Numerical Simulation and Experimental Research on Forging of Cylinder Bottom

Abstract

In this work, a new forging process is proposed for bottom instead of the original casting process. In order to achieve better technological parameters combination, the finite element method (FEM) and orthogonal experiment were utilized to research the process of cylinder bottom forging. Forming maximum load, mould maximum wear and forging maximum damage were chosen as evaluating indicators. Billet preheating temperature, the mold preheating temperature, forging speed and friction factor were taken into consideration to analysis the influence on forming quality for the bottom. The significant factors and the optimal value, i.e. Billet preheating temperature (1150°C),the mold preheating temperature (350°C),the forging speed (50mm/s) and the friction factor (0.2) were determined. After the technological experiment, the qualified quality cylinder bottom can be manufactured by the optimized forging process.

Synchronization Control Algorithm of Double-Cylinder Forging Hydraulic Press Based on Fuzzy Neural Network

“…According to the principle of the synchronous control system, the two hydraulic cylinders in the double-cylinder forging hydraulic press servo system are symmetrical, and the parameters are the same. Then one of the hydraulic cylinders is mathematically modeled [17][18][19]. The transfer function of the hydraulic cylinder can be composed of the flow equation of the proportional valve, the flow continuity equation of the hydraulic cylinder control chamber, and the hydraulic balance equation of the hydraulic cylinder and the load [20].…”