Engineering topics

Mcclure, S. R.

Publications and source records attributed to Mcclure, S. R..

3 records

NASA NTRS1980

Method and apparatus for holding two separate metal pieces together for welding

A method of holding two separate metal pieces together for welding is described including the steps of overlapping a portion of one of the metal pieces on a portion of the other metal piece, encasing the overlapping metal piece in a compressible device, drawing the compressible device into an enclosure, and compressing a portion of the compressible device around the overlapping portions of the metal pieces for holding the metal pieces under constant and equal pressure during welding. The preferred apparatus for performing the method utilizes a support mechanism to support the two separate metal pieces in an overlapping configuration; a compressible device surrounding the support mechanism and at least one of the metal pieces, and a compressing device surrounding the compressible device for compressing the compressible device around the overlapping portions of the metal pieces, thus providing constant and equal pressure at all points on the overlapping portions of the metal pieces.

Mcclure, S. R.↗

NASA NTRS1979

Welding fixture for thin metal parts

Approach of supporting entire part contour and applying uniform pressure to joints is useful in fabricating other lightweight metal structures. Fixture has three essential components: spring-finger collet that applies pressure to joint, compressing device for tightening collet, and mandrel that supports parts. Besides preserving contour of parts, mandrel also functions as heat sink.

Mcclure, S. R.↗

NASA NTRS1977

Tissue stimulator enclosure welding fixture

It was demonstrated that the thickness of the stimulator titanium enclosure is directly related to the battery recharge time cycle. Reduction of the titanium enclosure thickness from approximately 0.37 mm (0.015 inch) to 0.05 mm (0.002 inch) significantly reduced the recharge time cycle and thereby patient inconvenience. However, fabrication of titanium enclosures from the thinner material introduced problems in forming, holding, and welding that required improvement in state of the art shop practices. The procedures that were utilized to resolve these fabrication problems are described.

Mcclure, S. R.↗