No abstract

Unity Three-Dimensiongal technology is used to develop a 3D virtual training system platform for hydraulic and pneumatic transmission circuits, which realizes the simulation of basic hydraulic and pneumatic transmission circuits. The Physically Based Redering process is applied to map the 3D model created by 3DMax software, and the Unity 3D virtual scene technology is used to create the experimental 3D virtual scene and drive the model interactively. The finite state machine design pattern is applied to User Interface management, model selection and scene switching. The Model-View-Controller framework is used to determine the correctness of the linkage, and the mediator pattern is used to control the interaction of the components using buttons. The practical application shows that the system can show the working principle of hydraulics and pneumatics well, and the students can build and interact with the basic circuit to achieve the effect similar to the actual experiment.

High-temperature alloy profile grinding is mainly used in the machining of aero-engine turbine structural parts, which require high surface quality and high machining efficiency. However, the process ability of machining high-temperature alloys is poor. For this reason, this paper conducts experimental research on the surface profile grinding process of high-temperature alloys to meet the surface quality and machining efficiency requirements of high-temperature alloy structural parts. Using a precision profile grinding machine, WA and SG grinding wheels are selected for profile grinding tests on three types of workpieces with curved surfaces: flat, convex, and concave. Each shape of the workpiece was shaped-ground using WA and SG grinding wheels separately. The orthogonal experimental method was used to perform profile grinding by changing three factors: grinding wheel speed, feed, and backlash. The surface roughness after grinding was measured and compared, and the most suitable process parameters for grinding three curved workpieces with WA and SG grinding wheels were obtained by comparing the surface quality and machining efficiency. The grinding strategy is also given for surface roughness and machining efficiency. It provides a basis for the improvement of the quality and efficiency of high-temperature alloy forming and grinding.