Lathing method for stepped labyrinth seal made of powder high-temperature alloy

The invention discloses a lathing method for a stepped labyrinth seal made of a powder high-temperature alloy for machining a first labyrinth seal and a second labyrinth seal at different outer diameters. The method comprises the following steps of S1, roughly turning the first labyrinth seal, wherein a margin is left and layered cutting is used during rough turning and a one-way tool feeding modewhen each layer is cut is adopted; S2, roughly turning the second labyrinth seal, wherein a margin is left and layered cutting is used during rough turning and a one-way tool feeding mode when each layer is cut is adopted; S3, performing finish turning of right-semi-side profiles of the first and second labyrinth seals; and S4, performing finish turning of left-semi-side profiles of the first andsecond labyrinth seals. According to the invention, the unnecessary feeding time is reduced, and the deformation of the labyrinth seals of the part is controlled. 本发明公开了一种粉末高温合金阶梯篦齿车加工方法，用于加工位于不同外径处的第一篦齿和第二篦齿，包括步骤一，粗车第一篦齿，留余量