Abstract: Laser processing technology was used to generate raindrop surface texture on the flank of keyway broach. Broaching load test of 45# steel was carried out. A fluid dynamics model was established to analyze the lubrication oil flow characteristics and the lubricating mechanism of micro-textured broach by the fluid dynamics analysis method. Research shows that micro-textured broach can not only reduce the broach-ing load and tool wear, but also improve the response and broaching performance. Meanwhile, flow resistance of the lubricating fluid was effectively reduced by raindrop micro-texture, which leads to an increase in flow velocity of the lubricating fluid, and the lubricant could took away more heat in unit time, so that broaching temperature was effectively reduced. The textured broach can greatly improve cutting efficiency and machining accuracy. The micro-textured groove can also be used to store micro lubricating fluid, to be a supplement under the state of micro-lubrication.

Key words: surface texture, raindrop, bionics, broaching force, anti-friction