焊接专业毕业论文(2)

武汉工程职业技术学院冶金系毕业论文

目 录

摘 要····································· 1 前 言····································· 2 1 单面焊双面成形技术的概念 ···························2 单面焊双面成形常见的焊接缺陷 ·························2.1 尺寸上的缺陷 ·······························2.2 结构上的缺陷 ·······························2.3 性质上的缺陷 ·······························3 单面焊双面成形质量差引起的问题 ························3.1 增加消耗，降低结构的质量和使用寿命 ····················3.2 焊接缺陷会给结构的安全生产带来威胁，引起安全事故 ·············4 单面焊双面成形焊接质量差的原因分析 ······················4.1 焊接电源自身因素引起的焊接质量差 ·····················4.2 工艺因素对单面焊双面成形焊接质量的影响 ··················4.2.1 焊接电流 ·······························4.2.2 焊接速度 ·······························4.2.3 电弧电压 ·······························4.2.4 焊接层数选择不当 ···························4.2.5 焊条类形及焊条直径的影响 ·······················4.3 操作因素 ·································5 防止单面焊双面成形焊接产生焊接缺陷的措施 ···················5.1 作好焊前准备 ·······························5.2 焊接操作 ·································5.2.1 选择合适的工艺参数 ··························5.2.2 焊工技术水平 ·····························结 论 ·····································参考文献····································谢 辞·····································

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