发布时间 : 星期四 文章CADCAM软件实践报告 - 图文更新完毕开始阅读b4ac7afc0a1c59eef8c75fbfc77da26924c59670
(3)倒圆角：
2、零件模具CAD
模具材料选用718模具钢，精度选择7级精度。 （1） 凸模
k=2% δ=0.2 L凸=174mm D凸=114mm H凸=57mm l凸=[L凸(1+k)+(3/4)△]- δ
=[174×(1+0.02)+0.75×1.4]-1.4/6
=178.53-0.23
d凸=[D凸(1+k)+(3/4)△]- δ
=[114×(1+0.02)+0.75×1.0]-1.0/6
=117.03-0.17
h凸=[H凸(1+k)+(2/3)△]- δ
=[57×(1+0.02)+2/3×0.64]-0.64/5
=58.567-0.128 模具样图如下：
（2） 凹模
k=2% δ=1/6 L凹1=180mm L凹2=192mm D凹1=120mm D凹2=132mm H凹=60mm
l凹1=[L凹1(1+k)-(3/4)△]+δ
=[180×(1+0.02)-0.75×1.5]+1.5/6
=182.475+0.25
l凹2=[L凹2(1+k)-(3/4)△]+δ
=[192×(1+0.02)-0.75×1.5]+1.5/6
=194.715+0.25
d凹1=[D凹1(1+k)-(3/4)△]+δ
=[120×(1+0.02)-0.75×1.1]+1.1/6
=121.575+0.18
d凹2=[D凹2(1+k)-(3/4)△]+δ
=[132×(1+0.02)-0.75×1.1]+1.1/6
=133.815+0.18
h凹=[H凹(1+k)-(2/3)△]+δ
=[60×(1+0.02)-2/3×0.64]+0.64/6
=60.773+0.11
模具样图如下：
（二） 模具CAE（ANSYS模具结构分析）
步骤： 1.1进入ANSYS 1.2设置计算类型
ANSYS Main Menu: Preferences… →select Structural → OK
1.3选择单元类型
ANSYS Main Menu: Preprocessor →Element Type→Add/Edit/Delete →Add →select Solid Quad brouw 8node 92 →OK (back to Element Types window) → Options… →select K3: Axisymmetric →OK→Close (the Element Type window)
1.4定义材料参数
ANSYS Main Menu: Preprocessor →Material Props →Material Models →
Structural →Linear →Elastic →Isotropic →input EX:2e11, PRXY:0.3 → OK
1.5生成几何模型
用ANSYS导入功能，直接导入已存的*igs格式文件，导入后如图显示
1.6网格划分
ANSYS Main Menu: Preprocessor →Meshing →Mesh Tool→(Size Controls)Areas set:拾取面→OK→ back to the mesh tool window)Mesh: Areas, Shape: Quad, Mapped →Mesh →Pick All (in Picking Menu) → Close( the Mesh Tool window)划分后如图