Study of Strength under Uniform Loading Conditions of Combined Threaded Joints in Structures of Thermoplastic Parts with Metal Reinforcement

This article is presented as a study of combined threaded connections used in mechanical engineering and oil field volumetric hydraulic drive devices and other areas. The issue of creating combined reinforcement by pressing and casting a part from a plastic mass onto a metal reinforcement comes to the fore. It has been established that the profile and pitch of the thread should be selected from the same calculation of the strength of the thread made of metal and thermoplastic, the determining role in the calculation is played by the length of the thread, which is one of the main parameters. The minimum wall thickness is selected using thread profiles. The study showed that the shear strength of thermoplastic materials differs significantly from that of metallic materials. The dependence of the shear strength limit along the length of various threaded connections relates to the lengths of the metal reinforcement and its corresponding thickness. This article attempts to study the dependence of the shear strength of combined threaded connections on the thread parameters of the metal reinforcement part, the mode of joining thermoplastic molding with pressing, the diameter of the reinforcement, the wall thickness of the thermoplastic, and the length of the thread.