Modeling of technological parameters of filament joints of clothing parts for professional sports fencing

Julia Kharchenko,Larysa Bilotska

doi:10.15587/2706-5448.2020.202199

Abstract

The object of the presented research is the technological process of manufacturing clothes for professional sports fencing. The subject of research is the quality of the knitted joints, which are regulated by technical requirements and require special attention when designing an assortment of clothes for fencing athletes.The research methodology is based on the analysis of scientific literature, measurement of mechanical properties and modeling of technological parameters of knitted joints of fencing clothes. In order to determine the effect of the number of stitches on the breaking strength and the longitudinal deformation of the knitted joints of fencing clothes, mathematical modeling of the manufacturing process using the experimental design method is used. The choice of the experimental design is associated with determining the number of experimental points and their placement in the factor space, which will make it possible to obtain the necessary information for making a decision with a relatively small number of experiments. During the study, methods were used to determine the breaking strength and extended deformation of the joints. A feature of the study is the determination of rational technological parameters of the knitted joints while maintaining the necessary tensile strength and a certain level of longitudinal deformation. The rational parameters of the number of stitches in the seam-sewn and finishing stitching lines for the studied materials of fencing clothes are those for which the tensile strength of the seam is ≥970 N and the longitudinal deformation does not exceed ± 2.0%, namely: t– (5.0÷6.5) stitches/10 mm, h–(3.0÷3.5) stitches/10 mm.The obtained results prove the possibility of using mathematical modeling methods to predict the quality of knitted joints of clothing parts for professional sports fencing. This approach is of practical importance and can be applied both at the stage of designing the technology of manufacturing clothes for professional sports fencing when choosing processing modes for new materials, and at the stage of manufacturing and quality control of performed operations.

Highlights

Competitive activity and the motor structure of the technical and tactical actions of fencing athletes require certain physical, psychological and intellectual abilities and skills [1, 2]
After choosing the processing modes and adjusting the corresponding equipment, strict quality control of operations is necessary for the maximum deviations from the nominal dimensions of the finished products
In the course of the study, rational parameters for the number of stitches in the suture-sewing and finishing stitching lines for the studied materials of fencing clothes are proposed for which the tensile strength of the seam is ≥970 N and the longitudinal deformation does not exceed ±2.0 %, namely: t–(5.0÷6.5) stitches/10 mm, h–(3.0÷3.5) stitches/10 mm

Summary

Introduction

Competitive activity and the motor structure of the technical and tactical actions of fencing athletes require certain physical, psychological and intellectual abilities and skills [1, 2]. The issue of the quality of the thread connected during the design of the range of fencing clothes becomes especially relevant when choosing structural and technological solutions, depending on the properties of the materials used and the characteristics of the equipment. When stitching parts made of synthetic materials, which include knitted fabrics for the manufacture of fencing clothes, deformation of the material along the seam line is observed, especially when connecting parts with curved contours. The aim of research is to develop recommendations on the selection of rational technological parameters of the filament joints of fencing clothing to be connected while maintaining the achieved tensile strength and a certain level of longitudinal deformation, which does not exceed the permissible deviations of the main measurements according to the time sheet

Methods of research

Research results and discussion

Conclusions