Abstract: A method and apparatus are provided for forming the linear springs. In the apparatus three or more forming tools are arranged radially about the center of the quill for guiding the linear material are rotated within a predetermined angle about the centerline of the quill and are simultaneously advanced in the extension direction of the centerline of the quill perpendicular or substantially perpendicular to the centerline of the quill of the quill and collided against the linear material fed from the tip end portion of the quill to thereby always perform the formation of the linear spring, the apparatus being suitable for embodying this method is provided.

Abstract: A process for making coiled springs by intermittently rotating feed rollers with a wire held therebetween to feed the wire through a wire guide into engagement with a bending die at the outlet of the wire guide, thereby coiling the wire is provided, wherein as a follower of a cam unit moves toward the base circle of a pitch cam by the force of a spring, a pitch tool extends in an extending direction for pitching, and as the follower of the cam unit moves away from the base circle of the pitch cam against the force of the spring, the pitch tool is retracted in a retracting direction, whereby pitching is completed.

Abstract: A process for making coiled springs by intermittently rotating feed rollers with a wire held therebetween to feed the wire through a wire guide into engagement with a bending die at the outlet of the wire guide, thereby coiling the wire is provided, wherein as a follower of a cam unit moves toward the base circle of a pitch cam by the force of a spring, a pitch tool extends in an extending direction for pitching, and as the follower of the cam unit moves away from the base circle of the pitch cam against the force of the spring, the pitch tool is retracted in a retracting direction, whereby pitching is completed.

Abstract: A coiled spring making apparatus is provided, including a coiling section for forming coiled springs and a progressive forming section for progressively feeding the coiled springs formed at the coiling section to a plurality of stages on which the coiled springs are held and successively formed into the desired shape. The coiling section is of a bending die system of coiling section at which the coiled springs are formed with their axes kept vertical, and is mounted on a movable table which is movable to any position horizontally or transversely with respect to the progressive forming section and fixed there.

Abstract: A method of manufacturing a coil spring wherein, an amount of sway of a connecting body connected to a swaying body to be swayed by a cam or a crank driven by a driving shaft rotating at a constant speed in order to drive at least one or more means among those for changing a pitch of active coils, forming the end portion, changing the shape of cross-section of the active coils and cutting wire material is converted into a pulse signal and is then measured on the occasion of manufacturing a coil spring and a DC servo motor which drives and rotates a core bar or pressurized co-roller for supplying a wire material to the coil forming portion is driven by such pulse signal in order to form a total coils of a coil spring.

Abstract: Apparatus for manufacturing solid tension coil springs providing loops at both ends with excellent productivity under the condition that shape of loop, facing angle of loops at both ends and number of turns between the loops are respectively set accurately to the desired values characterized in that on the occasion of forming a solid tension coil portion by sending the wire material and abutting it in contact with the bending dies, when the end portion of the solid tension coil formed abuts in contact with the contact type sensor for control, sending of wire material is stopped and thereby a solid tension coil spring in the desired number of turns can be manufactured, then the coil spring is cut on the side of bending dies in the condition that said coil spring is held, thereafter said coil spring is sent to the next stage while it is held, and while the next coil spring is being manufactured, both loops are formed by raising simultaneously both ends of the solid coil spring being held.