筒体焊接工艺分析.doc

筒体焊接工艺分析
摘要
水泥磨机是水泥厂设备,主要用于建材、冶金、电力及化工行业,粉磨各种水泥熟料及其它物料。随着我国基础建设的不断发展,水泥需求量越来越大,水泥生产设备向大型化发展,特别是水泥磨机越做越大,结构也有了新的发展,对筒体的焊接要求也更高。
通过对筒体焊接工艺的分析可知在焊接过程中宜采用分部件焊接的装配顺序,焊接方法采用埋弧自动焊,筒体材料选取低碳钢Q235C,焊材选用φ4的H08A的焊丝与HJ431焊剂匹配。焊接过程中对环焊缝采用米字型支撑梁刚性固定以及对连续的环焊缝采取两段对称施焊的方法来控制变形,对于纵焊缝可以采用预变形法控制变形。焊后焊缝整体在580~620℃回火消除焊接残余应力。
关键词:水泥磨机,筒体,焊接,工艺分析,工艺设计
I
Welding Procedure Analysis and Procedure Design for the barrel of ×13m Cement mill
ABSTRACT
Cement grinding machine is cement plant equipment, mainly used in building material, metallurgy, electric power and chemical industry, grinding various cement clinker and other materials. With China's infrastructure development, the demand to cement is more and more strict and the cement
production equipment is developing to the large-scale. Especially cement grinding machine is bigger and bigger. Structures have the new development of the cylinder body welding requirements are also higher. To get the reliable quality and the good performance of cement grinding machine, we should analysis welding process and to work out the reasonable welding process.
What this article studies are welding process analysis and the welding process design for the barrel of ×13m cement mill. Analysis of welding technology are mainly the analysis of the materal’s weldability, the analysis of barrel structure process and the analysis of the technical condition and production processes. The process design contains the design of preparation process and welding process. The design of welding process contains the selection of welding method, the design of groove, the design of weld position and shape, the design of welding sequence and the check of weld.
Through to the analysis of the cylinder body welding process that the welding process of appropriate the whole assembly-welding assembly sequence, welding method adopts automatic submerged arc welding, welding material selection of
II
φ 4 H08A welding wire and HJ431 flux. Welding process t