Design And Realization Of Medical Sterilizer Grinding Device

The grinding surface quality(mainly refers to the surface roughness)of the medical sterilizer,both inner-wall and outer-wall is of vital importance to its sterilization process.There exit,however,many problems in the traditional manual way of grinding(which is now still widely applied in this field),for example workers are suffering from over work load,poor and dangerous working conditions,thus leading to the instability of product quality.To address these difficulties,therefore,I proposed that the robot was an excellent substitute to the traditional method.With the mature technology of the robot on force control,we could utilize the device attached to its end to give constant pressure grinding for the inner and outer wall of medical sterilizer.I designed a grinding platform for the medical sterilizer;especially,I contrived a device to grind on its surface.Meanwhile,I made a finite element analysis,both static and dynamic simulation,for its key parts.More details is as follow.(1)Design of grinding devive: The design was based on the technological level of medical sterilizer,and I decided its overall layout and vital parts according to requirements.(2)The grinding device: My attention was attached to make a device that grinds on the surface of medical sterilizer.Considering and comparing the technology at home and abroad,firstly,I decided the layout;then I determined the rated power and torque by calculating its normal and tangential force.Meanwhile,the rated speed of the device was depended on linear speed when the sand strip is grinding the stainless steel.In the end,I added the tension device,the adjustment device and down force control device for the sake of its requirements.(3)Dynamic and static analysis: Several experiments were done and some analyses were reached including the dynamic and static analysis of the device,the static stiffness analysis of key parts,and the comprehensive analysis of the device.According to the results,I concluded that by optimizing the structure within the rated speed,significant improvement of its safety and performance had been noticed.(4)The reason why I contrived the device was that some hypotheses needed to be tested: the pressure control device was able to save the medical sterilizer from deviating the preset caused by the non-rigid and deformable features of the robot,which therefore,played an important role in improving the surface quality after grinding.