Abstract
The increasing interest in composite materials determines to conduct the research allowing to neutralize the negative effects of the machining process. The paper presents an analysis of the influence of technological parameters and the type of drill bits on the quality of drilled holes in carbon fibrous composites.
Highlights
In recent years, there has been a dynamic development of technologies for the production and shaping of composites
There is an unfavorable phenomenon of the delamination, and sharp, uneven edges appear at the entry and exit of the tool
The authors of papers [5, 7] indicate that the quality of holes can be determined on the basis of delamination coefficient, which is determined from the dependence: WD
Summary
There has been a dynamic development of technologies for the production and shaping of composites. These materials are characterized by good mechanical properties at a relatively low weight, which is very important in modern industry, especially in aviation and automotive, and results in a growing interest in these materials [2, 3]. One of the typical machining operations for these materials is drilling the holes. To improve the accuracy of workmanship, tools with special geometry are used to machine these materials and appropriate ranges of technological parameters are selected [1, 4, 5, 7, 8]. Dmax Dnom where: WD - delamination coefficient, Dmax - maximum diameter of delamination occurrence, Dnom - nominal diameter of the hole (designations according to fig. 4)
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