Intelligent monitoring system for milling chatter of numerical control milling machine

Abstract

The invention provides an intelligent monitoring system for milling chatter of a numerical control milling machine. Data acquired by an acceleration sensor, a sound sensor and a current sensor is transmitted to a signal conditioning circuit at a wireless data acquisition front end through a signal line; the signal conditioning circuit filters and amplifies the signals and sends the signals to an AD converter of the wireless data acquisition front end; data passing through the AD converter is sent to a main control chip of the wireless data acquisition front end through SPI communication; the data is packaged again after being processed and sent to an AI processing platform formed by an RK3399Pro artificial intelligence processor through a USB; online simulation training is carried out on the data through TensorFlow to obtain an optimal deep learning model; and the optimal deep learning model is deployed on an RK3399Pro platform to intelligently detect the milling chatter of the numerical control milling machine. According to the wireless data acquisition front end, a wireless sensor network is established in a multi-hop self-organizing networking mode, the acquisition front end establishes the network and joins the network rapidly, the nodes achieve self-adaptive networking, the wireless transmission delay is short, and the data is safe.

Description

technical field [0001] The invention belongs to the field of machine tool cutting chatter monitoring, and in particular relates to an intelligent monitoring system for milling chatter vibration of a numerically controlled milling machine. Background technique [0002] During the production process of the machine tool, vibration will inevitably occur due to the interaction between the tool and the workpiece, and the vibration will affect the surface quality of the product. When the vibration exceeds a certain limit, especially when self-excited vibration occurs, it will seriously affect the product quality. Cutting vibration is the result of the contact and interaction between the tool and the workpiece during the metal cutting process. Its causes, occurrence and development rules are inherently related to the cutting process itself and the dynamic characteristics of the metal cutting machine tool. The vibration of the tool relative to the machined surface of the workpiece w...

AI Technical Summary

Problems solved by technology

The vibration of the tool relative to the machined surface of the workpiece will cause vibration marks on the machined surface, which not only seriously affects the processing quality but also easily causes tool wear. In severe cases, chipping will occur and the cutting process cannot continue

The high-frequency vibration that occurs during the cutting process causes noise pollution and endangers the physical and mental health of the operator

[0003] In the field of CNC machining, although our country has realized the application of some difficult-to-machine materials on high-speed CNC lathes, due to the influence of cutting chatter, the relative vibration between the milling cutter and the workpiece will not only reduce the machining accuracy and production efficiency, but also aggravate the milling process. Tool wear, serious or even damage to the machine tool spindle, still cannot improve production efficiency, so it is necessary to conduct in-depth research on cutting chatter to solve the problems faced in the processing field

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