TH2201006198A - Method for judging the components of a torque wrench having mechanical action at the point of guide of the cutter blade for a cutting machine - Google Patents

Abstract

DEPCT66 The invention relates to a method for determining the components of a torque meter having mechanical action at the point of guidance of a cutting blade (L) for a cutting machine where said blade is guided in a press plate (P) of the cutting head of said machine, wherein said method comprises determining the position of a dynamometer having five sections on the press plate, wherein said dynamometer comprises plurality of sensors for determining the frontal force, lateral force, rolling moment, pitch moment and deflection moment of the cutting blade, constructing a calibration matrix of the dynamometer and determining the value of the force in three dimensions which the cutting blade receives based on the measurements obtained from the sensors and the calibration matrix.

Claims (9)

1. DEPCT66 1. A method for determining the components of a torque meter having mechanical action at the point of guidance of a cutter blade (L) for a cutting machine, where said blade is guided in a press plate (PP’P”) of the cutting head of said machine, comprising positioning a dynamometer having five components on the press plate, where said dynamometer comprises a plurality of sensors capable of determining the values of the frontal force, lateral force, rolling moment, pitch moment and deflection moment of the cutter blade, constructing a calibration matrix of the dynamometer and determining the three-dimensional forces received by the cutter blade based on the measurements obtained from the sensors and the calibration matrix. 2. The method of claim 1, wherein the step of developing a matrix for the calibration of the dynamometer comprises developing a matrix for the calibration of a theoretical dynamometer sensor with varying theoretical stresses as a function of the six components of the dynamometer. 3. The method of claim 2, wherein said step of developing a matrix for the calibration of the dynamometer further comprises calculating a matrix of the response of the dynamometer sensors varying in actual stress as a function of six components of the dynamometer based on the theoretical calibration matrix and measuring the actual response of the dynamometer sensors. 4. The method of claim 3, wherein the dynamometer sensor response matrix is calculated by a linear optimization method. 5. The method of any one of claims 1 to 4, wherein said dynamometer comprises three triaxial piezoelectric sensors (1, 2, 3) mounted in a press plate (P) distributed about the longitudinal axis (Z) of the blade. 6. The method of any one of claims 1 to 4, wherein said dynamometer comprises at least three bridge circuits of strain gauges connected together (J1 to J3) mounted on a press plate arm (P') that are positioned in an orderly manner about the longitudinal axis (Z) of the blade so as to provide at least three full bridge circuits. 7. The method of claim 6, wherein the dynamometer comprises six strain gauge bridge circuits, which are arranged in an orderly manner about the longitudinal axis (Z) of the blades so as to form six full bridge circuits. 8. The method according to any one of claims 1 to 4, wherein the dynamometer comprises at least five uncoupled strain gauge bridge circuits (P1 to P5) mounted on a press plate (P”). 9. A method according to any one of claims 1 to 8 wherein the transmission of the measurement to the dynamometer sensor is performed non-contact or by means of wires.