Conveyor belts Rollers are often used in the transport of materials. Today we will briefly introduce the knowledge of the roller.
The roller is also called the roller. The production of rollers mainly consists of the initial rolling of the roller body, the static balance of the primary school, the interference assembly of the shaft head, the finishing of the car and the balancing of the fine school. If the geometrical tolerances such as roundness, cylindricity and straightness are required to be less than 0.2 mm, grinding on a cylindrical or roll grinder is required after finishing the car. If there is a requirement for surface hardness, it is necessary to increase the heat treatment process.
After the roll is formed, it needs surface treatment or coating such as painting, galvanizing, TEFLON spraying, rubber coating, chrome plating, ceramic spraying and oxidation for the purpose of rust prevention, corrosion resistance, wear resistance and support.
Regardless of the process, the structure, design, material selection and processing of the rolls should meet the following basic requirements:
1. The roller should be sufficiently rigid to ensure that the bending deformation does not exceed the allowable value under heavy load.
2. The surface of the roller should have sufficient hardness. It is generally required to reach above 50 degrees HRC and has strong corrosion resistance.
3. The working surface of the roller should be finely machined to ensure dimensional accuracy and surface roughness.
4. The material of the roller should have good thermal conductivity.
The roller is divided into a driving roller and a driven roller according to the purpose. According to the driving method, it is divided into a power roller and a powerless roller.
The non-powered conveying roller, also called the free roller, is composed of a cylinder, a shaft core, a deep groove ball bearing and a bearing mounting frame. In use, it is used for auxiliary rolling, and has no power and is rolled by external force.
There are drive rollers generally referred to as built-in motor drums. Here we also refer to rollers with sprocket wheels, timing pulleys, etc. that can be driven by geared motors. The structure is basically the same as that of no power, except that the motor is built in or a sprocket or timing pulley is added to the outside to drive other components that can be driven by the geared motor.