Three-dimensional finite element model of friction drilling process in hot forming processes

Abstract

Friction drilling processes are used commonly in hot forming operations. This process is similar to drilling processes but without using chip. This process is used especially for joining thin-walled metal components. In this study, the drilling process using centerdrill is investigated both experimentally and numerically. The finite element analyses (FEA) were conducted using deform-3D software based on finite element method (FEM). In this study, an analytic model is developed, which calculate the process parameters as torque and axial power, heat transfer coefficient. A comparison was also made for temperature, torque and axial force obtained from experimental and numerical analyses. At the end of the study, while the torque and axial force values decrease with increasing of spindle speed, temperature values of centerdrill and workpiece increase with increasing of spindle speed. A good consistency between both experimental and FEA simulations was found during the centerdrill process.

Imitation analysis of cremation furnace heat transfer under the finite element simulation software

“…Through the actual situation of body incin- eration, k-ε model is selected to calculate the turbulent flow field in this study. Among the three k-ε models mentioned previously, the realizable k-ε model was selected in this study due to the shortcomings of the standard k-ε, RNG k-ε model, and k-ω model in the calculation of turbulent flow field [10,11]. The CFD software FLUENT6.3 is adopted to simulate the flow and combustion information in the cremation furnace.…”

Process optimization for maximizing bushing length in thermal drilling using integrated ANN-SA approach

“…Biermann et al [26] established the possibility of process in Mg alloy and then evaluated the performance features such as thrust forces as well as torque. Bilgin et al [27] explored thermal drilling on AISI 1020 steel by experimental and numerical simulation approach. Comparable work was accomplished by the author's previous work [28] in thermal-drilled AISI 304 steel.…”

Finite-element simulation and validation of material flow in thermal drilling process

“…They examined the temperature distribution, torque and thrust force. Bilgin [9] developed finite-element model by the DEFORM-3D software to compute the torque, thrust force, and heat transfer coefficients in the TD process of AISI 1020 steel. Miller et al [10] carried out experiments on TD of Al 5052, titanium, AISI 1020 steel, and AISI 4130 steel and carefully studied about the microstructural changes during TD process.…”