A description is given of a system for controlling the quality of products in output from a cutting machine, in particular a cutting machine used for cutting logs of sheet material, in particular paper, having at least one cutting disc (11) and a sharpening wheel (14), said control system comprising a PLC controller (20) suitable for controlling the cutting and sharpening process and an inspection system (S) suitable for scanning, at a specific time instant (t(k)), a set of quality values (Qout) of a roll (15) in output from the cutting machine, wherein a processing unit (D) receives said set of quality values (Qout) of the roll (15) in output and sends to the PLC controller (20) a command aimed at performing an action consisting of increasing or decreasing one of the following parameters: - sharpening time (∆tsharp) - sharpening frequency (fsharp) - differential speed (∆v) between said wheel (14) and said disc (11) based on the comparison between said set of quality values (Qout) and a reference quality value (Qsetpoint) and of the action carried out at the previous time instant (t(k-1)).
B24B 3/46 - Sharpening cutting edges, e.g. of toolsAccessories therefor, e.g. for holding the tools of cutting blades of disc blades
B26D 1/16 - Cutting through work characterised by the nature or movement of the cutting memberApparatus or machines thereforCutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis mounted on a movable arm or the like
B26D 5/00 - Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
B26D 7/12 - Means for treating work or cutting member to facilitate cutting by sharpening the cutting member
G05B 19/4065 - Monitoring tool breakage, life or condition
B24B 49/12 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
2.
CONTROL METHOD FOR CONTROLLING THE PROCESS OF SHARPENING OF A CUTTING BLADE IN A CUTTING MACHINE
A description is given of a control method for controlling the process of sharpening the cutting blade of a cutting machine, in particular a cutting machine used for cutting logs of sheet material, in particular paper, comprising at least one sharpening wheel, wherein said cutting blade and said at least one sharpening wheel are formed in an electrically conductive material and said at least one sharpening wheel is electrically insulated from the rest of the structure that forms the cutting machine and is controlled by a PLC controller, comprising the steps consisting of: bringing said at least one sharpening wheel close to said cutting blade in such a way as to cause the closure of a circuit when the contact between the two components establishes an electrical connection; measuring a contact signal in said circuit which depends on the quality of the electrical connection generated between sharpening wheel and cutting blade, this contact signal having zero value when no electrical connection is established; comparing the contact signal with a reference signal; and, alternatively sending an input signal to the PLC controller to launch a phase of sharpening of the cutting blade by acting on the sharpening wheel if the contact signal is greater than or equal to the value of the reference signal; launching a maintenance operation if the contact signal is lower than the value of the reference signal.
B26D 1/16 - Cutting through work characterised by the nature or movement of the cutting memberApparatus or machines thereforCutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis mounted on a movable arm or the like
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