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微細(xì)電火花線切割加工表面干摩擦磨損特性
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工業(yè)與信息化部基礎(chǔ)科研項(xiàng)目（J192007B001）


Tribological Properties of the Micro-WEDM Surface under Dry Friction and Wear Conditions
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    摘要:

    以球—面接觸方式,，在0.6mm振幅下,，研究微細(xì)電火花線切割加工表面在不同載荷和不同頻率下的往復(fù)滑動(dòng)干摩擦磨損行為，并探討其磨損機(jī)理,。結(jié)果表明,，微細(xì)電火花線切割加工的模具鋼M42表面,，隨著載荷的增加,，摩擦過(guò)程轉(zhuǎn)變?yōu)槿w摩擦,，降低了摩擦因數(shù),；隨著頻率的增加,，由于溫升形成的氧化膜降低了微凸體接觸界面的抗剪強(qiáng)度,，從而使摩擦因數(shù)降低；磨損體積隨著載荷和頻率的增大均呈增大的趨勢(shì),，磨痕呈現(xiàn)為典型的粘著磨損和氧化磨損機(jī)制,。

    Abstract:

    The reciprocating sliding tribological behavior of the micro wire electrical discharge machining (micro-WEDM) surface was investigated under dry friction and wear conditions by using the ball-on-flat contact model with 0.6mm amplitude. The influences of different loads and frequencies on the friction coefficient were analyzed and the wear mechanism was also studied. The results showed that the friction coefficient decreased with the load increasing because of the third body friction, friction coefficient decreased with the frequency increasing because the oxide film formed with temperature rising led to the decrease of shear strength of microtip contact surface. The wear-loss volume of the micro-WEDM surface increased with load and frequency increasing, and the wear scars appeared adhesion and oxidation wear mechanism.

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丁海娟,崔海,張志航,郭黎濱.微細(xì)電火花線切割加工表面干摩擦磨損特性[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(1):228-232. Ding Haijuan, Cui Hai, Zhang Zhihang, Guo Libin. Tribological Properties of the Micro-WEDM Surface under Dry Friction and Wear Conditions[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(1):228-232.

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