Ball Screw Debasement Utilizing Precise Strategy

The ball screw is an imperative mechanical gadget that's broadly utilized to change over rotational movement to direct movement with tall accuracy. Application of ball screws can be found in numerous building frameworks which require exceptionally exact position control, such as the bolster drive framework for a machine apparatus and the tall accuracy leveling framework for aircrafts and rockets. In hone, it is found that the operation dangers may increment essentially as the ball screw get together debases over time, since the ball screw corruption can have a tremendous affect on the control exactness. For case, the preload misfortune will decrease the firmness of the ball screw get together and in the long run such kind of debasement would lead to position exactness misfortune. In this manner, guess of the ball screw holds incredible viable and scholastic esteem. Guess of the ball screw is inherently challenging due to the complex movement direction of the rolling components and the restricted space for sensor establishment. To screen the preload misfortune, one straightforward way is to introduce a constrain sensor to degree the no-load torque of the ball nut. Be that as it may, this strategy is rendered unreasonable due to the fetched of the constrain sensors and the complication of sensor establishment.

Fig. 1. Framework for the PHM analysis for the ball screw assembly.

Fig. 1. To justify the effectiveness, one accelerated life test analysis for ball screw degradation embraces two different methodologies – the physics based approaches and the data driven approaches. Previous research on physics based approaches dive deep into the fault mechanism and attempt to derive an equation of ball pass frequency (BPF) to study the preload loss. However, due to the complex motion trajectory of the rolling mechanism, an explicit function for BPF is intrinsically challenging and there is still no generally accepted equation for BPF.

To create a simplified visualization tool, many manufacturing industries prefer to use three different stages (Green Zone, Yellow Zone, Red Zone) to describe the health condition of machine tools or critical components. The Green Zone indicates that machine tools or critical components are in a healthy condition and that no further attention is needed for normal operation. The Yellow Zone indicates that machine tools or critical components are in a mildly degraded condition, and although they can still operate normally, potential failure would happen in the near future due to degradation, thus, further attention is needed. Finally, the Red Zone indicates that machine tools or critical components are in a faulty condition, they need to be replaced or repaired before being used in a production line.