There are four basic types of threaded connection: bolt connection, double-end stud connection, screw connection and fixed screw connection. Common threaded connections for precision parts processing include bolts, studs, set screws, nuts, washers, etc. The structure and size of these parts have been standardized and can be selected according to the standard during design.
(1) Threaded connection features: simple structure, convenient assembly and disassembly, suitable for occasions where the thickness of the connecting piece is not large and can be assembled from both sides.
(2) Double-end stud connection feature: Screw the shorter end of the thread on the stud into the thread of one of the connected parts, and then remove it. It is suitable for the occasions where one of the connecting parts of the precision parts is thick and not suitable for through holes and needs to be disassembled frequently.
(3) Screw connection characteristics: used for occasions where one of the connected connectors is thick and not suitable for making through holes and does not require frequent assembly and disassembly. Due to multiple assembly and disassembly, the threaded holes will wear out.
(4) Tightening screw connection: Use the end of the screw to resist the surface of another connecting part, or push it into the pit of another connecting part to fix the relative position of the two parts, which can transmit a small lateral force Or torque.
Therefore, various threads are needed in the processing of precision parts. Each thread has its own characteristics and functions. The accuracy of workpiece processing is also related to the thread.