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 - Agencements pour la manipulation des pièces, spécialement combinés aux machines-outils ou disposés dans ces machines ou spécialement conçus pour être utilisés en relation avec ces machines, p. ex. pour le transport, le chargement, le positionnement, le déchargement, le triage au moyen de glissières ou de plans inclinés
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
B21F 35/00 - Fabrication de ressorts en fils métalliques
B07C 5/342 - Tri en fonction d'autres propriétés particulières selon les propriétés optiques, p. ex. la couleur
B21F 3/02 - Enroulement des fils métalliques selon des formes particulières en hélice
2.
Method for verifying operative parameters of a selecting device of a spring forming machine, and spring forming machine
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 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
B21F 3/02 - Enroulement des fils métalliques selon des formes particulières en hélice
B21F 35/00 - Fabrication de ressorts en fils métalliques
G05B 19/042 - Commande à programme autre que la commande numérique, c.-à-d. dans des automatismes à séquence ou dans des automates à logique utilisant des processeurs numériques
B07C 1/00 - Opérations précédant le tri du courrier ou des documents selon la destination
B07C 5/10 - Séparation selon la dimension les mesures étant faites par des moyens photosensibles
3.
Spring forming device, method for forming a helical spring and corresponding computer program
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.