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Electric ball valve ball processing and technical requirements
The author: Time:2020/4/14

        电动球阀的关闭件是球体。从结构上看,有带支撑轴和不带支撑轴的两种。两种球体中间都有通孔。根据球阀的用途。球体分别用铸铁、碳素钢、不锈钢及非金属材料制成。铸铁球体均采用铸件毛坯,钢制球体小尺寸的可用棒材直接加工,其余大部分采用锻件毛坯。
        球体的主要技术要求,带支撑轴的球体有配合部位的精度为11级,球体的精度一般为9~11级,球体的圆度不大于0.02~0.10mm。两头轴颈对球体的同轴度不大于规定值。球体圆弧槽的两侧面对轴线的对称度不大于规定值。a型球体的球面是主要加工表面。加工顺序是先按工艺要求车出通孔,再以通孔为定位基准加工球面。b型球体除球面外,还有精度较高的外圆柱面。这些加工表面可采用顶孔为定位基准进行加工。由于这种球体的通孔垂直于两端轴颈轴线,加工球面时有一定困难,所以在加工过程中领采取必要的措施。以保证质量。

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