Aluminum sheet substrate for coating shearing strength test and test sample thereof

Abstract

The invention belongs to the technical field of coating shearing strength tests, and particularly relates to an aluminum sheet substrate for a coating shearing strength test and a test sample thereof. The aluminum sheet substrate comprises an inlaying groove which is formed in one side of the aluminum sheet substrate and used for inlaying a glass plate or porcelain plate and one or more movable clamping buckles used for clamping the glass plate or porcelain plate after the glass plate or porcelain plate is placed in the inlaying groove; each movable clamping buckle comprises a movable clamping sheet which is fixed on one side of the inlaying groove and can rotate in a pivot mode and fixing buttons fixed on the other side of the inlaying groove. The test sample is composed of two aluminum sheet substrates of which parts are overlapped, the aluminum sheet substrates are arranged in the mode that the inlaying grooves are opposite, the glass plates or porcelain plates are inlaid into the inlaying grooves of the aluminum sheet substrates, and a to-be-tested coating used for bonding parts of the glass plates or porcelain plates together is applied between the glass plates or porcelain plates which are inlaid into the inlaying grooves of the aluminum sheet substrates. According to the aluminum sheet substrate for the coating shearing strength test and the test sample thereof, the test torque is decreased, and the substrate is made to be not prone to deformation, convenient to disassemble and capable of being repeatedly used and not need to be bonded.

Description

technical field [0001] The invention belongs to the technical field of paint shear strength test, and in particular relates to an aluminum sheet substrate used for paint shear strength test and a test sample thereof. Background technique [0002] The shear strength test is applicable to the shear specimens prepared under specified conditions and bonded to two parallel glass plates (or ceramic plates). The paint and the glass plate (or porcelain plate) are bonded by vulcanization. The sample is an overlapping structure in which the paint is sandwiched between two parallel glass plates (or ceramic plates). Apply tensile shear force on the bonding surface of the sample, and measure the maximum tensile shear force of the sample. The maximum tensile shear force on the unit bonding surface of the sample is the tensile shear strength of the bond between the coating and the glass plate (or porcelain plate). [0003] In the existing shear strength specimen preparation, such as fi...

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Problems solved by technology

[0004] The defect of the above-mentioned prior art is that when the clamp clamps the end of the aluminum plate for stretching, the two forces do not act on a straight line, and there is a torque. The original method is used to make the sheet, and the torque is large (the line of action of the force is centered on the center of the aluminum plate. Line calculation, when the thickness of the glass plate is 5mm, about 12mm), in the test, it is easy to cause the aluminum plate to bend, warp, and the bonding surface between the aluminum plate and the glass plate is damaged, making the final result invalid (the distance between the two glass plates is Effective), or the test data is inaccurate, the data fluctuates greatly, etc.

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