Rubber Coated Pulley

Lagging materials: natural rubber, nitrile rubber, chloroprene rubber, EPDM rubber, polyurethane, etc. can be used.

Rubberized roller technology is divided into two categories. Traditional rubber lagging such as hot vulcanization lagging technology mainly vulcanizes the rubber and the roller through a vulcanization tank to ensure the bonding strength between the rubberized panel and the roller. The second type is cold vulcanization. The rubber coating technology uses a special cold vulcanization method to directly bond the roller and the rubber coating panel. It can be used for on-site coating and underground coating. Its technology is relatively advanced and also greatly reduces labor costs.

Manufacturing process: Generally speaking, the main shaft of the drum can be divided into the following two types according to the load condition:

(1) The mandrel only bears bending moment, such as the shaft of the redirecting drum set;

(2) The rotating shaft bears bending moment and torque at the same time, such as the shaft of the transmission roller set; the material of the shaft is generally rolled or forged carbon steel or alloy steel. The usual material is medium carbon steel, and No. 45 steel is the more common. Commonly used, for shafts with large forces and limited size, as well as shafts with certain special requirements, alloy steel can be used, and the selected material is chromium 40. As needed, the shaft generally needs to undergo heat treatment or surface strengthening treatment to improve its mechanics. Performance and wear resistance, etc., under normal temperatures, the elastic modulus of alloy steel and carbon steel are very different, so the stiffness of the shaft cannot be improved by using alloy steel; the material of the shaft is generally quenched and tempered, and for the transmission roller When the shaft strength index does not meet the requirements, you can also choose to combine the quenching and tempering treatments and check them according to the symmetrical cyclic bending allowable stress;The technical requirements for barrel skin design are:(1) The barrel skin must be curled along the rolling direction of the steel plate;(2) The misalignment at the joint shall not be greater than 1 mm;

(3) The longitudinal welds after the drum is rubberized must undergo ultrasonic or X-ray flaw detection:① Ultrasonic flaw detection is carried out for 10% of the time, and the weld reaches the second level in the standard;② Radiographic flaw detection starts from one end and detects 20% of the total length, and the weld reaches the national standard level two. If the flaw detection length is doubled, if the flaw detection length is still unqualified after doubling, the full length flaw detection will be carried out until the requirements are met;

(4) The roundness tolerance of the rolled skin should not exceed 0.5;

(5) Material: Q235 steel, yield strength is 235 N/m2; for medium-sized roller sets and light-duty roller sets, when the outer diameter of the hub is greater than 220mm, cast steel is used; for light-duty roller sets, when the outer diameter of the wheel hub is less than 220mm When using hot-rolled round steel, it should comply with national standards.

Application areas: steel, metallurgy, coal, cement, power generation, fertilizer, grain depots, ports and other industries.