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本文通过分析磨削时工件表层温度的变化规律以及热电偶的动态响应能力,对高泽所推荐的单丝热电偶动态测温方案的可靠性进行了论证,并在此基础上提供了有关平磨钛合金与45~#钢时的磨削力与工件表层内部温度分布的实测数据。文章在根据实测结果对钛合金与45~#钢的磨削性的几个方面定量地进行了综合分析以后指出,在实验所采用的磨削条件下,钛合金试件表面峰值温度与45~#钢相比偏高并不明显。但是两者磨削比却相差近45倍。此情况说明通常推测的磨削区高温并非TC—4难磨的根源,钛合金难磨的本质原因是它与磨料之间的激烈的化学亲和作用。因此深入研究这种化学亲和的机理,通过优选新型磨料、磨削液以及最佳磨削速度尽可能地去抑制这种化学亲和作用,应该是从根本上改善钛合金磨削性的关键。
In this paper, by analyzing the variation law of workpiece surface temperature during grinding and the dynamic response capability of thermocouple, the reliability of the thermocouple dynamic temperature measurement scheme proposed by Koze was demonstrated. Based on this, Grinding force of titanium alloy and 45 ~ # steel and the surface temperature distribution of the workpiece measured data. Based on the measured results on the grinding of titanium and 45 ~ # steel quantitatively conducted a comprehensive analysis of a few later pointed out that the grinding conditions used in the experiment, the titanium alloy specimen peak surface temperature and 45 ~ # Steel is not obvious compared to high. However, the difference between the two grinding is almost 45 times. This situation indicates that it is generally speculated that the high temperature in the grinding zone is not the root cause of TC-4 hard grinding. The essence of titanium alloy grinding is its intense chemical affinity with the abrasive. Therefore, in-depth study of this mechanism of chemical affinity, by optimizing the new abrasive, grinding fluid and the best grinding speed as much as possible to inhibit this chemical affinity, should fundamentally improve the grinding of titanium alloy key .