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河北亿安精密铸造有限公司
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玛钢扣件的外观质量

2016-11-25

建筑扣件外观质量包括建筑扣件形状、尺寸、表面粗糙度、重量偏差、表面缺陷、色泽、表面硬度和试样断口质量等。建筑扣件外观质量检验通常不需要破坏铸件,借助于必要的两句、样块和测试仪器,用若言货低倍放大镜即可确定口教案的外观质量状况。

对于建筑扣件形状和尺寸的检查,国家标准GB/15831-T1999《建筑扣件尺寸公差与机械加工余量》将毛坯建筑扣件的尺寸公差分为16个等级,表示为CT1-CT16,并给出了不同生产方式和不同铸造工艺方法生产的各种铸造合金的毛坯铸件应能达到的公差级别。其中,该标准为成批和大量生产的毛坯建筑扣件的尺寸公差等级。标准中的术语“建筑扣件基本尺寸”系指机械加工钱毛坯建筑扣件的尺寸,包括必要的机械加工余量;“尺寸公差”系指允许尺寸的变动俩,等于最大机械尺寸与最小极限尺寸之代数差的绝对值,也等于上偏差与下偏差之代数的绝对值

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