CN1597193A - Fast forming micro manufacturing method for non homogeneous functional device - Google Patents
Fast forming micro manufacturing method for non homogeneous functional device Download PDFInfo
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- CN1597193A CN1597193A CN 200410026371 CN200410026371A CN1597193A CN 1597193 A CN1597193 A CN 1597193A CN 200410026371 CN200410026371 CN 200410026371 CN 200410026371 A CN200410026371 A CN 200410026371A CN 1597193 A CN1597193 A CN 1597193A
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Abstract
A fast shaping process for preparing the heterogeneous functional microdevice includes such steps as respectively loading the metal, alloy, or non-metal material in different liquid drop generators, loading the low-smelting-point alloy or non-metal material as substrate in another liquid drop generator, sealing the vacuum chamber, regulating each control system, shaping by depositing, loading it in smelting furnace, and removing substrate.
Description
Technical field
The present invention relates to a kind of heterogeneous body function element little manufacture method of shaping fast.
Background technology
The heterogeneous body function element is made up of multiple material, and its microstructure change is inhomogeneous, can form the device that forms some specific function according to material, has application prospect at aerospace field.By metal, pottery, nonmetal etc. compound cleverly, the heterogeneous body function element has bigger potential application foreground in fields such as nuclear energy, electronics, optics, electromagnetism, biomedicines.Because the manufacture method more complicated of heterogeneous body function element, can select different manufacture methods according to the shape of device and function etc., therefore people are exploring suitable heterogeneous body function element manufacture method, realize heterogeneous body function element low cost, the high efficiency manufacturing.
Rapid prototyping is made (rapid prototyping ﹠amp; Manufacturing, RPM) the rapid-result shape (RP) of expressing one's gratification again is to develop novel rapidly advanced manufacturing technology.It resolves into the two dimensional surface data with 3D solid, and successively processing finally forms product.It has broken through traditional cooked mode, does not need prefabricated core or other Aided Machine process equipment, utilizes computer graphics data can make the very complicated workpiece of shape apace.Though RP technique can produce complicated structural member, in existing commercial fast former, only under relatively low temperature environment, produce, and the formation of parts of producing is made up of low temperature polymerization material or poly-nytron material.These low-melting materials only have middle low-intensity, can't satisfy engineering use in to the requirement of part strength.
Document " Design and Operation of a Droplet Deposition System for FreeformFabrication of Metal Parts.Journal of Engineering Materials and Technology.JANUARY2001; Vol.123.pp:74-84. " has been introduced A.A.Tseng, M.H.Lee, B.Zhao. " symmetrical liquid drop injecting technology (Uniform Droplet Spray, UDS) " this technique functions that waits comes from the little piezo inkjet technology of ink-jet printer.The operation principle of symmetrical liquid drop injecting technology is: blasting materials is melted, melted material is sprayed and in the high velocity jet process jet is separated into the molten melt drop of uniformity by nozzle, by single molten melt drop is charged, utilize the control of electrode deflection and substrate motion, drop is deposited on the substrate exactly, forms part.Because the quick curing of drop make the micro-structural performance of product have significant improvement than other little manufacture method, and manufacture process can once be finished production precision height, direct economy in the integration environment.
California, USA university adopts the UDS technology to produce to the turbine structure spare of the tiny engine of unmanned plane in the aviation, and analyzes the mechanical property of product; Studies show that adopting Al-to drip the product that deposition obtains will improve 30% than with pure Al-piece product on tensile strength properties, and the basic no change of the density of product, find out that Al-drips and deposits product and have good microstructure features by the SEM photo.UDS technological break-through the restriction of other RP technique on material, the low melting point nonmetallic materials that both can be shaped, the high-melting point metal material also can be shaped; Compare with other RP technique, have advantages such as low cost, low energy consumption, compare with traditional preparation method of powder, cost only is its about 40%, and product need not to carry out post processing.
Also there is following shortcoming in existing UDS technology: as spraying single nonmetallic materials or metal material; The product geometry is simple, and function singleness can't satisfy wear-resistant to micro part in the Aerospace Engineering, high strength, corrosion-resistant etc. requirement.
Summary of the invention
The present invention is directed to the shortcoming that existing UDS technology exists, a kind of heterogeneous body function element little manufacture method of shaping fast is provided, according to the symmetrical liquid drop injecting principle, architectural feature with part, material characteristics and functional character combine, the utilization computer is designed for uniformity, and adopts multiple material to carry out the production of heterogeneous body function element, produces the heterogeneous body function element with specific function.
The technical solution adopted for the present invention to solve the technical problems is: a kind of heterogeneous body function element is the little manufacture method of shaping fast, it is characterized in that following method step:
1) according to the requirement of making the heterogeneous body function element, different metals, alloy material or nonmetallic materials are put into different drop generating devices respectively as moulding material, low melting point alloy or nonmetallic materials are put into another drop generating device as backing material, then vacuum chamber is sealed;
2) start the inert gas pressure control system, feed inert gas for vacuum chamber and each drop generating device, detect the concentration of oxygen in the vacuum chamber,, stop the inert gas input when oxygen content concentration during less than 5～50PPM with the oxygen content detector;
3) start vacuum extractor, vacuum chamber and each drop generating device are vacuumized, make vacuum reach 10
-4～10
-5Torr;
4) start-up temperature control system to each drop generating device heating 6～7 hours, and keeps the material melt temperature in each drop generating device to be higher than 5～10 ℃ of material melting point;
5) each drop generating device is fed inert gas, and adjust pressure in each drop generating device between 100～500KPa;
6) signal of telecommunication that signal generator is produced is imported the piezoelectric oscillator in the different drop generating devices respectively, drive is soaked the vibrating disk that stagnates in the material liquation and is done mechanical oscillation, making melted material spray fluid generation vibration frequency is the vibration of 5～30kHz same frequency, makes jet can fragment into drop;
7) adopt CAD software to set up the threedimensional model (STL) of the heterogeneous body function element that will be shaped, and threedimensional model carried out the two dimension slicing graphic processing data, computer control system is exported the voltage that changes charging ring and deflecting electrode according to slice of data, make drop through when ring of overcharging can be by selectivity charged, when the electric field of charged drop by producing by deflecting electrode, different drops is according to size deflection under electric field action of carried charge, it is 200～400V that computer control system is adjusted deflection voltage automatically according to heterogeneous body function element two dimensional slice data, make different drops produce different side-play amounts, the simultaneous computer control system is controlled the substrate motion control system automatically and is made deposition substrate speed motion with 0.1～1m/s in X-Y plane, at the Z-direction moving linearly, make drop be deposited on the computer control system assigned address exactly, unnecessary drop then deflection feed liquor drips in the retracting device;
8) after deposition is finished, will deposit parts and put into smelting furnace removal backing material, obtain the heterogeneous body function element.
Described signal generator can change the fracture position of different materials jet, function of jet velocity, liquid-drop diameter and drop ejection frequency by amplitude, the frequency of regulating output signal.
Described substrate temperature control system can make the deposition substrate temperature remain on 250～450 ℃.
The invention has the beneficial effects as follows that can be shaped multiple nonmetallic materials or metal material can be made complicated microminiature parts; Material is chosen in functional requirement according to device, satisfies the various specific functions of device, as wear-resistant, high strength, corrosion-resistant etc.Can also be used to make polymer and other material parts, have actual application value at aspect such as biomedical, civilian.
Description of drawings
Accompanying drawing is a flow chart of the present invention
The specific embodiment
Embodiment 1: with reference to accompanying drawing.Shaping heterogeneous body micro hollow cylinder, it is of a size of: the open circles column length is 20mm, and external diameter is Φ 10mm, and internal diameter is Φ 4mm.Wherein in the Φ 4～6mm of hollow cylinder cross section, material is cast copper alloy ZCuAl8Mn13Fe3Ni2, and hollow cylinder cross section Φ 6～10mm material is made up of Birmasil ZL301 non-uniform Distribution.According to the distribution of material of hollow cylinder, generate the hollow cylinder threedimensional model with Pro-engineer; With 0.05mm length cylinder is divided into a series of two-dimentional open circles along the Z axle with software Solid View, forms two dimensional slice data, and with its preservation; The moulding material cast copper alloy is put into drop generating device 1, and Birmasil is put into drop generating device 2, and vacuum chamber is sealed; Feed nitrogen for vacuum chamber, drop generating device 1 and drop generating device 2, detect the concentration of oxygen in the vacuum chamber with the oxygen content detector; When oxygen content during, stop to import nitrogen less than 5PPM; With vavuum pump vacuum chamber is vacuumized, when the indoor vacuum of vacuum less than 10
-5During Torr, stop vacuum chamber being vacuumized; Drop generating device 1 heating 7 hours makes its temperature about 995 ℃, and drop generating device 2 heating 6 hours make its temperature about 605 ℃, make copper alloy and aluminium alloy all melt; Drop generating device 1 and drop generating device 2 are fed nitrogen respectively, make that drop generating device 1 and drop generating device 2 respectively can jet copper alloy and molten aluminium alloy jet, regulate pressure valve and make that gas pressures all remain on about 150KPa in drop generating device 1 and the drop generating device 2; With frequency is that the sinusoidal signal of 5KHz is imported respectively in drop generating device 1 and the drop generating device 2, regulates the amplitude of the sinusoidal signal of input drop generating device 1, is about 80 microns drop up to drop generating device 1 ejection diameter; Same sinusoidal signal of regulating in the input drop generating device 2 makes drop generating device 2 ejection diameters be about 80 microns drop; When annulus that the shaping copper alloy constitutes, drop generating device 1 forwards eject position to, computer is regulated charging ring and deflection voltage 200V automatically according to the X-Y scheme data, make liquid droplets deflect, substrate speed with 0.1m/s in X-Y plane is done straight reciprocating motion simultaneously, is controlled at substrate temperature at 360～450 ℃ according to ejection liquid-drop diameter size and substrate dropping distance; Drop is deposited on exactly and forms annulus on the substrate, and unnecessary drop then deflection feed liquor drips in the retracting device; After interior annulus is finished, rotate drop generating device 2 to eject position, the deposition of aluminum alloy forms annulus in the same way; Whenever finish the layer of material deposition, substrate moves down about 50 microns, and computer continues to read the accumulation that two dimensional slice data begins another layer material, and every layer of circle progressively superposes, run through whole two dimensional slice data up to computer, mold till the heterogeneous body micro hollow cylinder.The process of whole shaping heterogeneous body micro hollow cylinder is by the monitoring camera-shooting assembly monitor.
Embodiment 2: with reference to accompanying drawing.Same shaping heterogeneous body micro hollow cylinder, it is of a size of: the open circles column length is 20mm, and external diameter is Φ 10mm, and internal diameter is Φ 4mm.Wherein in the Φ 4～8mm of hollow cylinder cross section, material is cast copper alloy ZCuAl8Mn13Fe3Ni2, and hollow cylinder cross section Φ 8～10mm material is made up of Birmasil ZL301 non-uniform Distribution.According to the distribution of material of hollow cylinder, generate the hollow cylinder threedimensional model with Pro-engineer; With 0.12mm length cylinder is divided into a series of two-dimentional open circles along the Z axle with software Solid View, forms two dimensional slice data, and with its preservation; The moulding material cast copper alloy is put into drop generating device 1, and Birmasil is put into drop generating device 2, and vacuum chamber is sealed; Feed nitrogen for vacuum chamber, drop generating device 1 and drop generating device 2, detect the concentration of oxygen in the vacuum chamber with the oxygen content detector; When oxygen content during, stop to import nitrogen less than 50PPM; With vavuum pump vacuum chamber is vacuumized, when the indoor vacuum of vacuum less than 10
-4During Torr, stop vacuum chamber being vacuumized; Drop generating device 1 heating 7 hours makes its temperature about 995 ℃, and drop generating device 2 heating 6 hours make its temperature about 605 ℃, make copper alloy and aluminium alloy all melt; Drop generating device 1 and drop generating device 2 are fed nitrogen respectively, make that drop generating device 1 and drop generating device 2 respectively can jet copper alloy and molten aluminium alloy jet, regulate pressure valve and make that gas pressures all remain on about 500KPa in drop generating device 1 and the drop generating device 2; With frequency is that the sinusoidal signal of 30KHz is imported respectively in drop generating device 1 and the drop generating device 2, regulates the amplitude of the sinusoidal signal of input drop generating device 1, is about 150 microns drop up to drop generating device 1 ejection diameter; Same sinusoidal signal of regulating in the input drop generating device 2 makes drop generating device 2 ejection diameters be about 150 microns drop; When annulus that the shaping copper alloy constitutes, drop generating device 1 forwards eject position to, computer is regulated charging ring and deflection voltage 400V automatically according to the X-Y scheme data, make liquid droplets deflect, substrate speed with 0.3m/s in X-Y plane is done straight reciprocating motion simultaneously, is controlled at substrate temperature at 250～350 ℃ according to ejection liquid-drop diameter size and substrate dropping distance; Drop is deposited on exactly and forms annulus on the substrate, and unnecessary drop then deflection feed liquor drips in the retracting device; After interior annulus is finished, rotate drop generating device 2 to eject position, the deposition of aluminum alloy forms annulus in the same way; Whenever finish the layer of material deposition, substrate moves down about 120 microns, and computer continues to read the accumulation that two dimensional slice data begins another layer material, and every layer of circle progressively superposes, run through whole two dimensional slice data up to computer, mold till the heterogeneous body micro hollow cylinder.The process of whole shaping heterogeneous body micro hollow cylinder is by the monitoring camera-shooting assembly monitor.
Claims (3)
1, the quick little manufacture method that is shaped of a kind of heterogeneous body function element is characterized in that following method step:
1) according to the requirement of making the heterogeneous body function element, different metals, alloy material or nonmetallic materials are put into different drop generating devices respectively as moulding material, low melting point alloy or nonmetallic materials are put into another drop generating device as backing material, then vacuum chamber is sealed;
2) start the inert gas pressure control system, feed inert gas for vacuum chamber and each drop generating device, detect the concentration of oxygen in the vacuum chamber,, stop the inert gas input when oxygen content concentration during less than 5～50PPM with the oxygen content detector;
3) start vacuum extractor, vacuum chamber and each drop generating device are vacuumized, make vacuum reach 10
-4～10
-5Torr;
4) start-up temperature control system to each drop generating device heating 6～7 hours, and keeps the material melt temperature in each drop generating device to be higher than 5～10 ℃ of material melting point;
5) each drop generating device is fed inert gas, and adjust pressure in each drop generating device between 100～500KPa;
6) signal of telecommunication that signal generator is produced is imported the piezoelectric oscillator in the different drop generating devices respectively, drive is soaked the vibrating disk that stagnates in the material liquation and is done mechanical oscillation, making melted material spray fluid generation vibration frequency is the vibration of 5～30kHz same frequency, makes jet can fragment into drop:
7) adopt CAD software to set up the threedimensional model (STL) of the heterogeneous body function element that will be shaped, and threedimensional model carried out the two dimension slicing graphic processing data, computer control system is exported the voltage that changes charging ring and deflecting electrode according to slice of data, make drop through when ring of overcharging can be by selectivity charged, when the electric field of charged drop by producing by deflecting electrode, different drops is according to size deflection under electric field action of carried charge, it is 200～400V that computer control system is adjusted deflection voltage automatically according to heterogeneous body function element two dimensional slice data, make different drops produce different side-play amounts, the simultaneous computer control system is controlled the substrate motion control system automatically and is made deposition substrate speed motion with 0.1～1m/s in X-Y plane, at the Z-direction moving linearly, make drop be deposited on the computer control system assigned address exactly, unnecessary drop then deflection feed liquor drips in the retracting device;
8) after deposition is finished, will deposit parts and put into smelting furnace removal backing material, obtain the heterogeneous body function element.
2, the quick little manufacture method that is shaped of heterogeneous body function element according to claim 1, it is characterized in that: described signal generator, can change the fracture position of different materials jet by amplitude, the frequency of regulating output signal, function of jet velocity, liquid-drop diameter and drop ejection frequency.
3, the quick little manufacture method that is shaped of heterogeneous body function element according to claim 1, it is characterized in that: described substrate temperature control system can make the deposition substrate temperature remain on 250～450 ℃.
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| CN102665937A (en) * | 2009-11-10 | 2012-09-12 | 索尼公司 | Method for formation of three-dimensional shaped article and device for formation thereof |
| CN103586466A (en) * | 2012-12-26 | 2014-02-19 | 机械科学研究总院先进制造技术研究中心 | Multi-metal liquid spray deposition additive manufacturing method |
| CN103600072A (en) * | 2012-12-26 | 2014-02-26 | 机械科学研究总院先进制造技术研究中心 | Multi-metal liquid injection deposition material-increase manufacturing device |
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