Main structure and working principle of milling machine

Pavement milling machine is one of the main equipment for asphalt concrete pavement maintenance and construction. It is mainly used for the excavation and renovation of asphalt concrete surfaces such as highways, urban roads, airports, and freight yards. It can also be used to remove road bumps and oil waves. , Reticulation, rutting and other defects, can also be used to excavate pavement pots and grooves, as well as roughening of cement pavement and milling of staggered surface layers. Is it very versatile? It is really a convenient big guy. Knowing the purpose, what is the working principle of the milling machine? Do you understand the main structure?

It is the most economical and modern maintenance method to use a road milling machine to mill the damaged old pavement, and then to lay the new surface layer. Because of its high work efficiency, simple construction technology, easy control of the milling depth, convenient and flexible operation, and good maneuverability, Milling old materials can be directly recycled, etc., so they are widely used in urban municipal roads and highway maintenance projects.

A general milling machine is composed of an engine frame, a milling rotor, a milling depth adjustment device, hydraulic components, an aggregate conveying device, a steering system, and a braking system.

1. The milling rotor is the main working part of the milling machine. It is composed of the milling rotor shaft, tool holder and cutter head. It directly contacts the road surface and achieves the purpose of milling by working with its high-speed rotating milling cutter.
The milling machine is equipped with an automatic leveling device, the milling rotor side cover is used as the milling reference surface, and two positioning hydraulic cylinders are controlled to keep the given milling depth constant;
2. The hydraulic system is used to drive the rotation of the milling rotor, the whole machine to walk, and the work of auxiliary devices, etc. It is generally a closed hydraulic system with multiple pumps independent of each other, which does not interfere with each other and has high reliability;
3. Some milling machines are equipped with a tilt adjuster as needed to control the inclination of the rotor; general large-scale milling machines have an aggregate conveying device composed of a conveyor belt and a collector, which can remove the milled bulk material Concentrated and transported to the randomly walking transport vehicles, the height of the conveying arm can be adjusted and can swing left and right to adjust the unloading position.
4. When the specifications and models of the milling machine are different, the structure and layout are slightly different, but the basic working principle is the same or similar.
The route of the power transmission of the milling machine: engine→hydraulic pump→hydraulic motor, hydraulic cylinder→working device.


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Post time: Dec-22-2021