Дослідження міцності роз'ємного різьбового з'єднання з великим кроком в деталях з армованих композиційних матеріалів

Abstract

With the purpose of research of durability, offered sectional connection for details from the reinforced composition materials (RCМ), there were undertaken studies with the change of basic parameters that most influence on the capacity of connection. For the offered connection, round screw-thread with a stride, such parameters as step of screw-thread of р and depth of profile of screw-thread of t changed. These basic parameters varied within the following limits step of screw-thread p in the range from 1 to 4 mm, and depth of profile of screw-thread t is from 0.5 to 1 mm. Mechanical processing of this connection was carried out on the newly developed technology, the detailed processing technology described in [1]. For processing, a CNC milling machine was used. Experimental strength tests were carried out using special equipment, a universal rupture machine P20. The threaded connection was made in a plate of 190x107x16 mm, the material from which the specified plate was made of fiberglass (0.5 to 0.5 mm gratings) 0.2 mm thick and EPOXY-520 epoxy resin. Got values of force, allowed to set that sectional connection on descriptions of durability, at all set parameters approached, on the indexes of durability, to connection, with analogical parameters executed in a metal. Due to implementation of complete factor experiment on the classic chart of his implementation, basic parameters were set at that indexes of durability will be the best, for our case a step of screw-thread will be р = 4 mm, and value of depth of profile of screw-thread of t = 0.9 mm.