High-sensitivity precise monitoring method for high-speed broaching machining

Abstract

The invention discloses a high-sensitivity precise monitoring method for high-speed broaching machining. The high-sensitivity precise monitoring method includes the following steps that firstly, noisesignals Ai, pressure signals pi, cutting force signals fi and vibration signals ai under the normal working condition and various types of abnormal working conditions are obtained when cutter teeth conduct cut-in or cut-out in the part machining process, wherein i=1, 2, 3, 4, 5; analysis on the signals mentioned above is used as the basis for judging the actual working condition, and then the working condition during machining can be accurately monitored; and different measures are taken according to the different abnormal working conditions. According to the high-sensitivity precise monitoring method, by analyzing the noise signals, the pressure signals, the cutting force signals and the vibration signals under the different working conditions, signal relation characteristics under the different working conditions are obtained, the working condition type during actual machining is judged through the signal relation characteristics, and therefore corresponding judgment can be conducted according to the different working condition types. According to the high-sensitivity precise monitoring method, monitoring of the different abnormal machining working conditions is achieved throughthe novel signal processing method.

Description

technical field [0001] The invention relates to the field of machine tool monitoring, in particular to a high-sensitivity and precise monitoring method for high-speed broaching. Background technique [0002] At present, in high-speed cutting, abnormal factors such as the geometric structure and cutting angle of the tool, the thermal mechanical processing load of the workpiece material of the tool and its contact friction, cutting parameters, and the wear of the tool will cause the chip to be difficult to break and the chip to stick to the surface. On the tool, it will lead to an increase in cutting force, an increase in cutting temperature, abnormal wear of the tool, and a decrease in the surface quality of the workpiece. Different from turning and milling, in broaching, chips are formed and stored in a limited space in the chip pocket of the broach. After the cutting teeth are separated from the workpiece, it is possible to break away from the contact with the tool. During...

AI Technical Summary

Problems solved by technology

However, the existing processing monitoring methods are difficult to meet the requirements of distinguishing different processing abnormalities.