Рубрика: Handbook of Machining with Grinding Wheels

BASE MATERIALS

10.4.1 Introduction In many cases, mineral oils are used as the base material for cooling lubricants. Mineral oil bases consist of hydrocarbons with mostly paraffinic, naphthenic, or aromatic structures. Depending on the fraction of the paraffins, naphthenes, and condiments, a distinction can be made between paraffin-based, naphthene-based, and mixed base oils [Mang 1983, Moller and […]

ELEMENTS OF AC SERVODRIVE BALLSCREW SYSTEMS 15.8.1 The Ballscrew

A ballscrew (or recirculating ball leadscrew) is at the heart of a controlled linear-motion system. It is a precision-ground hardened steel or stainless steel threaded shaft on which a ballnut rides with rolling contact to provide a positive, high efficiency of transmission and low friction. The ballscrew is manufactured by turning, heat treating, and then […]

THE WORKREST

The support surface of a workrest should be harder than the workpiece. The workrest also has to be tough and capable of withstanding the knocks encountered on the factory floor. The wear-resistant surface of the workrest is selected according to the types of work material ground. For steels, tungsten carbide inserts provide a suitable surface. […]