In order to solve the problem that the sand blasting robot can complete the automatic/semi-automatic blasting in the blasting workshop according to the geometry of the blasting workpiece. This paper proposes a kind of...
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ISBN:
(纸本)9781728116976
In order to solve the problem that the sand blasting robot can complete the automatic/semi-automatic blasting in the blasting workshop according to the geometry of the blasting workpiece. This paper proposes a kind of adapt to the traversal of a variety of sandblasting workpieces and path planning methods for obstacle avoidance based on the fast extended random tree (RRT) algorithm. In particular, an improved method for trajectory planning for obstacle avoidance is proposed. Firstly, the sandblasting workpieces are divided into regions and the traversing trajectory planning of the sandblasting area according to the large-scale and diversity characteristics of sandblasting workpieces. Then, the improved RRT algorithm is used to plan the obstacle avoidance trajectory of the simulated traversal trajectory. Through the simulation verification of the method, it is possible to realize a comprehensive, safe, fast and accurate path planning for different blasting workpieces and with faster processing speed than traditional algorithms.
Pneumatic sandblasting is an efficient surface treatment technology. To investigate the impact of pneumatic sandblasting nozzle structure dimensions on the resulting flow field characteristics and sandblasting effe...
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ISBN:
(纸本)9798350373141;9798350373158
Pneumatic sandblasting is an efficient surface treatment technology. To investigate the impact of pneumatic sandblasting nozzle structure dimensions on the resulting flow field characteristics and sandblasting effectiveness, this study initially establishes a two-phase flow model based on the Euler-Lagrange method using Computational Fluid Dynamics (CFD) techniques. The internal flow field inside the nozzle and the movement characteristics of solid particles, such as trajectory and velocity, are simulated and analyzed by Fluent software. Then, a comparative analysis is conducted on the variation in flow field pressure and velocity distribution under different shrinkage angles and particle diameters. The results indicate that the ejection velocity of particles accelerated by the nozzle reduces as the particle diameter increases. The nozzle with a shrinkage angle of 30 degrees displays the most stable variation in gas velocity and pressure, with a smaller interval of discreet distribution in particle flow fields. Moreover, a higher proportion of high-speed particles is observed, leading to an enhanced pneumatic sandblasting effect. The research results provide a basis for the design of high-efficiency nozzle for pneumatic sandblasting and the selection of optimal process parameters.
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