成形铣刀加工、米制螺纹加工、花键加工、平面度和直线度的经济精度
表3-18 成形铣刀加工的经济精度 <TABLE style="WIDTH: 376px; HEIGHT: 130px" cellSpacing=0 cellPadding=0 border=1><TBODY><TR><TD rowSpan=3><DIV align=center>表面长度</DIV></TD><TD colSpan=2><DIV align=center>粗铣</DIV></TD><TD colSpan=3><DIV align=center>精铣</DIV></TD></TR><TR><TD colSpan=5><DIV align=center>铣刀宽度</DIV></TD></TR><TR><TD><DIV align=center>≤120</DIV></TD><TD colSpan=2><DIV align=center>＞120~180</DIV></TD><TD><DIV align=center>≤120</DIV></TD><TD><DIV align=center>＞120~180</DIV></TD></TR><TR><TD><DIV align=center>≤100</DIV></TD><TD><DIV align=center>0.25</DIV></TD><TD colSpan=2><DIV align=center>—</DIV></TD><TD><DIV align=center>0.10</DIV></TD><TD><DIV align=center>—</DIV></TD></TR><TR><TD><DIV align=center>＞100~300</DIV></TD><TD><DIV align=center>0.35</DIV></TD><TD colSpan=2><DIV align=center>0.45</DIV></TD><TD><DIV align=center>0.15</DIV></TD><TD><DIV align=center>0.20</DIV></TD></TR><TR><TD><DIV align=center>＞300~600</DIV></TD><TD><DIV align=center>0.45</DIV></TD><TD colSpan=2><DIV align=center>0.50</DIV></TD><TD><DIV align=center>0.20</DIV></TD><TD><DIV align=center>0.25</DIV></TD></TR><TR height=0><TD width=78></TD><TD width=49></TD><TD width=39></TD><TD width=39></TD><TD width=49></TD><TD width=78></TD></TR></TBODY></TABLE><DIV> 注：指加工表面至基准的尺寸精度。</DIV><DIV> </DIV><DIV> </DIV><DIV> 表3-19 米制螺纹加工的经济精度</DIV><TABLE style="WIDTH: 504px; HEIGHT: 310px" cellSpacing=0 cellPadding=0 width=504 border=1><TBODY><TR><TD width="15%" colSpan=2><DIV align=center>加工方法</DIV></TD><TD width="17%"><DIV align=center>精度等级（GB197—63）</DIV></TD><TD width="16%"><DIV align=center>公差带（GB197—81）</DIV></TD><TD width="16%"><DIV align=center>加工方法</DIV></TD><TD width="17%"><DIV align=center>精度等级（GB197—63）</DIV></TD><TD width="16%"><DIV align=center>公差带（GB197—81）</DIV></TD></TR><TR><TD width="9%" rowSpan=2><DIV align=center>车削</DIV></TD><TD width="6%"><DIV align=center>外螺纹</DIV></TD><TD width="17%"><DIV align=center>1~2</DIV></TD><TD width="16%"><DIV align=center>4h~6h</DIV></TD><TD width="16%" rowSpan=2><DIV align=center>带径向或切向梳刀的自动张开式板牙头</DIV></TD><TD width="17%" rowSpan=2><DIV align=center>2</DIV></TD><TD width="16%" rowSpan=2><DIV align=center>6h</DIV></TD></TR><TR><TD width="6%"><DIV align=center>内螺纹</DIV></TD><TD width="17%"><DIV align=center>2~3</DIV></TD><TD width="16%"><DIV align=center>5H、6H、7H</DIV></TD></TR><TR><TD width="9%" rowSpan=2><DIV align=center>用梳形刀车螺纹</DIV></TD><TD width="6%"><DIV align=center>外螺纹</DIV></TD><TD width="17%"><DIV align=center>1~2</DIV></TD><TD width="16%"><DIV align=center>4h~6h</DIV></TD><TD width="16%" rowSpan=2><DIV align=center>旋风切削</DIV></TD><TD width="17%" rowSpan=2><DIV align=center>2~3</DIV></TD><TD width="16%" rowSpan=2><DIV align=center>6h~8h</DIV></TD></TR><TR><TD width="6%"><DIV align=center>内螺纹</DIV></TD><TD width="17%"><DIV align=center>2~3</DIV></TD><TD width="16%"><DIV align=center>5H、6H、7H</DIV></TD></TR><TR><TD width="15%" colSpan=2><DIV align=center>用丝锥功内螺纹</DIV></TD><TD width="17%"><DIV align=center>1~3</DIV></TD><TD width="16%"><DIV align=center>4H、5H、6H</DIV></TD><TD width="16%"><DIV align=center>搓丝板搓螺纹</DIV></TD><TD width="17%"><DIV align=center>2</DIV></TD><TD width="16%"><DIV align=center>6h</DIV></TD></TR><TR><TD width="15%" colSpan=2><DIV align=center>用圆板牙加工外螺纹</DIV></TD><TD width="17%"><DIV align=center>2~3</DIV></TD><TD width="16%"><DIV align=center>6h~8h</DIV></TD><TD width="16%"><DIV align=center>滚丝板滚螺纹</DIV></TD><TD width="17%"><DIV align=center>1~2</DIV></TD><TD width="16%"><DIV align=center>4h~6h</DIV></TD></TR><TR><TD width="15%" colSpan=2><DIV align=center>带圆梳刀自动张开式板牙</DIV></TD><TD width="17%"><DIV align=center>1~2</DIV></TD><TD width="16%"><DIV align=center>4h~6h</DIV></TD><TD width="16%"><DIV align=center>单线或多线砂轮磨螺纹</DIV></TD><TD width="17%"><DIV align=center>1或更高</DIV></TD><TD width="16%"><DIV align=center>4h以上</DIV></TD></TR><TR><TD width="15%" colSpan=2><DIV align=center>梳形螺纹铣刀</DIV></TD><TD width="17%"><DIV align=center>2~3</DIV></TD><TD width="16%"><DIV align=center>6h~8h</DIV></TD><TD width="16%"><DIV align=center>研磨</DIV></TD><TD width="17%"><DIV align=center>1</DIV></TD><TD width="16%"><DIV align=center>4h</DIV></TD></TR></TBODY></TABLE><DIV> </DIV><DIV> 表2-20 花键加工的经济精度</DIV><TABLE cellSpacing=0 cellPadding=0 border=1><TBODY><TR><TD rowSpan=4><DIV align=center>花键的最大直径</DIV></TD><TD colSpan=5><DIV align=center>轴</DIV></TD><TD colSpan=4><DIV align=center>轧</DIV></TD></TR><TR><TD colSpan=3><DIV align=center>用磨制的滚铣刀</DIV></TD><TD colSpan=2><DIV align=center>成形磨</DIV></TD><TD colSpan=2><DIV align=center>拉削</DIV></TD><TD colSpan=2><DIV align=center>推削</DIV></TD></TR><TR><TD colSpan=5><DIV align=center>精度</DIV></TD><TD colSpan=4><DIV align=center>热处理前精度</DIV></TD></TR><TR><TD><DIV align=center>花键宽</DIV></TD><TD><DIV align=center>底圆直径</DIV></TD><TD colSpan=2><DIV align=center>花键宽</DIV></TD><TD><DIV align=center>底圆直径</DIV></TD><TD><DIV align=center>花键宽</DIV></TD><TD><DIV align=center>底圆直径</DIV></TD><TD><DIV align=center>花键宽</DIV></TD><TD><DIV align=center>底圆直径</DIV></TD></TR><TR><TD><DIV align=center>18~30</DIV></TD><TD><DIV align=center>0.025</DIV></TD><TD><DIV align=center>0.05</DIV></TD><TD colSpan=2><DIV align=center>0.031</DIV></TD><TD><DIV align=center>0.027</DIV></TD><TD><DIV align=center>0.013</DIV></TD><TD><DIV align=center>0.018</DIV></TD><TD><DIV align=center>0.008</DIV></TD><TD><DIV align=center>0.012</DIV></TD></TR><TR><TD><DIV align=center>30~50</DIV></TD><TD><DIV align=center>0.040</DIV></TD><TD><DIV align=center>0.075</DIV></TD><TD colSpan=2><DIV align=center>0.015</DIV></TD><TD><DIV align=center>0.032</DIV></TD><TD><DIV align=center>0.016</DIV></TD><TD><DIV align=center>0.026</DIV></TD><TD><DIV align=center>0.009</DIV></TD><TD><DIV align=center>0.015</DIV></TD></TR><TR><TD><DIV align=center>50~80</DIV></TD><TD><DIV align=center>0.050</DIV></TD><TD><DIV align=center>0.10</DIV></TD><TD colSpan=2><DIV align=center>0.017</DIV></TD><TD><DIV align=center>0.042</DIV></TD><TD><DIV align=center>0.016</DIV></TD><TD><DIV align=center>0.030</DIV></TD><TD><DIV align=center>0.012</DIV></TD><TD><DIV align=center>0.019</DIV></TD></TR><TR><TD><DIV align=center>80~120</DIV></TD><TD><DIV align=center>0.075</DIV></TD><TD><DIV align=center>0.125</DIV></TD><TD colSpan=2><DIV align=center>0.019</DIV></TD><TD><DIV align=center>0.045</DIV></TD><TD><DIV align=center>0.019</DIV></TD><TD><DIV align=center>0.035</DIV></TD><TD><DIV align=center>0.012</DIV></TD><TD><DIV align=center>0.023</DIV></TD></TR><TR height=0><TD width=112></TD><TD width=56></TD><TD width=70></TD><TD width=28></TD><TD width=28></TD><TD width=70></TD><TD width=56></TD><TD width=70></TD><TD width=56></TD><TD width=70></TD></TR></TBODY></TABLE><DIV> </DIV><DIV> 表3-21 平面度和直线度的经济精度</DIV><TABLE cellSpacing=0 cellPadding=0 width="100%" border=1><TBODY><TR><TD width="37%"><DIV align=center>加工方法</DIV></TD><TD width="10%"><DIV align=center>公差等级</DIV></TD><TD width="40%"><DIV align=center>加工方法</DIV></TD><TD width="11%"><DIV align=center>公差等级</DIV></TD></TR><TR><TD width="37%"><DIV align=center>研磨、精密磨、精刮研磨、精磨、刮磨、刮、精车</DIV></TD><TD width="10%"><DIV align=center>1~2</DIV><DIV align=center>3~4</DIV><DIV align=center>5~6</DIV></TD><TD width="40%"><DIV align=center>粗磨、铣、刨、拉、车、铣、刨、车、插、各种粗加工</DIV></TD><TD width="11%"><DIV align=center>7~8</DIV><DIV align=center>9~10</DIV><DIV align=center>11~12</DIV></TD></TR></TBODY></TABLE>
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