摘要
汽车凸轮轴是汽车发动机的核心零部件。通过切削工艺方案设计及工艺主要参数计算得出了凸轮轴在加工过程中主要的加工工艺参数,采用“两顶一夹,中间支撑”的方式,设计了一款专用于汽车凸轮轴加工的数控车床。设计的重点包括专用夹持单元、中心架支撑单元和尾座伺服顶紧单元。通过对中心架支撑单元不同的支撑结构进行模态分析,以及基于有限元法对尾座顶紧力的计算结果,优化了凸轮轴的加工工艺。研究结果表明:固定支撑相较于浮动支撑,一阶频率由184.21Hz提升至228.35Hz,增幅达23.96%。工件在1000N~1500N顶紧力下的静态与动态变形量均小于0.02mm。实际生产的验证表明,该机床节拍、合格率以及可靠性均达到预期目标。
The camshaft is a core component of an automobile engine.The main machining performance parameters of the camshaft during the machining process were obtained through cutting performance calculations.A numerically controlled lathe specially designed for automobile camshaft machining was developed using the“two centers and one clamp with intermediate support”method.The key points of the design include a dedicated clamping unit,a center frame support unit,and a tailstock servo tightening unit.The machining process of the camshaft was optimized by conducting modal analysis on different support structures of the center frame support unit and calculating the tailstock tightening force using the finite element method.The results show that compared with the floating support,the first-order frequency of the fixed support is increased from 184.21Hz to 228.35Hz,with an increase of 23.96%.The static and dynamic deformation of the workpiece under a tightening force of 1000N to 1500N is less than 0.02mm.Practical production indicates that the machine tools cycle time,qualification rate,and reliability have all met the expected requirements.
作者
李亚聪
刘子涵
霍洪旭
LI Yacong;LIU Zihan;HUO Hongxu(General Technology Group Machine Tool Engineering Research Institute Co.,Ltd.,Shenyang 110142,China)
出处
《内燃机》
2025年第4期29-34,共6页
Internal Combustion Engines
关键词
凸轮轴
车削
专用机床
模态分析
顶紧力
camshaft
turning
special machine tool
modal analysis
preload
作者简介
李亚聪(1982-),男,硕士,高级工程师,研究方向为数控机床制造技术,E-mail:liyacong@gt.cn。
