Φ3.8×13m水泥磨机筒体焊接工艺分析和工艺设计毕业论文

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1、3.813m 水泥磨机筒体焊接工艺分析和工艺设计 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。 本文主要研究方向是 3.813m 水泥磨机筒体焊接工艺分析和工 艺设计。焊接工艺分析主要是对磨机筒体的材料焊接性、筒体结构、 生产工艺及技术要求进行分析。工艺设计内容主要有备料工艺设计和 焊接工艺设计。备料工艺设计主要包括焊前预处理、切割下料、坡口 加工、钢板弯曲等。焊接工艺设计包括焊接方法选择，焊缝位置

2、和形 状的设计，焊接顺序的设计，焊接检验的确定。 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4 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 Welding Procedure Analysis and Procedure Design for the barrel

3、of 3.813m Cement mill ABSTRACT Cement gr inding machine is cement p lant equip ment, ma inly used in build ing material, metallurgy, electric power and chemical industry, grinding var ious cement c linker and other materials. With C hinas infrastructure development, the demand to cement is more and

4、more strict and the cement production equipment is developing to the large- scale. Especially cement gr inding machine is bigger and bigger. Structures have the new development of the cylinder body welding require ments are also higher. To get the reliab le quality and the good performance of cement

5、 gr ind ing machine , we should analys is weld ing process and to work out the reasonable welding process. What this artic le studies are weld ing process analys is and the weld ing process design for the barrel of 3.813m cement mill. Analys is of welding techno logy are ma inly the analysis of the

6、materals weldability, the analysis of barrel structure process and the analys is of the technical condit ion and production processes. The process design contains t he design of preparation process and weld ing process. The design of welding process contains the selection of welding method, the design of groove, the design of we ld posit ion and shape, the design of welding sequence and the check of weld. Through to the analys is of the cylinder body weld ing process that the wel