Chatter vibration suppressing method and machine tool
First Claim
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1. A method for suppressing chatter vibration of a machine tool which performs cutting work by rotating a rotating body including a workpiece or a tool according to a machining program stored in a storage unit, the method comprising:
- reading, with an NC device of the machine tool, the machining program stored in the storage unit and determining whether a value indicating a moment of inertia of the rotating body is stored in the machining program;
when a value indicating the moment of inertia is not stored in the machining program, acquiring, with the NC device, a moment of inertia of the rotating body and recording a value indicating the moment of inertia of the rotating body into the machining program;
calculating, with the NC device, a variable amplitude and a variable period when a rotation speed of the rotating body is varied in order to suppress chatter vibration from the value indicating the moment of inertia of the rotating body recorded in the machining program and a maximum input power of a motor adapted for rotating the rotating body; and
rotating the rotating body based on the calculated variable amplitude and variable period.
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Abstract
A chatter vibration suppressing method includes acquiring a moment of inertia of a rotating body, recording a value indicating the acquired moment of inertia into a machining program, and calculating a variable amplitude and a variable period when a rotation speed of the rotating body is varied in order to suppress chatter vibration from the value indicating the moment of inertia recorded in the machining program and the maximum input power of a motor for rotating the rotating body.
13 Citations
4 Claims
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1. A method for suppressing chatter vibration of a machine tool which performs cutting work by rotating a rotating body including a workpiece or a tool according to a machining program stored in a storage unit, the method comprising:
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reading, with an NC device of the machine tool, the machining program stored in the storage unit and determining whether a value indicating a moment of inertia of the rotating body is stored in the machining program; when a value indicating the moment of inertia is not stored in the machining program, acquiring, with the NC device, a moment of inertia of the rotating body and recording a value indicating the moment of inertia of the rotating body into the machining program; calculating, with the NC device, a variable amplitude and a variable period when a rotation speed of the rotating body is varied in order to suppress chatter vibration from the value indicating the moment of inertia of the rotating body recorded in the machining program and a maximum input power of a motor adapted for rotating the rotating body; and rotating the rotating body based on the calculated variable amplitude and variable period. - View Dependent Claims (2, 3)
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4. A machine tool for performing cutting work by rotating a rotating body including a workpiece or a tool according to a machining program stored in a storage unit, comprising:
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a unit configured to read the machining program stored in the storage unit and determine whether a value indicating a moment of inertia of the rotating body is stored in the machining program; a moment of inertia acquisition unit configured to acquire the moment of inertia of the rotating body when a value indicating the moment of inertia is not stored in the machining program; a recording unit configured to record the value indicating the moment of inertia of the rotating body into the machining program when the moment of inertia is acquired by the moment of inertia acquisition unit; a calculating unit configured to calculate a variable amplitude and a variable period when a rotation speed of the rotating body is varied in order to suppress chatter vibration from the moment of inertia of the rotating body recorded in the machining program and a maximum input power of a motor for rotating the rotating body.
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Specification