CN201239810Y - Magnetic striction compensation mechanism for improving machine precision of numerically controlled lathe - Google Patents
Magnetic striction compensation mechanism for improving machine precision of numerically controlled lathe Download PDFInfo
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- CN201239810Y CN201239810Y CNU2008200421509U CN200820042150U CN201239810Y CN 201239810 Y CN201239810 Y CN 201239810Y CN U2008200421509 U CNU2008200421509 U CN U2008200421509U CN 200820042150 U CN200820042150 U CN 200820042150U CN 201239810 Y CN201239810 Y CN 201239810Y
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- magnetostrictive
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- compensation mechanism
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Abstract
The utility model discloses a magnetostrictive compensation mechanism used for improving the machining precision of a numerically controlled lathe. The magnetostrictive compensation mechanism comprises a base, and a magnetostrictive rod, a coil, an output push rod and a micro displacement mechanism which are arranged on the base. A cutter saddle and a cutter are arranged on the micro displacement mechanism, the magnetostrictive rod is arranged in the coil, one end of the output push rod is connected with one end of the magnetostrictive rod, the other end of the output push rod is connected with micro displacement mechanism for driving the cutter saddle, and a displacement transducer is also arranged at the tail end of the micro displacement mechanism. Compared with the prior art, the magnetostrictive compensation mechanism has the advantages that the inductance type displacement transducer is arranged on the magnetostrictive compensation mechanism, displacement signals sensed by the transducer correct the feed error signals of the magnetostrictive compensation mechanism through the transducer, and the feed compensation precision of micro displacement is improved; a disc spring is also arranged between the magnetostrictive rod and the output push rod, the magnetostrictive rod is prevented from being pulled apart, and the energy conversion efficiency of the driver is greatly improved.
Description
Technical field
The utility model patent relates to a kind of modularization error-compensating apparatus that improves machine finish by combined feed, specifically, relate to a kind of device that by giant magnetostrictive actuator generation micrometric displacement compensation and vibrocutting machine tool error is compensated and improves machine finish.
Background technology
In accurate and Study on Ultraprecision Machining and evolution, accurate and ultra-precision machine tool decisive role.The precision of traditional ultra-precision machine tool mainly is to lean on the precision of the reference element of lathe to reach, yet it is very difficult to rely on the precision that continues raising ultra-precision machine tool parts to improve machining accuracy, and the error of generation is difficult to eliminate in some processing.Therefore, can adopt microfeed mechanism to realize the accurate micro-displacement of cutter, and in process, mismachining tolerance be made corresponding compensation.
Consider that from the angle in lathe mismachining tolerance source the raising precision mainly contains error and prevents method and error (precision) penalty method.Error prevents that method from being to attempt design by lathe and manufacturing approach to eliminate or reduce possible error source.Error compensation method is to produce a kind of new error artificially to remove to offset the current initial error that becomes problem.Though error prevents method and can reduce initial error, make precision and satisfy required precision significant limitation is arranged by improving lathe, even may, cost economically is very expensive often.And error compensation method be a kind of both effectively economical (every compensation implementation cost only for the lathe price 5～10%) raising machine tool accuracy means, can on the not really high lathe of precision, process high-precision part by Error Compensation Technology.Error Compensation Technology not only can be used for new machine tool for producing to improve its technology content, and the transformation that also is suitable for existing lathe is to avoid the purchase high precision machine tool that spends huge sums.
The online detection of machine finish is one and relates to multi-disciplinary complex technologys such as light, electricity, machinery, computer, it is the important component part of in-process measurement integrated technique, being the important step that guarantees the workpiece machining accuracy, also is the difficult problem of current urgent need developmental research.
At present, the actuation element of nanometer, Ethylmercurichlorendimide level ultraprecise navigation system uses piezoceramic material mostly, and its power output is low, and must adopt an effective measure and prevent the problems such as short circuit that impulsive force and high driving voltage cause.Ultra-magnetic telescopic driving element output displacement is tens of times of electrostrictive actuator, but and Low ESR operation.In addition, rare earth ultra-magnetostriction material has that magnetostrictive strain is big, magnetic-machine coefficient of coup height, energy density advantages of higher, is showing wide application prospect aspect the micrometric displacement driving.Magnetostriction materials intrinsic magnetic hysteresis is non-linear also constantly improves along with the development of control theory, but its magnetic hysteresis still is difficult to control, has limited the raising of machine finish greatly, so be difficult to use in practice.
And the cutter of lathe adds man-hour carrying out smear metal, cutter can produce friction because of tool surface and surface of the work interact, the existence of this frictional force, make cutter when feeding, not only have the displacement of straight line, and the vibration that has produced vertical direction, this makes that also the feeding error of cutter can't linearisation and regularization, also is that precision is difficult to another key factor of controlling and improving.
A kind of Ultrasonic machining technology (USM is now also arranged, Ultrasonic Machining), it is to utilize the instrument of ultrasonic vibration in the liquid medium of abrasive material is arranged or in the dry grinding material, the impact, rubbing down, hydraulic shock and the consequent cavitation effect that produce abrasive material remove material, and utilize ultrasonic vibration to make surface of the work produce physical change and the processing method that mutually combines.Early stage Ultrasonic machining mainly dependence instrument is done supersonic frequency (more than the 20000Hz) vibration, make the abrasive material in the suspension obtain impact energy, thereby remove workpiece material and reach processing purpose, this ultrasonic wave process technology is the cost height not only, cost an arm and a leg, and its mechanism of action also is unsuitable for using on lathe.
Summary of the invention
Technical problem to be solved in the utility model is at above-mentioned the deficiencies in the prior art, and a kind of magnetostriction compensation mechanism that combined feed improves machining accuracy of NC machine tool that passes through that applies vibration signal simultaneously is provided.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of magnetostriction compensation mechanism that is used to improve the Digit Control Machine Tool machining accuracy, comprise pedestal and be arranged on giant magnetostrictive rod, coil, output push rod, micro-displacement mechanism on the pedestal, micro-displacement mechanism is provided with knife rest and cutter, described giant magnetostrictive rod setting in coil, one end of described output push rod is connected with an end of giant magnetostrictive rod, the other end of output push rod is fixedlyed connected with micro-displacement mechanism and is used to drive cutter on the micro-displacement mechanism, also is provided with a displacement transducer at the end of described micro-displacement mechanism.
Between described magnetostrictive rod and output push rod, also be provided with one and be used to regulate the dish spring of magnetostrictive rod pretightning force.
Described displacement transducer is LVDT (linear variable difference transformer type) inductive displacement transducer.
Also be provided with inlet of cold air at described pedestal front end, this inlet of cold air is in coil.
Be provided with the distortion groove in the inside of described micro-displacement mechanism.
Compared with prior art, the utility model magnetostriction compensation mechanism has following advantage:
1, the utility model is installed inductive displacement transducer on the magnetostriction compensation mechanism, by this sensor the displacement signal that sensor detects is revised the feeding error signal of magnetostriction compensation mechanism, thereby improved the compensation precision of micrometric displacement feeding;
2, the utility model magnetostriction compensation mechanism also is provided with a dishful of spring between magnetostrictive rod and output push rod, and giant magnetostrictive rod is applied the pretightning force that to regulate size by regulating the pretension screw, prevent that giant magnetostrictive rod from being broken at work, and can significantly improve the energy conversion efficiency of super-magnetostrictive drive.
3, the utility model is provided with the distortion groove in the inside of micro-displacement mechanism, the distortion groove becomes the deformation space when stressed, thereby realize micrometric displacement by the strain after stressed, therefore only there is the interior friction between the elastomeric material interior molecules, very close to each other, have very high displacement resolution, working stability is reliable, the precision good reproducibility.
4, utilize air compressor will cool off air and feed the cooling that circulates in the coil bore, with eliminate or the inhibition variations in temperature to the negative effect of GMM thermal deformation.
5, small and exquisite, the compact conformation, easy to use of accuracy compensation mechanism's volume of the present utility model embeds dsp chip in the mechanism, can be used as the general precision calibration module of lathe.
Description of drawings
Fig. 1 is the inner vertical view of compensation mechanism of the present utility model.
Fig. 2 is gas-tpe fitting of the present utility model, pretension screw junction partial sectional view.
Fig. 3 is the connection diagram of dish spring of the present utility model and push rod.
Fig. 4 is an elasticity micro-displacement mechanism parts cutaway view of the present utility model.
Fig. 5 is the assembling 3-D view of the utility model mechanism.
Among the figure:
The 1-gas-tpe fitting, 2-connector, 3-M6 soket head cap screw, 4-coil 5-pedestal, the 6-magnetostrictive rod, 7-dish spring, 8-push rod, 9-elasticity micro-displacement mechanism, 91-is out of shape groove, 10-fine motion knife rest, 11-M8 soket head cap screw, 12-lathe tool, 13-tracheae (connecing the cooling air), 14-enamel-covered wire (connecing driving voltage), 15-pretension screw, the 16-magnetic conduction sheet, 17-passage, 18-LVDT type inductive displacement transducer, the 19-permanent magnet, 20-lining, 21-workpiece.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
As depicted in figs. 1 and 2, pedestal 5 is box-like, magnetic conduction sheet 16, magnetostrictive rod 6 are placed in the coil rack 4, then four pairs of combination dish springs 7 are nested on the push rod 8, push rod 8 is connected with coil rack 4 and is placed in pedestal 5 boxes, by the screwed hole location assembling on pedestal 5 and the coil rack 14, regulate the suffered pretightning force of magnetostrictive rod 6 by pretension screw 15.Gas-tpe fitting 1 is tightly connected with pedestal 5 by the connector 2 that has internal and external threads, and during work, the cooling air feeds the cooling that circulates by gas-tpe fitting 1 place in passage 17 enters coil rack 14 chambeies.
As shown in Figure 3, dish spring 7 is the ring-type preloading springs that have the conical surface, and having the compression that adds in advance should be strict parallel with the rod axle, equiblibrium mass distribution, and the advantage such as less that takes up room.Dish spring 7 internal diameters should be slightly larger than the external diameter of output push rod 8, are nested in output push rod 8 outsides, adopt 8 involutory modes of disk spring to be combined into a cover preloading spring, to increase the pretension deformation quantity.The other end at magnetostrictive rod 6 adopts 15 rotations of pretension screw to apply appropriate pre _ stress.Permanent magnet 19 is placed between magnetostrictive rod 6 and the output push rod 8, and its effect is to make magnetostrictive rod 6 bring into play more performance under the bias magnetic field effect.
The schematic diagram of elasticity micro-displacement mechanism 9 as shown in Figure 4, be processed with distortion groove 91 in micro-displacement mechanism 9 inside, push rod 8 contacts with elasticity micro-displacement mechanism 9 zero-clearances under the effect of pretension screw 15, when driving voltage 14 makes magnetostrictive rod 6 elongations, deformation takes place and drives with its fine motion knife rest 10 that is connected with M8 soket head cap screw 11 to carry out the micrometric displacement cutting in elasticity micro-displacement mechanism 9, and dish spring 7 is compressed at this moment; When driving voltage 14 diminished, under the resilient force of dish spring 7, elasticity micro-displacement mechanism 9 recovered original-shape, at its terminal LVDT type inductive displacement transducer 18 of installing displacement variable was fed back to DSP and formed closed-loop control.
As shown in Figure 5, pedestal 5 sponsons of modularization compensation mechanism are clamped on the anchor clamps of lathe grinding direction slide carriage, carry out turning processing.Pedestal 5 upper and lower covers are by M6 soket head cap screw 3 and the encapsulation of pedestal 5 housings.
Claims (5)
1, a kind of magnetostriction compensation mechanism that is used to improve the lathe in machining precision, comprise pedestal (5) and be arranged on giant magnetostrictive rod (6) on the pedestal (5), coil (4), output push rod (8), micro-displacement mechanism (9), micro-displacement mechanism (9) is provided with knife rest (10) and cutter (12), described giant magnetostrictive rod (6) is arranged in the coil (4), one end of described output push rod (8) is connected with an end of giant magnetostrictive rod (6), the other end of output push rod (8) is fixedlyed connected with micro-displacement mechanism (9) and is used to drive cutter on the micro-displacement mechanism (9), and it is characterized in that: the end at described micro-displacement mechanism (9) also is provided with a displacement transducer (18).
2, the magnetostriction compensation mechanism that is used to improve the lathe in machining precision according to claim 1, it is characterized in that: also be provided with the dish spring (7) that applies pretightning force between described magnetostrictive rod (6) and output push rod (8), magnetostrictive rod (6) other end is equipped with the pretension adjustment screw (15) of regulating pretightning force.
3, the magnetostriction compensation mechanism that is used to improve the lathe in machining precision according to claim 1 is characterized in that: described displacement transducer (18) is a linear variable difference transformer type inductive displacement transducer.
4, the magnetostriction compensation mechanism that is used to improve the lathe in machining precision according to claim 1 is characterized in that: also be provided with inlet of cold air (13) at described pedestal (5) front end, this inlet of cold air (13) is in coil (4).
5, the magnetostriction compensation mechanism that is used to improve the lathe in machining precision according to claim 1 is characterized in that: be provided with distortion groove (91) in the inside of described micro-displacement mechanism (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200421509U CN201239810Y (en) | 2008-08-01 | 2008-08-01 | Magnetic striction compensation mechanism for improving machine precision of numerically controlled lathe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200421509U CN201239810Y (en) | 2008-08-01 | 2008-08-01 | Magnetic striction compensation mechanism for improving machine precision of numerically controlled lathe |
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| Publication Number | Publication Date |
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| CN201239810Y true CN201239810Y (en) | 2009-05-20 |
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| CNU2008200421509U Expired - Fee Related CN201239810Y (en) | 2008-08-01 | 2008-08-01 | Magnetic striction compensation mechanism for improving machine precision of numerically controlled lathe |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029408A (en) * | 2010-10-27 | 2011-04-27 | 东南大学 | Rare-earth ultra-magnetostrictive actuator-based two-dimensional micro-feeding cutter frame |
| CN102528100A (en) * | 2010-12-29 | 2012-07-04 | 杨锦堂 | Self-feed sensing cutter mechanism |
| CN103586192A (en) * | 2013-11-08 | 2014-02-19 | 华中科技大学 | Double-stimulation ultrasonic elliptical vibration processing device |
| CN104946880A (en) * | 2015-05-29 | 2015-09-30 | 北京交通大学长三角研究院 | Rare earth super-magnetostrictive ultrasonic reinforcement apparatus |
| CN109175536A (en) * | 2018-11-21 | 2019-01-11 | 东台市高科技术创业园有限公司 | A kind of floating type cutting mechanism of metal |
| CN110355598A (en) * | 2019-07-05 | 2019-10-22 | 上海交通大学 | A kind of disk spring type main shaft micro-feed mechanism |
| CN111055149A (en) * | 2020-01-06 | 2020-04-24 | 上海应用技术大学 | Ultra-magnetostrictive micro-feeding device |
-
2008
- 2008-08-01 CN CNU2008200421509U patent/CN201239810Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029408A (en) * | 2010-10-27 | 2011-04-27 | 东南大学 | Rare-earth ultra-magnetostrictive actuator-based two-dimensional micro-feeding cutter frame |
| CN102528100A (en) * | 2010-12-29 | 2012-07-04 | 杨锦堂 | Self-feed sensing cutter mechanism |
| CN103586192A (en) * | 2013-11-08 | 2014-02-19 | 华中科技大学 | Double-stimulation ultrasonic elliptical vibration processing device |
| CN103586192B (en) * | 2013-11-08 | 2015-09-23 | 华中科技大学 | A kind of double excitation ultrasonic elliptical vibratory processing unit (plant) |
| CN104946880A (en) * | 2015-05-29 | 2015-09-30 | 北京交通大学长三角研究院 | Rare earth super-magnetostrictive ultrasonic reinforcement apparatus |
| CN109175536A (en) * | 2018-11-21 | 2019-01-11 | 东台市高科技术创业园有限公司 | A kind of floating type cutting mechanism of metal |
| CN109175536B (en) * | 2018-11-21 | 2020-07-07 | 东台市高科技术创业园有限公司 | Floating cutting mechanism of metal |
| CN110355598A (en) * | 2019-07-05 | 2019-10-22 | 上海交通大学 | A kind of disk spring type main shaft micro-feed mechanism |
| CN111055149A (en) * | 2020-01-06 | 2020-04-24 | 上海应用技术大学 | Ultra-magnetostrictive micro-feeding device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090520 Termination date: 20110801 |