一种牙盘式分度转台的优化设计  

Optimal Design of a Tooth Disc Indexing Turntable

作　　者：张伟[1] 邱岩[1] 肖潇[1] ZHANG Wei;QIU Yan;XIAO Xiao(Shenyang Machine Tool Co.,Ltd.,Shenyang Liaoning 110142,China)

机构地区：[1]沈阳机床股份有限公司,辽宁沈阳110142

出　　处：《机床与液压》2023年第8期112-115,共4页Machine Tool & Hydraulics

摘　　要：介绍一种改进牙盘式数控转台的设计过程。对芯轴进行创新设计,采用弹性约束方式,将芯轴浮于油缸的活塞孔中,在双联牙盘啮合过程中保证芯轴可随动摆动,转台升降旋转过程不再受芯轴同轴精度影响,使牙盘副完全自定心啮合,转台精度与牙盘副精度高度一致,保证主机构工作过程的同心性。采用双导程蜗杆实现消隙,增加传动系统精准性及使用寿命;应用双联牙盘实现定位及锁紧,由圆周360个齿牙啮合的均布化实现最小分度为1°,依靠凸齿、凹齿啮合实现自动调心,确保定位精度。对牙盘进行强度校核,对最大夹持力和载荷进行计算。设计一种新型到位检测机构,为转台工作时牙盘分离和啮合的位置到达进行检测。最后进行几何精度调试及测量,对定位精度和重复定位精度进行检测与分析,验证设计的正确性。An improved design process of dental disc NC turntable was introduced,innovative design was carried out on the mandrel,elastic constraint method was used so the mandrel was floated in the piston hole of the oil cylinder,ensuring that the mandrel could swing with movement in the process of double dental disc meshing.The lifting and rotation process of the turntable was no longer affected by the coaxial accuracy of the mandrel,so the dental disc pair was fully self-centering meshed.The accuracy of the turntable was highly consistent with that of the tooth disc pair to ensure the concentricity of the main mechanisms in the working process.The double lead worm was used to eliminate clearance,increase the accuracy and service life of the transmission system.The double tooth disc was used to realize positioning and locking.The minimum division was 1°by the uniform distribution of 360 teeth on the circumference,and the automatic centering was realized by the meshing of convex teeth and concave teeth to ensure the accurate and reliable positioning.The strength check of the tooth disc was done,and the maximum clamping force and load were calculated.A new in-place detection mechanism was designed to detect the position of tooth disc separation and meshing when the turntable worked.Finally,the geometric accuracy was debugged and measured,and the positioning accuracy and repeated positioning accuracy were detected to verify the correctness of the design.

关 键 词：数控转台 牙盘 芯轴 消隙 

分 类 号：TH122[机械工程—机械设计及理论]