Research On Manufacturing Process And Performance Of Precision Conductive Slip Ring

Slip rings are used to achieve the electrical signal’s stable and reliable transmission between two relative rotation components, where precision slip ring is small and the alignment intensive parts, it can achieve a high density signal transmission under the premise of ensuring the stability of the electrical signal transmission. So the precision slip ring is widely used in aviation, aerospace, military, medical, marine, and industrial automation systems. With the continuous development of the aerospace, the demand for the ring’s volume, the stability and the intensive of the electrical transmission has been further improved, the existing manufacturing process can not meet these requirements, so it becomes an urgent issue that study the precision slip ring manufacturing methods.Aiming at the disadvantages of the existing slip ring manufacturing method (vacuum infusion method and stacking formula tackiness method), the paper proposed a new method for producing ultra-precision slip ring. By the method of ultra-precision turning, firstly turning polysulfone resin material to forming the insulating matrix of precision conductive slip ring, secondly plating above the precision conductive slip ring, lastly finishing the arrangement of the leads.Polysulfone resin material is easy to arise deforming when it is cut by lathe, the characteristic made the precision turning become a big challenge. Thesis has combined finite element analysis software and test to analyze the deformation of the micro-grooves in the processing of ultra-precision turning. The analysis includes the regular pattern of the deformation’s change in pace with the change of spindle speed, the feed rate, the rake angle and the depth of cut. Micro-groove’s deformation amount increases as the spindle speed increases, when the spindle speed is higher than 870r/min, the deformation of the micro-grooves have been unable to meet the accuracy requirements; the deformation of the micro-grooves increases with the feed rate increases; the micro-groove’s deformation amount increases with the rake angle becomes smaller, when it becomes 18°, the amount of deformation becomes the least; when the cutting depth is less than 0.2mm, the micro-groove ’s deformation almost unchanged, when it is higher than 0.2mm, the deformation of the micro-grooves increases when the cutting depth becomes larger. Finally the paper got the optimum processing parameters:spindle speed 560r/min, rake angle 18°, cutting depth 0.2mm feed rate 0.4mm/min. The paper made a friction and wear test contrary to the manufacturing precision slip ring. When the rotational speed unchanged, the friction coefficient and the wear rate of the slip rings increases with the load increases, the contact resistance decreases with the load increases; when the load unchanged, the friction coefficient and the wear rate of the slip ring gradually reduces with the rotational speed increases, the load contact resistance is basically unaffected. When the load is low, the mainly wear and tear is adhesive wear, when the load is high, the mainly wear is abrasive wear and adhesive wear.