Industrial robots are a new type of high-tech intelligent machine that can replace partial manual industrial production. A qualified industrial robot should be fast, accurate, and stable. Among them, industrial robots precision is the most important.

For the current robot production technology, it is easy to get robots to be fast and stable. But to be accurate at the same time is relatively difficult. Accurate refers to the repeatability precision of industrial robots. Robots repeat an action (usually 10-20 times), and the average deviation of each time from the planned position is its repeatability precision. Generally, a laser interferometer is required for measuring.

The accuracy of robots is a very important factor that directly affects product quality and productivity. The main factor affecting the accuracy of industrial robots is the bearings, so what kind of bearing design can make industrial robots achieve higher precision?

1. Design of Key Structural Parameters

Industrial robot bearings required to be with long life, high rigidity, and low friction. Therefore, when designing industrial robots, not only the maximum dynamic load rating should be considered, but also the optimal value of each structural parameter should be carefully selected. So as to improve the contact stress distribution of the bearing parts. This will help bearings to reach the optimum contact state for the formation of the lubricating oil film and improves bearings' service life.

2. The Design of Raceway

When an industrial robot bearing is under working condition, it must bear a certain axial load while receiving radial loads. If the axial load is too high, stress concentration will occur and the bearing ring will be worn, which will affect the accuracy.

4. Sealing Structure Design

The early damage of the industrial robots bearings is generally due to poor sealing performance. Contaminants can easily enter the bearings, thereby gradually failing the grease and causing bearing damage. Therefore, the sealing of the bearing is critical. When designing a sealed bearing, it is necessary to consider the sealing together with the specific working requirements and bearing structure. The lubrication of bearings for industrial robots is preferably greased by means of a lubrication method with a sealing structure or system.