Condition Monitoring of Ball-Screw Drives Based on Frequency Shift

2020 ◽  
Vol 25 (3) ◽  
pp. 1211-1219
Author(s):  
Tiandong Xi ◽  
Sebastian Kehne ◽  
Tomoya Fujita ◽  
Alexander Epple ◽  
Christian Brecher
Keyword(s):  
Frequency Shift ◽  
Condition Monitoring ◽  
Ball Screw ◽  
Ball Screw Drives

Integration von Machine Vision in Kugelgewindespindeln*/Integration of machine vision in ball screw drives – Integrated system for condition monitoring of ball screw drives

2019 ◽  
Vol 109 (07-08) ◽  
pp. 605-610
Author(s):  
T. Schlagenhauf ◽  
J. Hillenbrand ◽  
B. Klee ◽  
J. Fleischer
Keyword(s):  
Early Detection ◽  
Machine Vision ◽  
Condition Monitoring ◽  
Machine Tools ◽  
Integrated System ◽  
Ball Screw ◽  
Camera System ◽  
Ball Screw Drives

Unvorhergesehene Maschinenausfälle von Werkzeugmaschinen durch natürlichen Verschleiß sind häufig auf den Kugelgewindetrieb zurückzuführen. Für eine frühzeitige Erkennung der auftretenden Schäden, präsentiert dieser Beitrag einen Ansatz für die Überwachung von Spindeln von Kugelgewindetrieben mittels integriertem Kamerasystem. Ziel ist die frühzeitige Detektion von Schäden, die auf der Spindeloberfläche erscheinen, um entsprechende Wartungsmaßnahmen abzuleiten.   Unforeseen failures of machine tools due to wear are often caused by ball screws. To allow for an early detection of damage, this article presents an approach for monitoring ball screw spindles using an integrated camera system. The aim is to detect initial defects that appear on the spindle surface and derive appropriate maintenance measures.

Integrated Diagnostic and Preload Control for Ball Screw Drives by Means of Self-Sensing Actuators

2013 ◽  
Vol 769 ◽  
pp. 271-277 ◽  
Author(s):  
Christopher Ehrmann ◽  
Stefan Herder
Keyword(s):  
Signal Processing ◽  
Economic Integration ◽  
Machine Tools ◽  
Processing System ◽  
Ball Screw ◽  
Measured Signal ◽  
Mechatronic Systems ◽  
Signal Processing System ◽  
High Flexibility ◽  
Ball Screw Drives

Piezoelectric ceramics can be used as sensors, as well as actors. The concept of a self- sensing-actuator tries to use both modes of operation in one device, allowing the economic integration of mechatronic systems. Possible fields of application are ball screws of machine tools, where wear-induced degradation of the preload can be compensated. Furthermore, the signal processing part of such a system can be used to gather information related to the condition of the ball screw. Both excitation signal generation and filtering of the measured signal have to offer high flexibility and signal fidelity. In this article the concept of a power amplifier and its corresponding signal processing system are presented.

Control of ball screw drives based on disturbance response optimization

CIRP Annals ◽  
2013 ◽  
Vol 62 (1) ◽  
pp. 387-390 ◽  
Author(s):  
Kaan Erkorkmaz ◽  
Yasin Hosseinkhani
Keyword(s):  
Ball Screw ◽  
Disturbance Response ◽  
Response Optimization ◽  
Ball Screw Drives

Reduction of Vibrations in Ball Screw Driven Machine Tools by the Optimal Selection of Nut Parameters

2012 ◽  
Author(s):  
Chinedum E. Okwudire ◽  
Peng Zhao
Keyword(s):  
Sustainable Manufacturing ◽  
Helix Angle ◽  
Ball Screw ◽  
Lateral Bending ◽  
Structural Vibrations ◽  
Bending Vibrations ◽  
Lateral Vibrations ◽  
Ball Screw Drives ◽  
Degree Of Coupling ◽  
Selection Of

Due to the growing need for sustainable manufacturing processes, machine tool designers are constantly looking for ways to reduce unwanted structural vibrations without having to increase the mass/inertia of moving components, which in turn increases the energy consumption and cost of the machines. Recent research has shown that, due to the coupling introduced by the nut, the torque applied to ball screw drives by the motor causes undesirable lateral (bending) vibrations of the screw, which adversely affects the fatigue life and positioning accuracy of ball screw drives. By analyzing the stiffness matrix connecting the screw to the nut, this paper shows that the helix angle of the screw and the entry/exit angles of the balls have the most influence on the degree of coupling between motor torque and lateral vibrations of the screw. Consequently, by carefully selecting the helix angle of the screw together with the entry/exit angles of the balls, the undesirable lateral vibrations of the screw can be minimized, without having to increase the diameter (i.e. stiffness/inertia) of the ball screw. The merits and limitations of the proposed method are demonstrated using simulations on a single-axis ball screw driven machine.

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