A methodology for helical mill-grinding of tiny internal threads made of hard brittle materials

A methodology for helical mill-grinding of tiny internal threads made of hard brittle materials
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硬脆材料微小内螺纹螺旋铣削磨削方法

DOI:
10.1007/s00170-016-9727-5
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发表时间:
2017-07
影响因子:
3.4
通讯作者:
Bao Yongjie
Bao Yongjie
中科院分区:
工程技术3区
文献类型:
--
作者:
Gao Hang;Lu Shouxiang;Yang Anqiang;Bao Yongjie

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本研究提出了一种螺旋铣削加工由硬脆材料(如SiCp/Al复合材料)制成的微小内螺纹的方法。该方法采用结合金刚石形砂轮的螺旋铣床磨削方法。建立了预测螺纹形状误差的数学模型,并给出了合理的刀具齿形角变化范围Δαand砂轮直径与螺纹大直径之比η。在此基础上,研制了用于加工M2内螺纹的砂轮,并进行了验证实验。研究表明,以SiC体积分数为45%的SiCp/Al复合材料制成的M2内螺纹在5 min内加工成功,节距误差<0.08%,角度误差<0.3%。螺距直径上的螺纹轮廓在轴向等效公差范围内(0-0.016 mm),表明螺纹精度达到H4级。
This study proposes a methodology for helical mill-grinding of tiny internal threads made of hard brittle materials such as SiCp/Al composites. The methodology uses the helical mill-grinding method incorporating with a diamond form-grinding wheel. A mathematical model is established to predict thread form errors and provide a rational range of wheel parameters, such as variation of tool profile angle Δαand ratio of the wheel diameter to the thread major diameterη. Based on the methodology, a grinding wheel is developed for processing the M2 internal threads in a validation experiment. The study demonstrates that an M2 internal thread made of the SiCp/Al composite of 45% SiC volume fraction is successfully machined in 5 min with pitch error <0.08% and angle error <0.3%. The thread profile on the pitch diameter is within the axial equivalent tolerance zone (0–0.016 mm), which indicates that the thread precision reaches the H4 level.
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发表时间: 2010-01
期刊: The International Journal of Advanced Manufacturing Technology
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