Online fault detection system based on spindle box of numerical control gear milling machine and detection method thereof

Abstract

The invention discloses an online fault detection system based on a spindle box of a numerical control gear milling machine and a detection method thereof. The system comprises a mechanical detection module and an oil detection module, and is characterized in that the mechanical detection module comprises multiple vibration sensing modules which are arranged at the positions of an oil outlet and an oil inlet of the spindle box correspondingly, the vibration sensing modules are tightly attached to the box wall of the spindle box, and the connecting lines between the vibration sensing modules on the two sides are parallel to the axis of a spindle; and the oil detection module comprises multiple temperature sensing modules arranged near a driving shaft and a driven shaft correspondingly and multiple flow velocity detection modules arranged at the positions of the oil outlet and the oil inlet of the spindle box correspondingly, and the directions of the multiple flow velocity detection modules are the same and are opposite to the flow direction of oil in the spindle box. According to the system, all positions in the spindle box are comprehensively detected so that the fault position and the fault reason can be quickly positioned, and therefore an efficient fault maintenance mode can be conveniently determined.

Description

Technical field [0001] The present invention relates to the field of spindle box devices or fault detection, and more particularly to an online fault detection system based on a CNC mill spindle box and a detection method thereof. Background technique [0002] The spindle box is an important part of the machine, which is used to arrange the machine tool working spindle and its transmission parts and corresponding additional mechanisms. The spindle box is a complex transmission component including spindle assemblies, commutation mechanisms, transmission mechanisms, brakes, manipulation mechanisms, and lubricants. Its main role is to support the spindle and rotate it, realize the main shaft start, brake, shift and commutation and other functions, the spindle box adopts a multi-stage gear transmission, through a certain transmission system, the transmission gear in each position in the spindle box and The transmission shaft, finally transmits the motion to the spindle, enabling the ...

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Problems solved by technology

[0003]The common faults of the spindle box include mechanical mechanism faults and oil volume imbalance faults, mainly including: brake mechanism faults, valve core stuck due to long-term failure to clean the solenoid valve, The brake friction plate is worn, the surface is too smooth, too thin or has been broken, the brake pressure is too low, and the friction force between the friction plates is too small; the automatic speed change of the headstock spindle is not stable and impacts: control the automatic speed change of the headstock spindle The time relay when the electromagnet is powered off and on is out of order; the loosening of the screw causes the coupling on the coordinate axis of the machine tool to loosen; there is too much lubricating oil in the spindle box, which affects the braking friction between the friction plates, or the wear of the seal causes the lubricating oil loss of pressure

[0004] For various problems such as the above, in the process of machine tool operation, once the headstock is abnormal, maintenance personnel often need to disassemble and check the headstock to confirm its internal Whether there is mechanical damage, and the existence of the fault is often discovered after the fault causes product defects, resulting in a greater degree of damage. At present, there is no detection system that can monitor online in real time and quickly locate the cause of the fault

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