Mechanical roughing of cylinder bores in light metal crankcases
Mechanical roughing of cylinder bores in light metal crankcases
复制标题
轻金属曲轴箱缸孔的机械粗加工
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
C. Schnell
中科院分区：
文献类型：
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作者：
H. Hoffmeister;C. Schnell
人们对降低油耗和排放的车辆的需求不断增长，这也是汽车工业中经常使用铝作为曲轴箱材料的原因。然而，共晶铝合金的缺点是，由于其摩擦学特性，它们不能用于气缸孔表面。提高耐磨性的一种方法是采用热喷涂工艺对表面进行涂层。在这种情况下，涂层材料例如钢丝熔化。熔融颗粒在镗孔表面凝固，从而在缸孔上形成耐磨涂层。为了保证涂层附着在铝上，需要对表面进行粗糙化处理。本文介绍了一种采用改进的精镗工艺对轻金属曲轴箱缸孔表面进行粗加工的方法。
The increasing demand on vehicles with reduced fuel consumption and emission is the reason why aluminum is frequently used as material for crankcases in the automotive industry. Eutectic aluminum alloys, however, have the disadvantage that they cannot be used for the cylinder bore surface due to their tribological qualities. A method to increase the wear resistance is to coat the surface by using a thermal spray process. In this case a coating material e.g. a steel wire is melted. The molten particles solidify at the boring surface so that a wear resistant coating of the cylinder bore is produced. In order to guarantee that the coating adheres to the aluminum, it is necessary to roughen the surface. This paper describes a method of roughing the surface of the cylinder bores of light metal crankcases by using a modified fine boring process.