Method for polishing aspheric optical part

Abstract

The invention discloses a method for polishing an aspheric optical part. The method has the advantages that a polishing head is pressed against a part to be machined, and a cylinder body is directly fixed on a second transmission shaft in the polishing process, so that the rotation angle of the polishing head can be accurately controlled; in the machining process, polishing force is not required to be controlled to form normal polishing force, so that the whole control process is relatively simple; and the surface of the part is uniformly machined, so that stable machining quality of the part is ensured.

Description

technical field [0001] The invention relates to a method for processing parts in the mechanical field, in particular to a method for grinding and polishing aspheric optical parts. Background technique [0002] Aspherical optical parts have attracted extensive attention of researchers because of their good optical properties. In recent years, the research and development of aspheric optical parts polishing technology and equipment generally use ultra-precision multi-axis CNC machine tools as a platform, and process in the form of multi-axis CNC interpolation motion servo to realize the numerical control of the aspheric surface polishing process. Precision, to a certain extent, improves the processing efficiency of lapping and polishing. However, there are the following technical defects in the processing of the above-mentioned equipment: (1) Since the parts are processed only through the position servo control of the CNC machine tool cutting process during the processing, th...

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Problems solved by technology

However, there are the following technical defects in the processing of the above-mentioned equipment: (1) Since the parts are processed only through the position servo control of the CNC machine tool cutting process during the processing, the polishing force acting on the parts cannot be controlled in real time, so that The polishing force of the curved surface polishing process is uncertain and inconsistent, resulting in uncertain and inconsistent finishing quality of the part surface; (2) The cost of equipment is high. Generally, the value of each CNC machine tool is in the millions or even tens of millions, which is extremely high. Great hindrance to the popularization of production of aspheric parts processing

[0003] The application date is June 8, 2010. The Chinese invention patent specification with the patent number ZL201010196710.8 discloses a polishing method for aspheric optical parts. The advantage of this method is that the polishing method can be directly controlled during the processing process. It overcomes the inaccurate force control problem caused by the force / position coupling problem of the compliant mechanical system, which is conducive to obtaining a stable and consistent surface profile and improving the finishing quality of the part surface; The processing of spherical optical parts avoids the high requirements of precision machining on the precision of the mechanical system, reduces the manufacturing cost of the equipment, and is conducive to popularization and application; however, the polishing method must control its polishing force to be normal polishing force, otherwise It cannot be processed; and because the turntable is connected to the first transmission shaft through a compliant control device composed of at least one spring, the rotation angle of the rotating arm cannot be precisely controlled. During processing, the grinding tool can only be pressed against the processing part. resulting in unstable processing quality

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