As high-precision transmission components,ball screws may encounter various problems during use,affecting the positioning accuracy,operation stability and service life of equipment.The common problems of ball screws in use are mainly concentrated in the following aspects:
I.Causes of Excessive Screw Clearance
1.Improper selection of bearings.
2.Excessive torsional displacement of the ball screw,mainly due to improper heat treatment,too thin hardened layer,or uneven hardness distribution.
II.Causes of Foreign Bodies in Ball Tracks
1.Impurities such as dust and chips enter the ball circulation track,causing jamming or scratching.
2.Packaging materials block the ball track,or processing chips enter the ball track.
3.Severe contamination:Failure of the dust seal allows a large amount of cutting fluid,metal dust and other pollutants to enter the interior.
4.Poor lubrication:Insufficient,dry,contaminated or incorrectly selected grease leads to increased friction between balls and tracks.
III.Fracture
1.Ball fracture in the screw:Temperature rise differences caused by lubrication actions can lead to ball fragmentation.
2.Ball damage:Individual balls are broken,hindering circulation.
3.Fracture of the screw shoulder,mainly due to improper design or bending of the screw journal.
Key Maintenance Points
-Lubrication is the lifeline:Regularly and appropriately supplementing or replacing special high-temperature and high-speed resistant grease is the fundamental way to prevent most failures."Faulty lubrication"should be avoided,and cleaning is required before refueling.
-Keep clean:Ensure the dust seal is intact,and install a protective cover according to the working environment to prevent dust,chips and other foreign bodies from invading.
-Standard installation:During installation,ensure the parallelism between the ball screw and the guide rail,and the coaxiality of the bearing seat,avoiding any radial force and bending moment.
-Avoid overtravel:It is strictly prohibited to let the nut exceed the effective stroke of the screw,otherwise it will lead to ball falling off or damage to circulation components.
-Regular inspection:Conduct regular visual inspection,movement smoothness inspection,noise inspection and clearance detection to detect and handle problems early.
The above are the common problems in the use of ball screws.If you have any other questions,please feel free to consult directly.
