A Method of Measuring the Vibration Displacement of Tool Nose Point

Abstract

The invention discloses a method for measuring the vibration displacement of a tool nose point, and belongs to the field of cutting. The method comprises the steps that S1, a vibration acceleration frequency-response function curve of the tool nose point and a plurality of position points on a machine tool spindle is obtained; S2, a plurality of vibration displacement conduction functions between the tool nose point and the position points are obtained through calculation; S3, the actual vibration displacement of the tool nose point and the position points in the continuous vibration process is obtained through measurement, a plurality of vibration displacement calculation values of the tool nose point are obtained through calculation according to the vibration displacement conduction functions, the optimal vibration displacement calculation value closest to the actual vibration displacement of the tool nose point is selected, and the optimal vibration displacement conduction function and the optimal position point on the machine tool spindle are obtained through selection; S4, the vibration displacement of the optimal position point in the actual machining process is measured, and the vibration displacement of the tool nose point in the actual machining process is obtained through calculation. According to the method, the vibration displacement of the tool nose point can be obtained online, and the measuring process is not influenced by cuttings or cutting liquid.

Description

technical field [0001] The invention belongs to the field of cutting processing, and more specifically relates to a method for online measuring the vibration displacement of a tool tip point during milling processing. Background technique [0002] Vibration during machining can reduce the shape accuracy and surface accuracy of workpieces, reducing tool life and productivity. Tool tip vibration displacement is the most direct characterization of cutting vibration. Online acquisition of tool tip vibration displacement is of great significance for cutting force control and chatter suppression. [0003] The Chinese patent with the application number 200910198798.4 discloses a milling tool vibration measuring instrument developed by Liu Xiaodong of Tongji University. The vibration acceleration sensor is installed on the tool handle to measure the vibration acceleration of the tool during processing. The power supply system of the sensor adopts the inductive power supply method ,...

AI Technical Summary

Problems solved by technology

[0007] For the above defects or improvement needs of the prior art, the present invention provides a method for measuring the vibration displacement of the tool tip point. The vibration displacement transfer function between is the best vibration displacement transfer function, and the vibration displacement of the tool tip point is obtained by calculating the best vibration displacement transfer function and the vibration displacement of the best position point, thus solving the problem that cannot be truly measured in the prior art The vibration displacement of the tool tip or the technical problem that the measurement system is too complicated

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