CN102478823A - Novel system and method for compensating temperature of numerical control machine tool - Google Patents
Novel system and method for compensating temperature of numerical control machine tool Download PDFInfo
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- CN102478823A CN102478823A CN2010105533485A CN201010553348A CN102478823A CN 102478823 A CN102478823 A CN 102478823A CN 2010105533485 A CN2010105533485 A CN 2010105533485A CN 201010553348 A CN201010553348 A CN 201010553348A CN 102478823 A CN102478823 A CN 102478823A
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Abstract
The invention discloses a novel system and method for compensating the temperature of a numerical control machine tool. The novel system comprises a plurality of temperature sensors arranged on the machine tool, and a transducer, a programmable logic control (PLC) module and an axis module which are connected with the temperature sensors sequentially, wherein one end of the axis module is connected with a numerical control unit for temperature compensation, and the other end of the axis module is connected with a driver. The novel method comprises the following steps of: acquiring, calculating a temperature compensation value, correcting and outputting. Actual temperature curves of different positions of the machine tool are acquired by the temperature sensors; a compensation amount is output to the driver through temperature compensation to drive a servo motor to perform position compensation; and therefore, the shortcoming that the numerical control machine tool can generate errors easily under the condition of a general workshop environment is overcome, and the machining precision and the positioning precision are improved.
Description
Technical field
The present invention relates to a kind of temperature-compensated system and compensation method, relate in particular to a kind of new-type numerically-controlled machine temperature-compensated system and compensation method thereof.
Background technology
Metal material has the character of " expanding with heat and contract with cold ", and this characteristic is described with thermal expansivity on physics usually.At present; Drive disk assemblies such as guide rail basic parts such as the lathe bed of numerically-controlled machine, column, planker and ball-screw all are to be processed by metal material; Because the variation of heating, moving component frictional heating and the environment temperature etc. of drive motor; All can produce additive error to the machine tool motion shaft position, this will directly influence the bearing accuracy of lathe, thereby influence the machining precision of workpiece.
For the numerically-controlled machine that under common workshop condition condition, uses the especially long heavy duty machine tools of stroke, the influence of thermal expansivity more can not be ignored.Such as concerning the feed shaft of 5 meters of strokes, the thermal expansivity of metal material is 10ppm (the every l degree of the every lm of 10 μ m/), and the every rising l of temperature degree in theory, the x axle of the stroke of 5m be " it is long to expand " 50 μ m just.The influence of the temperature difference per day and the winter and summer temperature difference is just well imagined.Therefore high precision machine tool requires under the constant temperature of regulation, to make or use, and the numerically-controlled machine that usual terms uses down is for guaranteeing higher positioning accuracy and machining precision, and something must be done to eliminates its error.
Summary of the invention
The invention reside in the defective that overcomes prior art, and a kind of new-type numerically-controlled machine temperature-compensated system and compensation method thereof are provided, it can carry out the efficient temperature compensation, improves the bearing accuracy and the machining precision of numerically-controlled machine.
The technical scheme that realizes above-mentioned purpose is:
One of the present invention's a kind of new-type numerically-controlled machine temperature-compensated system; Large-size numerical control machine comprises the driver of lathe, servomotor, driving servomotor; Wherein, comprise some be installed on temperature sensor on the described lathe, with transmitter, PLC module, axle module that described temperature sensor links to each other successively, the numerical control unit that an end of described axle module and carries out temperature compensation links to each other; The other end links to each other with described driver, wherein:
Described numerical control unit comprises the numerically-controlled machine interpolation module of the output ideal position that links to each other successively, the correcting module of output physical location and the numerically-controlled machine position control module of outgoing position signal, also comprises the temperature collect module and the temperature compensation computing module of output offset data to correcting module of continuous collecting temperature.
Above-mentioned a kind of new-type numerically-controlled machine temperature-compensated system and compensation method thereof; Wherein, Described temperature compensation computing module is according to the temperature compensation value of the corresponding axle of this temperature of the Current Temperatures data computation that collects lathe constantly; If temperature compensation value is on the occasion of just moving through numerically-controlled machine position control module Control Shaft negative sense, otherwise move with regard to forward.
Above-mentioned a kind of new-type numerically-controlled machine temperature-compensated system and compensation method thereof, wherein, described PLC module comprises-the A/D interface that this A/D interface links to each other to carry out mould/number conversion with described transmitter.
Above-mentioned a kind of new-type numerically-controlled machine temperature-compensated system and compensation method thereof, wherein, described PLC module all links to each other with described axle module with the transmission data through EBI with numerical control unit.
Above-mentioned a kind of new-type numerically-controlled machine temperature-compensated system and compensation method thereof, wherein, described axle module includes an output analog signals and accepts the position feedback module of drive location feedback signal for the D/A modular converter and of driver.
A kind of temperature compensation that is used for large-size numerical control machine of two of the present invention, wherein, it may further comprise the steps:
Acquisition step is gathered current temperature data, is benchmark with certain temperature, measures each site error of corresponding axis, obtains this temperature error curve;
Accounting temperature offset step is calculated this temperature offset constantly, during calculating, adopts following formula to calculate:
△K
x(T)=K
0(T)+tanβ(T)*(Px?-?P0)
Wherein: △ Kx (T) is the positioning error temperature deviation offset of axle Px position;
K0 (T) is and the incoherent temperature deviation of shaft position;
Px is the physical location of axle
P0 is the reference point locations of axle;
Tan β (T) is the temperature compensation coefficient relevant with shaft position, and this temperature compensation coefficient is the angle of positioning error curve;
Revise step, offset data that obtains in the accounting temperature offset step and ideal position data are carried out the motion of computing correction axle;
The output step, if positioning error temperature deviation offset △ Kx (T) is for to carry out position compensation on the occasion of moving with regard to the Control Shaft negative sense, the error of bringing with the elimination thermal effect, otherwise move with regard to forward.
The invention has the beneficial effects as follows: the present invention obtains the actual temperature curve of each position of lathe through temperature sensor; Through temperature compensation compensation rate is exported to driver; Drive servomotor and carry out position compensation, adopt temperature compensation computing module and interpolation module to revise, the compensation rate of output physical location; This system has overcome the shortcoming that the numerically-controlled machine that under common workshop condition condition, uses is prone to produce error, has improved machining precision and bearing accuracy.
Description of drawings
Figure l is one of the present invention's a kind of new-type numerically-controlled machine temperature-compensated system and the structural representation of compensation method thereof;
Fig. 2 is the structural representation of numerical control unit of one of the present invention's a kind of new-type numerically-controlled machine temperature-compensated system and compensation method thereof
Fig. 3 is the process flow diagram of the present invention's two the temperature compensation that is used for large-size numerical control machine;
Fig. 4 is the present invention's two a error curve diagram.
Embodiment
To combine accompanying drawing that the present invention is described further below.
See also figure l and Fig. 2; One of the present invention's a kind of new-type numerically-controlled machine temperature-compensated system and compensation method thereof have been shown among the figure; Large-size numerical control machine comprises lathe 8, servomotor 7, drives the driver 6 of servomotor 7, the present invention includes some be installed on temperature sensor l on the lathe 8, with transmitter 2, PLc module 3, axle module 4 that temperature sensor l links to each other successively, the numerical control unit 5 that an end of axle module 4 and carries out temperature compensation links to each other; The other end links to each other with driver 6; In the present embodiment, temperature sensor l adopts the PT100 sensor, wherein:
Numerical control unit 5 comprises the numerically-controlled machine interpolation module 5l of the output ideal position that links to each other successively, the correcting module 52 of output physical location and the numerically-controlled machine position control module 53 of outgoing position signal; The temperature collect module 55 and the temperature compensation computing module 54 of output offset data that also comprise continuous collecting temperature to correcting module 52; This temperature compensation computing module 54 is according to the temperature compensation value of the corresponding axle of this temperature of the Current Temperatures data computation that collects lathe constantly; If temperature compensation value is on the occasion of just moving through numerically-controlled machine position control module 53 Control Shaft negative senses, otherwise move with regard to forward.
PLC module 3 comprises-A/D interface 3l that this A/D interface 3l links to each other to carry out mould/number conversion with transmitter 2.
Axle module 4 includes the D that an output analog signals is given driver 6, and/A modular converter 4l and accepts the position feedback module 42 of driver 6 position feed back signals.
PLC module 3 all links to each other with axle module 4 with the transmission data through EBI 9 with numerical control unit 5.
Because the hysteresis quality of temperature effect, PLc module 3 is taked the method for fixed time interval sample temperature (T), periodically revises correlative compensation parameter in the numerically-controlled machine, and sharp accounting temperature deviation, thereby the position deviation that temperature variation produces is fallen in compensation.
Principle of work of the present invention is: a large amount of temperature sensor l need be installed on lathe 8 each positions; To obtain the actual temperature curve map of lathe 8 each position; And the positioning error of machine coordinates axle can be added certain deviation with temperature variation, can measure corresponding positioning error curve for fixed temperature to each; Through transmitter 2 temperature sensor l signal is transferred to the A/D interface 3l of PLC module 3, carries out mould/number conversion, precision is 12 a digital quantity; The EBI 9 of PLC module 3 and the EBI 9 of numerical control unit are sent to axle module 4 with data; Numerical control unit 5 carries out temperature compensation and calculates; Result of calculation is sent to axle module 4 through bus, the D on the axle module 4, and/A modular converter 4l converts the analog quantity of 16 precision to, gives driver 6, drives servomotor 7 and carries out position compensation.
See also Fig. 3 and Fig. 4, a kind of temperature compensation that is used for large-size numerical control machine of two of the present invention has been shown among the figure, it may further comprise the steps:
Acquisition step sl; Gather current temperature data; With certain temperature is benchmark, measures each site error of corresponding axis, obtains this temperature error curve; Change in location during promptly according to the measurement different temperatures is drawn out the change curve of temperature and position, and error changes slope etc. when calculating each temperature;
Accounting temperature offset step s2 calculates this temperature offset constantly, during calculating, adopts following formula to calculate:
△K
x(T)=K
0(T)+tanβ(T)*(Px?-?P0)
Wherein: △ Kx (T) is the positioning error temperature deviation offset of axle Px position;
K0 (T) is and the incoherent temperature deviation of shaft position;
Px is the physical location of axle
P0 is the reference point locations of axle;
Tan β (T) is the temperature compensation coefficient relevant with shaft position, and this temperature compensation coefficient is the angle of positioning error curve;
Revise step s3, offset data that obtains in the accounting temperature offset step and ideal position data are carried out the motion of computing correction axle;
Output step s4, if positioning error temperature deviation offset △ Kx (T) is for to carry out position compensation on the occasion of moving with regard to the Control Shaft negative sense, the error of bringing with the elimination thermal effect, otherwise move with regard to forward.
Above embodiment only supplies to explain the present invention's usefulness, but not to the restriction of protection domain of the present invention.The technician in relevant present technique field under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or modification, and the technical scheme that all are equal to also should belong within the category of the present invention's protection, is limited each claim.
Claims (2)
1. new-type numerically-controlled machine temperature-compensated system and compensation method thereof; Large-size numerical control machine comprises the driver of lathe, servomotor, driving servomotor; It is characterized in that; Comprise some transmitter, PLC module, axle modules that are installed on temperature sensor on the described lathe, link to each other successively with described temperature sensor; The numerical control unit that one end of described axle module and carries out temperature compensation links to each other; The other end links to each other with described driver, and wherein: described numerical control unit comprises the numerically-controlled machine interpolation module of the output ideal position that links to each other successively, the correcting module of output physical location and the numerically-controlled machine position control module of outgoing position signal, also comprises the temperature collect module and the temperature compensation computing module of output offset data to correcting module of continuous collecting temperature; Described temperature compensation computing module is according to the temperature compensation value of the corresponding axle of this temperature of the Current Temperatures data computation that collects lathe constantly; If temperature compensation value is on the occasion of just moving through numerically-controlled machine position control module Control Shaft negative sense, otherwise move with regard to forward; Described PLC module comprises the A/D interface, and this A/D interface links to each other with described transmitter to carry out mould/number conversion, and the PLC module all links to each other with described axle module with the transmission data through EBI with numerical control unit; Described axle module includes an output analog signals and accepts the position feedback module of drive location feedback signal for the D/A modular converter and of driver.
2. new-type numerically-controlled machine temperature-compensated system and compensation method thereof is characterized in that it may further comprise the steps:
Acquisition step is gathered current temperature data, is benchmark with certain temperature, measures each site error of corresponding axis, obtains this temperature error curve;
Accounting temperature offset step is calculated this temperature offset constantly, during calculating, adopts following formula to calculate:
△Kx(T)=K0(T)+tan?β(T)*(Px?-?P0)
Wherein: △ Kx (T) is the positioning error temperature deviation offset of axle Px position;
K0 (T) is and the incoherent temperature deviation of shaft position;
Px is the physical location of axle
P0 is the reference point locations of axle;
Tan β (T) is the temperature compensation coefficient relevant with shaft position, and this temperature compensation coefficient is the angle of positioning error curve; Revise step, offset data that obtains in the accounting temperature offset step and ideal position data are carried out the motion of computing correction axle; The output step, if positioning error temperature deviation offset △ Kx (T) is for to carry out position compensation on the occasion of moving with regard to the Control Shaft negative sense, the error of bringing with the elimination thermal effect, otherwise move with regard to forward.
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| CN2010105533485A CN102478823A (en) | 2010-11-22 | 2010-11-22 | Novel system and method for compensating temperature of numerical control machine tool |
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| CN2010105533485A CN102478823A (en) | 2010-11-22 | 2010-11-22 | Novel system and method for compensating temperature of numerical control machine tool |
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| CN105242570A (en) * | 2015-10-12 | 2016-01-13 | 哈尔滨工业大学 | Aircraft-to-sun relationship ground simulation device |
| CN105807714A (en) * | 2014-12-31 | 2016-07-27 | 佛山市诺威科技有限公司 | False tooth machine tool thermal error online temperature compensation method |
| CN107608310A (en) * | 2017-10-18 | 2018-01-19 | 中国水利水电第十工程局有限公司 | The temperature compensation system and its method of Digit Control Machine Tool machining spindle |
| CN108897271A (en) * | 2018-06-15 | 2018-11-27 | 四川川润液压润滑设备有限公司 | A kind of fluid device multi-channel data acquisition processing unit |
| CN113043061A (en) * | 2020-11-23 | 2021-06-29 | 宝鸡忠诚机床股份有限公司 | Method for obtaining thermal temperature rise error compensation quantity of numerical control machine tool workbench |
| CN113377067A (en) * | 2021-05-27 | 2021-09-10 | 意特利（上海）科技有限公司 | Dynamic sensing monitoring acquisition compensation method and device for numerical control five-axis linkage machine tool |
| CN113422606A (en) * | 2021-07-06 | 2021-09-21 | 珠海格力电器股份有限公司 | Error calibration method and device for AD converter, controller and servo driver |
| CN113715022A (en) * | 2021-09-01 | 2021-11-30 | 东南大学 | Temperature error compensation system and method of force feedback device |
| CN113741343A (en) * | 2021-11-08 | 2021-12-03 | 东莞市宝科精密机械有限公司 | Machine tool double-shaft synchronous control method and system and machine tool |
| CN116871748A (en) * | 2023-06-28 | 2023-10-13 | 宁波尚进自动化科技有限公司 | Temperature compensation device and method for force control system |
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2010
- 2010-11-22 CN CN2010105533485A patent/CN102478823A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105807714A (en) * | 2014-12-31 | 2016-07-27 | 佛山市诺威科技有限公司 | False tooth machine tool thermal error online temperature compensation method |
| CN105807714B (en) * | 2014-12-31 | 2018-05-01 | 佛山市诺威科技有限公司 | A kind of online temperature-compensation method of artificial tooth machining tool Thermal Error |
| CN105242570A (en) * | 2015-10-12 | 2016-01-13 | 哈尔滨工业大学 | Aircraft-to-sun relationship ground simulation device |
| CN107608310A (en) * | 2017-10-18 | 2018-01-19 | 中国水利水电第十工程局有限公司 | The temperature compensation system and its method of Digit Control Machine Tool machining spindle |
| CN107608310B (en) * | 2017-10-18 | 2019-11-05 | 中国水利水电第十工程局有限公司 | The temperature compensation system and its method of numerically-controlled machine tool machining spindle |
| CN108897271A (en) * | 2018-06-15 | 2018-11-27 | 四川川润液压润滑设备有限公司 | A kind of fluid device multi-channel data acquisition processing unit |
| CN113043061B (en) * | 2020-11-23 | 2023-11-14 | 宝鸡忠诚机床股份有限公司 | Method for obtaining thermal temperature rise error compensation quantity of workbench of numerical control machine tool |
| CN113043061A (en) * | 2020-11-23 | 2021-06-29 | 宝鸡忠诚机床股份有限公司 | Method for obtaining thermal temperature rise error compensation quantity of numerical control machine tool workbench |
| CN113377067A (en) * | 2021-05-27 | 2021-09-10 | 意特利（上海）科技有限公司 | Dynamic sensing monitoring acquisition compensation method and device for numerical control five-axis linkage machine tool |
| CN113422606A (en) * | 2021-07-06 | 2021-09-21 | 珠海格力电器股份有限公司 | Error calibration method and device for AD converter, controller and servo driver |
| CN113422606B (en) * | 2021-07-06 | 2023-08-11 | 珠海格力电器股份有限公司 | AD converter error calibration method, device, controller and servo driver |
| CN113715022B (en) * | 2021-09-01 | 2022-08-02 | 东南大学 | Temperature error compensation system and method of force feedback device |
| CN113715022A (en) * | 2021-09-01 | 2021-11-30 | 东南大学 | Temperature error compensation system and method of force feedback device |
| CN113741343A (en) * | 2021-11-08 | 2021-12-03 | 东莞市宝科精密机械有限公司 | Machine tool double-shaft synchronous control method and system and machine tool |
| CN113741343B (en) * | 2021-11-08 | 2022-02-08 | 东莞市宝科精密机械有限公司 | Machine tool double-shaft synchronous control method and system and machine tool |
| CN116871748A (en) * | 2023-06-28 | 2023-10-13 | 宁波尚进自动化科技有限公司 | Temperature compensation device and method for force control system |
| CN116871748B (en) * | 2023-06-28 | 2024-03-26 | 宁波尚进自动化科技有限公司 | Temperature compensation device and method for force control system |
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Application publication date: 20120530 |