Modeling Grinding to Predict Residual Stress Distribution inand the Metallographic Structure of the Workpiece

开发机器系统所需的科学基础的一部分是对工具和工件之间的界面处发生的现象的知识和理解。这些现象通常是复杂的，理解它们所需的研究是困难的。通常涉及几个技术学科，需要一个专家团队。这项研究的目的是为了了解在磨削单元操作过程中，在工件表面及其附近发生了什么。这种方法既需要理论，也需要实验。该理论要求使用机械、本构和热传递方程，用于平面磨削和外圆磨削。必须考虑到相变。有限元方法将用于计算温度分布和残余应力场。实验将在304不锈钢、1040碳钢、4340合金钢和52100钢上进行。将测量磨削力、砂轮速度、温度、残余应变、显微硬度和转化产品的体积分数。然后将理论结果和实验结果进行比较。

Part of the science base required for development of machine systems is knowledge and understanding of the phenomena which occur at the interface between tool and workpiece. These phenomena are generally complex, and the research required to understand them is difficult. Usually several technical disciplines are involved, requiring a team of experts. This research is aimed at understanding what happens in and near workpiece surfaces during the unit operation of grinding. The approach entails both theory and experiment. The theory requires use of mechanical, constitutive, and heat transfer equations, for both surface and cyclindrical grinding. Phase transformations must be taken into account. The finite element method will be used to calculate temperature distributions and residual stress fields. The experiments will be performed on 304 stainless steel, 1040 carbon steel, 4340 alloy steel, and 52100 steel. Measurements will be made of grinding forces, wheel speed, temperatures, residual strains, microhardness, and volume fractions of transformed products. Theoretical and experimental results will then be compared.