Numerical Simulation and Experimental Verification of the Enveloping Unilateral Extrusion Forming Process for Radial Joint Bearings
WANG Wei1,*, PANG Shaoxiong1, DING Shijie1, YANG Haotian1, YU Chengcheng2,*
1 School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China 2 Ji Hua Laboratory, Foshan 528200, Guangzhou, China
Abstract: Radial joint bearings with high load capacity, corrosion resistance, compact structure and other advantages are widely used in mechanical transmission systems, in order to improve the comprehensive performance of the radial joint bearings to cope with the increasingly harsh use of the environment, this study proposes a 17-4PH precipitation hardening stainless steel for the bearing outer ring of the radial joint bearing mol-ding process. 17-4PH has high toughness and good corrosion resistance, however, 17-4PH has small modulus of elasticity, high hardness cha-racteristics lead to difficulties in plastic forming of the bearing outer ring. 17-4PH is small modulus of elasticity and high hardness lead to difficulties in plastic forming of bearing outer rings. In this study, a finite element model of bearing forming with 17-4PH as the outer ring is established to realize the numerical simulation of the extrusion forming process of centripetal joint bearing, to investigate the influence of various factors on the forming accuracy and maximum forming pressure of the bearing during the forming process of centripetal joint bearing, to obtain the forming rules of the encircling unilateral extrusion process with 17-4PH as the outer ring of the bearing, and to finally carry out the experimental validation of the forming process. The results show that by optimizing the blank size and forming distance of the bearing outer ring, the defects such as over-extrusion and under-extrusion of the bearing outer ring in the encircling unilateral extrusion forming process can be effectively improved, which provides a data reference for the formulation of the subsequent centripetal joint bearing forming plan.
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2025, Vol. 39 
