In this study, we investigated thermal influence on surface layer of CFRP in grinding with heat conduction analysis using grinding temperature at wheel contact area on dry and wet condition. Moreover, the thermal affected layer was analyzed through an experiment to examine the temperature of glass transition and thermal decomposition of the matrix resin that composes the CFRP used in this study. The influence of thermal effect on grinding of CFRP was verified based on observation of ground surface finish after grinding using SEM and the measurement of surface roughness. From the measurement result of DSC (Differential Scanning Calorimetry)，TG-DTA (Thermogravimetry-Differential Thermal Analysis), It was found that the thermal affected layer of CFRP includes a layer in which the matrix resin is changed in quality by exceeding the glass transition temperature and a layer in which the matrix resin is thermally decomposed by exceeding the thermal decomposition temperature. In addition, it was found that the surface roughness was significantly reduced if the thermal affected layer with thermal decomposition was generated. In each grinding atmosphere, it tended to increase of grinding temperature at wheel contact area with increasing in the setting depth of cut. In the case of dry grinding, grinding temperature at wheel contact area increased up to t thermal decomposition temperature of the matrix resin. However, in the case of the wet grinding, grinding temperature at wheel contact area did not increase until thermally decomposition temperature. From the result of simulation about thermal affected layer, influence of grinding heat increased with increasing in the setting depth of cut. Ultimately, the thermal affected layer with thermal decomposition was generated in dry grinding. Moreover, from the results of SEM observation, it was confirmed that the surface finish properties deteriorated significantly due to thermal decomposition of the matrix resin in the case of Δ = 400 μm in the setting depth of cut at fiber angle θ = 0°. On the other hand, it was confirmed that the micro damage of carbon fiber was occurred in wet grinding at each setting depth of cut.

在这项研究中，我们使用在干燥和湿润条件下砂轮接触区域的磨削温度进行热传导分析，研究了磨削过程中CFRP表面层的热影响。此外，通过实验分析了热影响层，以检查玻璃化转变温度和构成本研究中使用的CFRP的基体树脂的热分解。通过使用SEM观察研磨后的表面光洁度并测量表面粗糙度，验证了热效应对CFRP研磨的影响。根据DSC（差示扫描量热法），TG-DTA（热重分析-差热分析）的测量结果，发现CFRP的热影响层包括其中通过超过玻璃化转变温度而使基质树脂的质量改变的层和通过超过热分解温度而使基体树脂热分解的层。另外，发现如果产生具有热分解的热影响层，则表面粗糙度显着降低。在每种研磨气氛中，随着切削设定深度的增加，倾向于在砂轮接触区域处增加研磨温度。在干磨的情况下，砂轮接触区域的磨削温度升高至基体树脂的热分解温度。但是，在湿磨的情况下，直到热分解温度，砂轮接触区域的研磨温度才升高。从热影响层的模拟结果来看，随着切削深度的增加，磨削热的影响也随之增加。最终，在干磨中产生具有热分解的热影响层。此外，从SEM观察的结果可以确认，在纤维角度θ＝ 0°的切断设定深度中，Δ＝400μm的情况下，由于基体树脂的热分解，表面加工性显着降低。另一方面，证实了在每个设定切削深度的湿磨中都发生了碳纤维的微损伤。切削深度的增加会增加磨削热的影响。最终，在干磨中产生具有热分解的热影响层。此外，从SEM观察的结果可以确认，在纤维角度θ＝ 0°的切断设定深度中，Δ＝400μm的情况下，由于基体树脂的热分解，表面加工性显着降低。另一方面，证实了在每个设定切削深度的湿磨中都发生了碳纤维的微损伤。切削深度的增加会增加磨削热的影响。最终，在干磨中产生具有热分解的热影响层。此外，从SEM观察的结果可以确认，在纤维角度θ＝ 0°的切断设定深度中，Δ＝400μm的情况下，由于基体树脂的热分解，表面加工性显着降低。另一方面，证实了在每个设定切削深度的湿磨中都发生了碳纤维的微损伤。可以确认的是，在纤维角度θ＝ 0°的切削定型深度为Δ＝400μm的情况下，由于基体树脂的热分解，表面加工性显着降低。另一方面，证实了在每个设定切削深度的湿磨中都发生了碳纤维的微损伤。可以确认的是，在纤维角度θ＝ 0°的切削定型深度为Δ＝400μm的情况下，由于基体树脂的热分解，表面加工性显着降低。另一方面，证实了在每个设定切削深度的湿磨中都发生了碳纤维的微损伤。