An automatic prestressing fixture

Abstract

The invention discloses an automatic prestress clamp which comprises a force bearing upright, a force applying mechanism and a force bearing mechanism, wherein the force applying mechanism and the force bearing mechanism are fixed on the force bearing upright, and are combined to apply prestress to a workpiece; the force bearing mechanism is composed of a group of symmetric mechanical force arms; the two mechanical force arms are fixed at the proper positions of the side surface of the force bearing upright respectively; the front ends of the two mechanical force arms are bent respectively to form force bearing points; the other end of each mechanical force arm extends out to form two fixed points; the main body of the force applying mechanism is a worm gear jack; the body of the work gear jack is fixed on the force bearing upright and positioned in the center of the connection line of the two mechanical force arms; the front end of an ejector rod of the work gear jack serves as a force applying point, and the other end of the ejector rod extends into a cavity of the force bearing upright; a limiting switch of the ejector rod is fixed in the cavity of the force bearing upright.

Description

technical field [0001] The application relates to aircraft manufacturing tooling technology, in particular to an automatic prestressing fixture for shot blasting of aircraft wall panels. Background technique [0002] Prestressed fixtures play an extremely important role in the aircraft manufacturing industry, and are essential process equipment for prestressed shot peening of aircraft panels. The prestressing fixture, as the name suggests, is a fixture for prestressing the aircraft panel. How to load prestress, how to ensure the accuracy of prestress loading, how to improve the efficiency of prestress loading, how to realize the automation of prestress loading, etc., are all technical problems that need to be solved at present. [0003] For example, the applicant's existing invention patent "a flexible combined prestressing fixture" (patent number: ZL200610087318.3) provides a versatile flexible combined prestressing fixture for shot peening of aircraft panels, but it still...

AI Technical Summary

Problems solved by technology

[0003] For example, the applicant's existing invention patent "a flexible combined prestressing fixture" (patent number: ZL200610087318.3) provides a versatile flexible combined prestressing fixture for shot peening of aircraft panels, but it still There are deficiencies, first: the chord clamping mechanism is a set of manual mechanical structures. In order to balance the reaction force dozens of times larger than it, the structure uses large cross-section members and high-strength materials, making the structure particularly bulky , dismantling, moving and reinstalling are particularly time-consuming and laborious, affecting work efficiency

Second: Manually rotate the ejector rod to load the prestress. The size and stroke of the prestress are controlled manually, which is not only labor-intensive, but also difficult to ensure the accuracy of the prestress loading.

These deficiencies will adversely affect the efficiency and quality of prestress loading

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