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US 2021/0362274 A1Published application
Coiling machine, method for manufacturing coil spring, and coil spring
AssigneeNHK Spring Co., Ltd.
InventorsTakuya SATO, Yuichiro YAMAUCHI, Takeshi FURUSE, Ryo TANAKA
Life of this patent
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Abstract
A coiling machine includes a laser heating machine configured to irradiate a wire formed into a helical shape with laser light to thereby heat a part of the wire, and cutting components configured to cut a portion of the wire after the irradiation of the laser light is stopped, a temperature of the portion being higher than before irradiated with the laser light.
Claims16
A coiling machine comprising:
- a laser heating machine configured to irradiate a wire formed into a helical shape with laser light to thereby heat a part of the wire;
- and
- cutting components configured to cut a portion of the wire after the irradiation of the laser light is stopped, a temperature of the portion being higher than before irradiated with the laser light.
A manufacturing method of a coil spring comprising:
- irradiating a wire formed into a helical shape with laser light to thereby heat a part of the wire;
- and
- cutting a portion of the wire after the irradiation of the laser light is stopped, a temperature of the portion being higher than before irradiated with the laser light.
A coil spring formed of a wire including a first end and a second end opposite to the first end, wherein
- the first end includes a first irradiation scar of laser light,
- the first irradiation scar includes a quench-hardened zone the hardness of which is higher than a base material of the wire, and a first heat affected zone which is positioned around the quench-hardened zone and the hardness of which is lower than the base material, and
- the first heat affected zone extends to at least a part of an end face of the first end.
Dependencies are inferred from the claim text.