Abstract
Coolants are widely used to dissipate grinding heat in conventional grinding. This process, however, is not satisfactory as coolants often lose efficacy in grinding due to film boiling and can result in adverse health and environment effects. The present paper put forward the concept of a rotating heat pipe grinding wheel, attempting to reduce or eliminate the coolant amount and realize green machining. The heat transfer performance of rotating heat pipe grinding wheel was studied by using volume of fluid method in ANSYS/FLUENT. The influence of the input heat flux, filling ratio and rotational speed were investigated by a simulation method. Results show that the appropriate heat flux range for the rotating heat pipe grinding wheel was from 2000 to 100,000 W/m2, the ideal filling ratio was 50% and the rise of the rotational speed turned out to weaken the heat transfer coefficient. Finally, dry grinding experiments on Ti-6Al-4V were performed and the temperatures in both the rotating heat pipe and the grinding contact zone were monitored. The new designed rotating heat pipe grinding wheel showed a good prospect for application to green grinding of difficult-to-cut materials.
Highlights
Sustainable manufacturing is a specialized branch of sustainability, aiming towards the improvement of technological, environmental and economic aspects of manufacturing processes.Energy efficient, low waste generation, cost effectiveness, operational safety and operator’s health are the key features of sustainable manufacturing operation [1]
In order to discuss the heat transfer capacity of the rotating heat pipes [8–10] (RHP)-GW, an equivalent heat transfer coefficient is defined by the following equation: q00 in
The conclusion can be drawn that the optimized parameters that obtained by simulation was suitable for the rotating heat pipe grinding wheel (RHP-GW)
Summary
Sustainable manufacturing is a specialized branch of sustainability, aiming towards the improvement of technological, environmental and economic aspects of manufacturing processes. In addition to the abovementioned methods, rotating heat pipes [8,9,10] (RHP) have long been known as an effective cooling device that transfer heat by an internal phase change process. Judd et al [11] successfully reduced the bearing temperature by 50%, with an axially RHP embedded in the spindle. Energies 2020, 13, x FOR PEER REVIEW temperature in a deep-hole machining process by designing an axially RHP drill. The grinding temperature in the contact zone and the workpiece monitored and compared with the simulation results. The grinding temperature in the contact zone quality tested to confirm the tested feasibility of the RHP cooling of of the the grinding and theare workpiece quality are to confirm the for feasibility.
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