CN103252686A - Magnetorheological polishing device for titanium alloy artificial knee joint - Google Patents
Magnetorheological polishing device for titanium alloy artificial knee jointDownload PDFInfo
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- CN103252686A CN103252686ACN2013102233232ACN201310223323ACN103252686ACN 103252686 ACN103252686 ACN 103252686ACN 2013102233232 ACN2013102233232 ACN 2013102233232ACN 201310223323 ACN201310223323 ACN 201310223323ACN 103252686 ACN103252686 ACN 103252686A
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Abstract
Translated fromChinese
Description
Technical field
The present invention relates to a kind of machining magnetorheological finishing device, concrete is the magnetorheological polishing processing device of a kind of titanium alloy artificial knee joint.
Background technology
The titanium alloy artificial knee joint is a kind of organ with function of joint.Owing to reasons such as war, disease, industrial injury, traffic accident, unexpected injury and the aging of populations, cause millions of human synovial impaired, cause pain, limitation of activity and unstability.In China, nearly 3,000 ten thousand people need carry out the titanium alloy artificial knee joint and implant, and wherein imported product market accounts for 1/4, and main users is in big-and-middle-sized hospital, and the main users of homemade goods is the economic hospital of backward areas relatively.Along with the raising of science and technology development and living standards of the people, estimate that the kneed demand of titanium alloy artificial will constantly enlarge, a year growth is about 25%.Titanium alloy is to be applied to a kind of material that artificial knee joint is made the earliest, so far still have a wide range of applications clinically, wherein intensity, corrosion resistance and biocompatibility become one of representational tissue engineering material to titanium or titanium alloy owing to having preferably, occupy most articular prosthesis market.
Titanium alloy generally is divided into alpha titanium alloy, beta-titanium alloy and alpha+beta titanium alloys three classes by annealed structure.
Titanium is isomer, is the close-packed hexagonal character structure when temperature is lower than 882 ℃, is called the α titanium; Being the body-centered cubic lattic structure more than 882 ℃, be referred to as the β titanium.The various trades mark of titanium alloy are that the alloying element that adds variety classes and quantity in two kinds of different structure tissues of titanium forms.The trade mark of alpha titanium alloy has TA1～TA8.Beta titanium alloy has TB1, TB2, alpha and beta type titan alloy that TC1～TC10 is arranged.
Titanium alloy material has following mechanical performance:
(1) specific strength height, the intensity σ of alpha+beta titanium alloys commonly usedb=1.03～1.2GPa (103～12Okg/mm2), density p=4.4g/cm3, specific strength σb/ ρ=23～27; And the σ of steel alloyb=l.3～and 1.6GPa, density σ=7.9g/cm3, specific strength σ b/ ρ=16～20;
(2) hear resistance height, its operating temperature can reach 500 ℃, 300 1 350.The strength ratio aluminium alloy of titanium alloy is high 10 times under the C temperature.
(3) corrosion resistance is good, and the corrosion resistance in seawater and marine atmosphere is very high.
(4) thermal conductivity of titanium is little, is 1/4 of nickel, the l/S of iron, 1/16 of aluminium.The thermal conductivity of titanium alloy is lower, is about 1/2 of titanium.The thermal conductivity λ of TC4=7.955W/ (mK) o
(5) chemism is big, can play chemical combination with hydrogen, oxygen, nitrogen etc. in the atmosphere, and the temperature that begins strong absorption hydrogen, oxygen, nitrogen is respectively 300.C，50O。C and 600.C after these elements and the titanium alloy surface effect, has formed hard crisp top layer, and the degree of depth can reach 0.1～0.15mm, and hardenability is 20%～30%;
(6) elastic modelling quantity is little, the elastic modulus E=108GPa of titanium, and the elastic modelling quantity of titanium alloy will be lower than pure titanium, is about 55% of steel, so titanium alloy easily produces strain.At present the titanium alloy method that is used for grinding obtains the requirement of needed surface quality, polishing precision and surface integrity more.
The grinding characteristics of titanium alloy are as follows:
(1) during the big grinding titanium alloy of grinding force, the same with the general grinding rule, radial load is greater than tangential force.Titanium alloy intensity height is out of shape in the grinding process acutely, and emery wheel adheres to serious, so bigger 4 times than 45 steel approximately at the radial component of the same terms grinding TC9, tangential component is big by about 80%.
(2) swiping process proportion is big during the grinding of grinding temperature titanium master alloy, often form segmental chip, friction is serious, rapid elasticity, plastic deformation produce a large amount of grinding heats, cause the temperature of grinding area very high, and the thermal conductivity of titanium alloy only are 1/5 of carbon steel, make heat be difficult for distributing, under the same conditions, the grinding temperature of grinding TC9 is 1.5～2 times of 45 steel, 1000 ℃ of Gao Shikeda.
(3) easily produce the burn crackle because the grinding temperature height produces bigger thermal stress at grinding skin, grinding burn not only takes place easily, and the grinding micro-crack occurs.These micro-cracks are the hairline shape, and its direction is roughly vertical with the grinding direction, and grinding skin presents the yellowish-brown color spot.Because the influence of grinding heat, surface of the work produces residual tension, and part fatigue strength is reduced, and influences the service life of part.
(4) emery wheel adheres to inefficacy titanium alloy serious and easy to wear at the active height of high temeperature chemistry, at high temperature easily forms hardness very high hardened layer and embrittlement layer with element generation chemical reactions such as airborne oxygen, nitrogen, accelerates the wearing and tearing of emery wheel; In addition, the localized hyperthermia of grinding area, high pressure effect adhere to abrasive particle and metal surface.And the phase counterdiffusion of titanium alloy and abrasive particle chemical element causes diffusive wear under the high temperature, thereby accelerated the wear process of emery wheel.Emery wheel after the observation grinding, titanium are cloud and mist and distribute, and almost can't see the emery wheel abrasive particle.
When (5) surface quality was difficult for guaranteeing titanium alloy grinding, surface of the work easily produced harmful residual tension and surface contamination layer, and surface roughness value is bigger.Mill rear surface residual tension numerical values recited increases with the increasing of grinding dosage, and grinding speed is the major influence factors of residual tension.
When (6) production efficiency was hanged down titanium alloy grinding, emery wheel passivation easy to wear, adhesion were stopped up, and cause grinding ratio very low.Therefore, under the condition that guarantees desired part processing precision, be difficult to obtain higher productivity ratio.Under the same terms, the grinding ratio of grinding TC4 has only 1.53, and 45 steel are 71.5, are about 1/47 of 45 steel.
The polishing degree on titanium alloy artificial knee joint surface is to its function and fundamental influence is arranged service life.Titanium alloy extensively is used in artificial knee joint with the characteristic of its high-strength low-modulus, but there are defectives such as machinability is poor, thermal conductivity factor is low in the surface finishing of the titanium alloy processing at present, and titanium alloy artificial knee joint surface mostly is complex-curved, titanium alloy artificial knee joint polishing at present is mainly by manual operations, and quality of finish is difficult to satisfy clinical requirement.
Summary of the invention
Purpose of the present invention is exactly for addressing the above problem, provide a kind of titanium alloy artificial knee joint magnetorheological polishing processing device, this device has magnetic current liquid utilization rate height, quality of finish uniformity, can polish characteristics such as complex-curved, can satisfy present clinical demand fully.
For achieving the above object, the present invention adopts following technical scheme:
The magnetorheological polishing processing device of a kind of titanium alloy artificial knee joint is provided with workbench in the bottom of frame, and the workbench top is corresponding six-degree-of-freedom parallel bed; The magnetic current liquid loop of sealing and circulating links to each other with the magnetic current liquid passage of titanium alloy prosthese coupling, magnetic current liquid passage is placed on the support of workbench, and the installing hole of titanium alloy prosthese is left in the below of magnetic current liquid passage, seal washer is installed in the middle of magnetic current liquid passage and the titanium alloy prosthese, the titanium alloy prosthese is fixed in the press rods, and press rods is fixed on the support; The six-degree-of-freedom parallel bed is connected with electromagnet, and make electromagnet end face orbiting motion according to the rules, control size by the magnetic field intensity of magnetic current liquid by the gap of regulating magnet end face and magnetic current liquid channel surface, control in the magnetic current liquid abrasive particle to the size of titanium alloy surface cutting force with this; Six-degree-of-freedom parallel bed, electromagnet and magnetic current liquid loop are connected with control device.
Described magnetic current liquid loop comprises fluid reservoir, is provided with agitator in the fluid reservoir; Fluid reservoir is connected with infusion pipeline, infusion pipeline is connected with the woven hose branch road, the road of woven hose is connected with magnetic current liquid passage one end by the quick chuck II, the magnetic current liquid passage other end is connected with the liquid back pipe road by the quick chuck I, the liquid back pipe road is connected with fluid reservoir, is provided with delivery pump at infusion pipeline; Infusion pipeline also is connected with overflow passage, and overflow passage is connected with fluid reservoir; Delivery pump is connected with control device.
Described infusion pipeline branch road is provided with the pressure flow detector.
Described overflow passage is provided with overflow valve.
Be processed with locating hole I and locating hole II on the described press rods, the side of locating hole I and locating hole II is processed with two tapped through holes respectively, and corresponding trip bolt I and trip bolt II are installed.
Described electromagnet is connected with the six-degree-of-freedom parallel bed by magnetic isolation plate I, electromagnet is made up of iron core and coil windings, by control device control by the coil windings alternating current have or not to control having or not of electromagnetic field, or control the size of electromagnetic field intensity by the size of coil windings alternating current by control.
Installing hole edge below the described magnetic current liquid passage is stepped.
Described press rods upper surface fixedly has the magnetic isolation plate II.
The present invention adopts Technique of Magnetorheological Finishing polishing machining titanium alloy artificial knee joint, be to use magnetic field to change the viscosity of magnetic current liquid, magnetic current liquid constantly circulates between airtight pipeline, electromagnetic field makes between the solid phase in the liquid and constantly replaces, Magnetorheologicai polishing liquid is sent to titanium alloy surface by delivery pump, and it is mobile with certain speed, make its repeatedly round act on titanium alloy surface with the alternating electromagnet energising and by the six-degree-of-freedom parallel bed this moment, this polishing fluid just can produce magnetic rheology effect at respective regions under the effect of magnetic field, produce shear pressure in the contact zone and remove the surface of the work material.Material removal amount is determined by magnetic field intensity and polishing time.Because clearance is relevant with fluid viscosity, so clearance is very stable.By the monitoring and control make fluid viscosity remain on ± 1% in.Adjust clearance by the flow velocity and the magnetic field intensity that change magnetic current liquid, obtain high relatively stable material removing rate when producing smooth not damaged surface.Be different from the tradition polishing, the abrasive particle normal load can scratch surface of the work, and magnetorheological polishing relies on shear mode to remove material, and abrasive particle is not subjected to any normal force in normal orientation.
The advantage of magnetorheological polishing machining titanium alloy artificial knee joint is as follows:
(1) magnetorheological polishing processing is a kind of flexible polishing method, does not produce damaged surface layer, the working (machining) efficiency height, and surface roughness can reach nanoscale, can realize the polishing processing to complex surface;
(2) under the constant condition of other technological parameter, by controlling magnetic field intensity and Distribution of Magnetic Field and at the residence time of machining area, can realize the quantitative polishing to material;
(3) magnetic current liquid is not subjected to the influence of chemical impurity in making and using, and raw material are nontoxic, and are environmentally friendly.
Magnetic current liquid is that a kind of solid-liquid to magnetic-field-sensitive mixes two-phase liquid stream, its be magnetic particle, base fluid and surfactant is formed, the magnetic field particle is generally selected the spherical carbonyl iron micro mist of high saturation and magnetic intensity for use, and particle diameter is between 0.01～10 μ m, and proportion is approximately 7～8g/cm3Desirable magnetic current liquid must have good flowability when zero magnetic field, this requires the content of magnetic-particle can not be too big; Simultaneously magnetic current liquid should possess significant magnetic rheology effect under the effect of magnetic field, and this requires the content of magnetic field particle should be big as far as possible again, and its volumetric concentration is between 20%～50% usually.
Base fluid is the carrier of magnetic current liquid, require Heat stability is good, volatilization low, pollution-free, easily flow, insulation, exhausted magnetic, the base fluid difference then feature of magnetic current liquid is also different.In addition, base fluid also relates to the compatibility with magnetic-particle, and high-affinity is conducive to reduce the precipitation of particle, but can hinder its motion, thereby prolongs the response time; Low-affinity just in contrast.The base fluid that adopts has water, kerosene, ester, silicone oil, carbonization fluorine and polyphenylene oxide etc. at present.Because magnetic-particle is the mineral-type solia particle, do not dissolve or be difficult for being dispersed in the base fluid, therefore add surfactant between the solid-liquid two-phase of magnetic-particle and base fluid, it coats the surface of magnetic-particle, make it to be separated from each other, be suspended in the base fluid uniformly and stably.Surfactant must have the specific molecule structure, and an end has one to the functional group of magnetic-particle interface generation high affinity, and the other end also need have an elasticity group that very easily is scattered in suitable length in the base fluid.Surfactant package oil scraper acid commonly used, inferior acid acid, leukotrienes, silane coupler etc.
Add polishing powder in the magnetic current liquid and mix, just made Magnetorheologicai polishing liquid, it is flowable during zero magnetic field, yet under the outside magnetic field effect, the character of magnetic current liquid takes place sharply to change, and the magnetic field particles coalesce becomes chain structure, whole fluid shows the mechanical property of similar solid, polishing powder is stressed to float on the liquid level, removes that magnetic current liquid can recover mobile again after the external magnetic field, and the response time is extremely short.
Description of drawings
Fig. 1 is sectional structure chart of the present invention;
Fig. 2 is the artificial knee joint schematic diagram;
Fig. 3 is that the axle that waits of press rods is surveyed view;
Fig. 4 is the electromagnet schematic diagram.
Wherein, 1-six-degree-of-freedom parallel bed, 2-frame, 3-magnetic isolation plate I, 4-electromagnet core, 5-magnetic current liquid passage, 6-titanium alloy femoral prosthesis, 7-seal washer, 8-quick chuck I, 9-liquid back pipe road, 10-workbench, 11-support, 12-agitator, 13-fluid reservoir, 14-overflow passage, 15-infusion pipeline, 16-delivery pump, 17-overflow valve, 18-pressure flow detector, 19-quick chuck II, 20-pressure nut, 21-press rods, 22-integrated control panel, 23-trip bolt I, 24-trip bolt II, 25-locating hole I, 26-locating hole II, 27-femur, 28-meniscus prosthese, 29-tibial prosthesis, 30-shin bone, 31-coil windings, 32-magnetic isolation plate II, 33-infusion pipeline branch road.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the magnetorheological polishing processing device sectional structure chart of titanium alloy artificial knee joint, has wherein shown each building block of the magnetorheological polishing processing device of titanium alloy artificial knee joint.As shown in Figure 1,fluid reservoir 13 is fixed on the frame 2, wherein in thefluid reservoir 13agitator 12 is installed, and mixes in order to guarantee abrasive particle and magnetic-particle in the magnetic current liquid.The middle and upper part offluid reservoir 13 separately is connected withinfusion pipeline 15, anddelivery pump 16 is installed on theinfusion pipeline 15, anddelivery pump 16 just can transport out the magnetic current liquid in thefluid reservoir 13 with certain pressure like this.The other end ofinfusion pipeline 15 is told two branch roads, be respectively infusionpipeline branch road 33 andoverflow passage 14, whereinoverflow passage 14 other ends andfluid reservoir 13 lower ends communicate, and overflow valve 17 is installed in theoverflow passage 14, overflow valve 17 can play the effect of control infusionpipeline branch road 33 pressure sizes, in case because the pressure of infusionpipeline branch road 33 is excessive, the overflow valve 17 in theoverflow passage 14 will be unlocked, unnecessary magnetic current liquid will flow back in thefluid reservoir 13 by overflow passage 14.Pressure flow detector 18 is installed in the infusionpipeline branch road 33, with this pressure ininfusion pipeline 33 and flow is carried out dynamic monitoring.The exit of infusionpipeline branch road 33 is equipped with the quick chuck II, and the quick chuck II other end links to each other with magnetic current liquid passage 5.On theworkbench 10 of the magnetorheological polishing processing device of titanium alloy artificial knee joint support 11 is installed, magnetic current liquid passage 5 is placed on the support 11, wherein magnetic current liquid passage 5 and support 11 touching position shapes cooperatively interact, and reach stressed even with this, the effect of supporting ﹠ stablizing.Magnetic current liquid passage 5 uses reverse technology, the entity of titanium alloyfemoral prosthesis 6 is generated three-dimensional entity model by 3-D scanning, processed by fast prototype making process again, its external shape is similar with the curve form of titanium alloyfemoral prosthesis 6, and the material that adopts will have higher intensity, wearability, exhausted magnetic.The below of magnetic current liquid passage 5 is complete closed not, leave titanium alloyfemoral prosthesis 6 installing holes, the shape of installing hole is similar with the outer contour shape of titanium alloyfemoral prosthesis 6, but size is less relatively, the polishing processing of the titanium alloyfemoral prosthesis 6 of different size can be satisfied like this, the sealing that magnetic current liquid passage 5 and titanium alloyfemoral prosthesis 6 cooperate can be guaranteed again.In the middle of magnetic current liquid passage 5 and the titanium alloyfemoral prosthesis 6 seal washer is installed, the further like this sealing that cooperates that guaranteed.Installing hole edge below the magnetic current liquid passage 5 is stepped, can guarantee that like this magnetic current liquid enters into the polishing processing channel stably, avoids the impact to titanium alloy femoral prosthesis 6.Press rods 21 upper surfaces fixedly have magnetic isolation plate II 32 to prevent that 21 pairs of formed magnetic fields of electromagnet of press rods from disturbing to some extent.Be processed with locating hole I 25 and locating hole II 26 on thepress rods 21, the side of locating hole I 25 and locating hole II 26 is processed with two tapped through holes respectively, and corresponding trip bolt I 23 and trip bolt II 24(is installed as shown in Figure 3).Two fixed supporting legs of titanium alloyfemoral prosthesis 6 are put into corresponding locating hole I 25 and locating hole II 26, and fix by screwing 24 pairs of titanium alloyfemoral prosthesis 6 of trip bolt I 23 and trip bolt II.After titanium alloyfemoral prosthesis 6 andpress rods 21 fixed, pressrods 21 by the through hole on the support 11, and is screwed with pressure nut 20.Just form certain pressure between titanium alloyfemoral prosthesis 6 and the magnetic current liquid passage 5 like this, just can realize sealing between magnetic current liquid passage 5 and the titanium alloyfemoral prosthesis 6 by the control to pressure.The port of export of magnetic current liquid passage 5 links to each other with quick chuck I 8, quick chuck I 8 other ends link to each other with liquid back pipe road 9, liquid back pipe road 9 andfluid reservoir 13 lower ends communicate, whole like this magnetic current liquid all is in the polishing process in the airtight circulation line, has realized that the circulation of magnetic current liquid efficiently utilizes.A six-degree-of-freedom parallel bed 1 is installed on the frame 2 directly over the magnetic current liquid passage 5, fixedly has below the parallel machine 1 magnetic isolation plate I, magnetic isolation plate I can prevent that 1 pair of formed magnetic field of electromagnet of six-degree-of-freedom parallel bed from disturbing.Magnetic isolation plate I lower end is equipped withelectromagnet core 4, is wound withcoil windings 31 on theelectromagnet core 4, andelectromagnet core 4 andcoil windings 31 have been formed electromagnet, feeds corresponding alternating current again and just can form electromagnetic field.As shown in Figure 4,electromagnet core 4 be shaped as a cuboid, the length of cuboid is bigger slightly than the width of titanium alloyfemoral prosthesis 6, can guarantee that like this magnetic field that electromagnet forms can cover titanium alloyfemoral prosthesis 6 fully, guarantees quality and the efficient of polishing processing.Six-degree-of-freedom parallel bed 1 can guarantee electromagnet end face orbiting motion according to the rules, so the surface function of magnetic current liquid passage 5 is input in the intelligence control system of six-degree-of-freedom parallel bed 1 and just can guarantees that the electromagnet end face moves back and forth according to the curved surface of magnetic current liquid passage 5, in this process, can also control size by the magnetic field intensity of magnetic current liquid by the gap on control electromagnet end face and magnetic current liquid passage 5 surfaces, control in the magnetic current liquid abrasive particle to the size of titanium alloy surface active force with this.Integrated control panel 22 is installed on the frame 2, and integratedcontrol panel 22 can be controlled each amount in the whole polishing process, and it can pass through the size of the flow ofcontrol delivery pump 16, thus pressure and flow velocity in the control magnetic current liquid passage 5; Can also control electric current in thecoil windings 31 in the electromagnet have or not and size is come the size with magnetic induction intensity of having or not of controlling magnetic field; Movement locus and back and forth movement number of times by control six-degree-of-freedom parallel bed 1 are controlled polishing locus and polishing time.
Fig. 2 is the artificial knee joint schematic diagram, mainly is made up offemur 27, titanium alloyfemoral prosthesis 6,meniscus prosthese 28,tibial prosthesis 29 andshin bone 30 by scheming as can be known the artificial knee joint part.Wherein titanium alloyfemoral prosthesis 6 mainly substitutes the cartilages that were grown in originally on the femur, andmeniscus prosthese 28 has replaced being grown in the cartilage on theshin bone meniscus prostheses 28 of tibial prosthesis play fixed supporting role, and with bone cement titanium alloyfemoral prosthesis 6 andtibial prosthesis 29 are separately fixed onfemur 27 and the shin bone 30.Just formed sliding pair between titanium alloyfemoral prosthesis 6 and themeniscus prosthese 28 like this, realized substituting biological knee joint with artificial knee joint.
The course of work of the present invention is as follows:
Before carrying out polishing process, to do some corresponding preparations.At first to use reverse technology, the entity of titanium alloyfemoral prosthesis 6 is generated three-dimensional entity model by 3-D scanning, process magnetic current liquid passage 5 by fast prototype making process again, magnetic current liquid passage 5 external shape are similar with the curve form of titanium alloyfemoral prosthesis 6, and guaranteeing the corresponding points normal direction apart from unanimity, the material that adopts will have higher intensity, wearability and exhaustedmagnetic.Seal washer 7 is placed on titanium alloyfemoral prosthesis 6 lower surfaces then, again two supporting leg correspondences of titanium alloyfemoral prosthesis 6 are placed in the locating hole I 25 and locating hole II 26 on thepress rods 21, and tighten trip bolt I 23 and 24 pairs of titanium alloyfemoral prosthesis 6 of trip bolt II are fixed.Titanium alloyfemoral prosthesis 6 is installed in the magnetic current liquid passage 5, guarantee positional precision, thenpress rods 21 lower ends are tightened in the support 11 bypressure nut 20, so just between titanium alloyfemoral prosthesis 6 and magnetic current liquid passage 5, formed certain pressure, andseal washer 7 has guaranteed the seal of the two joint.Utilize quick chuck I 8 that infusionpipeline branch road 33 is linked to each other with magnetic current liquid passage 5 at last, utilize quick chuck II 19 that magnetic current liquid passage 5 is linked to each other with liquid back pipe road 9.
Just carry out polishing after finishing prerequisite preparation.Start delivery pump 16 by integratedcontrol panel 22, magnetic current liquid in thefluid reservoir 13 is transported in theinfusion pipeline 15 with certain flow, the other end ofinfusion pipeline 15 is told two branch roads, be respectively infusionpipeline branch road 33 andoverflow passage 14, whereinoverflow passage 14 other ends andfluid reservoir 13 lower ends communicate, and overflow valve 17 is installed in theoverflow passage 14, overflow valve 17 can play the effect of control infusionpipeline branch road 33 pressure sizes, because in case the pressure of infusionpipeline branch road 33 is excessive, overflow valve 17 in theoverflow passage 14 will be unlocked, and unnecessary magnetic current liquid will flow back in thefluid reservoir 13 by overflow passage 14.Pressure flow detector 18 is installed in the infusionpipeline branch road 33, with this pressure ininfusion pipeline 33 and flow is carried out dynamic monitoring, control is in a reasonable range.Magnetic current liquid just can flow in the magnetic current liquid passage 5 smoothly like this, and flows back in thefluid reservoir 13 along liquid back pipe road 9, forms an airtight closed circuit.In guaranteeing whole sealing and circulating loop, do not have under the situation that magnetic current liquid reveals the Mathematical Modeling of titanium alloyfemoral prosthesis 6 is imported in the intelligence control system of six-degree-of-freedom parallel bed 1, configure the electromagnet end face along the movement locus on magnetic current liquid passage 5 surfaces, and configure reciprocating frequency and polishing time.Electromagnet feeds alternating current the most at last, and then magnetic current liquid just is under the magnetic field effect of electromagnet, and along with magnetic rheology effect takes place, the viscosity of magnetic current liquid will change, thereby makes the abrasive particle in the magnetic current liquid polish titanium alloyfemoral prosthesis 6 surfaces.Because magnetic field moves reciprocatingly by the surface of magnetic current liquid passage 5 equally, so can guarantee the uniformity consistency of final polishing effect.
Finish after the polishing process through certain hour, close electric current in six-degree-of-freedom parallel bed 1 and the electromagnet by integratedcontrol panel 22,stop delivery pump 16 then.Unclamppressure nut 20 this moment, titanium alloyfemoral prosthesis 6 is taken out from magnetic current liquid passage 5, unclamp trip bolt I 23 and trip bolt II 24 then, unload titanium alloyfemoral prosthesis 6 and oven dry is washed on its surface, so just finished the magnetorheological polishing process of whole titanium alloyfemoral prosthesis 6.
Claims (8)
1. the magnetorheological polishing processing device of titanium alloy artificial knee joint is characterized in that, is provided with workbench in the bottom of frame, and the workbench top is corresponding six-degree-of-freedom parallel bed; The magnetic current liquid loop of sealing and circulating links to each other with the magnetic current liquid passage of shape with titanium alloy prosthese coupling, magnetic current liquid passage is placed on the support of workbench, and the installing hole of titanium alloy prosthese is left in the below of magnetic current liquid passage, seal washer is installed in the middle of magnetic current liquid passage and the titanium alloy prosthese, the titanium alloy prosthese is fixed in the press rods, and press rods is fixed on the support; The six-degree-of-freedom parallel bed is connected with electromagnet, and make electromagnet end face orbiting motion according to the rules, control size by the magnetic field intensity of magnetic current liquid by the gap of regulating magnet end face and magnetic current liquid channel surface, control in the magnetic current liquid abrasive particle to the size of titanium alloy surface cutting force with this; Six-degree-of-freedom parallel bed, electromagnet and magnetic current liquid loop are connected with control device.
2. the magnetorheological polishing processing device of titanium alloy artificial knee joint as claimed in claim 1 is characterized in that, described magnetic current liquid loop comprises fluid reservoir, is provided with agitator in the fluid reservoir; Fluid reservoir is connected with infusion pipeline, infusion pipeline is connected with the woven hose branch road, the road of woven hose is connected with magnetic current liquid passage one end by the quick chuck II, the magnetic current liquid passage other end is connected with the liquid back pipe road by the quick chuck I, the liquid back pipe road is connected with fluid reservoir, is provided with delivery pump at infusion pipeline; Infusion pipeline also is connected with overflow passage, and overflow passage is connected with fluid reservoir; Delivery pump is connected with control device.
3. the magnetorheological polishing processing device of titanium alloy artificial knee joint as claimed in claim 2 is characterized in that, described transfusion branch road is provided with the pressure flow detector.
4. the magnetorheological polishing processing device of titanium alloy artificial knee joint as claimed in claim 2 is characterized in that described overflow passage is provided with overflow valve.
5. the magnetorheological polishing processing device of titanium alloy artificial knee joint as claimed in claim 1, it is characterized in that, be processed with locating hole I and locating hole II on the described press rods, the side of locating hole I and locating hole II is processed with two tapped through holes respectively, and corresponding trip bolt I and trip bolt II are installed.
6. the magnetorheological polishing processing device of titanium alloy artificial knee joint as claimed in claim 1, it is characterized in that, described electromagnet is connected with the six-degree-of-freedom parallel bed by magnetic isolation plate I, electromagnet is made up of iron core and coil windings, by control device control by the coil windings alternating current have or not to control having or not of electromagnetic field, or control the size of electromagnetic field intensity by the size of coil windings alternating current by control.
7. the magnetorheological polishing processing device of titanium alloy artificial knee joint as claimed in claim 1 is characterized in that, the installing hole edge below the described magnetic current liquid passage is stepped.
8. the magnetorheological polishing processing device of titanium alloy artificial knee joint as claimed in claim 1 is characterized in that, described press rods upper surface fixedly has the magnetic isolation plate II.
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| CN110640614A (en)* | 2019-10-16 | 2020-01-03 | 浙江工业大学 | A negative pressure polishing device and method for polishing blind holes of conductive workpieces |
| WO2021008129A1 (en)* | 2019-07-18 | 2021-01-21 | 浙江科惠医疗器械股份有限公司 | Magneto-rheological polishing machine for ceramic lining in metal acetabulum |
| CN118404480A (en)* | 2024-07-02 | 2024-07-30 | 徐州荣腾智能装备研究院有限公司 | A multi-bend round tube grinding device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951369A (en)* | 1999-01-06 | 1999-09-14 | Qed Technologies, Inc. | System for magnetorheological finishing of substrates |
| US6106380A (en)* | 1995-10-16 | 2000-08-22 | Byelocorp Scientific, Inc. | Deterministic magnetorheological finishing |
| CN101195206A (en)* | 2006-09-29 | 2008-06-11 | 德普伊产品公司 | Orthopaedic component manufacturing method and equipment |
| CN101352826A (en)* | 2008-09-28 | 2009-01-28 | 清华大学 | Method and device for polishing inner concave surface of optical element |
| US20110028071A1 (en)* | 2009-08-03 | 2011-02-03 | Lawrence Livermore National Security, Llc | Method and system for processing optical elements using magnetorheological finishing |
| KR20110138005A (en)* | 2010-06-18 | 2011-12-26 | 인하대학교 산학협력단 | Polishing apparatus and polishing method using magnetorheological fluid |
| CN203282284U (en)* | 2013-06-06 | 2013-11-13 | 青岛理工大学 | Magnetorheological polishing device for titanium alloy artificial knee joint |
- 2013
- 2013-06-06CNCN201310223323.2Apatent/CN103252686B/enactiveActive
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6106380A (en)* | 1995-10-16 | 2000-08-22 | Byelocorp Scientific, Inc. | Deterministic magnetorheological finishing |
| US5951369A (en)* | 1999-01-06 | 1999-09-14 | Qed Technologies, Inc. | System for magnetorheological finishing of substrates |
| CN101195206A (en)* | 2006-09-29 | 2008-06-11 | 德普伊产品公司 | Orthopaedic component manufacturing method and equipment |
| CN101352826A (en)* | 2008-09-28 | 2009-01-28 | 清华大学 | Method and device for polishing inner concave surface of optical element |
| US20110028071A1 (en)* | 2009-08-03 | 2011-02-03 | Lawrence Livermore National Security, Llc | Method and system for processing optical elements using magnetorheological finishing |
| KR20110138005A (en)* | 2010-06-18 | 2011-12-26 | 인하대학교 산학협력단 | Polishing apparatus and polishing method using magnetorheological fluid |
| CN203282284U (en)* | 2013-06-06 | 2013-11-13 | 青岛理工大学 | Magnetorheological polishing device for titanium alloy artificial knee joint |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909468B (en)* | 2014-04-04 | 2017-01-11 | 常熟理工学院 | Magnetorheological-elastomer-based parallel power control device |
| CN103909468A (en)* | 2014-04-04 | 2014-07-09 | 常熟理工学院 | Magnetorheological-elastomer-based parallel power control device |
| CN104690652A (en)* | 2015-02-13 | 2015-06-10 | 浙江工业大学 | Turbulent processing device for soft abrasive flow of artificial joint |
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| WO2021008129A1 (en)* | 2019-07-18 | 2021-01-21 | 浙江科惠医疗器械股份有限公司 | Magneto-rheological polishing machine for ceramic lining in metal acetabulum |
| CN110480425A (en)* | 2019-08-14 | 2019-11-22 | 陕西科技大学 | A kind of special-shaped metal tubes polishing device for inner wall and method |
| CN110480425B (en)* | 2019-08-14 | 2021-07-27 | 陕西科技大学 | A device and method for polishing the inner wall of a special-shaped metal tube |
| CN110497254A (en)* | 2019-08-15 | 2019-11-26 | 中国科学院长春光学精密机械与物理研究所 | A high-speed electromagnetic polishing device for complex curved surfaces with small and medium diameters |
| CN110497254B (en)* | 2019-08-15 | 2021-11-02 | 中国科学院长春光学精密机械与物理研究所 | A high-speed electromagnetic polishing device for small and medium-diameter complex curved surfaces |
| CN110640614A (en)* | 2019-10-16 | 2020-01-03 | 浙江工业大学 | A negative pressure polishing device and method for polishing blind holes of conductive workpieces |
| CN110640614B (en)* | 2019-10-16 | 2024-04-09 | 浙江工业大学 | Negative pressure polishing device and method for polishing blind holes of conductive workpiece |
| CN118404480A (en)* | 2024-07-02 | 2024-07-30 | 徐州荣腾智能装备研究院有限公司 | A multi-bend round tube grinding device |
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