目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc296079556"1绪论PAGEREF_Toc296079556\h1HYPERLINK\l"_Toc296079557"1.1课题背景和研究意义PAGEREF_Toc296079557\h1HYPERLINK\l"_Toc296079558"1.2国内外抛砂造型的发展状况PAGEREF_Toc296079558\h1HYPERLINK\l"_Toc296079559"1.3抛砂机的分类PAGEREF_Toc296079559\h2HYPERLINK\l"_Toc296079560"1.4抛砂机的优缺点PAGEREF_Toc296079560\h2HYPERLINK\l"_Toc296079561"2结构方案的确定PAGEREF_Toc296079561\h3HYPERLINK\l"_Toc296079562"2.1整体结构方案的确定PAGEREF_Toc296079562\h3HYPERLINK\l"_Toc296079563"2.1.1确定生产率PAGEREF_Toc296079563\h3HYPERLINK\l"_Toc296079564"2.1.2抛砂机组成概述PAGEREF_Toc296079564\h3HYPERLINK\l"_Toc296079565"2.2抛砂头形式方案确定PAGEREF_Toc296079565\h3HYPERLINK\l"_Toc296079566"2.3小臂结构的确定PAGEREF_Toc296079566\h5HYPERLINK\l"_Toc296079567"2.3.1小臂梁PAGEREF_Toc296079567\h5HYPERLINK\l"_Toc296079568"2.3.2小臂输送带PAGEREF_Toc296079568\h5HYPERLINK\l"_Toc296079569"2.4大臂结构的确定PAGEREF_Toc296079569\h6HYPERLINK\l"_Toc296079570"2.4.1大臂四杆机构PAGEREF_Toc296079570\h6HYPERLINK\l"_Toc296079571"2.4.2升降油缸PAGEREF_Toc296079571\h7HYPERLINK\l"_Toc296079572"2.4.3大臂输送带PAGEREF_Toc296079572\h7HYPERLINK\l"_Toc296079573"2.5大小臂转速的确定PAGEREF_Toc296079573\h7HYPERLINK\l"_Toc296079574"3抛砂头设计PAGEREF_Toc296079574\h9HYPERLINK\l"_Toc296079575"3.1抛砂头参数的选择PAGEREF_Toc296079575\h9HYPERLINK\l"_Toc296079576"3.1.1生产率PAGEREF_Toc296079576\h9HYPERLINK\l"_Toc296079577"3.1.2砂团抛出的绝对速度PAGEREF_Toc296079577\h9HYPERLINK\l"_Toc296079578"3.1.3叶片的后倾角PAGEREF_Toc296079578\h10HYPERLINK\l"_Toc296079579"3.1.4砂团抛出时的圆周速度PAGEREF_Toc296079579\h10HYPERLINK\l"_Toc296079580"3.1.5叶片的半径与转速PAGEREF_Toc296079580\h10HYPERLINK\l"_Toc296079581"3.1.6叶片数PAGEREF_Toc296079581\h10HYPERLINK\l"_Toc296079582"3.1.7叶片宽度PAGEREF_Toc296079582\h10HYPERLINK\l"_Toc296079583"3.1.8叶片形状PAGEREF_Toc296079583\h11HYPERLINK\l"_Toc296079584"3.1.9进砂速度PAGEREF_Toc296079584\h11HYPERLINK\l"_Toc29607