刀具的工作角度
<DIV> 刀具工作角度是刀具在工作参考系中定义的一组角度。在切削过程中，由于刀具安装位置和进给因素的影响，使刀具在工作角度（即刀具的实际切削角度）不同于其在静止参考系中的角度。表2-4列出了各种不同影响因素下，车到工作角度的修正计算。 <BR> 刀具几何角度与刃部参数的选择 <BR> 刀具切削部分的几何参数，对切削过程中的金属变形、切削力、切削温度、工件的加工质量都有显著影响。选择合理的刀具几何参数，就是要在保证工件加工质量和刀具经济耐用度的前提下，达到提高生产率、降低生产成本的目的。影响刀具合理几何参数选择的主要因素是工件材料、刀具材料及类型、切削用量、工艺系统钢度以及机床功率等。</DIV><DIV>
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<DIV> 图2-3 外圆车刀刀具角度</DIV>
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<P align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-hansi-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"> 表</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: ˎ̥,Verdana,Arial; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">2-4 </SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-hansi-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">修正计算后的车工工作角度</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: ˎ̥,Verdana,Arial; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体"> <BR> </SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-hansi-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">注：</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: ˎ̥,Verdana,Arial; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">1.pse.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-hansi-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">、</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: ˎ̥,Verdana,Arial; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">pre—</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-hansi-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">工作参数系中的切削平面与基面。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: ˎ̥,Verdana,Arial; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体"> <BR> 2.yoe</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-hansi-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">、</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: ˎ̥,Verdana,Arial; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">aoe—</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-hansi-font-family: ''''''''ˎ̥,Verdana,Arial''''''''; mso-font-kerning: 1.0pt; mso-bidi-font-family: ''''''''Times New Roman''''''''; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">工作前角与工作后角。</SPAN></P></DIV>
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