Abstract: Various embodiments of the invention include solutions for chamber-less thermal joining. A first aspect includes a system for performing a thermal joining of a joint space defined by a metallic part without an environmental chamber thereabout. The system may include an induction coil for heating an area adjacent to the joint space defined by the metallic part for the thermal joining of the joint space. The system may also include a gas lens for directing a shielding gas towards the joint space, and a valve system for controlling a flow of the shielding gas from the gas lens. A vacuum system creates a negative pressure in the metallic part to urge the shielding gas through the joint space during the thermal joining, thus allowing thermal joining of the metallic part without an environmental chamber thereabout.

Abstract: Various embodiments of the invention include solutions for chamber-less thermal joining. A first aspect includes a system for performing a thermal joining of a joint space defined by a metallic part without an environmental chamber thereabout. The system may include an induction coil for heating an area adjacent to the joint space defined by the metallic part for the thermal joining of the joint space. The system may also include a gas lens for directing a shielding gas towards the joint space, and a valve system for controlling a flow of the shielding gas from the gas lens. A vacuum system creates a negative pressure in the metallic part to urge the shielding gas through the joint space during the thermal joining, thus allowing thermal joining of the metallic part without an environmental chamber thereabout.

Abstract: A brazing method is provided including the steps of, preplacing a braze alloy on a first plurality of conductive strands, the first plurality of conductive strands comprising a first stator bar, preplacing a braze alloy on a second plurality of conductive strands, the second plurality of conductive strands comprising a second stator bar, and heating at least a portion of the first stator bar to join the first plurality of conductive strands and the second stator bar to join the second plurality of conductive strands. Another step is used for electrically connecting the first stator bar to the second stator bar.

Abstract: A brazing method for a dynamoelectric machine is provided, and includes the steps of providing a first dynamoelectric machine part and a second dynamoelectric machine part, where a first portion of the first dynamoelectric machine part is configured to fit inside a second portion of the second dynamoelectric machine part. A step of preplacing a non-self-fluxing braze alloy on the first portion or the second portion. A step of thermally treating the first portion or the second portion, to create a temperature differential and size differential between the first portion and the second portion. A step of inserting the first portion into the second portion, and heating at least one of the first portion and the second portion to melt the non-self-fluxing braze alloy. The first portion is joined to the second portion by brazing in air, without the use of a flux, vacuum or inert atmosphere.

Abstract: A brazing method includes the steps of providing a first part and a second part, at least a first portion of the first part configured to fit inside a second portion of the second part, preplacing a non-self-fluxing braze alloy on one or more of the first portion and the second portion, thermally treating at least one of the first portion and the second portion, to create a temperature differential between the first portion and the second portion, inserting the first portion into the second portion, and heating at least one of the first portion and the second portion to melt the non-self-fluxing braze alloy. The first portion is joined by brazing to the second portion.

Abstract: A brazing method includes the steps of providing a first part and a second part, at least a first portion of the first part is configured to fit inside a second portion of the second part, preplacing a first self-fluxing braze alloy on one or more of the first portion and second portion, preplacing a non-phosphorous braze alloy on the first self-fluxing braze alloy, preplacing another layer of the first self-fluxing braze alloy on the non-phosphorous braze alloy, thermally treating at least one of the first portion and second portion, to create a temperature differential between the first portion and second portion, inserting the first portion into the second portion, and heating at least one of the first portion and second portion to melt both layers of the first self-fluxing braze alloy and the non-phosphorous braze alloy. The first portion is joined by brazing to the second portion.