초록 ▼

An elastomeric mandrel has a shallow groove around the outer diameter. A woven sleeve of ceramic fiber surrounds the mandrel; which in turn is covered with a woven sleeve of fiberglass. The mandrel with coverings is inserted into tubing to be joined by welding with the shallow groove positioned unde

An elastomeric mandrel has a shallow groove around the outer diameter. A woven sleeve of ceramic fiber surrounds the mandrel; which in turn is covered with a woven sleeve of fiberglass. The mandrel with coverings is inserted into tubing to be joined by welding with the shallow groove positioned under the joint. The mandrel is diametrically expanded by means located outside of the tubing to press the coverings against the inside of the tubing during time of welding, and the height of the weld underbead is controlled by the groove in the mandrel acting as a mold.

대표청구항 ▼

A device for controlling weld underbead height of aluminum tubular members comprising: a solid elastomeric mandrel with an axially located opening therethrough and the mandrel having a smaller diameter near each end than in the middle, a textile sleeve of ceramic fiber around the periphery of the ma

A device for controlling weld underbead height of aluminum tubular members comprising: a solid elastomeric mandrel with an axially located opening therethrough and the mandrel having a smaller diameter near each end than in the middle, a textile sleeve of ceramic fiber around the periphery of the mandrel, a textile sleeve of fiberglass fibers around the ceramic sleeve, a Bowden wire having one end of a spiral wire casing attached to one end of the elastomeric mandrel and the other end extending outside tubing to be welded and the wire attached at one end to a second end of the mandrel and the other end of the wire extending through and past the means outside the tubing for pulling on a spring steel wire to effect an axial compression to form a mold to control the underbead height of the weld.