Manufacturing method of compressor pulley
AssigneeHalla Climate Control Corporation
InventorsHeon Sang Lee, Seok Je Jeong, Gyeong Min Kim, Jong Mok Kim
Life of this patent
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Abstract
A compressor pulley having a partially cold forged base of improved strength and a bridge of improved strength is easily manufactured. Metal is heated to a predetermined temp and then hot forged into a pulley shape. A piercing step then forms a through hold in a center portion of the pulley. The heated pulley is then cooled to room temperature. Then the pulley is rough guided. A partial cold-forging step forges the base at room temperature. A slot is then pierced in the base portion. During a finishing step, groove working and grinding are performed on a surface of the pulley.
Claims4
A manufacturing method of a compressor pulley which comprises a circular plate-shaped base portion, and internal ring portion and external ring portion that are integrally formed with the base portion and protruded in a length direction of the compressor, comprising:
- a heating step which heats a metallic material to a predetermined temperature or more;
- a hot-forging step which forges the metallic material into a pulley shape having the base portion, the internal ring portion and the external ring portion at a high temperature;
- a center portion piercing step which forms a through-hole at a connecting portion so as to connect an inner surface of the internal ring portion;
- a cooling step which cools the heated pulley to a room temperature;
- a rough grinding step which processes inner and outer surfaces of the cooled pulley;
- a partially cold-forging step which forges the base portion of the pulley at a room temperature;
- a slot piercing step which forms a slot at the base portion;
- and
- a finishing step in which groove working and grinding are performed on a surface of the pulley.
Dependencies are inferred from the claim text.