(4) Multi head large cross-section laser cutting equipment is mainly used to meet the requirements of laser batch processing under the premise of large-scale manufacturing.
(5) The automatic production line of laser cutting processing mainly solves the problems of batch production and labor saving. From unloading to completion, it has entered a new unmanned intelligent manufacturing mode, including automatic storage, automatic cutting, automatic carving, automatic sorting and assembly, automatic transportation and other full process automatic production lines.
(6) Three dimensional laser cutting technology is usually used for processing after body assembly, upper cover guide rail hole, antenna mounting hole, wheel mudguard shape correction, etc.
(7) Laser welding or laser hybrid welding of transmission gears of construction vehicles has a narrow welding heat affected zone with high strength. The depth and width of the weld may exceed 10:1. The mechanical property of the weld is higher than that of the base metal. It can minimize the deformation of multi welded gears that provide protection for large torque transmission of gears. After welding, the gear does not need finishing, and the laser composite welding technology is used. By welding the multi section arms of heavy cranes, efficient and stable single-sided welding and double-sided forming of special steel plates are realized, which reduces thermal deformation and eliminates the forming process after traditional welding methods.
(8) With the application of laser cladding technology, the wear of track expansion spring cylinder for high-performance bulldozer chassis needs to be repaired. The wear area is loaded by laser cladding, and the wear resistance index is measured in various ways. The hardness of the coating is reasonable and the surface hardness reaches the standard; The metallographic structure is good, and the service life of the spring of the power bulldozer is effectively extended.
Overcoming bottlenecks and seeking breakthroughs
In recent years, laser cutting, laser welding, laser cleaning and other laser processing technologies have unlimited application prospects in the field of engineering machinery, but opportunities and challenges coexist. In order to meet the needs of the follow-up development of China’s construction machinery industry, we must continue to increase efforts in the field of laser and its complete systems.
In recent years, China’s construction machinery industry has enjoyed a good momentum of development. The types of construction machinery include drilling machinery, transportation machinery, lifting machinery, industrial vehicles, road rollers, piling machinery, including concrete machinery. It is a large scale and wide field industry. Therefore, under the trend of high specialization and obvious subdivision, higher processing precision and difficulty are proposed for traditional enterprises, creating more space and opportunities for further application and development of laser technology.
With the maturity of laser technology, the type and thickness of cutting plates have been significantly improved. In addition to the original advantages of efficiency, quality and flexibility, laser technology has developed into an indispensable advanced processing technology in the construction machinery industry, such as excavators, engine covers, drive chambers, shovels, arms, rotors and other parts. Many workpieces need to cut a large number of round holes, square holes, and special-shaped holes on plates of various thicknesses with high precision requirements. The application demand of laser cutting in the future is not deep. It is understood that some dumper outsourcing processing enterprises purchase and use laser cutting equipment. “As long as we adhere to independent research and development, continue to strengthen technological innovation, and master the core technology, laser cutting technology will help the wider development of better construction machinery industry, and promote the domestic construction machinery manufacturing industry to truly go international.”
