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随着现代科学技术的迅速发展,新的测试手段不断涌现,如扫描电子显微镜和透射电子显微镜的问世,把金属切削理论的研究引进了微观领域。本文利用双层剪切削爆炸式车削快停装置自由车削黄铜管端面,按不同切削参数制取切屑根部标本(图1)。用万能工具显微镜测出切屑厚度α_o和实际切削层厚度α_c,按ξ=α_o/α_c求出变形系数。用扫描电镜观察切屑顶面的形貌,并测出层片宽度。实验表明:
With the rapid development of modern science and technology, new test methods are emerging, such as the advent of scanning electron microscopy and transmission electron microscopy, the introduction of the theory of metal cutting into the micro-field. In this paper, a double-cut shear-blast turning fast-stop device is used to free-cut the end face of the brass tube. Samples of the root of the chip are prepared according to different cutting parameters (Figure 1). Measured with a universal tool microscope chip thickness α_o and the actual thickness of the cutting layer α_c, according to ξ = α_o / α_c Determine the deformation coefficient. Scanning electron microscopy was used to observe the morphology of the chip top surface and to measure the width of the ply. Experiments show that: