Deterministic magnetic jet-flow finishing method and apparatus

Abstract

A deterministic magnetic jet finishing method, which uses a magnetic field outside the nozzle that can spray magnetorheological fluid to form a jet, and controls the magnetorheological fluid by controlling the spatial movement position of the workpiece and the direction and size of the magnetic field around the nozzle. The rheological characteristics of the magnetorheological fluid are used to control the viscosity and jet angle of the magnetorheological fluid to form an anisotropic liquid medium, which is characterized in that the nozzle is placed in five coordinates composed of y-axis, v-axis, x-axis, z-axis and u-axis On the CNC platform, the v-axis that can place the workpiece is set on the y-axis. Above the v-axis is a nozzle and the u-axis connected to it. The z-axis that can move up and down is connected to the u-axis and connected to the x-axis. Magneto-rheological The liquid is composed of 30-40% carbonyl iron powder, 50-60% water, 4-8% abrasive and 1-5% stabilizer by volume. The invention combines jet technology and magnetorheological fluid viscosity controllable characteristics, by controlling the jet angle of magnetorheological fluid and the viscosity of external magnetorheological fluid, it can ensure that the polishing mold has a stable removal function, and realizes the definite amount of polishing of optical parts processing.

Description

Technical field: [0001] The invention relates to the technical field of ultra-precision molding processing of optical parts, in particular to a method for finishing the surface of optical parts by magneto-rheological fluid jets. Background technique: [0002] Since the 1980s, computer technology has been integrated into the processing of optical parts, and deterministic processing has become the key to distinguish modern advanced optical manufacturing technology from non-quantifiable and non-repeatable classic optical processing, and thus the development of computer-controlled optical surface Forming technology (referred to as CCOS technology) has greatly promoted the development of optical parts manufacturing technology, especially the grinding and polishing of large optical parts. CCOS technology has shown incomparable advantages in processing efficiency compared with traditional methods, and has a tendency to replace manual processing. With the development of processing t...

AI Technical Summary

Problems solved by technology

[0003] There are still many disadvantages in computer-controlled finishing using traditional asphalt polishing dies: first, different materials and shapes of aspheric parts need to use asphalt polishing dies with different hardness, so that the polishing dies can better fit the surface of the workpiece and obtain Good and stable unit removal function, but the different fabrication of polishing molds reduces the versatility of computer control technology

However, due to the limitation of the control principle and implementation method of magnetorheological fluid, satisfactory results have not been obtained, and the CCOS processing technology of large optical parts has been stagnant.

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