提出了一種新型的非圓軸數控加工系統，用于橫截面為非圓形狀的軸類零件加工。在由凸輪驅動機械式微進給機構的基礎上，利用仿射變換構建了一種新型的極坐標插補算法，可實現任意非圓軸的加工成形。與其他同類系統相比，該系統具有切削力大、精度高、柔性好等優點。
關 鍵 詞 數控; 活塞; 中凸變橢圓; 非圓加工; 微進給機構; 插補

Abstract A new kind of NC system for machining shafts with non-circular cross-section is proposed in this paper. On the basis of a special micro-feed mechanism, which is driven by a simple cam, a new polar coordinate interpolation algorithm, which is based on affine transformation, is presented. By this method, shafts with any non-circular cross-section can be machined. Comparing with other similar systems, it possesses such advantages as: larger cutting force, better flexibility and higher precision et al.
Key words numeric control; piston; convex and vari-elliptical; non-circular cross-section; micro-feed mechanism; interpolation