A Bionic Design Method for Micro-textured Turning Tool with Depth Gradient Variation

Abstract

The invention discloses a bionic design method for a microtexture turning tool with a gradient changed depth. The method comprises the following steps of using a non-contact laser scanner to acquire bamboo rat incisor point cloud data, reconstructing a three-dimensional incisor model, and extracting crescent-shaped depth data of incisors; aiming at dry turning of aluminum alloy 7075 by using a hard alloy YG6A tool, when the distance of 10 microns from texture to a cutting edge, a groove depth of 7 microns, a groove width of 12 microns, and the groove space of 30 microns are determined by usingfinite element simulation and experiments during a turning process, achieving the best turning characteristic by a texture tool; and in combination with temperature distribution of the front tool plane of the turning tool, using the crescent depth data value to bionically design the microtexture turning tool with the gradient changed depth. When the microtexture with gradient changed depth is close to the cutting edge, the texture depth is small, and the texture depth is firstly increased and then reduced along with the texture that keeping away from the cutting edge. The method provided by the invention reserves the characteristic that the texture is reduced in cutting force of the tool, also improves the structural strength of the tool, and has the advantages of prolonging the service life of the tool and improving economic value of the tool.

Description

technical field [0001] The invention belongs to the technical field of engineering bionics, and in particular relates to a bionic design method for a turning tool with a depth gradient change micro-texture. Background technique [0002] In the process of aerospace, mechanical automation manufacturing and agricultural construction, aluminum alloys are widely used as traditional non-ferrous metal structural materials. Aluminum alloy has excellent physical properties, not only low density, but also higher strength than ordinary high-quality steel. In addition, aluminum alloy has good ductility, low strength and hardness, and is often used to make various stamping parts. Thanks to the good machinability of aluminum alloy, aluminum alloy is an easier-to-process metal material, suitable for high-speed cutting. However, during the cutting process, the plasticity of aluminum alloy increases with the increase of cutting temperature. Under high temperature and high pressure, an alu...

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Problems solved by technology

Tatsuya Sugihara, Feng Xiuting and others used the single factor method to study the influence of groove depth and groove width on the cutting performance of the tool; but there is no report on the influence of multiple variables on the cutting performance of the tool

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