CN101972994B - Soft abrasive grain flow generation and circulation system - Google Patents
Soft abrasive grain flow generation and circulation system Download PDFInfo
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- CN101972994B CN101972994B CN2010105228548A CN201010522854A CN101972994B CN 101972994 B CN101972994 B CN 101972994B CN 2010105228548 A CN2010105228548 A CN 2010105228548A CN 201010522854 A CN201010522854 A CN 201010522854A CN 101972994 B CN101972994 B CN 101972994B
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Abstract
The invention relates to a soft abrasive grain flow generation and circulation system comprising a soft abrasive grain flow generation device and a soft abrasive grain flow circulation storage device, wherein the soft abrasive grain flow generation device comprises abrasive grain hydraulic control equipment and transfer fluid generation equipment; the liquid carrier generation equipment comprises a high-speed jet pump and a liquid carrier storage tank; the high-speed jet pump is connected with the transfer fluid storage tank through a pipeline; the abrasive grain hydraulic control equipment comprises a hydraulic transmission shaft and an abrasive grain storage tank; the output port of the high-speed jet pump is connected with the output port of the abrasive grain storage tank to form the outlet of the soft abrasive grain flow generation device; the soft abrasive grain flow circulation storage device comprises a constraint module and an abrasive grain flow storage tank; the inlet of the constraint module is connected with the outlet of the soft abrasive grain flow generation device; a piezoelectric thin film sensor is arranged on the pipeline at the inlet of the constraint module; and the piezoelectric thin film sensor is connected with an abrasive grain hydraulic control module. The system effectively prevents the pump body from damaging and realizes the accurate control of the viscosity and the circulation processing of a soft abrasive grain flow.
Description
Technical field
The present invention is directed in soft abrasive stream precise finishing process technology; Owing to the ablation of solid particle the abrasive particle stream generating device is produced loss; And the problems such as control, output, circulation recovery that add soft abrasive stream in man-hour, design a kind of soft abrasive stream and take place and the circulatory system.
Background technology
The modern science and technology progress, industries such as aviation, electronics, computer improve constantly the technological requirement of Precision Machinery Elements, and the trend of spare and accessory parts miniaturization also continues to increase, and the measure of precision to workpiece also improves constantly thereupon.Traditional tool processes method that has can not satisfy the demand of making processing industry, and in order to break through the technical bottleneck of traditional precise finishing processing, the expert has proposed the fluid processing method both at home and abroad.Because the flow behavior of fluid " all-pervasive " can make fluid and finished surface form " seamless " and contact, so the fluid process technology has incomparable advantage in some specific processing occasions.Utilize little power micro cutting effect of soft abrasive stream, the no tool Precision Machining on implementation structureization surface.
In the process, generation, output, circulation, the recovery of soft abrasive stream, and the design of constraints module, installation etc. all are important steps.Be convenient narration, combine solid-liquid two phase abrasive Flow Machining technology here, set off a discussion with regard to the soft abrasive stream generation involved in the present invention and the enforcement background and the necessity of the circulatory system.
The essence of soft abrasive stream processing is to adopt high-molecular organic material as carrier; The abrasive particle that will have shear action suspends wherein; Form weak viscosity or inviscid abrasive Flow, the abrasive particle in the abrasive Flow is moved at surface to be machined, produce shear action and carry out polishing processing.Wherein soft abrasive stream is made up of carrier, additive and abrasive particle, is to be used for " flexibility " instrument that polishing processes.This technology has effectively remedied the patterned surface processing inferior position of traditional polishing processing method to fine dimension, the Surface Machining that also can process other complex parts simultaneously.
Summary of the invention
For overcome existing soft abrasive flow generating apparatus easily to the pump housing cause damage, the viscosity Control low precision, can't realize the deficiency of cyclic process, the present invention provide a kind of and effectively prevent pump housing infringement, realize to soft abrasive stream viscosity accurate control, realize that the soft abrasive stream of cyclic process takes place and the circulatory system.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of soft abrasive stream takes place and the circulatory system, comprises soft abrasive flow generating apparatus and soft abrasive stream circulation storage device, and said soft abrasive flow generating apparatus comprises abrasive particle hydraulic-pressure control apparatus and carrying object generation equipment; Said carrying object generation equipment is made up of high-speed jet pump and carrying object storage bin, is linked to each other by pipeline between high-speed jet pump and the carrying object storage bin; Said abrasive particle hydraulic-pressure control apparatus is made up of hydraulic drive axle and abrasive particle storage bin; The end of said hydraulic drive axle is connected with piston; Said piston seals movably and is installed in the said abrasive particle storage bin; The abrasive particle storage bin of piston one side is a hydraulic fluid chamber, and the abrasive particle storage bin of piston opposite side is the abrasive particle chamber, the output shaft interlock of said hydraulic drive axle and motor; The delivery outlet of said high-speed jet pump links to each other with the delivery outlet of abrasive particle storage bin and forms the outlet of soft abrasive flow generating apparatus; Said soft abrasive stream circulation storage device comprises constraints module and abrasive Flow storage bin; The built-in workpiece to be machined of said constraints module; The inlet of constraints module links to each other with the outlet of said one-tenth soft abrasive flow generating apparatus, and the outlet of said constraints module links to each other with the inlet of said abrasive Flow storage bin, and the middle part of said abrasive Flow storage bin is provided with screen pack; The abrasive Flow storage bin of one side of said screen pack is provided with the inlet and first outlet; The abrasive Flow storage bin of opposite side is provided with second outlet, and said second outlet links to each other with the input port of high-speed jet pump, and said first outlet links to each other with said carrying object storage bin;
On the pipeline of said constraints module import department, install in order to detect the piezoelectric film sensor of the pressure that is produced when abrasive Flow is impacted sensor in the runner; Said piezoelectric film sensor with in order to the linear relationship of setting pressure threshold value and pressure and motor power output; When the detected force value of sensor exceeds pressure threshold, reduce the motor power output, when the detected force value of sensor is lower than pressure threshold, increase the abrasive particle hydraulic control module of motor power output.
Further, said piezoelectric film sensor adopts poly meta fluoroethylene piezoelectric film as its sensing element.
Further again, the output of said piezoelectric film sensor connects filter circuit, and said filter circuit comprises analog filtering and digital filtering, and said analog filtering adopts the fertile thatch wave filter of second order Bart, and said digital filtering adopts the singular value decomposition bandpass filter.
Further, said filter circuit connect in order to will pass through filtered signal amplitude equal proportion be limited to embedded dsp the amplitude limit modulate circuit within the receptible scope.
Said amplitude limit modulate circuit connects in order to the signal after the amplitude limit is converted into the analog-to-digital conversion modulate circuit of the data signal that embedded dsp can discern.
Said abrasive particle hydraulic-pressure control apparatus and carrying object generation equipment are parallel to be placed.
Technical conceive of the present invention is: the present invention is primarily aimed in soft abrasive stream and how produces, and after to workpiece processing the problem of cycling and reutilization and proposing how.Because soft abrasive stream need possess higher speed and bigger pressure when getting into constraints module, could realize the turbulent flow form, so need the stream of the soft abrasive in the storage bin be injected in the constraints module with water pump.And all kinds of water pump majorities that possess high speed and high pressure output can not spray the liquid (like abrasive Flow) that has impurity, and this has just proposed certain requirement to the generation of soft abrasive stream; Meanwhile, in order to satisfy the condition of work of water pump, certainly will need abrasive particle be separated with carrying object and deposit, the circulation recovery that institute thinks soft abrasive stream also utilization has caused difficulty.
Therefore; The present invention adopts high-speed jet pump and abrasive particle hydraulic-pressure control apparatus respectively carrying object in the abrasive Flow and solid particle to be taken place; Before getting into constraints module, it is mixed, the abrasive Flow that can effectively avoid having grinding capacity like this causes damage to water pump; Constitute feedback control system through the embedded dsp control chip, can control abrasive Flow solid phase volume fraction at any time, thereby realize adjustment, finally make the working (machining) efficiency that reaches best abrasive Flow viscosity; In addition to carrying out in the abrasive Flow storage bin separating of abrasive particle and carrying object, the problem of when having solved the abrasive Flow cyclic process abrasive particle and carrying object having been separated charging and collection.
Silicon-carbide particle and fluid are left in the abrasive Flow storage bin, and storage bin comprises an inlet and two outlets, and two outlets are respectively as the inlet of high-speed jet pump and abrasive particle hydraulic means.Screen pack is equipped with in one of them outlet of storage bin (high-speed jet pump intake place), its objective is to prevent that the solid particle that jet pump work the time will be deposited in the storage bin bottom from bringing in the pump.During system works, the fluid in the abrasive Flow storage bin penetrates with higher speed through the high-speed jet pump, and the abrasive particle hydraulic means will penetrate at the abrasive particle in the abrasive particle storage bin through hydraulic, and fluid mixes before getting into constraints module with abrasive particle.Power through the control hydraulic means can be controlled abrasive particle ejaculation amount, thereby reaches the purpose of control soft abrasive stream solid phase volume fraction.Abrasive Flow is carried out the grinding of little power trace to workpiece after getting into constraints module; The abrasive Flow of accomplishing after processing is got in the abrasive Flow storage bin by the constraints module outlet; Do not install agitating device in the storage bin additional, in fluid, at the bottom of natural sedimentation to the case, wait for the operation work of following one-period by abrasive particle.The native system structure chart is seen Fig. 1.
The design of abrasive particle hydraulic control device as follows among the present invention: piezoelectric film sensor is installed in the constraints module porch;, abrasive Flow can produce the pressure effect when getting into constraints module to piezoelectric film sensor; Piezoelectric film sensor produces electric pressure signal; This signal being carried out conditioning backs such as digital filtering (singular value decomposition bandpass filtering method), amplitude limit conditioning (the amplitude upper limit being arranged because get into the signal of embedded dsp), analog-to-digital conversion gets in the embedded dsp; Embedded dsp is converted into the control signal of controlling hydraulic electric motor power through after the calculation process with initial pressure signal, and hydraulic electric motor is carried out power adjusting; Thereby the output quantity of adjustment solid abrasive particles, the final purpose that realizes adjustment abrasive Flow solid particle volume fraction.The control system schematic is seen Fig. 4.
Beneficial effect of the present invention is:
(1) adopts carrying object and abrasive particle independence producing method, can get in the high-speed jet pump, cause the pump housing to damage effectively preventing solid particle;
(2) utilize the embedded dsp feedback control system that the abrasive particle hydraulic means is controlled; Can dispose the volume fraction of solid particle in the soft abrasive stream as required; Thereby realize control, to reach best processing effect to soft abrasive stream viscosity;
(3) through the abrasive Flow storage bin is carried out the method for designing that carrying object separates with abrasive particle, can accomplish the work of soft abrasive stream cyclic process, play the effect of energy-conserving and environment-protective.
Description of drawings
Fig. 1 is an overall system structure sketch map of the present invention.
Fig. 2 is an abrasive Flow storage bin sketch map of the present invention.
Fig. 3 is an abrasive Flow generating means sketch map of the present invention.
Fig. 4 is an abrasive particle hydraulic control device control sketch map of the present invention.
Fig. 5 is an abrasive particle hydraulic control device control flow chart of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, the circulatory system takes place in a kind of soft abrasive stream, it is characterized in that: comprise soft abrasive stream circulation storage device 1 and soft abrasive flow generating apparatus 3; Said soft abrasive stream circulation storage device 1 is made up of soft abrasive stream storage box 11 and connecting line 2; Said soft abrasive flow generating apparatus 3 is made up of carrying object generation equipment 31 and abrasive particle hydraulic-pressure control apparatus 32; Link to each other with pipeline 14,15 between soft abrasive streaming storage device 1 and the generating means 3.
Said soft abrasive flow generating apparatus 3 comprises carrying object generation equipment 31 and abrasive particle hydraulic-pressure control apparatus 32; Said carrying object generation equipment 31 is made up of high-speed jet pump 314 and carrying object storage bin, is linked to each other by pipeline 15 between high-speed jet pump 314 and the carrying object storage bin; Said abrasive particle hydraulic-pressure control apparatus 32 is by abrasive particle storage bin 321, and hydraulic drive axle 322 is formed with motor 323; Said abrasive particle hydraulic-pressure control apparatus 32 and carrying object generation equipment 31 parallel placements; The delivery outlet 313 of said carrying object generation equipment 31 links to each other with abrasive particle hydraulic-pressure control apparatus delivery outlet 324, by high-speed jet pump 314 carrying object 311 is penetrated to the abrasive particle outlet, makes carrying object 311 and abrasive particle 325 be mixed into certain density soft abrasive stream 312.
Described abrasive particle hydraulic-pressure control apparatus 32, said abrasive particle hydraulic-pressure control apparatus 32 extrudes solid abrasive particles through motor 323 control hydraulic drive axles 322 from soft abrasive stream storage bin 11, be mixed into certain density soft abrasive stream 312 with carrying object 311.
The end of said hydraulic drive axle 322 is connected with piston, and said piston seals movably and is installed in the said abrasive particle storage bin 11, and the abrasive particle storage bin 11 of piston one side is a hydraulic fluid chamber, and the abrasive particle storage bin 11 of piston opposite side is the abrasive particle chamber,
Described abrasive particle hydraulic electric motor is controlled system 32, and said abrasive particle hydraulic electric motor is controlled system 32 and adopted embedded dsps 326 to carry out FEEDBACK CONTROL, and said feedback signal is from the piezoelectric film sensor 328 of constraints module 4 import departments.
Described piezoelectric film sensor 328; Said piezoelectric film sensor 328 adopts poly meta fluoroethylene piezoelectric film as its sensing element; Said poly meta fluoroethylene piezoelectric film is a kind of macromolecule sensing material of uniqueness, can be to the variation output correspondent voltage signal of pressure; The pressure 327 that the input signal that said piezoelectric film sensor is gathered is produced when impacting from 312 pairs of sensors of abrasive Flow in the runner 328; The output signal of said piezoelectric film sensor 328 gets in the embedded dsp 326 through conditionings such as filtering, amplitude limit, analog-to-digital conversion back and carries out the FEEDBACK CONTROL computing.
Described filtering conditioning process, said filtering conditioning process comprises analog filtering and digital filtering, and said analog filtering adopts the fertile thatch wave filter of second order Bart, and it mainly acts on and is the burr in the sampled signal, clutter are filtered; Said digital filtering adopts singular value decomposition bandpass filtering method, and it mainly acts on is that rub-out signal with being sampled in the data signal is handled, and obtains the optimum sampling value of participating in calculating; Said amplitude limit conditioning process, it mainly acts on and is the filtered signal amplitude equal proportion of process is limited within 326 receptible scopes of embedded dsp, in case embedded dsp 326 is caused damage; Said analog-to-digital conversion conditioning can be adopted to carry the realization of A/D converting unit in the embedded dsp 326, and the signal after the amplitude limit is converted into the data signal that embedded dsp can be discerned.
Described embedded dsp feedback control system; Said embedded dsp 326 feedback control systems adopt the negative-feedback proportion control, when the detected force value of sensor is excessive, explain that abrasive Flow viscosity is too high; Abrasive particle content is bigger; Can control hydraulic electric motor 323 power outputs through the mode of online adjustment, thereby reduce the abrasive particle output quantity, reach the purpose that reduces abrasive Flow viscosity; Cross when abrasive Flow viscosity and in like manner can get when low.
Described soft abrasive stream circulation storage device 1, said soft abrasive stream circulation storage device 1 is made up of constraints module 4, pipeline 5 and soft abrasive stream storage bin 11.Said constraints module 4 built-in workpieces to be machined, constraints module 4 inlets link to each other with 3 outlets of soft abrasive flow generating apparatus, and constraints module 4 outlets link to each other with soft abrasive stream storage bin 11.
Described soft abrasive stream storage bin 11; Said abrasive Flow storage bin 11 is by 2 and two outlets 14 of an inlet; 15 form, and a said inlet 2 links to each other through pipeline with constraints module 4 outlets, and the soft abrasive stream 12 of accomplishing processing is got in the abrasive Flow storage bin 11; Said two outlets 14,15 are respectively as the inlet of abrasive particle hydraulic control device in the soft abrasive flow generating apparatus 3 32 and carrying object generation equipment 31.
Said abrasive Flow storage bin 11 built-in screen packs 16, said screen pack 16 is separated an outlet (high-speed jet pump intake) in the abrasive Flow storage bin 15 and abrasive particle 13, in order to guarantee to get into the degree of purity of fluid in the high-speed jet pump 314.Concrete structure is: the middle part of said abrasive Flow storage bin is provided with screen pack 16; The abrasive Flow storage bin of one side of said screen pack 26 is provided with the inlet and first outlet; The abrasive Flow storage bin of opposite side is provided with second outlet; Said second outlet links to each other with the input port of high-speed jet pump, and said first outlet links to each other with said carrying object storage bin
The present invention can be used for adopting soft abrasive stream that the patterned surface of fine dimension mould is processed, and the solid-liquid two phase soft abrasives that can be recycled stream is provided.The embedded dsp control chip adopts TMS320LF2407 DSP control chip among the present invention, and this chip has stronger digital signal processing capability, can handle the data of being sampled rapidly.Piezoelectric film sensor adopts Kynoar (PVDF) piezoelectric film sensor among the present invention, and this sensor has higher sensitivity to the minute-pressure force signal.
The course of work of the present invention is: silicon-carbide particle 13 and fluid 311 are left in the abrasive Flow storage bin 11; Storage bin 11 comprises 1 and two outlet 14 of an inlet; 15, two outlets 14,15 are respectively as the inlet of high-speed jet pump 314 and abrasive particle hydraulic means 32.Screen pack is equipped with in one of them outlet of storage bin 11 (high-speed jet pump intake place) 15, its objective is that the solid particle 13 that will be deposited in storage bin 11 bottoms when preventing jet pump 314 work brings in the pump.During system works; Fluid in the abrasive Flow storage bin 11 penetrates with higher speed through high-speed jet pump 314; Abrasive particle hydraulic means 32 will penetrate at the abrasive particle in the abrasive particle storage bin 11 13 through hydraulic, and fluid 311 mixes before getting into constraints module 4 with abrasive particle 13.Piezoelectric film sensor 328 is installed in constraints module 4 porch; When getting into constraints module 4, back abrasive Flow 312 can produce the pressure effect when mixing to piezoelectric film sensor 328; Piezoelectric film sensor produces electric pressure signal 327; This signal being carried out conditioning backs such as digital filtering (singular value filtering), amplitude limit conditioning (the amplitude upper limit being arranged because get into the signal of embedded dsp), analog-to-digital conversion gets in the embedded dsp 326; Embedded dsp 326 is converted into the control signal of controlling hydraulic electric motor power through after the calculation process with initial pressure signal 327, and hydraulic electric motor 323 is carried out power adjusting; Thereby the output quantity of adjustment solid abrasive particles finally reaches the purpose of adjusting abrasive Flow solid particle volume fraction.Abrasive Flow 312 gets into little power trace is carried out in constraints module 4 backs to workpiece grinding; The abrasive Flow of accomplishing after processing 12 is got in the abrasive Flow storage bins 11 by constraints module export pipeline 5; Do not install agitating device additional in the storage bin 11; In fluid, at the bottom of natural sedimentation to the case, wait for the operation work of following one-period by abrasive particle 13.
The said content of this specification embodiment only is that the part of inventive concept institute way of realization is enumerated; Protection scope of the present invention should only not be confined to the concrete form that instance is stated, protection scope of the present invention reaches in those skilled in the art according to the thinkable equivalent technologies means of technical conceive of the present invention.
Claims (6)
1. a soft abrasive stream takes place and the circulatory system, it is characterized in that: comprise soft abrasive flow generating apparatus and soft abrasive stream circulation storage device, said soft abrasive flow generating apparatus comprises abrasive particle hydraulic-pressure control apparatus and carrying object generation equipment; Said carrying object generation equipment is made up of high-speed jet pump and carrying object storage bin, is linked to each other by pipeline between high-speed jet pump and the carrying object storage bin; Said abrasive particle hydraulic-pressure control apparatus is made up of hydraulic drive axle and abrasive particle storage bin; The end of said hydraulic drive axle is connected with piston; Said piston seals movably and is installed in the said abrasive particle storage bin; The abrasive particle storage bin of piston one side is a hydraulic fluid chamber, and the abrasive particle storage bin of piston opposite side is the abrasive particle chamber, the output shaft interlock of said hydraulic drive axle and motor; The delivery outlet of said high-speed jet pump links to each other with the delivery outlet of abrasive particle storage bin and forms the outlet of soft abrasive flow generating apparatus; Said soft abrasive stream circulation storage device comprises constraints module and abrasive Flow storage bin; The built-in workpiece to be machined of said constraints module; The inlet of constraints module links to each other with the outlet of said soft abrasive flow generating apparatus, and the outlet of said constraints module links to each other with the inlet of said abrasive Flow storage bin, and the middle part of said abrasive Flow storage bin is provided with screen pack; The abrasive Flow storage bin of one side of said screen pack is provided with the inlet and first outlet; The abrasive Flow storage bin of opposite side is provided with second outlet, and said second outlet links to each other with the input port of high-speed jet pump, and said first outlet links to each other with said carrying object storage bin;
On the pipeline of said constraints module import department, install in order to detect the piezoelectric film sensor of the pressure that is produced when abrasive Flow is impacted sensor in the runner; Said piezoelectric film sensor is connected with the abrasive particle hydraulic control module; Said abrasive particle hydraulic control module is in order to the linear relationship of setting pressure threshold value and pressure and motor power output; When the detected force value of sensor exceeds pressure threshold, reduce the motor power output, when the detected force value of sensor is lower than pressure threshold, increase the motor power output.
2. soft abrasive stream as claimed in claim 1 takes place and the circulatory system, it is characterized in that: said piezoelectric film sensor adopts poly meta fluoroethylene piezoelectric film as its sensing element.
3. according to claim 1 or claim 2 soft abrasive stream takes place and the circulatory system; It is characterized in that: the output of said piezoelectric film sensor connects filter circuit; Said filter circuit comprises analog filtering and digital filtering; Said analog filtering adopts the fertile thatch wave filter of second order Bart, and said digital filtering adopts the singular value decomposition bandpass filter.
4. soft abrasive as claimed in claim 3 stream takes place and the circulatory system, it is characterized in that: said filter circuit connect in order to will pass through filtered signal amplitude equal proportion be limited to embedded dsp the amplitude limit modulate circuit within the receptible scope.
5. soft abrasive as claimed in claim 4 stream takes place and the circulatory system, it is characterized in that: said amplitude limit modulate circuit connects in order to the signal after the amplitude limit is converted into the analog-to-digital conversion modulate circuit of the data signal that embedded dsp can discern.
6. according to claim 1 or claim 2 soft abrasive stream takes place and the circulatory system, it is characterized in that: the parallel placement of said abrasive particle hydraulic-pressure control apparatus and carrying object generation equipment.
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| CN2010105228548A CN101972994B (en) | 2010-10-28 | 2010-10-28 | Soft abrasive grain flow generation and circulation system |
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| CN102152240A (en) * | 2011-02-21 | 2011-08-17 | 浙江工业大学 | Novel method and special device for precisely processing titanium alloy joint prosthesis by curved-surface turbulence |
| CN103921217B (en) * | 2014-05-04 | 2016-05-11 | 长春理工大学 | The online temperature correction-compensation method of abrasive Flow Machining |
| CN104690650B (en) * | 2015-02-13 | 2017-01-25 | 浙江工业大学 | Experimental test method for optimization selection of artificial joint profiling polishing processing |
| CN109397105A (en) * | 2018-12-27 | 2019-03-01 | 深圳市富泰和精密制造股份有限公司 | A kind of abrasive Flow deburring equipment |
| CN109590891B (en) * | 2018-12-28 | 2023-09-26 | 浙江工业大学 | Efficient centrifugal pump volute polishing device |
| CN109664202B (en) * | 2018-12-28 | 2023-09-26 | 浙江工业大学 | Centrifugal pump spiral case burnishing device |
| CN112223123A (en) * | 2020-10-13 | 2021-01-15 | 金华连云信息技术有限公司 | Intelligent metal surface treatment device capable of automatically controlling sand blasting force |
| CN115056130A (en) * | 2022-08-19 | 2022-09-16 | 新沂市佳昌电子有限公司 | Spare part grinding device is used in miniature transformer production |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6299510B1 (en) * | 1998-04-28 | 2001-10-09 | Flow International Corporation | Abrasive removal system for use with high-pressure fluid-jet cutting device |
| CN2737500Y (en) * | 2003-03-07 | 2005-11-02 | 上海理工大学 | Underwater high-confining pressure post-mixing abrasive jet-flow analogue experimental apparatus |
| US7934977B2 (en) * | 2007-03-09 | 2011-05-03 | Flow International Corporation | Fluid system and method for thin kerf cutting and in-situ recycling |
| CN101791787B (en) * | 2010-03-11 | 2011-08-10 | 浙江工业大学 | Automatic stirring system for soft abrasive particle fluids |
| CN201881274U (en) * | 2010-10-28 | 2011-06-29 | 浙江工业大学 | Flexible abrasive particle fluid generating and circulating system |
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