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有序排布砂轮磨削加工BK7玻璃试验研究
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Experimental Study on Grinding of BK7 Glass by Orderly Arrangement Grinding Wheel
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    摘要:

    考虑磨削过程中任意相邻磨粒之间的相互作用,针对单颗磨粒进行有序排布研究,提出一种能够控制任意两颗磨粒间距的有序排布策略.经过排布后的每颗磨粒作为单独切削刃,在工件表面先后切除材料后形成沟痕.根据排布策略设计3种排布方式,任意相邻磨粒间距分别为-50 μm、0 μm、50 μm,利用电化学阳极溶解在砂轮基体表面制备排布模板,上砂电镀加厚制备相应的有序排布砂轮.采用磨削运动学方法,分析磨削中的磨削力和磨削温度变化情况,通过磨削试验测量实际磨削中磨削力和磨削温度并进行分析. 结果表明,磨削力与进给速度呈正相关,磨削温度与进给速度呈负相关. 磨削深度和磨粒排布间距综合影响温度和磨削力的变化,当磨粒间距较小时,随磨削深度的增加,磨削温度和磨削力稳步升高;当磨粒间距较大时,随磨削深度增加,两者先稳步升高,后缓慢升高.

    Abstract:

    Considering the interaction between any adjacent abrasive grains during the grinding process, the orderly arrangement of a single abrasive grain is studied, and an orderly arrangement strategy that can control the spacing of any two abrasive grains is proposed. After arrangement, each abrasive grain acts as a separate cutting edge on the surface of the workpiece, and the material is cut off successively to form grooves. According to the arrangement strategy, three arrangement methods are designed. The spacing of any adjacent abrasive grains is -50 μm, 0 μm, and 50 μm, respectively, the arrangement template is prepared by electrochemical anode dissolution on the surface of the grinding wheel matrix, and the corresponding orderly arrangement of the grinding wheel is prepared by sanding electroplating, and thickening. At the same time, the grinding force and grinding temperature changes in grinding are calculated by grinding kinematic analysis, and the grinding force and grinding temperature in actual grinding are measured and analyzed by grinding experiment. The results show that under this test condition, the influence of feed speed on both is relatively independent: the grinding force is positively correlated with the feed speed, while the grinding temperature is negatively correlated with the feed speed. The grinding depth and the abrasive grain arrangement spacing comprehensively affect the changes in temperature and grinding force. When the abrasive spacing is small, the grinding temperature and force increase steadily with the increase of grinding depth; When the abrasive grain spacing is large, as the grinding depth increases, the two increase steadily and then slowly.

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卜颖滨 ,万珍平 ?,成雨.有序排布砂轮磨削加工BK7玻璃试验研究[J].湖南大学学报:自然科学版,2024,(4):54~63

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  • 在线发布日期: 2024-04-22
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