At present, the components required for high-end manufacturing fields such as aerospace, energy and power are developing in the direction of large-scale, integration and complexity, conforming to market demand, and laser selection melting equipment is also upgrading to a larger size and more laser beams.
As an advanced metal additive manufacturing overall solution provider in China, LiM Laser provides R&D and manufacturing of metal 3D printing equipment and customized production of complex metal components for high-end manufacturing fields such as aerospace, energy and power. Lim Laser has a profound theoretical foundation and rich practical experience. In view of the pain points such as the forming efficiency and forming quality of large-size parts, the company released the large-format and multi-laser LiM-X1500HF series equipment, and creatively proposed the "flight printing" technical solution around the key difficulties such as how to ensure the stability of large-size equipment, forming efficiency and dust removal efficiency.
Multi-laser, large format - productivity upgrade
The forming size of LiM-X1500HF series equipment is 1500mm×1500mm×1650mm, and the super-large format design can meet the needs of small-batch production of large-size parts, large-size parts combination manufacturing, and small-size parts mass production in aerospace and other fields.
Equipment 16 laser beam and 20 laser beam freely optional, forming speed ≥400cm3/h 16 laser, ≥500cm3/h 20 laser. In addition to printing efficiency, the powder laying efficiency has also been improved. LiM-X1500HF adopts intelligent dynamic variable speed powder laying strategy, single scraper bidirectional powder laying, compared with one-way powder laying, efficiency increased by 60%, full-size printing time can save 67h.
First "flying printing" technology - ensure forming efficiency
"Flying printing" is a mobile multi-beam system, which carries out the printing task by moving the module composed of multiple galvanometer devices one by one along the same direction. During this period, the adjacent galvanometer system uses a multi-galvanometer splintering method to print, uses a limited number of galvanometers, expands the printing range, and sets a lap area between the printing areas of adjacent stations to ensure the printing quality. The X/Y format printing accuracy is ≤±0.1mm, the Z-axis accuracy is controlled at ±5μm, and the surface roughness Ra is better than 6.3μm.
Printing equipment: LiM-X1500HF
Printing material: Superalloy (GH3625)
The part is large-size full-format printing, and the forming format of the part is 1470mm×1470mm
LiM Laser improves the accuracy and stability of the lap joint through structural design optimization and lap alignment control. The minimum mechanical properties of the multi-laser lapping region are not less than 95% of the average value of the single laser region. The consistency difference of mechanical properties in the whole format does not exceed 5%; Nickel-based superalloy, aluminum alloy, titanium alloy, stainless steel and other materials, the standard sample bar has excellent tensile properties at room temperature.
Configuration optimization and upgrading to ensure high-quality, efficient and high-speed forming
LiM Laser provides new optimizations for tuyere and field control to meet "flying print" requirements. The "flight device" is equipped with a movable dust removal tuyere to realize the tuyere moving with the vibration mirror, so that the span between the blower and the suction tuyere is shortened to 300mm, reducing the difficulty of smoke removal and realizing efficient dust removal; The wind field design, simulation calculation and repeated physical tests have realized that the uniformity of the wind field in the cabin during large format printing is less than 10%, which meets the requirements of more laser forming in larger format and ensures the forming quality.
LiM-X1500HF equipment is equipped with Z-axis precision drive system, Z-axis ultra-heavy double drive balance system movement adopts servo motor with precision ball screw, guide rail and high precision grating rule closed loop control: The self-developed dual motor drive system is used to control the motion of the forming cylinder, and the high-precision grating rule provides real-time position feedback and dual drive synchronous closed-loop control of the forming axis movement, ensuring the Z-axis positioning accuracy is better than 10μm, and the repeated positioning accuracy is better than 5μm.
Equipped with mature intelligent monitoring system, with forming chamber oxygen content monitoring function, automatic alarm over limit; It is equipped with powder laying monitoring module, which can realize the monitoring of powder laying quality and melting quality of each layer, automatic powder filling and automatic alarm for abnormal powder laying.
Optional automatic powder circulation system: the system automatically and efficiently completes the overflow powder recovery, screening and supply during printing. The whole system adopts vacuum pump negative pressure conveying technology, efficient powder cleaning; The powder is fully enclosed in the printing cycle to avoid direct exposure and reduce operator contact; The system has a large capacity powder collection bin, which can meet the whole machine powder recovery; Equipped with an independent powder circuit supporting environmental monitoring to ensure the stability of oxygen content and pressure in the forming chamber of the main equipment.
Self-developed supporting software to meet the needs of smart factories
Equipped with LiMPCS-X1500HF special software with independent intellectual property rights, it can further optimize the characteristics of multi-laser large format equipment, and realize multi-optical partition optimization to improve printing efficiency and lap quality; The printing process can be intelligently monitored and recorded to ensure full traceability; Function modular expansion, can be customized development; Rich software interfaces to meet the needs of smart factory production control, to help large-scale manufacturing.
Safe and reliable, to ensure continuous and stable production
LiM-X1500HF machine adopts safety redundancy design to ensure safe and stable operation. Equipped with a fully enclosed structure cleaning chamber, the powder is sucked out by an independent powder suction machine under full inert gas protection, and the suction speed can reach 8L/min, which realizes the separation of human powder and the safe treatment of powder. In addition, there is a pressure control system, when the pressure of the forming chamber is higher than the safety setting value, the intake air is automatically cut off and the pressure is actively relieved; Oxygen sensor redundancy design, when the equipment or environment oxygen content is below the set value of the alarm; Perfect electrostatic treatment system OD5+ laser protective glass protection, safety interlock system, etc., to ensure continuous, stable and safe production.
Gather wisdom, gather strength, walk towards the light. The LIM-X1500HF flight printing solution released by LiM Laser not only provides a new idea and direction for large-size parts manufacturing in aerospace and other fields, but also helps users to produce high-quality and efficient production, and provides more imagination for the innovative development of metal 3D printing technology. In the future, LiM Laser will continue to refine its technology, refine its process, and continue to provide users with overall solutions for metal 3D printing based on market demand, anchor new coordinates for future development, and lead intelligent manufacturing production.
