DEVELOPMENT AND SYNTHESIS OF A NEW MECHANISM OF A SEAT MACHINE TRANSPORT

Abstract

To develop a new structure of the movement mechanism of the sewing machine materials, which provides a qualitative movement and perform a determination of its kinematic parameters.
The  object  of  the  study  is  a  typical  and  developed  by  the  authors  mechanism  for moving materials sewing machines. To determine the parameters of the new mechanism, known methods of optimization kinematic synthesis of lever mechanisms are used.  A  new  structure  has  been  obtained  for  the  movement  mechanism  of  sewing  machine materials, mathematical models describing the functions of the position of moving links and characteristic points.  The  combined  optimization  kinematic  synthesis  of  the  mechanism,  computer  simulation  of  the mechanism  in  the  Mathcad  program  are  performed.  The  combined  graphics  of  the  trajectories  of  the
standard and new mechanisms for moving materials of the sewing machine are built. Originality.  A  new  mechanism  of  movement  of  materials  has  been  created  that  ensures  the simultaneous output of all the teeth of the transport rack above the surface of the needle plate, as well as the similar lowering of them after moving the material. The combined optimization method of synthesis based on random  and  directional  search  for  the  determination  of  kinematic  parameters  of  a  new  mechanism  is proposed. Practical  Value.  A  new  scheme  of  the  mechanism  for  moving  materials  has  been  created,  which ensures the simultaneous release of all the teeth of the transporting rail over the surface of the needle plate, as  well as their  similar lowering  after  the  material has  been  moved.  For the  first time,  the  values of the kinematic parameters of this mechanism.