Super polishing experiments were carried out to investigate the effects of polishing parameters on surface quality of stainless steel lens moulding inserts, and to optimize polishing conditions. Experimental results indicated that optical quality surface of stainless steel lens moulding inserts can be achieved through a two-step polishing process: fast polishing with a soft wood head and coarse diamond paste, and fine polishing with a nylon-covered steel ball head and fine diamond paste. A diameter of 20 mm stainless steel lens moulding insert with a surface roughness Ra of 7.6 nm has been successfully achieved using the two-step super polishing process.
It has been one of the difficulties that high-precision small hole on stainless steel is machined. The supersonic vibration boring acoustic system is installed in the lathe. The supersonic wave energy applies to tool to create pulse power on the cutting process. The separation vibration cutting is achieved by the pulse force. The comparative tests on boring surface quality are carried. The quality of surface machined by this method is compared to that by grinding. This cutting is the green cutting. The boring process system is stability. The cutting force is greatly reduced. The cutting temperature is at room temperature. The tool life is greatly increased. Surface quality and shape precision is greatly improved. The regulations of the ultrasonic vibration boring dry cutting of stainless steel are also summarized. The test results show that the ultrasonic vibration boring by double cutter is of very superior cutting mechanism and is a high-precision thin - long deep - hole machining of stainless steel materials, efficient cutting methods.
This article presents some possibilities of laser micro-machining. Results of the laser micro-machining surface quality of product and his utility in specific application depend on the laser parameters and the polymer material type. From the obtained scientific knowledge it follows, that the character of surface machined by laser depends on thermal conductivity of polymer. The action of laser beam is best shown on specimens from PMMA, therefore tests were carried out with this material. Optimal parameters of CO2 laser for used material are presented in given study. Visual evaluation of action laser ray on surface of PMMA was made also.
Effects of combined process of reactive ion etching and dynamic chemical etching on UV laser damage resistance and surface quality of fused silica optics