CAJ | 학술논문

以螺旋铣孔工艺时域解析切削力建模、时域与频域切削过程动力学建模、切削颤振及切削稳定性建模为基础，研究了螺旋铣孔的切削参数工艺规划模型和方法。切削力模型同时考虑了刀具周向进给和轴向进给，沿刀具螺旋进给方向综合了侧刃和底刃的瞬时受力特性；动力学模型中同时包含了主轴自转和螺旋进给两种周期对系统动力学特性的影响，并分别建立了轴向切削稳定域和径向切削稳定域的预测模型，求解了相关工艺条件下的切削稳定域叶瓣图。在切削力和动力学模型基础之上，研究了包括轴向切削深度、径向切削深度、主轴转速、周向进给率、轴向进给率等切削工艺参数的多目标工艺参数规划方法。最后通过试验对所规划的工艺参数进行了验证，试验过程中未出现颤振现象，表面粗糙度、圆度、圆柱度可以达到镗孔工艺的加工精度。
이라선선공공예시역해석절삭력건모、시역여빈역절삭과정동역학건모、절삭전진급절삭은정성건모위기출，연구료라선선공적절삭삼수공예규화모형화방법。절삭력모형동시고필료도구주향진급화축향진급，연도구라선진급방향종합료측인화저인적순시수력특성；동역학모형중동시포함료주축자전화라선진급량충주기대계통동역학특성적영향，병분별건립료축향절삭은정역화경향절삭은정역적예측모형，구해료상관공예조건하적절삭은정역협판도。재절삭력화동역학모형기출지상，연구료포괄축향절삭심도、경향절삭심도、주축전속、주향진급솔、축향진급솔등절삭공예삼수적다목표공예삼수규화방법。최후통과시험대소규화적공예삼수진행료험증，시험과정중미출현전진현상，표면조조도、원도、원주도가이체도당공공예적가공정도。
Helical milling operations machining process parameters planning approach were pro‐posed based on analytical time domain cutting forces models and time and frequency domain dynamics models of the operations .The cutting forces both on the side cutting edges and on the bottom cutting edges along the helical feed path were defined by considering the circumferential feed motion and the axial feed motion of the tool .The dual periodicity which was caused by the spindle rotation ,as well as the period of the helical cutting fool feed was included .Both the critical axial cutting depth and the critical radial cutting depth were solved .The cutting force model and dynamics model allowed the planning of machining process parameters including axial cutting depth ,radial cutting depth ,circum‐ferential feed rate ,axial feed rate and spindle rotation velocity in the chatter free zone during helical milling .Experiments were also performed in order to verify the planned machining process parameters for helical milling .No chatter occurred during the experiments .The accuracy and precision of the ma‐chined surface ,including surface roughness ,roundness and cylindricity ,are equivalent to the boring process .