1. Drum-shaped gear shaft sleeve tooth profile processing, from manual, electric pulse, hydraulic profiling to comprehensive CNC processing in China, the accuracy can fully meet the design requirements.Nitriding treatment can be carried out when hard tooth surface is required, or high-quality low-carbon alloy steel can be used for carburizing and quenching and grinding or scraping with an alloy knife to meet the design requirements. 
2. Development trend at home and abroad With the continuous development of technology, there are more and more drum gear couplings that require high precision and heavy-duty hard tooth surfaces.In foreign countries, the main parts of the heavy-duty high-precision drum gear coupling are made of low-carbon alloy high-quality steel, which is milled and ground after heat treatment with high machining accuracy. The depth of the heat-treated carburized layer is guaranteed by numerical control equipment. 
A company in the United States has conducted an analysis and research on drum gear couplings of several materials. The table is listed below: Material grade strength and wear resistance cost United States China 1045 45 1 1 1 4140 42 (nitriding) 2.5CrMo 1.33 1.78 4320 20 2CrNi4Mo 1.65 3.56 3310 12 2Cr3Ni5 2 4.6 15 The drum-shaped gear coupling used by German SMS company in the main drive mechanism of the rolling mill, the main material is 2Cr2Ni17 or 2 Cr2NiXNUMXMo, and the tooth surface is ground.
From the above two perspectives, the development of the hard-toothed drum gear coupling requires us to further improve the manufacturing process and equipment.The requirement of the interchangeability of the main parts of the drum gear coupling is worthy of our attention: in foreign countries, the parts of each specification of the drum gear coupling can be interchanged. If one of them is damaged, it can be replaced with a single spare part. , No need for overall replacement, which saves maintenance time and is convenient for users.
 In our country, the drum-shaped teeth with hard tooth surfaces are generally treated by nitriding. The hardened layer has a small service life and is not ideal. In recent years, Erzhong Group Corporation and Erzhong Basic Parts Factory have successfully developed carburized and ground Hard tooth surface drum-shaped gear coupling, the product is used by Baosteel, Tianjin Steel Pipe Company, etc.The problem of parts interchange: due to the manufacturing cost, we use CNC machine tools to meet the requirements of users, but from the perspective of the development situation in the future, the interchangeability of product parts should be guaranteed regardless of whether users have requirements or not. .
 3. Production and sales status and market forecasts began to develop drum gear couplings in the 1s and formulated national professional standards and machinery industry standards. It has been published and implemented for nearly 2 years and has basically replaced the original spur gear couplings. Because of its compact structure, large carrying capacity, small moment of inertia, and a certain axis offset compensation performance, it is widely used in various mechanical transmissions, and the coupling itself is a vulnerable part, every XNUMX to XNUMX years It needs to be replaced, so the market needs a large amount. The annual sales of drum-shaped gear couplings in Deyang alone are more than XNUMX million yuan.
It is estimated that domestic machinery, metallurgy, and heavy lifting and transportation will require no less than XNUMX million yuan per year. We hope that all manufacturers will increase technical investment, update equipment, and produce drum-shaped gear couplings that the market needs as soon as possible, so as to respond to my country’s technological development. Some contributions.