Knowledge

Bearing is an indispensable part of modern mechanical equipment, its main function is to support the mechanical rotating body, reduce the friction coefficient of the mechanical rotating body in the process of movement, and ensure its rotation accuracy.

At present, there is no significant deficiency in the types, varieties and specifications of bearing products, and it basically has a relatively complete product line.However, the product mix is not very balanced.The production capacity of middle and low-end ordinary products has produced the situation of surplus, while the market of high-end products is still mostly occupied by foreign famous brand products.So far, no very significant breakthroughs have been made.

In recent years, Automatic Transmission (AT) has become more and more multi-stage in order to reduce the fuel consumption of cars.Due to changes in the AT multistage design, the needle roller and cage assemblies of planetary gears need to accommodate high speeds.In addition, multiple ATs lead to an increase in the number of components, requiring smaller and lighter needle roller and cage components to reduce weight.This causes the needle roller and cage assembly to be subjected to high loads to produce the same level of torque as a conventional AT.Moreover, in order to reduce the rotating resistance of the various components in the AT to save energy, the viscosity of the oil in the AT tends to decrease, and the operating conditions of the needle roller and cage components become more and more demanding.

Bearing temperature is too high, similar to the abnormal situation of "fever".It is a common and harmful fault of rotating equipment. If the reason is unknown and improper treatment, it will often get twice the result with half the effort, which will reduce the service life of bearings, increase the cost of maintenance, and even cause bearings to burn out. · Therefore, to quickly determine the cause of the failure and take appropriate measures to solve it is the guarantee of continuous and safe operation of the equipment.

Realists recently learned from Northwestern Polytechnical University: the School of Materials Professor Liu Dong and his team developed a strong rolling technology (PTR) has made a major breakthrough, cracked the problem of China's related industry development.

In 2020, China's bearing industry will achieve a total revenue of 193 billion yuan from its main business, with a year-on-year growth of 9.04%.It is mainly affected by the rapid growth of supporting bearing enterprises in infrastructure construction, such as wind power, engineering machinery, metallurgy and mining.

Bearing rollers are used in a wide range of applications, from heavy equipment and machinery to power generation, manufacturing and aerospace.This paper will introduce the knowledge of bearing roller processing steps in detail

The most commonly used oil bearing is powder metallurgy oil bearing.Through the preparation of powder, forming, sintering and impregnation of lubricating oil and other major processes made of bushing is called powder metallurgy oil bearing.Then how to calculate the powder weight of powder metallurgy oil-bearing bearing?

Bearing as an important part of the operation of mechanical equipment, when we find that the bearing in the process of operation, the shaft of the bearing always feels not moving, that is, the so-called bearing shaft operation is difficult?What's going on here?

Question 1: Will bearing steel rust? Will rust.Bearing steel, including stainless steel, rusts. Although stainless steel is known as stainless, it is also rusty, in fact, there is no stainless steel in the world!

Steel market trend wide rising over this week, this week timber prices constantly refresh historical thread, thermal highest volume exceeding RMB 6200 and 6700 respectively, the market continued to pull up, scrap steel market traders want to stay up, the arrival of the goods volume did not significantly improve individual traders actively delivery on Thursday, prices fell slightly, price falls present state on Friday,Steel mills today are 91 down, 0 up.

Since the festival, the steel market as a whole industry has risen in an all-round way, a number of varieties of goods is set nearly 10 new high prices.According to data, as of May 11, steel mining industry chain, spot price, iron ore up 49.19%, billet up 46.75%, rebar up 34.9%, wire up 36.11%, hot rolled plate coil up 46.87%, seamless pipe up 26.87%, stainless steel plate up 5.89%, profile overall up 5.69%.

Bearing is an important part of modern mechanical equipment, its main function is to support the mechanical rotating body, reduce the friction coefficient in the process of movement, and ensure the accuracy of rotation.Rolling bearings are generally composed of four parts: outer ring, inner ring, rolling body and cage.According to the shape of the rolling body, rolling bearings are divided into ball bearings and roller bearings.Although there are many types of rolling bearings, and there are differences in their structural types, tolerance levels, material selection and processing methods, the basic manufacturing process is similar. The following is a brief introduction to the processing technology of bearing parts:

Rolling mill bearings are used in the calendering industry, namely the calendering of nonferrous metals, ferrous metals and nonmetallic products.Used for bearing at roll diameter and roller of calendering roll system.Usually, four rows of cylindrical roller bearings are used to bear radial load, thrust roller or thrust ball bearings and centripetal angular contact ball or centripetal roller bearings are used to bear axial load. Now, most of them are lubricated by oil and gas lubrication or oil mist lubrication and grease.

On April 27, 2021, China Iron and Steel Association (CISA) released the first-quarter operation situation of the steel industry.According to the report, China's steel production in the first quarter overall stable, output maintained year-on-year growth.