Abstract: A point tool assembly includes a vertical moving table disposed on a forming table and movable in a direction parallel to the forming table surface and perpendicular to the feed direction of a wire, and a longitudinal moving table disposed on the forming table and movable in a direction parallel to the forming table surface and the feed direction of the wire independently of the vertical moving table. A link arm moves a parallel slide table and first and second inclined slide tables the same distance upon longitudinal movement of the longitudinal moving table. A forming table includes first and second independent tool drive units for supporting first and second point tools in positions where the first and second point tools oppose the wire and moving the tools in a direction substantially parallel to the forming table surface and substantially perpendicular to the feed direction of the wire and in a direction parallel to the forming table surface and the feed direction of the wire.

Abstract: A spring manufacturing apparatus in which the conventional cumbersome process of forming the front end of a quill in accordance with the shape of a desired spring is omitted, and one quill can be used in common for formation of springs having any shapes. A wire is fed out from a wire guide constituted by right and left members, two members symmetric with each other and having inclined surfaces. Tools that are radially arranged to be slidable toward a spring forming space and used for bending, curving, or cutting the wire are caused to abut against the wire to bend or curve it, thereby forming a spring. The spring manufacturing apparatus includes a rotary guide unit, a guide driving motor, tool driving motors, and a CPU. The rotary wire guide unit supports the wire guide and is rotatable about a wire feedout hole of the guide as the center. The guide driving motor transmits a driving force to the rotary wire guide unit. The tool driving motors slide the tools.

Abstract: A tool assembly 120 is attached on a forming table 101 movably in a vertical direction with respect to the forming table 101. The tool assembly 120 has a wedge tool assembly 140 which inserts a wedge tool between coils of wire W being continuously rolled by a coiling assembly 160 and growing coils having a predetermined pitch in an approximate normal-line direction with respect to the forming table 101, and a core block 123 which applies a cutting force to the wire W in cooperation with a cutting tool. This integrally moves the core block 123, the wedge tool and the like.

Abstract: A wire-grip mechanism 60 for gripping a wire W, is arranged rotatable in accordance with a wire guide 70 which feeds the wire W. By rotating a guide mechanism while feed rollers and wire grip mechanism 60 are gripping the wire W, the wire W positioned between the feed rollers and grip mechanism is twisted, and the direction of the wire W fed from the wire guide 70 is changed.

Abstract: A circular table is provided around a wire forming portion. A plurality of forming tool units are disposed on the surface of this circular table such that they are directed to almost the central position (wire forming portion) of the table. Each forming tool unit is movable along guide grooves formed in the surface of the circular table, and its position can be fixed. Therefore, the entering direction of the forming tool mounted to the distal end of the forming tool unit can be arbitrarily changed. Independent servo motors are respectively mounted to the forming tool units, and they can be driven independently of each other.

Abstract: A spring manufacturing apparatus for reducing the time from the beginning to the completion of the manufacturing of a spring having a flat end surface and for manufacturing a large amount of springs at a high-speed. Feed rollers 3a and 3b supply wire material 1 to point tools 4a and 4b. When a single spring is formed, laser output portion 7 is moved in an X direction by the spring pitch length and laser irradiation to the wire material 1 is started. At the same time, feed rollers 3a and 3b feed the wire material for one coil of spring to be manufactured.

Abstract: A spring manufacturing apparatus has a first mode in which a spring pitch is formed by inserting a wedge tool between coils of a wire material forcibly bent by a point tool, and a second mode in which the spring pitch is formed by pushing the bent wire material in a lateral direction. The first and second modes share the same driving source. The direction in which the wedge tool moves in the first mode and that in which the wire material is pushed in the second mode are substantially at right angles to each other, and therefore driving force in the first mode can be used also in the second mode by mounting on the apparatus a member that converts the direction of motion.

Abstract: Springs manufactured to have a desired free length nonetheless exhibit a slight difference in free length from one spring to another. This results from a change in elasticity caused by a difference in wire material or a non-uniformity in wire cross section from one lot of wire to another or within one and the same lot. A plurality of pre-manufacturing operations, respectively, produce a given number of test springs is used to determine an optimum value of a control variable which is then used in a manufacturing operation. In a pre-manufacturing operation, the difference between the desired free length and the actual free length is determined, and the amount of this difference is multiplied by the control variable to produce a feedback signal. The feedback signal determined for one spring is used to adjust the thrusting motion of a pitch tool for corresponding by adjusting the free length of a subsequent spring. Each pre-manufacturing operation is performed with a different value of the control variable.

Abstract: A coil spring manufacturing machine which is controlled by a micro-computer is described. Driving source of the coil spring manufacturing machine is a single motor. The power is divided into two independently controllable operation transmitting systems by a power dividing means. The one operation transmitting system transmits rotation to a mandrel assembly for winding a coil around a mandrel. The other operation transmitting system transmits a pitch movement to the mandrel assembly. Machining tools for the formation of coil spring legs are positioned around the mandrel assembly.