Multi-hook-face titanium alloy part forming device and method

Abstract

The invention relates to a multi-hook-face titanium alloy part forming device and method. According to the technical scheme, a male die is pressed to coarsely manufacture a workblank into a multi-hook-face titanium alloy part with the unfolded appearance; deburring, washing, lubricant coating are carried out; the device is arranged on a heat engine to be pre-heated into 550 DEG C to 600 DEG C, and meanwhile the workblank is pre-heated into 550 DEG C to 600 DEG C; the pre-heated workblank is arranged between a blank holder and a female die, and after the blank holder and the female die are combined tightly, the temperature ranging from 550 DEG C to 600 DEG C is kept, the clamping pressure is 40 t, the female die slowly descends at the descending speed ranging from 5 mm / min to 6 mm / min, the female die stays for three minutes to five minutes after descending for three to five minutes every time, the process is executed three times till the female die and the male die are closed, and the pressure is kept for four minutes to five minutes; the appearance is manufactured, and checking is carried out. The workblank in the non-working area is clamped tightly through the blank holder force of the blank holder, and wrinkles and cracks produced by tremendous changes of the plate face of the workblank when the dies are closed are avoided.

Description

technical field [0001] The invention is mainly applied to the forming of multi-curved surface and large bent thin-plate titanium alloy parts. Background technique [0002] like figure 1 and figure 2 As shown, it is a multi-curved, large-bend titanium alloy part. The material grade of this part is TCI, the material thickness is δ0.8, and there are many profiles and complex shapes. The height of the flange of the part is about 20mm, the angle between the A surface and the B surface is 83°, and the angle between the B surface and the C surface is about 70°. There is two-way bending, and the overall bending angle is relatively large. When relying on the mold to form parts, the B surface is subjected to transverse tensile stress and radial tensile stress, and the R angle on both sides and the R angle at the connection with the A surface are not uniformly stressed, and the material flow is affected, which is prone to wrinkles and even cracks. Phenomenon. And because there is...

AI Technical Summary

Problems solved by technology

For such as figure 1 The problems in the forming of complex parts shown are: when relying on molds to form such parts, the curved surface is subjected to tensile stress in multiple directions and radial tensile stress, and the force at the R angle is uneven, causing instability and affecting material flow , it is easy to produce wrinkles and even cracks, which adds great difficulty to the forming of parts

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