薄壁轴承因其结构轻巧的优点而得到广泛应用,高硬度,和强大的承载能力。然而,薄壁轴承在加工过程中往往容易变形,会严重影响轴承的性能。此外,轴承的加工变形和质量难以平衡。为了解决上述问题,本文研究了加工参数对加工变形的影响,表面质量,薄壁轴承在粗加工阶段的加工效率。研究了粗磨中变形抑制与高质量之间的动态平衡,得到了薄壁轴承外圈磨削的最优参数。通过仿真和实验分析揭示了薄壁轴承磨削变形的机理。结果表明,当工件速度为55r/min时,加工变形与质量达到平衡,砂轮转速为2000r/min,进料速率为0.1mm/min。变形随工件速度和砂轮速度的增加而增加。同时,表面粗糙度随着工件速度的增加而增加,但是车轮速度的增加会改善表面粗糙度。随着工件速度的增加,表面形貌显示出更明显的材料储备,通过增加砂轮速度来改善。随着工件旋转速度的增加,每单位时间内过程中涉及的磨粒数量减少,工件的表面去除效果较差,而砂轮旋转速度的增加具有相反的效果。薄壁轴承的磨削变形主要是由加工热和应力引起的。随着转速的增加,在研磨区的热通量增加。更多的热通量流入工件表面,导致轴承套环内表面上的热应力增加,导致更大的变形。磨削区域的温度可以在加工过程中降低,实现变形的减少。研究内容有助于在加工过程中实现高质量和低变形之间的平衡。
Thin-walled bearings are widely used owing to the advantages of their light structure, high hardness, and strong load-carrying capacity. However, thin-walled bearings are often prone to deformation during the machining process, which can seriously affect the performance of the bearings. In addition, the machining deformation and quality of bearings are difficult to balance. To address the above issues, this paper investigates the effects of the machining parameters on the machining deformation, surface quality, and machining efficiency of a thin-walled bearing during the roughing stage. The dynamic balance between deformation inhibition and high quality in rough
grinding was studied, and the optimal parameters for thin-walled bearing outer ring
grinding were obtained. The deformation mechanism of thin-walled bearings caused by grinding was revealed through simulation and experimental analysis. The results show that the machining deformation and quality reach a balance when the workpiece speed is 55 r/min, the grinding wheel rotational speed is 2000 r/min, and the feed rate is 0.1 mm/min. Deformation increases with the increase in workpiece speed and
grinding wheel speed. At the same time, the surface roughness increases with the increase in the workpiece speed, but the increase in the wheel speed will improve the surface roughness. As the workpiece speed increases, the surface topography shows a more pronounced stockpile of material, which is ameliorated by an increase in grinding wheel speed. As the rotational speed of the workpiece increases, the number of abrasive grains involved in the process per unit of time decreases, and the surface removal of the workpiece is less effective, while the increase in the rotational speed of the grinding wheel has the opposite effect. The
grinding deformation of thin-walled bearings is mainly induced by machining heat and stress. As the rotational speed increases, the heat flux in the
grinding zone increases. More heat flux flows into the surface of the workpiece, causing an increase in thermal stresses on the inner surface of the bearing collar, leading to greater deformation. The temperature in the grinding area can be reduced during machining, realizing a reduction in deformation. The research content contributes to the balance between high quality and low distortion in machining processes.