Research On The Temperature Field Of Heat Pipe Grinding Wheel In High Efficiency Grinding

Due to the low thermal conductivity of difficult-to-machine material, the contact zone easilyaccumulates heat and leads to high grinding temperature in high efficiency grinding. The highgrinding temperature causes a series problems such as the work piece burned, low material removingand quick wearing of grinding wheel. Therefore, it is very important to use an effect cooling method.The Heat Pipe Grinding Wheel (HPGW), applying the heat pipe technology to the grinding, is hopefulto make the heat of grinding contact zone leave out and control the grinding temperature effectively.This idea gives a new way to solve the heat problem in grinding process.This paper is based on the thinking of the heat pipe technology to enhance the heat transfer ingrinding zone. FLUENT software is used to build the HPGW model and calculate the heat transferperformance of HPGW in different condition such as heat flux, rotation speed, the wall thickness andarrange of the grains. In the end, compared with grinding wheel without heat pipe in FLUENT and inexperiment, the results prove the better heat transfer performance of HPGW. This paper is mainlyresearch on these follows:（1）Based on the principle and structure of loop heat pipe, the simulating model is built in thespecial software GAMBIT. The model is including primary structure of grinding wheel, heat pipe,grains and heat source. The model grid is divided by Tri type in a gradually transit from small to big.（2）Analyzing the influences of heat flux, rotation speed, wall thickness and the forms of grainson the grinding temperature. Also compared with the grinding wheel without heat pipe in the samecondition, the heat transfer performance of HPGW is better. The results show that the grindingtemperature of HPGW go up with the rising heat flux, decrease with the rising rotation speed and thelarger gap between the row grains, and the start time of heat pipe get longer when the thickness isincreased. Furthermore, the grinding temperature of HPGW is much lower than the grinding wheelwithout heat pipe.（3）The HPGW and the grinding wheel without heat pipe are respectively used to conduct drygrinding on TC4. According to the heat flux formula, the results of experiment is comparing with theresults of numerical simulation. It shows they have the same trends; and proves the HPGW has abilityof cooling and controlling the grinding temperature.