焊接专业毕业设计说明书论文.doc

毕 业 设 计 摘 要 本次设计的加热槽槽体是加热及搅拌沥青的专用容器。以通入夹套中的高温蒸气为热源加热沥青。设计产品普遍应用于石油化学工业、建筑业等行业上。该设计中详细制定了加热槽的制作工艺和封头冲压模具的设计。 根据压力容器的标准，此加热槽属于II类压力容器。其设计、制造、检验和验收应符合GB150－98《钢制压力容器》的规定。16MnR钢是制造压力容器的专用钢。16MnR的硫、磷含量低，抗拉强度、延伸率、冲击韧性高。因此，16MnR的力学性能和工艺性能良好。除环境温度很低或钢板厚度很大时，冷裂纹倾向较大以外，不易产生其它种类的裂纹。Q235B钢的含碳量低，虽然强度不高，但塑性和冲击韧性很好，焊接性优良。一般不会因焊接而出现严重的淬硬组织。 通过分析母材的各种性能及本产品的结构特点，编制出适合本产品的生产工艺流程。主要是筒节、封头的加工工艺及加热槽槽体的总装配焊接工艺。制定下料及其成形工艺，填写零件加工工艺过程卡；制定装配工艺及焊接工艺，填写焊接工艺卡；制定焊后加工工艺。制定夹套的翻边、翻孔工艺。在制作封头时，还需根据封头的尺寸计算出封头冲压模具上模及下模的具体尺寸，制作冲压模具。结合本产品的技术要求，采用无损探伤和水压试验进行检验。最后，为了防止产品生锈需对产品进行涂漆。 关键词： 加热槽； 焊接工艺； 夹套； 冲压模具 Abstract The heating trough body of this time design is the appropriation container which heats and mixes blend the asphalt. Take passes over in the clamp cover the high temperature steam to heat up the asphalt as the heat source. The design product generally applies to profession and soon in petrochemical industry, architecture industry…etc. In this design in detail formulated to the manufacture craft of the heating trough and the design of the head of the trough ramming mold. According to the standard of pressure container, this heating trough is belonged to II kind of pressure container. Its design, manufacturing, examination and acceptance should conform to the provision of GB150－98《Steels system pressure containers》.The 16MnR steel is the appropriation steel which makes pressure container. The content of sulfur, phosphorus in 16MnR is low, the tensile strength, the elongation ratio and pounds at tenacity are high. Therefore, mechanics function and craft function with 16MnR are good. In addition to the environment temperature is very low or when the steel plate thickness is very big, greatly outside the cold crack is easy to creation, dont easily creation other categories crack. The Q235 B steel contains amount of carbon low, although the strength isnt high, plasticity and resilience are very good and the weldability is fine. Generally will not appears the serious hard organization because of weld.