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发明名称
一种无模具加工薄壳拱型外壳的方法
摘要
一种加工薄壳拱型外壳的液压无模具成型工艺,属于压力容器设计和制造领域。一般防爆电器外壳在精加工后,除了进行水压试验,不再进行预应力处理,这样在实际使用中,壳体受到大于试验压力的力作用后会产生影响防爆性能的变形。本发明是在焊接工序后,用超额定检测值的液压力对壳体施压,产生自然的薄壳拱型结构表面,增加壳体强度和刚度,减少工艺过程。
申请公布号
CN1038038A
申请公布日期
1989.12.20
申请号
CN88105414.3
申请日期
1988.05.24
申请人
煤炭科学院南京研究所
发明人
朱秀芝;朱锡生;薛玉专;程学锋;潘树琦
分类号
B21D51/24;B23P25/00
主分类号
B21D51/24
代理机构
代理人
主权项
一种无模具加工薄壳拱型外壳的方法,属于压力容器的设计和制造领域,其特征在于:壳体加工完后,按0.1~0.7kg/cm2·S速率对腔体加压至1.2~1.5倍额定水压试验压力值,保持一段时间后,用脚踏特制的脚踏释压阀按2~3kg/cm2·S减压速率泄压,反复2~7次,最后使压力降至零。
地址
江苏省南京北京西路15-1号
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