How to detect and repair screw rods in Sutong Machinery

The faults caused by ball screws are diverse and have no fixed pattern. Some faults are gradual and require a development process, which becomes increasingly severe with the increase of usage time; Sometimes it is a sudden malfunction, usually without obvious signs, but it occurs suddenly. This type of malfunction is caused by various unfavorable factors and the combined action of the outside world. So determining the true cause of the malfunction through correct detection is a prerequisite for fast and accurate maintenance. The layout plan and scheme of the trapezoidal screw whirlwind milling process, which involves completing threads and knurling in one go, have good promotion and application costs for products with low cost and low precision requirements.

Sutong Machinery: The number of heads of a multi head screw thread is the number of spiral lines that form the thread line

The lead of a multi head screw with multiple threads is twice that of a single thread screw with the same pitch. However, as the lead increases, the self-locking ability decreases.

Simply put, the comprehensive force is the normal force perpendicular to the thread, which decomposes into a single axis screw thread on the surface of the thread. Due to its small helix angle, it is not easy to slide, and the frictional force formed by the screw and nut rotation has a high self-locking ability. It is used for thread locking, such as fixing screws and nuts for ceiling fans, gas cylinder joints, and fixed connections between parts in mechanical equipment.

However, multi thread threads, due to their large thread angle, are prone to sliding and the friction formed by the screw and nut turning is relatively small, which is used to transmit power and motion. For example, jacks used to lift wheels for maintenance, table vises used to clamp workpieces for machining, and lathe screws used to process threads.

Ball screw is equipped with a gang ball between the screw and the nut, which has low friction and high transmission efficiency. Combined with a servo motor, it can achieve accurate movement. The accuracy reaches 0.001mm, which not only achieves the transformation from linear motion to rotational motion, but also from linear motion to rotational motion. With low wear and long lifespan, it can achieve synchronous motion.

Common faults of ball screws include wear, corrosion, and fatigue peeling on the raceways and ball surfaces of screws and nuts. Surface fatigue is caused by poor assembly, alternating loads, overloaded operation, poor lubrication, and other reasons. After long-term use, the raceway of the ball screw and the surface of the ball will have contact fatigue pitting and even the peeling of the metal surface, which will cause the ball screw to fail in motion and affect the accuracy and efficiency of the processed workpiece.

Therefore, improving the assembly quality of the ball screw bearing seat is crucial to extend the service life of the ball screw, reduce vibration, and improve machining accuracy.