DETERMINATION OF THE OPTIMAL ARRANGEMENT OF ELEMENTS IN A NOVEL MATERIAL FEEDING DEVICE FOR A SEWING MACHINE

Abstract

The study examines the influence of the parameters of the elements of a material feeding device for a sewing machine developed by the authors on the compressive force acting on the materials between the feeding elements. The upper feeding element is designed as a pair of neodymium magnets, while the lower element is implemented as a conventional toothed rack. Particular attention is paid to the interaction between the magnetic field, the structural components of the machine, and the processed material, as well as to the influence of the geometrical parameters of the working zone.
The aim of the work is to establish the relationship between the compressive force applied to the materials during feeding and the main parameters of the device. These parameters include structural characteristics (the presence or absence of a magnetic core), magnetic properties (type of magnets, their geometric characteristics, and mutual orientation), as well as the properties of machine elements, in particular the ferromagnetic characteristics of the needle plate, and technological parameters such as material thickness and structure.
The scientific novelty of the study lies in identifying the regularities of the influence of the parameters of the upper feeding element on the magnitude of the compressive force between the feeding elements, which is a key factor in ensuring the efficiency and stability of the material feeding process.
The practical significance of the results consists in providing initial data for the design of new material feeding devices for sewing machines with improved performance characteristics and enhanced operational reliability.
The research was carried out using mathematical modeling in the Finite Element Method Magnetics (FEMM) software environment, which made it possible to obtain magnetic field distributions and evaluate the force characteristics of the system under real operating conditions.
As a result, the optimal configuration of the device elements was determined, ensuring effective closure of the magnetic circuit with minimal magnetic flux leakage, thereby achieving the maximum compressive force on the materials and improving the stability of the feeding process.