Advantages of laser cladding equipment for hydraulic cylinders in the remanufacturing of shield machines?

Hydraulic rod laser cladding equipment Laser cladding technology is a surface modification technology that adds cladding powder material to the surface of the substrate that needs to be repaired or strengthened. Then, it uses the high energy of the laser to form a metallurgical bond between the powder and the substrate, forming a cladding layer with wear resistance, corrosion resistance, oxidation resistance, or electrical properties, thereby achieving basic repair or surface modification and improving the service life of the parts.

Hydraulic rod laser cladding equipment Advantages:

(1) This process is easy to automate and is suitable for wear repair of common easily damaged parts;

(2) The coating dilution rate is low, and a strong metallurgical bond or interfacial diffusion bond is formed with the substrate. The coating composition and dilution rate are controllable;

(3) Selective deposition can be performed, material consumption is low, and the cost performance is high;

(4) There are almost no restrictions on powder selection, especially when depositing high-melting-point alloys on low-melting-point metal surfaces;

(5) The cladding layer thickness range is large;

(6) The heat input and deformation are small, especially when high-power density rapid cladding is used, the deformation can be reduced to the assembly tolerance of the parts;

(7) The cooling process is rapid solidification, which is easy to obtain a fine crystal structure or produce new phases that cannot be obtained at equilibrium, such as unstable phases.

Based on the above advantages, hydraulic rod laser cladding equipment has been applied to more and more industrial fields, including power, automobile, coal, petroleum, railway, and aviation industries.

As a special engineering machine for tunnel excavation, the shield machine needs to be customized according to different engineering geological conditions, and the price is very high. In particular, the price of hard rock excavators and mud-balance shield machines for river and sea tunnels is relatively high. According to industry regulations, shield machines that have reached their design service life must be scrapped, which is a huge waste. According to relevant statistics, since 2013, the situation in China where shield machines have reached their design service life has entered a high-incidence period. When the shield machine reaches its design service life, it must be scrapped and eliminated. This will not only result in the loss of a large amount of funds and resources, but also requires the recycling and processing of the metal materials of the discarded shield machines, which is also easy to pollute the environment. The rise of remanufacturing technology for hydraulic rod laser cladding equipment provides a solution to this problem.

Due to harsh working conditions, many parts of the shield machine will be subjected to long-term and high-intensity wear and corrosion. The wear of the shield cutter has become a key factor affecting the quality and progress of shield construction. The long procurement cycle, high cost, and difficulty of cutter procurement, as well as the complexity of replacement, affect the quality of the entire project and delay the construction period. Laser cladding technology has unique advantages in repairing worn parts and improving their wear resistance and corrosion resistance. After repair processing, the cutter surface is coated with a high-hardness, high-wear-resistant coating, which can effectively improve the service life of the cutter. After laser cladding with hydraulic rod laser cladding equipment, in addition to the rolling mill, other easily damaged parts of the shield machine can be repaired using laser cladding technology to extend their service life.

During the "Thirteenth Five-Year Plan" period, the pace of urban infrastructure construction in China will further accelerate. The scale of development and construction of urban underground spaces such as urban rail transit and underground integrated corridors will also continue to expand. Hydraulic rod laser cladding equipment This provides a good opportunity for the application of laser cladding in the remanufacturing field of shield machines.