In this paper, the variation characteristic of the drilling force, and the influences of cutting speed, feed rate, and workpiece thickness on the drilling force, were evaluated when drilling a silicon carbide particle reinforced aluminum matrix (SiCp/Al) composite thin-walled workpiece with a high volume fraction. Under the condition that the workpiece thickness was less than the drill tip height, three characteristic stages of drilling force variation were proposed. The results indicate that there is a significant difference between the variations in the drilling force when drilling a thin-walled workpiece compared to thick-walled workpiece. When the chisel edge drills out the lower surface of the workpiece, there is an abrupt decrease in the thrust forces of the thin-walled and thick-walled workpieces. In addition, there is an abrupt decrease in the torque of the thick-walled workpiece, whereas that of the thin-walled workpiece increases. According to the thickness of the thin-walled workpiece, the instant of the abrupt decrease in the thrust force may lead or lag behind the theoretical instant at which the chisel edge reaches the lower surface of the workpiece without deformation. When drilling a thin-walled hole, the cutting speed has a slight influence on the thrust force, and there is a slight increase in the torque in accordance with an increase in the cutting speed. The thrust force and torque increase in accordance with an increase in the feed rate. When drilling a thin-walled workpiece with a thickness of 1 mm, the critical thickness of workpiece cracking decreases in accordance with an increase in the cutting speed, and increases in accordance with an increase in the feed rate. When drilling a thin-walled workpiece with a thickness of 0.5 mm, the concave deformation of the workpiece and the critical thickness of the workpiece cracking increase in accordance with an increase in the feed rate. However, the increment in the critical thickness of the workpiece cracking is less than that in the concave deformation of the workpiece.

中文翻译：

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SiCp / Al复合薄壁工件的钻削力变化特征及切削参数的影响

本文在钻削碳化硅颗粒增强铝基复合材料薄壁材料时，评估了钻削力的变化特性，以及切削速度，进给速度和工件厚度对钻削力的影响。体积分数高的工件。在工件厚度小于钻头高度的条件下，提出了钻削力变化的三个特征阶段。结果表明，与厚壁工件相比，在钻削薄壁工件时钻孔力的变化之间存在显着差异。当凿边缘钻出工件的下表面时，薄壁和厚壁工件的推力会突然减小。此外，厚壁工件的扭矩突然减小，而薄壁工件的扭矩增大。根据薄壁工件的厚度，推力突然减小的瞬间可能会领先或滞后于理论瞬间，在该瞬间，凿子边缘到达工件的下表面而不会变形。当钻薄壁孔时，切削速度对推力有轻微的影响，并且随着切削速度的增加，扭矩也有轻微的增加。推力和转矩随着进给速度的增加而增加。在钻削厚度为1 mm的薄壁工件时，工件开裂的临界厚度会随着切削速度的增加而降低，并且随着进给速度的增加而增加。当钻削厚度为0.5 mm的薄壁工件时，随着进给速度的增加，工件的凹形变形和工件裂纹的临界厚度也会增加。但是，工件裂纹的临界厚度的增量小于工件的凹形变形的临界厚度的增量。