The ball screw, composed of screw, nut, steel ball, preload plate, reverser and dust excluder It is an essential component in precision machine tools and one of the most widely used components in industry. In the process of long-term use, the ball screw will inevitably fail or stop moving, which will affect the normal operation of mechanical equipment and the final product quality. Next, we simply understand the reasons for the failure of the ball screw and the countermeasures.
The causes of ball screw failure can be classified into three categories: too large clearance, foreign matter entering the steel ball track and fragmentation. Among them, too many gaps are caused by improper installation, and failure to pre-stretch or adjust as required during installation, or failure to replace damaged parts during maintenance, may lead to ball screw failure.
Let's focus on the reasons why the gap is too large: when the ball screw is placed vertically, the nut will slip due to its own weight if it is not pre-pressed; Due to improper heat treatment of the steel ball, nut and screw shaft, the screw shaft will sag due to its own weight; If the screw support seat is improperly selected, the axial gap will occur, which will lead to failure. These are the reasons why the gap is too large, so we need to pay attention to it at all times in daily use.
In addition, when the ball screw is subjected to repeated bending and shear stress for a long time, it will lead to the generation and propagation of fatigue cracks and eventually fracture. Poor lubrication and overload will lead to increased wear of the ball screw and the screw, and it is easy to bend and deform, which will affect the performance and life of the ball screw.
The above are the common reasons for the failure of the ball screw. In order to ensure that the ball screw can run normally for a long time, it must be operated in strict accordance with the installation requirements, lubricated and cleaned regularly to reduce wear and corrosion. If the ball screw fails, the damaged parts must be replaced in time.
In actual production, the processing technology of ball screws is very important, and the material, steel and surface treatment technology can effectively improve the wear resistance and accuracy of the screw. Secondly, the manufacturing technology, using high-precision processing equipment and technology, such as precision grinding and ultra-precision grinding, can ensure the straightness and smoothness of the ball screw. Finally, installation and debugging. Accurate installation and adjustment can reduce the error between the ball screw and other parts of the machine tool and ensure the high-precision operation of the whole equipment system. Please contact us if you have any other questions or purchasing needs.
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