This article is about the machining operation. Unsourced material may be challenged and maintenance of lathe machine pdf. CNC is also commonly used with many other types of machining besides turning. 1, 2, or 3 axes of motion to produce precise diameters and depths.
CNC it has become unusual to use non-computerized toolpath control for this purpose. Each group of workpiece materials has an optimum set of tools angles which have been developed through the years. That is, the part is rotated while a single point cutting tool is moved parallel to the axis of rotation. The proper expression for making or turning a shape is to generate as in to generate a form around a fixed axis of revolution. Hard turning, when applied for purely stock removal purposes, competes favorably with rough grinding. However, when it is applied for finishing where form and dimension are critical, grinding is superior. Grinding produces higher dimensional accuracy of roundness and cylindricity.
8z cannot be achieved with hard turning alone. Hard turning is appropriate for parts requiring roundness accuracy of 0. It is used for gears, injection pump components, hydraulic components, among other applications. It is frequently the first operation performed in the production of the workpiece, and often the last—hence the phrase “ending up”. Enlarging or smoothing an existing hole created by drilling, moulding etc. This work is suitable for castings that are too awkward to mount in the face plate. On long bed lathes large workpiece can be bolted to a fixture on the bed and a shaft passed between two lugs on the workpiece and these lugs can be bored out to size.