CN105415092A - Temperature compensation method for motorized spindle of numerical control machine tool - Google Patents
Temperature compensation method for motorized spindle of numerical control machine tool Download PDFInfo
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- CN105415092A CN105415092A CN201610013163.2A CN201610013163A CN105415092A CN 105415092 A CN105415092 A CN 105415092A CN 201610013163 A CN201610013163 A CN 201610013163A CN 105415092 A CN105415092 A CN 105415092A
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- temperature
- electro spindle
- machine tool
- temperature compensation
- control machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
Abstract
The invention discloses a temperature compensation method for a motorized spindle of a numerical control machine tool. The temperature compensation method includes the following steps of measuring the temperature, at different rotating speeds, of the motorized spindle through a temperature sensor, and inputting the real-time temperature into a temperature control device, wherein the interval between every two adjacent times of measurement is the first preset time; keeping the motorized spindle for the second preset time at different rotating speeds, and measuring the thermal elongation, at different rotating speeds, of the motorized spindle through a tool checking instrument; establishing the nonlinear curve between temperature changes and the thermal elongation according to the measured real-time temperature and the thermal elongation; reading the temperature in a temperature control device through a file memory of a PLC, and calculating the thermal elongation, serving as the temperature compensation amount, of the motorized spindle according to the linear relation determined by the tangent line of the point, corresponding to the temperature, on the nonlinear curve; compensating the external machinery coordination offset of the numerical control machine tool for the temperature compensation amount. According to the method, the mechanical structure of the numerical machine tool does not need to be changed, and influences on force bearing of other parts are avoided.
Description
Technical field
The present invention relates to numerical control field, particularly a kind of temperature compensation of electro spindle of Digit Control Machine Tool.
Background technology
High Speed NC Machine Tools is one of the technical foundation and developing direction of equipment manufacture, especially when Mould Machining market.The core component of High Speed NC Machine Tools is electro spindle, and the quality of its performance determines machining accuracy and the production efficiency of whole lathe to a great extent.Electro spindle, compared with the main shaft of ordinary construction, by electric machine built-in in main shaft, saves a series of link such as gear, belt wheel, thus achieves the transmission inertia of main axis transmission system is reduced to minimum object as much as possible.
Electro spindle has compact conformation, lightweight, inertia is little, it is little to vibrate, noise is low, respond the advantages such as fast, not only rotating speed is high, power is large, also has the function of the lathe operational factor such as the temperature rise of a series of control main shaft and vibration, to guarantee its reliability and security run up.By electric machine built-in after spindle unit, inevitably will produce heating problem, thus need the special water-cooled of design or oil cooling device system and temperature compensation function.
The Axial Thermal of high-speed electric main shaft extends the position directly affect cutter, thus causes mismachining tolerance, and the thermal expansion length how measuring high-speed electric main shaft is fast and accurately to studying the dynamic characteristic of electro spindle and developing Intelligent electric main shaft and important.
Frame for movement by changing lathe in prior art reduces the Axial Thermal elongation of electro spindle to the impact of machine tool accuracy.But change the change that frame for movement can cause the stressing conditions of miscellaneous part, therefore such solution has very strong limitation.
The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the present invention is to provide a kind of temperature compensation of electro spindle of Digit Control Machine Tool, thus the impact of Axial Thermal elongation on machine tool accuracy overcome by changing frame for movement reduction electro spindle has circumscribed defect.
For achieving the above object, the invention provides a kind of temperature compensation of electro spindle of Digit Control Machine Tool, temperature compensation comprises the steps: the temperature of the electro spindle under serviceability temperature sensor measurement different rotating speeds, wherein interval first scheduled time between adjacent twice measurement, and real time temperature is inputted attemperating unit; Make electro spindle keep for second scheduled time under different rotating speeds, and use tool setting gauge to measure the thermal expansion length of electro spindle under different rotating speeds; The nonlinear curve between variations in temperature and thermal expansion length is set up according to measured real time temperature and thermal expansion length; Use the temperature in the file memory reading attemperating unit of PLC, and calculate the thermal expansion length of electro spindle according to the determined linear relationship of tangent line of point corresponding with temperature on nonlinear curve, as amount of temperature compensation; Amount of temperature compensation is compensated in the exterior mechanical coordinate offset of Digit Control Machine Tool.
Preferably, in technique scheme, first scheduled time was 18-22 minute.
Preferably, in technique scheme, second scheduled time was 15-20 minute.
Preferably, in technique scheme, linear relationship is following formula: the normal temperature length of temperature simulation amount * 100/205-(deducting) electro spindle of thermal expansion length=electro spindle, and wherein, the temperature simulation amount of electro spindle exports PLC to by attemperating unit.
Preferably, in technique scheme, temperature sensor is non-contact temperature sensor.
Compared with prior art, the present invention has following beneficial effect:
The present invention, without the need to making change to the frame for movement of Digit Control Machine Tool, avoids making a difference to the stressed of miscellaneous part, is compensated to by the thermal expansion length that the lifting of temperature causes in exterior mechanical coordinate offset, and the basis keeping low cost solves thermal stretching problem.
Accompanying drawing explanation
Fig. 1 is the temperature compensation means of the electro spindle according to Digit Control Machine Tool of the present invention.
Fig. 2 is the flow chart of the temperature compensation of electro spindle according to Digit Control Machine Tool of the present invention.
Fig. 3 is the measurement result according to real time temperature of the present invention.
Fig. 4 is the measurement result according to thermal expansion length of the present invention.
Fig. 5 is according to the nonlinear curve between variations in temperature of the present invention and thermal expansion length.
Fig. 6 is the calculating ladder diagram according to PLC of the present invention.
Main Reference Numerals illustrates:
The original circuit of 1-, 2-attemperating unit.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of detailed description of the invention.
Clearly represent unless otherwise other, otherwise in whole description and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or part, and do not get rid of other element or other part.
As shown in Figure 1, according to the present invention, original circuit 1 of Digit Control Machine Tool adds attemperating unit 2, for the real time temperature of the electro spindle (its axis extends along Z-direction) measured by collecting temperature sensor.Due to attemperating unit 2 output is analog quantity, and its signal demand of system acquisition adopts analog input output module, therefore also add analog input output module (not shown) in circuit.
As shown in Figure 2, comprise the steps: according to the temperature compensation of the electro spindle of the Digit Control Machine Tool of the specific embodiment of the present invention
S1: measure the temperature of electro spindle under different rotating speeds
Use the temperature of the electro spindle under non-contact temperature sensor measurement different rotating speeds, wherein interval first scheduled time between adjacent twice measurement, and by measured real time temperature input attemperating unit 2, the real time temperature of display electro spindle under different rotating speeds, as shown in Figure 3.Preferably, first scheduled time was 18-22 minute, was more preferably 20 minutes.
S2: measure the thermal expansion length of electro spindle under different rotating speeds
Need to use tool setting gauge to measure the length variations of cutter, thus obtain the thermal expansion length of electro spindle.Because the thermal stretching of electro spindle lags behind variations in temperature, so electro spindle needs thermal expansion length after a certain rotating speed kept for second scheduled time just can remain unchanged.Known to actual measurement, second scheduled time was 15-20 minute.The measurement result of the thermal expansion length of the electro spindle under different rotating speeds as shown in Figure 4.
S3: set up the non-linear relation between variations in temperature and thermal expansion length according to above-mentioned measured real time temperature and thermal expansion length, curve as shown in Figure 5.
S4: the amount of temperature compensation under utilizing PLC to calculate certain temperature
In the temperature-compensating of reality, after using the file memory of PLC to read the temperature data in attemperating unit 2, PLC calculates the thermal expansion length of electro spindle, as amount of temperature compensation according to the determined temperature of tangent line of point corresponding with this temperature on above-mentioned nonlinear curve and the linear relationship of thermal expansion length.
This linear relationship is following formula:
The normal temperature length of the temperature simulation amount * 100/205-electro spindle of thermal expansion length=electro spindle
Wherein, the temperature simulation amount of electro spindle exports PLC to by attemperating unit 2.
That is, PLC can use * instruction, D/ instruction and D-command calculations go out corresponding thermal expansion length according to above-mentioned linear relationship, please ladder diagram as shown in Figure 6.
S5: said temperature compensation rate is compensated in the Z axis exterior mechanical coordinate offset of Digit Control Machine Tool.
The present invention, without the need to making change to the frame for movement of Digit Control Machine Tool, avoids making a difference to the stressed of miscellaneous part, is compensated to by the thermal expansion length that the lifting of temperature causes in exterior mechanical coordinate offset, and the basis keeping low cost solves thermal stretching problem.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (5)
1. a temperature compensation for the electro spindle of Digit Control Machine Tool, is characterized in that, described temperature compensation comprises the steps:
The temperature of the described electro spindle under serviceability temperature sensor measurement different rotating speeds, wherein interval first scheduled time between adjacent twice measurement, and by described real time temperature input attemperating unit;
Make described electro spindle keep for second scheduled time under different rotating speeds, and use tool setting gauge to measure the thermal expansion length of described electro spindle under different rotating speeds;
The nonlinear curve between variations in temperature and thermal expansion length is set up according to measured real time temperature and thermal expansion length;
The file memory of use PLC reads the temperature in described attemperating unit, and calculates the thermal expansion length of described electro spindle according to the determined linear relationship of tangent line of point corresponding with described temperature on described nonlinear curve, as amount of temperature compensation;
Described amount of temperature compensation is compensated in the exterior mechanical coordinate offset of described Digit Control Machine Tool.
2. the temperature compensation of the electro spindle of Digit Control Machine Tool according to claim 1, is characterized in that, described first scheduled time is 18-22 minute.
3. the temperature compensation of the electro spindle of Digit Control Machine Tool according to claim 2, is characterized in that, described second scheduled time is 15-20 minute.
4. the temperature compensation of the electro spindle of Digit Control Machine Tool according to claim 1, is characterized in that, described linear relationship is following formula:
The normal temperature length of the temperature simulation amount * 100/205-electro spindle of thermal expansion length=electro spindle
Wherein, the temperature simulation amount of described electro spindle exports described PLC to by described attemperating unit.
5. the temperature compensation of the electro spindle of Digit Control Machine Tool according to claim 1, is characterized in that, described temperature sensor is non-contact temperature sensor.
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| CN201610013163.2A CN105415092A (en) | 2016-01-07 | 2016-01-07 | Temperature compensation method for motorized spindle of numerical control machine tool |
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| CN201610013163.2A CN105415092A (en) | 2016-01-07 | 2016-01-07 | Temperature compensation method for motorized spindle of numerical control machine tool |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798695A (en) * | 2016-04-18 | 2016-07-27 | 安徽省捷甬达智能机器有限公司 | Temperature rise compensation method for machine tool |
| CN105867301A (en) * | 2016-04-18 | 2016-08-17 | 安徽省捷甬达智能机器有限公司 | Numerical control machine tool temperature compensating method based on error adaptation |
| CN105892401A (en) * | 2016-04-18 | 2016-08-24 | 安徽省捷甬达智能机器有限公司 | Machine tool motion compensation method based on temperature differences |
| CN106444628A (en) * | 2016-09-28 | 2017-02-22 | 大连理工大学 | Numerically-controlled machine tool spindle thermal extension error real-time compensation method |
| CN107598719A (en) * | 2017-10-18 | 2018-01-19 | 中国水利水电第十工程局有限公司 | Five-axle linkage precision grinder with compensation system |
| CN109352424A (en) * | 2018-09-18 | 2019-02-19 | 东莞市皓晟实业有限公司 | Electric main shaft of digital control machine tool temperature-compensation method and device |
| CN110174872A (en) * | 2019-06-25 | 2019-08-27 | 东莞市福思特科技有限公司 | A kind of numerically-controlled machine tool temperature rise compensation system and method |
| CN111168457A (en) * | 2019-12-31 | 2020-05-19 | 东莞市皓晟实业有限公司 | Numerical control machine tool spindle preheating control method and device |
| CN112809451A (en) * | 2020-12-31 | 2021-05-18 | 沈机（上海）智能系统研发设计有限公司 | Machine tool spindle temperature correction method, thermal elongation compensation method, medium, and machine tool |
| CN113263230A (en) * | 2021-06-07 | 2021-08-17 | 浙江陀曼精密机械有限公司 | Thermal compensation mechanism of gear hobbing machine |
| CN114043314A (en) * | 2021-12-06 | 2022-02-15 | 珠海格力智能装备有限公司 | Processing method, processing device, nonvolatile storage medium, and processing apparatus |
| CN114905056A (en) * | 2022-05-10 | 2022-08-16 | 江西佳时特精密机械有限责任公司 | Electric spindle thermal balance management system with feedback and set temperature determination method |
| CN114952416A (en) * | 2022-06-08 | 2022-08-30 | 廊坊精雕数控机床制造有限公司 | Spindle evaluating device and method |
| CN115256047A (en) * | 2022-09-01 | 2022-11-01 | 珠海格力智能装备技术研究院有限公司 | Method and device for detecting thermal elongation of spindle of numerical control machine tool and numerical control machine tool |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105867301A (en) * | 2016-04-18 | 2016-08-17 | 安徽省捷甬达智能机器有限公司 | Numerical control machine tool temperature compensating method based on error adaptation |
| CN105892401A (en) * | 2016-04-18 | 2016-08-24 | 安徽省捷甬达智能机器有限公司 | Machine tool motion compensation method based on temperature differences |
| CN105798695B (en) * | 2016-04-18 | 2018-03-13 | 安徽省捷甬达智能机器有限公司 | A kind of lathe temperature rise compensation method |
| CN105798695A (en) * | 2016-04-18 | 2016-07-27 | 安徽省捷甬达智能机器有限公司 | Temperature rise compensation method for machine tool |
| CN106444628A (en) * | 2016-09-28 | 2017-02-22 | 大连理工大学 | Numerically-controlled machine tool spindle thermal extension error real-time compensation method |
| CN106444628B (en) * | 2016-09-28 | 2018-10-16 | 大连理工大学 | A kind of main shaft of numerical control machine tool thermal stretching real-time error compensation method |
| CN107598719A (en) * | 2017-10-18 | 2018-01-19 | 中国水利水电第十工程局有限公司 | Five-axle linkage precision grinder with compensation system |
| CN109352424A (en) * | 2018-09-18 | 2019-02-19 | 东莞市皓晟实业有限公司 | Electric main shaft of digital control machine tool temperature-compensation method and device |
| CN110174872A (en) * | 2019-06-25 | 2019-08-27 | 东莞市福思特科技有限公司 | A kind of numerically-controlled machine tool temperature rise compensation system and method |
| CN111168457B (en) * | 2019-12-31 | 2021-12-21 | 瓦特创新科学技术(深圳)有限公司 | Numerical control machine tool spindle preheating control method and device |
| CN111168457A (en) * | 2019-12-31 | 2020-05-19 | 东莞市皓晟实业有限公司 | Numerical control machine tool spindle preheating control method and device |
| CN112809451A (en) * | 2020-12-31 | 2021-05-18 | 沈机（上海）智能系统研发设计有限公司 | Machine tool spindle temperature correction method, thermal elongation compensation method, medium, and machine tool |
| CN112809451B (en) * | 2020-12-31 | 2022-10-25 | 沈机（上海）智能系统研发设计有限公司 | Machine tool spindle temperature correction method, thermal elongation compensation method, medium, and machine tool |
| CN113263230A (en) * | 2021-06-07 | 2021-08-17 | 浙江陀曼精密机械有限公司 | Thermal compensation mechanism of gear hobbing machine |
| CN113263230B (en) * | 2021-06-07 | 2022-01-18 | 浙江陀曼智能科技股份有限公司 | Thermal compensation mechanism of gear hobbing machine |
| CN114043314A (en) * | 2021-12-06 | 2022-02-15 | 珠海格力智能装备有限公司 | Processing method, processing device, nonvolatile storage medium, and processing apparatus |
| CN114905056A (en) * | 2022-05-10 | 2022-08-16 | 江西佳时特精密机械有限责任公司 | Electric spindle thermal balance management system with feedback and set temperature determination method |
| CN114905056B (en) * | 2022-05-10 | 2023-10-03 | 江西佳时特精密机械有限责任公司 | Motorized spindle thermal balance management system with feedback and set temperature determining method |
| CN114952416A (en) * | 2022-06-08 | 2022-08-30 | 廊坊精雕数控机床制造有限公司 | Spindle evaluating device and method |
| CN115256047A (en) * | 2022-09-01 | 2022-11-01 | 珠海格力智能装备技术研究院有限公司 | Method and device for detecting thermal elongation of spindle of numerical control machine tool and numerical control machine tool |
| CN115256047B (en) * | 2022-09-01 | 2024-02-27 | 珠海格力智能装备技术研究院有限公司 | Method and device for detecting thermal elongation of main shaft of numerical control machine tool and numerical control machine tool |
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