Abstract
The article explains a new method of relief marking of heat-shrinkable tubing and sleeves made of polymer materials with “shape memory effect.” Method of instrument evaluation of relief marking stereometry of installation parts for aviation equipment, made of polyvinyl chloride, polyethyleneterephthalate and polystyrene was developed and the results were explained. Parameters of pin-point relief marking and compliance of point forms to the Braille font standard were determined with the use of the non-destructive method based on the color of interference pattern with precision of 0.02 mm.
Highlights
For new samples of complex machinery [1] in aviation industry and aircraft-repair works [2, 3], polymer heatshrinking tubes and sleeves are used with «shape memory» in order to provide additional mechanical protection, sealing action and electrical insulation of contact, complex connections of electrical wires etc.Various types of marking are used in order to control technical conditions of various aviation components and determining the appurtenance of communication tools
Algorithm of the new method of relief marking of heat shrinkable parts made of thermoplastic polymers includes the following operations: Local thermal processing of samples in isometric constraints, application of the sample on a rigid base and heat shrinking process in some hot heattransfer medium
The quality of visual control and preventive measures against shutdowns of electrical networks in aviation equipment very much depends on the quick identification of communication tools
Summary
Various types of marking are used in order to control technical conditions of various aviation components and determining the appurtenance of communication tools. As a rule, multicolored isolation cable sheaths, tags and flags are used for the purpose of identification. In the aircraft electrical systems all wires, harnesses and cables are subject to marking [4]. Appurtenance of wires to various systems and feeders is determined by wire insulation color and by marking, that presents an alphanumeric code, which is put on polymer insulation of the wire or on its identification tag. In the absence of direct access, insufficient visibility or bad lighting conditions of the communication location it is feasible to use relief marking
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