Research On Forging Die And Die Holder For Large Crankshaft On140MN Hot Forging Press

As a key component of engine, crankshaft has a complex shape and lowformability. As we know,140MN hot forging press is the largest type in Chinanow and the die holder whereon has heavy weight, low machinability and highcost, it is significant to research die and die holder for crankshaft on140MN hotforging press.Die holders with2types of ejector pin,3types of guider were finite elementmethod thermal-mechanical analyzed by ANSYSWorkbench in this dissertation.The stress distributions of die seats with different ejector pins as well as3typesof guider were compared, which could set a base for selecting suitable die holder.Especially, a forging technics of crankshaft was calculated and a technicalprocess including pre-forging, finish-forging, trimming and torsioning wasdesigned. Temperature field, velocity field, stress field and load in crankshaftforming process were simulated by QForm, which was helpful to blank sectionand die design. In addition, the simulation of die stress and abrasion providednew argument for large batch production, die in use and design.Finally, the results of simulation were validated by practical testing on site and thesuitable blank was selected for small batch production.