CN107219820A - A kind of machine tool motion compensation method based on time series analysis - Google Patents
A kind of machine tool motion compensation method based on time series analysis Download PDFInfo
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- CN107219820A CN107219820A CN201710497052.8A CN201710497052A CN107219820A CN 107219820 A CN107219820 A CN 107219820A CN 201710497052 A CN201710497052 A CN 201710497052A CN 107219820 A CN107219820 A CN 107219820A
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- temperature
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- machine tool
- lathe
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/404—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35408—Calculate new position data from actual data to compensate for contour error
Abstract
The invention discloses a kind of machine tool motion compensation method based on time series analysis, comprise the following steps：Set up temperature difference deformation model；The t after lathe brings into operation respectively1Moment and t2Moment gathers the temperature T of lathe target kinematic axis1And T2；Temperature difference T is calculated, and current shape variables L is calculated based on temperature difference deformation model, and judges current shape variables L whether in error range, and error compensation is carried out to target kinematic axis according to judged result.First according to lathe, the temperature variations of kinematic axis set up difference deformation model to the present invention after a period of time has been moved, each metal parts frictional heat influences whether the temperature of kinematic axis in lathe, then formulate that the temperature of kinematic axis changes and changed over time and model that produce deformation can easily determine the deformation quantity of target machine tool motion axle by analyzing temperature variations of the target machine tool motion axle in preset time period, so as to carry out error compensation according to above-mentioned deformation quantity, the specific aim of error compensation is improved.
Description
Technical field
The present invention relates to lathe temperature detection technical field, more particularly to a kind of machine tool motion compensation based on time series analysis
Method.
Background technology
In the machining of precision machine tool, influence of the thermal source to the machining accuracy of lathe is larger, improves the processing of workpiece
Precision must make quantitative study to the thermal deformation of workpiece and the thermal deformation of lathe, and carry out in process rational control and
Error compensation.The measurement and compensation of machine tool thermal error, are generally required on the basis of machine tool thermal error measurement, by analyzing lathe
The temperature value of diverse location temperature sensor measurement and the relation of thermal deformation of machine tool, set up numerical control machining tool heat error model, and according to
This thermal deformation to lathe is compensated.
However, the difficult point and key problem in technology that lathe temperature survey mode is this work how are selected, how simply,
Quickly and efficiently detected and adjusted come the machining accuracy to lathe by gathering the temperature of some positions of lathe, be ability
One of field technique personnel's urgent problem.
The content of the invention
The technical problem existed based on background technology, the present invention proposes a kind of machine tool motion compensation based on time series analysis
Method.
Machine tool motion compensation method proposed by the present invention based on time series analysis, comprises the following steps：
S1, set up temperature difference deformation model；
S2, the respectively t after lathe brings into operation1Moment and t2Moment gathers the temperature T of lathe target kinematic axis1And T2；Its
In, t2>t1；
S3, temperature difference T is calculated, and current shape variables L is calculated based on temperature difference deformation model, and judge current shape variables L
Whether in error range, and error compensation is carried out to target kinematic axis according to judged result, wherein, T=T2-T1。
Preferably, temperature difference deformation model is specifically included in step S1：
Preferably, specifically included in step S2：
Utilize multiple temperature collect modules t after lathe brings into operation respectively1Moment and t2Moment collection lathe target motion
The temperature T of axle1And T2, and each temperature collect module includes multiple temperature sensors；
Preferably, the temperature sensor uses infrared temperature sensor.
Preferably, step S3 is specifically included：
According to current shape variables L and default deformation quantity L0Be compared to judge that L is no and exceed error allowed band, when L≤
xL0When, judge that L is in error allowed band and need not carry out error compensation, works as L>xL0When, judge that L exceeds error allowed band
And error compensation is carried out, error compensation value is current shape variables L；
Wherein, x is preset value and x>1.
Preferably, step S3 also includes：
As T >=yTbWhen, start-up temperature abnormity early warning, and show the Current Temperatures T of lathe target kinematic axis；
Wherein, y>1.
The present invention initially sets up difference deformation model, and the difference deformation model is transported according to lathe after a period of time has been moved
The temperature variations of moving axis are formulated, because each metal parts frictional heat influences whether the temperature of kinematic axis in lathe, because
Model that is that this temperature that kinematic axis is formulated according to preset rules changes and changed over time and producing deformation can facilitate
Determine the shape of target machine tool motion axle by analyzing temperature variations of the target machine tool motion axle in preset time period
Variable, so as to carry out error compensation according to above-mentioned deformation quantity, improves the specific aim of error compensation.Specifically：The present invention exists respectively
Two time points gather two temperature of machine tool motion axle, and then check that target lathe is transported by analyzing the difference of two temperature values
Situation of change of the moving axis in preset time period, analyzes its temperature changing trend, is transported according to the scope of the temperature difference for target lathe
Moving axis selects corresponding deformation quantity, wherein deformation quantity and temperature difference proportional, is more suitable for expansion principle, improves shape
The validity and specific aim of variable distribution.Further, the present invention gathers the temperature of machine tool motion axle two time points respectively
And its temperature difference is analyzed, it is to avoid the drawbacks of temperature easy cataclysm and easily impacted and interference temperature collection result,
Targetedly the temperature changing trend of machine tool motion axle is analyzed, error benefit is improved by improving the precision of temperature analysis
The specific aim repaid, so that accurately and rapidly the machining accuracy to lathe is adjusted, it is ensured that the processing effect of lathe.
Brief description of the drawings
Fig. 1 is a kind of step schematic diagram of the machine tool motion compensation method based on time series analysis.
Embodiment
As shown in figure 1, Fig. 1 is a kind of machine tool motion compensation method based on time series analysis proposed by the present invention.
Reference picture 1, the machine tool motion compensation method proposed by the present invention based on time series analysis, comprises the following steps：
S1, set up temperature difference deformation model；
S2, the respectively t after lathe brings into operation1Moment and t2Moment gathers the temperature T of lathe target kinematic axis1And T2；Its
In, t2>t1；
In present embodiment, step S2 is specifically included：
Utilize multiple temperature collect modules t after lathe brings into operation respectively1Moment and t2Moment collection lathe target motion
The temperature T of axle1And T2, set multiple temperature collect modules can be from the temperature of diverse location and different angles to lathe target kinematic axis
Degree is acquired, and the accurate of temperature acquisition result is improved on the basis of collateral security is comprehensive to target kinematic axis temperature acquisition
Property, provide reliable reference frame for the follow-up temperature analysis to each machine tool motion axle；And each temperature collect module
Including multiple temperature sensors, multiple temperature sensors are set to be conducive to further improving each temperature collect module temperature and adopt
Collect the precision of result；Preferably, the temperature sensor uses infrared temperature sensor.
S3, temperature difference T is calculated, and current shape variables L is calculated based on temperature difference deformation model, and judge current shape variables L
Whether in error range, and error compensation is carried out to target kinematic axis according to judged result, wherein, T=T2-T1。
Step S3 is specifically included：
According to current shape variables L and default deformation quantity L0Be compared to judge that L is no and exceed error allowed band, when L≤
xL0When, show that the current deformation quantity of target machine tool motion axle is smaller, now judge L in error allowed band and without carrying out
Error compensation, works as L>xL0When, show that the current deformation quantity of target machine tool motion axle is larger, to avoid above-mentioned larger deformation quantity
Machining accuracy to lathe is impacted, and is judged L beyond error allowed band and is carried out error compensation, error compensation value is current
Deformation quantity L, makes lathe keep stable effectively machining accuracy, so as to ensure the quality and effect of product processed；
Wherein, x is preset value and x>1.
In present embodiment, temperature difference deformation model is specifically included in step S1：
When target machine tool motion axle is in t1Moment is to t2Temperature rise is smaller in this period at moment, shows target lathe
The Current Temperatures of kinematic axis are relatively low, now then distribute less deformation quantity for it；When target machine tool motion is in above-mentioned period temperature
Degree rise is more apparent, then shows that the actual temperature of the machine tool motion axle after the above-mentioned period is higher, and this high temperature is necessarily transported to lathe
The running status of moving axis is impacted, and larger deformation quantity, the convenient follow-up deformation quantity to machine tool motion axle are now distributed for it
Analyzed.Above-mentioned temperature difference deformation model is according to the actual motion state and operational factor of test of many times data result and lathe
Set, be conducive to improving the validity and specific aim of deformation quantity distribution.
In a still further embodiment, step S3 also includes：
As T >=yTbWhen, show target machine tool motion axle in t1Moment is to t2Temperature elevated-levels in this period at moment
Too high, then now the actual temperature of target machine tool motion axle is too high, to make relevant staff notice the abnormal conditions, starts
Temperature anomaly early warning, and the Current Temperatures T of lathe target kinematic axis is shown, not only contribute to enter trip temperature to relevant staff
Abnormal alarm, and facilitate above-mentioned staff to view the actual temperature of lathe target kinematic axis, make it according to actual temperature
Targetedly counte-rplan and solution are taken, so as to ensure the normal operating condition of lathe；Wherein, y>1.
Present embodiment initially sets up difference deformation model, and the difference deformation model is moving a period of time according to lathe
The temperature variations of kinematic axis are formulated afterwards, because each metal parts frictional heat influences whether the temperature of kinematic axis in lathe
Degree, thus formulate according to preset rules model that is that the temperature of kinematic axis changes and changed over time and producing deformation can be with
Easily target machine tool motion axle is determined by analyzing temperature variations of the target machine tool motion axle in preset time period
Deformation quantity so that according to above-mentioned deformation quantity carry out error compensation, improve error compensation specific aim.Specifically：This embodiment party
Formula gathers two temperature of machine tool motion axle two time points respectively, and then checks mesh by the difference for analyzing two temperature values
Situation of change of the machine tool motion axle in preset time period is marked, its temperature changing trend is analyzed, is mesh according to the scope of the temperature difference
Mark machine tool motion axle and select corresponding deformation quantity, wherein deformation quantity and temperature difference proportional, be more suitable for expansion principle,
Improve the validity and specific aim of deformation quantity distribution.Further, present embodiment is respectively in two time point collection lathes
The temperature of kinematic axis simultaneously analyzed its temperature difference, it is to avoid the easy cataclysm of temperature and easily impacted and interference temperature is gathered
As a result the drawbacks of, targetedly the temperature changing trend of machine tool motion axle is analyzed, by the precision for improving temperature analysis
To improve the specific aim of error compensation, so that accurately and rapidly the machining accuracy to lathe is adjusted, it is ensured that the processing of lathe
Effect.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (5)
1. a kind of machine tool motion compensation method based on time series analysis, it is characterised in that comprise the following steps：
S1, set up temperature difference deformation model；
S2, the respectively t after lathe brings into operation1Moment and t2Moment gathers the temperature T of lathe target kinematic axis1And T2；Wherein, t2
>t1；
S3, temperature difference T is calculated, and current shape variables L is calculated based on temperature difference deformation model, and whether judge current shape variables L
Error compensation is carried out to target kinematic axis in error range, and according to judged result, wherein, T=T2-T1。
2. the machine tool motion compensation method according to claim 1 based on time series analysis, it is characterised in that the middle temperature of step S1
Poor deformation model is specifically included：
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3. the machine tool motion compensation method according to claim 1 based on time series analysis, it is characterised in that have in step S2
Body includes：
Utilize multiple temperature collect modules t after lathe brings into operation respectively1Moment and t2Moment collection lathe target kinematic axis
Temperature T1And T2, and each temperature collect module includes multiple temperature sensors；
Preferably, the temperature sensor uses infrared temperature sensor.
4. the machine tool motion compensation method according to claim 1 based on time series analysis, it is characterised in that step S3 is specific
Including：
According to current shape variables L and default deformation quantity L0It is compared to judge that L is no beyond error allowed band, as L≤xL0When,
Judge that L is in error allowed band and need not carry out error compensation, works as L>xL0When, L is judged beyond error allowed band and is carried out
Error compensation, error compensation value is current shape variables L；
Wherein, x is preset value and x>1.
5. the machine tool motion compensation method according to claim 2 based on time series analysis, it is characterised in that step S3 is also wrapped
Include：
As T >=yTbWhen, start-up temperature abnormity early warning, and show the Current Temperatures T of lathe target kinematic axis；
Wherein, y>1.
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Cited By (1)
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| CN114328131A (en) * | 2022-03-09 | 2022-04-12 | 深圳市佳贤通信设备有限公司 | Function time consumption monitoring method based on clock period record |
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