Spring Forming Device, Method For Forming A Helical Spring And Corresponding Computer Program

摘要

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.