<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 48pt; TEXT-INDENT: -48pt; mso-char-indent-count: -4.0;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 16.0pt;">铸造</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 14.0pt;">——将液态金属浇注到铸型型腔中,待其冷却凝固后,获得一定形状的毛坯或零件的方法。</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 16.0pt;">铸造生产的特点:</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">优点</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 14.0pt;">——零件的形状复杂;工艺灵活;成本较低。</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 14.0pt;">缺点——机械性能较低;精度低;效率低;劳动条件差。</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 14.0pt;">分类:</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 14.0pt;">砂型铸造<span lang="EN-US">——90%</span>以上</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 14.0pt;">特种铸造<span lang="EN-US">——</span>铸件性能较好,精度低,效率高</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;"><p></p></span></p><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 14.0pt;">我国铸造技术历史悠久,早在三千多年前,青铜器已有应用;二千五百年前,铸铁工具已经相当普遍。泥型、金属型和失蜡型是我国创造的三大铸造技术。</span> |