發(fā)布時(shí)間：2019-03-31 09:46

【摘要】：檢驗(yàn)基于三元切削力機(jī)理模型的平底立銑刀尺寸效應(yīng),并探索一種簡便的切削力系數(shù)估算方法。論證了在切削厚度較小時(shí)可忽略刀具螺旋角對(duì)切削力的影響,據(jù)此構(gòu)建平底立銑刀單個(gè)刀齒的三元切削力簡化模型�；谠撃Ｐ�,用各齒徑向跳動(dòng)量補(bǔ)償瞬時(shí)切削厚度,用切削試驗(yàn)數(shù)據(jù)擬合各齒切削力峰值與切削深度及瞬時(shí)切削厚度的線性方程式,發(fā)現(xiàn)各擬合式的確定系數(shù)總體上接近1,表明同一刀齒的切削力系數(shù)大體為常數(shù),這意味著平底立銑刀的尺寸效應(yīng)不顯著。據(jù)此采用刀具的平均切削力峰值估算切削力系數(shù),該方法不用考慮刀具偏心,且計(jì)算比較簡便,模擬得到的切削力波形與實(shí)測波形相近,表明估算方法比較有效。研究結(jié)果可供銑削力尺寸效應(yīng)機(jī)理研究及平底立銑刀應(yīng)用領(lǐng)域參考。
[Abstract]:The size effect of flat-bottom end milling cutter based on the three-dimensional cutting force mechanism model is tested and a simple method for estimating the cutting force coefficient is explored. The influence of cutter helix angle on cutting force can be neglected when the cutting thickness is small. Based on this, a simplified model of three-dimensional cutting force for a single cutter tooth of flat-bottom end milling cutter is established. Based on this model, the instantaneous cutting thickness is compensated by the radial jump momentum of each tooth. The linear equations between the peak cutting force and the cutting depth and the instantaneous cutting thickness of each tooth are fitted with the cutting test data. It is found that the determination coefficients of each fit are generally close to 1. It is shown that the cutting force coefficient of the same cutter is generally constant, which means that the size effect of the flat end milling cutter is not significant. Based on this, the average cutting force peak value of the tool is used to estimate the cutting force coefficient. This method does not need to consider the cutter eccentricity, and the calculation is simple. The simulated cutting force waveform is similar to the measured one, which shows that the method is effective. The results can be used as reference for the study of the mechanism of milling force size effect and the application of flat-bottom end-milling cutter.
【作者單位】： 廣東海洋大學(xué)工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51375099,51375100)
【分類號(hào)】：TG714

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