| In order to improve the reliability of the J599 circular connector,the structure parameters of the contact pair of the J599 circular connector are optimized by means of the theoretical study and the finite element simulation.The theoretical and simulation results are verified and the optimized design parameters of the contact pairs of the J599circular connector are finally calculated by the mating/un-mating force experiment.In this paper,the background of connector optimization design and the significance of optimal design research are described from the point of view of engineering requirements.Through consulting a large number of literature at home and abroad,focusing on the reliability research of circular connectors and the analysis of mating force analysis of pinhole contact pairs,the finite element technology used in the process simulation of contact and un-mating force is studied and analyzed.The research content,implementation scheme and steps of this paper are determined.Then the mating force/un-mating force model of pinhole contact pair is established by using material mechanics,friction mechanics,Hertz contact theory and other related theoretical knowledge,and The relationship of the mating/un-mating force and are obtained with relative displacement in mating process.At the same time,the contact area of contact pairs under typical geometric parameters are calculated.The relationship curve between mating force and un-mating force with displacement in the process of mating and un-mating is drawn by iterative calculation of MATLAB software.It is concluded that under the design of typical parameters,the maximum mating force is 2.50N,the maximum un-mating force is 2.41N,and the single point contact area of pinhole contact pair is 1.59mm~2.Next,the geometric modeling of pinhole contact pair is carried out by PROE.The geometric model established by PROE is introduced into the ANSYS simulation software,and the finite element simulation of the process of mating and Un-mating is carried out.The results of theoretical calculation,finite element simulation and experimental measurement are compared.The force change of pin mating and un-mating is consistent with the theoretical analysis,in which the mating force will have a peak value of 2.37N,and then the mating force will be maintained at 2.25N,and the un-mating force will be 2.25N.The experimental measurement of the mating/un-mating force of a single pinhole contact pair is carried out by using a mating/un-mating force testing machine.The variation trend and theoretical calculation of the mating/un-mating force curve measured by the experimental machine and the ANSYS simulation,The results are generally consistent.Finally,the influence of several structural parameters on contact is analyzed by orthogonal experiment,and the factors that have great influence on contact are obtained.The influence of structural parameters on mating force/un-mating force and contact area is inferred,and the structural parameters of contact pair are optimized by quadratic programming method.In the paper,The influence of geometric parameters of J599 circular connecting machine on mating/un-mating force and contact area is analyzed by the way of theoretical calculation and simulation experiment.The optimized structural parameters of contact pairs were obtained as follows:female Pin length is 4.8 mm,the thickness is0.29 mm,0.8 mm in diameter,female Pin opening size of 0.75 mm,the chamfering of the reeds is 0.3 mm,slot width is 0.32 mm,male pin needle head is 0.42 mm long,male pin diameter is 0.76 mm is optimal.At this time,the maximum mating force is 1.54N,the maximum un-mating force is 1.51N,and the single point contact area of contact pairs is 1.14mm~2.Finally,the reliability of the optimized contact to the mating force/un-mating force is confirmed by test. |
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