超声波振动冲击对锯切过程中锯片自锐性的影响研究  

Influence of ultrasonic vibration on self-sharpening of diamond saw-blade during sawing process

作　　者：沈剑云[1] 向鑫[1] 徐西鹏[1] 

机构地区：[1]华侨大学机电及自动化学院,福建厦门361021

出　　处：《振动与冲击》2015年第12期46-50,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(51275181);教育部长江学者与创新团队发展计划(IRT1063);福建省自然科学基金(2012301215)

摘　　要：超声波振动辅助加工是一种很好的加工硬脆材料的方法,而且超声波振动冲击能够对金刚石磨具进行修锐。通过观察氧化铝陶瓷材料超声波振动辅助锯切过程中金刚石锯片表面磨粒和结合剂形貌变化、测试分析锯切力及力比的变化特征,研究超声波振动冲击对锯切过程中金刚石锯片自锐性的影响。在超声振动辅助锯切过程中锯片结合剂可被连续地去除使得其工作表面不断有新的磨粒出露,而且金刚石磨粒保持着合适的出刃高度和容屑空间,磨粒表面还可以被微破碎形成微切削刃,因此,保持金刚石锯片工作面得以保持着稳定的锐利性,这也使得在锯切过程中的锯切力和力比不随锯切行程的累积而明显增大。Ultrasonic vibration assisted machining is a widely used method for machining of brittle materials.The ultrasonic vibration also can dress the diamond grinding tool during the machining process.In the study,the influence of ultrasonic vibration on the self-sharpening of diamond saw-blade was investigated by observing saw-blade surface topography and analyzing cutting force during the process of ultrasonic vibration assisted sawing of alumina ceramic.The bond material of diamond saw-blade is continually removed and leads to new diamond protrusions on the blade surface under the shock of ultrasonic vibration.The diamond abrasives can keep always properly protrusive with enough chip space.Moreover,the shock of ultrasonic vibration can also break the diamond grits to produce micro cutting edges. Therefore,the saw-blade work surface steadily keeps sharp during ultrasonic vibration assisted sawing,and the sawing force and force ratio does not increase with the increasing of cumulative sawing paths.

关 键 词：超声波振动 锯切 自锐性 金刚石锯片 

分 类 号：TG580.6[金属学及工艺—金属切削加工及机床]