Multistage superplastic forming apparatus and method

Details Multistage superplastic forming apparatus and method Multistage superplastic forming apparatus and method

2006-11-30

2010-11-09

Jones, David B (Department: 3725)

Metal deforming

By application of fluent medium, or energy field

Using fixed die

C072S057000, C072S709000, C029S421100

Reexamination Certificate

active

07827840

ABSTRACT:
A superplastic forming apparatus and method for forming a sheet of material at an elevated temperatures into a workpiece having a complex geometry. The process takes advantage of a mechanical forming step, which draws material along a major axis to form a first preform. Upon completion of the first mechanical forming step, a second, initial superplastic forming step acts on the first preform to create a second preform having a plurality of channels or grooves located thereon. The grooves or channels function to draw additional material prior to the second or final gas forming step, which completes the forming process by driving the material against a forming surface. Accordingly, the method and apparatus function to reduce forming time and eliminate thinning and wrinkling of the sheet material during the forming process.

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