The requirements of Beijing Donghua Jingji High-tech Co., Ltd. were successfully developed as the driving unit, but due to its inherent characteristics, the DHM-500U ultra-precision aspherical grinding machine will be produced. The traditional method of additive swing. The solution is to use the unloading structure, see.
It takes about 2~3 months to work on an aspherical lens. Grinding an aspherical lens with this grinding machine is only about 7. The spindle, grinding head, slide and turntable of the grinding machine are all made of hydrostatic structure. High precision and rigidity. The X, Z, and B axes all use ultra-precision gratings for full-closed feedback.
Ultra-precision grinding of aspherical parts can be achieved by X, Z, B three-axis linkage.
The actual structure of the machine tool is shown in the schematic diagram of the machining, and the grinding head will be mounted on the turntable. In the actual processing, the point method is generally adopted, that is, according to the function of the aspheric surface, the coordinate values ​​of a series of points are calculated, and input into the system, and each motion axis will realize the processing of the aspherical parts according to the coordinate of each point. The advantage of this is that the calculation time of the system can be saved, which is beneficial to improve the processing precision.
(5) Line processing accuracy detection and compensation In the processing, due to some factors affecting the machining accuracy, the grinding machine is equipped with an on-line detection device, see the measurement error to correct the program, in order to obtain the ideal machining accuracy.
(6) Vibration of the machine tool vibration environment will have a great impact on the machining quality of the machine tool. In precision machining, especially ultra-precision machining, the machine tool must be well insulated. Practice has proved that the use of gas damping spring can play a very good damping effect. The gas damping spring has low vibration isolation and is easy to install. And the vibration measured on the machine tool with the gas damper spring and the gas damper spring.
(2) The grinding machine removes the grinding head and attaches the tool holder, which is an ultra-precision CNC lathe. See 0. () The main technical index of the grinding machine, the spindle rotation accuracy: 01Mm; the grinding wheel shaft rotation accuracy: 0.1Mm; Rotary table rotation accuracy: 0.1am; guide line straightness: 0.5ium/280mm; X, Z axis positioning accuracy: ±0.5; turntable positioning accuracy: ±3"; moving resolution
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