| The outbreak in early 2020 caused the shortage of medical gloves,which put forward higher requirements for improving the efficiency and the subsequent collection and sorting process while ensuring the accuracy of leakage detection of medical gloves.However,the traditional glove leakage detection methods and the subsequent collection and sorting process of gloves are too inefficient,and the backward production capacity can’t meet the current demand.Therefore,a set of automatic glove collection device is urgently needed in the market to complete this task.The automatic glove collecting device includes seven systems: glove air leakage detection system,glove left-hand and right-hand identification system,glove and fixture separation system,glove transportation system,glove left-hand and right-hand separation system,glove counting and storage system after left-hand and right-hand separation,and glove automatic packing system after counting and storage.A new automatic glove collecting device is designed and a prototype is manufactured.In order to improve the accuracy of glove leakage detection,finite element statics analysis was carried out on the detection bracket with fixed photoelectric sensor by ANSYS,which ensured that the bearing capacity and rigidity of the detection bracket could meet the requirements.In order to avoid the influence of resonance on the detection accuracy,modal analysis and harmonic response analysis were carried out on the detection bracket to obtain the natural frequency,mode shape and the relationship between frequency and amplitude.By comparing the results of modal analysis and harmonic response analysis,it was found that the third-order natural frequency had a great influence on the detection bracket,which was easy to cause resonance.When working,it was necessary to avoid the external phenomenon near this frequency.In order to ensure the coaxiality between the motor shaft and the gear shaft,statics analysis is carried out on the bracket on which the servo motor is installed to ensure that its bearing capacity can meet the requirements.In order to ensure the working stability of the glove and clamp separation system;The gear shaft is statically analyzed to ensure its strength and stiffness requirements,and then the first six natural frequencies of the gear shaft are obtained through modal analysis.It is found that the normal working frequency is far away from the first natural frequency,so it is judged that the gear shaft will not resonate.In order to ensure that the gear of the glove-fixture separation system will not have root fracture and tooth surface peeling during the meshing process,the finite element analysis of the contact process of the gear shows that the stress at the root of the gear and the stress at the sub-surface of the contact surface are all less than the allowable stress of No.45 steel,so it can be judged that the gear will not have root fracture and surface peeling under normal working conditions.At the same time,the contact process of the roller gripping gloves is analyzed,and the stress and deformation of the blanket lining the roller surface are obtained,which provides data support for judging the reliability of the roller gripping gloves.The kinematics simulation analysis of the glove-clamp separation system is carried out by ADAMS,and the angular velocity and acceleration of the roller shaft in the process of clamping gloves are obtained,which provides a basis for judging the motion state of the roller.At the same time,the forces in X,Y and Z directions between the roller shaft and the bearing are within the normal range,which will not cause the failure of the bearing and ensure the normal operation of the roller in the process of clamping gloves.At the same time,the kinematic analysis of the motion process of the slider-crank is carried out,and the parameters such as displacement,speed and acceleration of the slider are obtained,which provides a basis for studying the motion law of the slider. |
