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Measurements and Simulations of Temperature and Deformation Fields in Transient Metal Cutting

机译:瞬态金属切削中温度和形变场的测量和模拟

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摘要

Advanced finite element software makes it possible to perform accurate simulations of orthogonal metal cutting provided all input parameters such as material properties, fruition and material separation criteria are known. In principle, such properties can be determined by performing a series of cutting experiments and mechanical property tests, and then iterating the finite element simulations until acceptable agreement is reached. Cutting measurements have generally included only cutting forces and tool-chip temperatures. We hypothesize that b closely coupling simulations to conventional cutting force measurements and with fine scale spatial and temporal experimental measurements of temperature and strain fields, questions related to the choice of parameters in finite element simulations can be resolved. As a step towards that resolution a method for high resolution experimental measurements of temperature and strain fields is presented here. Temperatures of the workpiece and chip are measured during transient metal cutting over areas of 27 * 27 μm and time scales of 200 ns by using infrared detectors. Three different materials, 1018CR steel, Al6061-T6 and Ti-6Al-4V are tested. A grid method is used to measure deformations in steel with a spatial resolution of 50 μm.
机译:先进的有限元软件可以对正交的金属切削进行精确的模拟,前提是已知所有输入参数,例如材料特性,结果和材料分离标准。原则上,可以通过执行一系列切削实验和机械性能测试,然后迭代有限元模拟直到达成可接受的协议来确定此类性能。切削测量通常仅包括切削力和刀具切屑温度。我们假设通过将模拟与常规切削力测量紧密结合,并通过精细的时空温度和应变场实验测量,可以解决与有限元模拟中的参数选择有关的问题。作为达到该分辨率的一个步骤,此处介绍了用于温度和应变场的高分辨率实验测量的方法。通过使用红外探测器在27 * 27μm的面积和200 ns的时间范围内进行瞬时金属切削期间,测量工件和切屑的温度。测试了三种不同的材料1018CR钢,Al6061-T6和Ti-6Al-4V。网格方法用于以50μm的空间分辨率测量钢中的变形。

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