The research current situation of technology of polish of abrasive water efflux

Efflux of water of abrasive of 　 of 1 foreword 　 is from 19 centuries 80 time develop a kind of when rise new technology quickly, compare with photograph of traditional processing technique, when it has treatment, wear away without the tool, the influence that do not have heat, counterforce small, treatment is flexible and advanced advantage, already was applied extensively to a variety of treatment industries at present, use at processing a variety of data such as pottery and porcelain, quartz, composite material. Technology of polish of abrasive water efflux is the collect that rises in the development on the foundation of processing technique of abrasive water efflux technology of hydromechanical, surface a kind of at an organic whole new-style and accurate processing technique. Current, still compare domestic and internationally to its research little, only a few scholar undertook the experiment studies exploring a gender, have not form research achievement of the system. Hashish undertook exploring sexual experiment to the feasibility of film of diamond of polish of abrasive liquid efflux, pass experimental discovery, it is OK to use abrasive of 600 purposes SiC go to diamond film from polish of 3 μ M 1.

3 μ M. Fahnle, when the person such as Oliver W uses plate glass of polish of liquid abrasive efflux, vitreous surface surface roughness reduces 5nm from initiative 475nm. Booij, Silvia M.

Wait for a person to be in process of glass of polish of abrasive liquid efflux, through adjusting main craft parameter (if dimension of chroma of handling time, abrasive, abrasive and target are apart from,wait) , discover material purify speed is controlled likely inside 1nm/min limits. Booij, Silvia M.

With Fanle, Oliver W.

Wait for a person to pass experimental discovery, in process of polish of abrasive liquid efflux, through adjusting the athletic contrail of nozzle, what can get face form precision is N10 is planar. Messelink, Wilhelmus A.

C.

M.

Use experimental test and verify abrasive liquid efflux can is opposite spherical undertake beforehand polishing and polishing treatment, its study the result makes clear: In polishing process, material purify speed depends on the size of the sharp degree of abrasive and its kinetic energy. Yang Qianhua and the person such as Liu Jiguang pass an experiment to consider, thinking to grind fluid efflux is feasible to the grinding polish of surface of ferroalloy different music, reached relatively sound polishing plan. When efflux of water of abrasive of 　 of 　 of mechanism of polish of efflux of 2 abrasive water pounds polishing workpiece with proper point of view, abrasive is dissoluble to the wallop of workpiece for horizontal component of force and perpendicular component of force. Horizontal component of force arises to the protruding peak on workpiece cut protruding to make smooth action, perpendicular component of force produces extruding to working surface, make workpiece surface produces cold hard effect. Polishing initial stage, the sunken cereal place of workpiece surface can stop mixed liquor of efflux of water of one part abrasive, form a film. Dew buy is in the protruding peak outside film, can get first of abrasive pound action and be dropped by purify, make working surface gets apparent level. Normally exterior surface roughness is micron class, this one process is called normally one class polish (namely thick polish) . The process is here medium, the purify amount of material is larger, need to choose the abrasive with bigger grain, mechanism of its material purify is thought with common abrasive water efflux machines mechanism likeness at present. In process of polish of abrasive water efflux, the mechanism of material of surface of abrasive purify workpiece basically has two kinds, plasticity is out of shape a kind the mechanism is caused, abrasive makes to the concussion of workpiece surface material to two side apophysis, this kind of process can not cause the cutting process of material directly, but material generation falls off and form 2 times below the action that wears bead subsequently cut bits. In the meantime, there is cutting process like grinding bead to also be cut like dig to workpiece surface, this process but direct purify material, form cut bits. Another kind is to use mix the polishing liquid that has abrasive particle to be pounded to the collision of workpiece, cut score action to come purify material. After thick polish, workpiece apparently leave lesser protruding peak only, at this moment the level pounds component of force to reduce, perpendicular concussion component of force increases, make abrasive right the extruding action of working surface increased, this one process is called normally 2 class polish, namely polish of essence of life. In this one process, material purify amount is very small, need to choose fine grained abrasive. The purify mechanism of material of this one phase still is in research phase up to now. The scholar thinks, when material purify measure is accept rice level, because purify deepness is less than his critical cutting deepness, at this moment the main way that plasticity flows to become material purify, the abrasive of accept rice measure basically is extruding grinding action to the action of workpiece. The influence 　 　 to polishing effect uses 3 craft parameter when abrasive water efflux undertakes polishing is machined, treatment quality gets the influence of a lot of element, for example: Efflux pressure, efflux nozzle diameter, target is apart from, obliquitous, the diameter of arenaceous spray pipe, appearance and length, effect time, the discharge that wears bead, size, appearance and hardness and be waited for by the property of treatment material. (1) when spraying pressure is too great, material purify amount is larger, polishing effect is not ideal; Spraying pressure is too little, material hard purify, effect of short of polish. So spraying pressure should be optimized according to the property of material and hardness choose. (2) abrasive size is larger to polishing effect impact, abrasive size is smaller, polishing quality is better, but polishing efficiency Yi Yue is low. (3) abrasive hardness has apparent effect to polishing effect. In treatment of common abrasive water efflux, think the hardness of abrasive wants to compare workpiece hardness normally tall, ability undertakes machining to workpiece. But man-hour is added in polish of essence of abrasive water efflux, the treatment mechanism that differs as a result of its and the high demand to treatment surface quality, the deflection of abrasive oneself is bigger, namely abrasive hardness is smaller, polishing effect is better. (4) handling time is not apparent to polishing effect impact, bigger to impact of material purify volume, handling time is longer, material purify is more. (5) target is apart from best to the influence existence of polishing effect limits extraction a cost. Target is apart from a choice too small, if choose in efflux initiative paragraph inside when undertaking polishing, material purify rate is high, but weaker to the polishing action of workpiece. Target is apart from a choice too big, if choose in efflux abreaction paragraph inside when undertaking polishing is machined, material does not have purify basically, same polish result is bad. Think normally when polishing, the choice that target is apart from should make efflux is in basic paragraph of polishing workpiece. (6) eject dip has optimal value concern to polishing effect. When workpiece of polish of abrasive water efflux, reduce obliquitously as eject, polishing effect is better and better, when reducing fixed cost, polishing surface quality is achieved best, when eject dip is reduced further, exterior quality change is not big, but material purify quantity can be reduced obliquitously as eject smaller and smaller. If eject inclination is too little (the directional polish workpiece that is like efflux edge and workpiece surface parallel) , at this moment material purify quantity does not have purify too small or basically, polishing effect is not ideal instead. (7) the diameter of arenaceous spray pipe, appearance and length influence abrasive are in efflux bundle medium distributinging circumstance. When polishing, ideal abrasive distributings is abrasive in efflux Shu Zhongjun divide evenly distributings. (8) fall in same polishing condition, material hardness is taller, exterior surface roughness is lower, material purify amount is smaller. The treatment of polish of abrasive water efflux with the good 　 of 4 main problem 　 that at present technology of polish of abrasive water efflux exists is material purify as a result the amount is small, exterior quality is high. Be like the polishing result of conceivable ideal, need to choose pressure the abrasive water efflux with small size of low, abrasive, namely efflux of small abrasive water. But the theory of efflux of small abrasive water is at present immature still, the following and main problem remains to solve: (1) the formation of efflux of imperceptible abrasive water. Common abrasive water efflux is formed is to use the effect in Wen Du to bring shoot, make abrasive enters water efflux, but Miller discovery, when efflux diameter is less than 300 μ M, this kind of means that makes abrasive enters water efflux already cannot apply. The research that manages to blender of efflux of small abrasive water now returns scarce report. (2) abrasive reunites. When abrasive grain is accept rice class, the surface of abrasive can be very big, the process is fashioned in abrasive water efflux in, abrasive grain has reunite trend. When polish of essence of abrasive water efflux is machined, need uses the abrasive of accept rice class, and the dispersive problem to abrasive of class of rice of the accept in abrasive water efflux still is done not have at present solve. (3) nozzle happens to jam when imperceptible abrasive is machined. Because dimension of nozzle of efflux of imperceptible abrasive water is lesser, in the process of efflux switch, jam extremely easily. Some scholars use a powerful person to control abrasive to enter the time of nozzle, but at the same time, of a powerful person wear away quickly destroy become a new issue again. (4) because the research to technology of polish of abrasive water efflux just was in,start level, still do not have the polishing craft that forms maturity, theory to theory from the experiment. When polish of essence of abrasive water efflux is machined, material purify mechanism is microcosmic purify mechanism, the microcosmic purify mechanism of all sorts of material still does not have final conclusion up to now. (5) polish of abrasive water efflux is machined (especially when polish of essence of life is machined) , chosen abrasive size is very small, and nozzle dimension because the reason of economy and technology, accomplish very hard very small. At this moment, because nozzle dimension and abrasive dimension are compared very big and the dimension effect that cause, among them rule still is not clear about. The place on put together is narrated, can see the research to technology of polish of abrasive water efflux still is in primary level, will answer henceforth from academic, experiment two face technology of polish of abrasive water efflux to undertake further development studies. The progress of 　 of 5 epilogue 　 as science and technology, development gives more and more new-style data, taller and taller also to the treatment precision requirement of material. Processing technique of abrasive water efflux serves as a kind of new-style accurate processing technique, its have some distinct advantages, make its can be in all sorts of difficult treatment produce effect in the treatment of material, especially small abrasive water the development of fluidics, the maturity of the research to technology of polish of abrasive water efflux and craft will rise to urge action. CNC Milling