Precision turning parts
Contemporary precision ultra-precision machining technology is mainly used in aviation, precision instruments, computer industry and optical industry.
For example, a computer disk has a flatness requirement of 0.1 to 0.5 μm and a surface roughness of RaO.O03 of 0.05 μm.
The X-ray astronomical telescope used for celestial bodies has a maximum diameter of more than 1 meter and a length of 0.6 meters. The dimensional accuracy requirement is 1 micron and the surface roughness is Ra 0.05 micron.
For optical components used for UV and X-rays, the surface roughness is usually Ra 0.001 micron. Commonly used inertial instrument air bearing gyro inside and outside support ball and roundness of 0.2 to 0.6 microns, size accuracy of 0.6 microns, surface roughness Ra0.012 a 0.05 microns.
The laser gyro plane mirror has a flatness of only 0.03 μm, a surface roughness Ra of less than 0.012 μm, a mirror for laser fusion, a multi-faceted prism for detecting the index accuracy of a rotary table, a cartridge for a copier, and a video recorder. Magnetic heads, optical disks, and silicon chips used in large-scale integrated circuits for computers have extremely high requirements for surface roughness and dimensional accuracy.
With the rapid development of industries such as automotive, energy, medical equipment, information, optoelectronics, and communications, the demand for ultra-precision processing machines has increased dramatically.
Applications in industry include aspheric optical lenses, Fresnel lenses, ultra-precision dies, disk drive heads, disk substrate processing, and semiconductor wafer cutting.
During this period, related technologies of ultra-precision machining equipment, such as controllers, laser interferometers, air bearing precision spindles, air bearing rails, oil bearing rails, and friction-driven feed shafts, have also gradually matured, and ultra-precision machining equipment has become Industrial production machinery and equipment, even small companies, have also introduced mass production equipment.
In addition, the precision of the equipment is also gradually approaching the nano level, the machining stroke becomes larger, and the machining applications are gradually widened. In addition to diamond lathes and ultra-precision grinding, ultra-precision five-axis milling and fly-cutting technologies have also been developed and can be Non-axisymmetric aspheric optics are machined.
