In modern road construction and maintenance, milling machines have become indispensable core equipment due to their high efficiency and precision. Whether it is repairing damaged road surfaces, adjusting road elevations, or cooperating with Cat graders to complete fine leveling operations, milling machines can significantly improve engineering efficiency。
1. What is the function of a milling machine?/Quelle est la fonction d’une fraiseuse ?/¿Cuál es la función de una fresadora?
Pavement milling machine is one of the main equipment for asphalt concrete pavement maintenance and construction. Its main functions are as follows:
1) Road surface renovation: used for excavation and renovation of asphalt concrete surface layers on highways, urban roads, airports, etc.
2) Defect removal: It can remove defects such as oil waves, web patterns, ruts, etc. on the road surface.
3) Pothole excavation: used to excavate potholes and trenches on the road surface.
4) Cement pavement treatment: It can be used for roughening cement pavement and milling the misaligned surface.
5) Economical maintenance: Milling off the damaged old coating and then laying a new surface layer is an economical and modern maintenance method.
2. Core application scenarios of milling machines/Principaux scénarios d’application des fraiseuses/Principales escenarios de aplicación de las fresadoras
1) Pavement repair and damage treatment/Réparation et traitement des dommages aux chaussées
o Rutting and bump repair: The milling machine can quickly repair road defects with its milling function, making the entire road surface flat and laying the foundation for subsequent paving or leveling operations with a motor grader blade.
o Pothole repair: The use of milling machines in road renovation projects can cut out damaged areas and arrange new materials to fill them. After compaction, they can be consistent with the original road surface and achieve the original horizontal elevation.
2) Road renovation and regeneration/Rénovation et régénération des routes
o White to black project: The milling machine can make the side filler position in a flat state, the depth is relatively balanced, and form a toothed geometric surface. Combined with mini road graders for sale (small grader) for fine leveling, it can extend the life of the road.
o Recycling of old materials: Because the specific cutting depth can be clearly determined, the materials cut by the milling machine are in a small particle state and are not contaminated. They do not need to be processed again and can be directly used on site. The milling material (RAP) can be directly used for thermal regeneration, which can improve the utilization rate of materials, reduce material costs, and reduce the cost of road maintenance projects, which is in line with environmental protection trends.
3) Functional construction/Construction fonctionnelle
o Road marking milling: After snow removal in winter, the road marking groove is repaired by fine milling technology to avoid secondary damage.
o Anti-slip texture processing: Increase the friction coefficient of the road surface, especially suitable for high-risk areas such as highway curves.
3. Collaborative operation of milling machine and grader/Fonctionnement collaboratif de la fraiseuse et de la calibreuse/Funcionamiento colaborativo de la fresadora y la clasificadora
In road construction, milling machines are often used in conjunction with Caterpillar graders to form an efficient operation chain:
1). Milling-leveling integration: After the milling machine removes the old road surface, the Cat grader quickly completes the base leveling, reducing construction time.
2). Cost optimization: Choosing used for sale (second-hand grader) or second hand for sale (second-hand equipment) can reduce equipment procurement costs, especially suitable for small and medium-sized projects.
3). Fine-tuned construction: After the milling machine treats the local defects, the motor grader blade is used to adjust the slope and drainage design to improve the functionality of the road.
4. Operation precautions and maintenance points/Précautions d’utilisation et points d’entretien/Precauciones de operación y puntos de mantenimiento
1). Safety operation specifications
Equipment inspection
a) The milling cutter shaft should be checked daily and replaced if the groove worn on it exceeds 25% of the cutter shaft diameter.
b) Before using the equipment, check that the hydraulic system is leak-free to avoid construction delays due to malfunctions.
c) Check the engine oil level before each operation and clean the air filter after use.
d) Grease the bearings every 4 hours of use. When applying grease, rotate the milling drum while applying it so that the grease is spread throughout the bearing.
e) Visually inspect the machine before each operation: Are all fasteners tightened? Are there any parts that are obviously worn or cracked? Is the oil supply line intact? Check the bearings and whether each protective cover is covered, etc.
f) Before each operation, check the belt tightness. The new belt should be re-adjusted after 4 hours of operation. The belt must be kept at an appropriate tightness to transmit the engine’s output horsepower to the milling drum. A belt that is too tight will easily wear out and shorten the life of the bearing. If there are broken marks or severely worn belts, they should be replaced immediately.
g) Check the milling cutter shaft and bearings every time you change the milling cutter arrangement. If there are worn grooves on the shaft, you need to replace it with a new one. When changing the shaft, you need to change the bearings at the same time.
h) If the milling drum is properly maintained, it can usually be used for 3 months. When replacing the milling cutter or doing maintenance, check whether the center axis of the milling drum has cracks, whether the sleeve hole has become oval, and whether there are cracks in the weld. If any damage is found, replace it with a new drum.
i) When checking the milling drum at the bottom of the milling machine, the machine must be tipped forwards and never tipped backwards, otherwise the oil will flow back into the engine cylinder.
o Dust control: Turn on the spray system to reduce PM10 emissions and meet urban environmental protection requirements.
2). Technical parameter optimization
o Speed matching: Adjust the feed speed according to the hardness of the material. The asphalt layer is recommended to be 3-5cm deep, and concrete needs to be milled in batches.
o Tool management: Check tool wear every 6-8 hours. Replace tool as a set to extend service life and ensure construction quality.
3). Maintenance strategy
o Daily cleaning: Clean the milling material in time to prevent clogging of the belt and transmission system.
o Regular lubrication: Focus on maintaining the milling drum bearings and use high-temperature grease to reduce friction losses.
o System inspection: Regularly replace hydraulic oil and filter elements to ensure equipment stability and avoid high maintenance costs.
5. Equipment selection and cost control suggestions/
Suggestions de sélection d’équipement et de contrôle des coûts/
Sugerencias para la selección de equipos y control de costos
1). Select the model as required
o Large projects: Select equipment with milling width > 2m and match it with Caterpillar motor graders for sale to achieve efficient joint operation.
o Municipal engineering: Small milling machines (width 0.5-1.3m) are flexible and adaptable to narrow areas, with lower costs.
20. Second-hand equipment considerations
o If your budget is limited, you can consider second hand for sale or used for sale, but you need to strictly inspect the core components such as the engine and hydraulic system.
3). Cost comparison
o New machines are more expensive, but have better long-term reliability; used equipment (30%-50% cheaper) is suitable for short-term or low-frequency projects.
6. Future trends: intelligence and greening/Tendances futures : intelligence et écologisation/Tendencias futuras: inteligencia y ecologización
• Intelligent control: The 3D automatic leveling system improves milling accuracy and works with the Cat grader’s GPS technology to achieve digital management of the entire process13.
• Electric equipment: Electric milling machines and graders reduce carbon emissions and are suitable for urban areas with strict environmental control.
Conclusion
The coordinated application of milling machines and Caterpillar motor graders provides an efficient and economical solution for road construction. Whether you choose mini road graders for sale or professional-grade equipment, reasonable operation and scientific maintenance are the key to extending equipment life and reducing the overall cost of grader price.
L’application coordonnée de fraiseuses et de niveleuses Caterpillar offre une solution efficace et économique pour la construction de routes. Que vous choisissiez des mini niveleuses à vendre ou des équipements de qualité professionnelle, un fonctionnement raisonnable et un entretien scientifique sont la clé pour prolonger la durée de vie de l’équipement et réduire le coût global du prix de la niveleuse.
La aplicación coordinada de fresadoras y motoniveladoras Caterpillar proporciona una solución eficiente y económica para la construcción de carreteras. Ya sea que elija mininiveladoras para la venta o equipos de calidad profesional, la operación razonable y el mantenimiento científico son la clave para extender la vida útil del equipo y reducir el costo general del precio de la niveladora.
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Post time: Apr-16-2025