SFB TR96 – Thermo-energetic design of machine tools - Model and method for recording and balancing the energy converted in the grinding process

 

A major part of the machining energy incorporated into the grinding process converts into heat. This evolving heat splits up into the components tool, workpiece, coolant and chips. Depending on the components, the coolant strategy and the process guidance, the size and distribution of the energy flows vary and influence the thermo-elastic shift of the machine structure during grinding. During grinding, the workpiece material is machined by irregularly shaped, stochastically arranged abrasive grains on the grinding wheel topography. Therefore, it is very complex. Since the wear and the coolant strategy vary for each process, the energy conversion and heat flow distribution in the grinding process is insufficiently researched. Therefore, a prediction of the resulting heat flows and temperature fields is not possible yet.

The aim of the third phase is to extend the existing energy model for grinding processes by including the influence of grinding wheel on heat generation and heat propagation. Furthermore, the thermo-energetic design of machine tools will be investigated to determine how the varying heat generation and heat propagation over the transit wear condition of the grinding tool can be designed thermo-energetically by means of a coolant supply strategy tailored to demand.