难加工材料铣削残余应力研究进展

发布时间：2019-04-09 11:13

【摘要】：镍基高温合金、钛合金等材料具有良好的高温强度、耐热性和耐腐蚀性等优异性能,已广泛应用于航空航天领域,然而这些材料属于典型的难加工材料,其相对切削加工性能很差,且已加工表面易产生显著残余拉应力,严重影响零部件使用寿命及性能。通过适当的方法调整和控制已加工表面的残余压应力,可以明显提高零件疲劳强度和耐腐蚀性。压应力制造技术是指以获得残余压应力为目标的制造技术,是一种典型的抗疲劳方法。将超声技术与其他加工方法复合实现残余压应力的主动控制,是目前抗疲劳制造技术的主要方法之一。然而,由于受超声加工的临界速度限制,超声与高速复合加工的研究相对较少,但两者均是目前压应力制造领域高度关切的先进加工方法,如果两者能有效复合,必将使核心部件制造在保证更加优良的抗疲劳性能的同时,获取更高的效率。通过分析铣削加工、高速加工以及超声振动加工中残余应力的研究现状,提出可将高速加工和超声振动加工相结合,从而实现难加工材料的高效压应力制造。
[Abstract]:the nickel-based high-temperature alloy, the titanium alloy and the like have excellent properties such as good high-temperature strength, heat resistance and corrosion resistance, and are widely applied to the field of aerospace, And the service life and the performance of the parts are seriously affected. The residual compressive stress of the machined surface can be adjusted and controlled by the appropriate method, and the fatigue strength and corrosion resistance of the part can be obviously improved. The pressure-stress manufacturing technology refers to a typical anti-fatigue method, which refers to the manufacturing technique with the aim of obtaining the residual compressive stress. The combination of ultrasonic and other processing methods to realize the active control of residual compressive stress is one of the main methods of anti-fatigue manufacturing technology. However, due to the critical speed limit of ultrasonic machining, the research of ultrasonic and high-speed composite machining is relatively small, but both are advanced processing methods of high concern in the field of pressure stress manufacturing, and if both can be combined effectively, The core component can be manufactured at the same time of ensuring more excellent anti-fatigue performance, and higher efficiency is obtained. By analyzing the research status of residual stress in machining, high-speed machining and ultrasonic vibration processing, it is proposed that high-speed machining and ultrasonic vibration processing can be combined to realize the high-efficiency stress-stress manufacturing of hard-to-be-processed materials.
【作者单位】：河南理工大学机械与动力工程学院;
【基金】：国家自然科学基金(51475148) 河南省基础与前沿技术研究计划项目资助(152300410102)~~
【分类号】：TG54

【相似文献】