MasterCAMX3教案三维实体造型_三维实体造型教学设计

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Master CAM三维实体造型

实训任务书

加工十一班

任课教师： 李 树 清

目录

一、圆球、圆柱 ·························································································································4

（一）、任务内容 ····················································································································4

（二）、任务目的： ················································································································4

（三）、任务实施： ················································································································4

（四）、任务相关知识 ············································································································5

二、圆锥 ·····································································································································5

（一）、任务内容 ····················································································································5

（二）、任务目的 ····················································································································6

（三）、任务实施 ····················································································································6

（四）、任务相关知识 ············································································································7

（五）、任务练习与拓展 ········································································································8 三．实体旋转 ·····························································································································8

（一）、任务内容 ····················································································································8

（二）、任务目的 ····················································································································8

（三）、任务实施 ····················································································································8

（四）、任务相关知识 ·········································································································· 10

（五）、任务练习与拓展 ······································································································ 11

四、实体倒角 ··························································································································· 12

（一）、任务内容 ·················································································································· 12

（二）、任务目的 ·················································································································· 12

（三）、任务实施 ·················································································································· 13

（四）、任务相关内容 ·········································································································· 15

（五）、任务练习与拓展 ······································································································ 15

五、布尔运算—结合 ················································································································ 16

（一）、任务内容 ·················································································································· 16

（二）、任务目的 ·················································································································· 16

（三）、任务实施 ·················································································································· 16

（四）、任务相关知识 ·········································································································· 17

六、布尔运算—切割 ················································································································ 17

（一）、任务内容 ·················································································································· 17

（二）、任务目的 ·················································································································· 17

（三）、任务实施 ·················································································································· 17

（四）、任务相关知识 ·········································································································· 18

七、布尔运算—交集 ················································································································ 18

（一）、任务内容 ·················································································································· 18

（二）、任务目的 ·················································································································· 18

（三）、任务实施 ·················································································································· 18

（四）、任务相关知识： ······································································································ 19

（五）、任务练习与拓展： ·································································································· 19

八、综合实体： ······················································································································· 19

（一）、任务内容 ·················································································································· 19

（二）、任务目的 ·················································································································· 20

（三）、任务实施 ·················································································································· 20

（四）、任务练习与拓展 ······································································································ 24

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一、圆球、圆柱

（一）、任务内容：根据图1-1利用圆球和圆柱体创建如图1-2所示哑铃实体

图1-1

图1-2

（二）、任务目的：

1.掌握三维实体（圆柱体、球体）的基本创建方法。2.能利用这两个基本图形创建复杂的图形。

（三）、任务实施：

1.单击文件工具栏中的【新建文件】按钮按钮，单击基本实体按钮，选择，在工具栏中单击等角视图，出现如图1-3所示的对话框，单击坐标原点在对话框中输入球体半径20单击【实体】，创建半径为20的球体如图1-4所示。

图1-3

图1-4 2.选择视角为右视图如图1-5所示。

3.基本实体按钮，选择，在坐标值为（80，0，0）处创建同样的圆球，出现圆柱体对

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话框，参数设置如图1-6所示（注意：单击实体，选择Y轴），选择【布尔运算-结合】，最终图形如图1-7所示。

图1-5

图1-6

图1-7

（四）、任务相关知识：

1.圆球和圆柱体有实体和曲面之分

2.圆球和圆柱体的旋转角度均为0到360度

二、圆锥

（一）、任务内容：根据图1-8和图1-9利用圆锥体创建如图1-10所示实体图形

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图1-8（中间大圆锥体）

图1-9（周边小圆锥体）

图1-10（小圆锥体共5个）

（二）、任务目的：

1.掌握三维实体中圆锥体的基本创建方法。2.能利用该图形创建复杂的图形。

（三）、任务实施：

1.单击文件工具栏中的【新建文件】按钮按钮，单击基本实体按钮，选择，在工具栏中单击等角视图，出现如图1-11所示的对话框，单击坐标原点在对话框中输入图1-11所示参数，单击【实体】，创建如图1-12所示的圆锥体。

2.再次单击，根据图1-11所示参数在点（20，0，0）处创建基部半径为10，顶部半径为5，高为10的圆锥体，如图1-13所示

3.选择旋转命令击，将小圆锥体复制4个，参数设置如图1-14所示，单，选择【布尔运算-结合】，最终图形如图1-15所示。

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图1-11

图1-12

图1-13

图1-14

图1-15

（四）、任务相关知识：

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1.圆锥体有实体和曲面之分 2.圆锥体的旋转角度为0到360度

（五）、任务练习与拓展： 利用基本实体命令创建如下图所示实体

1.三．实体旋转

（一）、任务内容：根据图2-1利用旋转实体命令创建如图2-2所示实体

图2-1

图2-2

（二）、任务目的：

1.了解三维实体中【实体旋转】的基本创建方法。2.掌握【旋转操作】和【薄壁设置】等命令的使用。

（三）、任务实施：

1.单击文件工具栏中的【新建文件】按钮。

2.然后单击【绘制任意线】按钮，创建如图2-3所示的二维图形。，在工具栏中单击前视图按钮

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图2-3

3.选择【实体】/【实体旋转】命令或单击实体设计工具栏中的【实体旋转】按钮打开【串联选项】对话框，绘图区系统提示,选取如图2-4所示的串连.，单击串连按钮

图2-4

图2-5 4.选取串联曲线后，单击【串联选项】中确定按钮示，然后单击工具栏中【等角视图】。，绘图区系统提，如图2-5所示，出现方向对话框如图2-6所示，单击

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图2-6

图2-7 5.在出现的【旋转实体的设置】对话框中，参数设置如图2-7所示，再次单击示：，并且单击工具栏中【图形着色】按钮，实体如图2-8所

图2-8

（四）、任务相关知识：

1.【旋转实体】是将二维截面图形绕中心轴线旋转一定角度后，由截 面图形运动轨迹所形成的实体模型。

2.【旋转实体的设置】对话框中【旋转】选项卡： 1）.【旋转操作】选项组：

【建立实体】：按照设定的参数创建一个实体模型。

【切割实体】：按照设定的参数切割一个实体模型。

【增加凸缘】：按照设定的参数为实体模型增加浮雕。

2）.【角度/轴向】选项组：

在【起始角度】和【终止角度】文本框中输入角度的设定值指定旋转的角度。

【重新选取】按钮用于重新设定旋转轴。

【换向】复选框用于自动生成反方向旋转的实体。

3.【旋转实体的设置】对话框中【薄壁】选项卡：设置与挤压内容相同。例：将上图创建为薄壁实体

1.将图3-7所示的【旋转实体的设置】对话框参数设置如图2-9所示，单击【薄壁设置】按钮出现如图2-10所示对话框，单击确定按钮，薄壁实体如图2-11所示。

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图2-9

图2-10

（五）、任务练习与拓展：

1.利用旋转命令创建如下图所示图形

图2-11

2.利用旋转命令创建如下图所示图形

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四、实体倒角

（一）、任务内容：绘制图3-1所示图形，利用【单一距离倒角】将其上表面倒角半径为5，利用【不同距离倒角】绘制图3-2所示图形和利用【距离/角度倒角】绘制图3-3所示图形，将其上表面倒角半径为5

图3-1

图3-2

图3-3

（二）、任务目的：

1.掌握单一距离倒角、不同距离倒角、距离/角度倒角的基本操作方法。2.掌握实体倒角的各参数的设置

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（三）、任务实施：

1.单一距离倒角

1）.选择【实体】/【倒角】/【单一距离】命令，或单击实体设计工具栏中的【单一距离】按钮2）.绘图区系统提示。

选取实体表面，按回车键，出现如图3-所示的对话框，设置倒角距离为5，单击3）.图3-5是图3-6倒角后的效果。

3-4

图3-5

图

2.不同距离倒角

图3-6 1）.选择【实体】/【倒角】/【不同距离】命令，或单击实体设计工具栏中的【不同距离】按钮2）.绘图区系统提示

选取实体表面，按回车键，出现如图3-7

所示的对话框，设置第一倒角距离为4，第二倒角距离为8，单击3）.图3-9是图3-8矩形倒角后的效果图。

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图3-7

图3-8

3.距离/角度倒角

图3-9 1）.选择【实体】/【倒角】/【距离/角度】命令，或单击实体设计工具栏中的【距离/角度】按钮2）.绘图区系统提示。

选取实体表面，按回车键，出现如图3-10

所示的对话框，设置第一倒角距离为5，角度为45度，单击3）.图3-12是图3-11矩形倒角后的效果图。

图3-10

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图3-11

图3-12

（四）、任务相关内容：

1.倒角是在实体的边线处生成一个有一定角度的斜面，倒角有单一距离倒角、不同距离倒角、距离/角度倒角三种方法。

2.单一距离倒角：在倒角的两个表面截取相同的长度时，指定一个距离来倒角。

3.不同距离倒角：在倒角的两个表面截取不同的长度时，指定两个距离来倒角。

4.距离/角度倒角：在倒角的一个表面截取一定长度，并以一定的角度修剪另一表面时，需要指定距离和角度进行倒角。

（五）、任务练习与拓展：

1.拉伸实体，并且倒角和倒圆角

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五、布尔运算—结合（一）、任务内容：利用【布尔运算—结合】命令创建图4-1所示图形

图4-1

（二）、任务目的：掌握布尔运算中结合运算的相关知识。

（三）、任务实施：

1）.单击文件工具栏中的【新建文件】按钮按钮，选择，然后选择

以原点创，在工具栏中单击等角视图2）.单击基本实体按钮建如图4-2所示图形

3）.选择【布尔运算—结合】命令，出现，选中长方体和圆柱体，按回车键，长方体实体和圆柱体实体结合为一个实体。

4）.线架实体原形如图4-3所示，线架实体最终图形如图4-4所示。

图4-2

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图4-3

（四）、任务相关知识：

图4-4

1.实体并集运算是指将图形中已存在的、部分重叠（至少共面）的多个三维实体无缝的连接成一个实体。

六、布尔运算—切割

（一）、任务内容：利用【布尔运算—切割】命令创建图4-5所示图形

图4-5

（二）、任务目的：掌握布尔运算中切割运算的相关知识。

（三）、任务实施：

1）.单击文件工具栏中的【新建文件】按钮按钮。，选择

和画多边形，利用挤出命令创，在工具栏中单击等角视图2）.单击基本实体按钮建如图4-6所示图形

3）.选择【布尔运算—切割】命令，选中球体和六方体，按回车键

4）.创建最终图形如图4-7所示。，出现

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图4-6

图4-7

（四）、任务相关知识：

1.实体差集运算是指两个实体有部分重叠，或者一个实体完全包含了另一个实体，可以从该实体中挖去一个实体，从而在该实体中产生一个凹坑，甚至一个空洞。

七、布尔运算—交集

（一）、任务内容：利用【布尔运算—切割】命令根据图4-8创建图4-9所示图形

图4-8

图4-9

（二）、任务目的：掌握布尔运算中交集运算的相关知识。

（三）、任务实施：

1）.单击文件工具栏中的【新建文件】按钮按钮。，选择

和，在工具栏中单击等角视图2）.单击基本实体按钮所示图形，创建如图4-103）.选择【布尔运算—交集】命令，出现

徐水职教中心机械加工工专业，选中球体和圆柱体，按回车键

4）.创建最终图形如图4-11所示

图4-10

图4-11

（四）、任务相关知识：

1.交集运算是获得两个实体的重叠部分，仅有公共面而没有重叠的两个实体无法通过交集运算，获得它们的公共平面（曲面）。

（五）、任务练习与拓展：

1.利用挤出，布尔运算等命令创建如图所示图形

八、综合实体：

（一）、任务内容：创建烟灰缸的三维造型，如图1所示

徐水职教中心机械加工工专业

图1

（二）、任务目的：

1.掌握挤出命令在实际图形中的运用。2.熟悉倒圆角命令的使用 3.掌握抽壳命令的运用

（三）、任务实施：

1）.单击文件工具栏中的【新建文件】按钮钮键，按绘制矩形的快捷键，在工具栏中单击俯视图按

进行绘制长宽各为50的矩形，再按矩形的快捷进行绘制长宽各为40的矩形，对其倒圆角，半径为10，并对其进行定位于原点。如图2所示。

图2 2）.选择菜单栏中的【实体】/【挤出】命令，弹出串联选项对话框如图3所示，并选择串联的快捷键，选择串联曲线50X50的矩形，再按下确定

徐水职教中心机械加工工专业

键，弹出实体挤出的设置对话框，如图4所示。并做以下设置：选中增加拔模角的复选框，设置角度为18度；选朝外的复选框；挤出的距离设置为20mm，再按确定键，得到图5的结果。

图3 图4

图5 3）、再次选择菜单栏中的【实体】/【挤出】命令，弹出串联选项的对话框（图6），并选择串联的快捷键定键，选择串联曲线40X40的矩形，并按下确，弹出实体挤出的设置对话框（图7），并对其做以下设置：增加拔模

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角的复选框角度设为10度；去除朝外的复选框；挤出的距离设置为18；选中 “切割实体”复选框，按确定键

得到图8所示结果。

图6

图7

图8（4）、分别选择

和，在原点各画半径为3的圆，然后执行菜单栏中的【实体】/【挤出】命令，弹出串联选项的对话框，如图6所示。并选择串联的快捷键，选择串联曲线R3圆，再按下确定键，弹出实体挤出的设置对话框如图9所示，并对其做以下设置：去除增加

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拔模角的复选框；选中“切割实体”和“两边同时延伸”的复选框再按确定键。再经过步骤（4）选择另串联曲线R3圆，得到如图10所示的图形。

图9

图10（5）、执行菜单栏中的【实体】/【倒圆角】命令，选择选择面，单击需要倒角的面，按回车键出现如图11所示图形，单击，图形如图12所示。

图11 图12 6）.单击实体抽壳命令实体的底平面，按回车键，确定。，出现，选择 7）.单击烟灰缸底平面，最终实体如图13所示（图14为烟灰缸底平面视图）。

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图13

图14

（四）、任务练习与拓展：

1.下图为玩具盒盖，材质为塑料，试做出其实体。

2.利用直线命令、圆弧命令、矩形命令和椭圆命令绘制台灯罩线架，并利用旋转实体命令、扫描实体命令和拉伸实体命令绘制三维实体模型。

徐水职教中心机械加工工专业

机动练习题：

练习1-基本实体

徐水职教中心机械加工工专业

练习2-基本实体

练习3-挤出实体与布尔运算

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练习4-挤出实体与布尔运算

练习5-旋转建模

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练习6-扫描实体

练习7-实体薄壳

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练习8-综合练习

练习9-综合练习