ПРИМЕНЕНИЕ ОТДЕЛОЧНО-УПРОЧНЯЮЩЕЙ ОБРАБОТКИ АЛМАЗНЫМ ВЫГЛАЖИВАНИЕМ ДЛЯ ПОВЫШЕНИЯ НЕСУЩЕЙ СПОСОБНОСТИ СОЕДИНЕНИЙ С НАТЯГОМ

Abstract

The test results of stress joints with a regular micro-relief with the purpose of the assessment of their operation properties increase at finish-strengthening are shown. Thus, shaft endurance in insertions increases at relief application on the surface of a bush hole. It is explained with the pressure concentration decrease caused by a fit at the expense of the growth of joint contact flexibility. A similar effect is achieved at the creation of an artificial camber of a surface with the purpose of obtaining a characteristic diagram of a con-tact load distribution. The formation of a regular relief on the shaft surface results in, besides strengthening, the insignificant increase of the fatigue strength in joints. 
 The static strength increase in stressed joints with the regular micro-relief is explained by the contact interaction character of an unevenness at a cross as-semblage and by the increase of an actual contact area at mechanical pressing-in. At that at reassemblies it was observed a lesser decrease of their strength. A sharp increase of bearing capacity is typical for the mating at a balance of micro-relief high-step parame-ters on contact surfaces of a shaft and a bush. The results obtained lead to the idea of the creation of joints like threaded or splined joints at transferring an axial load or a rotational moment. 
 At the relief formation at the expense of some metal extrusion in overflows there is a raising of a sur-face “plateau” which is used for tightness increase of loose connections and also for rejects correction during manufacturing parts. 
 In such a way the application of efficient tech-nologies of regular micro-relief coatings along with strengthening increases considerably fatigue and static strength in joints with tightness.