| Steel-rubber rolling structure is widely used in industrial fields,such as printing machinery,film manufacturing machinery and so on.Steel-rubber rolling structure is a very important part in mechanical equipment,which is mainly responsible for power transmission and medium transmission.In steel-rubber rolling structure,rubber material has high elasticity,low impedance,viscoelasticity and other mechanical properties.In the process of using rubber materials,the change of temperature will directly affect the structure,performance and service life of rubber.For example,in the process of extrusion and rotation of the rubber roller of the press,the friction heat generated by the rotation between the rollers and the lagging heat generated by the rubber material will cause the change of the material characteristics of the rubber roller,thus affecting the contact characteristics between the rollers and the printing quality.It is of great significance to analyze the influence of temperature on rubber material and steel-rubber rolling structure,so as to improve the structure performance and product quality.In order to study the influence of temperature on the dynamic mechanical properties of steel-rubber rolling structure,this paper takes a pair of steel roll and rubber roll which are extruded and rotated as the research objects,and uses the method of theory combining experiment and simulation to establish two kinds of rubber constitutive models with the change of temperature,and determines the constitutive model suitable for this paper by comparison analysis;analyzes the change of the steel rubber roll structure under different temperatures.The change of dynamic mechanical properties,the temperature and dynamic mechanical properties of rubber roller under different working conditions were compared and analyzed by finite element simulation and experiment,and the main factors influencing the dynamic mechanical properties of rubber roller were obtained.First of all,using the method of DMA experiment combining theory and ANSYS finite element,the rubber hyperelastic and rubber hyperelastic viscoelastic composite constitutive model with the change of temperature are established.The model is added to the steel-rubber rolling structure for transient dynamic simulation.Through the comparative analysis of the simulation results,it is concluded that the hyperelastic and viscoelastic of rubber cannot be ignored.Secondly,the dynamic mechanical properties of the steel-rubber rolling structure are tested by using the experimental platform,and the deformation and contact width in the process of temperature change are collected;the dynamic simulation of the steelrubber rolling structure under different temperatures is carried out,and the simulation and experimental results are compared to determine the accuracy and feasibility of the simulation,and then some properties that cannot be obtained in the experiment are extracted The influence of temperature on the dynamic mechanical properties of steelrubber rolling structure is obtained through further analysis of the dynamic mechanical properties of the rolling structure.At last,the dynamic mechanical properties of steel rubber roll structure under different working conditions are analyzed by experiment and simulation,and the influence regulations of different rotating speed and combining force on the temperature rise and dynamic mechanical properties of steel-rubber rolling structure are obtained.The orthogonal experiment is introduced to summarize the existing experiment and simulation results in order to get the primary and secondary relations among output temperature,rotation speed of two rollers and binding force between rollers,which play a guiding role in production practice. |
