Calculation And Simulation Of Orthogonal Metal Cutting Temperature Field

Metal cutting is a process with exceeding non-linear and heat-stress coupled. The heat is mostly from the distortion of chip (shear plane heat source) and the friction at the tool-chip and tool-work interface (frictional heat source). The both heat source area are not big, but the temperature in this area is very high, once some scholarspoint out that the high temperature can reach 1000 ℃. The high cutting temperature is the main reason of the tool's abrasion and it also can debase the precision of the machined surface and take the machined surface bring residual stress and other flaws. Because the influence of temperature to tool area, work material performance's variety and the machined surface's quality, the research to temperature field in metal cutting is very important. In this paper, the main work is to explore the temperature's distribution in tool area, chip area and workpiece area. Firstly, star from the foregoing research of others, the author educes a modificatory model to study the temperature field and gives a method to compute the temperature distribution in metal cutting. Then the author uses the foregoing scholar's experimental findings to draw the temperature distribution curve. At last, the author uses the current FEA software (ABAQUS) to analyze the temperature distribution and give a dynamic intuitionistic answer for the problem.The paper's innovation is from two aspects to study the temperature distribution. The most important point is that at the base of FEM theoretics, combining the character of ABAQUS/Standard and the actual machining condition, give the constitutive equations according the work and tool's material changing with temperature. The author modifies the Coulomb friction law and defines a bonded interface along the cutting path and by applying a critical stress separation criterion available in ABAQUS to the stress state at a fixed distance ahead of the tool tip. The result from FEA is alike the result from numerical computation and the result maybe offer some beneficial reference.