With people’s recognition of asphalt milling machines, this kind of equipment is now more common in the industry. The asphalt milling machine is equipped with an automatic leveling device, which uses the side cover of the milling rotor as the milling reference surface, and controls two positioning hydraulic cylinders to keep the given milling depth constant; its hydraulic system is used to drive the milling rotor to rotate and the whole machine Walking, auxiliary device work, etc., are generally closed hydraulic systems with multiple pumps each other, which ensure a good combination of new and old road materials during work and increase their service life.
The working principle of a small asphalt milling machine:
Using the reverse cutting principle of the large milling machine, the small asphalt milling machine relies on the forward high-speed rotation of the milling drum to swing several sets of hard tungsten steel alloy blades on the cutter shaft of the milling drum to hit the ground at high speed. The tungsten steel alloy teeth on the alloy blades are used to crush and grind the ground material, so as to achieve the surface milling treatment effect.
The use of small road milling machine:
1. The surface of the bridge deck is water-proof and shaved, and the surface flatness and water-proof treatment of the high-speed railway box girder.
2. Milling and planning of asphalt pavement, rutting, net cracking, and potholes. Clear the ice and snow from the bridge deck and road surface.
3. Lightly roughen the original old pavement before the new asphalt concrete paving, or cooperate with a large milling machine to complete the milling and roughening operations in the corner area and the densely populated area.
4. Remove the ground coating, paint, and various traffic markings; when the ground is damaged or dirty and needs to be refurbished, remove the old floor surface, etc.
5. Clear airport road markings, runway tire brake marks, etc., and regain a rough surface with a high friction coefficient.
6. Milling and leveling the over-elevated parts of the cement asphalt pavement, highway bridge deck, bridge staggered platform, and epoxy resin wear-resistant ground.
7. For the construction of the micro-surface of the road, the original old pavement surface layer should be milled and planned to prepare for the slurry seal.
The big cost of asphalt milling machine operation is the cost of diesel fuel consumption and the cost of replacing the milling cutter head. If the milling machine is working at full capacity every day, the daily fuel consumption can reach 1t. Milling cutter heads are important consumables. Every milling 10,000 m2 of asphalt pavement needs to replace all milling cutter heads, and the cost of each replacement is about 10,000 yuan. Compared with asphalt pavement, the loss of milling cutter head is greater on cement pavement. Labor costs, equipment repair and maintenance costs, etc. must be calculated separately.
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