北京交通大学学报
北京交通大學學報
북경교통대학학보
JOURNAL OF NORTHERN JIAOTONG UNIVERSITY
2010年
1期
154-157
,共4页
五坐标%端铣加工%快速进给铣刀%后跟角%刀位计算
五坐標%耑鐉加工%快速進給鐉刀%後跟角%刀位計算
오좌표%단선가공%쾌속진급선도%후근각%도위계산
five-axis%end milling%high feed cutter%tilt angle%tool position calculation
对快速进给铣刀五坐标端铣加工的基本原理进行了研究,指出使用快速进给铣刀进行端铣加工时,刀触点的法矢量不再像环形刀一样通过刀片的几何中心,由此求出了刀具有效切削半径.然后将快速进给铣刀刀具模型简化为半径等于有效切削半径的端铣刀,得到了后跟角的计算公式,并深入研究了后跟角的临界情况,严格推导出了由刀触点生成刀位点的计算公式.此外,对快速进给铣刀端铣加工中的误差进行了研究,得到了走刀步长与直线逼近误差的关系式.
對快速進給鐉刀五坐標耑鐉加工的基本原理進行瞭研究,指齣使用快速進給鐉刀進行耑鐉加工時,刀觸點的法矢量不再像環形刀一樣通過刀片的幾何中心,由此求齣瞭刀具有效切削半徑.然後將快速進給鐉刀刀具模型簡化為半徑等于有效切削半徑的耑鐉刀,得到瞭後跟角的計算公式,併深入研究瞭後跟角的臨界情況,嚴格推導齣瞭由刀觸點生成刀位點的計算公式.此外,對快速進給鐉刀耑鐉加工中的誤差進行瞭研究,得到瞭走刀步長與直線逼近誤差的關繫式.
대쾌속진급선도오좌표단선가공적기본원리진행료연구,지출사용쾌속진급선도진행단선가공시,도촉점적법시량불재상배형도일양통과도편적궤하중심,유차구출료도구유효절삭반경.연후장쾌속진급선도도구모형간화위반경등우유효절삭반경적단선도,득도료후근각적계산공식,병심입연구료후근각적림계정황,엄격추도출료유도촉점생성도위점적계산공식.차외,대쾌속진급선도단선가공중적오차진행료연구,득도료주도보장여직선핍근오차적관계식.
The fundamental of Five-axis End milling by High Feed Cutter was studied. It was found that the normal vector of cutting contact point did not pass through the blade's geometric center any more when High Feed Cutter was adopted for End milling, which was different from Torus end-mill. After the effective cutting radius was obtained, the mathematical model of High Feed Cutter was created. Based on this model, the tilt angle's formula was deduced, whose critical situation was also studied in detail; Finally, the precise formula for Tool Position Calculation was given. In addition, the error of Five-axis End milling by High Feed Cutter was explored too, and the relationship between feed length and linear approaching error was derived.