CN109520455A - Rotary table geometric accuracy error measuring equipment and method for measurement - Google Patents
Rotary table geometric accuracy error measuring equipment and method for measurement Download PDFInfo
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- CN109520455A CN109520455A CN201710853481.4A CN201710853481A CN109520455A CN 109520455 A CN109520455 A CN 109520455A CN 201710853481 A CN201710853481 A CN 201710853481A CN 109520455 A CN109520455 A CN 109520455A
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- axis
- standard ball
- workbench
- feeding platform
- measurement
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
A kind of rotary table geometric accuracy error measuring equipment and method for measurement, the device is set with First Five-Year Plan axis processing machine group, this five-axis robot machine has oscillating table, the feeding platform that can be moved along X-axis, Y-axis, Z axis along the workbench of C axis rotation and one that can be put along A axis pivot；Workbench is equipped with a standard ball being located on A axis, and feeding platform is equipped with three direction displacement sensors of a connection standard ball；One computing unit calculates the theory locus of standard ball according to the relative distance of standard ball and C axis, and calculates the motion track of feeding platform accordingly, and three direction displacement sensors is made to maintain the relative position of itself and standard ball.By above-mentioned apparatus, standard ball is set to a plurality of positions to be measured on workbench, measures a plurality of measurement information, carries out and total calculation is it can be learnt that geometric accuracy error.
Description
Technical field
The present invention is related with machine for automatic working, refers in particular to a kind of device of workbench geometric accuracy error for measuring processing machine
And method.
Background technique
In general, five-axis robot machine has co-existed in 43 geometric errors, and rotary table shares 6 during the motion
A freedom degree error, it is necessary to which throughput, which measures, knows error amount, and corrects or provide compensating value whereby to promote machining accuracy.
Known technology is to carry out error measurement with rotating accuracy tester, and a standard ball is set on axis of rotation
The continuous rotation of revolving speed is fixed, and obtains error amount using mathematical method.However the rotary table of tilting is because of mechanism
Standard round ball-collecting rack can not be set on axle center, and not have the mechanism of endless-rotating by design relation, thus not be available this survey
Examination instrument is measured.
Summary of the invention
The object of the present invention is to provide a kind of rotary table geometric accuracy error measuring equipment and method for measurement, can drop
Influence caused by low linear axis geometric error, and obtain several measurement information in different location, by and total calculate to obtain
More accurately geometric accuracy error amount.
To achieve the above object, the present invention takes following technical scheme:
The present invention provides a kind of rotary table geometric accuracy error measuring equipment, sets with First Five-Year Plan axis processing machine group,
In the five-axis robot machine have one using a virtual A axis be the oscillating table of pivot center of oscillation, one be set to the oscillating table and with one it is empty
Quasi- C axis be rotation center workbench and one can along one include X-axis, Y-axis, the three-dimensional axial system of Z axis move into
To platform；The measuring equipment includes:
One standard ball is set on the workbench and can be driven by the rotation of the workbench, the centre of sphere of the standard ball
On the A axis；
One or three direction displacement sensors are set on the feeding platform and can be driven by the feeding platform and move, the tripartite
It is connect to displacement sensor with the standard ball；
One computing unit, one that the standard ball can be calculated according to the relative distance of the standard ball and the C axis are theoretical
Track, and a motion track of the feeding platform is calculated according to the theory locus, so that the three directions displacement sensor is maintained itself and this
The relative position of standard ball.
The present invention more provides a kind of method for measurement using aforementioned measuring equipment comprising has:
A. a plurality of positions to be measured are defined along the direction of the X-axis on the workbench；
B. the standard ball is disposed therein on a position to be measured, and the centre of sphere of the standard ball is located at the A axis
On；
C. the theory locus of the standard ball is calculated with the computing unit, and calculates the feeding platform according to the theory locus
Motion track；
D. with three direction, displacement sensor measures the movement of the standard ball, obtains one and measures information；
E. step B to D is repeated, measures the standard ball in the measurement information of all positions to be measured；
F. by all measurement information and total calculation.
The beneficial effects of the present invention are: rotary table geometric accuracy error measuring equipment of the present invention and method for measurement,
Can reduce influence caused by linear axis geometric error, and obtain several measurement information in different location, by and it is total calculate with
Obtain more accurately geometric accuracy error amount.
Detailed description of the invention
Fig. 1 is the stereoscopic schematic diagram of measuring equipment of the present invention.
Fig. 2 and Fig. 3 is the floor map of measuring equipment of the present invention.
Fig. 4 is the flow chart of method for measurement of the present invention.
Fig. 5 is the use state diagram that the present invention measures C axis geometric accuracy error.
Fig. 6 is the use state diagram that the present invention measures A axis geometric accuracy error.
Specific embodiment
Fig. 1-Fig. 3 is please referred to, those shown is rotary table geometric accuracy error measuring equipment provided by the invention, with
1 group of First Five-Year Plan axis processing machine sets, this five-axis robot machine 1 has an oscillating table 11, a workbench 12 and a feeding platform 13, wherein should
Oscillating table 11 is hubbed on a fixed frame 14, and can carry out pivot pendulum by pivot center of oscillation of a virtual A axis；The workbench 12 is set
In on the oscillating table 11, and can be rotated by rotation center of a virtual C axis；And the feeding platform 13 can along one include X-axis,
Y-axis, the three-dimensional axial system of Z axis are mobile.
Above-mentioned processing machine may cause error due to parts size precision or assembly precision, include component error and
Location error.Component error refers to that this error amount can be as position be different and generates variation, such as while moving along X-axis will lead to
Displacement error in Y-direction or Z-direction；Location error refer to rotary shaft not its should position on, error amount will not be with
Position it is different and generate variation, such as should be not perpendicular in orthogonal two axis and form error, using a wherein axis as axis
When the heart rotates, which will not change with rotation.
Measuring equipment 2 of the invention includes a standard ball 21, one or three direction displacement sensors 22 and a computing unit
(not shown).The standard ball 21 is set on the workbench 12, and can be driven by the rotation of the workbench 12, wherein the standard
Ball 21 supports height with a support base 211, and is located at the centre of sphere of the standard ball 21 on the A axis.The three directions displacement sensing
Device 22 is set on the feeding platform 13, can be driven and be moved by the feeding platform 13, and the three directions displacement sensor 22 and the mark
Director circle ball 21 connects.The computing unit is to calculate the standard ball according to the relative distance of the standard ball 21 and the C axis again
21 theory locus, and a motion track of the feeding platform 13 is calculated according to the theory locus, the feeding platform 13 is enabled whereby
When moving along the motion track, which is maintained the relative position of itself and the standard ball 21.
By above-mentioned apparatus, the present invention is more proposed just like method for measurement shown in Fig. 4 comprising is had:
A. a plurality of positions to be measured are defined along the direction of the X-axis on the workbench；
B. the standard ball is disposed therein on a position to be measured, and the centre of sphere of the standard ball is located at the A axis
On；
C. the theory locus of the standard ball is calculated with the computing unit, and calculates the feeding platform according to the theory locus
Motion track；
D. with three direction, displacement sensor measures the movement of the standard ball, obtains one and measures information；
E. step B to D is repeated, measures the standard ball in the measurement information of all positions to be measured；
F. by all measurement information and total calculation.
In the above-mentioned methods, which is set to makes its centre of sphere be located at the position on A axis, can be removed above-mentioned
Location error, and more accurate measurement is obtained in subsequent D step, i.e., only obtain component error.For example, in the work
In the measurement for making platform 12 (C axis) geometric accuracy error, as shown in figure 5, leading to after the standard ball 21 is rotated with the workbench 12
It crosses the three directions displacement sensor 22 and measures the physical location of the standard ball 21 and the difference of theoretical position, error can be obtained
Measurement information, and after obtaining all measurement information on all positions to be measured, the workbench is can be obtained into itself and total calculate
The geometric accuracy error of 12 (C axis).
On the other hand, in the measurement of oscillating table 11 (A axis) the geometric accuracy error, as shown in fig. 6, the standard ball
After 21 with 11 pivot of oscillating table pendulum, the physical location and theory of the standard ball 21 are measured by the three directions displacement sensor 22
The difference of position can obtain the measurement information of error, and after obtaining all measurement information on all positions to be measured, simultaneously by it
It is total to calculate the geometric accuracy error that the oscillating table 11 (A axis) can be obtained.
Claims (2)
1. a kind of rotary table geometric accuracy error measuring equipment, sets, wherein the five-axis robot with First Five-Year Plan axis processing machine group
Machine has one to be set to the oscillating table and using a virtual C axis as rotation by the oscillating table of pivot center of oscillation, one of a virtual A axis
The workbench and one for turning center can include feeding platform that X-axis, Y-axis, the three-dimensional axial system of Z axis move along one；Its feature
It is, which includes:
One standard ball is set on the workbench and can be driven by the rotation of the workbench, and the centre of sphere of the standard ball is located at
On the A axis；
One or three direction displacement sensors are set on the feeding platform and can be driven by the feeding platform and move, three direction position
Sensor is moved to connect with the standard ball；
One computing unit can calculate a theory locus of the standard ball according to the relative distance of the standard ball and the C axis,
And a motion track of the feeding platform is calculated according to the theory locus, so that the three directions displacement sensor is maintained itself and the standard round
The relative position of ball.
2. a kind of method for measurement of rotary table geometric accuracy error measuring equipment as described in claim 1, feature exist
In it includes:
A. a plurality of positions to be measured are defined along the direction of the X-axis on the workbench；
B. the standard ball is disposed therein on a position to be measured, and the centre of sphere of the standard ball is located on the A axis；
C. the theory locus of the standard ball is calculated with the computing unit, and the movement of the feeding platform is calculated according to the theory locus
Track；
D. with three direction, displacement sensor measures the movement of the standard ball, obtains one and measures information；
E. step B to D is repeated, measures the standard ball in the measurement information of all positions to be measured；
F. by all measurement information and total calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853481.4A CN109520455A (en) | 2017-09-20 | 2017-09-20 | Rotary table geometric accuracy error measuring equipment and method for measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853481.4A CN109520455A (en) | 2017-09-20 | 2017-09-20 | Rotary table geometric accuracy error measuring equipment and method for measurement |
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| CN109520455A true CN109520455A (en) | 2019-03-26 |
Family
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| CN201710853481.4A Pending CN109520455A (en) | 2017-09-20 | 2017-09-20 | Rotary table geometric accuracy error measuring equipment and method for measurement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108738A (en) * | 2021-03-25 | 2021-07-13 | 中国航发南方工业有限公司 | Rotary table of turbine disc mortise three-coordinate measuring machine and fifth axis calibration method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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