CAJ | 학술논문

超重型切削过程中，刀具的高温失效是硬质合金刀具破损的主要形式之一。首先，通过理论分析、切削仿真及数学模型进行切削热产生过程分析，并研究切削温度对硬质合金刀具变形抗力的影响；然后，进行切削温度及材料高温硬度测量实验，实验结果验证模型有效，硬质合金和工件材料试块的硬度在1000℃时分别下降了28％和60％左右；最后，从刀具几何结构优化设计和复合涂层技术两方面提出超重型切削专用硬质合金刀具抗高温性能的提效措施，在5组切削参数下进行刀具寿命对比实验，优化设计的XF8刀具寿命是YT15刀具的2～5倍。研究结果可以为重型高效切削刀具技术的研究及推广提供借鉴。
초중형절삭과정중，도구적고온실효시경질합금도구파손적주요형식지일。수선，통과이론분석、절삭방진급수학모형진행절삭열산생과정분석，병연구절삭온도대경질합금도구변형항력적영향；연후，진행절삭온도급재료고온경도측량실험，실험결과험증모형유효，경질합금화공건재료시괴적경도재1000℃시분별하강료28％화60％좌우；최후，종도구궤하결구우화설계화복합도층기술량방면제출초중형절삭전용경질합금도구항고온성능적제효조시，재5조절삭삼수하진행도구수명대비실험，우화설계적XF8도구수명시YT15도구적2～5배。연구결과가이위중형고효절삭도구기술적연구급추엄제공차감。
During the extra-heavy cutting process, high-temperature failure is one of the main breakage forms of a cemented carbide cutter.Firstly, the production process of a cutting heat was analyzed through theoretical analysis, cutting simulation and mathematical model, and the influence of cutting temperature on deformation resistance of the cemented carbide cutter was studied.Secondly, the measurement experiments of cutting temperature and high-temperature material hardness were carried out.The experimental results verified that the model was effective, and the hardness of cemented carbide and the test block of work piece material dropped by 28%and 60%at 1000℃, respectively.Finally, this paper puts forward solutions from two aspects of optimization design of geometry structure of cutter and composite coating technology for the high temperature resistance property of the extra-heavy cemented carbide cutter.The comparative experiments on cutter life were carried out on the basis of five groups of cutting pa-rameters.The life of optimized XF8 cutter was shown to be 2 to 5 times more than that of YT15.The research results provide a reference for the technology research and popularization of the heavy high-efficiency cutter.