CN102328091A - Powder feeding and mixing device for preparing magnetic grinding material through atomization and rapid solidification and powder feeding and mixing method - Google Patents
Powder feeding and mixing device for preparing magnetic grinding material through atomization and rapid solidification and powder feeding and mixing method Download PDFInfo
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- CN102328091A CN102328091A CN201110156047A CN201110156047A CN102328091A CN 102328091 A CN102328091 A CN 102328091A CN 201110156047 A CN201110156047 A CN 201110156047A CN 201110156047 A CN201110156047 A CN 201110156047A CN 102328091 A CN102328091 A CN 102328091A
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Abstract
The invention provides a powder feeding and mixing device for preparing a magnetic grinding material through atomization and rapid solidification and a powder feeding and mixing method. The powder feeding and mixing device comprises a powder feeding device and a powder mixing device. The powder feeding and mixing control method comprises the following steps in the specification, wherein the steps 1 and 2 are combined to achieve the purposes of (1) regulating a material control valve to a maximum opening degree, and (2) regulating the opening degree of a balancing valve and simultaneously observing a pressure displayed by a balance barometer, wherein the pressure of the balance barometer is regulated to be 0.05-0.5MPa; the steps 1, 2 and 3 are combined to realize regulation of blowing pressure; the steps 1 and 6 are combined to realize regulation of controlling and debugging pressure of jet flows of a flow mixing pipe; the steps 1, 2, 3, 6 and 7 are combined to realize the flow regulation of hard grinding materials; and the steps 6, 7 and 8 are combined to realize the regulation of control pressure for the jet flows of the flow mixing pipe. Under the action of the powder feeding and mixing pipe, the hard grinding materials in the flow mixing pipe are fully mixed with high-pressure gas so as to form a gas-solid two phase flow. According to the invention, an important condition is provided for a novel method for preparing the magnetic grinding material.
Description
Technical field
The present invention provides a kind of pneumatic atomizing rapid condensation magnetic abrasive material preparation to send meal mixer and send mixed powder control method, belongs to the magnetic abrasive finishing preparing technical field.
Background technology
Magnetic abrasive finishing polishing process technology is a kind of new polishing processing technology that magnetic field application is developed in traditional grinding technique; It is a kind of very excellent polishing processing method; Be to improve the effectively technological means of product surface quality.There is plurality of advantages technically in this method: flexibility, adaptivity, self-sharpening, controllability, temperature rise is little and need not carry out tool wear compensation, need not correction of the flank shape etc. characteristics; Also avoided complicated requirement simultaneously, can realize the grinding polishing processing of 3 D complex curved surface and solve automation issues the grinding tool head construction; And can reduce the manufacturing cost of part, thereby caused extensive studies at home and abroad.The preparation method of magnetic abrasive has a variety ofly in the prior art, and they can be divided three classes substantially: mechanical mixing, composite method, reaction casting.
Mechanical mixing is that ferromagnetic powder, abrasive powders and lapping liquid etc. are evenly mixed by a certain percentage at normal temperatures, directly carries out the method for attrition process.Ferromagnetic powder and the abrasive powders such as the Al of certain particle size commonly used
2O
3, SiC, Cr
2O
3, after TiC etc. mixes, add adhesive such as oleic acid, polyethylene glycol, silica gel etc. again and process.This kind method can be processed multiple magnetic abrasive, and preparation technology is simple, and cost is low, but during grinding, abrasive grain and Magnaglo comparison easy separation are dispersed, and grinding efficiency is low, has limited range of application.
See that from the angle of materialogy magnetic abrasive is a kind of composite powder, i.e. iron-based grains enhanced type composite material powder.It is the heterogeneous material of being processed through certain combination process by two or more material, and its performance obviously is superior to raw material in particular aspects.Along with the development that composite is learned, the technology of preparing of magnetic abrasive has also obtained corresponding development, and its preparation technology has many kinds, mainly contains sintering process, mull technique, composite deposite method etc.
Sintering process is that present magnetic abrasive prepares the most frequently used method.In Japan, this method successfully is applied in the suitability for industrialized production.According to the difference of concrete sintering condition, it is divided into normal pressure-sintered, hot pressed sintering, laser sintered, microwave sintering etc. again.Owing to the processing characteristics and the service life of magnetic abrasive, certainly be taken at abrasive particle and ferromagnetic bond strength mutually to a great extent.The magnetic abrasive of sintering process preparation has the abrasive material of considerable part to be separated with ferromagnetic in mechanical disintegration, screening process, causes the ferromagnetic intensity that combines with abrasive particle to reduce, and durability descends.
Mull technique is divided into inorganic bond and organic adhesive according to the difference of selecting for use binding agent; Be that certain proportion, the ferromagnetic powder that mixes and abrasive powders are bonded together with binding agent; Solidify then, varigrained magnetic abrasive powder is processed in mechanical disintegration, screening again.The magnetic abrasive of mull technique preparation owing to do not need briquet in advance, need not contain the equipment such as electric furnace, laser machine of inert gas, so this method technology is simple, realizes that easily cost is lower.But tissue looseness, in conjunction with poor, density is low, poor heat stability, abrasive particle comes off mutually easily, and the life-span is shorter.And when temperature was higher, the magnetic abrasive of bonding made the surface of processing become furvous, the easy contaminated damage of original finished surface.
The composite deposite method certain abrasive grain is mingled with in the coat of metal equably, and the special coating that forms is composite deposite with the method for composite plating or composite chemical plating.Compound plating technology is applied in the technology of preparing of magnetic abrasive, through years of development, the composite deposite method successfully is applied in many sciemtifec and technical spheres, but production cost is higher, batch process is difficult to realize, plating bath is dealt with improperly also and can be caused environmental pollution.
Its principle of reaction casting is under certain condition; Through the chemical reaction between element and element or element and the compound; Synthetic one or more high-intensity ceramic enhancement phase of original position in human body; After obtaining containing the alloy of ceramic enhancement phase, heat fused also under high pressure is blow molded into powder again.The problem that the reaction casting exists at present is that the content of ceramic hard abrasive material in the magnetic abrasive is low and hard abrasive grain wherein is also restive.
Plasma spraying method is after being pre-mixed iron-based powder and hard abrasive grain evenly by a certain percentage, to be placed in the material powder feed chamber of plasma spraying equipment.In the vacuum chamber of plasma spray injection device,, produce plasma jet flame by plasma generator to applying high-frequency discharge voltage between two electrodes.The mixed raw materials powder constantly is injected in the plasma torch simultaneously, and the plasma torch temperature can reach 5000～10000 ℃ high temperature, and material powder constantly is fused into little drop, cools off, is frozen into spherical magnetic abrasive particle then.Though this kind method has solved iron-based and the abrasive material problem of compatibility difference mutually; But the magnetic abrasive of this method preparation is owing to receive the high temperature action of plasma torch; The sharp cutting edge of abrasive particle phase is passivated; Cause its grinding efficiency significantly to reduce, its grainding capacity even the magnetic abrasive for preparing less than other straightforward procedures.
The fast magnetic abrasive preparation method (being proposed by the inventor) that coagulates of atomizing is to adopt the fast equipment that coagulates of atomizing, under the protection of inert gas; High pressure draught with containing the hard abrasive material blows the motlten metal flow of penetrating in the dirty process; After metal liquid stream is atomized, form the fine droplet that contains the hard abrasive grain, through quick cooled and solidified; The hard abrasive material of script compatibility and wetability extreme difference is forcibly combined with metal mutually mutually, thereby prepare high performance magnetic abrasive.This method has broken through the restriction of compatibility difference between ferromagnetic metal and the hard abrasive material; With ferromagnetic metal and the hard ceramic abrasive material is enforceable combines, prepare have the permeability height, grainding capacity is strong, controllable granularity, structural strength are high, structural form is high performance magnetic abrasive material spherical, that the life-span is long.This method promises to be the most promising method of producing the high performance magnetic abrasive material low-costly and in high volume at present.
Meal mixer is sent in pneumatic atomizing rapid condensation magnetic abrasive material provided by the present invention preparation, and the key device that magnetic abrasive prepares equipment is coagulated in the atomizing that realizes the inventor exactly and developed soon.
Summary of the invention
The object of the invention is to provide a kind of pneumatic atomizing rapid condensation magnetic abrasive material preparation to send meal mixer and send mixed powder control method.Adopt apparatus and method of the present invention, the imagination that can make pneumatic atomizing rapid condensation prepare magnetic abrasive is achieved, and gives the new function that the pneumatic atomizing rapid condensation device is given the preparation magnetic abrasive.
For realizing above-mentioned purpose, the application has adopted following technical scheme: meal mixer is sent in a kind of pneumatic atomizing rapid condensation magnetic abrasive material preparation, comprises dust feeder and mixed powder device.
Described dust feeder comprises: material control valve, air inlet, balance air inlet pipe, balanced valve, equalizing pressure table, storage tank, blowing valve, winding-up air inlet pipe, jetting pressure table, pipe cover, jet pressure valve, balanced valve, blowing valve, pipe cover, winding-up air gauge, equilibrium air pressure table and jet air gauge are formed;
Described mixed powder device comprises: high-pressure pipe, dust feeder, discharge nozzle, jet pressure valve, jet pressure table, mixed flow tube are formed.
The dust feeder of meal mixer is sent in described pneumatic atomizing rapid condensation magnetic abrasive material preparation, manages the pipeline section that extends to storage tank top in winding-up, and the deflector type spraying and blowing organ that is made up of winding-up pipe, pipe cover, spray orifice is set, and the bottom of pipe cover has a plurality of squit holes.This device had both guaranteed to spray the bottom entering storage tank of air-flow from storage tank, guaranteed that again the hard abrasive material can not flow into the ejection valve down;
The dust feeder of meal mixer is sent in described pneumatic atomizing rapid condensation magnetic abrasive material preparation, is provided with the hard abrasive material flow control mechanism of storage tank, blowing valve, balanced valve, winding-up air gauge, equilibrium air pressure table composition; It is mobile to prevent that the hard abrasive material from puing up a shed, blocking the hard abrasive material in storage tank, guarantees the accurate control of hard abrasive material flow;
The dust feeder of meal mixer is sent in described pneumatic atomizing rapid condensation magnetic abrasive material preparation; Blowing valve, balanced valve, jet pressure valve, winding-up air gauge, equilibrium air pressure table, jet pressure table are installed in the pipeline that does not contain the hard abrasive material in the high pressure draught that passes through, and prevent that the hard abrasive material from getting into these valves and Pressure gauge results in blockage, weares and teares and damages;
The dust feeder of meal mixer is sent in described pneumatic atomizing rapid condensation magnetic abrasive material preparation, and storage tank is as a kind of pressure vessel, and its design bearing pressure is not less than 10MPa;
The preparation of described pneumatic atomizing rapid condensation magnetic abrasive material send meal mixer, it is characterized in that: send the pressurized gas inlet of meal mixer and high-pressure air source to join, the outlet of sending meal mixer and atomizing soon with fixed attention the high-speed jet nozzle in the equipment spray chamber join;
The preparation of described pneumatic atomizing rapid condensation magnetic abrasive material send sending of meal mixer to mix the powder function, is that pure gas that provides through high-pressure air source and the pressure of controlling air-flow are realized, without any need for other power source.
Described pneumatic atomizing rapid condensation magnetic abrasive material preparation is sent meal mixer to send and is mixed the powder control method; Employing comprises the meal mixer that send of dust feeder and mixed powder device; Wherein dust feeder comprises material control valve, air inlet, balance air inlet pipe, balanced valve, equalizing pressure table, storage tank, blowing valve, winding-up air inlet pipe, jetting pressure table, pipe cover, jet pressure valve, balanced valve, blowing valve, pipe cover, winding-up air gauge, equilibrium air pressure table and jet air gauge composition, mixes the powder device and comprises: high-pressure pipe, dust feeder, discharge nozzle, jet pressure valve, jet pressure table, mixed flow tube are formed.Send the high-pressure pipe of meal mixer to be connected with high-pressure air source, the high-pressure spray nozzle of mixed flow tube and aerosolization chamber joins, and send mixed powder control method following:
Step 1, jet pressure valve, balanced valve, blowing valve, material control valve are placed closed condition;
Step 2, equalizing pressure are regulated: material control valve is regulated to maximum opening in (1); (2) observe the demonstration pressure of equilibrium air pressure table the adjustment valve opening time, adjustment air gauge pressure to 0.05～0.5MPa;
Step 3, jetting pressure are regulated: observe the barometric demonstration pressure of winding-up when regulating the blowing valve aperture, regulate the barometric pressure of winding-up to 3MPa;
Step 4, close material control valve;
Step 5, the can of hard abrasive material:, measure the hard abrasive material of prescribed volume by volume according to the design capacity of storage tank; The spiral cover on storage tank top is opened, adopted funnel to pour into the spiral cover of screwing then in the hard abrasive material that measures.
Step 6, adjusting mixed flow tube jet control debugging pressure: when observing the jet pressure meter pressure, regulate the aperture of jet pressure valve, adjusting pressure prepares the jet control debugging pressure of magnetic abrasive process stipulation soon with fixed attention to atomizing;
The flow of step 7, adjusting hard abrasive material: the aperture of regulating material control valve is to the process stipulation value.
Step 8, adjusting mixed flow tube jet controlled pressure: when observing the jet pressure meter pressure, regulate the aperture of jet pressure valve, regulate the jet controlled pressure of pressure to process stipulation.
Described pneumatic atomizing rapid condensation magnetic abrasive material preparation is sent meal mixer to send and mixed the powder control method, and it is characterized in that: the combination of described step 1, step 2 realizes: material control valve is regulated to maximum opening in (1); (2) observe the demonstration pressure of equilibrium air pressure table the adjustment valve opening time, adjustment air gauge pressure to 0.05～0.5MPa;
Described pneumatic atomizing rapid condensation magnetic abrasive material preparation is sent meal mixer to send and mixed the powder control method, it is characterized in that: the combination of described step 1, step 2, step 3 realizes the jetting pressure accent;
Described pneumatic atomizing rapid condensation magnetic abrasive material preparation is sent meal mixer to send and is mixed the powder control method, it is characterized in that: described step 1 and step 6 combination, can realize the adjusting of mixed flow tube jet control debugging pressure;
Described pneumatic atomizing rapid condensation magnetic abrasive material preparation is sent meal mixer to send and mixed the powder control method, it is characterized in that: described step 1, step 2, step 3, step 6, step 7 make up, and can realize the Flow-rate adjustment of hard abrasive material.
Described pneumatic atomizing rapid condensation magnetic abrasive material preparation is sent meal mixer to send and is mixed the powder control method, it is characterized in that: described step 6, step 7, step 8 combination, can realize the adjusting of mixed flow tube jet controlled pressure.
Pneumatic atomizing rapid condensation magnetic abrasive material preparation of the present invention is sent meal mixer and is sent and mix the powder control method; Owing to designed dust feeder, mixed the powder device; In dust feeder, designed the winding-up pipe-pipe deflector type spraying and blowing organ that cover-spray orifice constitutes, realized sending, mixing the dual-use function of powder and conveniently controlling hard abrasive material flow, jet expulsion pressure.Sending of device mixes the powder function, is to do power through the single high-pressure air source that provides to realize, need not increase any other power source.This device is connected in the gas circuit of pneumatic atomizing rapid condensation powder manufacturing apparatus; The magnetic abrasive that just can make the pneumatic atomizing rapid condensation powder manufacturing apparatus become a kind of uniqueness prepares equipment, and under the effect of sending meal mixer, the hard abrasive material fully mixes with gases at high pressure in the mixed flow pipeline; Form Dual-Phrase Distribution of Gas olid; Through the jet nozzle ejection of pneumatic atomizing rapid condensation equipment, the hard abrasive grain is shot in to just as bullet in the motlten metal flow that is about to atomizing, and metal liquid stream forms the fine droplet that contains the hard abrasive material through atomizing; Through quick cooled and solidified, just can obtain high performance magnetic abrasive.Pneumatic atomizing rapid condensation magnetic abrasive material preparation of the present invention is sent meal mixer and is sent and mix the powder control method, for realizing a kind of new magnetic abrasive preparation method essential condition is provided.
Description of drawings
Fig. 1 is that the pneumatic atomizing rapid condensation magnetic abrasive material preparation send meal mixer powder feeding and mixed powder device to divide sketch map;
Fig. 2 is that the meal mixer structural representation is sent in the pneumatic atomizing rapid condensation magnetic abrasive material preparation;
Fig. 3 is the A portion structure partial enlarged diagram of Fig. 2;
Fig. 4 is that the installation site sketch map of meal mixer in pneumatic atomizing rapid condensation equipment sent in pneumatic atomizing rapid condensation magnetic abrasive material preparation of the present invention.
The specific embodiment
Label among Fig. 1: C dust feeder; D mixes the powder device.
Label among Fig. 2: 14 storage tanks; 15 hard abrasive materials; 16 pipe covers; 17 pipe cover bottom spray orifices; 18 charge doors; 19 high-pressure pipes; 20 jet output interfaces; 21 blowing valves; 22 material control valves; 23 balanced valves; 24 jet pressure valves; 25 winding-up air gauges; 26 equilibrium air pressure tables; 27 jet air gauges; 28 winding-up pipes; 29 storage tank spiral covers; 30 mixed flow tubes; 31 sealing copper packings; 32 discharge nozzles; 33 jet pressure control tracheaes.
Label among Fig. 3: 14 storage tanks; 15 hard abrasive materials; 16 pipe covers; 17 pipe cover bottom spray orifices; 28 winding-up pipes.
Label among Fig. 4: 1 electric furnace; 2 motlten metals; 3 insulation crucibles; 4 let slip a remark; 5 spray chambers; 6 dust arresters of bleeding; 7 dedusters; 8 receive the powder container; 9 high pressure nitrogens; 10 cooling waters; 11 magnetic abrasives; 12 air-flows send meal mixer; 13 jet nozzles.
Referring to Fig. 1.Fig. 1 send the pneumatic atomizing rapid condensation magnetic abrasive material preparation of meal mixer first embodiment for the pneumatic atomizing rapid condensation magnetic abrasive material preparation and send meal mixer powder feeding and mixed powder device to divide sketch map.The preparation of present embodiment pneumatic atomizing rapid condensation magnetic abrasive material send meal mixer to comprise dust feeder C and mixed powder device D.
Referring to Fig. 2, cooperate referring to Fig. 1.Fig. 2 send the meal mixer structural representation for pneumatic atomizing rapid condensation magnetic abrasive material preparation of the present invention.Dust feeder C shown in Fig. 1 comprises in Fig. 2: storage tank 14, hard abrasive material 15, pipe cover 16, pipe cover bottom spray orifice 17; Charge door 18, high-pressure pipe 19, jet output interface 20, blowing valve 21, material control valve 22; Balanced valve 23, jet pressure valve 24, winding-up air gauge 25, equilibrium air pressure table 26, jet air gauge 27; Winding-up pipe 28, storage tank spiral cover 29, mixed flow tube 30, sealing copper packing 31 and jet pressure control tracheae 33.
High-pressure pipe 19 is connected with material control valve 22 through tee pipe coupling, and material control valve 22 joins through tee pipe coupling and blowing valve 28, jet pressure valve 24, and blowing valve 21 is connected with winding-up pipe 28.Winding-up pipe 28 is connected and extends to the epicoele position of storage tank 14 with storage tank 14, the winding-up pipe 28 between storage tank 14 bottoms and blowing valve 21, the connection air gauge 25 of jetting.Pipe cover 16 covers storage tank 14 inner winding-up pipes 28, and pipe cover 16 lower ends are welded on the bottom of storage tank 14 inner chambers.Pipe cover 16 bottom parts have a plurality of spray orifices.The top of storage tank 14 is charge doors 18, through spiral cover 29 and sealing copper packing 31 storage tank 14 is blocked.Air-flow in the winding-up pipe 28 is turned back after the inner upper end of arrival pipe cover 16, arrives pipe cover bottom spray orifice 17 through the gap between pipe cover 16 and the winding-up pipe 28, and spray orifice 17 ejections are sent the hard abrasive material into discharge nozzle 32 from pipe cover bottom.The outlet conduit of balanced valve 23 is installed equilibrium air pressure table 26, connects the epicoele of storage tank 14 then.Air-flow through balanced valve 23 gets into the epicoele position of storage tank 14, promotes hard abrasive material 15 and moves down, and avoids occurring the scaffolding phenomenon of hard abrasive material.
Referring to Fig. 2, cooperate referring to Fig. 1.Mixed powder device D in Fig. 1 comprises in Fig. 2: high-pressure pipe 19, discharge nozzle 32, jet pressure valve 24, jet pressure table 27, mixed flow tube 30.
High-pressure pipe 19 joins with the material control valve 9 of the dust feeder C of Fig. 3, joins through three-way connection and jet pressure valve 24 simultaneously.Jet pressure control tracheae 33 is equipped with jet air gauge 27, when jet pressure control tracheae 33 joins with jet pressure valve 24, joins with discharge nozzle 32, mixed flow tube 30.High pressure draught gets into mixed flow tube 30 through high-pressure pipe 19, jet pressure valve 24, jet pressure control tracheae 33 through three-way connection, and the hard abrasive material of in mixed flow tube 30, sending here with discharge nozzle 32 mixes, and forms the gas-solid dual-phase jet.
Referring to Fig. 3, cooperate referring to Fig. 2.Fig. 3 is the deflector type spraying and blowing organ among the dust feeder C, and this device is made up of the pipe 28 of jetting, pipe cover 16, spray orifice 17, and pipe cover 16 covers on the outside of winding-up pipe 28, and manages 28 coaxial lines with winding-up, and pipe cover 16 lower ends are welded on the bottom of storage tank 14.Pipe cover 16 lower end parts have a plurality of spray orifices.This device both can guarantee the bottom position ejection of air-flow from storage tank 14 inner chambers again so that the hard abrasive material in the storage tank 14 can not get into winding-up pipe 21.
Referring to Fig. 4, cooperate referring to Fig. 2.Fig. 4 is that the installation site sketch map of meal mixer in pneumatic atomizing rapid condensation equipment sent in pneumatic atomizing rapid condensation magnetic abrasive material preparation of the present invention.Fig. 4 has shown and has sent the installation site of meal mixer 12 in the pneumatic atomizing rapid condensation magnetic abrasive material preparation facilities.In Fig. 4, the high pressure draught of high-pressure air source send the inlet of meal mixer 12 to get into from air-flow, from the mixed powder air-flow that air-flow send the outlet of meal mixer 12 to flow out, the high-speed jet nozzle 13 in mixed flow tube 30 entering spray chambers 5.High pressure in the mixed flow tube 30 mixes the powder jet; Get into high-speed jet nozzle 13 back high velocity jet and go out; The hard abrasive grain is shot in in the motlten metal flow that is about to be atomized as bullet with high velocity air, and metal liquid stream forms the fine droplet that contains the hard abrasive material through atomizing; Through quick cooled and solidified, thereby form high performance magnetic abrasive.Gas in the high-pressure air source is generally nitrogen or the helium of pressure at 50～100MPa.
Claims (10)
1. meal mixer is sent in a pneumatic atomizing rapid condensation magnetic abrasive material preparation, it is characterized in that: comprise dust feeder and mixed powder device;
Described dust feeder comprises: material control valve, air inlet, balance air inlet pipe, balanced valve, equalizing pressure table, storage tank, blowing valve, winding-up air inlet pipe, jetting pressure table, pipe cover, jet pressure valve, balanced valve, blowing valve, pipe cover, winding-up air gauge, equilibrium air pressure table and jet air gauge;
Described mixed powder device comprises: high-pressure pipe, dust feeder, discharge nozzle, jet pressure valve, jet pressure table, mixed flow tube.
2. the dust feeder of meal mixer is sent in pneumatic atomizing rapid condensation magnetic abrasive material preparation according to claim 1; It is characterized in that: the pipeline section that extends to storage tank top at the winding-up pipe; Constituted the deflector type spraying and blowing organ by winding-up pipe, pipe cover, spray orifice, the bottom of pipe cover has a plurality of squit holes; This device had both guaranteed to spray the bottom entering storage tank of air-flow from storage tank, guaranteed that again the hard abrasive material can not flow into the ejection valve down.
3. the dust feeder of meal mixer is sent in pneumatic atomizing rapid condensation magnetic abrasive material according to claim 1 preparation, it is characterized in that: the hard abrasive material flow control mechanism of being made up of storage tank, blowing valve, balanced valve, winding-up air gauge, equilibrium air pressure table; It is mobile to prevent that the hard abrasive material from puing up a shed, blocking the hard abrasive material in storage tank, guarantees the accurate control of hard abrasive material flow.
4. the dust feeder of meal mixer is sent in pneumatic atomizing rapid condensation magnetic abrasive material preparation according to claim 1; It is characterized in that: blowing valve, balanced valve, jet pressure valve, winding-up air gauge, equilibrium air pressure table, jet pressure table are installed in the pipeline that does not contain the hard abrasive material in the high pressure draught that passes through, and prevent that the hard abrasive material from getting into these valves and Pressure gauge results in blockage, weares and teares and damages.
5. the dust feeder of meal mixer is sent in pneumatic atomizing rapid condensation magnetic abrasive material preparation according to claim 1, it is characterized in that: storage tank is as a kind of pressure vessel, and its design bearing pressure is not less than 10MPa.
6. the mixed powder device of meal mixer is sent in pneumatic atomizing rapid condensation magnetic abrasive material preparation according to claim 1; It is characterized in that: the jet pressure valve is connected with the material control valve of dust feeder; The jet pressure valve is connected with the preceding airflow line of mixed flow tube; Airflow line before the mixed flow tube is connected with the dust feeder outlet with mixed flow tube, and the high-pressure spray nozzle of mixed flow tube outlet and aerosolization chamber joins.
7. the meal mixer of meal mixer is sent in pneumatic atomizing rapid condensation magnetic abrasive material preparation according to claim 1; It is characterized in that: send the pressurized gas inlet of meal mixer and high-pressure air source to join, send the outlet of meal mixer and the fast high-speed jet nozzle that coagulates in the equipment spray chamber of atomizing to join.
8. pneumatic atomizing rapid condensation magnetic abrasive material according to claim 1 preparation send sending of meal mixer to mix the powder function, is that pure gas that provides through high-pressure air source and the pressure of controlling air-flow are realized, without any need for other power source.
9. a pneumatic atomizing rapid condensation magnetic abrasive material preparation is sent meal mixer to send and is mixed the powder control method; It is characterized in that: adopt the meal mixer that send that comprises dust feeder and mixed powder device; Wherein dust feeder comprises material control valve, air inlet, balance air inlet pipe, balanced valve, equalizing pressure table, storage tank, blowing valve, winding-up air inlet pipe, jetting pressure table, pipe cover, jet pressure valve, balanced valve, blowing valve, pipe cover, winding-up air gauge, equilibrium air pressure table and jet air gauge composition, mixes the powder device and comprises: high-pressure pipe, dust feeder, discharge nozzle, jet pressure valve, jet pressure table, mixed flow tube are formed; Send the high-pressure pipe of meal mixer to be connected with high-pressure air source, the high-pressure spray nozzle of mixed flow tube and aerosolization chamber joins, and send mixed powder control method following:
Step 1, jet pressure valve, balanced valve, blowing valve, material control valve are placed closed condition;
Step 2, equalizing pressure are regulated: material control valve is regulated to maximum opening in (1); (2) observe the demonstration pressure of equilibrium air pressure table the adjustment valve opening time, adjustment air gauge pressure to 0.05～0.5MPa;
Step 3, jetting pressure are regulated: observe the barometric demonstration pressure of winding-up when regulating the blowing valve aperture, regulate winding-up barometric pressure to 1～3MPa;
Step 4, close material control valve;
Step 5, the can of hard abrasive material:, measure the hard abrasive material of prescribed volume by volume according to the design capacity of storage tank; The spiral cover on storage tank top is opened, adopted funnel to pour into the spiral cover of screwing then in the hard abrasive material that measures;
Step 6, adjusting mixed flow tube jet control debugging pressure: when observing the jet pressure meter pressure, regulate the aperture of jet pressure valve, adjusting pressure prepares the jet control debugging pressure of magnetic abrasive process stipulation soon with fixed attention to atomizing;
The flow of step 7, adjusting hard abrasive material: the aperture of regulating material control valve is to the process stipulation value;
Step 8, adjusting mixed flow tube jet controlled pressure: when observing the jet pressure meter pressure, regulate the aperture of jet pressure valve, regulate the jet controlled pressure of pressure to process stipulation.
10. 9 described pneumatic atomizing rapid condensation magnetic abrasive material preparations are sent meal mixer to send and are mixed the powder control method according to right, and it is characterized in that: the combination of described step 1, step 2 realizes: material control valve is regulated to maximum opening in (1); (2) observe the demonstration pressure of equilibrium air pressure table the adjustment valve opening time, adjustment air gauge pressure to 0.05～0.5MPa;
The combination of described step 1, step 2, step 3 realizes the jetting pressure accent;
Described step 1 and step 6 combination can realize the adjusting of mixed flow tube jet control debugging pressure;
Described step 1, step 2, step 3, step 6, step 7 make up, and can realize the Flow-rate adjustment of hard abrasive material;
Described step 6, step 7, step 8 combination can realize the adjusting of mixed flow tube jet controlled pressure.
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| CN201110156047.3A CN102328091B (en) | 2011-06-11 | 2011-06-11 | Powder feeding and mixing device for preparing magnetic grinding material through atomization and rapid solidification and powder feeding and mixing method |
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| CN201110156047.3A CN102328091B (en) | 2011-06-11 | 2011-06-11 | Powder feeding and mixing device for preparing magnetic grinding material through atomization and rapid solidification and powder feeding and mixing method |
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| CN110000718A (en) * | 2019-03-20 | 2019-07-12 | 广东工业大学 | A kind of polishing preparation facilities and preparation method of composite particles |
| CN110523999A (en) * | 2019-09-05 | 2019-12-03 | 山东理工大学 | The oval wheeled high-voltage numerical control powder feeder of mixed powder pneumatic atomizing rapid condensation magnetic abrasive material preparation |
| CN114905045A (en) * | 2022-05-16 | 2022-08-16 | 哈尔滨工业大学 | Double-smelting furnace butt joint device for metal powder preparation |
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| CN108043524A (en) * | 2017-12-12 | 2018-05-18 | 广东海洋大学 | A kind of oscillatory type oyster shell powder crushing device |
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