【摘要】：為了研究磨削力與磨削熱耦合作用的殘余應(yīng)力場,基于磨粒軌跡分析和磨粒接觸分析,采用概率統(tǒng)計(jì)的方法建立了磨削弧區(qū)熱源分布模型。模型分析了磨削弧區(qū)熱量分配關(guān)系,不需預(yù)先假設(shè)沿磨削弧總熱源分布形狀及熱量分配比一致,即可獲得磨削弧區(qū)熱源分布形狀,解決了以往熱源分布形狀常被假設(shè)為矩形和直角三角形,但矩形熱源和直角三角形熱源并不能準(zhǔn)確地描述熱源分布形狀的問題。采用有限元法仿真分析了工件磨削溫度場,采用熱成像儀實(shí)測了磨削溫度場,并將磨削溫度場有限元仿真結(jié)果和熱成像儀測量結(jié)果進(jìn)行了對(duì)比分析,結(jié)果表明:有限元模擬結(jié)果與熱成像儀測量結(jié)果具有很好的一致性,磨削弧區(qū)最高溫度預(yù)測值與實(shí)測值之間的誤差在2.24%~15.3%范圍內(nèi);直角三角形熱源并不能準(zhǔn)確地描述磨削弧區(qū)熱源分布形狀;磨削弧區(qū)熱源分布形狀更接近四次多項(xiàng)式函數(shù)曲線。
[Abstract]:In order to study the residual stress field of the interaction between grinding force and grinding heat, the distribution model of heat source in grinding arc region was established based on abrasive particle trajectory analysis and abrasive particle contact analysis. The model analyzes the relationship of heat distribution in grinding arc region. The shape of heat source distribution in grinding arc region can be obtained without presupposing that the shape of total heat source distribution along grinding arc and the heat distribution ratio are the same. It solves the problem that the shape of heat source distribution is usually assumed to be rectangular and right triangle, but the rectangular heat source and right triangle heat source can not accurately describe the shape of heat source distribution. The grinding temperature field of workpiece is simulated by finite element method, the grinding temperature field is measured by thermal imager, and the results of finite element simulation and thermal imager are compared and analyzed. The results show that the finite element simulation results are in good agreement with the results measured by the thermal imager, and the error between the predicted value of the highest temperature in grinding arc region and the measured value is within the range of 2.24% and 15.3%. Right triangle heat source can not accurately describe the shape of heat source distribution in grinding arc region, and the shape of heat source distribution in grinding arc region is closer to the curve of cubic polynomial function.
【作者單位】： 山東大學(xué)機(jī)械工程學(xué)院;山東大學(xué)高效潔凈機(jī)械制造教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家“973計(jì)劃”資助項(xiàng)目(2011CB706600)
【分類號(hào)】：TG580.1

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