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捷克7CD型磨床主要用于加工曲轴,也可作纵向磨削外圆。但由于工作台低速运动时存在爬行和不能自动换向,所以不能满足纵向磨削外圆的要求。为了提高机床的性能,扩大其使用范围,我们针对存在的问题采取了一些改善性维修措施,使工作台运动速度在35mm/min时换向平稳。一、液压操纵箱工作原理 1.工作台往复运动如图1,当先导阀A右移,使油口1接通7,压力油1→7→阀B小孔→阀B左端,阀B右端回油经3→12→油箱,实现阀B第一次快跳,对工作台进行制动。
Czech 7CD grinder is mainly used for processing crankshaft, but also for longitudinal grinding cylindrical. However, due to table crawling low speed movement and can not be automatically reversed, it can not meet the requirements of longitudinal grinding cylindrical. In order to improve the performance of the machine tool and expand the scope of its use, we have taken some corrective measures to solve the existing problems and made the worktable move steadily at a speed of 35mm / min. First, the working principle of the hydraulic control box 1. Workbench reciprocating Figure 1, when the pilot valve A right shift, the port 1 connected 7, the pressure oil 1 → 7 → B small hole → valve B left, right B valve Back to the oil by 3 → 12 → tank, the valve B to achieve the first jump, the table for braking.