CN102756336A - Optimal adjustment method for silhouette removal in revolution autorotation magneto-rheological finishing - Google Patents
Optimal adjustment method for silhouette removal in revolution autorotation magneto-rheological finishing Download PDFInfo
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- CN102756336A CN102756336A CN2012100438394A CN201210043839A CN102756336A CN 102756336 A CN102756336 A CN 102756336A CN 2012100438394 A CN2012100438394 A CN 2012100438394A CN 201210043839 A CN201210043839 A CN 201210043839A CN 102756336 A CN102756336 A CN 102756336A
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Abstract
The invention relates to an optimal adjustment method for silhouette removal in revolution autorotation magneto-rheological finishing and belongs to the technical field of precise processing of optical curved surface. In order to optimize revolution silhouette removal in the conventional revolution autorotation magneto-rheological finishing technology and to meet the condition that the removal quantity from the edge to the gyration center is increased monotonously, an adjusting device comprising a sliding plate, a lead screw, a lead screw supporting seat and the like is arranged on a base plate of the conventional device, the lead screw is driven to rotate to drive the sliding plate to move relative to the base plate and along the x axis, and a polishing wheel arranged on the sliding plate synchronously moves relative to the base plate and along the x axis, so that the eccentric quantity e of the autorotation axis of the polishing wheel relative to the revolution axis of the polishing wheel can be adjusted quantitatively and controllably, the distance e' between the maximum removal quantity of the autorotation silhouette removal and the axis of revolution is within +/- 1.5 mm, and the revolution silhouette removal after optimal adjustment contributes to modification of the surface shape error of workpieces.
Description
Technical field
The present invention relates to public rotation Technique of Magnetorheological Finishing and device, belong to optical surface precision processing technology field.
Background technology
The magnetorheological polishing that results from later 1980s is compared with classic finishing method, is that confirmable small abrasive nose finishing method is measured in a kind of removal of flexibility, can be used for the polishing of aspheric surface and even free form surface.Magnetic flow liquid is the polishing medium of magnetorheological polishing; It is a kind of intellectual material that under the effect of magnetic field, can harden rapidly; Basis is: ferromagnetic particle, nonferromagnetic polishing powder, base load liquid and stabilizing agent; Ferromagnetic particle adopts the carbonyl iron dust of micron dimension mostly, and the nonferromagnetic polishing powder is generally polish abrasives such as ceria, and base load liquid mainly contains two kinds of water base and oil bases; The purpose of stabilizing agent is to suppress sedimentation and the reunion of particle in base load liquid, the oxidation that slows down ferromagnetic particle simultaneously.Magnetorheological polishing basic principle is shown in Fig. 1 a: along with the rotation of polishing wheel, like ω among Fig. 1 a
1Direction; Magnetic flow liquid 11 is polished takes turns 7 and brings polish 12 into and contact with workpiece 13; Under the effect of polish 12 magnetic fields (magnet and the line of magnetic induction do not draw among Fig. 1 a); Magnetic flow liquid 11 produces rheologies, and iron powder is closely lined up, and presses to the nonferromagnetic polishing powder and the workpiece 13 of fitting plays polishing removal effect to produce shearing force.With ω
1The magnetorheological polishing wheel that rotates resides in when the fixed point polishing is done in the somewhere on the workpiece; On workpiece, should produce the removal profile in the place; Because it is different that the magnetic field effect produces magnetic flow liquid 11 shearing force that different points is produced on workpiece 13 of rheology down; Remove profile and have the different 3D shape of polishing removal amount each point, Fig. 1 b has provided the cross section curve of magnetorheological removal profile in the xz plane.Owing to remove the time that the each point removal amount of profile is proportional to the fixed point polishing; Then driving polishing wheel in the process of surface of the work feeding; The control polishing wheel at the high point of workpiece face shape error place residence time long, residence time is short at workpiece face shape error low spot place, thereby reaches the purpose of certainty ground reduction workpiece face shape error; And the 3D shape of removing profile can directly influence effect and the efficient that workpiece face shape is revised, and it is just extremely important therefore to optimize the shape of removing profile.From more effectively revising the workpiece face shape error, more effectively reducing the workpiece surface roughness angle and consider; Optimum when removing profile and meeting following two shape conditions: the one, remove profile and be the revolution symmetry; The 2nd, from removing dull increase of profile edge to its centre of gyration polishing removal amount, shown in Fig. 2 b.
Shown in Fig. 1 a, the definition polishing wheel is around self axes O
0The motion ω of rotation
1Be rotation, the definition polishing wheel winds the motion ω perpendicular to the axis z rotation of workpiece
2Be revolution.Not do the removal profile that obtains on when revolution workpiece be rotation removal profile when polishing wheel is only done rotation in definition, shown in 14a among Fig. 1 b; The removal profile that had obtained on the workpiece when definition had not only been done rotation but also done revolution when polishing wheel is for revolution removal profile, shown in 14b among Fig. 2 a and Fig. 2 b.Visible by Fig. 1 b; It is not that revolution is symmetrical that profile 14a is removed in rotation; And revolution removal profile is the result of rotation removal profile around revolve round the sun axis rotation and integration in theory, and the obvious removal profile that revolves round the sun is symmetrical around the revolution of polishing wheel revolution axis, shown in 14b among Fig. 2 a and Fig. 2 b.To article one of removing the profile optimal conditions; In order to improve the shortcoming of the non-rotating symmetry of rotation removal profile in the common magnetorheological polishing; Patent documentation discloses " normal axis combined magnetic polishing equipment " (ZL03119281.5); Polishing wheel is taked the compound motion form not only doing rotation but also do revolution in this invention, thereby profile is removed in the revolution that obtains having the revolution symmetric shape.
But simple employing " normal axis combined magnetic polishing equipment " (ZL03119281.5); Revolution is removed profile shown in Fig. 2 a; Do not satisfy from the dull condition that increases of edge to centre of gyration polishing removal amount; Reason is following: Fig. 1 b has provided the cross section curve that profile 14a is removed in rotation in the xz plane, visiblely has side-play amount e without optimizing polishing removal amount maximum that magnetorheological rotation when regulating removes profile and the polishing wheel axis that revolves round the sun
0, e
0Size by the decision of factors such as the own character of spacing, workpiece material of polishing wheel and workpiece, magnetic flow liquid composition, magnetic field intensity, and revolution to remove profile be that the result of profile around rotation of revolution axis and integration removed in rotation in theory because e
0Existence; Profile is removed in revolution when regulating without optimization the cross section curve shown in Fig. 2 a can occur; It is thus clear that it is not dull the increase from edge to centre of gyration polishing removal amount that profile is removed in this revolution, as previously mentioned, the second that profile does not meet optimal conditions is removed in this revolution.
Summary of the invention
The purpose of this invention is to provide the magnetorheological polishing of a kind of public rotation and remove the optimization control method of profile; Time revolution is removed profile from the non-dull problem that increases of edge to centre of gyration polishing removal amount to solve simple employing " normal axis combined magnetic polishing equipment "; Make revolution remove profile either satisfy be the revolution symmetry, but also satisfy from removing dull these two conditions that increase of profile edge to its centre of gyration polishing removal amount, or help the correction of workpiece face shape error.
Technical scheme of the present invention is following:
The optimization control method of profile is removed in the magnetorheological polishing of a kind of public rotation, and it is characterized in that: on the base plate of existing public rotation magnetorheological finishing device, install adjusting device additional, this adjusting device comprises slide plate, leading screw, leading screw supporting base and driving mechanism; Slide plate matches with leading screw through screw pair, can move along x axle straight line relative to base plate along the guide rail on the base plate, and slide plate and polishing wheel bearing block are fixedly connected; The leading screw supporting base is fixedly installed on the base plate, and leading screw is supported by the leading screw supporting base; The drive mechanism leading screw is around himself axis rotation;
Concrete control method: when polishing wheel is only done rotation and do not done revolution; Rotate around himself axis through the drive mechanism leading screw; The polishing wheel that is fixedly installed on the slide plate synchronously moves along x axle straight line relative to base plate with slide plate, thereby regulates the eccentric amount e of polishing wheel rotation axis and revolution axis; Make regulate polishing removal amount maximum that the back rotation removes profile with respect to polishing wheel revolution axis apart from e ' in ± 1.5mm, e '=e-e wherein
0Thereby revolution was removed profile and was optimized when polishing wheel has not only been done rotation but also done revolution, had promptly not only satisfied the revolution symmetry, but also had satisfied from dull these two conditions that increase of edge to centre of gyration polishing removal amount; Wherein, e
0Remove the side-play amount of the relative polishing wheel revolution of the removal amount maximum axis of profile for rotation before regulating.
In the technique scheme, described driving mechanism adopts worm and gear or gear drive.
The present invention compared with prior art has the following advantages and the high-lighting effect:
The present invention is applied to the rotation magnetorheological polishing wheel of just handing over to the collective or the state; Solved the problem that revolution removal profile increases from the non-dullness of edge to centre of gyration polishing removal amount when adopting " normal axis combined magnetic polishing equipment " merely in the prior art; Make revolution remove profile either satisfy be the revolution symmetry, but also satisfy from removing dull these two conditions that increase of profile edge to its centre of gyration polishing removal amount, or help the correction of workpiece face shape error.
Description of drawings
Fig. 1 a is the public rotation compound motion form of the relative workpiece of magnetorheological polishing wheel; Fig. 1 b is that the cross section curve sketch map of profile in the xz plane removed in rotation; Fig. 1 c is the vertical view of Fig. 1 a.
Fig. 2 a removes the cross section curve sketch map of profile in the xz plane for the revolution of optimizing before regulating, and it is from non-dull increase of edge to centre of gyration polishing removal amount; Fig. 2 b removes the cross section curve sketch map of profile in the xz plane for using the present invention by regulating the revolution that obtains behind polishing wheel revolution axis and the rotation axis offset, and it is from dull increase of edge to centre of gyration polishing removal amount.
Fig. 3 is existing public rotation magnetorheological finishing device structural representation.
Fig. 4 is the front view of the specific embodiment of the invention.
Fig. 5 is the vertical view of Fig. 4.
Among the figure: the 1-base plate; The 2-slide plate; The 3-leading screw; 4-leading screw supporting base; 5-polishing wheel bearing block; The 6-polishing wheel axis of rotation; The 7-polishing wheel; 8-permanent magnet supporting base and permanent magnet; The 9-driving mechanism; The 11-magnetic flow liquid; The 12-polish; The 13-workpiece; Profile is removed in the 14a-rotation; Profile is removed in the 14b-revolution; ω
1-polishing wheel sense of rotation; ω
2-polishing wheel revolution direction; The x-x direction of principal axis; The y-y direction of principal axis; The z-z direction of principal axis; O
0-initial the position of polishing wheel rotation axis before regulating; The position of the polishing wheel rotation axis the when offset of the O '-relative revolution in adjusting back axis is e; e
0-side-play amount of the relative polishing wheel revolution of the removal amount maximum axis of profile is removed in rotation before regulating; E-regulates the offset of polishing wheel rotation axis in back with respect to the revolution axis; The distance of the polishing removal amount maximum of profile with respect to polishing wheel revolution axis removed in e '-adjusting back rotation.
The specific embodiment
Below in conjunction with accompanying drawing the principle of the present invention and the specific embodiment are further specified.
The revolution axis of actual public rotation magnetorheological polishing wheel is determined by machine tool structure; Be regarded as fixed reference; The revolution axis is all the time through the center of circle of base plate in the actual machine tool structure, and as shown in Figure 5, therefore following skew relative to the revolution axis is the equal of moving with respect to base plate.Like Fig. 1 a, Fig. 4, shown in Figure 5, with the revolution axis be the z axle, with polishing wheel rotation axis initial position O
0For the y axle is set up coordinate system, to optimize in the present invention and to regulate down, polishing wheel revolves round the sun axis relatively can be along the translation of x axle, but cannot be along the translation of y axle, thereby guarantees that polishing wheel is all the time about the xz plane symmetry in the optimization adjustment process.Basic principle of the present invention is following: the apparent revolution axis is for fixing, and hollow shaft alignment x axle forward translation polishing wheel makes polishing wheel rotation axis from O relatively
0Offset is to O ' position, and the distance of skew is e, then rotation remove profile also respective offsets apart from e, Fig. 1 b dotted line represent the position after the profile skew is removed in rotation, rotation removal profile removal amount maximum revolves round the sun the distance of axis z relatively also by e like this
0Become e ', e '=e-e
0Removing profile in view of revolution is that the result of profile around rotation of revolution axis and integration removed in rotation in theory; E ' just can make the revolution when polishing wheel had not only been done rotation but also done revolution remove profile shown in Fig. 2 b in ± 1.5mm, satisfies from the dull condition that increases of edge to centre of gyration polishing removal amount.E ' for positive situation be the x axial coordinate of the rotation polishing removal amount maximum of removing profile for just, e ' for negative situation be the x axial coordinate of the rotation polishing removal amount maximum of removing profile for bearing, e ' numerical values recited can be 0 but be not limited only to 0.
Fig. 3 is existing public rotation magnetorheological finishing device structural representation; Comprise base plate 1, polishing wheel bearing block 5, the polishing wheel axis of rotation 6, polishing wheel 7, permanent magnet supporting base and permanent magnet 8; A pair of polishing wheel bearing block 5 is fixedly installed on the base plate 1; The polishing wheel axis of rotation 6 is installed on the polishing wheel bearing block 5 through bearing, and polishing wheel 7 is fixedly installed on the polishing wheel axis of rotation 6, and permanent magnet supporting base and permanent magnet 8 are fixedly installed on the polishing wheel bearing block 5.1 drive polishing wheel 7 is revolution motion ω thereby mechanisms such as the motor that does not draw among the figure drive base plate
2, the intersect vertical axis of the revolution axis z and the polishing wheel axis of rotation 6.
Fig. 4 is the front view of specific embodiment of the invention installation diagram; Except that existing base plate 1, polishing wheel bearing block 5, the polishing wheel axis of rotation 6, polishing wheel 7, permanent magnet supporting base and permanent magnet 8, also comprise the adjusting device that the slide plate that on base plate 1, installs additional 2, leading screw 3, leading screw supporting base 4 and driving mechanism 9 that the present invention proposes are formed.Mechanisms such as the motor that does not draw among the figure drive base plate 1 and are revolution motion ω
2, revolution axis z is the center of circle through base plate 1 all the time, and the axis z that will revolve round the sun is regarded as fixed reference with base plate 1, and translation slide plate 2 and polishing wheel 7 are that straight line relative to revolve round the sun axis z and base plate 1 moves in the optimization adjustment process.Mechanisms such as the synchronous band that does not draw among the figure drive polishing wheel 7 and are spinning motion ω
1Slide plate 2 cooperates with leading screw 3 through screw pair, and can move along the x direction of principal axis relative to base plate 1 along the guide rail along leading screw 3 axial directions shown in Figure 5, and a pair of polishing wheel bearing block 5 is fixedly installed on the slide plate 2; Two leading screw supporting bases 4 are fixedly mounted on the base plate 1, and leading screw 3 is by these two leading screw supporting bases, 4 supportings, so relative base plate 1, leading screw 3 only can rotate around self axis, and can not move; Driving mechanism 9 drives leading screw 3 around himself axis rotation, and driving mechanism 9 can be worm and wormwheel, meshed gears etc.The polishing wheel axis of rotation 6 is installed on the polishing wheel bearing block 5 through bearing, and polishing wheel 7 is fixedly mounted on the polishing wheel axis of rotation 6, and permanent magnet supporting base and permanent magnet 8 are fixedly installed on the polishing wheel bearing block 5.
Fig. 5 is the vertical view of specific embodiment of the invention installation diagram, and revolution axis z is through base plate 1 center of circle.Slide plate 2, the polishing wheel 7 that is installed on the slide plate 2 through polishing wheel bearing block 5 all can not translation at the y direction of principal axis; And can only be when leading screw 3 rotates relative base plate 1 along leading screw 3 axial direction translations; Promptly only along the translation of x direction of principal axis, thereby guarantee that polishing wheel 7 is all the time about the xz plane symmetry in the adjustment process.
Do rotation when 7 of polishing wheels and do not do when revolution; Rotating drive mechanism 9 drives leading screw 3 around himself axis rotation, and slide plate 2 relative base plates 1 will be only along leading screw 3 axial direction translations, promptly only along the translation of x direction of principal axis; So polishing wheel 7 also under the drive of slide plate 2 synchronously along relative base plate 1 translation of x direction of principal axis; Promptly revolution axis z shown in two-dot chain line among Fig. 4, thereby realizes polishing wheel rotation axis and the adjusting of the axis eccentric amount e that revolves round the sun along the translation of x direction of principal axis relatively; Make regulate polishing removal amount maximum that the back rotation removes profile and polishing wheel revolve round the sun axis apart from e ' in ± 1.5mm scope, e '=e-e wherein
0, e
0Remove the side-play amount of the relative polishing wheel revolution of the removal amount maximum axis of profile for rotation before regulating; And then the revolution removal profile that makes polishing wheel not only do rotation but also do when revolving round the sun is optimized; Shown in Fig. 2 b; Both having satisfied is the revolution symmetry, satisfy again from dull these two conditions that increase of edge to centre of gyration polishing removal amount, more help revising the workpiece face shape error.
Claims (2)
1. the optimization control method of profile is removed in the magnetorheological polishing of a public rotation; It is characterized in that: on the base plate (1) of existing public rotation magnetorheological finishing device, install adjusting device additional, this adjusting device comprises slide plate (2), leading screw (3), leading screw supporting base (4) and driving mechanism (9); Said slide plate (2) matches with leading screw (3) through screw pair, and moves along x axle straight line relative to base plate along the guide rail on the base plate (1), and slide plate (2) is fixedly connected with polishing wheel bearing block (5); Said leading screw supporting base (4) is fixedly installed on the base plate (1), and leading screw (3) is supported by leading screw supporting base (4); Driving mechanism (9) drives leading screw (3) around himself axis rotation;
Said optimization control method is following: only do rotation when polishing wheel (7) and do not do when revolution; Drive leading screw (3) around himself axis rotation through driving mechanism (9); The polishing wheel (7) that is fixedly installed on the slide plate (2) synchronously moves along x axle straight line relative to base plate (1) with slide plate (2), thereby regulates the eccentric amount e of polishing wheel (7) rotation axis and revolution axis; Make regulate polishing removal amount maximum that the back rotation removes profile (14a) with respect to polishing wheel (7) revolution axis apart from e ' in ± 1.5mm, e '=e-e wherein
0Thereby revolution was removed profile (14b) and was optimized when polishing wheel (7) has not only been done rotation but also done revolution, had promptly not only satisfied the revolution symmetry, but also had satisfied from dull these two conditions that increase of edge to centre of gyration polishing removal amount; Wherein, e
0Remove the side-play amount of the relative polishing wheel revolution of the removal amount maximum axis of profile for rotation before regulating.
2. remove the optimization control method of profile according to the magnetorheological polishing of claims 1 described a kind of public rotation, it is characterized in that: described driving mechanism (9) adopts worm and gear or gear drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210043839.4A CN102756336B (en) | 2012-02-23 | 2012-02-23 | Optimal adjustment method for silhouette removal in revolution autorotation magneto-rheological finishing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210043839.4A CN102756336B (en) | 2012-02-23 | 2012-02-23 | Optimal adjustment method for silhouette removal in revolution autorotation magneto-rheological finishing |
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| CN102756336A true CN102756336A (en) | 2012-10-31 |
| CN102756336B CN102756336B (en) | 2014-08-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692294A (en) * | 2013-11-11 | 2014-04-02 | 中国科学院上海光学精密机械研究所 | Ultrahigh precision processing method for meter-scale optical element |
| CN109129177A (en) * | 2018-07-20 | 2019-01-04 | 中国科学院西安光学精密机械研究所 | A kind of wheeled end burnishing device of public affairs rotation |
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| JPH11347936A (en) * | 1998-06-10 | 1999-12-21 | Ebara Corp | Polishing device |
| CN1872495A (en) * | 2006-06-30 | 2006-12-06 | 西安工业大学 | Magnetic rheologic flexible, fine grinding, polishing equipment and method |
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| CN202088036U (en) * | 2011-05-13 | 2011-12-28 | 清华大学 | Circulation device for revolution and autorotation magnetorheological finishing |
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2012
- 2012-02-23 CN CN201210043839.4A patent/CN102756336B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11347936A (en) * | 1998-06-10 | 1999-12-21 | Ebara Corp | Polishing device |
| CN1872495A (en) * | 2006-06-30 | 2006-12-06 | 西安工业大学 | Magnetic rheologic flexible, fine grinding, polishing equipment and method |
| CN100999062A (en) * | 2007-01-12 | 2007-07-18 | 清华大学 | Integrated magnetic rheological polishing method of mould and parts |
| CN102225517A (en) * | 2011-04-25 | 2011-10-26 | 中国科学院光电技术研究所 | Magnetorheological polishing tool for composite rotary symmetric removal function |
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Non-Patent Citations (1)
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| 左巍等: "公自转磁流变抛光循环装置及其稳定性", 《清华大学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692294A (en) * | 2013-11-11 | 2014-04-02 | 中国科学院上海光学精密机械研究所 | Ultrahigh precision processing method for meter-scale optical element |
| CN103692294B (en) * | 2013-11-11 | 2016-06-08 | 中国科学院上海光学精密机械研究所 | The superhigh precision processing method of rice magnitude optical element |
| CN109129177A (en) * | 2018-07-20 | 2019-01-04 | 中国科学院西安光学精密机械研究所 | A kind of wheeled end burnishing device of public affairs rotation |
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| CN102756336B (en) | 2014-08-13 |
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