Optimization Of Microtexture Carbide And Experimental Study Of Orthogonal Cutting

Aluminum alloy has been used most widely in industrial as structure materials, A6061 is one of the typical material of alloy, which has good mechanical properties, thermal processing performance, corrosion resistance, weldability and machinability. A6061 has been used in the manufacture of truck, vessel, tramcar, fixture, machinery parts, precision machining, etc. At the same time, aluminum alloy is a typical material difficult to machine, in the cutting process of carbide cutting tool, the chip is easy to adhere to the surface of the tool, causing serious tool wear and reducing the tool cutting performance. Some scholars proved that the texture with certain size and arrangement has been prepared on the surface of tool can improve the friction state between the tool and chip. This article processes the micro textured on the surface of cemented carbide(YG6) by diamond scratch method. First, through the observation of texture surface morphology under different parameters, the friction and wear properties of linear textures with different parameters were compared to get the optimal parameters. Finally the different parameters textures were applied to tool’s surface. By comparing the cutting performance of the tool with/without textured surface, the effect of the texture with different parameters on the carbide tool was analyzed The main research content of this article is as follows:1. Surface micro-textured cemented carbides were fabricated by using diamond scratching method. By selecting different scratch load and textural spacing parameters, the micro-texture has different groove width and texture area occupation ratio by different scratching loads and texture space. The feasibility parameters of processing on cemented carbide’s surface were demonstrated by the surface’s morphology through atomic force microscope(AFM).2 By friction and wear experiment on the cemented carbide surface of different texture parameters. Keeping positive pressure constant and after the same time of friction and wear experiment, the coefficient of friction was obtained. The surface morphology was observed by scanning electron microscopy(SEM) to get the optimal processing parameters.3. Orthogonal dry cutting experiment was conducted on the aluminum alloy by textured tools with different parameter. Using three-dimensional dynamometer collected cutting force and using high speed camera took the photos of chip formation process. The cutting force, tool wear morphology, chip deformation had been measured. The cutting performance and cutting mechanism of cutting tool has been analyzed.