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NX CAM 5 axis_machining_training_advanced_skill_and _demos
 

NX CAM 5 axis_machining_training_advanced_skill_and _demos

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    NX CAM 5 axis_machining_training_advanced_skill_and _demos NX CAM 5 axis_machining_training_advanced_skill_and _demos Presentation Transcript

    • Page 1© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software© 2007. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software多轴加工培训 Session 3 Prepared by: Paul Ji
    • Page 2© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM SoftwareLesson 5 刀轴控制方法1. 课程学习目的:本节课程主要学习使用多轴加工的刀轴控制方法。2. 课程学习目标:清晰的区分和使用各种多轴加工中用到的各种刀轴控制方法,如 Normal to Drive , Away fromPoint , Swarf Drive 。要点:1. 理解各种刀轴控制方法2. 合理使用 NX 提供的各种刀轴控制方法
    • Page 3© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software可变轴曲面加工的刀轴矢量控制可变轴曲面加工的刀轴矢量控制(1)(1) Away from pointAway from point(2) Toward point(2) Toward point(3) Away from line(3) Away from line(4) Toward line(4) Toward line(5)(5) Relative to vectorRelative to vector(6) Normal to Part(6) Normal to Part(7) Relative to Part(7) Relative to Part(8) 4-Axis Normal to Part(8) 4-Axis Normal to Part(9) 4-Axis Relative to Part(9) 4-Axis Relative to Part(10)(10) Dual 4-Axis on partDual 4-Axis on part(11)(11) InterpolateInterpolate(12)(12) Swarf to DriveSwarf to Drive(13)(13) Normal to DriveNormal to Drive(14)(14) Relative to DriveRelative to Drive(15)(15) 4-Axis Normal to Drive4-Axis Normal to Drive(16)(16) 4-Axis Relative to Drive4-Axis Relative to Drive(17)(17) Dual 4-Axis on DriveDual 4-Axis on Drive(18)(18) Optimized to DriveOptimized to Drive(19)(19) Same As Drive PathSame As Drive Path(20)(20) User FunctionUser Function
    • Page 4© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software从焦点向外发散(Away from Point)刀轴矢量方向为从焦点指向刀柄聚向焦点(Toward Point)刀轴矢量方向为从刀尖指向焦点..demoaway_from_point_tool_axis.prt..democavity_mill.prt
    • Page 5© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software从焦线向外发散(Away from Line)刀轴位于与焦线垂直的平面上 , 沿焦线方向刀轴相互平行Focal LineFocal line聚向焦线(Toward Line)刀轴方向起始于刀尖并指向焦线 , 沿焦线上任一位置的刀轴相互平行..demoaway_from_line_tool_axis.prt ..demotoward_line_tool_axis.prt
    • Page 6© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software相对于向量 (Relative Vector)Fixed Tool Axis Defined byEnd Point of an Existing LineFixed Tool Axis Defined byTwo PointsFixed Tool Axis Defined byTangent to CurveFixed Tool Axis Defined bySpherical Coordinates此选项允许相对于一给定矢量定义刀轴矢量包括导引角及侧倾角 侧倾角定义刀具向切削方向一侧倾斜的角度 正值 = 向右边倾斜 负值 = 向左边倾斜 导引角定义刀具在切削方向上向前或向后倾斜的角度 正值 = 向前倾斜 负值 = 向后倾斜 Fixed Tool AxisUsing I,J,K Values 0,0,1
    • Page 7© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software7与刀轴矢量控制相关的角度V1接触点法向矢量接触点沿切削方向的切向矢量V2P1P2侧倾角 导引角
    • Page 8© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software8刀轴矢量控制的几点注意事项 控制刀轴光顺变化 避免法矢突然变化 避免切削方向突然变化 若已指定导引角 (Lead Angle) 对于曲面驱动方法 建议使用 Zig, or Zig-Zag with Lift 切削方式 建议使用 Dual 4-axis Relative 刀轴方式用于 Zig-Zag 往复切削方式 对于边界驱动方法 对所有刀轨加倒圆 粗加工使用负的导引角将会产生钻削效果 , 应避免
    • Page 9© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software9确定理想刀具位置的元素在每一驱动点上 ,CAM 处理器始终维持刀尖位于投影向量上o 刀具沿投影矢量向下移动 , 并寻找合适的接触点. 在此接触点 , 刀轴矢量与面的法线矢量所成的角度满足导引角及侧倾角的要求o 如果发生过切 , 则尝试其它求解
    • Page 10© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software正交于工件 (Normal to Part)在零件上任意位置处的刀轴矢量正交于零件几何 .请留意 ! 建议不要使用零件几何作为刀轴控制几何 , 除非情况必须如此A_Snapple_5ax.prt..demoA_Snapple_5ax.prt
    • Page 11© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software相对于工件 (Relative to part)导引角及侧倾角导引角为 20 度 , 侧倾角为 0与正交于工件相似 , 但可以指定导引角及侧倾角
    • Page 12© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software四轴正交于工件 (4 Axis Normal to Part)必需指定一旋转轴 , 可以指定旋转角度 .刀轴矢量始终与指定的旋转轴垂直可指定刀具的导引 ( 前倾 / 后仰 ) 角Rotate the tool axis clockwise (-) or counter-clockwise (+) about the Rotation AxisSimilar to Lead Angle, but with no regard tocut direction – always on the same side ofprojected normal vector..demosample.prt加工电影参看 sample.avi
    • Page 13© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software四轴相对于工件 (4-Axis Relative toPart)与四轴正交于工件相似 , 但可以指定导引角及侧倾角..demo4A_exer.prt
    • Page 14© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software双四轴于工件 (Dual 4-Axis on Part)仅适用于 Zig-Zag 切削模式与四轴相对于工件相似 , 但对 ZIG 及 ZAG 切削方向的刀轨 , 可分别单独定义刀轴矢量参数步距间移动时 , 刀轴矢量从前一条刀轨的结束状态改变为下一条刀轨的开始状态为 ZIG 及 ZAG 切削方向的刀轨分别定义正及负的导引角 , 可以减小刀轴矢量在步距间移动时的变化幅度ZIG 及 ZAG 方向切削条件不一致 , 将导致 :若不指定旋转轴 , 则会产生五轴刀轨若 ZIG 及 ZAG 切削方向刀轨的旋转轴不一致 , 则步距运动将产生不同于四轴 ZIG 及ZAG 往复切削的五轴刀轨
    • Page 15© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software注意检查进刀及退刀运动在切削至零件曲面的末端后 , 必须以退刀运动控制抬刀 , 以防止因为下一刀轨刀轴矢量的变化过切零件
    • Page 16© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software四轴刀轴矢量控制方式
    • Page 17© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software向量插补 (Interpolate)最零活的刀轴控制方法 , 适用于曲线及曲面驱动允许对位于每一个定义点处的刀轴矢量进行控制插补方法 : 线性 – 各数据点之间的刀轴矢量呈常量变化三次方曲线 – 各数据点之间的刀轴矢量呈非线性变化光顺 – 刀轴矢量在所有数据点之间光顺变化..demoSrf_area_9.prt
    • Page 18© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software18选择正确的插补选项RelativeVectorVectorVector display good for preview,but result not desirableMore locations defined, result stillnot desirablePoor visual preview, but generate desirable result
    • Page 19© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software19线性及三次方刀轴插补方法图解LinearCubicNotice the slope at each defining location
    • Page 20© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software向量插补 (Interpolate) 练习( 1 ) 使用向量插补刀具轴的方法加工工件底面加工电影参看 specify_smooth_inerpolation.avi线性及光顺刀轴插补方法对刀轴矢量的影响线性插补 光顺插补..partspecify_smooth_inerpolation.prt
    • Page 21© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software向量插补 (Interpolate) 练习( 2 ) 使用向量插补刀具轴的方法加工工件底面加工电影参看 apply_smooth_inerpolation_1.avi & apply_smooth_inerpolation_2.avi线性插补 光顺插补..demoapply_smooth_inerpolation.prt
    • Page 22© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software正交于驱动面 (Normal to drive)刀轴矢量与驱动面正交 . 如果没有零件面被选取 , 则刀轨直接产生在驱动轴面上 ! 注意检查可能发生的碰撞刀轴矢量正交于驱动面刀轴直接产于驱动曲面上
    • Page 23© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software正交于驱动面练习( 1 )..partaway_from_line_tool_axis.prt 使用正交于驱动面方法加工工件上表面加工电影参看 away_from_line_tool_axis.avi
    • Page 24© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM SoftwareSwarf Drive控制刀轴矢量遵循驱动曲面的直纹等参线刀具侧刃切削驱动曲面 , 刀尖切削零件曲面若刀具是非斜度刀 , 则刀轴矢量与驱动面直纹线方向平行 . 否则 , 刀轴矢量与直纹线成一角度 , 但与直纹线共面 . 驱动面导引刀具侧刃 , 零件面导引刀尖通过指定侧倾角 , 可以使刀具偏离被选取的驱动面个一角度注意 : 如果选取了零件面 , 则刀轨将被投影 ! 这时需要注意选取正确的投影方向
    • Page 25© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM SoftwareSwarf DriveRuling TypeConical Surface that is trimmedGrid of Trim Ruling Base UV RulingTilting Due to Triangular drive surfaceUncut Material Due to CornerSwarf Tilt Angle
    • Page 26© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM SoftwareSwarf Drive 刀轴 练习 使用 Swarf drive 的方法加工工件底面加工电影参看 mam_tub_ftg_mfg_asmb.avi..partmam_tub_ftg_mfg_asmb.prt
    • Page 27© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM SoftwareSwarf Drive 刀轴 练习 使用 Swarf drive 的方法加工大小叶片加工电影参看 cam_Splittered_rotor.avi..partcam_Splittered_rotor.prt
    • Page 28© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software相对于驱动面 (Relative to drive)..demoCASE01_Example.prtThis smoothing function eliminates orreduces the spikes and slips in the toolpath that often result from geometryproblems, such as gaps and overlapsbetween faces, while holding a finishtolerance加工电影参看 CASE01_Example.avi
    • Page 29© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software相对于驱动面练习 (Relative to drive)..part13_tool_axis_smoothing3.prt 使用 Relative to drive 的方法加工叶片加工电影参看 13_tool_axis_smoothing3_1.avi
    • Page 30© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software四轴正交于驱动 (4 Axis Normal to Drive)与四轴正交于工件工作原理相同 , 但刀轴矢量保持与驱动面正交只适用于曲面驱动方法 使用 4 Axis Normal to Drive 的方法加工叶片加工电影参看 13_tool_axis_smoothing3_2.avi..part13_tool_axis_smoothing3.prt
    • Page 31© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software四轴相对于驱动 (4-Axis Relative to Drive)与四轴相对于工件工作原理相同 , 但刀轴矢量之导引角及侧倾角参考驱动面法线方向只适用于曲面驱动方法..demosample.prt 使用 4-Axis Relative to drive 的方法加工工件底面加工电影参看 sample.avi
    • Page 32© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software双四轴于驱动 (Dual 4-Axis on Drive)与双四轴于工件工作原理相同 , 但刀轴矢量之导引角及侧倾角参考驱动面法线方向只适用于曲面驱动方法..demoTA_illustration.prt
    • Page 33© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software刀轨投影 (Same As DrivePath)Planar Mill, Profile CutSame As Drive Path用户自定义 ( User Function)
    • Page 34© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software优化于驱动 (Optimized to Drive Surface)优化于驱动 (Optimized to Drive) 刀轴控制方法根据驱动几何的曲率自动匹配刀轴导引角 . 在外凸区域 ,NX 维持小的导引角以切除更多材料 . 在内凹区域 ,NX 自动增大前倾角以防止刀具后跟部过切驱动几何 . 同时也保持前倾角尽量小以防止刀具前端过切驱动几何只适用于曲面驱动方法Tool lead angle matched to drive geometry requirementsA = cutter toe, B = cutter heel, C = heelgougingD = forehead of cutter gouging, E = drivegeometry13_tool_axis_smoothing3.prttMin. heelclearanceMax leadangle
    • Page 35© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software优化于驱动 (Optimized to Drive Surface)选项Optimized to Drive 选项 描述Minimum Heel Clearance Distance最小跟部安全距离希望刀距后跟部避开驱动几何的最小距离Maximum Lead Angle最大前倾角使用 最大前倾角定义除了由于过切避让的原因之外而需要避让时 , 允许的最大前倾角度 . NX 自动执行过切避让 ( 选项 )注释 :建议此选项缺省为关 . 以允许 NX 自动决定优化的方案Nominal Lead AngleUse Nominal Lead Angle to specify the preferred leadangle to optimize the cutting condition for reasons otherthan optimal material removal. Optimized to Driveautomatically optimizes material removal. (optional)Note:Its recommended to leave this option off and allow NX todetermine the optimal solution automatically.Tilt Angle A fixed tilt angle value. The default is 0.Apply Smoothing Select Apply Smoothing for a higher quality finish.Benefits of Optimized to Drive include:Ensures the tool path is gouge free, and without uncut regions.Ensures maximum material removal to reduce machining time.Ensures cutting with the toe to prolong tool life.
    • Page 36© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software优化于驱动 (Optimized to Drive Surface)..part13_tool_axis_smoothing3.prt 使用 Optimized to Drive Surface的方法加工叶片 加工电影参看 13_tool_axis_smoothing3_3.avi
    • Page 37© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software37产生高质量可变轴加工刀轨的关键因素正确定义零件几何与检查几何驱动几何 , 驱动方法及相关设定正确定义投影向量合理的刀轴控制确保零件 , 检查及驱动几何已妥善准备确保投影向量及刀轴被合理指定NXCAM 可变轴加工的关键因素
    • Page 38© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software38零件及检查几何如果仅用于定义形状 , 模型质量可能已经足够 . 但用于加工编程 (CAM), 很可能并不理想 为产生高品质及高效率刀轨 , 原始几何模型通常需要进行修补及简化 必要时需创建额外及辅助几何以替代用于产生刀轨的原始几何体 额外及辅助几何体的用途 用于在超出切削区域之外的区域产生刀轨 用于将刀轨局限于特定区域 改善刀轨质量
    • Page 39© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software39零件几何重建对刀轨产生的影响
    • Page 40© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software40辅助几何体的作用
    • Page 41© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM SoftwareLesson 6 多轴加工综合实例讲解1. 课程学习目的:本节课程主要综合使用前面课程讲到的各种知识点来创建多轴加工。2. 课程学习目标:对于新 Part 有创建操作的思路。创建的操作能产生符合加工需要刀路。要点:1. 综合使用刀具轴控制方法,投影方法,驱动方法,创建符合加工需要的操作。
    • Page 42© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software综合练习( 1 ) 型芯类工件 加工类型可选用 5 Axis Zlevel , Variablecontour 等。 刀具选用球头刀..partaway_from_point_tool_axis.prt 加工电影 away_from_point_tool_axis.avi
    • Page 43© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software综合练习( 2 ) 薄壁航空类零件 加工类型可选用 contourprofile , Variable contour 等。 刀具选用球头刀..partmam_spar.prt加工电影 mam_spar.avi
    • Page 44© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software综合练习( 3 ) 加工外侧壁 加工类型可选用 contourprofile , Variable contour 等。 采用 Contour Profile 加工需增加辅助底面 刀具选用球头刀或牛鼻刀..partfor_spark.prt 加工电影 for_spark.avi
    • Page 45© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software综合练习( 4 ) 加工圆柱凸轮槽 加工类型可选用 Variablecontour , Contour profile 等。 采用 Contour Profile 加工需增加辅助底面 刀具选用球头刀或牛鼻刀..part0022.prt 加工电影 0022.avi
    • Page 46© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software综合练习( 5 ) 加工圆柱斜孔 加工类型可选用 Variable contour 。 刀具选用鼓形刀..part5ax_ElbowHole_result.prt 加工电影 5ax_ElbowHole_result..avi
    • Page 47© 2008. Siemens Product Lifecycle Management Software Inc. All rights reservedSiemens PLM Software综合练习( 6 ) 叶根加工 加工类型可选用 Variable contour 。 需建立合适的驱动曲面 刀具选用球头刀..part root.prt 加工电影 root.avi