Why is the manufacturing process of the pin coupling relatively complicated

The process of the pin coupling is relatively complicated, and its manufacturing procedure is slightly more complicated than that of the general coupling, but it is more convenient to disassemble. It can be easily assembled and disassembled without moving the half couplings on the two shafts.The material of the elastic pin is generally nylon 6. The elastic pin is sheared when working, and its working reliability is poor. Because it can transmit huge torque, it requires a very low medium-speed transmission shaft to work, so it must be used when using it. note.Fractures in the cross section of the pin coupling will also reduce the plasticity and toughness of the steel, which will make the machining dimensions unstable and the tools wear quickly.The successive changes in the metallographic structure caused by heating also cause stress, which is called tissue stress.Overheating is not conducive to heat treatment, making steel brittle and reducing mechanical properties, but it can be eliminated by normalizing or annealing after forging.

The following points should be paid attention to when the pin coupling is overhauled:

0.2. When processing the spare parts of the elastic ring, pay attention to the conformity of the material and the correct size. The inner hole of the elastic ring and the pin should have an interference of 0.4mm~0.5mm.After assembly, positioning and tightening, there should be a clearance of 1.0mm~XNUMXmm between the outer circle of the elastic ring and the pin hole.The elastic ring should be the same size, and the elastic rings of different sizes cannot be mixed, especially the elastic ring on the same pin should be replaced with a new one. If the old one is used, the old one shall be used uniformly. The degree of wear and damage of the elastic ring is not very vivid, avoiding the mixing of new and old.If the gap between the elastic ring and the pin hole does not meet the requirements after installation, the outer circle of the elastic ring can be trimmed with a fine file if there are no spare parts or other unavoidable circumstances to make it meet the gap requirements.

XNUMX. The positioning taper hole of the pin coupling plays a role in positioning the pin bolt, so the matching part of the taper hole should be carefully checked.Those found to be defective, worn, or deformed on the cone surface should be dealt with or replaced.When processing the stud bolt, it should be processed in accordance with the manufacturer's original drawing.If there is no manufacturer’s original drawings, please pay special attention to the accuracy of the taper size of the taper hole when surveying and mapping parts. Inconsistent taper will result in improper installation of studs or skewed positioning, causing equipment operation defects.

XNUMX. The stud bolts should be carefully inspected to check their straightness, surface finish, and surface roundness.Those who have defects such as bending deformation and uneven surface should be replaced.

XNUMX. Before disassembling the coupling, make an alignment mark on the coupling. When reinstalling, the two couplings should be aligned with the mark to connect, so as to minimize the impact of the coupling on the dynamic balance of the shaft system before and after the coupling.Before disassembling the pin, the pin and pin hole should be numbered correspondingly, and reinstall it when reinstalling.The loose parts such as nuts, gaskets, spacer rings, elastic rings and so on should be combined and stored in sets to prevent the loose parts from being lost or disordered, and to prevent accidental dynamic imbalance after installation.

XNUMX. When disassembling and assembling the elastic pin of the pin coupling, it is strictly forbidden to hit hard to prevent the pin from being deformed, the thread is damaged, the thread part is bent, and the pin hole is roughened.When beating, a red copper rod should be placed on the nut to vibrate from the front, so that it will not damage the thread, and will not cause deformation due to excessive force.

XNUMX. The spacer ring plays the role of positioning the elastic ring and generating appropriate tightening force on the elastic ring. Therefore, the two ends of the ring should be flat and free of protrusions, and the end surface should be smoothed with a file.There should be a gap between the inner hole and the pin, so that it can be easily inserted without jamming.The width dimension should meet the requirements of the drawings.If the width dimension is too large, it should be replaced.

The nylon pin of the pin coupling is made of nylon 6, which has good lubricating properties and does not require lubricating oil. It not only cleans the working environment, but also makes it easy to clean.The pin coupling has the performance of compensating the relative deviation of the two shafts. It is suitable for medium and high power transmission, and is not suitable for working parts that require vibration reduction and strict noise control.The material of the elastic element pin is generally selected from nylon, which has the ability to slightly compensate for the deviation of the two axes. The elastic part is sheared during operation and has poor working reliability. It is only suitable for medium-speed transmission shafts with very low requirements, and is not suitable for working reliability. More demanding conditions.The pin coupling may be a little complicated to install, but its relative displacement ability is very good. In addition, it is also very convenient in delivering torque. It is very popular with users because it can transmit huge torque.

Original article by the pin coupling manufacturer, please indicate the source address for reprinting: http://www.hbcrjx.com