An intelligent monitoring system for milling chatter of CNC milling machine

Abstract

The invention provides an intelligent monitoring system for milling chatter of a numerically controlled milling machine: an acceleration sensor, a sound sensor and a current sensor are used to transmit the collected data to the signal conditioning circuit of the wireless data acquisition front end through a signal line, and the signal conditioning circuit filters the signal. , amplification and other processing are sent to the AD converter of the wireless data acquisition front-end, the data after the AD converter is sent to the wireless data acquisition front-end main control chip through SPI communication, after processing, it is packaged again and sent to the RK3399Pro artificial intelligence processing by USB The AI ​​processing platform composed of the CNC milling machine performs online simulation training on the data through TensorFlow to obtain the optimal deep learning model, and deploys it on the RK3399Pro platform to intelligently detect the milling chatter of the CNC milling machine. The wireless data acquisition front end of the present invention establishes a wireless sensor network in a multi-hop self-organizing networking mode, the acquisition front end forms and joins the network quickly, and the nodes are adaptively networked, 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, in particular to an intelligent monitoring system for CNC milling machine milling chatter. 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 have an impact on 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 mutual contact and interaction between the tool and the workpiece in the process of metal cutting. The cause of its occurrence and the law of occurrence and development are intrinsically related to the cutting process itself and the dynamic characteristics of metal cutting machine tools. The vibration of the tool relative to the machined surface of the workpiece will ...

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

Images