变螺旋立铣刀切削过程稳定性快速预测方法  

Rapid prediction method of milling process stability with variable helix cutter

作　　者：靳刚[1] 李昂 于晓蕾 李占杰[1] 李栋[1] 

机构地区：[1]天津职业技术师范大学天津市高速切削与精密加工重点实验室,天津300222 [2]天津航天长征火箭制造有限公司,天津300300

出　　处：《机械设计》2016年第8期43-47,共5页Journal of Machine Design

基　　金：国家自然科学基金资助项目(51405343);天津市高等学校创新团队培养计划资助项目(TD12-5043);天津市科技支撑计划重点资助项目(14ZCZDGX00002)

摘　　要：使用变螺旋铣刀能较好地抑制切削颤振。文中构建了变螺旋铣刀铣削过程稳定性预测模型,通过平均处理模型的切削力方向系数、切削深度轴向切片技术,获得了系统的简化模型。对模型中的时滞状态项进行拉格朗日插值,获得了方程的离散映射形式,进而确定了系统的稳定性域,最终提出适用于文中预测模型的全离散求解方法。通过与前人相关方法的对比算例表明,该方法有效且具有较高的计算效率。The use of variable pitch or helix could prevent chatter in milling. In this paper, a stability prediction model was established. The simplified system model was obtained through the control of cutting direction ratio, cutting depth. The Lagrange interpolation was performed using the time-Lagrannge on the time-lagging. The discrete mapping form can be determined to ensure the system stable region. The full discrete solution method that meet the predicted model was presented. The results showed that the proposed method was effective for stability prediction of milling with variable-helix cutter and has good computational efficiency while compared with forefathers.

关 键 词：铣削 颤振 稳定性叶瓣图 变螺旋角 

分 类 号：TH161.6[机械工程—机械制造及自动化]