What is the rigidity of process system in metal cutting?
In order to analyze and calculate the influence of the deformation of the process system on the machining accuracy, a useful concept, the stiffness of the process system, is introduced.
The so-called process system stiffness, refers to the workpiece surface processing in the cutting force to the component Fp, the tool relative to the workpiece in the direction of the Y shift ratio: k=Fp/y
The stiffness of the process system is equal to the reciprocal of the sum of the rigidity of the machine tool, the fixture, the tool and the workpiece.
When the lathe tool cuts the workpiece, the cutting forces on the cutting edge and the workpiece are affected by equal and opposite cutting forces, while the component Fy of the cutting force has the greatest influence on the machining accuracy. Under the influence of the cutting force, the tool (due to the deformation of the process system) and the relative decline of the workpiece.
