Method and apparatus for forming multi-pole windings
AssigneeEmerson Electric Co.
InventorVernon E. Kieffer
Life of this patent
Estimating the term…
Abstract
Method and apparatus for forming a multi-pole winding for a dynamo-electric machine wherein a skein of magnet wire is wound and mounted on spaced retaining jaws biased outwardly to keep the wire under light tension during a subsequent forming process. Forming tools are moved inwardly against the wire between the retaining jaws to produce a petalled, serpentine form with a series of apices between the retaining jaws. Holding pins are inserted between the wire and the forming tools at the apices, and the forming tools are retracted. While the wire is held between the retaining jaws and holding pins, it is loaded onto a fingered transfer tool.
Claims18
A method of winding a multi-pole stator comprising forming a skein of a multiplicity of turns of magnet wire;
- engaging the inner reaches of the skein with retaining jaws spaced from one another;
- moving forming tools simultaneously inwardly against the outer reach of the skeined wire between said retaining jaws while said retaining jaws move inwardly sufficiently to accommodate the effective shortening of the wire reaches to produce a petalled, serpentine coil form with a series of inwardly directed apices between said retaining jaws;
- inserting a holding pin between the said outer reach of the wire at each of said apices and the forming tools;
- retracting said forming tools, and, while said wire is held between said pins and said retaining jaws, loading said formed wire onto a transfer tool.
Apparatus for forming coils for a dynamo-electric machine and mounting said coils on a transfer tool, comprising a table having a hole through it;
- a multiplicity of retaining jaws mounted on said table in spaced relation to one another for movement toward and away from said hole, said jaws being adapted to hold a skein of magnet wire extending from one to another of said jaws;
- means for biasing said retaining jaws in a direction away from said hole;
- forming tools mounted on said table between said retaining jaws for movement toward and to an inner position within the compass of a projection of said hole, and away from said inner position to an outer position outboard of reaches of said skein of magnet wire extending between said retaining jaws, each of said tools having a nose portion with a surface defining a recess opening toward said hole;
- means for moving said forming tools;
- pin means extending parallel to said recess-defining surfaces of said forming tools and mounted for reciprocating movement through said hole to a position at which they lie within the reach of said recess-defining surface and a second position at which they are clear of said surface, and transfer tool elevating means for reciprocatingly carrying a transfer tool, with fingers, spaced parallel to and outboard of said pins from a position at which said fingers are clear of reaches of a coil of wire held by said pins to a position at which said fingers project through and beyond said reaches of coils retained by said pins.
Dependencies are inferred from the claim text.