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常规激光加工技术多是利用高温使材料熔化或气化而达到加工目的,但是往往需要克服在激光加热过程中引起的材料软化和热应力。探讨了利用激光加热引起的软化和热应力效应进行加工的可行性,主要研究了激光加热辅助切削(LAM)技术和激光加热弯曲三维成形技术等非常规激光加工技术,着重探讨了LAM陶瓷材料的温度场变化、切屑形态和加工表面形貌,以及激光加热弯曲三维成形过程中轨迹规划策略、温度场、应力场和形变场的传播过程,建立了两种加工技术的理论分析模型和实验系统,并利用该系统进行了大量的实验研究,获得了较好的加工效果,为实际加工奠定了理论基础。
Conventional laser processing technology is to use high temperature melting or gasification of materials to achieve processing purposes, but often need to overcome the laser heating process caused by material softening and thermal stress. In this paper, the feasibility of processing by laser heating induced softening and thermal stress is discussed. The LAM technology and unconventional laser processing technology such as laser heating and bending three-dimensional forming technology are mainly studied. The effects of LAM ceramic material Temperature field, stress field and deformation field, the theoretical analysis model and experimental system of two kinds of processing technology are established. The three-dimensional modeling of laser heating and bending process, And a great deal of experimental research has been carried out by using the system to obtain a better processing result, which has laid a theoretical foundation for actual processing.