Preparation method of fungiform samples for testing tensile strength of thermally-bonded metal rubber-coated parts

Abstract

The invention discloses a preparation method of fungiform samples for testing tensile strength of thermally-bonded metal rubber-coated parts. The method comprises the following steps: treating samples, namely blasting sand to A surface parts or chemically oxidizing the A surface parts and finally storing the A surface parts; coating the A surface parts with adhesive after carrying out surface treatment according to the above requirement; coating the A surface parts with adhesive again according to the same requirement and drying; carrying out vulcanization by thermally smelting unvulcanized rubber compound to be plastic state in a thermal smelting machine before using, pressing the rubber compound into rubber sheets, cutting the rubber sheets into specification of the A surface size, removing dust on the rubber sheets by using gasoline, placing the rubber sheets for 10-15 minutes at the normal temperature and wrapping the rubber sheets with glass paper for later use. The rubber sheets are used as furnace following test sheets of the rubber-coated parts for checking the quality of the thermally-bonded metal rubber-coated parts; the adhesion force among the metal parts, the adhesives and the rubber can be directly reflected; the influence of incapability of directly checking uncertain process factors such as temperature and pressure and the like on the quality of the metal rubber-coated parts can be avoided; the quality of the rubber-coated parts can be directly checked; the qualification rate of the delivered rubber-coated parts can be increased.

Description

Technical field [0001] The invention relates to a method for preparing a fungus-shaped sample for testing the tensile strength of a thermally bonded metal encapsulated part. Background technique [0002] Thermally bonded metal encapsulated parts refer to parts that are vulcanized and molded at a certain temperature and pressure with the rubber compound after coating the adhesive on the metal parts. Adding rubber to metal parts such as oil leakage, water leakage, and air leakage can improve the sealing performance of metal parts, and is widely used in the aviation and automotive fields. At present, the main test items for assessing metal encapsulated parts are peel strength (90° and 180°) and shear strength, but they cannot directly reflect the tensile strength of thermally bonded metal encapsulated parts. The tensile strength affects the thermal bonding The service life of the metal cladding parts. [0003] Therefore, it is necessary to design a fungus-shaped sample for testing t...

AI Technical Summary

Problems solved by technology

At present, the main test items for evaluating metal-clad parts are peel strength (90° and 180°), and shear strength, but they cannot directly reflect the tensile strength of thermally bonded metal-clad parts. The service life of junction metal rubber parts

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