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

A high-temperature solid, aluminum alloy sheet technology, used in metal processing equipment, forming tools, manufacturing tools, etc., can solve the problems of unapplied parts, uneven wall thickness of parts and products, and achieves no need for sealing space, simple structure, and general use. good effect

CN104624799BActive Publication Date: 2016-07-06HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-07-06

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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.
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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,...

Examples

specific Embodiment approach 1

[0024] Specific Embodiment 1: This embodiment is a high-temperature solid powder medium-assisted superplastic drawing and bulging integration device for titanium alloy plates, including a punch 1, an upper mold part 2, an upper mold cover 3, a lower mold part 5, Lower die set 6, gasket 8, upper die cavity 9, lower membrane cavity 10 and pad 11;

[0025] The inside of the upper die part 2 is provided with an upper die cavity 9; the lower end of the punch 1 is arranged in the upper die cavity 9, and the outer part of the upper die part 2 is provided with an upper die cover 3; the lower die part 5 and the lower die cover 6 It is arranged on the cushion block 11, and the lower mold cover 6 is arranged outside the lower mold part 5; the lower mold part 5 is provided with a lower membrane cavity 10, and a gasket 8 is provided between the upper die cover 3 and the lower die cover 6.

[0026] figure 1 It is a structural schematic diagram of a high-temperature solid powder medium assi...

specific Embodiment approach 2

[0036] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the lower end of the punch 1 is in the shape of a truncated cone, and the diameter of the small end of the truncated cone is 2 / 3 of the diameter of the large end of the truncated cone. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the small diameter of the upper mold part 2 is 2 mm larger than the large diameter of the lower frustum of the punch 1 . Other steps are the same as those in Embodiment 1 or 2.