Method for removing winding conductors from a twisting machine and placing them in a rotor stator stack

• US 7,941,910 B2
• Filed: 03/22/2007
• Issued: 05/17/2011
• Est. Priority Date: 03/22/2007
• Status: Active Grant

• Current Assignee: Tecnomatic S.p.A.
• Original Assignee: Tecnomatic S.p.A.
• Inventors: Guercioni, Sante
• Primary Examiner(s): CAZAN, LIVIUS RADU
• Application Number:
  US11/728,258
• Publication Number:
  US 20090265909A1
• Time in Patent Office: 1,517 Days
• Field of Search: 295/96, 295/98, 297/32, 297/35, 310/201
• US Class Current: 29/596
• CPC Class Codes: H02K 15/0428 characterised by the method or apparatus for simultaneously twisting a plurality of hairpins for simultaneously twisting a plurality of hairpins open ends after insertion into the machine H02K15/0087
• CPC Class Codes: H02K 15/063 Windings for large electric machines, e.g. bar windings windings consisting of cables H02K15/065
• CPC Class Codes: H02K 15/064 Windings consisting of separate segments, e.g. hairpin windings H02K15/063 takes precedence
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine
• CPC Class Codes: Y10T 29/49012 Rotor
• CPC Class Codes: Y10T 29/49817 with other than ancillary treating or assembling
• CPC Class Codes: Y10T 29/53157 Means to stake wire to commutator or armature

Abstract

Method for removing winding conductors from a twisting machine and placing them in a rotor or stator stack. For a plurality of rectangular winding conductors each having a pair of legs separated by an amount equal to the distance between a predetermined number of rotor or stator slots in which they will be inserted, moving a plurality of fingers of a clamping assembly between the legs of a plurality of winding conductors in a twisting fixture to retain the winding conductors, moving the clamping assembly away from the twisting fixture to withdraw the winding conductors from the twisting fixture, providing relative movement of the clamping assembly and a rotor or stator to insert free ends of the winding conductors into a rotor or stator, and moving the fingers of a clamping assembly from between the legs of a plurality of winding conductors. A preferred embodiment of the method is disclosed.

Claims

1. A method of removing from a twisting fixture and inserting into a rotor or stator a plurality of rectangular winding conductors each having a pair of legs separated by an amount equal to the distance between a predetermined number of rotor or stator slots in which they will be inserted and integrally connected at one end thereof, comprising:

with the legs of the winding conductors being aligned, each on a radial line from a center axis of the twisting fixture, the radial lines being equally angularly spaced about the center axis of the twisting fixture by a predetermined angle, placing a clamping assembly adjacent the twisting fixture, the clamping assembly having a plurality of outer fingers equally angularly spaced about the center axis of the twisting fixture by the predetermined angle and a plurality of inner fingers equally angularly spaced about the center of the twisting fixture by the predetermined angle, the outer fingers being radially outward of the winding conductors and the inner fingers being radially inward of the winding conductors;

moving the inner fingers radially outward and the outer fingers radially inward to project between legs of the winding conductors and between the integral connections of the legs and the twisting fixture;

separating the clamping assembly and the twisting fixture, and with the center axes of the clamping assembly and the rotor or stator aligned and with the clamping assembly and the rotor or stator angularly aligned about their center axes with respect to each other, bringing the clamping assembly adjacent the rotor or stator to insert free ends of the winding conductors into the rotor or stator; and

,

moving the inner fingers radially inward and the outer fingers radially outward beyond the winding conductors.

2. The method of claim 1 wherein moving the inner fingers radially outward and the outer fingers radially inward to project between legs of the winding conductors and between the integral connections of the legs and the twisting fixture comprises moving the inner fingers radially outward to support the legs of the winding conductors against radially inward deflection, and moving the outer fingers radially inward to project between legs of the winding conductors and between the integral connections of the legs.

3. The method of claim 2 wherein the outer fingers wedge between the legs of the winding conductors when moved radially inward.

4. The method of claim 2 wherein the outer fingers are mounted on arms disposed on the clamping assembly for rotation about an axis in a plane perpendicular to the center axis of the clamping assembly and perpendicular to a radial line to the respective outer finger, and the inner fingers are mounted on arms disposed on the clamping assembly for rotation about an axis in a plane perpendicular to the center axis of the clamping assembly and perpendicular to a radial line to the respective inner finger.

5. The method of claim 4 wherein the inner fingers and the outer fingers are moved by control of a common actuator.

6. The method of claim 2 wherein the inner fingers and the outer fingers are moved by control of a common actuator.

7. The method of claim 1 wherein the outer fingers are mounted on arms disposed on the clamping assembly for rotation about an axis in a plane perpendicular to the center axis of the clamping assembly and perpendicular to a radial line to the respective outer finger, and the inner fingers are mounted on arms disposed on the clamping assembly for rotation about an axis in a plane perpendicular to the center axis of the clamping assembly and perpendicular to a radial line to the respective inner finger.

8. The method of claim 7 wherein the inner fingers and the outer fingers are moved by control of a common actuator.

9. The method of claim 1 wherein the inner fingers and the outer fingers are moved by control of a common actuator.

10. The method of claim 1 wherein the ends of the winding conductors are guided into the rotor or stator with the aid of tapering the free ends of the winding conductors.

11. The method of claim 10 wherein the free ends of the winding conductors are inserted into an insulated rotor or stator.