The blade surface performance and its robotic machining

Abstract

Through numerical calculations, it could be found that when the blade surface quality reaches a certain level, the surface quality of the blade was continuously improved, and the guarantee effect on its performance would be weakened. Under this circumstance, continuing to improve the surface quality of the blade had no positive effect on the performance of the blade. Studies had shown that when the blade surface equivalent grit roughness Ks reaches 4.96 (about R a = 0.8 µm), the blade performance was close to the smooth surface of the blade, and no further processing was required to improve the surface roughness. When the surface equivalent grit Ks was greater than 4.96 µm, the surface roughness had a great influence on the blade performance. When Ks was larger than 40 µm, the negative effect is significantly increased. For the different characteristics of the blade and different processing conditions, four kinds of robot-based blade surface grinding schemes were proposed, of which the core content was the robot layout. Based on the robot group’s fitting to the spatial surface and the path planning, the experimental verification was carried out.

Automatic Aluminum Alloy Surface Grinding Trajectory Planning of Industrial Robot Based on Weld Seam Recognition and Positioning

“…The Archimedean spiral lies on a plane and can be parameterized with two parameters r and θ, as in Formulas (11) and (12). According to Equation (11), given a constant θ = θ i (i = 1 ∼ n), a set of parametric curves, which are circles, can be obtained. Given a constant r = r i (i = 1 ∼ n), another set of parametric curves, which are radial, can be obtained.…”

“…In addition, Zhang [10] proposed a system for robots to automatically grind workpieces conveyed on abrasive belts, enabling robots to grind workpieces without collisions, and Qiu [11] proposed four grinding systems based on robot-based blade surface grinding schemes. Xie [12] proposed an automatic grinding system for metal products, using a force-controlled grinding robot instead of manually grinding metal.…”

Experimental and numerical study on surface generated mechanism of robotic belt grinding process considering the dynamic deformation of elastic contact wheel

“…The threshold exceeded surface roughness causes air turbulent at the blade edge, resulting in the reduction of blade dynamic performance, and power losses of engine. Enormous surface roughness may cause cracks or even fracture due to the stress concentration effects, and ruined the performances in high temperature service conditions [3][4][5]. At present, the universal method for predicting the rigidly grinding surface roughness is based on the undeformed chip thickness model.…”