A method for the integration of superplastic deep drawing and bulging of titanium alloy sheet assisted by high temperature solid powder medium

Abstract

The invention provides device for high temperature solid power medium assisting titanium alloy plate superplasticity drawing and bulging integration and a method thereof and relates to a device for drawing and bulging integration and a method thereof. The device comprises a punch, an upper die petal, an upper die sleeve, a lower die petal, a lower die sleeve, a spacer, an upper die cavity, a lower die cavity and a cushion block. The lower end of the punch is arranged in the upper die cavity, and the upper die sleeve is arranged outside the upper die petal; the lower die petal and the lower die sleeve are arranged on the cushion block, and the lower die sleeve is arranged outside the lower die petal; the spacer is arranged between the upper die sleeve and the lower die sleeve. The method comprises the steps that an aluminium alloy plate to be molded is put into the interspace formed by the upper die petal, the lower die petal and the lower die sleeve of the device for the high temperature solid power medium assisting titanium alloy plate superplasticity drawing and bulging integration, a powder medium is added into the upper die cavity, and pre-compaction, heating and heat preservation are sequentially conducted on the powder medium; then compaction, pressure maintaining and cooling are sequentially conducted to obtain an aluminium alloy part. By means of the device for the high temperature solid power medium assisting titanium alloy plate superplasticity drawing and bulging integration and the method thereof, aluminium alloy parts with uniform thicknesses can be obtained.

Description

technical field [0001] The invention relates to a method for integrating deep drawing and bulging. Background technique [0002] In recent years, superplastic forming technology has been more and more widely used. Since the sheet material is approximately in a viscous flow state during the forming process, the filling performance is excellent, and the use of gas as the pressure medium can form parts with complex shapes and high precision requirements at one time. However, as superplastic forming products become more and more widely used, especially in aerospace, the precision requirements for parts obtained by superplastic forming are also getting higher and higher; superplastic forming products generally have wall thickness uneven phenomenon. This is mainly due to the inhomogeneous distribution of the stress-strain field of the sheet metal during the superplastic forming process. The uneven wall thickness is mainly reflected in the following two aspects: on the one hand,...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the wall thickness of the part products prepared by the existing method is not uniform, and the prepared parts cannot be applied to the field that requires high precision of the part products, and to provide a high-temperature solid powder medium to assist the ultra-thin Method of integrating plastic deep drawing and bulging

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