How to choose excavator milling head? Working Performance Index of excavator milling head

Writer： admin Time：2023-02-17 15:26:41 Browse：255℃

According to the principle of cutting and excavation, the factors affecting the efficiency of cutting construction include the geological conditions of surrounding rock and equipment performance. The principle of cutting and crushing is to cut, grind and break the surrounding rock. The geological conditions of the surrounding rock mainly include three factors: the physical and mechanical properties of the rock, usually the strength and wear resistance of the rock;

Rock structure, including the relative relationship between rock inclination and tunnel axis, that is, rock joints, interstitial intervals and distribution; geohydrological environment, interstitial water abundance, etc. the strength of the rock. The process of cutting and destroying rock by cutting equipment is the process of rock from elasticity to plasticity to destruction, so the rock strength is directly related to the crushing efficiency of the cutting machine.

Excavator milling head, as a new type of engineering equipment, has only been born for more than ten years. According to the actual needs of the project, a series of horizontal and vertical excavator milling heads were designed and developed. At present, the company has mastered the advanced excavator milling head design, research and development and manufacturing technology.  

The excavator milling head is developed by the excavator, and the design of the excavator milling head is the same as that of the excavator cutting head. The research and development of overseas excavation equipment has a history of nearly 80 years. After a lot of experiments, many countries have established mathematical stress models for cutting teeth and cutting heads. On this basis, Germany has found the optimal design and method of the cutting mechanism through analysis and research. On the basis of these theories, the design and development of the excavator milling head further expanded the application range of the excavator. The company applies computer simulation, dynamic visual design, finite element analysis, optimization design and other advanced technologies to the design and research of excavator milling heads, which promotes the rapid development of cutting theory of excavator milling heads.

With the application and promotion of new technologies, equipment and construction techniques in tunnel construction, how to determine the cost price of unconventional drilling and explosion construction tunnels and define whether the bidding price is lower than the cost price has become the most difficult problem for bid evaluation experts. The cutting method takes the cutting machine as the core, and selects other mechanical static crushing and controlled blasting tunnel excavation methods for tunnel excavation construction. The ration establishment of cutting construction tunnels is very different from that of conventional mining tunnels. Reasonable quota preparation is needed to guide the collection, sorting and storage of data during the cutting construction process, and provide a simple, feasible and easy-to-control quota calculation method for the tunnel construction bidding process.

With the development of tunnel engineering construction, tunnel construction often passes through existing traffic structures, buildings, pipelines, goafs, etc. , the problems of surface settlement and blasting vibration caused by tunnel construction have become increasingly prominent. "The milling method centered on the milling head of the excavator can deal with this problem well. The milling method uses the milling machine to cut. The principle of excavating rock and soil is completely different from the traditional mining method of tunnel blasting to excavate rock and soil. The traditional The mining tunnel surrounding rock classification method is not suitable for milling tunnels. Therefore, the study of tunnel surrounding rock classification under the milling construction conditions is not only the need for the exploration of the milling method itself, but also conducive to speeding up the tunnel construction speed and improving the quality of the tunnel construction. At present, there are few explorations on the classification of the surrounding rock of milling excavation tunnels at home and abroad, and there is no recognized method for grading the surrounding rocks of milling excavation tunnels.