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US 10,503,142 B2Granted
Method and device for controlling a milling machine
AssigneeDr. Johannes Heidenhain GmbH
InventorFrieder Kohler
Life of this patent
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Abstract
In a method for controlling a milling machine, a milling operation is able to be monitored on the basis of a temporally variable parameter of a numerical control in that the parameter is monitored for the exceeding or undershooting of a limit value during the milling operation. The method includes filtering out the tooth-meshing frequency in the time characteristic of the parameter (Iqnom).
Claims14
A method for controlling a milling machine, comprising:
- monitoring a milling operation with the aid of a temporally variable parameter of a numerical control;
- monitoring the parameter for exceeding or undershooting a limit value during the milling operation;
- filtering out a tooth-meshing frequency of a milling tool in a time characteristic of the parameter;
- and
- processing the parameter, measured in a fixed clock rate, by a scanning-rate converter, the scanning-rate converter outputting the parameter with a variable clock pulse for further processing;
- wherein the variable clock pulse corresponds to a multiple of the tooth-meshing frequency of the milling tool, the tooth-meshing frequency corresponding to a product of a rate of rotation of the milling tool and a number of cutting blades of the milling tool;
- and
- wherein the tooth-meshing frequency is filtered out of the parameter output with a variable clock rate by averaging, by a moving-average filter, across a number of values that corresponds to the multiple of the tooth-meshing frequency.
5 more elements
A numerical control for controlling a milling operation on a machine tool, comprising:
- a monitor unit adapted to monitor a temporally variable parameter of the numerical control with the aid of a limit value;
- an averaging filter adapted to filter out a tooth-meshing frequency of a milling tool from a time characteristic of the parameter;
- and
- a scanning rate converter adapted to process the parameter, measured in a fixed clock rate, and to output the parameter with a variable clock pulse for further processing;
- wherein the variable clock pulse corresponds to a multiple of the tooth-meshing frequency of the milling tool, the tooth-meshing frequency corresponding to a product of a rate of rotation of the milling tool and a number of cutting blades of the milling tool;
- and
- wherein the tooth-meshing frequency is filtered out of the parameter output with a variable clock rate by averaging, by a moving-average filter, across a number of values that corresponds to the multiple of the tooth-meshing frequency.
4 more elements
A numerical control for controlling a milling operation on a machine tool, comprising:
- a monitor unit for monitoring a temporally variable parameter of the numerical control with the aid of a limit value;
- an averaging filter for filtering out a tooth-meshing frequency of a milling tool from a time characteristic of the parameter;
- and
- a scanning rate converter for processing the parameter, measured in a fixed clock rate, for outputting the parameter with a variable clock pulse for further processing;
- wherein the variable clock pulse corresponds to a multiple of the tooth-meshing frequency of the milling tool, the tooth-meshing frequency corresponding to a product of a rate of rotation of the milling tool and a number of cutting blades of the milling tool;
- and
- wherein the tooth-meshing frequency is filtered out of the parameter output with a variable clock rate by averaging, by a moving-average filter, across a number of values that corresponds to the multiple of the tooth-meshing frequency.
4 more elements
Dependencies are inferred from the claim text.