The Electrochemical Deburring Equipment Design Research For Valve Hole And Inner Cross Hole Of Hydraulic Cylinder Eye

Hydraulic, pneumatic valve body goes up have a lot of intersect hole. In with valve core goes well with to suit in hole, often need Tang some recesses ( such as the valve body of pilot valve ). In these burrs that position forms are in element inside, exclude comparison with general method difficulty. And these burrs are the technology pollution source of a kind of danger, it can influence the entire hydraulic systematic reliability and life or that starts system. To raise the quality of hydraulic, pneumatic valve body, needs adopt effective go burr technology. Electrochemistry goes burr technology for exclude this kind of burr to have great advantage. Clearing burr technology is the important component of valve body element smooth whole processing, is also the last process of finish machining of valve body element, its development level directly concerns performance and the quality of product, as well as price and the cost of product. Abroad, have treated burr problem from strategic altitude from the angle of systematic project , have put forward " burr project". Clearing normally burr process can make the manufacturing costs of valve body element increase 10%-20% Now, adopt the handworks such as scraper, oilstone, gauze and brush ship of steel wire , mechanical way goes burr, it is time-consuming to take a lot of work , labour intensity is hit and pollutes environment, is inconsistent with the requirement of green product, and can only rely on the feeling of visual examination to operate , go burr quality is hard guarantee. It makes current pass through electrolyte solution that electrolysis is when overcast positive the two poles arouse the process of oxidize reduction reaction. Electrolysis substance is for electrolyte solution ( or melt form electrolyte ) starts eclectricity , the cation that electron flows in electrolyteand the negative pole of electrolysis pool from the negative pole of power source along wire moves to negative pole, electron occurs reduction reaction; The anion of electrolyte moves to lose electron ( have plenty of the metal atom of composition positive pole to lose electron ) to positive pole to occur oxidize reaction, electron flows from the positive pole of electrolysis pool, flow out reply along wire the posiitive electrode of source. So, current relies on the directional move of overcast and cation in electrolyte solution ( or melt form electrolyte ) and passes through solution ( or melt form electrolyte ), so, the conductive process of electrolyte solution ( or melt form electrolyte ) is the electrolysis process of electrolyte solution ( or melt form electrolyte ). Electrochemistry goes burr technology is with the development of electrochemical machining come a new technology, want only correct choice electrolysis liquid prescription and reasonable design tool negative pole with flow out site, the superiority that may develop electrochemical machining , can succeed exclude the burr that not easily removed with mechanical method, and have good surface quality. It has efficient, safe, reliable characteristic , and has good surface quality , raises 10 times generally speaking, than the efficiency of traditional technology more. Electrochemistry goes burr processing and the conventional difference of electrochemical machining is in in electrochemistry goes the electrolysis current quantity that burr needs is very little, pressure is very low. This is because of go to to exclude metal is few , processing quantity is little , the heat that electrolysis outcome loses and produces is also little cause. Rate of flow is little, , pressure is low, the capacity that causes pump is little, the overall type working case that not sealed up and the high rigidity of machine tool. Since processing gap so also does not need , is strict , accurate filter system. Electrochemistry goes , the basic principle of burr is the burr position that makes current site concentrate in workpiece highly, and carry out local positive pole to dissolve. It is the advanced position of the surface of positive pole because of this place that current site can concentrate in burr position highly. The characteristic on this geometry shape makes electric line concentrate in this relatively, it is this that the processing gap of place is again smaller than the gap of other workpiece surface position apparently, additionally, with the workpiece non processing position corresponding surface of negative pole applies have insulation layer, it has cut off the electric line that accesses to workpiece non processing position , has prevented being not the corrosion of processing surface. Chapter 2, it is the basic component to introduce electrolysis pool mainly. Electrolysis liquid is the carrier in electrochemical machining that positive pole dissolves. Have introduced classfication, basic requirement and the role of electrolysis liquid. For electrolysis, the performance of liquid also makes detailed analysis , at the same time also makes detailed analysis for the choice of electrolysis liquid. The total requirement for electrolysis liquid is: Processing efficiency is high , has high precision , surface quality good and practicality winner. But processing requirement and the difference of starting point, also have difference for electrolysis liquid even conflicting requirement. In processing process, the performance of electrolysis liquid should keep steady in order to be helpful for the stability inprocessing process and processing result. Chapter 3, a important content of major introduction of electrochemical machining, flows out design. It is concerning the shape of workpiece , at the same time concerns effect as well as the efficiency of processing. Based on angry liquid two-phase floating basic theory, have elaborated the gap of electrochemical machining flow out property in, have still described the gap of electrochemical machining flow out parameter distribution and the influence of it for type law. The technology before electrochemical machining is prepared: Must design tool negative pole in workpiece positive pole relative location and relative sport, process send into sport, must at the same time still design electrolysis current after processing the floating way of gap, it is for guarantee, processing precision and the stability in the process of electrochemical machining have important role. Current velocity is the major parameter that guarantees that the process of electrochemical machining has gone on steadily, and inlet pressure is the necessary condition of guaranteeing the speed of electrolysis current. Flow out uniformity to denote each place on processing surface rate of flow is adequate, even, not occur flow out line intersect flow out defect with other ——as empty cave phenomenon and separation phenomenon. The layout of coherent liquid groove ( hole ) directly influences electrolysis liquid flow out line distribution, so its layout design principle should guarantee to flow out line can spread evenly in entire processing is superfical, and avoid to flow out line intersect , do not arise poor liquid district; Work hard for process is even shorten process just as far as possible. The introduction electrolysis of Chapter 4 is except burr to exclude in hydraulic pneumatic valve valve body intersect in hole burr and tape recess hole groove side place a kind of effective method of burr. Burr does not influence electrochemistry by material hardness and tenacity, can go to exclude complex shape , use the burr that conventional means are hard to go to exclude. It also applies to the hydraulic pressure of other kinds , the element of atmospheric pressure go burr. Electrochemistry goes burr production efficiency is high, quality is good , can form even, smooth round angle after burr, minimum round angle radius may reach 0.05 mm, general surface Ra of surface roughness ≤1.6 μm. Electrochemistry goes , burr cost is low, it is simple that free from contamination operates. Chapter 5 has introduced electrolysis to go exclude burr machine tool form and characteristic, and for its overall planning work out to go on detailed introduction. According to the layout principle of the sport system of machine tool aswell as the influence for performance, have selected the element of the suitable type and composition of machine tool. Had been made finally the detail of feed system is untied. At last,I make the general plan for deburring equipment of hydraulic cylinder eye according to the electrochemical principle.