无心外圆超精机总体设计毕业论文

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1、 无心外圆超精机总体设计 摘 要 超精研是一个由磨料的振动从而对工件产生磨削的过程。在这个过程中 刀具有很高的速度，以便在接触旋转的工件时去除多余材料。 超精研通常被认为是最终的精加工工序，或是用在对难加工材料的加工 工艺中。因此，设计与工艺师尽可能使用包括陶瓷，钨和硅碳化物，轴承材 料，火焰和等离子涂料，硬铬等材料以提高加工质量 无心贯穿式超精机是以贯穿方式对圆柱(圆锥） 滚子表面进行超精加工的 一种机床，它不但具有高效高精度，能很好地改善工件的粗糙度、波纹度和 圆度的优点，而且能形成微量凸度，如果使用这种带凸度的滚子装配轴承就 能地减少或消除滚子边缘应力集中，减小温升，有利于弹性流体润滑从

2、而提 高轴承的使用寿命 1-2 倍。 此次主要是关于无心外圆超精机的总体设计实现油石振荡部件和工件定 位驱动部件的组合确定机床配置形式、制订影响机床总体布局和技术性能的 主要部件的结构方案。总体方案的拟定是设计组合机床最关键的一步。方案 制定的正确与否，将直接影响机床能否达到合同要求，保证加工精度和生产 率，并且结构简单、成本较低和使用方便。 关关 键键 词词 ：圆柱滚子外圆超精机，总体设计，油石振荡部件，定位，驱 动。 THE OVERALL DESIGN OF CENTERLESS SUPERFINISHING MACHINE FOR CYLINDRICAL ROLLER ABSTRACT

3、 Superfinishing is a process that induces a vibratory rubbing action of the abrasive stone with respect to the workpiece.The process involves high speed oscillation of the tool,which removes material by contacting a rotating workpiece. Superfinishing is considered as the ultimate finishing process f

4、or progressive applications and exotic materials that traditionally have been considered difficult-to-machine material. Hence, it allows design and manufacturing engineers to improve quality by using materials that include ceramics,tungsten and silicon carbides,bearing materials,flame and plasma coa

5、tings,hard chrome,etc. Inadvertent cross-cutting of ultra-precision machine is way through the cylinder (Cone) roller surface Superfinishing a machine, it not only with high precision, could well improve the roughness of the workpiece, bellows and roundness of the merits of , But also a trace crown,

6、 if the use of such crown with the roller bearing assembly will be able to reduce or eliminate roller edge of stress concentration, reducing the temperature rise is conducive to flexible fluid lubricating bearings to improve the life expectancy of 1-2 Times. This is mainly about the ultra precision machine centerless overall design. Realize important oscillation components and parts of workpiece position drive. Determine the machine configuration forms, affect overall arrangement and technica