How to improve the motion performance of the guide rail during the processing of precision mechanical parts

In the processing of precision mechanical parts, in order to improve the motion performance of the air bearing guide, the following three methods can be used. The first is to improve the rigidity of the guide rail in the bearing direction. The guide rail structure design adopts a closed guide rail, which can increase the rigidity by 2 times compared with a single side; reduces the air float gap; and increases the force closure. The air source needs to be stabilized and clean. Supply air to reduce possible oscillation factors.
In the air supply circuit, it is necessary to design a load compensation mechanism and an automatic pressure regulating device to make the air float gap change very small, and the pressure spring and rollers control the air float gap; or rationally arrange the air cushion to allow it to automatically balance and adjust. , The accuracy of air flotation should be within 0.001-0.002mm.

Secondly, it can improve the damping force during the movement of the guide rail. The more holes of the air cushion, the greater the damping force and the greater the rigidity. If the powder metallurgical porous material is used as the air cushion, a large area of u200bu200bmicropores can replace the small hole throttle air cushion. , The damping force will be greater. When the processing of precision mechanical parts is allowed, gas-liquid two-phase lubrication can be used, and the damping force is increased due to the presence of oil film on the contact surface of the guide rail.

Semi-air-floating guide rails can also be used. The coordinate machine is a combination of air-floating guide rails and mechanical guide rails. It uses the advantages of the motion characteristics of the two guide rails, which not only improves the ability to resist end motion, but also maintains The air-floating guide rail has a constant clearance and increases the damping force of the guide rail movement, thereby improving the movement performance of the guide rail.

Usually, precision mechanical parts are processed. Machine tools are not suitable for working in dirty, high temperature and humid environments. The power supply environment of the power grid also has higher requirements. The power supply voltage of machine tools should not be less than ±10%, and the three phases are balanced and stable. Too bad power grids must be equipped with stabilized power supplies. In addition to the normal maintenance of cleanliness and lubrication, the machine tool must also be carefully maintained and its various components.