机械通用部分安全检查--杨远锋的博客

机械通用部分安全检查

[ 2011-9-6 8:50:00 | By: 杨远锋 ]

1、紧固件
1）螺纹连接件和锁紧件必须齐全、牢固可靠。螺栓头部和螺母应预防其出现铲伤、棱角严重变形。螺孔乱扣、滑扣时，允许扩孔，增大螺栓直径，但不能因扩孔而影响被扩工件的机械强度和工作性能。
2）螺母必须拧紧，拧紧后螺栓的螺纹应露出螺母1～3个螺距，不得在螺母下加多余的垫圈来减少螺栓露出长度。
3）螺栓不得弯曲，螺纹损伤不得超过螺纹工作高度的1/2，且连续不得超过一周。连接件螺栓的螺纹旋入孔内长度不得小于螺纹直径的1.5倍。沉头螺栓拧紧后，沉头部分不得凸出连接件的表面。
4）螺纹表面必须光洁，不得用粗制螺纹代替精制螺纹。
5）同一部位的紧固件规格必须一致，材质必须满足设计要求。主要连接部位或受冲击载荷容易松动部位的螺母，必须使用防松螺母或其它防松方法。
6）使用花螺母时，开口销应符合要求。使用止动垫圈时，包角应稳固；使用铁丝锁紧时，其拉紧方向必须和螺栓方向一致，接头应向内弯曲。
7）弹簧垫圈应有足够的弹性（自由状态开口重叠部分不得大于垫圈厚度的1/2）。
8）螺栓头部或螺母必须和相接触的部件紧贴。如该处为斜面时，应加相同斜度的斜垫。
9）铆钉必须不生锈，不变形，紧固有效，铆接对口不得有错动痕迹。
10）稳钉和稳钉孔相吻合，不松旷。

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原创

[ 2016-9-6 21:46:06 | By: 原创(游客) ]

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原创

[ 2016-9-28 21:20:37 | By: 原创(游客) ]

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原创

[ 2016-9-30 16:03:44 | By: 原创(游客) ]

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Re:在漫画中识别身边的违章

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Re:在漫画中识别身边的违章

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Re:在漫画中识别身边的违章

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