Showing papers on "Cold welding published in 1978"

Narrow weld-groove welding process and apparatus therefor

Abstract: A narrow weld-groove welding process, in which a bare welding wire is fed into a weld groove defined between the opposed surfaces of two pieces of metals for producing a metal arc therein for welding. In this process, a welding wire is subjected to a plastic deformation of a wave form, before being fed into a nozzle hole provided in a contact tip, and then the wire is fed into a nozzle hole, while maintaining elasticity tending to cause waving, whereby the tip of a welding wire being fed through a nozzle exit is automatically waved between the opposed surfaces of metals to be joined, with the tip of wire being alternately faced in the opposite directions, in response to the weaving motion thereof, with the feeding of the welding wire and progress of welding. In addition, the apparatus for use in a narrow weld-groove welding process is also disclosed.

Method of cold welding using ion beam technology

Abstract: A method for cold welding metal joints. In order to remove the contamination layer on the surface of the metal, an ion beam generator is used in a vacuum environment. A gas, such as xenon or argon, is ionized and accelerated toward the metal surface. The beam of gas effectively sputters away the surface oxides and contamination layer so that clean underlying metal is exposed in the area to be welded. The use of this method allows cold welding with minimal deformation. Both similar and dissimilar metals can be cold welded with this method.

Energy beam welding with filler material

Abstract: In automatic energy beam welding, as electron beam welding, of workpiece edges which form a gap of varying width along the weld line, the amount of filler material needed for making up for the volume of the gap is determined by probing the size of the solidified weld bead at a surface of the workpiece and the rate of supply of filler material to the welding zone is controlled on the basis of the result of such determination such that the size is maintained between predetermined limits.

Charged particle beam welding with beam deflection around weld pool retainers

Abstract: A method and apparatus for charged particle beam welding is provided with a beam deflection mechanism adjacent the surface of the workpiece The beam deflection mechanism permits the use of a welding shoe for retaining a pool of molten material adjacent the point of welding

Heat input control for electric seam pipe welding

Abstract: PURPOSE: A moving steel pipe is detected in material thickness and speed variations and the detection is used together with the calculation formula to calculate welding heat to be inputted. The result is used to control the actual heat input to provide a good weiding free of penetration and cold welding. CONSTITUTION: The thickness of steel belt 1 is measured by the gage 4 midway the uncoiler 2 and the forming rolls 3, and the measured thickness t is inputted into the microcomputer 5. The pipe making speed of steel pipe 8 induction-welded by the work coil 6 and the squeeze roll 7 is measured by contacting the measuring roll 9, and the measured speed signal is inputted into the computer 5 as speed v and tracking signal TR. There, welding heat to be inputted is caculated, and the calculated result is used to control first voltage of the high frequency welder system 10 so as to meet the calculation. Thus, the process enables an automatic control of adequate weld heat input that correspond to the actual thickness and speed variations. COPYRIGHT: (C)1979,JPO&Japio

The use of ion beam cleaning to obtain high quality cold welds with minimal deformation

Abstract: A variation of cold welding is described which utilizes an ion beam to clean mating surfaces prior to joining in a vacuum environment. High quality solid state welds were produced with minimal deformation.

Automated space fabrication of structural elements

Abstract: A description is presented of an automated space fabrication technique for basic structural elements, taking into account as representative the design loads and requirements of the solar power satellite structure. Roll forming for continuous cap and brace members is applicable for all proposed metallic materials. Spot-welding, electron beam welding, ultrasonic welding, laser welding, cold welding, and various mechanical fastening techniques are applicable for the automated fabrication process. Termination of the formed cap and brace members can be accomplished by sawing, shearing, punching, and laser cutting. The most cost effective materials were found to be the aluminum alloys. Selected for further study were AL20224T3 and AL2219-T62. In the area of fiber composites, thermoplastic matrix materials with graphite fibers were selected for future studies.

Anode made of prismatic alkali metal for primary cells - has mesh shaped substrate with adhering metallic layers on both faces

Abstract: A prismatic alkali metal anode with a construction that can be used in electrochemical cells with a high discharge capacity. The anode structure wears uniformly and has low IR losses. It also has a fixed electrically conducting smooth substrate coated with two alkali metal foils. The substrate (20) has a mesh shape with a layer of metal rigidly adhering to opposite surfaces of the substrate. Each layer of anode material consists of a lithium foil. The composite unit is constructed by making use of its cold welding properties. The mesh (24) fits into a frame with a larger cross-section to increase rigidity.

Laser welding of electrical interconnections

Abstract: Processes and equipment have been developed for welding thin aluminum and copper foils using a Nd : YAG laser. Laser welding provides an alternate technique with improved quality for welding these types of electrical terminations.