Mathematical Modeling and Modifying of Turntable's Angle for 5/12 automatic Numerical Controlling Bending Hoop Machine

摘要

Aiming at 5/12 full-automatic numerical control (NC) bending hoop machine, the paper analyzed the elastic-plastic bending deformation with the knowledge of elastic-plastic bending principle, theoretically mechanics and spring-back, and deduced the relationship of bending moment and curvature ratio, and built the mathematical model between bending hoop turntable's rotation angle and stirrups angle considering the spring-back deformation. Then the different spring-back angles under two types of stirrups diameter, Φ=8 mm and Φ=10 mm, are measured. The mathematical model of turntable's rotation angle and stirrup's angle for 5/12 automatic NC bending hoop machine is modified according to the analysis of bending test data.