At present, China has a large gap with foreign countries in terms of manufacturing consistency, processing efficiency, measurement accuracy, test methods and production cost control. It is still unable to break through the deterministic manufacturing of key mechanism from the working mechanism research to the nozzle development process. Bottlenecks in precision testing, precision testing and accurate analysis of local or overall performance.
The technical system to be developed by the New Technology Laboratory of the Institute of Engineering Thermophysics of the Chinese Academy of Sciences integrates nozzle optimization design, additive manufacturing, post-processing and inspection to develop an integrated lightweight topology optimization design based on additive manufacturing technology, laser pointer Selective zone melting process design and forming, post-production processing and testing technology research, master the structural optimization design method based on additive manufacturing, establish a high-temperature alloy laser selection melting process database, complete the laser selection fusion common technology research.
1. Pre-swirl nozzle optimization design technology for additive manufacturing process
Based on the full investigation of the performance and function of the nozzle, the new technology laboratory determines the load state from the perspectives of process, efficiency, cost and service environment, and carries out the original five components of the nozzle housing. The overall design, and a variety of topology optimization schemes for the integrated parts, select three optimization results that meet the theoretical calculation performance requirements.
2. Laser pointer selection control control technology for high performance metal components
Conducting the design process of laser selective pre-swirl nozzle laser selection and melting additive manufacturing, including process route planning, process parameter influence analysis, process control pose design, process support structure design, and forming and manufacturing nozzle parts, verifying optimized design structure Machinability.
3. Part Forming - Process Verification
In order to verify the process support and sintering parameters, the new technology laboratory has formed the turbine disk, cyclone, small gas turbine nozzle and other parts, and through the process problems in the forming process, the support and sintering parameters are continuously changed, forming a 4 combinations of support structures.
The project provided optimized design and manufacturing services for various difficult parts in the design department, and improved the research and manufacturing capabilities of the institute.