The Boeing Company

John J deJong, Executor

Karl A Hansen, Deceased

Marc Rollo Matsen

Edward J Woods

Gregory Louis Clark

Ronald W Brown

John R Hare

James Healy

Sesceptor sheets are selected so that their magnetic permeability decreases to unity at approximately the desired operating temperature thereby limiting heating to this 'Curie temperature' and providing substantial uniformity of temperature in the panel Preferably, the susceptor includes multiple layers, such as a first metal having a relatively lower Curie temperature, a thin foil of copper in contact with the surface of the first sheet, and a second metal having a relatively higher Curie temperature. Such a susceptor allows thermal control at two spaced set points defined by the Curie temperatures.

Multilayer susceptors for achieving thermal uniformity in induction

Quality welds are highly dependent upon achieving appropriate temperatures everywhere along the bond line. The present invention uses multinode thermocouples to measure the bond line temperature in real time and to provide control signals for the moving coil (welding head).

Monitoring the bond line temperature in thermoplastic welds

A method of upsetting a headed rivet in a countersunk hole using an electromagnetic riveting machine having two opposed drivers which are impelled against each end of the rivet to upset the rivet with a single stroke of the machine. The movement of the driver at the headed end of the rivet in initiated slightly after movement of the driver at the shank end of the rivet to lift the headed end of the rivet slightly out of the countersink so, when the headed end driver operates, the rivet shank is deformed to fill the rivet hole as the head is driven back into the countersink for good shank interference in the hole adjacent the rivet head.

Method for upsetting a headed rivet by differential initiation of

For forming or consolidating organic matrix composites, for example, an organic matrix composite panel is sealed between sheets of a susceptor material that is susceptible to induction heating. The susceptor sheets are heated inductively. The sheets in turn conduct heat to the organic matrix composite panel. When heated to the desired temperature, the composite panel is consolidated and/or formed. In the present invention, the susceptor sheets are selected so that their magnetic permeability decreases to unity at approximately the desired operating temperature thereby limiting heating to this 'Curie temperature' and providing substantial uniformity of temperature in the panel. Of course, the concept applies to other induction heating operations for metals including SPF, brazing, annealing, heat treating, bonding, hot pressing, and the like.

Method for achieving thermal uniformity in induction processing of

A fiber reinforcement fabric contains a metal susceptor strip paired with each warp thread and woven with the weave thread to produce a thermoplastic welding susceptor of separated and electrically isolated, longitudinal metal strips and fiber reinforcement in the weld.

Reinforced susceptor for induction or resistance welding of

For forming or consolidating organic matrix composites, for example, an organic matrix composite panel is sealed in a 'retort' between sheets of a susceptor material that is susceptible to induction heating. The susceptor sheets are heated inductively. The sheets in turn conduct heat to the organic matrix composite panel. When heated to the desired temperature, the composite panel is consolidated and/or formed. In the present invention, the susceptor sheets are selected so that their magnetic permeability decreases to unity at approximately the desired operating temperature thereby limiting heating to this 'Curie temperature' and providing substantial uniformity of temperature in the panel. Of course, the concept applies to other induction heating operations for metals including SPF, brazing, annealing, heat treating, bonding, hot pressing, and the like.

Retort for achieving thermal uniformity in induction processing of

A conformal skate for use in an inductive welding system for creating a fusion bond along a bond line between two thermoplastic parts includes a wheel having a circumferential casing made of fluid impervious flexible material. The wheel is rotatably mounted on a fixed axle by fluid tight bearings. The axle has an axial passage for admission of pressurizing and cooling fluid, and for power leads for the coil and for leads for sensors inside the wheel. A vertical mount on the axle supports the coil for vertical motion and biases the coil downwardly so that it remains in contact with the inside surface of the casing despite unevenness or contour changes in the upper surface of the top part or changes in the wheel shape when the fluid pressure in the wheel or downward force on the axel is changed. A supporting member such as a strut or frame supports the axle and applies the downward force which the wheel distributes over the footprint in contact with the top part, in line with the magnetic field generated by the coil. The size of the wheel footprint is a function of the amount to liquid in the wheel and the force exerted by the supporting member, which pressurizes the fluid sealed in the vessel and distributes pressure uniformly over the footprint of the wheel to press the top part against the bottom part and facilitate fusion bonding of the thermoplastic in the melt pool created by the inductively heated susceptor.

Growing community of inventors

Bellevue, WA, United States of America

John J deJong, Executor