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在锅炉,石化设备压力容器制造中,对于中小直径规格封头则可根据本厂设备能力来决定制造工艺方案,当所压制封头的展开坯料直径大于压力机工作台空间尺寸时(宽度),就要采取分片冲压而后拼焊制成封头,其质量必须符合JB741—80《钢制焊接压力容器技术条件》的要求。另一方面,对于压模结构形式.材料选择,也是一个关键环节。为使模具经常重复使用且不形变,达到经久耐用的要求,我厂已设计研制出“铸制热压横具”,所冲压成形的封头质量完全符
In the boiler, petrochemical equipment pressure vessel manufacturing, for small and medium diameter specifications of the head can be based on the plant capacity to determine the manufacturing process plan, when the pressure of the development of the first blank billet diameter greater than the table size (width), on the table To take a piece of stamping and then welded into the head, the quality must meet JB741-80 “steel welding pressure vessel technical conditions” requirements. On the other hand, material selection is also a key aspect of the die structure. To make the mold often reused and not deformed, to meet the requirements of durable, I have designed the plant developed a “hot pressing cross-casting”, the quality of the stamp-forming head completely