工艺参数对高温合金薄壁异型曲面件旋压成形质量的影响

The effects of feed ratio, mandrel rotate speed, spinning temperature and blank diameter on the hot spinning forming quality of GH3128 superalloy thin-walled conical parts with curved surface were studied. The results show that within the given parameters, with the increase of feed ratio, the wall thickness reduction decreases, but the wrinkling degree increases. With the increase of mandrel rotate speed, the wall thickness reduction decreases, but the wrinkling degree increases. With the increase of spinning temperature, the wall thickness reduction first increases and then decreases, while the wrinkling degree first decreases and then increases. With the increase of blank diameter, both the wall thickness reduction and wrinkling degree show a gradual increase trend. To sum up, within the given parameters, the effect laws of feed ratio, mandrel rotate speed and spinning temperature on wall thickness reduction and wrinkling degree show the opposite trend. However, the effect of blank diameter on wrinkling degree and wall thickness reduction shows similar variation trend. Therefore, in order to obtain smaller wall thickness reduction and wrinkling degree, the middle value of the test range for feed ratio, mandrel rotate speed and spinning temperature should be chosen, while a smaller value of the blank diameter can be chosen on the premise of meeting the forming requirements. Based on above analyses, the optimal spinning parameter combination was determined.