The present invention relates to a selecting device to be disposed downstream of a springs forming device of a springs forming machine. The selecting device may include an inlet adapted to receive springs formed in the springs forming device, outlets adapted to eject each of the springs from the selecting device, means for selectively conveying each of the springs entering the selecting device through the inlet towards the outlets, and means to form conduits to connect the inlet to the outlets. The selecting device may include means for generating a depression in at least one of the conduits and means for generating a compressed air flow directly inside the selecting device at one of the conduits.
B23Q 7/08 - Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of slides or chutes
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
A method is provided for verifying operative parameters of a selecting device of a machine for forming springs, configured for subdividing the springs formed by a spring forming device of a spring forming machine in at least one first group corresponding to springs having dimensional parameters falling into predefined tolerance values, and a second group corresponding to springs having dimensional parameters varying from the predefined tolerance values.
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
B21F 3/02 - Coiling wire into particular forms helically
eff); —generating a command signal such to vary, during the spring formation, the configuration of one of said one or more pitch tools (11, 13, 9) as a function of said error. Moreover, the present invention refers to a method for forming springs and a corresponding computer program.
The present invention refers to a spring forming device (1) comprising: a system (3) for feeding a wire (4) for forming a helical spring (2); a winding system (7) suitable for winding said wire (4) according to a helical configuration having a predefined diameter (D) extending along a helix development axis (A); one or more pitch tools (11, 13, 9), each suitable for acting on the wire (4) so that it takes on said cylindrical helix configuration with a predefined pitch (p); a system (15) for detecting the actual pitch of the spring forming in device (1) starting from said wire (4); means for detecting the amount (I) of the fed wire; a control unit configured for: • - determining the actual length (L eff) of the spring forming in the device starting from the actual amount of the fed wire (I) and actual pitch (p eff) detected for portions of the spring, already formed in the device; • - determining a reference length (L) as a function of said actual amount (I) of fed wire; • - determining an error between said reference length (L) and said actual length (L eff); • - generating a command signal such to vary, during the spring formation, the configuration of one of said one or more pitch tools (11, 13, 9) as a function of said error. Moreover, the present invention refers to a method for forming springs and a corresponding computer program.
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