Accession Number : AD0476292

Title :   THE APL RESISTANCE WELDER.

Descriptive Note : Technical memo.,

Corporate Author : JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB

Personal Author(s) : Evans, Richard C. ; Dargis, Algimantas

Report Date : MAY 1965

Pagination or Media Count : 109

Abstract : In order to improve the reliability of welds used in satellite construction, a new welding machine has been developed. This welding machine consists of a set of storage batteries to supply current, a bank of transistor switches to regulate the magnitude and duration of the current, and a commercial welding head. The new welder produces: a pulse whose current and duration can be independently controlled to a high degree of accuracy; a pulse whose current remains very close to its predetermined value regardless of changes in resistance in the weld being made; a pulse which is constant from day-to-day and from machine-to-machine. (Author)

Descriptors :   *WELDING, *MACHINES, RELIABILITY, STORAGE BATTERIES, TRANSISTORS, INSTRUMENTATION, STATISTICAL ANALYSIS, ARTIFICIAL SATELLITES, DEFORMATION, ELECTROMAGNETIC PULSES, METALLOGRAPHY, TABLES(DATA), DYNAMICS, SWITCHING CIRCUITS, ELECTRICAL RESISTANCE, NICKEL ALLOYS.

Subject Categories : Couplers, Fasteners, and Joints
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE