Cutter abrasion monitoring method based on cutting force model

Abstract

The invention discloses a cutter abrasion monitoring method based on a cutting force model. The cutter abrasion monitoring method is used for conducting real-time online monitoring on the abrasion loss of a cutting tool. The cutter abrasion monitoring method is characterized by comprising the steps that 1, cutting force caused by chip forming under the action of a sharp cutter in the cutting process is calculated by means of a non-equant shearing region model; 2, plowing force caused by cutting edge roundness in the cutting process is calculated; 3, cutter cutting force is obtained according to the determined cutting force under the action of the sharp cutter and the determined plowing force caused by cutting edge roundness; 4, a cutter abrasion monitoring model is established according to the obtained cutter cutting force, and therefore real-time monitoring on cutter abrasion is achieved. By means of the cutter abrasion monitoring method based on the cutting force model, the cutter abrasion state can be accurately represented, monitoring on the cutter abrasion can be achieved by monitoring the cutting force, and therefore real-time online and accurate monitoring of the cutter abrasion is achieved.

Description

technical field [0001] The invention belongs to the field of tool wear monitoring and relates to a tool wear monitoring method based on a cutting force model. Background technique [0002] During the cutting process of the workpiece, the tool will be worn, and the wear of the tool will cause the geometric shape of the tool to change, so that the workpiece will have a dimensional deviation and affect the processing quality of the workpiece. In order to avoid excessive deviation of the workpiece and improve the processing quality, it is necessary to monitor the wear of the tool, and determine whether to change the tool according to the monitoring results. [0003] The commonly used method of monitoring tool wear is the direct monitoring method, which is mainly detected by directly measuring the average wear amount of the middle part of the flank wear zone. Since the direct monitoring method needs to continuously measure the tool wear during monitoring, it will interrupt the p...

AI Technical Summary

Problems solved by technology

However, in actual monitoring, due to the interference of vibration and random noise, it is easy to make mistakes when using this method to judge tool wear, resulting in misjudgment

Moreover, due to the uncertainty of the boundary between normal wear and abnormal wear of the tool, it is difficult to determine the threshold in advance. It must be determined based on experience and many experiments, and the threshold is not stable in different occasions.

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