Methods and apparatus for fusing electrical conductors
First Claim
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1. Apparatus for fusing at least one armature wire and at least one piece of commutator material together, said apparatus comprising:
- a fusing member for applying force and heat to soften said commutator material and to deform said commutator material around said armature wire;
a grounding member;
means for moving said fusing member relative to said armature wire and said commutator material in order to cause said fusing member to contact and apply force to said commutator material thereby deforming said commutator material intimately around said armature wire;
means for generating an essentially non-oscillating current through said armature wire and said commutator material from said fusing member to said grounding member to heat said fusing member so that said commutator material is softened and so that said heat vaporizes insulation on a portion of said armature wire within said softened deformed commutator material; and
means for controlling the delivery of said non-oscillating current in accordance with a predetermined electrical delivery function.
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Abstract
Methods and apparatus for fusing together electrical conductors to a commutator are provided. A precise, timed, and controlled delivery of electric current to the fusing electrode of the fusing machine is achieved. A generic supply signal is converted into a precise and constant input signal through the use of monitoring and feedback techniques, which compare the current status of the physical and electrical phases of the fusing operation to various predetermined fusing profiles to determine the proper application of current to the fusing electrode.
20 Citations
13 Claims
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1. Apparatus for fusing at least one armature wire and at least one piece of commutator material together, said apparatus comprising:
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a fusing member for applying force and heat to soften said commutator material and to deform said commutator material around said armature wire; a grounding member; means for moving said fusing member relative to said armature wire and said commutator material in order to cause said fusing member to contact and apply force to said commutator material thereby deforming said commutator material intimately around said armature wire; means for generating an essentially non-oscillating current through said armature wire and said commutator material from said fusing member to said grounding member to heat said fusing member so that said commutator material is softened and so that said heat vaporizes insulation on a portion of said armature wire within said softened deformed commutator material; and means for controlling the delivery of said non-oscillating current in accordance with a predetermined electrical delivery function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. The method of using a fusing member to fuse together at least one armature wire and at least one piece of commutator material, the method comprising the steps of:
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moving said fusing member relative to said armature wire and said commutator material in order to cause said fusing member to contact and apply force to said commutator material thereby deforming said commutator material intimately around said armature wire; generating an essentially non-oscillating current through said armature wire and said commutator material from said fusing member to a grounding member to heat said fusing member so that said commutator material is softened and so that said heat vaporizes insulation on a portion of said armature wire within said softened deformed commutator material; and precisely controlling the delivery of said non-oscillating current in accordance with a predetermined electrical delivery function. - View Dependent Claims (10, 11, 12, 13)
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Specification