2. Key parts and processing requirements for aircraft engines
The key components of the aircraft engine are organic flaws, various types of blades and integral leaf discs.
Machine processing
There are three types of aircraft engine casings, one is a split ring structure, the other is a monolithic ring structure, and the other is a profiled casing. The casing material is a high-temperature resistant titanium alloy material that is difficult to process. The casing is also a thin-walled, weakly rigid structure with complex profiles, high precision requirements and high processing difficulty. The casing is a large part, and a helicopter with a thrust of 15,000 kg has a diameter of φ800 mm. The large fan size of the large aircraft is φ1823.5mmx546mm, and the thinnest part is 3mm thick. Therefore, machine processing requires medium and large-scale multi-function, high-precision CNC machine tools. For example, CNC vertical lathes and precision CNC vertical lathes with a diameter of φ2000mm; gantry-type five-axis linkage machining centers with a working table size of 2400mm×5000mm need to have dual-station, on-line measurement and simulation functions, and the tool magazine has a capacity of 60 knives. The CNC system has advanced programming functions, and the gantry type CNC boring and milling machine of 3000mm×5000mm is used.
Blade processing
The blade material of the aero-engine is a high-temperature resistant titanium alloy material, which requires a five-axis linkage machining center and a five-axis high-speed gantry milling machine to process the blade surface. The processing of the leaf root hoe requires the use of broaching and slow-feeding to the powerful grinding machine, and it is hoped that the powerful grinding machine has the function of changing the grinding wheel and the wheel dressing wheel. It also needs online measurement, program adjustment and automatic compensation.
Electrolytic processing of the blade surface can greatly improve the processing efficiency, and it needs to be polished by a numerical control six-axis belt polishing device. It is desirable to have a blade surface inspection device.
Large wide-chord hollow fan blades with wide chord, hollow and damped boss structure, diameter φ1600mm or more, fan tip speed up to 457m/s, lighter weight titanium alloy or resin-based material, five coordinates are required to manufacture such blades Blade milling machine; automatic polishing machine; combined sealing and diffusion bonding and superplastic forming equipment.
The blade has a lot of holes for cooling, and it is better to punch holes with electric pulses than to use laser drilling (laser drilling has a hardened layer), but now, the electromachining punching machine does not have a shallow hole display, and the operation is difficult. I hope to solve this problem and show the depth of the punch. Nickel-based single crystal turbine blades with high temperature resistance of 1100 °C have good high temperature strength and comprehensive performance. There are many cooling film holes with diameters of φ0.3~φ0.4mm on the blades. Single crystal melting furnace, ceramic core roasting furnace, core making machine, grinding center, numerical control jog grinding machine and electro-hydraulic beam flow equipment and small hole processing unit for blade hole making.
Whole leaf disc processing
The integral leaf disc is a thin-walled disc type with a bladed groove on the circumference of the leaf disc. Straight grooves can be processed by broaching and grinding. The circular groove can be machined by milling and forming, but the detection of the circular groove is difficult. The processing of the leaf ring and the leaf disc requires a CNC sleeper and a precision CNC vertical car. The processing machine tool is required to have good rigidity and high positioning accuracy, and the positioning accuracy is about 2 to 3 μm. The blade portion of the integral leaf disc can be processed by a five-axis high-speed machining center, and can also be processed by EDM. The diameter of heavy-duty gas turbine blades can reach 2000-3000mm, which requires high-speed grinding machines with a grinding wheel speed of 100m/s or more.
Previous Next
Phlicflow, a global control valve manufacturer and exporter, relys on our decades' know-how, we have the best control valves used in Ahu HAVC unit. We focus on the context of application, provide a professional selection advice, the best quality and the best price.
Control Valve, ahu havc, ahu havc unit
Zhejiang Philic Fluid Control Co.,LTD , https://www.philicflow.com