Introduction to the characteristics of flange coupling

Published: 2017-12-15

Flange coupling is a coupling with a very simple structure, which is mainly composed of two halves of coupling and connecting bolts.The main processing procedures of flange couplings include boring, cutting and keyway trimming before assembly of the coupling sleeve hole, and processing the end face of the coupling and other surfaces.The sleeve hole of the semi-coupling has two forms: a conical hole and a cylindrical hole. The conical hole has more advantages in the process characteristics than the cylindrical hole. The end face processing of the coupling is often carried out on the shaft, which is In order to make the tenon on the end face of the coupling accurately concentric with the axis, special attention should be paid to the perpendicularity between the end face of the coupling and the rotor shaft in this processing process, and attention should be paid to whether the alignment of the center tenon meets the requirements.For flange couplings without centering tenon, the two half couplings should be sleeved together for reaming after drilling.

The conical shaft sleeve hole is easy to obtain the concentricity between the mating parts, the contact between the coupling and the shaft mating surface can achieve a better fit, and the inspection is more convenient, so the use of conical holes is more common.Semi-couplings are generally made of forgings, leaving a margin of 2-3mm on each side during rough machining, and the residual stress heat treatment is required for the boring process.The boring of the coupling is usually carried out on a lathe, because the machining of the coupling sleeve hole is very demanding, so the finishing of the hole is usually done by grinding.The finish machining of the outer surface of the coupling is carried out in the same clamping as the boring.The size of the processed hole and the contact between the hole and the shaft mating surface need to be inspected. For mass-produced couplings, generally taper-like columns can be used for interchangeability of parts.Single-piece couplings can be inspected by fitting the coupling on the shaft end.If the fit between the shaft and the hole does not meet the requirements, the hole of the coupling can be repaired.