Strong rolling and ultrasonic rolling composite strengthening method for high-strength steel torsion shaft and machine tool

• Main Authors: WANG XIBIN, LI HONGWEI, HU YUTONG, TAN HAO, DU YUCHAO, SHEN WENHUA, CHEN SICHEN, CHEN RUI, LI ZEKUN, LUAN XIAOSHENG, ZHOU LEI, LIANG ZHIQIANG
• Format: Patent
• Language: Chinese; English
• Published: 25.02.2022
• Subjects: COMBINED OPERATIONS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; OTHER WORKING OF METAL; PERFORMING OPERATIONS; TRANSPORTING; UNIVERSAL MACHINE TOOLS

The invention provides a powerful rolling and ultrasonic rolling composite strengthening method for a high-strength steel torsion shaft and a machine tool. The fatigue life of the torsion shaft can be effectively prolonged. The method comprises the steps: firstly, carrying out strong rolling strengthening on the high-strength steel torsion shaft, so that a residual compressive stress layer with high amplitude and large layer depth is generated on the surface layer; and then the high-strength steel torsion shaft is subjected to ultrasonic rolling strengthening, so that surface layer material grains are refined, the surface roughness is reduced, and the surface performance is homogenized. Through a composite strengthening method, comprehensive treatment of surface finishing and surface layer deep rolling strengthening of the torsion shaft is achieved. The machine tool comprises a machine tool main body, a carriage box, a machine tool main shaft, a left side inner center, the torsion shaft, a displacement measur