The paper introduces the application of axial varable piston pumps in plastic machines with low energy consumption and of internal gear pumps in plastic machines with low noise level,and whole electromotion plastic machines without hydraulic pumps.
On the basis of considering the tooth profile theoretic clearance of inner meshing gear pairs and elastic deformation of gears, the theoretic analytical model was established for number of actual contacting tooth pairs of elastic meshing of three-ring transmission and load distribution among each tooth. A method of elastic meshing effect coefficient is being counted in the calculation of gear strength, and the influence of manufacturing errors has been considered according to the checking method of static strength.
A new spinforming technology for thin-walled proculiform inside engaged gear was presented based on the principle of plastic deformation of metal and characteristic of spinning process. A 3D elastic-plastic finite element model for gear spinning was established and numerical simulation was applied to analyze the strain distribution and metal flow law of different directions in the deformation zone during the gear spinforming. The influence regularities of main technological parameters on the gear spinforming were qualitatively analyzed.