A Polishing Actuator for Improving the Intermediate Frequency Error in the Processing of High-Load Grinding Heads for Reflectors

Abstract

The invention discloses a polishing executive mechanism for improving the processing intermediate frequency error of a high-load grinding head of a reflector. No less than three disc connecting rods (13) are arranged above the disc-type grinding head (12), each of the disc connecting rods (13) can generate tractive force components of the X-axis and the Y-axis. The invention changes the transmission form of the connecting rod and the grinding disc to improve the movement of the grinding disc during high-load polishing, thereby improving the intermediate frequency error generated in this process, improving the processing efficiency and reducing the cost.

Description

technical field [0001] The invention belongs to the field of optical processing of mirrors, and in particular relates to a polishing actuator for improving the intermediate frequency error in the processing of high-load grinding heads of mirrors. Background technique [0002] The polishing method of small grinding heads has been widely used in the field of mirror processing due to its advantages of easy implementation and low cost. Among them, small grinding heads in the form of grinding discs are widely used in the improvement of surface shape accuracy or in the stage of mirror surface smoothing. , At present, the grinding disc is mostly connected with the transmission mechanism in the form of a single connecting rod. When the applied load increases, the deformation of the connecting rod will cause the grinding disc to move on the surface of the mirror, resulting in unnecessary intermediate frequency errors on the mirror surface and prolonging the processing cycle. , reduci...

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Problems solved by technology

[0006] If you want to improve the processing efficiency, increasing the pressure is the most direct way. Increasing the relative speed will deteriorate the adhesion between the grinding disc and the mirror surface. The increase in other aspects does not significantly improve the processing efficiency.

[0007] figure 1 It is the mirror processing form of the existing grinding head, in which the 3 grinding discs are connected with the 2 connecting rods through the ball head, the 3 grinding discs are fixed by the downward pressure from the 5 power mechanism perpendicular to the mirror surface, and are driven by the 4 "ten" shaped slots , the 3rd grinding disc is at any position on the surface of the 1st reflector, the 2nd connecting rod is perpendicular to the mirror surface, the 3rd grinding head moves along the traveling direction of the 6th grinding disc on the surface of the 1st reflective mirror, and its lateral movement only depends on the lateral component brought about by the deformation of the 2nd connecting rod Realize that when the applied load increases, the friction between the 3 grinding head and the 1 mirror surface will increase accordingly, and when it exceeds a certain characteristic elastic value of the connecting rod material, the 3 grinding disc will generate intermittent movement on the mirror surface , this kind of movement will inevitably bring intermediate frequency errors to the surface shape, which will affect the processing efficiency and precision, and indirectly increase the processing cost

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