Siemens Aktiengesellschaft

Wilhelm Westermeyer

Wolfgang Papiernik

Wolfgang Speth

Bernd Quaschner

Elmar Schaefers

Theo Reichel

Martin Munz

Georg Wiegaertner

Rui Huang

A process and device for computer-aided adaptation of an application program for a machine tool is described. A sequence of control commands for feed axes of the machine tool defines a contour to be traveled by a tool relative to a workpiece. Based on the sequence of control commands, a computer determines sequential instructions for a round axle of the machine tool to track the contour and determines if, and possibly at which locations, the contour has angular or curvature discontinuities. When such angular or curvature discontinuities occur, the computer determines sequential instructions, so that the round axle begins to start accelerating before the angle or curvature discontinuities occurs, and the acceleration of the round axle terminates only after the angle or curvature discontinuity has ended.

Processes and devices for computer-aided adaptation of an application program for a machine tool

A tool feeding speed profile is directly programmable, feeding speed minimums across the control blocks being used in advance in the event that the admissible axis dynamics are exceeded by the predefined feeding speed profile. The tool feeding speed profile can be programmed, in particular, as a linear, polynomial, or cubic feeding speed profile, the latter being predefinable over a sequence of control blocks as a feeding speed polynomial or a feeding speed spline by interpolation or approximation.

Method and device for controlling a tool feed

A critical resonant frequency (f ) of the axes of a moving machine element is damped as effectively as possible with the aid of a jerk limitation. Good damping in the case of a desired frequency is achieved when the longest possible time (TrLim) which can be traveled with a maximum permissible jerk (rLim) is selected such that 1/TrLim coincides with the lowest natural frequency (f ) of the participating axes. This finding is implemented by adapting the path dynamics such that the TrLim&equals;aMax/rLim yielded by the prescribed dynamics limiting values is varied by reducing the maximum jerk (rLim) to achieve good damping results for the lowest natural frequency (f ) of the participating axes.

Jerk-limitation with adaptation of the path dynamics

Speed control for any override range effective over a plurality of blocks

Velocity control with limited jolting

Method for limiting axial accelerations without contouring errors

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Nürnberg, Germany

Wilhelm Westermeyer