Ball Screw Common Problems And Cause Analysis
There are the following reasons for the abnormal and common fault damage of the ball screw:
Ball screw damage and cause analysis
Erosion is a form of material contact fatigue failure. When the steel ball rolls, an initial crack occurs in the region of maximum shear stress on the subsurface of the track. After repeated stressing, the cracks propagated to the surface of the material, and the material appeared as pits after peeling.
The main reason: the theoretical service life has been reached, and the load at the contact position is too high.
Ball screw damage and cause analysis
Water-containing liquids or in environments with high temperature difference and high humidity, water vapor causes rust spots on the screw, and even large areas of rust after long-term operation.
The main reason: high humidity environment, intrusion of aqueous solution, failure of grease protection.
Ball screw damage and cause analysis
Friction is inevitable when the screw is loaded. In the case of insufficient lubrication, frictional heat cannot be removed effectively and the lubricant cannot perform its normal function, resulting in overheating of the track surface and tan.
The main reason: poor lubrication and heavy load.
Ball screw damage and cause analysis
Excessive loads can cause unsatisfactory reflow of the steel balls, resulting in stress concentrations and abnormal wear on the track surface. After the material exceeds the acceptable range, the surface will eventually crack.
The main reason: excessive external shocks and abnormal circulation.
Ball screw damage and cause analysis
During operation, the shoulder of the screw is repeatedly subjected to bending forces, causing the initial crack to eventually break from A→B→C.
The main reason: the assembly deformation is too large, the shoulder geometric deformation is too much, and the shoulder strength is insufficient
Ball screw damage and cause analysis
In a high dust environment, the external dust cannot be effectively isolated to avoid intrusion into the nut. Long-term use can cause unsmooth operation and even block the oil return system.
The main reason: the particle size of the dust is smaller than the protective ability of the dust-proof accessories.
Ball screw damage and cause analysis
The cutting fluid, coolant and grease collide, resulting in abnormal grease failure and discoloration.
Main reasons: pipeline leakage, failure of protection, deterioration of grease.