CN104942377A - Ellipse vibration cutting auxiliary device based on three-piezoelectric driving - Google Patents
Ellipse vibration cutting auxiliary device based on three-piezoelectric driving Download PDFInfo
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Abstract
The invention discloses an ellipse vibration cutting auxiliary device based on three-piezoelectric driving; the ellipse vibration cutting auxiliary device comprises a support mechanism, a flexible guide mechanism and a driving mechanism; the flexible guide mechanism and the driving mechanism are fixed on the support mechanism; the driving mechanism drives the flexible guide mechanism in a point-contact mode, so the flexible guide mechanism can make reciprocating motions in an x direction and ellipse locus motions in y and z planes. The ellipse vibration cutting auxiliary device uses a composite double-parallel four-rod mechanism in a horizontal direction, so displacement in the horizontal direction can be greatly improved, and stress on a flexible hinge in horizontal direction motions can be greatly reduced, thus improving mechanism life. The combined flexible hinge with two cascade ends and a composite center is employed in the y and z planes so as to match with two parallel piezoelectric, thus realizing high frequency motions under low coupling operation; the ellipse vibration cutting auxiliary device uses flexible guide unit integration so as to reduce tradition assembling errors.
Description
Technical field
The present invention relates to Ultra-precision machining, particularly relate to a kind of Long Distances elliptical vibration cutting servicing unit of three Piezoelectric Driving.
Background technology
Along with producing the development with science and technology, in recent years, some hard brittle materials, particularly some nonmetallic materials, the fields such as electronics, optics, instrument and meter, space flight and civilian industry are widely used in because it has excellent performance, the Precision and Ultra-precision Machining of hard brittle material is very difficult, such as the grinding etc. of traditional processing method can not meet the requirement of development of modern industry to precision, the focus that the hard brittle material therefore with premium properties is accurate, Ultraprecision Machining has become numerous scholar's common concern as a new problem.
The research of numerous scholar shows, seek a kind of new processing method for improving the precision of hard brittle material, Ultra-precision Turning is very feasible.What nineteen twenty-seven American Physical scholar R.W.Wood and L.A.Loomis delivered beat the world, and a section has opened the prelude of Ultrasonic machining about the paper of excusing from death process principle, Japan is in phase early 1950s, also set up vibrocutting research institute specially to study UVC, the beginning of the sixties at the end of the fifties Soviet Union and the U.S. also start the research work of Ultrasonic machining.The achievement in research of these countries shows that UVC has significant effect in the processing improving some materials.This English of society two professor along with Nagoya University in 1993 waits people to propose Two dimensional cutting (i.e. elliptical vibration cutting Elliptical Vibration Cutting first, hereinafter referred to as EVC), the more effective cutting way of one dimension vibrocutting is compared for difficult-to-machine material have found one, compared to one dimension vibrocutting, EVC has reduction cutting temperature, better improve cutter life, suppress the series of advantages such as burr generation, therefore some ultrasonic EVC devices arise at the historic moment, ultrasonic EVC utilizes two to be parallel to each other or vertical ultrasonic transformer driving cutter, although ultrasonic EVC utilizes the characteristic of resonance can reach very high vibrocutting frequency, but be limited to the design of ultrasonic transformer, lacking the features such as flexibility makes its relative difficult control, utilize piezoelectric stack (PZT) although drive the non-co-vibration shape EVC of flexible hinge to achieve the adjustable of parameter, but for the processing aspect of some free form surfaces, there is certain limitation, based on these deficiencies above-mentioned, scholars devise three-dimensional elliptical vibrocutting (3D EVC), 3D EVC is divided into resonance type and the non-co-vibration shape two kinds equally, the problem that resonance type 3D EVC exists equally due to knife bar design is difficult to obtain high order mode, adopt opened loop control cannot obtain properly elliptic movement locus, vibration frequency and elliptic motion parameter-dependent are in the deficiency such as nonlinear structural dynamics parameter of knife bar, the three-dimensional elliptical motion of different tracks can be obtained by the input signal controlling piezoelectric stack compared to resonance type 3D EVC non-co-vibration shape 3D EVC, on the basis of inheriting EVC advantage, it is controlled that off-resonance 3D EVC achieves parameter, can the advantage such as implementation space arbitrary ellipse motion, the most promising a kind of machining mode is at present thought by scholars.
Existing some scholars designs for non-co-vibration shape 3D EVC device at present, and its design principle mainly comprises four piezoelectric drivens and three piezoelectric drivens.What the off-resonance three-dimensional elliptical vibration cutting device patent for design principle three Piezoelectric Driving of the present invention can be looked into has: a kind of Diamond Cutting Tools elliptic motion generating apparatus that patent (CN102059575A) is mentioned, although point of a knife place defines three-dimensional elliptical movement locus under the driving of three vertical piezoelectricity, but due to its tool rest manual assembly problem, easily make tool rest sideslip when the direct high-frequency drive tool rest of piezoelectricity, stability is not strong.A kind of three-dimensional elliptical vibration cutting device that patent (CN102371359A) is mentioned, owing to have employed shaft flexible hinge, makes shaft flexible hinge two directions of motion in the course of work there is larger motion crosstalk.It is foursquare compliance unit that a kind of three-dimensional elliptical vibratory turning knife rest that patent (CN104001943A) is mentioned have employed cross section, although achieve three-dimensional elliptical movement locus with z to movement to rotation by x/y two, be difficult to the flexibility of assurance device.A kind of off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus that patent (CN103611988A) is mentioned, although have good assembly precision and motion one-way, but the parallel screw body adopted easily produces fatigue failure because stress exists in high-frequency reciprocating motion process, be difficult to the service life of assurance device.
Therefore, although there has been scholar to have devised corresponding off-resonance 3D EVC topping machanism, three-dimensional EVC field is also in has treated the further investigation stage, the shortcomings such as the device developed still also exists poor stability, and service life is short, and stroke is little, and vibration frequency is low.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of Long Distances elliptical vibration cutting servicing unit based on three Piezoelectric Driving, to solve in prior art short, the problem such as processing stroke is little, vibration frequency is low in elliptical vibration cutting servicing unit service life.
For solving the problems of the technologies described above, the present invention adopts following technical proposals:
Based on the elliptical vibration cutting servicing unit of three Piezoelectric Driving, this device comprises supporting mechanism 1, submissive guiding mechanism 2 and driving mechanism 3, described submissive guiding mechanism 2 and driving mechanism 3 are fixed on supporting mechanism 1, and described driving mechanism 3 drives submissive guiding mechanism 2 in point cantact mode;
Described submissive guiding mechanism 2 comprises the first hinge support block 24, second hinge support block 25, rectangle frame 21 and is symmetricly set on the first hinge set 26, second hinge set 27, the 3rd hinge set 28 and the 4th hinge set 29 on rectangle frame 21; One end of first hinge set 26 and one end of the second hinge set 27 are fixed on rectangle frame 21, and the other end of the first hinge set 26 and the other end of the second hinge set 27 are fixed on the first hinge support block 24; One end of 3rd hinge set 28 and one end of the 4th hinge set 29 are fixed on rectangle frame 21, the other end of the 3rd hinge set 28 and the other end of the 4th hinge set 29 are fixed on the second hinge support block 25, and described first hinge support block 24 and the second hinge support block 25 are fixed on supporting mechanism 1; First hinge support block 24, second hinge support block 25, rectangle frame 21 and the first hinge set 26, second hinge set 27, the 3rd hinge set 28 and the 4th hinge set 29 be symmetricly set on rectangle frame 21 form Composite Double parallelogram lindage; Described rectangular support frame 21 is provided with the combination flexible hinge 22 with cutter draw-in groove 23 further, described cutter draw-in groove 23 is positioned at the geometric center of rectangular support frame 21, described combination flexible hinge 22 comprises series connection flexible hinge 221 and composite and flexible hinge 222, the tie point of one end of described series connection flexible hinge 221 and composite and flexible hinge 222 is positioned at described stage property draw-in groove 23 place, and the other end of composite and flexible hinge 222 is fixed on rectangle frame 21;
Described driving mechanism 3 comprises and is fixed on the first piezoelectric stack 31, second piezoelectric stack 32 on supporting mechanism 1 and the 3rd piezoelectric stack 33;
Described first piezoelectric stack 31 drives submissive guiding mechanism 2 to move reciprocatingly in x direction, described second piezoelectric stack 32 and the 3rd piezoelectric stack 33 with the mode of staggered driving drive submissive guiding mechanism 2-in-1 become elliptical orbit on yz face.
Preferably, described first hinge set 26 comprises the first hinge 261 and the second hinge 262; One end of described first hinge 261 is fixedly connected with one end of the second hinge 262, the other end of described first hinge 261 and the other end of the second hinge 262 are separately fixed on the first hinge support block 24 and rectangle frame 21, described first hinge 261 and the parallel placement of the second hinge 262;
Described second hinge set 27 comprises the 3rd hinge 271 and the 4th hinge 272, one end of described 3rd hinge 271 is fixedly connected with one end of the 4th hinge 272, and the other end of described 3rd hinge 271 and the other end of the 4th hinge 272 are separately fixed at the first hinge support block 24 and rectangle frame 21; Described 3rd hinge (27) and the 4th hinge (272 parallel placements;
Described 3rd hinge set 28 comprises the 5th hinge 281 and the 6th hinge 282, one end of described 5th hinge (281) is fixedly connected with one end of the 6th hinge 282, and the other end of described 5th hinge 281 and the other end of the 6th hinge 282 are separately fixed at the second hinge support block 25 and rectangle frame 21; Described 5th hinge 281 and the parallel placement of the 6th hinge 282;
Described 4th hinge set 29 comprises the 7th hinge 291 and the 8th hinge 292, one end of described 7th hinge 291 is fixedly connected with one end of the 8th hinge 292, and the other end of described 7th hinge 291 and the other end of the 8th hinge 292 are separately fixed at the second hinge support block 25 and rectangle frame 21; Described 7th hinge 291 and the parallel placement of the 8th hinge 292.
Preferably, described submissive guiding mechanism is the integrative-structure of linear cutter.
Preferably, described supporting mechanism 1 comprises base 11, lamina tecti 12 and is arranged on left side vertical plate 13 and the right side riser 14 for fixing submissive guiding mechanism 2 between base 11 and lamina tecti 12; Described left side vertical plate 13 and right side riser 14 are provided with the positioning boss for the first hinge support block 24 and the second hinge support block 25 described in positioning supports near the side of submissive guiding mechanism 2; Described right side riser 14 is provided with the first piezoelectric stack positioning screw hole 141 for placing the first piezoelectric stack 31.
Preferably, described base 11 forms U-shaped supporting construction with left side vertical plate 13 and right side riser 14, and described base 11 is provided with at least three the base locating holes 111 fixing with external equipment.
Preferably, described supporting mechanism 1 comprises the front shroud 15 be fixed on left side vertical plate 13 and right side riser (14) further, and described front shroud 15 is provided with eats dishes without rice or wine 153 for what hold described cutter draw-in groove.
Preferably, described supporting mechanism 1 comprises the back shroud 16 be fixed on described left side vertical plate 13 and right side riser 14 further, and described back shroud is provided with the second piezoelectric stack positioning screw hole 161 for placing the second piezoelectric stack 32 and the 3rd piezoelectric stack positioning screw hole 163 for placing the 3rd piezoelectric stack 33.
Preferably, this device comprises the detecting unit 4 for detecting three groups of piezoelectric stack displacements further.
Preferably, this detecting unit 4 comprises the first capacitance displacement sensor 41, second capacitance displacement sensor 42 and the 3rd capacitance displacement sensor 43.
Preferably, described supporting mechanism 1 comprises further
Be arranged on the first fixing chuck 133 for placing the first capacitance displacement sensor 41 in left side vertical plate 13;
Be arranged on back shroud 16 and fix chuck 168 for the second fixing chuck 167 and the 3rd placing the second capacitance displacement sensor 42 and the 3rd capacitance displacement sensor 43.
Beneficial effect of the present invention is as follows:
Technical scheme of the present invention compared with prior art advantage is:
(1) horizontal direction adopts Composite Double parallelogram lindage pattern, and the displacement of the horizontal direction that this tactic pattern not only makes increases greatly, and the stress on the flexible hinge of the horizontal motion made reduces greatly, improves the service life of mechanism;
(2) what adopt in yz face is the parallel two-dimentional EVC frame modes of two piezoelectricity, but owing to employing the flexible hinge of series connection at two ends, the middle composite and flexible hinge that adopts draws, and not only achieves the high-frequency motion under low coupling operation, and structure is simple, be easy to realize;
(3) submissive pilot unit is as a whole, shaping by Linear cut time processing, reduce the error of tradition assembling, and this submissive pilot unit is frame structure, substantially reduces the quality of structure, saves material;
(4) this apparatus structure is simple, and remove submissive pilot unit, piezoelectric stack and capacitance sensor, other are simple template entity, are easy to processing and manufacturing;
(5) this device can detect the change of displacement in real time by capacitance sensor and feed back, and is conducive to the ACTIVE CONTROL of user.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail;
Fig. 1 illustrates the inside overall structure schematic diagram of device of the present invention;
Fig. 2 illustrates the front perspective structural representation of device of the present invention;
Fig. 3 illustrates the rear portion perspective view of device of the present invention;
Fig. 4 illustrates the schematic diagram of the lamina tecti of device of the present invention;
Fig. 5 illustrates the schematic diagram of the back shroud of device of the present invention;
Fig. 6 illustrates the schematic diagram of the front shroud of device of the present invention;
Fig. 7 illustrates the schematic diagram of the submissive pilot unit of device of the present invention;
Fig. 8 illustrates the internal structure schematic diagram of the submissive pilot unit of the removal of device of the present invention;
Fig. 9 illustrates the motion schematic diagram of the x of device of the present invention to Composite Double parallelogram lindage;
Figure 10 illustrates the schematic diagram of the yz face two-dimensional elliptic vibration of device of the present invention;
Figure 11 illustrates the schematic diagram of the three-dimensional elliptical vibration synthesize motion of device of the present invention.
Drawing reference numeral
1, supporting mechanism, 11, base, 12, lamina tecti, 13, left side vertical plate, 14, right side riser, 15, front shroud, 16, back shroud, 111, base locating hole, 121, lamina tecti retaining thread hole, 122, lamina tecti hold-down screw, 131, positioning screw hole, 132, dog screw, 133, through hole, 134, first fixing chuck, 135, positioning boss, 141, first piezoelectric stack positioning screw hole, 142, first piezoelectric stack dog screw, 143, positioning screw hole, 144, dog screw, 145, positioning boss, 151, front shroud fixing threaded hole, 152, front shroud hold-down screw, 153, cutter draw-in groove is eated dishes without rice or wine, 161, second piezoelectric stack positioning screw hole, 162, second piezoelectric stack dog screw, 163, 3rd piezoelectric stack positioning screw hole, 164, 3rd piezoelectric stack dog screw, 165, back shroud fixing threaded hole, 166, back shroud hold-down screw, 167, second fixing chuck, 168, 3rd positioning chuck,
2, submissive guiding mechanism, 21, rectangle frame, 22, flexible hinge, 23, cutter draw-in groove, the 24, first hinge support block, the 25, second hinge support block, 26, the first hinge set, the 27, second hinge set, the 28, the 3rd hinge set, 29, the 4th hinge set, 211, outer rectangular frame frame, 221, series connection flexible hinge, 222, composite and flexible hinge, the 261, first hinge, the 262, second hinge, 271, the 3rd hinge, 272, the 4th hinge, the 281, the 5th hinge, the 282, the 6th hinge, 291, the 7th hinge, the 292, the 8th hinge;
3, driving mechanism, the 31, first piezoelectric stack, the 32, second piezoelectric stack, the 33, the 3rd piezoelectric stack;
4, detecting unit, the 41, first capacitance displacement sensor, the 42, second capacitance displacement sensor, the 43, the 3rd capacitance displacement sensor.
Detailed description of the invention
In order to be illustrated more clearly in the present invention, below in conjunction with preferred embodiments and drawings, the present invention is described further.Parts similar in accompanying drawing represent with identical Reference numeral.It will be appreciated by those skilled in the art that specifically described content is illustrative and nonrestrictive, should not limit the scope of the invention with this below.
As shown in Figure 1 to Figure 3, the invention discloses the Long Distances elliptical vibration cutting servicing unit based on three Piezoelectric Driving, this device comprises supporting mechanism 1, submissive guiding mechanism 2 and driving mechanism 3, described submissive guiding mechanism 2 and driving mechanism 3 are fixed on supporting mechanism 1, and described driving mechanism 3 drives submissive guiding mechanism 2 in point cantact mode.
As shown in Figures 3 to 6, described supporting mechanism 1 comprises base 11, lamina tecti 12 and is arranged on left side vertical plate 13 and the right side riser 14 for fixing submissive pilot unit 2 between base 11 and top cover 12, described base and left side vertical plate and right side riser form a U-shaped supporting construction, described base is provided with at least three locating holes fixing with external equipment, and the present invention preferably 3 locating holes comes to locate with external equipment; The present invention is more firm in order to what make " work " type hinge support block 24 in submissive guiding mechanism 2 fix, it is more accurate to locate, to be equipped with the positioning boss 134 and positioning boss 145 that are respectively used to the first hinge support block 24 and the second hinge support block 25 described in positioning supports at described left side vertical plate 13 and right side riser 14 near the side of submissive guiding mechanism 2, respectively the first hinge support block and the second hinge support block to be stuck in stroke stable support and location between boss and riser by this positioning boss 134 and positioning boss 145.Described right side riser 14 is also provided with the first piezoelectric stack positioning screw hole 141 of the T-shaped for placing the first piezoelectric stack 31.Described supporting mechanism 1 comprises the front shroud 15 be fixed on left side column 13 and right side uprights 14 further, this front shroud 15 is provided with 4 front shroud fixing threaded holes 151, be fixed on left side column 13 and right side uprights 14 by front shroud hold-down screw 152, described front shroud 15 is also provided with eats dishes without rice or wine 153 for holding the square of described cutter draw-in groove.Described supporting mechanism 1 comprises the back shroud 16 be fixed on described left side column 13 and right side uprights 14 further, and described back shroud 16 is provided with the second piezoelectric stack positioning screw hole 161 of the T-shaped for placing the second piezoelectric stack 32 and the 3rd hole piezoelectric stack positioning screw hole 163 for the T-shaped of placing the 3rd piezoelectric stack 33.
As shown in Figure 7, described submissive guiding mechanism 2 comprises the first hinge support block 24, second hinge support block 25, rectangle frame 21 and is symmetricly set on the first hinge set 26, second hinge set 27, the 3rd hinge set 28 and the 4th hinge set 29 on rectangle frame 21; One end of first hinge set 26 and one end of the second hinge set 27 are fixed in the outer rim 211 of rectangle frame 21, and the other end of the first hinge set 26 and the other end of the second hinge set 27 are fixed on the first hinge support block 24; One end of 3rd hinge set 28 and one end of the 4th hinge set 29 are fixed in the outer rim 211 of rectangle frame 21, the other end of the 3rd hinge set 28 and the other end of the 4th hinge set 29 are fixed on the second hinge support block 25, and described first hinge support block 24 and the second hinge support block 25 are fixed on supporting mechanism 1; First hinge support block 24, second hinge support block 25, rectangle frame 21 and the first hinge set 26, second hinge set 27, the 3rd hinge set 28 and the 4th hinge set 29 be symmetricly set on rectangle frame 21 form Composite Double parallelogram lindage; Described rectangular support frame 21 is provided with the combination flexible hinge 22 with cutter draw-in groove 23 further, described cutter draw-in groove 23 is positioned at the geometric center of rectangular support frame 21, described combination flexible hinge 22 comprises with cutter draw-in groove for the straight circle series connection flexible hinge 221 in the axisymmetric vertical direction of symmetry and y-axis composite and flexible hinge 222 upwards, the tie point of one end of described series connection flexible hinge 221 and composite and flexible hinge 222 is positioned at described stage property draw-in groove place, and the other end of composite and flexible hinge 222 is fixed in the outer rim 211 of rectangle frame 21.In the present embodiment, hinge support blocks design is " work " type.Described first hinge set 26 comprises the first hinge 261 and the second hinge 262; One end of described first hinge 261 is fixedly connected with one end of the second hinge 262, the other end of described first hinge 261 and the other end of the second hinge 262 are separately fixed in one end of " work " type first hinge support block 24 and the outer rim 211 of rectangle frame 21, described first hinge 261 and the parallel placement of the second hinge 262; Described second hinge set 27 comprises the 3rd hinge 271 and the 4th hinge 272, one end of described 3rd hinge 271 is fixedly connected with one end of the 4th hinge 272, and the other end of described 3rd hinge 271 and the other end of the 4th hinge 272 are separately fixed in the other end of " work " type first hinge support block 24 and the outer rim 211 of rectangle frame 21; Described 3rd hinge 271 and the parallel placement of the 4th hinge 272; By dog screw 132 by described " work " type first hinge support block 24 and the first hinge 261 and the fixing end of the 3rd hinge 271, be fixed on the positioning screw hole 131 that is arranged in left side vertical plate 13.Described 3rd hinge set 28 comprises the 5th hinge 281 and the 6th hinge 282, one end of described 5th hinge 281 is fixedly connected with one end of the 6th hinge 282, and the other end of described 5th hinge 281 and the other end of the 6th hinge 282 are separately fixed in one end of " work " type second hinge support block 25 and the outer rim 211 of rectangle frame 21; Described 5th hinge 281 and the parallel placement of the 6th hinge 282; Described 4th hinge set 29 comprises the 7th hinge 291 and the 8th hinge 292, one end of described 7th hinge 291 is fixedly connected with one end of the 8th hinge 292, and the other end of described 7th hinge 291 and the other end of the 8th hinge 292 are separately fixed in the other end of " work " type second hinge support block 25 and the outer rim 211 of rectangle frame 21; Described 7th hinge 291 and the parallel placement of the 8th hinge 292; By dog screw 144 by described " work " type second hinge support block 24 and the 5th hinge 281 and the fixing end of the 7th hinge 291, be fixed on the positioning screw hole 143 that is arranged on the riser 14 of right side.The present invention, in order to the machining accuracy of assurance device, reduces assembly difficulty and rigging error, adopts the mode of Linear cut to process submissive pilot unit 2, makes submissive guiding mechanism 2 form integrative-structure.
As shown in Figure 8, described driving mechanism 3 comprises and is fixed on the first piezoelectric stack 31, second piezoelectric stack 32 on supporting mechanism 1 and the 3rd piezoelectric stack 33; Described first piezo stack 31 heap drives submissive guiding mechanism 2 to move reciprocatingly in x direction, described second piezoelectric stack 32 and the 3rd piezoelectric stack 33 with the mode of staggered driving drive submissive guiding mechanism 2-in-1 become elliptical orbit on yz face.
Device as of the present invention in Fig. 8 is ultraprecise auxiliary machining device, need real-time detecting & monitoring is carried out for the displacement detecting in process and feedback, therefore, this device is provided with the detecting unit 4 for detecting three groups of piezoelectric stack displacements further, and this detecting unit 4 comprises first capacitance displacement sensor 41, second capacitance displacement sensor 42 and the 3rd capacitance displacement sensor 43; The x of test side to rectangle frame 21 of the first capacitance displacement sensor 41 detects in real time to displacement, second capacitance displacement sensor 42 and the 3rd capacitance displacement sensor 43 carry out the real-time detection of displacement respectively to flexible hinge 22 upper part hinge and lower part hinge, the displacement signal recorded the most in real time is presented on computer to driving the input signal of piezoelectricity to control again.For convenience of the capacitance displacement sensor held for detecting, described supporting mechanism 1 comprises the first fixing chuck 134 for placing the first capacitance displacement sensor 41 be arranged in left side vertical plate 13 further, be arranged on back shroud 16 and fix chuck 168, to provide the stable support of sensor for the second fixing chuck 167 and the 3rd placing the second capacitance displacement sensor 42 and the 3rd capacitance displacement sensor 43.
Technical scheme of the present invention utilizes the first piezoelectric stack 31 in driving mechanism 3 described in this device to the rectangle frame 21 in submissive guiding mechanism 2 with the driving force of dither, rectangle frame 21 is moved reciprocatingly in x direction, utilize the second piezoelectric stack 32 and the 3rd piezoelectric stack 33 to the combination flexible hinge 22 with cutter draw-in groove 23 be arranged on rectangle frame 21 with the driving force of staggered dither, make rectangle frame 21 synthesize elliptical orbit on yz face, thus realize the elliptical vibration cutting track of elliptical vibration cutting servicing unit of the present invention.
Below by one group of embodiment, the present invention will be further described:
As shown in Figure 1, this auxiliary cutting device comprises supporting mechanism 1, submissive guiding mechanism 2, driver element 3 and detecting unit 4; Submissive guiding mechanism 2, driving mechanism 3 and detecting unit 4 are positioned at supporting mechanism.
As shown in Figures 1 to 6, in this device, supporting mechanism comprises base 11, lamina tecti 12, left side vertical plate 13, right side riser 14, front shroud 15 and back shroud 16.Wherein, as shown in Figure 1, left side vertical plate 13 and right side riser 14 form a U-shaped supporting construction with base 11, and in the present embodiment, left side vertical plate 13 and right side riser 14 are structure as a whole; As shown in Figure 3, base 11 is evenly equipped with 3 base locating holes 111; As shown in Figure 4, lamina tecti 12 is provided with 4 each lamina tecti retaining thread holes 121, and is fixed by lamina tecti hold-down screw 122 and left side vertical plate 13 and right side riser 14; As shown in Figure 2, front shroud 15 is provided with 4 front shroud fixing threaded holes 151, is fixed on left side vertical plate 13 and right side riser 14 by front shroud hold-down screw 152, front shroud 15 also comprises a square cutter draw-in groove and eat dishes without rice or wine 153.As described in Figure 3, back shroud 16 is provided with the second piezoelectric stack positioning screw hole 161 and the 3rd piezoelectric stack positioning screw hole 163, and the second piezoelectric stack 32 and the 3rd piezoelectric stack 33 is fixed respectively by the second piezoelectric stack dog screw 162 and the 3rd piezoelectric stack dog screw 164; Back shroud 16 is also provided with back shroud fixing threaded hole 165, is fixed on left side vertical plate 13 and right side riser 14 by back shroud hold-down screw 166; The 3rd positioning chuck 168 back shroud 16 being also provided with the second fixing chuck 167 for fixing the second capacitance displacement sensor 42 and fixing the 3rd capacitance displacement sensor 43.As shown in Figure 2, left side vertical plate 13 is provided with two positioning screw holes 131 for fixing the first hinge support block 24, by dog screw 132, first hinge support block 24 being fixed in left side vertical plate 13, left side vertical plate 13 being also provided with through hole 133 for placing the data line be electrically connected with the first capacitance displacement sensor 41.As shown in Figure 3, right side riser 14 is provided with the first piezoelectric stack positioning screw hole 141, is fixed by the first piezoelectric stack 31 by the first piezoelectric stack dog screw 142; On the right side of this, riser 14 is also provided with two positioning screw holes 143 for fixing the second hinge support block 25, is fixed on the riser 14 of right side by the second hinge support block 25 by dog screw 144.In this example, to be equipped with the positioning boss 134 and positioning boss 145 that are respectively used to the first hinge support block 24 and the second hinge support block 25 described in positioning supports at described left side vertical plate 13 and right side riser 14 near the side of submissive guiding mechanism 2, respectively the first hinge support block and the second hinge support block to be stuck in stroke stable support and location between boss and riser by this positioning boss 134 and positioning boss 145.
As shown in Figure 7, submissive guiding mechanism 2 described in this device comprises the first hinge support block 24, second hinge support block 25, rectangle frame 21 and is symmetricly set on the first hinge set 26, second hinge set 27, the 3rd hinge set 28 and the 4th hinge set 29 on rectangle frame 21; One end of first hinge set 26 and one end of the second hinge set 27 are fixed in the outer rim 211 of rectangle frame 21, and the other end of the first hinge set 26 and the other end of the second hinge set 27 are fixed on the first hinge support block 24; One end of 3rd hinge set 28 and one end of the 4th hinge set 29 are fixed in the outer rim 211 of rectangle frame 21, the other end of the 3rd hinge set 28 and the other end of the 4th hinge set 29 are fixed on the second hinge support block 25, and described first hinge support block 24 and the second hinge support block 25 are fixed on supporting mechanism 1; First hinge support block 24, second hinge support block 25, rectangle frame 21 and the first hinge set 26, second hinge set 27, the 3rd hinge set 28 and the 4th hinge set 29 be symmetricly set on rectangle frame 21 form Composite Double parallelogram lindage; Described rectangular support frame 21 is provided with the combination flexible hinge 22 with cutter draw-in groove 23 further, described cutter draw-in groove 23 is positioned at the geometric center of rectangular support frame 21, described combination flexible hinge 22 comprises with cutter draw-in groove for the straight circle series connection flexible hinge 221 in the axisymmetric vertical direction of symmetry and y-axis composite and flexible hinge 222 upwards, the tie point of one end of described series connection flexible hinge 221 and composite and flexible hinge 222 is positioned at described stage property draw-in groove place, and the other end of composite and flexible hinge 222 is fixed in the outer rim 211 of rectangle frame 21.Described first hinge set 26 comprises the first hinge 261 and the second hinge 262; One end of described first hinge 261 is fixedly connected with one end of the second hinge 262, the other end of described first hinge 261 and the other end of the second hinge 262 are separately fixed on the first hinge support block 24 and rectangle frame 21, described first hinge 261 and the parallel placement of the second hinge 262; Described second hinge set 27 comprises the 3rd hinge 271 and the 4th hinge 272, one end of described 3rd hinge 271 is fixedly connected with one end of the 4th hinge 272, and the other end of described 3rd hinge 271 and the other end of the 4th hinge 272 are separately fixed at the first hinge support block 24 and rectangle frame 21; Described 3rd hinge 271 and the parallel placement of the 4th hinge 272; Described 3rd hinge set 28 comprises the 5th hinge 281 and the 6th hinge 282, one end of described 5th hinge 281 is fixedly connected with one end of the 6th hinge 282, and the other end of described 5th hinge 281 and the other end of the 6th hinge 282 are separately fixed at the second hinge support block 25 and rectangle frame 21; Described 5th hinge 281 and the parallel placement of the 6th hinge 282; Described 4th hinge set 29 comprises the 7th hinge 291 and the 8th hinge 292, one end of described 7th hinge 291 is fixedly connected with one end of the 8th hinge 292, and the other end of described 7th hinge 291 and the other end of the 8th hinge 292 are separately fixed at the second hinge support block 25 and rectangle frame 21; Described 7th hinge 291 and the parallel placement of the 8th hinge 292.The present invention, in order to the machining accuracy of assurance device, reduces assembly difficulty and rigging error, adopts the mode of Linear cut to process submissive pilot unit 2, makes submissive guiding mechanism 2 form integrative-structure.Described in this example, submissive guide frame 2 forms a Composite Double parallelogram lindage by 4 hinge set, two " work " type hinge support blocks and rectangle frames 21.That the inside of rectangle frame 21 is provided with a up-down structure symmetry and centre is with the flexible hinge of cutter draw-in groove, this cutter draw-in groove is positioned at the geometric center of rectangle frame 21, this part adopts the principle of lever, utilization is arranged on first piezoelectric stack 31 parallel with x-axis on the riser 14 of right side and drives rectangle frame 21 to realize the reciprocating motion in x direction, utilize and be arranged on the flexible hinge with cutter draw-in groove that the second piezoelectric stack 32 parallel with y-axis on back shroud 16 and the 3rd piezoelectric stack 33 drive rectangle frame to arrange synthesize elliptical vibration on yz face, utilize the first capacitance displacement sensor 41 respectively, the displacement of the second capacitance displacement sensor 42 and the 3rd capacitance displacement sensor 43 pairs of rectangle frames 21 detects.
As shown in Figure 8, in this device, driver element 3 is made up of identical columniform first piezoelectric stack 31, second piezoelectric stack 32 of three models and the 3rd piezoelectric stack 33; First piezoelectric stack 31 gives rectangle frame 21 in submissive guiding mechanism 2 with the driving force of dither, rectangle frame 21 is moved reciprocatingly in x direction, utilize the second piezoelectric stack 32 and the 3rd piezoelectric stack 33 to the combination flexible hinge 22 with cutter draw-in groove 23 be arranged on rectangle frame 21 with the driving force of staggered dither, make rectangle frame 21 synthesize elliptical orbit on yz face, thus realize the elliptical vibration cutting track of elliptical vibration cutting servicing unit of the present invention.
As shown in Figure 8, in this device, detecting unit 4 comprises the first capacitance displacement sensor 41, second capacitance displacement sensor 42 and the 3rd capacitance displacement sensor 43, first capacitance displacement sensor 41 is positioned on the fixing chuck 134 of first in left side vertical plate 13, second capacitance displacement sensor 42 is fixed on and is positioned on the fixing chuck 167 of second on back shroud 16, 3rd capacitance displacement sensor 43 is positioned on the fixing chuck 168 of the 3rd on back shroud 16, the x of test side to rectangle frame 21 of the first capacitance displacement sensor 41 detects in real time to displacement, second capacitance displacement sensor 42 and the 3rd capacitance displacement sensor 43 carry out the real-time detection of displacement respectively to flexible hinge 22 upper part hinge and lower part hinge, the displacement signal recorded the most in real time is presented on computer to driving the input signal of piezoelectricity to control again.
Device assembling is complete, utilizes dog screw, is fixed on the rail plate of super precision lathe by this servicing unit by the positioning screw hole 111 on base 11.Apply following signal to respectively three piezoelectric stacks:
In formula, a
1, a
2and a
3for inputting the vibration amplitude of sinusoidal signal, f is the vibration frequency of input sinusoidal signal, φ
1, φ
2, φ
3for inputting the initial phase of sinusoidal signal.X drives the first piezoelectric stack 31 telescopic variation to sinusoidal signal, and then the rectangle frame 21 promoting submissive guiding mechanism 2 moves reciprocatingly in the x direction, its reciprocating principle as shown in Figure 9, Composite Double parallelogram lindage is utilized to overcome the sports coupling of vertical direction, and the half rigidity of compound parallelogram lindage, adopts this structure to make the displacement of horizontal direction greatly increase.Y to two sinusoidal signals drive the second piezoelectric stack 32 and the 3rd piezoelectric stack 33 to promote symmetrical straight circle series connection flexible hinge 221 respectively, and under the traction of composite and flexible hinge 222, yz plane is done elliptical orbit motion, the principle of this motion as shown in Figure 10, the power of Fy1 is applied by the second piezoelectric stack 32 the first half to series connection flexible hinge 221, the power of Fy2 is applied by the 3rd piezoelectric stack 33 the latter half to series connection flexible hinge 221, by the dephased sinusoidal signal of the above-mentioned tool provided, make cutter draw-in groove 23 along the position described by dotted line in such as Figure 10, move along elliptical orbit, can by regulating a
2and a
3size and phase
2, φ
3size, and then regulate the shape of elliptical orbit of formation in yz face.By above-mentioned x to sinusoidal drive signals drive x to reciprocating motion, and y to the yz face that drives of two sinusoidal drive signals in elliptic motion, can blended space three-dimensional elliptical move, its principle as shown in figure 11, the power of Fx is applied by the first piezoelectric stack 31 pairs of rectangle frames 21, the power of Fy1 is applied by the second piezoelectric stack 32 the first half to series connection flexible hinge 221, applied the power of Fy2 by the 3rd piezoelectric stack 33 the latter half to series connection flexible hinge 221, final realization such as the three-dimensional elliptical as described on the right side of Figure 11 is moved.Equally, adjustment three vibration amplitude a can be passed through
1, a
2and a
3size and three phase
1, φ
2, φ
3size regulate the shape of the elliptical trajectory formed in three dimensions.According to the particular location that three piezoelectric stacks are arranged, the capacitance displacement sensor arranged near each piezoelectric stack corresponding thereto detects in real time to piezoelectric stack, the x of test side to rectangle frame 21 of the first capacitance displacement sensor 41 detects in real time to displacement, second capacitance displacement sensor 42 and the 3rd capacitance displacement sensor 43 carry out the real-time detection of displacement respectively to flexible hinge 22 upper part hinge and lower part hinge, the displacement signal recorded the most in real time is presented on computer to driving the input signal of piezoelectricity to control again.
In sum, technical scheme of the present invention adopts Composite Double parallelogram lindage pattern in the horizontal direction, the displacement of the horizontal direction that this pattern not only makes increases greatly, and the stress on the flexible hinge of horizontal motion is reduced greatly, improves the service life of mechanism; The two-dimentional EVC frame mode that what technical scheme of the present invention adopted in yz face is two piezoelectricity are parallel, but owing to employing the flexible hinge of series connection at two ends, the middle composite and flexible hinge that adopts draws, not only achieve the high-frequency motion under low coupling operation, and structure is simple, be easy to realize; In technical scheme of the present invention, submissive pilot unit adopts the template integral mechanism of linear cutter, reduces the error of tradition assembling.
Obviously; the above embodiment of the present invention is only for example of the present invention is clearly described; and be not the restriction to embodiments of the present invention; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here cannot give exhaustive to all embodiments, every belong to technical scheme of the present invention the apparent change of extending out or variation be still in the row of protection scope of the present invention.
Claims (10)
1. based on the elliptical vibration cutting servicing unit of three Piezoelectric Driving, it is characterized in that, this device comprises supporting mechanism (1), submissive guiding mechanism (2) and driving mechanism (3), described submissive guiding mechanism (2) and driving mechanism (3) are fixed on supporting mechanism (1), and described driving mechanism (3) drives submissive guiding mechanism (2) in point cantact mode;
Described submissive guiding mechanism (2) comprises the first hinge support block (24), the second hinge support block (25), rectangle frame (21) and is symmetricly set on the first hinge set (26), the second hinge set (27), the 3rd hinge set (28) and the 4th hinge set (29) on rectangle frame (21); One end of first hinge set (26) and one end of the second hinge set (27) are fixed on rectangle frame (21), and the other end of the first hinge set (26) and the other end of the second hinge set (27) are fixed on the first hinge support block (24); One end of 3rd hinge set (28) and one end of the 4th hinge set (29) are fixed on rectangle frame (21), the other end of the 3rd hinge set (28) and the other end of the 4th hinge set (29) are fixed on the second hinge support block (25), and described first hinge support block (24) and the second hinge support block (25) are fixed on supporting mechanism (1); First hinge support block (24), the second hinge support block (25), rectangle frame (21) and the first hinge set (26), the second hinge set (27), the 3rd hinge set (28) and the 4th hinge set (29) be symmetricly set on rectangle frame (21) form Composite Double parallelogram lindage; Described rectangular support frame (21) is provided with the combination flexible hinge (22) with cutter draw-in groove (23) further, described cutter draw-in groove (23) is positioned at the geometric center of rectangular support frame (21), described combination flexible hinge (22) comprises series connection flexible hinge (221) and composite and flexible hinge (222), the tie point of one end of described series connection flexible hinge (221) and composite and flexible hinge (222) is positioned at described stage property draw-in groove (23) place, and the other end of composite and flexible hinge (222) is fixed on rectangle frame (21);
Described driving mechanism (3) comprises the first piezoelectric stack (31) be fixed on supporting mechanism (1), the second piezoelectric stack (32) and the 3rd piezoelectric stack (33);
Described first piezoelectric stack (31) drives submissive guiding mechanism (2) to move reciprocatingly in x direction, and described second piezoelectric stack (32) and the 3rd piezoelectric stack (33) drive the elliptical orbit on submissive guiding mechanism (2) synthesis yz face in the mode of staggered driving.
2. elliptical vibration cutting servicing unit according to claim 1, is characterized in that,
Described first hinge set (26) comprises the first hinge (261) and the second hinge (262); One end of described first hinge (261) is fixedly connected with one end of the second hinge (262), the other end of described first hinge (261) and the other end of the second hinge (262) are separately fixed on the first hinge support block (24) and rectangle frame (21), described first hinge (261) and the second hinge (262) parallel placement;
Described second hinge set (27) comprises the 3rd hinge (271) and the 4th hinge (272), one end of described 3rd hinge (271) is fixedly connected with one end of the 4th hinge (272), and the other end of described 3rd hinge (271) and the other end of the 4th hinge (272) are separately fixed at the first hinge support block (24) and rectangle frame (21); Described 3rd hinge (271) and the 4th hinge (272) parallel placement;
Described 3rd hinge set (28) comprises the 5th hinge (281) and the 6th hinge (282), one end of described 5th hinge (281) is fixedly connected with one end of the 6th hinge (282), and the other end of described 5th hinge (281) and the other end of the 6th hinge (282) are separately fixed at the second hinge support block (25) and rectangle frame (21); Described 5th hinge (281) and the 6th hinge (282) parallel placement;
Described 4th hinge set (29) comprises the 7th hinge (291) and the 8th hinge (292), one end of described 7th hinge (291) is fixedly connected with one end of the 8th hinge (292), and the other end of described 7th hinge (291) and the other end of the 8th hinge (292) are separately fixed at the second hinge support block (25) and rectangle frame (21); Described 7th hinge (291) and the 8th hinge (292) parallel placement.
3. elliptical vibration cutting servicing unit according to claim 2, is characterized in that, described submissive guiding mechanism is the integrative-structure of linear cutter.
4. elliptical vibration cutting servicing unit according to claim 2, it is characterized in that, described supporting mechanism (1) comprises base (11), lamina tecti (12) and is arranged on left side vertical plate (13) and the right side riser (14) for fixing submissive guiding mechanism (2) between base (11) and lamina tecti (12); Described left side vertical plate (13) and right side riser (14) are provided with the positioning boss for the first hinge support block (24) and the second hinge support block (25) described in positioning supports near the side of submissive guiding mechanism (2); Described right side riser (14) is provided with the first piezoelectric stack positioning screw hole (141) for placing the first piezoelectric stack (31).
5. elliptical vibration cutting servicing unit according to claim 4, it is characterized in that, described base (11) forms U-shaped supporting construction with left side vertical plate (13) and right side riser (14), and described base (11) is provided with at least three the base locating holes (111) fixing with external equipment.
6. elliptical vibration cutting servicing unit according to claim 4, it is characterized in that, described supporting mechanism (1) comprises the front shroud (15) be fixed on left side vertical plate (13) and right side riser (14) further, and described front shroud (15) is provided with eat dishes without rice or wine (153) for holding described cutter draw-in groove.
7. elliptical vibration cutting servicing unit according to claim 4, it is characterized in that, described supporting mechanism (1) comprises the back shroud (16) be fixed on described left side vertical plate (13) and right side riser (14) further, and described back shroud is provided with the second piezoelectric stack positioning screw hole (161) for placing the second piezoelectric stack (32) and the 3rd piezoelectric stack positioning screw hole (163) for placing the 3rd piezoelectric stack (33).
8. elliptical vibration cutting servicing unit according to claim 6, is characterized in that, this device comprises the detecting unit (4) for detecting three groups of piezoelectric stack displacements further.
9. elliptical vibration cutting servicing unit according to claim 8, it is characterized in that, this detecting unit (4) comprises the first capacitance displacement sensor (41), the second capacitance displacement sensor (42) and the 3rd capacitance displacement sensor (43).
10. elliptical vibration cutting servicing unit according to claim 9, is characterized in that, described supporting mechanism (1) comprises further
Be arranged on the first fixing chuck (133) for placing the first capacitance displacement sensor (41) in left side vertical plate (13);
Be arranged on back shroud (16) and fix chuck (168) for the second fixing chuck (167) and the 3rd placing the second capacitance displacement sensor (42) and the 3rd capacitance displacement sensor (43).
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