displacement sensor 4 is mounted on the lathe bed of numerically-controlled machine tool by fixture, chooses laser displacement sensor 4
Initial measurement locations are point O1, wherein fixture drives the measuring head of laser displacement sensor 4 in the plane perpendicular to raceway axis
It is interior to surround point O1Any angle rotation；
2) when the raceway 3 of linear guide 2 is ground, linear guide 2 is mounted on to the work of numerically-controlled machine tool by magnetic absorption
On platform 1, using forming grinding wheel grinding race 3, pass through alcohol after being ground for 3 wiped clean of raceway；
3) it utilizes laser displacement sensor 4 and cooperates the movement of numerically controlled machine 1, repeatedly measure and calculate raceway
The section radius of 3 axially distinct positions, taking the section radius average value of the axially distinct position of raceway 3 is 3 radius value of raceway；The step
It is rapid that the specific method is as follows:
A) 4 measurement point O of laser displacement sensor is utilized1Three point A on to 3 circular arc of raceway sequentially1、B1、C1Distance,
It is denoted as l respectively1A、l1B、l1C, wherein measurement interval angles are θ every time, i.e. O1A1With O1B1、O1B1With O1C1Angle is
θ；
B) with point O1For coordinate origin, middle line O is measured1B1With coordinate system O1X coincides, the shifting of numerically controlled machine 1
Dynamic direction and coordinate system O1Z is parallel, establishes three-dimensional cartesian coordinate system XYZ, measurement point A1、B1、C1Coordinate be respectively (-
l1Acosθ,l1Asinθ,0)、(-l1B,0,0)、(-l1Ccosθ,-l1Csinθ,0)；
C) trigonometric function relationship is utilized, 3 circular arc A of raceway is derived by1B1C1Center of circle O '1Coordinate (x1,y1,z1),
Middle x1、y1、z1Specific exploitation it is as follows:
z1=0；
By the above-mentioned x being calculated1、y1The l that value and measurement obtain1BSubstitute into 3 radius r of raceway1Calculating formula in,Obtain the 3 radius r of raceway of the 1st measurement1；
D) drive linear guide 2 along each moving distance d of Z axis positive direction to carry out using numerically-controlled machine tool control workbench 1
Repeatedly measurement, 4 measurement position of laser displacement sensor remain constant, move relative to raceway 3 last time measurement point along Z-direction
Distance d, taking n-th measurement laser displacement sensor 4 measurement point relative position is point On, n is the integer equal to or more than 5,
Point OnRelative to point O1The distance of (n-1) d is moved along Z axis, the method for repeating the 1st measurement 3 three point of circular arc of raceway obtains
Measurement point An、Bn、CnCoordinate be respectively (- lnAcosθ,lnAsinθ,-(n-1)d)、(-lnB,0,-(n-1)d)、(-lnCcosθ,-
lnCsinθ,-(n-1)d)；
Also with trigonometric function relationship, it is derived by 3 circular arc A of racewaynBnCnCenter of circle O 'nCoordinate (xn,yn,zn),
Wherein xn、yn、znSpecific exploitation it is as follows:
zn=-(n-1) d；
By the above-mentioned x being calculatedn、ynThe l that value and measurement obtainnBSubstitute into 3 radius r of racewaynCalculating formula in,Obtain the 3 radius r of raceway of n-th measurementn；
E) according to the above-mentioned multiple section radius r for measuring and being calculated the axially distinct position of raceway 31, r2, r3..., rn,
Then using the method being averaged, then 3 radius r of raceway is obtained:
Above-mentioned measurement method both can be applied to radius size in sliding block raceway and linear guide ball race grinding process
On-line measurement, also can be applied to the measurement of finished product sliding block raceway and linear guide raceway radius.
The invention realizes that, to the quick precise measurement of raceway radius, measurement accuracy depends on used laser displacement sensor
Measurement accuracy may be implemented to raceway radius measurement accuracy error using high precision laser displacement sensor less than 0.1 micron.And
And the present invention is detected using the workbench that there is numerically-controlled machine tool itself high-precision to be driven, and is measured more acurrate.
Claims (3)
1. a kind of ball line slideway auxiliary raceway radius On-line Measuring Method, it is characterised in that: the On-line Measuring Method includes
Following steps:
1) laser displacement sensor is mounted on the lathe bed of numerically-controlled machine tool by fixture, chooses laser displacement sensor and initially surveys
Amount position is point O1, wherein fixture can drive the measuring head of laser displacement sensor to surround in the plane perpendicular to raceway axis
Point O1Any angle rotation；
2) when the ball race grinding of linear guide, linear guide is mounted on the workbench of numerically-controlled machine tool, is ground using forming grinding wheel
Raceway is cut, by raceway wiped clean after being ground；
3) it utilizes laser displacement sensor and cooperates the movement of numerically controlled machine, repeatedly measure and calculate raceway and is axial not
With the section radius of position, taking the section radius average value of the axially distinct position of raceway is raceway radius value；The step 3)
The specific method is as follows:
A) laser displacement sensor measurement point O is utilized1Three point A on to raceway circular arc sequentially1、B1、C1Distance, be denoted as respectively
l1A、l1B、l1C, wherein measurement interval angles are θ every time, i.e. O1A1With O1B1、O1B1With O1C1Angle is θ；
B) with point O1For coordinate origin, middle line O is measured1B1With coordinate system O1X coincides, the moving direction of numerically controlled machine
With coordinate system O1Z is parallel, establishes three-dimensional cartesian coordinate system XYZ, measurement point A1、B1、C1Coordinate be respectively (- l1Acosθ,
l1Asinθ,0)、(-l1B,0,0)、(-l1Ccosθ,-l1Csinθ,0)；
C) trigonometric function relationship is utilized, raceway circular arc A is derived by1B1C1Center of circle O '1Coordinate (x1,y1,z1), wherein x1、
y1、z1Specific exploitation it is as follows:
z1=0；
By the above-mentioned x being calculated1、y1The l that value and measurement obtain1BSubstitute into raceway radius r1Calculating formula in,Obtain the raceway radius r of the 1st measurement1；
D) drive linear guide along each moving distance d of Z axis positive direction repeatedly to be surveyed using numerically-controlled machine tool control workbench
Amount, laser displacement sensor measurement position remain constant, and opposite raceway last time measurement point moves distance d along Z-direction,
Taking n-th measurement laser displacement sensor measurement point relative position is point On, n is the integer equal to or more than 5, point OnRelative to
Point O1The distance of (n-1) d is moved along Z axis, the method for repeating the 1st measurement three point of raceway circular arc obtains measurement point An、Bn、
CnCoordinate be respectively (- lnAcosθ,lnAsinθ,-(n-1)d)、(-lnB,0,-(n-1)d)、(-lnCcosθ,-lnCsinθ,-(n-
1)d)；
Also with trigonometric function relationship, it is derived by raceway circular arc AnBnCnCenter of circle O 'nCoordinate (xn,yn,zn), wherein xn、
yn、znSpecific exploitation it is as follows:
zn=-(n-1) d；
By the above-mentioned x being calculatedn、ynThe l that value and measurement obtainnBSubstitute into raceway radius rnCalculating formula in,Obtain the raceway radius r of n-th measurementn；
E) according to the above-mentioned multiple section radius r for measuring and being calculated the axially distinct position of raceway1, r2, r3..., rn, then adopt
With the method being averaged, then raceway radius r is obtained:
2. a kind of ball line slideway auxiliary raceway radius On-line Measuring Method according to claim 1, it is characterised in that: institute
Linear guide is stated to be mounted on the workbench of numerically-controlled machine tool by magnetic absorption.
3. a kind of ball line slideway auxiliary raceway radius On-line Measuring Method according to claim 1, it is characterised in that: institute
The complete rear alcohol that passes through of forming grinding wheel grinding race is stated by raceway wiped clean.
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| CN109990748B (en) * | 2019-04-23 | 2023-12-29 | 辽宁科技大学 | Device and method for online detection of steel coil position |
| CN114413756A (en) * | 2022-01-18 | 2022-04-29 | 四川和心亿科技有限公司 | Standard circular arc surface vertex positioning method and device |
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