In how to improve the motion performance of the guide rail in the machining 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; firstly, the rigidity of the loading direction of the rail is improved. The design of the guideway structure uses a closed guideway. This can improve twice the rigidity than single side. Reduce the air uplift gap; In addition, it is necessary to increase the strength of the closed, stable air supply, clean air supply and reduce the possible vibration factor.
In the air supply circuit, design the load compensation mechanism and automatic pressure regulating device to reduce the change of air float gap, and control the air float gap with pressure spring and roller; or reasonably configure the air cushion to make it automatically balanced, relative to the high precision detector, the air float precision must be within 0.001-0.002mm.
Secondly, it can improve the attenuation force when the guide moves, the more air cushion holes, the greater the damping force and the greater the rigidity. If the use of powder cure porous material as the air cushion, with a large area of fine holes instead of small holes to narrow the air cushion, then the damping force will be even greater. As long as the precision machinery parts allow processing, you can use gas-liquid two-phase lubrication, due to the existence of oil film on the contact surface of the guide and increase the damping force.
In addition, you can also use the structure of the semi-suspension guide form, the coordinate machine is a combination of suspension rail and mechanical rail form, using the advantages of the motion characteristics of the two rails, not only to improve the resistance to end-motion, but also to maintain a constant gap between the suspension rail, improve the damping force of the guide motion, improve the motion performance of the guide.
Usually, precision mechanical parts processing, machine tools are not suitable for working in dirty and high temperature and humidity, the power supply environment of the power grid also has high requirements, the machine tool supply voltage must be below 10%, three corresponding balance and stability. Harsh power grid must be retrofitted with a regulated power supply, machine tools in addition to maintaining normal cleaning and lubrication, but also must be carefully maintained its various components.