With the rapid development of China's aerospace industry and the increasing number of tasks year by year, the traditional processing methods have been unable to meet the needs of aerospace products with multiple varieties and small batches. It is urgent to find a low-cost and efficient production method. In view of this situation, this paper puts forward a design idea of an intelligent machining unit for aerospace electronics structural parts. Centering on improving equipment startup rate, reducing personnel demand, and improving quality consistency. Following the overall idea of "unified the type of processing method, complete some work offline, improve the flexibility of machining and intelligent decision-making", taking the built intelligent FMC (Flexible Manufacturing Cell) as an example, it realizes continuous and unattended automatic processing of products, Under the premise of ensuring quality, the production efficiency has been improved and good practical results have been achieved.
In this paper, based on the analysis of the machining method and equipment status of SIC material optical elements, the special grinding method and grinding tool for belt grinding are explored, by means of a set of mechanism with driving, contacting and tensioning functions, it can be applied to the precision machining technology of flexible grinding on optical elements. A robotic belt flexible grinding system is established by using this technology. The precision grinding experiments of SIC specimens are carried out, and the micro-morphology and sub-surface damage of the specimens are analyzed, a whole set of process method is optimized to meet the needs of material processing. To optimize the processing of flexible machining paths through off-line programming and 3D simulation of typical optical automation, self-planning an optimal processing path from the starting state to the target state.
Aiming at the difficulty in controlling the optical alignment machining accuracy of high-precision thin-walled opto-mechanical parts, a control method based on accurate calculation of clamping force and non-contact online detection of clamping deformation monitoring was proposed. Through theoretical calculation, the clamping force values under three working conditions of centering processing are obtained, and a real-time detection system for clamping deformation is built. Measures such as establishing a high precision-connection surface and accurately adjusting the screw tightening torque of the clamping process are adopted to control the clamping deformation of the opto-mechanical parts and estimate the machining accuracy of the opto-mechanical components online. Experiments show that this method can realize the design accuracy index of opto-mechanical parts and provide reference for solving the similar problems.
Selected Laser Melting (SLM) has the advantage of high flexibility and can realize near net shape of high-precision complex components, which provides a new technological way to design and manufacture metal parts. To apply the advantages of SLM more widely in the design and forming of aerospace components, taking one connecting part of the recovery subsystem as an example, it realizes the structural optimization design based on SLM, carries out the mechanical simulation analysis, and completes the forming and processing. The results show that on the premise of meeting the application requirements, the weight of the optimized parts can be reduced by 24.54% and the overall manufacturing cycle can be saved by 41.46%, which provides an effective reference example for the process optimization design of the similar aerospace structural parts formed by selected laser melting technology.
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