Rivet mandrel ejection force detection tool

Abstract

The invention discloses a rivet mandrel ejection force detection tool. The tool comprises a riveting piece, an ejector rod, an upper base and a lower base, wherein the upper base and the lower base are opposite to each other up and down. The riveting piece is arranged in a first groove. The riveting piece comprises an upper riveting piece and a lower riveting piece. The upper riveting piece and the lower riveting piece are riveted through a tested rivet. The different riveting pieces can rivet different types of tested rivets, the upper base is pressed downwards to make the ejector rod eject out of a head of a mandrel of the tested rivet, applied pressure, which is an ejection force of the rivet, is detected by pressure detection equipment, and therefore, the tool does not need to be replaced, and the ejection forces of different rivets can be tested by replacing the riveting pieces.

Description

technical field [0001] The invention relates to the technical field of rivet ejection force detection, in particular to a tool for detecting the ejection force of a rivet mandrel. Background technique [0002] Rivets are widely used in the field of aviation standard parts, and are mainly used for single-sided connection of aircraft skins and other composite materials. Most of the rivets used in the aviation field are blind rivets. The structure of blind rivets is much more complicated than that of ordinary fasteners. It is usually assembled by rivet body, mandrel and other components. Therefore, the product must test a number of mechanical indicators, among which the ejection force of the core rod is one of them. Ejection force refers to the force exerted on the head of the riveted mandrel to slowly eject the head of the mandrel from the inside of the rivet body by applying axial pressure. [0003] At present, there are two problems in the ejection force test. First, the r...

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Problems solved by technology

[0003] At present, there are two problems in the ejection force test. First, the relevant standards do not have uniform regulations on the fixtures for this test item, which leads to large differences in the results of different testers on different equipment and different fixtures. The second point is that there are many types of blind rivets and various structures, which do not solve the problem of quick interchangeability of tooling.

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