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How to improve the motion performance of guide rails in the processing of precision mechanical parts, Nanjing Precision Engineering Co., ltd

by:NJPE     2020-02-13
In the processing of precision mechanical parts, in order to improve the motion performance of the air floating guide rail, the following three methods can be adopted. The first is to improve the rigidity of the guide rail in the bearing direction. The structural design of the guide rail adopts a closed guide rail, which can increase the rigidity by 2 times compared with one side; Reduce air flotation gap; And increase the force to close, the gas source needs to stabilize the gas supply, clean the gas supply, and reduce the possible oscillation factors. In the air supply circuit, load compensation mechanism and automatic pressure regulating device should be designed to make the air floating gap change very little, and the pressure spring and roller should control the air floating gap; Or reasonably arrange the air cushion to make it automatically balance and adjust. For high-precision measuring machines, the accuracy of air flotation should be 0. 001-0. Within 002mm. Secondly, the damping force when the guide rail moves can be improved. The more holes in the air cushion, the greater the damping force and the greater the rigidity. If Powder Metallurgy porous material is used as the air cushion and large-area micropores are used instead of small holes to throttle the air cushion, the damping force will be greater. Under the condition that the processing of precision mechanical parts allows, gas- Liquid dual phase lubrication increases damping force due to the presence of oil film on the contact surface of the guide rail. The structural form of the semi-air floating guide rail can also be adopted, the coordinate machine is a combination of the air floating guide rail and the mechanical guide rail, and the advantages of the motion characteristics of the two guide rails are utilized, it not only improves the ability to resist end movement, but also keeps the clearance of the air floating guide rail constant, and increases the damping force of the guide rail movement, thus improving the movement performance of the guide rail. Generally, precision mechanical parts are processed. Machine tools are not suitable for working in dirty and high temperature and humidity environments. The power supply environment of the power grid also has higher requirements. The power supply voltage of machine tools should not be inferior to 10%, the three phases should be balanced and stable. A power grid that is too harsh must be equipped with a regulated power supply. In addition to keeping the machine clean and lubricated, the machine tool must also carefully maintain its various components.
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