刀具幾何參數(shù)對縱扭超聲振動銑削性能的影響
胡春林 2024/12/15 18:46:51
淮安生物工程高等職業(yè)學校,機電工程系,江蘇淮安 223232
摘要:高強度鋼由于硬度較高在切削過程中存在一定的困難,進而影響加工質量。普通的切削技術難以滿足要求,引入超聲振動輔助是目前常用的技術手段。以高強度鋼30CrNi2MoVA為測試對象,實驗分析了縱扭超聲振動輔助下銑削參數(shù)優(yōu)化及殘余應力分析。研究結果表明:確定最優(yōu)的參數(shù)匹配:后角10°、前角2°、螺旋角40°、切刃半徑0.01mm。從刀具幾何參數(shù)對殘余應力影響程度從大到小依次:螺旋角,切刃半徑的影響程度,前角與后角。該研究有助于提高銑削加工效率,為提高銑削加工質量具有很好的實際指導意義。
關鍵詞:銑削,縱扭,超聲振動,參數(shù)優(yōu)化,殘余應力
中圖分類號:TH137
Milling parameter optimization by longitudinal torsional ultrasonic vibration
Hu Chunlin
Department of Mechanical and Electrical Engineering, Huaian Higher Vocational School of Biological Engineering, Huaian 223232, China
Abstract: High strength steel has some difficulties in the cutting process because of its high hardness, which affects the processing quality. Ordinary cutting technology is difficult to meet the requirements, the introduction of ultrasonic vibration is a common technical means. The optimization of milling parameters and the analysis of residual stress with the aid of ultrasonic vibration of longitudinal-torsional high strength steel 30CrNi2MoVA were analyzed experimentally. The results show that the optimal parameter matching is determined: back Angle 10°, front Angle 2°, spiral Angle 40°, cutting edge radius 0.01mm. The degree of influence of tool geometry parameters on residual stress is from large to small: helix Angle, cutting edge radius, front Angle and back Angle. The research is helpful to improve milling efficiency and has a good practical guiding significance for improving milling quality.
Key words: milling, longitudinal torsion, ultrasonic vibration, parameter optimization, residual stress
0 引言
在高強度鋼加工過程中,由于會產(chǎn)生很高的切削溫度、發(fā)生大幅回彈變形,這對其尺寸控制精度造成了不利影響,并且在還會在加工過程中產(chǎn)生明顯的表面殘余拉應力,從而造成高強度鋼零件使用壽命的縮短[1-3]。
針對殘余應力控制機制以及減小殘余應力方面,目前已有許多學者開展了相關研究工作,并取得了一定的研究成果,為增強零部件抗疲勞能力提供可靠支持[4-5]。相關方面的研究吸引了很多的援救學者,也取得了一定的研究成果[6]。戴文順等[7]建立了高進給銑削34CrNi3Mo高強度鋼模型,采用正交試驗法設計研究方案,依據(jù)多元回歸分析法得到切削溫度,有利于避免切削溫度的大幅度增加。王書利等[8]建立高強度鋼切削力模型,通過正交研究刀具角度對切削力的影響,刃口半徑對主切削力影響最大,前角對進給抗力影響最大(未完,下一頁)
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