摘要
螺旋铣孔技术是航空装备制造领域新出现的制孔技术,因具有加工质量好、效率高等优点被用于加工钛合金、复合材料等难加工材料。采用包括切削速度、切向每齿进给量、轴向每齿进给量和螺旋导程4个基本加工参数描述螺旋铣孔过程,分析了基本参数和螺旋铣孔输入加工参数(自转、公转、进给)之间的关系。在自行研制的螺旋铣孔试验平台上开展了钛合金材料的加工试验,研究了钛合金螺旋铣孔加工中切削温度及切削力的特征,以及基本加工参数对切削温度和切削力的影响规律。试验结果表明,在螺旋导程一定时,切削温度主要由切削速度决定,而与轴向每齿进给量及切向每齿进给量无明显关系;而切削力的影响规律与切削温度相反。切削温度是影响螺旋铣孔过程中刀具磨损及加工孔质量的主要因素。在需同时保证加工效率及加工质量的前提下,应尽量选择大的切向每齿进给量、大的轴向每齿进给量和较低的切削速度。
Helical milling is a new technology in aircraft manufacturing industry, which is widely used for processing difficult-to-machine materials such as titanium alloy and composite materials. In this paper, basic parameters including cutting speed, depth setting per helical rotation, axial feed per tooth and tangential feed per tooth have been used to describe the helical milling process. The relationship between the basic parameters and input parameters（spindle speed, revolution speed, feeding velocity） has been analyzed. The helical milling experiments of titanium alloy were performed on a selfdeveloped helical milling equipment. The characteristics of cutting temperature and cutting force have been studied. The influences of the basicparameters on the cutting temperature and cutting force have been discussed. Experimental results show that the cutting temperature is mainly decided by the cutting speed. Axial feed per tooth and tangential feed per tooth have little effect on the cutting temperature. The basic parameters show a reverse influence on the cutting force. The cutting temperature is the main factor affecting the tool wear and quality of the hole. Larger axial feed per tooth and tangential feed per tooth and lower cutting speed could be chosen to ensure the efficiency and quality simultaneously.
出处
《航空制造技术》
2016年第9期91-97,共7页
Aeronautical Manufacturing Technology
基金
国家"863"计划课题(2013AA040104)
国家"973"计划课题(2011CB013201)
国家自然科学基金项目(51575085)
关键词
钛合金
螺旋铣孔
切削温度
切削力
Titanium alloy
Helical milling
Cutting temperature
Cutting force
