The authors describe the constituent of hydraulic control system and the design of PLC software for some large roller hearth furnace with PLCs as its control centre for annealing bearing races.

• 叙述了某大型辊底式炉在轴承套圈余热退火过程中，采用可编程控制器（PLC）作为控制核心，自动进行工作的机械液压传动控制系统的组成、PLC软件设计及编制。