The present invention relates to a hot coiling machine, and an object of the invention is to provide a hot coiling machine that produces coil springs having various coil shapes and diameters from a heated wire without a mandrel. The present invention provides a hot coiling machine including: a center roll rotating by a drive unit; a feeding roll disposed near the center roll and facing an external surface of the center roll, the center roll being configured to move by a first positioning unit and being rotated by a drive unit thus moving a wire together with the center roll; a forming roll for forming the wire into a coil shape; and a pitch control unit disposed near the forming roll to come into contact with the coiled wire and pushing the coiled wire to provide the coiled wire with a desired pitch.

The present invention relates to a hot coiling machine, and an object of the invention is to provide a hot coiling machine that produces coil springs having various coil shapes and diameters from a heated wire without a mandrel. The present invention provides a hot coiling machine including: a center roll rotating by a drive unit; a feeding roll disposed near the center roll and facing an external surface of the center roll, the center roll being configured to move by a first positioning unit and being rotated by a drive unit thus moving a wire together with the center roll; a forming roll for forming the wire into a coil shape; and a pitch control unit disposed near the forming roll to come into contact with the coiled wire and pushing the coiled wire to provide the coiled wire with a desired pitch.

Provided is a bending device that includes a processing part having two protruding parts that protrude from an end surface of a pillar part and that bend a wire, a rotary part that supports the processing parts and rotates about an axis intersecting the length direction of the pillar part, an accommodating part that is cylindrical and accommodates the rotary part at an end part of the accommodating part so as to be rotatable, and a mechanism that rotates the accommodating part about an axis of the accommodating part.

Provided is a bending device that includes a processing part having two protruding parts that protrude from an end surface of a pillar part and that bend a wire, a rotary part that supports the processing parts and rotates about an axis intersecting the length direction of the pillar part, an accommodating part that is cylindrical and accommodates the rotary part at an end part of the accommodating part so as to be rotatable, and a mechanism that rotates the accommodating part about an axis of the accommodating part.