数控落地镗铣床主轴滑枕精度补偿与调控

大型数控落地镗铣床作为工业生产制造的基础设备,广泛应用于机械装备加工领域,其主轴滑枕精度对于保证产品加工质量意义重大。针对大型数控落地镗铣床滑枕因自重引起的"低头"变形问题,在进行滑枕工作受力分析和给出变形补偿思路的基础上,通过有限元仿真设计了一套基于电液伺服比例阀的拉力补偿机构,同时基于"PLC-电液伺服比例阀"调控方案设计反馈控制系统,进而实现主轴滑枕精度的补偿和调控。实验数据表明,所提出的补偿调控方案改善了大型落地镗铣床主轴滑枕工作时的"低头"变形情况,显著提高了机床的加工精度。

Precision Compensation and Control for CNC Floor-type Boring and Milling Machine Spindle Ram

As the basic equipment for industrial manufacturing, large CNC floor-type boring and milling machine- shave been widely used in machinery equipment processing area. To solve the countersunk deformation problem of large CNC floor-type boring and milling machines caused by the dead weight of the ram, a set of tension compensation mecha- nism based on electro-hydraulic servo proportional valve is designed to reduce the deformation through finite element sim- ulation analysis and calculation.And a PLC feedback control system is designed for precision compensation and control on CNC floor-type boring and milling machine spindle ram as welt. Experiment data show that the proposed compensation scheme has greatly improved the regulation of bow deformation of large floor boring and milling machine spindle ram at work, and improved the machining accuracy significantly.