CN103345199A - Numerically-controlled machine tool error compensation system and method based on human-computer interface secondary development - Google Patents
Numerically-controlled machine tool error compensation system and method based on human-computer interface secondary development Download PDFInfo
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Abstract
The invention discloses a numerically-controlled machine tool error compensation system and method based on human-computer interface secondary development. The numerically-controlled machine tool error compensation system comprises a hardware portion and a software portion integrally arranged in the hardware portion. The hardware portion comprises a Siemens 840D numerical control system PCU, a temperature sensor, a temperature data acquisition card and an error measurement instrument. The software portion comprises a temperature acquisition module, a thermal error compensation module, a space error compensation mould and a state monitoring module. According to the numerically-controlled machine tool error compensation system and method based on the human-computer interface secondary development, the error compensation function of a Siemens 840D numerical control system is effectively used for compensating space errors; the numerically-controlled machine tool error compensation system and method based on the human-computer interface secondary development is convenient and effective to implement, external expansion of compensators is not required, machine tool parameters are read based on a human-computer interface and DDE, and good on-line state monitoring can be achieved without an external upper computer.
Description
Technical field
What the present invention relates to is a kind of device and method of numerically-controlled machine processing technique field, specifically is a kind of numerically-controlled machine error compensation system based on the man-machine interface secondary development.
Background technology
Accurate and Ultraprecision Machining has become most important component and developing direction in the modern mechanical manufacturing, and becomes the gordian technique that improves international competitiveness.Numerically-controlled machine is as the important tool in the machine-building, and its precision index is the key factor that influences the workpiece machining precision.Yet, owing to numerically-controlled machine exists numerous error elements such as error that sum of errors tool wear that geometric error (by the error that lathe itself is made, the assembling defective causes), hot error (causing the error that thermal deformation causes by the lathe temperature variation), cutting force cause produces, had a strong impact on machining accuracy of NC machine tool.Studies show that: the error that the geometric error of lathe, hot error cause accounts for 70% of lathe total error, so Geometric Error for Computerized Numerical Control Milling Machine and hot compensation of error are significant to improving machine finish.
The digital control system of numerically-controlled machine mainly is Fa Nake and Siemens's two big classes in the market, and there is very big-difference in the numerically-controlled machine error compensating method of different NC system.Through existing literature data-searching is found, Study on Error Compensation to the numerically-controlled machine of Fa Nake digital control system has more achievement, as: Chinese patent " based on the numerically-controlled machine real time error compensator of lathe exterior coordinate system biasing " (application number: 200410093428.1), 200710045903.1) and Chinese patent " intelligent compensation of how much of numerically-controlled machines and hot recombination site error " (application number: 201210122422.7) Chinese patent " digital control machine tool positioning error real-time compensation device " (application number:.
Yet the compensation method that above these documents adopt all is the outside zero migration of the EMS(of Fa Nake digital control system) function, and less to the numerically-controlled machine compensation scheme research of Siemens's digital control system.The application of Siemens's digital control system on numerically-controlled machine is very extensive, and systems such as its 840D are used for the numerically-controlled machines of high-end type more, so for the error compensation project study of the numerically-controlled machine of Siemens 840D digital control system its necessity is arranged.
Summary of the invention
The present invention is directed to existing research above shortcomings, a kind of numerically-controlled machine error compensation system based on the man-machine interface secondary development is proposed, this method has Siemens 840D numerically-controlled machine is carried out high-precision error compensation function and good presence monitoring function based on the man-machine interface secondary development.
The present invention is achieved by the following technical solutions:
A kind of numerically-controlled machine error compensation system based on the man-machine interface secondary development, it comprises bucking-out system hardware components and the bucking-out system software section that is built in this bucking-out system hardware components; Described bucking-out system hardware components comprises: Siemens 840D digital control system PCU, temperature sensor, temperature data acquisition card and error measure instrument, wherein, temperature sensor is connected with the temperature data acquisition card, the temperature data acquisition cartoon is crossed Ethernet and is connected with Siemens 840D digital control system PCU, thereby the temperature value of the crucial measuring point of the lathe that the real-time Transmission temperature sensor measurement obtains, the error information of error measure instrument measuring machine bed under the crucial measuring point temperature of difference; Described bucking-out system software section adopts the VB programming mode, it comprises: temperature collect module, the heat error compensation module, space error compensating module and monitoring module, bucking-out system software is according to the temperature value of the crucial measuring point of lathe and the error information that the error measure instrument records under crucial measuring point temperature, set up error unit's prime model and the spatial error model of each kinematic axis of lathe, temperature collect module is transferred to Siemens 840D digital control system PCU by the temperature value of the crucial measuring point of some cycles circle collection lathe, PCU is according to spatial error model for Siemens 840D digital control system, with measured all error terms that obtain under the current crucial measuring point temperature all decoupling zero to X, Y, on three direction of motion of Z, determine X, Y, the total error of three kinematic axiss of Z, then calculate the fit slope value of each kinematic axis of lathe graph of errors under current crucial measuring point temperature and be saved in the byte of idle DB piece of Siemens 840D digital control system PLC, utilize the FB3 write parameters function of Siemens 840D digital control system PLC, fit slope value under the corresponding byte of this idle DB piece is write in the parameter 43910 of Siemens 840D digital control system, in parameter 32750, select the heat error compensation pattern, determine the temperature compensation value with location independent in the parameter 43900, set reference origin in the parameter 43920, the heat error compensation function implementation space error compensation of finally utilizing Siemens's 840D digital control system to carry.
Described Siemens 840D digital control system PCU refers to: the computing machine that Siemens's digital control system carries, and it has independent CPUs own, also has hard disk, floppy drive, and the control software of Siemens 840D digital control system PCU is stored in this computing machine.
Described temperature sensor refers to: platinum resistance thermometer sensor, PT100, be distributed on the key temperatures measuring point of lathe, and measurement range is 0 ℃-100 ℃, Measurement Resolution can reach ± and 0.1 ℃.
Described temperature data acquisition card refers to: grind the Adam-6015 type data collecting card that magnificent company produces, have 7 road differential type temperature acquisition passages, effective resolution can reach 16, sampling rate reached as high as for 10 sampled point/seconds, support the connected mode of PT100 two-wire system or three-wire system, support the Ethernet data host-host protocol.
Described error measure instrument refers to: to the machine tool motion axis error, as the instrument that geometric error and hot error are measured, it comprises laser interferometer and ball bar etc.
Described temperature collect module refers to: the program module that the temperature data that is distributed in the temperature sensor on the crucial measuring point of lathe is gathered.Can obtain the temperature data of the crucial measuring point of lathe by PT100 temperature sensor and Adam-6015 temperature data acquisition card, and be transferred to Siemens 840D digital control system PCU by the Ethernet form, be used for the hot error modeling of lathe.
Described heat error compensation module refers to: lathe from cold conditions to thermally equilibrated overall process, according to the temperature value of the crucial measuring point of lathe and the machine tool motion axis error that the error measure instrument measures under this temperature value, set up the module of hot error model and compensation.Studies show that: when the temperature of lathe not simultaneously, the geometric error curve shape of lathe changes and not quite and only exists slope of a curve to change.With the once linear match graph of errors is approached, can obtain the fit slope of the graph of errors of each kinematic axis under the crucial measuring point temperature of difference respectively.At first the fit slope value is saved in the byte of the idle DB piece of PLC, the fit slope value that will be arranged in the DB piece that leaves unused with the FB3 write parameters function of PLC is written to parameter 43910 then, finally realizes heat error compensation.
Described space error compensating module refers to: the module of the space error of lathe being carried out modeling and compensation; It sets up spatial error model with the homogeneous coordinate transformation method to lathe, the error information of utilizing error measuring device to measure, all error terms that will measure respectively all decoupling zero on X, Y, three direction of motion of Z, determine the total error of X, Y, three kinematic axiss of Z, determine the fit slope of each kinematic axis graph of errors, the heat error compensation function implementation space error compensation of utilizing Siemens's 840D digital control system to carry at last by the once linear match.
Described monitoring module refers to: the program module that Siemens 840D digital control system PCU monitors conditions of machine tool based on human-machine interface function, and the conditions of machine tool information of monitoring comprises organic systematic parameter, compensating coefficient, load condition and warning message; Siemens 840D digital control system for its variable-definition man-machine communication (MMC) read mode, Siemens 840D digital control system PCU is based on the bucking-out system software of VB establishment, mode by dynamic data exchange (DDE) reads the conditions of machine tool information of monitoring easily, thereby carries out condition monitoring.
Another technical scheme of the present invention is:
A kind of numerically-controlled machine error compensating method that adopts above-mentioned bucking-out system to realize, it may further comprise the steps:
The first step, set up HMI/OEM platform (man-machine interface platform) and embed the man-machine interaction software of VB establishment, specifically refer to:
1.1 open the program oembsp1.vbp that HMI programming bag carries, design the interface of oneself as required, attainable function mainly contains the visit of various variablees, as cutter partially, zero partially, the visit of various variablees among axial coordinate value etc. and the PLC, as I/O mouth, data block DB etc., generate executable file oembsp1.exe at last, and be put under the oem catalogue;
1.2 revise the RE_UK.ini in the oem catalogue, the text of configuration soft key 6 is " test " with the tag modification of No. 6 soft keys;
1.3 revise the regie.ini file in the oem catalogue, be the interface program embsp1.exe that No. 6 soft key configurations are developed;
1.4 revise " .mdi " file as required, define the inner subwindow of all programs and type thereof; Revise " .zus " file, the state of define program and action;
Second step, priority are measured and identification geometric error and the hot error of lathe with error measure instrument and temperature sensor, and set up error unit prime model according to error features and Changing Pattern, and hot error model is Δ K
X=K
0(T)+tan β (T) (P
X-P
0),
Wherein, Δ K
XBe called position associated temperature offset, K
0Be called the location independent temperature compensation value, tan β is fit slope, P
0Be the reference position, P
XBe physical location, T
0For the position correlated error equals 0 corresponding temperature, T
MaxBe the measurement temperature of maximum, TK
MaxFor at T
MaxTemperature coefficient under the situation, this temperature coefficient are illustrated in the corresponding maximum error of the every 1000mm of ball-screw under a certain temperature;
The 3rd step, according to the error of lathe unit prime model, with the homogeneous coordinate transformation method lathe is set up spatial error model, the error information of utilizing the error measure instrument to measure, respectively each is organized all error terms of measuring under the crucial measuring point temperature all decoupling zero on X, Y, three direction of motion of Z, determine the total error of X, Y, three kinematic axiss of Z, determine the fit slope value of each kinematic axis total error curve by the once linear match;
The 4th step, temperature collect module are by the temperature value of the crucial measuring point of each lathe of some cycles circle collection and be transferred to Siemens 840D digital control system PCU, and this Siemens 840D digital control system PCU calculates the fit slope value of each kinematic axis of lathe graph of errors under the crucial measuring point temperature of difference according to spatial error model and is saved in the byte of idle DB piece of PLC;
The 5th step, enforcement compensation specifically refer to:
5.1 write the PLC program, utilize the FB3 write parameters function of PLC, the fit slope value under the corresponding byte of this idle DB piece is write in the parameter 43910 of Siemens 840D digital control system;
5.2 in parameter 32750, select the heat error compensation pattern;
5.3 the irrelevant temperature compensation value of desired location is set reference origin in parameter 43920 in parameter 43900, the final heat error compensation function of utilizing Siemens's 840D digital control system to carry that realizes compensates space error.
Compare with the existing error compensation technique, the present invention takes full advantage of the heat error compensation function that Siemens's 840D digital control system carries space error is compensated, and implements easily and effectively, does not need to extend out compensator; DDE is based on the message-passing machine of Windows and manages and the technology of foundation, data rate is fast, stability is high, and Siemens's 840D digital control system carries PCU, has simplified peripherals so carry out the system variable read-write with DDE, does not need host computer can realize good presence monitoring.
Description of drawings
Fig. 1 is system architecture synoptic diagram of the present invention.
Fig. 2 is the heat error compensation workflow.
Fig. 3 is space error compensation work flow process.
Fig. 4 is body diagonal measuring principle figure.
Fig. 5 measures comparison diagram for space error body diagonal before and after the compensation of 840D vertical machining centre.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
The described numerically-controlled machine error compensation system based on the man-machine interface secondary development of present embodiment comprises: bucking-out system hardware components and bucking-out system software section, this bucking-out system software section is built in this bucking-out system hardware components.
See also Fig. 1, described bucking-out system hardware components mainly comprises: Siemens 840D digital control system PCU, temperature sensor, temperature data acquisition card and error measure instrument.Wherein: temperature sensor is connected with the temperature data acquisition card, and the temperature data acquisition cartoon is crossed Ethernet and is connected with Siemens 840D digital control system PCU, thus the temperature value of the crucial measuring point of the lathe that real-time Transmission measures; The error information of error measure instrument measuring machine bed under the crucial measuring point temperature of difference.
Described Siemens 840D digital control system PCU refers to: the computing machine that Siemens's digital control system carries, and it has own independent CPUs, can also be with hard disk, the band floppy drive, the control software of Siemens 840D digital control system PCU is also in this computing machine.
Described temperature sensor refers to: platinum resistance thermometer sensor, PT100, be distributed on the key temperatures measuring point of lathe, and measurement range is 0 ℃-100 ℃, Measurement Resolution can reach ± and 0.1 ℃.
Described temperature data acquisition card refers to: grind the Adam-6015 type data collecting card that magnificent company produces, have 7 road differential type temperature acquisition passages, effective resolution can reach 16, sampling rate reached as high as for 10 sampled point/seconds, support the connected mode of PT100 two-wire system or three-wire system, support the Ethernet data host-host protocol.
Described error measure instrument refers to: to the machine tool motion axis error, as the instrument that geometric error and hot error are measured, it comprises laser interferometer and ball bar etc.
Described bucking-out system software section has adopted VB(visual basic) programming mode, mainly comprise: temperature collect module, heat error compensation module, space error compensating module and monitoring module.Bucking-out system software is set up error unit's prime model and the spatial error model of each kinematic axis of lathe according to the error information that the temperature value of the crucial measuring point of lathe and laser interferometer and ball bar equal error surveying instrument record under crucial measuring point temperature.Temperature collect module is by the temperature value of the crucial measuring point of some cycles circle collection lathe and be transferred to Siemens 840D digital control system PCU, PCU is according to spatial error model for this Siemens 840D digital control system, with measured all error terms that obtain under the current crucial measuring point temperature all decoupling zero on X, Y, three direction of motion of Z, determine the total error of X, Y, three kinematic axiss of Z.Then calculate the fit slope value of each kinematic axis of lathe graph of errors under current crucial measuring point temperature and be saved in the byte of idle DB piece of PLC.Utilize the FB3 write parameters function of Siemens 840D digital control system PLC, fit slope value under the corresponding byte of this idle DB piece is write in the parameter 43910 of Siemens 840D system, in parameter 32750, select the heat error compensation pattern, determine the temperature compensation value with location independent in the parameter 43900, set reference origin in the parameter 43920, the heat error compensation function implementation space error compensation of finally utilizing Siemens's 840D digital control system to carry.
Described temperature collect module refers to: the program module that the temperature data of the temperature sensor that distributes on the crucial measuring point of lathe to be compensated is gathered.Can obtain the temperature data of the crucial measuring point of lathe by PT100 temperature sensor and Adam-6015 temperature data acquisition card, and be transferred to Siemens 840D digital control system PCU by the Ethernet form, be used for the hot error modeling of lathe.
Described heat error compensation module refers to: lathe from cold conditions to thermally equilibrated overall process, according to the temperature value of the crucial measuring point of lathe and the kinematic axis error that the error measure instrument measures under this temperature value, set up the module of hot error model and compensation.Studies show that: when the temperature of lathe not simultaneously, the geometric error curve shape of lathe changes and not quite and only exists slope of a curve to change, as shown in Figure 2.With the once linear match graph of errors is approached, can obtain the fit slope of the graph of errors of each kinematic axis under the crucial measuring point temperature of difference respectively.At first the fit slope value is saved in the byte of the idle DB piece of Siemens 840D digital control system PLC, then the fit slope value that will be arranged in this idle DB piece with the FB3 write parameters function of Siemens 840D digital control system PLC is written to parameter 43910, finally realizes heat error compensation.
Described space error compensating module refers to: the module of the space error of lathe being carried out modeling and compensation.As shown in Figure 3, with the homogeneous coordinate transformation method lathe is set up spatial error model, the error information of utilizing laser interferometer and ball bar equal error surveying instrument to measure, all error terms that will measure respectively all decoupling zero are determined the total error of X, Y, three kinematic axiss of Z on X, Y, three direction of motion of Z.Determine the fit slope of each kinematic axis graph of errors and be saved in the byte of idle DB piece by the once linear match, then the fit slope value that will be arranged in this idle DB piece with the FB3 write parameters function of Siemens 840D digital control system PLC is written to parameter 43910, the heat error compensation function implementation space error compensation of finally utilizing the 840D lathe to carry.
Described monitoring module refers to: the program module that Siemens 840D digital control system PCU monitors conditions of machine tool based on human-machine interface function.The conditions of machine tool information spinner of monitoring will comprise systematic parameter, compensating coefficient, load condition and the warning message etc. of lathe.Siemens 840D digital control system for its variable-definition the MMC(man-machine communication) read mode, so Siemens 840D digital control system PCU is based on the bucking-out system software of VB establishment, can be easily by the exchange of DDE(dynamic data) mode read the conditions of machine tool information of monitoring, thereby carry out condition monitoring.
Present embodiment is research experiment on a Siemens 840D three shaft vertical machining centers.
Be the concrete implementation step that present embodiment carries out numerically-controlled machine error compensation below:
The first step, set up HMI/OEM platform (man-machine interactive platform) and embed the man-machine interaction software of VB establishment.Specifically refer to:
1.1 open the program oembsp1.vbp that HMI programming bag carries, design the interface of oneself as required, attainable function mainly contains the visit of various variablees, as cutter partially, zero partially, the visit of various variablees among axial coordinate value etc. and the PLC, as I/O mouth, data block DB etc., generate executable file oembsp1.exe at last;
1.2 revise the RE_UK.ini file in the oem catalogue, the text of configuration soft key 6 is " test " with the tag modification of No. 6 soft keys;
1.3 revise the regie.ini file in the oem catalogue, be the interface program embsp1.exe that No. 6 soft key configurations are developed;
1.4 revise " .mdi " file as required, thereby define the inner subwindow of all programs and type thereof; Revise " .zus " thus state and the action of file definition oem program.
Second step, successively with laser interferometer and ball bar equal error surveying instrument and temperature sensor geometric error and the hot error of lathe are measured and identification, and set up the first prime model of error according to error features and Changing Pattern.See also Fig. 2, hot error model is Δ K
X=K
0(T)+tan β (T) (P
X-P
0),
Wherein, Δ K
XBe called position associated temperature offset, K
0Be called the location independent temperature compensation value, tan β is fit slope, P
0Be the reference position, P
XBe physical location, T
0For the position correlated error equals 0 corresponding temperature, T
MaxBe the measurement temperature of maximum, TK
MaxFor at T
MaxTemperature coefficient under the situation, this temperature coefficient are illustrated under a certain temperature, the corresponding maximum error of the every 1000mm of ball-screw.
The 3rd step, according to the error of lathe unit prime model, with the homogeneous coordinate transformation method lathe is set up spatial error model, see also Fig. 3, the error information of utilizing measuring equipments such as laser interferometer and ball bar to measure, respectively with the positioning error, angular error, straightness error and the error of perpendicularity that measure under the current crucial measuring point temperature all decoupling zero on X, Y, three direction of motion of Z, determine the total error of X, Y, three kinematic axiss of Z.Δ x=-δ
x(x)-δ
x(y)+δ
x(z)-y ε
z(x)-z ε
y(x)-z ε
Xz, Δ y=-δ
y(x)-δ
y(y)+δ
y(z)+z ε
x(x)+z ε
x(y)+x ε
Xy-z
Yz, Δ z=-δ
z(x)-δ
z(y)+δ
z(z)+y ε
x(x), δ wherein
x(x), δ
y(y) and δ
z(z) be positioning error, δ
x(y), δ
x(z), δ
y(x), δ
y(z), δ
z(x) and δ
z(y) be straightness error, ε
z(x), ε
y(x), ε
y(y), ε
x(x) and ε
x(y) be angular error, ε
Xz, ε
XyAnd ε
YzIt is the error of perpendicularity.Determine the fit slope value of each kinematic axis total error curve by the once linear match.
The 4th step, temperature collect module are by the temperature value of the crucial measuring point of each lathe of some cycles circle collection and be transferred to Siemens 840D digital control system PCU, and this Siemens 840D digital control system PCU calculates the fit slope value of each kinematic axis of lathe graph of errors under the crucial measuring point temperature of difference according to spatial error model and is saved in the byte of idle DB piece of Siemens 840D digital control system PLC.
The 5th step, enforcement compensation.Specifically refer to:
5.1 write the PLC program, utilize the FB3 write parameters function of Siemens 840D digital control system PLC, the fit slope value under the corresponding byte of this idle DB piece is write in the parameter 43910 of Siemens 840D digital control system;
5.2 in parameter 32750, select the heat error compensation pattern;
5.3 the irrelevant temperature compensation value of desired location is set reference origin in the parameter 43920 in the parameter 43900, the final heat error compensation function of utilizing Siemens's 840D digital control system to carry that realizes compensates space error.
Use the body diagonal measuring method of laser interferometer that this lathe is carried out the space error measurement.Fig. 4 is body diagonal measuring principle figure, and Fig. 5 is the error effect contrast figure of the compensation front and back of lathe, and the result shows that compensation rear space error reduces significantly.
Claims (8)
1. the numerically-controlled machine error compensation system based on the man-machine interface secondary development is characterized in that, described bucking-out system comprises bucking-out system hardware components and the bucking-out system software section that is built in this bucking-out system hardware components; Described bucking-out system hardware components comprises: Siemens 840D digital control system PCU, temperature sensor, temperature data acquisition card and error measure instrument, wherein, temperature sensor is connected with the temperature data acquisition card, the temperature data acquisition cartoon is crossed Ethernet and is connected with Siemens 840D digital control system PCU, thereby the temperature value of the crucial measuring point of the lathe that the real-time Transmission temperature sensor measurement obtains, the error information of error measure instrument measuring machine bed under the crucial measuring point temperature of difference; Described bucking-out system software section adopts the VB programming mode, it comprises: temperature collect module, the heat error compensation module, space error compensating module and monitoring module, bucking-out system software is according to the temperature value of the crucial measuring point of lathe and the error information that the error measure instrument records under crucial measuring point temperature, set up error unit's prime model and the spatial error model of each kinematic axis of lathe, temperature collect module is transferred to Siemens 840D digital control system PCU by the temperature value of the crucial measuring point of some cycles circle collection lathe, PCU is according to spatial error model for Siemens 840D digital control system, with measured all error terms that obtain under the current crucial measuring point temperature all decoupling zero to X, Y, on three direction of motion of Z, determine X, Y, the total error of three kinematic axiss of Z, then calculate the fit slope value of each kinematic axis of lathe graph of errors under current crucial measuring point temperature and be saved in the byte of idle DB piece of Siemens 840D digital control system PLC, utilize the FB3 write parameters function of Siemens 840D digital control system PLC, fit slope value under the corresponding byte of this idle DB piece is write in the parameter 43910 of Siemens 840D digital control system, in parameter 32750, select the heat error compensation pattern, determine the temperature compensation value with location independent in the parameter 43900, set reference origin in the parameter 43920, the heat error compensation function implementation space error compensation of finally utilizing Siemens's 840D digital control system to carry.
2. the numerically-controlled machine error compensation system based on the man-machine interface secondary development according to claim 1, it is characterized in that described temperature collect module refers to: the program module that the temperature data that is distributed in the temperature sensor on the crucial measuring point of lathe is gathered.
3. the numerically-controlled machine error compensation system based on the man-machine interface secondary development according to claim 1, it is characterized in that, described heat error compensation module refers to: lathe from cold conditions to thermally equilibrated overall process, according to the temperature value of the crucial measuring point of lathe and the machine tool motion axis error that the error measure instrument measures under this temperature value, set up the module of hot error model and compensation.
4. the numerically-controlled machine error compensation system based on the man-machine interface secondary development according to claim 1 is characterized in that, described space error compensating module refers to: the module of the space error of lathe being carried out modeling and compensation; It sets up spatial error model with the homogeneous coordinate transformation method to lathe, the error information of utilizing error measuring device to measure, all error terms that will measure respectively all decoupling zero on X, Y, three direction of motion of Z, determine the total error of X, Y, three kinematic axiss of Z, determine the fit slope of each kinematic axis graph of errors, the heat error compensation function implementation space error compensation of utilizing Siemens's 840D digital control system to carry at last by the once linear match.
5. the numerically-controlled machine error compensation system based on the man-machine interface secondary development according to claim 1, it is characterized in that, described monitoring module refers to: the program module that Siemens 840D digital control system PCU monitors conditions of machine tool based on human-machine interface function, and the conditions of machine tool information of monitoring comprises organic systematic parameter, compensating coefficient, load condition and warning message; Siemens 840D digital control system for its variable-definition the man-machine communication read mode, Siemens 840D digital control system PCU is based on the bucking-out system software of VB establishment, mode by the dynamic data exchange reads the conditions of machine tool information of monitoring easily, thereby carries out condition monitoring.
6. the numerically-controlled machine error compensation system based on the man-machine interface secondary development according to claim 1 is characterized in that, described error measure instrument refers to: to the instrument that the machine tool motion axis error is measured, it comprises laser interferometer and ball bar.
7. the numerically-controlled machine error compensation system based on the man-machine interface secondary development according to claim 1, it is characterized in that, described Siemens 840D digital control system PCU refers to: the computing machine that Siemens's digital control system carries, and the control software of Siemens 840D digital control system PCU is stored in this computing machine; Described temperature sensor refers to: platinum resistance thermometer sensor, PT100 is distributed on the key temperatures measuring point of lathe; Described temperature data acquisition card refers to: grind the Adam-6015 type data collecting card that magnificent company produces.
8. a numerically-controlled machine error compensating method that adopts the described bucking-out system of claim 1 to realize is characterized in that, may further comprise the steps:
The first step, set up the HMI/OEM platform and embed the man-machine interaction software of VB establishment, specifically refer to:
1.1 open the program oembsp1.vbp that HMI programming bag carries, design the interface of oneself as required, attainable function mainly contains the visit of various variablees, as cutter partially, zero partially, the visit of various variablees among axial coordinate value etc. and the PLC, as I/O mouth, data block DB etc., generate executable file oembsp1.exe at last, and be put under the oem catalogue;
1.2 revise the RE_UK.ini in the oem catalogue, the text of configuration soft key 6 is " test " with the tag modification of No. 6 soft keys;
1.3 revise the regie.ini file in the oem catalogue, be the interface program embsp1.exe that No. 6 soft key configurations are developed;
1.4 revise " .mdi " file as required, define the inner subwindow of all programs and type thereof; Revise " .zus " file, the state of define program and action;
Second step, priority are measured and identification geometric error and the hot error of lathe with error measure instrument and temperature sensor, and set up error unit prime model according to error features and Changing Pattern, and hot error model is Δ K
X=K
0(T)+tan β (T) (P
X-P
0),
Wherein, Δ K
XBe called position associated temperature offset, K
0Be called the location independent temperature compensation value, tan β is fit slope, P
0Be the reference position, P
XBe physical location, T
0For the position correlated error equals 0 corresponding temperature, T
MaxBe the measurement temperature of maximum, TK
MaxFor at T
MaxTemperature coefficient under the situation, this temperature coefficient are illustrated in the corresponding maximum error of the every 1000mm of ball-screw under a certain temperature;
The 3rd step, according to the error of lathe unit prime model, with the homogeneous coordinate transformation method lathe is set up spatial error model, the error information of utilizing the error measure instrument to measure, respectively each is organized all error terms of measuring under the crucial measuring point temperature all decoupling zero on X, Y, three direction of motion of Z, determine the total error of X, Y, three kinematic axiss of Z, determine the fit slope value of each kinematic axis total error curve by the once linear match;
The 4th step, temperature collect module are by the temperature value of the crucial measuring point of each lathe of some cycles circle collection and be transferred to Siemens 840D digital control system PCU, and this Siemens 840D digital control system PCU calculates the fit slope value of each kinematic axis of lathe graph of errors under the crucial measuring point temperature of difference according to spatial error model and is saved in the byte of idle DB piece of PLC;
The 5th step, enforcement compensation specifically refer to:
5.1 write the PLC program, utilize the FB3 write parameters function of PLC, the fit slope value under the corresponding byte of this idle DB piece is write in the parameter 43910 of Siemens 840D digital control system;
5.2 in parameter 32750, select the heat error compensation pattern;
5.3 the irrelevant temperature compensation value of desired location is set reference origin in parameter 43920 in parameter 43900, the final heat error compensation function of utilizing Siemens's 840D digital control system to carry that realizes compensates space error.
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