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CFRP砂轮高速外圆磨削稳定性分析

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为分析不同影响因素对CFRP砂轮高速外圆磨削稳定性的影响,采用铁木辛柯梁理论对具有阶梯特征的工件进行动力学分析,结合锤击试验测得砂轮动态特性,对高速磨削过程中的砂轮-工件两自由度系统进行了磨削稳定性分析.在对阶梯工件进行动力学分析的过程中,发现阶梯特征对于动态特性的影响较小,误差小于2%.在稳定性分析中发现,不同的砂轮转速和不同的工件磨削位置均会影响磨削稳定性.磨削位置越靠近工件中心,工件刚度越弱,磨削稳定性降低易诱发颤振;而在靠近顶尖支撑的位置,由于工件刚度增强,该位置的磨削稳定性将同时受到工件和砂轮的动力学性能的影响.通过磨削试验验证了分析方法的有效性,试验结果表明,工件磨削位置的刚度差异将会影响加工表面质量,由磨削失稳导致的粗糙度增幅可达51.6%.
Stability Analysis of High Speed Grinding Process of CFRP Wheel
In order to analyze the influence of different elements on the stability of high speed cylindrical grinding process with CFRP grinding wheel,the Timoshenko beam theory was used to conduct the dynamic analysis on the stepped workpiece.Combined with the dynamic characteristics of grinding wheel measured by impact test,the grinding stability analysis of the two-degree-of-freedom system between grinding wheel and workpiece in high speed grinding process was conducted.During the dynamic analysis of the stepped workpiece,it was found that the stepped feature of workpiece has a small influence on the dynamic characteristics whose error is lower than 2%.In the grinding stability analysis,it was observed that the grinding stability can be affected by both the speed difference of grinding wheel and the difference of cutting position.The closer the grinding position is to the center of workpiece,the lower the grinding stability is and it is easy to induce chatter.As for the position near the center support,the grinding stability will be influenced by the dynamic performance of workpiece and grinding wheel at the same time as the increase of workpiece stiffness.The effectiveness of the proposed analytical method has been proved by the grinding experiment.The experiment results also indicate that the stiffness difference of the workpiece in different grinding positions can affect the surface quality,and the increase of workpiece surface roughness can reach 51.6%due to grinding instability.

CFRP grinding wheelHigh speed grindingStepped workpieceTimoshenko beam theoryGrinding stability analysis

秦鹏、冯伟、刘斐、张霖、杨淮文、曹乐、张国建

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河南工业大学,郑州 450001

河南省超硬磨料磨削装备重点实验室,郑州 450001

白鸽磨料磨具有限公司,郑州 450199

CFRP砂轮 高速磨削 阶梯工件 铁木辛柯梁理论 磨削稳定性分析

河南省科技攻关计划河南省超硬磨料磨削装备重点实验室开放基金河南省超硬磨料磨削装备重点实验室开放基金河南工业大学高层次人才科研启动基金国家自然科学基金-河南省联合基金重点项目河南省高等学校重点科研项目

232102220094JDKFJJ2022002JDKFJJ20230112023BS042U160425420A460007

2024

10.16080/j.issn1671-833x.2024.08.076

航空制造技术
北京航空制造工程研究所

航空制造技术

CSTPCD北大核心
影响因子：0.403
ISSN：1671-833X
年,卷(期)：2024.67(8)
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