Patent EP-2022595-B1 (EP)
Inventor: GRUENBERGER THOMAS
IPC: G05D3/20
Filed: 2008-07-17
Granted: 2010-10-20
Abstract: The method for adjusting and/or controlling machining position and/or actual point (3) of the machining of a machining tool guiding a workpiece (11) against relative movement, comprises determining a first point on the machining parameter subjected by the machining tool in a given short time interval and a second point on a given machining web (5) corresponding to a rectilinear or arc on the workpiece to be processed. Between the points, a connecting line is calculated and/or erected that is straight line and corresponds its form and its progress after the arc-shaped machining web. The method for adjusting and/or controlling machining position and/or actual point (3) of the machining of a machining tool guiding a workpiece (11) against relative movement, comprises determining a first point on the machining parameter subjected by the machining tool in a given short time interval and a second point on a given machining web (5) corresponding to a rectilinear or arc on the workpiece to be processed. Between the points, a connecting line is calculated and/or erected that is straight line and corresponds its form and its progress after the arc-shaped machining web. The normal interval determines the actual point of the machining from the connecting line and is used as correcting variable and/or measure for the calculation of a correction value for adjusting the machining tool in the direction of the connecting line and the machining web. The normal interval is used as correcting value and/or deviation for a proportional integral derivative control of the position of the actual point of the machining tool. The position of the first and second point and/or the machining position are determined with a reception unit under use of image processing- and image evaluation procedure in joined and/or simultaneous manner. The determination of the position of the first and the second point is carried out on the machining parameter by grey-tone- or color image evaluation process and/or triangulation method. The actual point of the machining is determined with grey-tone or color image evaluation process. The predetermined machining is electron beam welding process and the machining parameter is welded seam (4). A point lying on the longitudinal center or its side edge or a point lying within a given distance range from the longitudinal center or its side edge is determined as the first point and a point lying on the given joining web and/or in its longitudinal center or a line within a given distance range from its longitudinal centre or a point lying on its line or within a given distance range of the line is determined as second point. The adjustment of the machining tool is carried out when the correcting variable and/or the correction value exceeds a given threshold value. The welding seam in a certain given interval of the machining position on the machining parameter, and the point lying the machining web are used as first and the second point. An independent claim is included for a device for adjusting and/or controlling machining position and/or actual point of the machining of a machining tool guiding a workpiece against relative movement.