Mechanical Knowledge Base: "Milling Machine"

Pavement milling machine is one of the main models of asphalt pavement maintenance construction machinery. It is mainly used for the removal of asphalt, concrete, oil, waves, rugs, etc. on highways and city roads.

The use of a road milling machine to mill the damaged old storey and then lay a new surface layer is one of the most economical modern maintenance methods due to its high work efficiency, simple construction process, easy control of milling depth, convenient and flexible operation, and good maneuverability. Milled old materials can be directly recycled, and are therefore widely used in urban municipal roads and highway maintenance projects.

classification

First, classification and application

According to the form of milling, milling machines can be divided into cold milling and hot milling. The cold milling configuration has larger power, faster tool wear, and evenly-sized cutting material. The sprinkler can be used to spray water. It is widely used and the product has become a series; hot milling has complicated structure due to the addition of heating devices. Road surface regeneration.

According to the direction of rotation of the milling rotor, it can be divided into two types, crush milling and reverse milling. The rotation direction of the rotor is the same as the rotation direction of the wheel when the milling machine is walking, and the reverse direction is the reverse direction.

According to the structural characteristics, it is divided into two types: wheel type and track type. Wheel maneuverability is good, and the transition is convenient, especially suitable for small and medium-sized road operations; crawler type is mostly milling machine with a width of 2000mm or more.

There are old material recovery devices, suitable for large-area road surface regeneration projects.

According to the position of milling rotor, it can be divided into rear suspension type, middle suspension type and coaxial type with rear axle. The rear suspension means that the milling rotor is suspended at the rear of the rear axle; the middle suspension type is the milling rotor between the front and rear axles; and the rear axle is coaxial and the milling rotor is arranged coaxially with the rear axle.

According to the working width of the milling rotor, it can be divided into three types: small, medium and large. Milling width of the small milling machine is 300~800mm. The transmission mode of the milling rotor is mostly mechanical. It is mainly suitable for the pavement maintenance with a construction area of ​​less than 100M2; the milling width of the medium-sized milling machine is 1000~2000mm, and the milling rotor is driven. The hydraulic pressure type is mostly used; the milling width of the large milling machine is more than 2000mm. It is generally used together with other machinery to form a complete set of equipment for road surface regeneration and repair. The milling rotor transmission mode is mostly hydraulic type.

According to the transmission mode is divided into two types of mechanical and hydraulic. Mechanical work is reliable, maintenance is convenient, transmission efficiency is high, and manufacturing cost is low, but its structure is complex, operation is not easy, operation efficiency is low, and traction is small, and it is suitable for small-scale road surface maintenance operations with shallow cutting; the hydraulic structure is compact The utility model has the advantages of light operation, flexibility, and large traction, but the manufacturing cost is high and the maintenance is difficult. The utility model is suitable for deep-cut medium and large-scale pavement maintenance operations.