Flexible film circular symmetry circumferential pre-tightening device

Abstract

The invention provides a flexible film circular symmetry circumferential pre-tightening device. The flexible film circular symmetry circumferential pre-tightening device comprises an annular base, a pressing ring (including two pairs of rubber rings), fastening bolts and a flexible film. The annular base serves as a body structural part to support the flexible film and is connected with the pressing ring through the fastening bolts, the pressing ring exerts friction force on the film through the embedded inner side rubber rings to achieve circumferential pre-tightening, and positive pressure is exerted through the embedded bottom side rubber rings to firmly lock the film. The fastening bolts are evenly distributed on the annular base and the pressing ring, the film is clamped in a gap between the pressing ring and the annular base, and the edge of the film is located between the rubber rings on the bottom side of the pressing ring and the fastening bolts and does not make contact with the fastening bolts. Firstly, the flexible film is cut into a circular film with the diameter slightly smaller than the enveloping size of the fastening bolts, the circular film is flatly laid on the upper surface of the annular base, then the pressing ring is concentrically and parallelly pressed down to enable the film to be circumferentially pre-tightened, and finally the fastening bolts are all uniformly tightened to lock the flexible film.

Description

technical field [0001] The invention belongs to the field of optical processing of flexible materials, and in particular relates to a circularly symmetrical circumferential pretensioning device for flexible films. Background technique [0002] In the field of optical processing, lenses are generally made of rigid materials, such as quartz and glass. The optical processing technology requires the material to have high mechanical strength and surface shape stability in order to ensure sufficient processing accuracy. Flexible materials such as polymer optical films have attracted great attention in recent years due to their great lightweight and cost advantages, but their poor mechanical strength and surface shape stability prevent them from being directly used as optical lenses. Contents of the invention [0003] In order to perform optical processing on flexible materials, the invention provides a circularly symmetrical circumferential pretensioning device for flexible fil...

AI Technical Summary

Problems solved by technology

Flexible materials such as polymer optical films have attracted great attention in recent years due to their great lightweight and cost advantages, but their poor mechanical strength and surface shape stability prevent them from being directly used as optical lenses.

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