| 摘要: |
| 基于铝合金材料切削的现状和需求，针对单一织构刀具存在的抗黏减摩性能不足的问题，将不同织构应用于刀-屑接触区域，提出刀具前刀面分区异构的思想。利用皮秒激光在刀具黏结区与滑移区分别加工凹坑和沟槽，并调整沟槽的取向(平行 / 垂直于主切削刃)，得到上下型(SXDV 和 SXDP)和左右型(ZYDV 和 ZYDP)四种复合织构刀具。对 6061 铝合金进行湿切削试验，研究不同区域内添加不同织构对刀-屑接触表面摩擦状态的影响。研究结果表明，对比无织构和单一织构刀具， ZYDP 复合织构刀具展现了更好的切削性能。具体表现如下：与无织构刀具相比，ZYDP 刀具的主切削力降低 30.7%，刀面黏结面积减少 63.9%，切屑卷曲半径减少 27.4%。合理的复合织构方案可以明显改善刀具切削过程中的黏结磨损问题，延长了刀具寿命。复合织构方案的提出以及相应的激光加工过程可为织构刀具的设计及实际应用提供新思路。 |
| 关键词: 复合织构 铝合金 刀具磨损 切屑形貌 |
| DOI：10.11933/j.issn.1007-9289.20211118004 |
| 分类号:TH117;TN249 |
| 基金项目:国家自然科学基金(52075225)； 2020 年度镇江市科技创新资金(ZD2020004)资助项目 |
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| Performance of Hybrid Textured Tools in Cutting Aluminum Alloy |
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ZHOU Yun, HE Yuyang, YANG Zetan, YANG Jie, FU Yonghong
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College of Mechanical Engineering, Jiangsu University, Zhenjiang 212013 , China
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| Abstract: |
| Based on the current situation and demand of cutting aluminum alloy, a new idea of partition isomerization of tool on the rake face by applying varied textures to the tool-chip contact interface is proposed to solve the problems of insufficient anti-adhesion and friction reduction of the single-textured tool. Pits and grooves with varied orientation (parallel / perpendicular to the main cutting edge) are fabricated on the sticking and sliding regions by utilizing the picosecond laser, respectively. Finally, four kinds of hybrid textured tools characterized by up-down (SXDV and SXDP)and left-right (ZYDV and ZYDP) texture distribution are obtained. Wet cutting experiments of 6061 aluminum alloy are carried out to study the effect of different textures in different regions on the friction state of tool-chip contact surface. Results show that compared non-textured and single textured tools, ZYDP tool exhibits a better cutting performance. The specific performance is as follows: compared with non-textured tool, the main cutting force of ZYDP tool is reduced by 30.7%, adhesion area on the tool surface is reduced by 63.9%, and the chip curling radius is reduced by 27.4%. A reasonable hybrid texture scheme can obviously improve the adhesive wear and prolong the tool life in the cutting process. The proposal of hybrid texture scheme and the corresponding laser machining process provide a new idea for the design and practical application of textured tools. |
| Key words: hybrid texture aluminum alloy tool wear chip morphology |
