组合机床与自动化加工技术
組閤機床與自動化加工技術
조합궤상여자동화가공기술
Modular Machine Tool & Automatic Manufacturing Technique
2015年
10期
12-14,18
,共4页
铸型加工%铣刀%动态特性%长径比
鑄型加工%鐉刀%動態特性%長徑比
주형가공%선도%동태특성%장경비
casting mould machining%end mill%dynamic characteristics%length-diameter ratio
针对铸型深腔加工的要求,采用有限元法研究了大长径比专用铸型铣销刀具的动态特性.建立了专用刀具的有限元参数化模型,计算了不同长径比专用刀具的固有频率和振型,分析了其固有频率随刀具直径和悬伸量变化的规律.基于铸型加工的动态切削力测试结果,计算了专用刀具的切削动力学响应,分析了专用刀具加工铸型时刀具直径和悬伸量对应力和变形的影响.为铸型加工大长径比刀具的设计提供了动力学分析依据.
針對鑄型深腔加工的要求,採用有限元法研究瞭大長徑比專用鑄型鐉銷刀具的動態特性.建立瞭專用刀具的有限元參數化模型,計算瞭不同長徑比專用刀具的固有頻率和振型,分析瞭其固有頻率隨刀具直徑和懸伸量變化的規律.基于鑄型加工的動態切削力測試結果,計算瞭專用刀具的切削動力學響應,分析瞭專用刀具加工鑄型時刀具直徑和懸伸量對應力和變形的影響.為鑄型加工大長徑比刀具的設計提供瞭動力學分析依據.
침대주형심강가공적요구,채용유한원법연구료대장경비전용주형선소도구적동태특성.건립료전용도구적유한원삼수화모형,계산료불동장경비전용도구적고유빈솔화진형,분석료기고유빈솔수도구직경화현신량변화적규률.기우주형가공적동태절삭력측시결과,계산료전용도구적절삭동역학향응,분석료전용도구가공주형시도구직경화현신량대응력화변형적영향.위주형가공대장경비도구적설계제공료동역학분석의거.
Considering the deep cavity machining of sand mould,the dynamic characteristics of cpecial cut-ter with large length-diameter ratio are studied based on finit element method.Firstly,the FEM parameter-ized models are build,then the natural frequency and mode shape of special cutter with different length-di-ameter ratio are calculated,and the chang of natural frequency with the different diameter and extended length are studied.According to the dynamic cutting force test result of casting mould machining,the dy-namic response to the special cutter machining are calculated and analyzed,which areeffected by diameter and extended length of the special cutter.The analysis conclusion provide the basis for the designationlarge length-diameter ratio special cutter.
