US 12,055,911 B2Granted

Method for offset measure compensation

AssigneeTRUMPF Werkzeugmaschinen GmbH + Co. KG

InventorsSimon Ockenfuss, Harald Mathias

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Abstract

A method for recognition and compensation of an offset measure between stamping coordinates of a stamping device and laser coordinates of a laser device in a combined stamping-laser machine for processing a plate-shaped workpiece, particularly a metal sheet, includes introducing a structure into the plate-shaped workpiece by respectively using the stamping device or the laser device. A measurement variable of the introduced structure is determined respectively by the laser device or the stamping device. The measurement variable is compared with an expected variable, and a deviation of the measurement variable from the expected variable corresponds to an offset measure. The offset measure is balanced with the coordinates of the laser device in the laser coordinate system or with the coordinates of the stamping device in the stamping coordinate system in order to compensate for the offset measure between the stamping coordinates and the laser coordinates.

Claims8

Dependent claims

a. using the stamping device or the laser device to introduce a structure into the plate-shaped workpiece;
b. using the laser device or the stamping device to determine a measurement variable of the introduced structure;
c. comparing the measurement variable with an expected variable to obtain a deviation of the measurement variable from the expected variable corresponding to an offset measure;
d. balancing the offset measure with the coordinates of the laser device in a laser coordinate system or with the coordinates of the stamping device in a stamping coordinate system to compensate for the offset measure between the stamping coordinates and the laser coordinates,
in step a. introducing a perforation into the workpiece by using the stamping device or the laser device;
in step b. determining a point unambiguously describing the perforation or a center point of the perforation, by using the laser device or the stamping device;
in step c. carrying out a process of determining whether a position of the determined center point corresponds to an expected position of the center point, and obtaining a deviation of the determined position from the expected position corresponding to an offset measure;
and
in step d., upon a determined deviation of the actual center point from the expected center point, carrying out a compensation of the offset measure by balancing the offset measure with the coordinates of the laser device in the laser coordinate system or with the coordinates of the stamping device in the stamping coordinate system to compensate for the offset measure between the stamping coordinates and the laser coordinates.

6 more elements

a. introducing a respective structure into the plate-shaped workpiece by using the stamping device and by using the laser device;
b. determining measurement variables of the introduced structures by using the stamping device or by using the laser device;
c. comparing the measurement variables with an expected variable to obtain a deviation of the measurement variables from the expected variables corresponding to an offset measure;
and
d. balancing the offset measure with the coordinates of the laser device in the laser coordinate system or with the coordinates of the stamping device in the stamping coordinate system to compensate for the offset measure between the stamping coordinates and the laser coordinates,
in step a. introducing a respective perforation into the workpiece by using the stamping device and the laser device;
in step b. determining a point each unambiguously describing the perforations or a respective center point of the respective perforation, by using the laser device or the stamping device;
in step c. carrying out a process of determining whether the position of the determined center points with respect to one another corresponds to an expected position of the center points with respect to one another, to obtain a deviation of the determined position of the center points with respect to one another corresponding to an offset measure;
and
in step d., upon a determined deviation of the actual position of the determined center points with respect to one another from the expected position of the center points with respect to one another, carrying out compensation of the offset measure by balancing the offset measure with the coordinates of the laser device in the laser coordinate system or with the coordinates of the stamping device in the stamping coordinate system to compensate for the offset measure between the stamping coordinates and the laser coordinates.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/600,707Filed 31 Mar 2020
Priority: DE 10 2019 108 388.51 Apr 2019
Published: US 2022/0187782 A116 Jun 2022
Granted: 6 Aug 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G05B 19/182
Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to…
G05B 19/404
Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to…
B21D 28/04
Punching blanks or articles with or without obtaining scrap ; Notching: centering the work; Positioning the tools
B21D 28/26
Perforating, i.e. punching holes: in sheets or flat parts