KINETOSTATIC STUDIES OF HINGED SPATIAL MECHANISMS OF GALLTING MACHINES (PART 1: RESEARCH OF THE MECHANSM WITH AN ADDITIONAL MOBILE ROCKER LINK)

Abstract

Kinetostatic  study  of  a  statically  determined  hinged  spatial  mechanism  without  redundant (passive) connection with an additional movable link – a rocker arm of a machine for processing parts, in
which the working container performs complex spatial movement.  
Methodology.  The  essence  of  the  kinetostatic  research  was  to  determine  the  radial  and  axial components of the reactions in all rotational kinematic pairs of the hinged statically defined spatial mechanism of  the  machine  for  processing  parts,  when  it  is  idling.  The  kinetostatic  study  was  implemented  using  the SolidWorks 2016 computer-aided design system with preliminary 3D modeling of this machine design with an additional moving link – a rocker.  Results. In the course of the kinetostatic study, 3D modeling of a machine with an additional movable link – a rocker arm in the SolidWorks 2016 computer-aided design system was carried out, the maximum values of the radial and axial components of reactions in all rotational kinematic pairs of the machine for processing parts were determined, the effect of changing the center distance of the intermediate connecting rod (working capacity ) on the increase in the maximum values of the reactions in all rotational kinematic pairs.  Scientific novelty. The relationship between the center distance of the intermediate connecting rod (working capacity) and the change in the maximum values of the reactions in all rotational kinematic pairs of the machine for processing parts is determined. As a result, it becomes possible to determine the maximum permissible center distance of the intermediate connecting rod to ensure the durable operation of the machine.  Practical significance. It is determined that the nature of the change in the maximum values of the radial  and  axial  components  of the  reactions  in  each  rotational  kinematic  pair  of  the  spatial  mechanism depends  on  the  value  of  the  coefficient  characterizing  the  ratio  of  the  center-to-center  length  of  the intermediate  connecting  rod  (working  capacity)  to  the  center-to-center  length  of  the  driving  or  driven connecting rods of the machine. The range of variation of this coefficient has been determined, within which it is rational to design this machine design. The results obtained can be used in the corresponding design bureaus of machine-building enterprises at the stage of designing tumbling equipment with a complex spatial movement of working containers.