Ball screw maintenance knowledge

The outer circulation means that the balls return to the screw nut through the spiral groove or intubation on the outer surface of the nut after the circulation process is over. (Through wire galvanized screw) The return methods of the outer circulation ball screw nut pair according to the ball circulation mainly include end cap type, intubation type and spiral groove type. Commonly used outer circulation method: end cap type; intubation type; spiral groove type. In the end cap type, a longitudinal hole is machined on the nut as a return passage for the balls. The cover plates at both ends of the nut have return ports for the balls, and the balls enter the return pipe to form a cycle. Intubation type, it uses an elbow as the return pipe. This structure has good manufacturability, but because the pipe protrudes from the nut body, the radial dimension is relatively large. Spiral groove type, it is a spiral groove milled on the outer circle of the nut, the two ends of the groove are drilled with through holes and tangent to the threaded raceway to form a return channel. This structure has a smaller radial size than the cannula structure, but Manufacturing is more complicated. The outer circulation structure and manufacturing process of the outer circulation ball screw are simple and widely used. The disadvantage is that it is difficult to smooth the joints of the raceways, which affects the stability of the ball raceways.

Screw maintenance

1. Lead screw manufacturers should return the lead screw (including structural parts) to the expenditure database and deposit it in a timely manner. When stacking in the open air, the site should be level and well drained, with supporting pads underneath, and covered with a thatch cloth. Accessories and parts can also be stored indoors.

2.All bent or deformed levers should be straightened first, and damaged components should be repaired before they can be put into storage, otherwise they should be replaced.

3.Lead screw manufacturers should regularly remove rust and anti-rust treatment on the components of the lead screw. Anti-rust paint should be applied once a year in places with high humidity, and ordinary ones can be painted once every two years. The fasteners should be oiled. The bolts should be galvanized to prevent rust. If there is no condition for galvanizing, it should be washed with kerosene after each use and coated with engine oil to prevent rust.

4.Tool-type scaffolding (such as portal frame, bridge frame, hanging basket, receiving table) needs to be repaired and maintained in time after removal, and supporting storage.

5.The fasteners, nuts, backing plates, bolts and other small accessories used by the screw manufacturers are easy to lose and damage. The redundant parts should be recycled and stored in time when they are installed, and they should be checked and accepted in time after they are removed.

6.Lead screw manufacturers establish a sound system for the issuance, recovery, reflection, and maintenance of lead screw tool materials. According to the principle of who uses, who maintains, and who manages, they can implement quotas or leases to reduce losses.