摆动碾压工艺具有无振动、噪声低、节能、高效、劳动强度低、省料和工艺成本低等优点,在汽车零配件生产中发挥了积极的作用。但是,摆头模具的使用寿命尚不够理想。以我厂摆碾汽车半轴为例,副材质为5CrMnMo、硬度40～45HRC的新模具,在摆碾约1500件后,摆头的盖模就出现了明显的热疲劳龟裂。如不及时维修,不仅会导致工件外端面出现 Swing rolling process has the advantages of no vibration, low noise, energy saving, high efficiency, low labor intensity, low material cost and process cost, and has played an active role in the production of auto parts. However, the life of the head mold is not ideal. Taking the semi-axle of our factory as an example, the new material with 5CrMnMo and 40 ~ 45HRC as the auxiliary material has obvious thermal fatigue cracks after the pendulum has been cast for about 1500 pieces. If not repaired, will not only lead to the appearance of the workpiece outside the end