The Parametric Design Of Blade Forging Die Based On UG NX And Forging Process Analysis

The shape of blade is complex, the material is advanced and hard to shape, internaland external quality requirements are high. Forging can improve microstructure of theworkpiece, so as to improve its mechanical properties, so it has been widely used inblade making. The blade forging die design task is heavier, because the blade has manykinds and small lot production, it takes a long time to design a set of blade forging dieby using general CAD software, according to manufacturer’s own situation to developdedicated blade forging die design system is an effective way to shorten the designcycle of blade forging die. By analyzing the simulation resluts, many practical problemscan be solved at the design stage using numerical simulation in blade forging processbefore testing die, which reduces the waste of materials and time in traditional method.Based on a certain type of blade forging and forging die schedule drawing, the sizeparameters of all characteristic section are controlled using expression in UG NXsoftware, and then parametric design was realized. Using the tools of the UG secondarydevelopment include UG/Open API, UG/Open MenuScript, UG/Open UIStyler andVC++to develop a parametric design system of blade forging die.Typical blade forging process for TC4titanium alloy, importing the blade preformdie and the final forging die generated by the system to DEFORM software, by meansof finite element simulation, the forming process of blade preform and the final forgingis studied. Under different friction factor based on the blade preform process simulation,those are analyzed after screw press hit three times, the temperature distribution of thewhole blade forging, the distribution of equivalent stress, equivalent strain of the wholeblade forging and load stroke curve, the results show that the deformation is small, theimpact of different friction condition is very small, with the increase of deformation,when friction factor is small, the temperature of the forging is lower, equivalent stress isbigger, the load is smaller. For blank is optimized, reduced the flash, improve materialutilization.After simulated the blade final forging forming process, the result shows that afterhit three times, both the situation of forming and the temperature distribution of thewhole blade forging are good, In the forming process, the temperature of blade tip andboss drop quickly, but the temperature of flash rise very quickly. The forming law of the blade final forging is achieved by analyzing the equivalent stress, equivalent straindistribution and load-stroke curve of the typical section after hiting three times: thedeformation of the tenon is small and easily, and the deformation of the center isrelatively large, the middle of the blade body and the die are in contact first, so itproduce deformation first, as the press quantity of the upper die increases, the cavity ofthe middle of the blade body is filled with the metal, then the metal flow in two sidesand fill the whole cavity and form flash in the end. The result shows that thesuperplastic forming greatly reduces the equivalent stress and the load throughnumerical simulation of the superplastic forming process of the blade.