Vacuum holding rotary welding fixture

摘要

A welding fixture includes a stationary tubular outer manifold having an outer flow passage extending radially therethrough for drawing vacuum, and a tubular spindle extending coaxially therethrough. The spindle includes a mandrel at one end over which the bore of a tubular body is positioned. A sleeve at the opposite end of the spindle is used for rotating the spindle. An inner manifold adjoins the sleeve and is disposed inside the outer manifold, and has an inner flow passage extending radially therethrough and disposed in flow communication with the outer passage for drawing vacuum inside the spindle and in turn inside the body for retaining a disk thereon. An annular flange adjoins the mandrel and the inner manifold, and has a seat facing the mandrel for receiving the body at a complementary counterbore, and also includes a bearing land disposed in contact with the outer manifold for rotation thereon. The spindle is rotated for rotating the body and disk thereon for allowing welding of the disk to the body. Vacuum is drawn in the body through the spindle for vacuum holding the disk to the body during the welding process.