Method of making sandwich structures by superplastic forming and

Details Method of making sandwich structures by superplastic forming and Method of making sandwich structures by superplastic forming and

1980-11-24

1983-07-12

Ramsey, Kenneth J.

Metal fusion bonding

Process

Using bond inhibiting separating material

228157, B23K 2018

Patent

active

043926029

ABSTRACT:
An improvement is disclosed to the method of forming sandwich structures wherein a plurality of workpieces having opposed principal surfaces are placed in a stack contacting facing principal surfaces and thereafter diffusion bonding portions of said facing principal surfaces of said workpieces together and superplastic forming at least a portion of at least one of said workpieces. The improvement comprises coating at least one of the facing principal surfaces with a maskant. The maskant is then removed from the portions not to be diffusion bonded of the at least one coated facing principal surface. A stopoff material is applied to the portions where the maskant has been removed and thereafter the remaining maskant is removed. The preferred method of removing the maskant from the portion of the at least one coated principal surface comprises placing a template on the surface and thereafter cutting out the maskant. In one embodiment prior to the step of applying the stopoff the portions of the at least one facing principal surface where the maskant has been removed is etched to a depth equal to the thickness of the stopoff material to be applied. This allows the tolerance between opposed facing principal surfaces to be reduced when the workpieces are tubular in form.

REFERENCES:
patent: 3831246 (1974-08-01), Morris
patent: 3927817 (1975-12-01), Hamilton et al.
patent: 3934441 (1976-01-01), Hamilton et al.
patent: 4093754 (1978-06-01), Parsons
patent: 4220276 (1980-09-01), Weisert et al.
patent: 4295255 (1981-10-01), Weber

Affiliated with

Also associated with

Rating

Method of making sandwich structures by superplastic forming and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making sandwich structures by superplastic forming and, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making sandwich structures by superplastic forming and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-194333