CN102218679A - High-speed machine tool thermal error compensation device based on giant magnetostrictive drive - Google Patents
High-speed machine tool thermal error compensation device based on giant magnetostrictive drive Download PDFInfo
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- CN102218679A CN102218679A CN2011101288686A CN201110128868A CN102218679A CN 102218679 A CN102218679 A CN 102218679A CN 2011101288686 A CN2011101288686 A CN 2011101288686A CN 201110128868 A CN201110128868 A CN 201110128868A CN 102218679 A CN102218679 A CN 102218679A
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- machine tool
- guide rod
- error compensation
- slide block
- compensation device
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Abstract
The invention discloses a high-speed machine tool thermal error compensation device based on giant magnetostrictive drive. A super magnetic rod (8) and a coil (9) are coaxially arranged inside a shell (10) and are fixed through an end cover (5) and a bolt (6); the end cover (5) and the shell (10) are made of magnetic materials and form a closed magnetic circuit with the super magnetic rod (8) together; one end of a guide rod (4) is butted with the super magnetic rod (8) and a spring (7) is arranged between the guide rod (4) and the end cover (5); the other end of the guide rod (4) is connected to a slide block (2) through a pin (3); the slide block (2) is arranged on a guide rail (1) in a sliding mode; and a universal cutter for a machine tool is arranged on the slide block (2). The device has a rapid dynamic response characteristic, can further improve the machining accuracy by adopting a closed loop feedback link, and has high accuracy and high frequency response error compensation.
Description
Technical field
The invention discloses a kind of heat error compensation device, particularly relate to a kind of high-speed machine tool heat error compensation device that drives based on ultra-magnetic telescopic, mainly be applicable to high-speed cutting processing.
Background technology
Along with development in science and technology and manufacturing demand, an important development trend is processed in high-speed cutting.Along with the raising of rotating speed, the electric chief axis system heating is violent rises, and thermal deformation also increases rapidly, and mismachining tolerance also increases thereupon.Present closed-loop control still can't realize thermal deformation is caused the compensation of mismachining tolerance.High-speed machine tool adopts water-cooled to reduce the axis system temperature rise usually at present, reduces mismachining tolerance.Temperature rise can't be avoided, and this method can only reduce mismachining tolerance to a certain extent.Now machine tool error compensation key technology comprises high accuracy detection and high accuracy, high frequency response cutter drives.The fast development of detection technique, and the further investigation of aspect such as lathe neutral net are the important support of machine tool error compensation.
Giant magnetostrictive material have dependent variable big (1300～2000ppm), power output reaches the fast advantage of response speed greatly, can realize high frequency, Accuracy Error compensation based on super-magnetostrictive drive.
Summary of the invention
Technical problem to be solved by this invention provides the high-speed machine tool heat error compensation device based on the ultra-magnetic telescopic driving of a kind of high accuracy, high frequency response error compensation.
For solving the problems of the technologies described above, the high-speed machine tool heat error compensation device that drives based on ultra-magnetic telescopic provided by the invention, super bar magnet and coil concentric are installed in the enclosure and are fixed with end cap and screw, described end cap and described shell are permeability magnetic material, constitute closed magnetic circuit jointly with described super bar magnet, guide rod one end docks with described super bar magnet and be provided with spring between described guide rod and described end cap, the other end of described guide rod is connected on the slide block by pin, described slide block is slidingly mounted on the guide rail, and the lathe universal cutter is installed on the described slide block.
Described end cap has guide effect with the hole that described guide rod cooperates.
Described pin adopts threaded pin to connect described guide rod and described slide block, with for convenience detach.
Described super bar magnet adopts high-performance TbDyFe giant magnetostrictive material, and it not only has higher magnetostriction performance, and bigger power output, energy density height, response speed is fast, control accuracy is high characteristics are arranged.
The course of work of the present invention is sketched in following: to the control of driver, realized by PLC, control circuit and power supply.Control signal or data are at first obtained to be delivered to PLC by detection system, through the PLC calculation process, export corresponding analog quantity then.The analog quantity of PLC output makes control circuit export corresponding electric current as the input of control circuit.The coil of driver produces the excitation field of varying strength under the different functions of current, super bar magnet produces different elongations under different magnetic field intensity, and super bar magnet and returning spring make guide rod and slide block produce certain displacement, and then make cutter produce corresponding compensation.
The control signal of above-mentioned input PLC or error information can be obtained by number of ways.During batch machining, can directly error be written to the PLC program then by the mismachining tolerance of measuring workpieces.Also can be by measuring the key point temperature that influences machine finish in real time, the control signal as PLC compensates.At different type control datas, need carry out corresponding measurements and calculations, write the relevant PLC program then.
In sum, the present invention adopts giant magnetostrictive rod to drive, and can satisfy the requirement of high accuracy and the corresponding compensation of high frequency.The present invention has stronger autgmentability simultaneously, compensates at dissimilar error informations.That this structure has is simple in structure, easy to use, compensation accurately, be applicable to the high-speed, high precision machining.
The favourable benefit that the present invention has: can use the compensation data of multiple different detection modes, control mode is flexible, and autgmentability is strong.Can be installed on the different lathes, realize high frequency response, high accuracy error compensation, improve machining accuracy.
Description of drawings
Fig. 1 is based on ultra-magnetic telescopic error-compensating apparatus structure chart;
Fig. 2 error compensation system fundamental diagram;
Fig. 3 error-compensating apparatus installation diagram.
The specific embodiment
1) referring to Fig. 1, super bar magnet 8 adopts high-performance TbDyFe giant magnetostrictive material, super bar magnet 8 is installed in the shell 10 and with end cap 5 and screw 6 with coil 9 concentrics and fixes, end cap 5 and shell 10 are permeability magnetic material, with super bar magnet 8 common formation closed magnetic circuits, guide rod 4 one ends dock with super bar magnet 8 and be provided with spring 7 between guide rod 4 and end caps 5, the other end of guide rod 4 is connected on the slide block 2 by threaded pin 3, slide block 2 is slidingly mounted on the guide rail 1, the lathe universal cutter is installed on the slide block 2, and end cap 5 has guide effect with the hole that guide rod 4 cooperates.
Its operation principle has detection system to record mismachining tolerance referring to Fig. 2, and error is fed back to PLC with the form of analog quantity, through the PLC calculation process, exports the correspondent voltage analog quantity then.The analog quantity of PLC output makes control circuit export corresponding electric current as the input of control circuit.The coil 9 of driver produces the excitation field of varying strength under the different functions of current, super bar magnet 8 produces different elongations under different magnetic field intensity, and super bar magnet 8 and spring 7 make guide rod 4 and slide block 2 produce certain displacement, and then make cutter produce corresponding compensation.
Referring to Fig. 3, error-compensating apparatus is assemblied on the turning center cutterhead, compensation arrangement 11, cutterhead 12, tool changing motor 13.Radially mismachining tolerance is mainly derived from the thermal deformation of electric main shaft along directions X for turning center, so compensation arrangement is installed on the cutterhead, can compensate the thermal deformation of main shaft along directions X.
Be applicable to the hot error modeling of batch process: this method is by measuring the error of processing parts, compensating to follow-up process.Along with the continuity of machine tooling time, error is also in continuous variation.It is continuous that the hot error of lathe changes, and can progressively improve machining accuracy by the method that hot error is constantly compensated.Wherein the radially processing of part can accurately be measured by laser sensor, then error amount is corresponded to the input current of super mangneto driving compensation apparatus, carries out error compensation.
A kind of error modeling method that can be used for real-Time Compensation: the hot error modeling based on RBF (Radial Basis Function) neutral net has good fitness and dynamic prediction compensation ability.Research at present thinks that the mismachining tolerance that thermal deformation of machine tool causes and the variations in temperature of some key point are in close relations.With certain model turning center is example, knows by modeling analysis, and coolant temperature, lathe bed top, X-axis nut and main spindle box temperature are bigger to the mismachining tolerance correlation.Mismachining tolerance during by actual measurement lathe key point different temperatures, the corresponding relation of formulation temperature and mismachining tolerance.In actual compensation process, obtain the mismachining tolerance respective value by measuring the key point temperature.Import corresponding electric current by control circuit to compensation arrangement then, export corresponding compensation rate.
Claims (4)
1. high-speed machine tool heat error compensation device that drives based on ultra-magnetic telescopic, it is characterized in that: super bar magnet (8) is installed in the shell (10) and with end cap (5) and screw (6) with coil (9) concentric and fixes, described end cap (5) and described shell (10) are permeability magnetic material, constitute closed magnetic circuit jointly with described super bar magnet (8), guide rod (4) one ends dock with described super bar magnet (8) and be provided with spring (7) between described guide rod (4) and described end caps (5), the other end of described guide rod (4) is connected on the slide block (2) by pin (3), described slide block (2) is slidingly mounted on the guide rail (1), and the lathe universal cutter is installed on the described slide block (2).
2. the high-speed machine tool heat error compensation device that drives based on ultra-magnetic telescopic according to claim 1 is characterized in that: described super bar magnet (8) adopts high-performance TbDyFe giant magnetostrictive material.
3. the high-speed machine tool heat error compensation device that drives based on ultra-magnetic telescopic according to claim 1 and 2, it is characterized in that: described end cap (5) has guide effect with the hole that described guide rod (4) cooperates.
4. the high-speed machine tool heat error compensation device that drives based on ultra-magnetic telescopic according to claim 1 and 2 is characterized in that: described pin (3) adopts threaded pin to connect described guide rod (4) and described slide block (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101288686A CN102218679A (en) | 2011-05-18 | 2011-05-18 | High-speed machine tool thermal error compensation device based on giant magnetostrictive drive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101288686A CN102218679A (en) | 2011-05-18 | 2011-05-18 | High-speed machine tool thermal error compensation device based on giant magnetostrictive drive |
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| CN102218679A true CN102218679A (en) | 2011-10-19 |
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| CN2011101288686A Pending CN102218679A (en) | 2011-05-18 | 2011-05-18 | High-speed machine tool thermal error compensation device based on giant magnetostrictive drive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282869A (en) * | 2016-08-29 | 2017-01-04 | 东北大学 | A kind of device and method of light-alloy melt magneto vibration solidification |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58171244A (en) * | 1982-03-29 | 1983-10-07 | Mitsubishi Heavy Ind Ltd | Position correcting apparatus for numerically controlled lathe |
| JPS6434631A (en) * | 1987-07-30 | 1989-02-06 | Sentan Kako Kikai Gijutsu Shin | Actuator of ultra magnetic strain member |
| US5947658A (en) * | 1996-09-30 | 1999-09-07 | Samson Aktiengesellschaft | Toolhead for cutting workpieces and method of manufacturing same |
| CN1908431A (en) * | 2006-08-14 | 2007-02-07 | 卢全国 | Over-magnetostriction rod drive membrane pump |
-
2011
- 2011-05-18 CN CN2011101288686A patent/CN102218679A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58171244A (en) * | 1982-03-29 | 1983-10-07 | Mitsubishi Heavy Ind Ltd | Position correcting apparatus for numerically controlled lathe |
| JPS6434631A (en) * | 1987-07-30 | 1989-02-06 | Sentan Kako Kikai Gijutsu Shin | Actuator of ultra magnetic strain member |
| US5947658A (en) * | 1996-09-30 | 1999-09-07 | Samson Aktiengesellschaft | Toolhead for cutting workpieces and method of manufacturing same |
| CN1908431A (en) * | 2006-08-14 | 2007-02-07 | 卢全国 | Over-magnetostriction rod drive membrane pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282869A (en) * | 2016-08-29 | 2017-01-04 | 东北大学 | A kind of device and method of light-alloy melt magneto vibration solidification |
| CN106282869B (en) * | 2016-08-29 | 2017-11-03 | 东北大学 | A kind of device and method of light-alloy melt magneto vibration solidification |
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Application publication date: 20111019 |