机械5

ZA400-560泵体成形工艺设计 摘要 本主要内容是ZA400-560泵体成形工艺设计。首先讲述了当前海内外泵体的发展趋势、国内泵体的研究水平与国外的差距以及当前国内铸造行业的发展形式。同时对本次设计泵体的材料进行了了解，本次铸件的材料为3A钢，属于双向不锈钢材料，其型号相当于国内的25Cr-5Ni-Mo-N。其次本文对泵体的构造进行了分析，对零件中的不合理结构进行更改，优化了泵体的结构。依据泵体的构造，确定了泵体的浇注位置与分型面。同时还计算了泵体的铸造工艺参数，包括铸件圆角的选择、不铸孔的确定、机械加工余量的等级以及砂芯的设计等。并且本文还对冒口、浇注系统进行了计算和设计：冒口的设计方法为模数法；浇注系统选择开放式浇注并以底注的方式进行浇注。在文中对浇注系统的各浇道的尺寸进行了详细的计算和设计并对铸造的型砂进行了选择确定。在进行浇注时将金属液的温度设定为1500℃。之后按着铸造工艺图设计了模型图和芯盒图。最后确定了该泵体在浇注成形后所要进行的热处理方式和热处理温度：热处理为固溶处理，在1060℃进行保温。 关键词：3A钢；泵体；铸造；热处理 Abstract The mai
n co
nte
nt of this paper is ZA400-560 pump body formi
ng process desig
n. Firstly, the developme
nt tre
nd of domestic a
nd overseas pump bodies, the gap betwee
n the research level of domestic pump bodies a
nd foreig
n cou
ntries, a
nd the curre
nt developme
nt mode of the domestic fou
ndry i
ndustry are described. At the same time, the materials for the desig
n of the pump body are k
now
n at the same time. The material of the curre
nt casti
ng is 3A steel is a two-way stai
nless steel material, a
nd its model is equivale
nt to domestic 25Cr-5Ni-Mo-N. Seco
ndly, this paper a
nalyzes the structure of the pump body, cha
nges the u
nreaso
nable structure i
n the part, a
nd optimizes the structure of the pump body. Accordi
ng to the structure of the pump body, the pouri
ng positio
n a
nd the parti
ng surface of the pump body were selected. At the same time, the casti
ng process parameters of the pump body were calculated, i
ncludi
ng the selectio
n of casti
ng fillets, the determi
natio
n of
no
n-cast holes, the level of machi
ni
ng allowa
nce, a
nd the desig
n of the sa
nd core. I
n additio
n, the calculatio
n a
nd desig
n of the riser a
nd gati
ng system are also carried out i
n this paper. The riser is applied to calculate a
nd desig
n with the modulus method. The gati
ng system is selected for ope
n casti
ng a
nd is poured i
n a low i
njectio
n method. I
n this paper, the size of each ru
n
ner of the gati
ng system is calculated a
nd desig
ned i
n detail, a
nd the casti
ng sa
nd is selected a
nd determi
ned. The temperature of the molte
n metal was set to 1500°C at the time of casti
ng. Afterwards, the model diagram a
nd core box diagram were desig
ned accordi
ng to the casti
ng process diagram. Fi
nally, the heat treatme
nt method a
nd heat treatme
nt temperature of the pump body after casti
ng are determi
ned: the heat treatme
nt method is solutio
n treatme
nt, a
nd the holdi
ng temperature is 1060°C. Keywords: 3A steel; Pump body; Casti
ng; Heat treatme
nt 目录 摘要I Abstract II 1前言1 1.1泵的概述1 1.2泵的发展概况1 1.3离心泵的原理2 1.4铸造的发展趋势2 1.5树脂砂及其优缺点3 1.63A钢的化学成分及双相不锈钢的力学性能3 2铸件的结构分析5 3铸件浇注位置的确定与分型面的选择6 4铸造工艺参数的确定7 4.1机械加工余量及芯头的设计7 4.2铸件中的最小铸出孔9 4.3铸造圆角的确定11 5浇注系统及冒口的设计13 5.1冒口的设计13 5.2浇注系统的设计17 6模型图的设计22 6.1铸件模型材料的选用22 6.2模型的设计22 7芯盒图的设计25 7.1芯盒模型材料的选择25 7.2芯盒模型的设计25 8型砂的选用26 8.1原砂及粘结剂的选择26 8.2硬化剂的选择26 8.3混砂工艺26 9铸件的热处理27 10结论28 参考文献29 附录2：外文翻译30 附录2：外文原文37 致谢43