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US 11,881,748 B2Granted
Method of inserting a hairpin
AssigneesHyundai Motor Company, Kia Corporation
InventorSeung Min Choi
Life of this patent
Estimating the term…
Abstract
A method can be used for inserting a hairpin in a stator core. The method includes unwinding a coil spiral-wound on an uncoiler, forming a decoated portion by decoating a predetermined portion on the coil, bending the coil in multiple stages to two-dimensionally form a leg portion and a head portion of a hairpin, cutting the coil formed with the leg portion and the head portion by a predetermined length, and moving the hairpin to be inserted into a stator core while three-dimensionally forming the head portion.
Claims20
A method comprising:
- unwinding a coil spiral-wound on an uncoiler;
- forming a decoated portion by decoating a predetermined portion of the coil;
- bending the coil in multiple stages to two-dimensionally form a leg portion and a head portion of a hairpin;
- cutting the coil formed with the leg portion and the head portion by a predetermined length;
- moving the hairpin to be inserted into a stator core while three-dimensionally forming the head portion;
- inserting the hairpin into the stator core;
- and
- press molding the head portion of the hairpin, wherein the press molding comprises press molding the head portion of the hairpin using a molding jig driven by a clamping device.
5 more elements
A method comprising:
- unwinding a coil spiral-wound on an uncoiler;
- forming a decoated portion by decoating a predetermined portion of the coil;
- bending the coil in multiple stages to two-dimensionally form a leg portion and a head portion of a hairpin;
- cutting the coil formed with the leg portion and the head portion by a predetermined length;
- and
- moving the hairpin to be inserted into a stator core while three-dimensionally forming the head portion, wherein moving the hairpin to be inserted into the stator core while three-dimensionally forming the head portion comprises:
- coupling a fixing block to a fixing chuck of a connection bracket while a molding jig is inserted into at least one damper;
- loading the coil such that the head portion that has been two-dimensionally formed is interposed between the molding jigs;
- three-dimensionally forming the head portion while the molding jigs are brought tightly close together by the at least one damper;
- and
- moving the hairpin while three-dimensionally forming the head portion.
8 more elements
A method comprising:
- unwinding a coil spiral-wound on an uncoiler;
- forming a decoated portion by decoating a predetermined portion of the coil using a heating device to heat the coil;
- bending the coil in multiple stages to two-dimensionally form a leg portion and a head portion of a hairpin;
- cutting the coil formed with the leg portion and the head portion by a predetermined length;
- moving the hairpin to be inserted into a stator core while three-dimensionally forming the head portion;
- inserting the hairpin into the stator core;
- and
- press molding the head portion of the hairpin, wherein the press molding comprises press molding the head portion of the hairpin using a molding jig driven by a clamping device.
5 more elements
Dependencies are inferred from the claim text.