提出了一種新型的非圓軸數(shù)控加工系統(tǒng)，用于橫截面為非圓形狀的軸類零件加工。在由凸輪驅(qū)動機(jī)械式微進(jìn)給機(jī)構(gòu)的基礎(chǔ)上，利用仿射變換構(gòu)建了一種新型的極坐標(biāo)插補(bǔ)算法，可實(shí)現(xiàn)任意非圓軸的加工成形。與其他同類系統(tǒng)相比，該系統(tǒng)具有切削力大、精度高、柔性好等優(yōu)點(diǎn)。
關(guān) 鍵 詞 數(shù)控; 活塞; 中凸變橢圓; 非圓加工; 微進(jìn)給機(jī)構(gòu); 插補(bǔ)

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