Eccentric turning is a process commonly used for the mass production of crankshafts which, due to its complexity, requires specialised machinery. This complexity relies on the fact that the axis of rotation of the workpiece does not coincide with the axis of the area to be machined, which means that the workpiece and the machining are not coaxial.
When it comes to machining shorter series, it is necessary to use special fixtures to clamp the workpiece eccentrically or complex CAM programming. CMZ offers a solution for turning parts with eccentricity without the need for CAM programming or complex workholding.
In order to machine an eccentric figure, it is essential that the tool and the workpiece move synchronously. The workpiece rotates 360 degrees around the axis of rotation, while the turning tool follows a circular trajectory in the XY plane and simultaneously moves in the Z axis. The combination and repetition of these movement allows to machine a feature that is eccentric to the rotation of the lathe.
The correct definition of the variables is key to obtain the desired figure. This document aims to describe the process and help in programming it.
Eccentric machining is possible in all CMZ lathe models with Y axis.
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Our applications department can analyse in detail the process to be carried out and offer you a part study helping you to reduce cycle times.
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