Undertake to cylinder body working face quick Mao Hua is handled

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The new technology of careful boring can be opposite a kind of vest in the light metal working face of air cylinder undertakes making wool, so that realize thermal spraying. Its advantage is to shorten handling time, raise spray absorption affinity and simplify treatment flow. Mix to feebleminded bad news low the demand that discharges a car is growing day and day, this brought greater and greater pressure to auto industry, make auto industry search program of all sorts of innovation technology actively, with satisfying the requirement of this respect stage by stage. Mix to car specific power consumption those who discharge generation to be affected directly is automobile body total mass. Accordingly, in recent years business of a lot of automobile factories has used aluminous simple stuff to replace common grey mouth crankcase of cast-iron air cylinder. Face of air cylinder lens uses thermal spraying to be aimed at AlSi inferior in all brilliant alloy, at present besides single material plan (AlSi17) besides, still can adopt a few otherer diversity or approximate and single technology program, so that such as grey mouth the component such as cast-iron gasket is pressed or pouring in air cylinder crankcase. But, use gas cylinder bushing to have a lot of drawback. For example truckload weight increases and be out of shape because of differring to heat up adjustable coefficient and arise etc. A kind of new better method is to use thermal spraying craft to have coat to working surface. Coating ply is 300 μ M about at first, next reassume honing comes 150 μ of 100 ～ M. The material with this kind of very small coating different foundation and exterior figure, have very good attrition character. Very thin coating can reduce the width of a clapboard of air cylinder effectively, reduce weight further. In moving to be in, ensure the in good condition sex of coating function, a fundamental premise condition is the precondition job that air cylinder working face is aimed at thermal spraying. Current technical current situation is law of arenaceous eject of high-pressured water jet or corundum, also can use chemical conglutinate method. To this, want to have dozen of complete hair to will making the appearance of coating, good mechanical adhesiveness is achieved in order to ensure aluminium is qualitative between base and gush coating can. Although this kind of method can achieve reliable result, but, its oneself has a few apparent drawback. For example, to the additional investment of support features, technological process time is long, of the chemical on conglutinate layer clear and discharge very give or take a lot of trouble. Use cutting craft to realize specific conglutinate token to stem from the reason of this respect, machine tool of university of TU Braunschweig technology and processing technique institute (IWF) in BMBF project (the coating of accept rice crystallization of derv of Nacolab-Composit Gao Zaihe and working face of gasoline engine air cylinder) the development inside frame gives technology of a kind of cutting, it uses a kind of special cutting tool external form, inside flow of work of boring of an amendatory essence, specific conglutinate appearance is cut on air cylinder working face. This kind of method has clear advantage. The craft making wool of IWF place research and development belongs to a kind to use special model the cutting flow of edge. Treatment exercise does not have special requirement to equipment, can undertake on the CNC machining center in convention. In the tool the respect can use groovy bit body, on this bit body solder enters the built-in system of compound crystal diamond. Add two opposite the crucial point through electric spark craft on built-in body. Bit installation is in groovy, commonly used on the blade holder on milling of air cylinder working face or exercise of boring of essence of life (graph 1) . Special bit body appearance is in apparently cut " whorl " in in the begining, have mill of essence of life to air cylinder working face, change the cutting tool that contains external form of special dislocation razor blade next. Cutting tool passes runner shaft coming back to have an action, according to constant feed, introduce grease emulsion along aperture of air cylinder axis at the same time and in aperture apparently cutting gives a kind of whorl (graph 2) . Nextpage cutting principle sees a picture 3. It is an edge is in in cutting only at first apparently build a kind of dentate structure. After rotating through a few weeks, the 2nd edge also throws exercise. The outline of appearance of conglutinate of swallow end account that will finish place to need from this (graph 4) . This kind of appearance ensured spray layer and the very firm agglutinate that make the material end Mao Ji. Graph the working face that 4 courses make wool (A) the transverse burnish with working surface (B) . The data of XPT512 plasma layer that uses Sulzer Metco firm has coat at the same time, undertook study to the influence of conglutinate tensile strength to cutting deepness. Study the result makes clear, when cutting deepness achieves M of about 75 μ , can achieve enough adhesive strength. When cutting deepness to achieve M of about 100 μ , can achieve first-rate result, the adhesive strength that measures right now can achieve 60MPa. The graph shows the REM state that is working face of the air cylinder that make wool 4 times, it mirrors those who give a kind of place to need to make wool construction kill. Continue to raise cutting deepness to appear to not was necessary at present, because increase cutting deepness to need bad news to use more spray data,this is, also not was necessary to increase treatment power to edge again on the other hand. After undertaking hitting Mao Zhi to air cylinder working face, honing main shaft stops in the extreme of air cylinder working face, cutting tool machines an axis to pull out from Kong Zhong through vertical. Cutting time is in about 10 ～ 20s, inspect working surface length is decided with the circumstance of aluminous qualitative alloy, apparent of course the handling time under groovy eject method. Edge appearance research and development enhances exercise security in undertaking experiment and optimizing a process to uses bit body, in edge appearance optimize on took a lot of step. To enhance exercise security, the appearance that enlarged edge added the 2nd pair of redundant bit on bit body. The appearance design of these razor blade can come true make the cutting contrail of the 3rd razor blade apropos the orbit coincide with the first razor blade, contrail of the 4th razor blade criterion with coincide of contrail of the 2nd razor blade. Its are main a certain razor blade that once the first pair of razor blade are medium,the advantage depends on appears attaint, won't happen discard as useless phenomenon. Pass the relay of follow-up razor blade, the appearance that can ensure place is machined reachs wants swallow end form. Front razor blade assumes major cutting to work another kind of method is before receive a razor blade of strong and durable old point of view, it can assume the cutting job that has much. Right now, the function of bit is to what already machined the appearance undertakes a few complement are machined only from the back. From this OK and great the bear rate that reduces each razor blade. These cutting tool still are in at present experiment and evaluate level. The field is developed in bit material, still making continual research at present. In respect of coating technology research and development, had gained a few active headway in last few years, also came true a few paper-thin with the wear-resisting coating with appearance distinct outline. CNC Milling