Analysis method of numerical control lathe continuous fault propagation probability

Abstract

The invention discloses an analysis method of numerical control lathe continuous fault propagation probability. A main shaft, a guide rail and a tool rest in a to-be-analyzed numerical control lathe are involved, fault injection is carried out on the main shaft, the guide rail and the tool rest on the basis that the normal machining is guaranteed, then analyzing and detecting are carried out; thefault injection and measuring point selection of the main shaft comprises the step that 1, a magnet base is used for connecting with a magnetic base connecting rod, the magnet base is attracted on a machine tool lathe body, and one end of the magnetic base connecting rod penetrates into a spanner hole of an upper chuck. By adopting a fault injection method, motion coupling assemblies such as the main shaft, the guide rail and the tool rest in the machining process are taken as objects, the vibration information of each system component under a typical external circle machining working condition is collected, an energy operator is introduced, the fault propagation behavior characteristics among the components are evaluated by computing the vibration energy transmission efficiency, so that the continuous fault propagation probability evaluation of the numerical control lathe is realized.

Description

technical field [0001] The invention belongs to the technical field of continuous fault diagnosis and analysis of numerical control lathes, and in particular relates to a method for analyzing the probability of continuous fault propagation of numerical control lathes. Background technique [0002] The fault propagation probability of CNC machine tool components is an important parameter to evaluate its fault propagation behavior characteristics in the system and describe its fault propagation ability. Troubleshooting efficiency, a common method is to use fault injection, where fault injection is to artificially impose fault incentives on equipment when looking for fault propagation paths or evaluating fault propagation probability in the equipment’s fault-free working state, so as to cause equipment faults or accelerate system failure speed. [0003] The existing fault injection is to use the tapping method to inject faults when the spindle is in a state of high-speed rotat...

AI Technical Summary

Problems solved by technology

[0002] The fault propagation probability of CNC machine tool components is an important parameter to evaluate its fault propagation behavior characteristics in the system and describe its fault propagation ability. Troubleshooting efficiency, a common method is to use fault injection, where fault injection is to artificially impose fault incentives on equipment when looking for fault propagation paths or evaluating fault propagation probability in the equipment’s fault-free working state, so as to cause equipment faults or accelerate system failure speed

[0003] The existing fault injection is to use the tapping method to inject faults when the spindle is in a state of high-speed rotation. However, there are great safety hazards in actual operation, and the movement of the spindle is a vibration-sensitive component. Improper tapping will cause damage to the spindle. In the fault injection of other aspects, there is no better operation method, so there is a large room for improvement

Images