Auto CAD CAD中基于VBA的冲压模架开发外文翻译资料

 2022-11-28 15:20:05

Advanced Materials Research Vol 507 (2012) pp 222-225 Online: 2012-04-25

copy; (2012) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/AMR.507.22 2

The Development of Stamping Mold Frame based on VBA in Auto CAD Weihua Jia, Xiaohua Li

Guangxi Electric Power Institute of Vocational Training, Nanning, 530007, China

Weihua_Jia@yeah.net

Keywords: AutoCAD; VBA; Stamping die; Parameter design

Abstract. As re-development tools based on AutoCAD, VBA (Visual Basic for Applications) makes punching die of development, and compared with the traditional mold manufacture method it has a series of advantages like increasing productivity, improving product quality, reducing cost, and reducing labor intensity. This paper mainly introduces in VBArsquo;s development environment to research parameter design through punch mould so as to improve the design efficiency.

Introduction

At present, many industrial design enterprises use AutoCAD mould development software for industrial design. It greatly shortens the die design and manufacturing time, increases the work efficiency, increases the production operation cycle, and improves manufacturing capacity. This paper develops punching die mainly based on AutoCAD second development tools VBA (Visual Basic for Applications). First, we set up the stamping dies 3-D model. Second, we make optimization design of a 3-D model line on the structure. Third, we go through processing programming of the optimization design 3-D model and make stamping die technology plan. The design steps are shown in Figure 1 below.

Fig.1. Design steps of the stamping die model

A stamping mould is composed by seven complete parts: First, working parts (F1). Second, positioning parts (F2). Third, unloaded parts (F4). Fifth, guide components (F5). Sixth, support components (F6). Seventh, fastening parts (F7). Its structure is shown in Figure 2.

Fig.2. Stamping mould structure

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Advanced Materials Research Vol. 507 223

System logic design

For the development of stamping dies, we use AutoCAD re-development tools: VBA tools. It mainly includes a series of operations including user login system.

After the user logs in AutoCAD, we obtain parts process information, and then based on parts topologies geometry information database data, we open the line of the graphics processing. After dealing with the line stamping process analysis, optimization of layout design and drawing the calculation image in pressure center. Finally we make the design information output in the mold design information database. The design flow chart of the system logic relationship design is shown in Figure 3.

Fig.3. Flow chart of the system

System model analysis

A pair of typical stamping mould should composed by nine parts: stamping parts graph, cutting process performance, raw materials, layout diagram, working parts, positioning parts, unloaded parts, orientation and fixed and support parts, components and so on. According to the nine system components of the subsystem, we construct the system model of the punch mould structure is shown in Figure 4:

(1) Model framework of stamping mould two-dimensional plan

The generation of stamping mould two-dimensional plan can be divided into a few steps:

Step 1, define variables and connect to database.

Step 2, define layer according to the system function in the database.

Step 3, open the database to get the needed parameters, and define map needed according to the parameter value.

Step 4, get orientated graphics.

Step 5, get the coordinates according to the computer graphics orientated.

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Step 6, set size and tolerance according to system sub-program, then open drawing command to make the line graphic.

Step 7, calculate each pointrsquo;s coordinate needed for dimension and tolerance. Step 8, close the database.

Fig.4. System model of the punch mould structure

(2) Stamping mould structure design model

Stamping mould structure design mathematical model is mainly composed of function and structure around the word matrix and stamping mould structure elements association chart. stamping mould structure elements association chart is:

G = (B,C ) (1)

In this equation B = {bii= 1,2,3, N }, N is the amount of the structure elements.

The structure around the word matrix is F = (Pi;) = [Btimes;F].

F is the set of structure, F={F1, F2 ,F3 ,F4 ,F5}.

The equation of the initial value of the function structure is F 0 = (1 ,1 ,1 ,1 ,1 , )

And its mapping relationship is F ( )Pi; = VN F (b i )

i =1

In this equation, N is the amount of the structure elements.

Structure diagram

Through the front logic design and model d

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Auto CAD CAD中基于VBA的冲压模架开发

萧华丽

广西电力职业技术学院，南宁，530007，中国

摘要:基于AutoCAD的二次开发工具VBA（Visual Basic应用程序）进行了冲压模具的发展，并与传统的模具制造方法具有一系列的优点相比，像提高生产率，提高产品质量，降低成本，减轻劳动强度。本文主要介绍在VBA的开发环境下，通过冲裁模具进行参数化设计，提高设计效率。

关键词：AutoCAD；VBA；冲压模具；参数设计

介绍

目前，许多工业设计企业使用AutoCAD模具开发软件进行工业设计。大大缩短了模具设计和制造时间，提高了工作效率，增加了生产运行周期，提高了制造能力。本文主要开发基于AutoCAD二次开发工具VBA的冲模（VB应用程序）。首先，建立了冲压模具三维模型。其次，对结构的三维模型线进行了优化设计。第三，对优化设计三维模型进行加工编程，制定冲压模具工艺方案。设计步骤如图1所示。

图1.冲压模具模型的设计步骤

冲压模具由七部分组成：第一，工作部件（F1）。第二，定位零件（F2）。第三、空载零件（F4）。第五，引导组件（F5）。第六、支持组件（F6）。第七、紧固件（F7）。其结构如图2所示。

图2.冲压模具结构

系统的逻辑设计

对于冲压模具的开发，我们使用AutoCAD重新开发工具：VBA工具。它主要包括一系列的操作，包括用户登录系统。

用户在AutoCAD中登录后，获取零件加工信息，然后根据零件拓扑几何信息数据库数据，打开图形处理的行。在进行线冲压工艺分析、优化版图设计、绘制压力中心计算图。最后在模具设计信息库中进行设计信息输出。系统逻辑关系设计的设计流程图如图3所示。

图3.系统流程图

系统模型分析

一副典型的冲压模具应该由九部分组成：冲压件图、切削加工性能、原材料、布局图、工作部件、定位零件、卸荷零件、定位固定件和支撑件、零件等。根据子系统的九个系统的组成部分，我们构建了系统模型的冲头模具结构如图4所示：

  1. 冲压模具二维规划模型框架

冲压模具的生成二维规划可分为几个步骤：

步骤1：定义变量并连接数据库。

步骤2：根据数据库中的系统功能定义图层。

步骤3：打开数据库获取所需参数，根据参数值定义需要的映射。

步骤4：获取面向图形。

步骤5：根据计算机图形获取坐标。

步骤6：根据系统子程序设置大小和公差，然后打开绘制命令，使线条图形。

步骤7：计算尺寸和公差所需的每一点坐标。

步骤8，关闭数据库。

图4 冲裁模结构的系统模型

  1. 冲压模具结构设计模型

冲压模具结构设计的数学模型主要是由功能和结构围绕单词矩阵和冲压模具结构元素关联图。冲压模具结构元素关联图：

克=（b，丙）（1）

这个方程中的b = {双我= 1,2,3，n}，结构元素的数量n。

全球矩阵结构F =（Pi;）=【Btimes;F ]。

F是一组结构，F = { F1，F2，F3，F4，F5。

函数结构的初值方程是f 0 =（1，1，1，1，1）

其映射关系f（）Pi;= VN F（B I）

i= 1

在这个等式中，n是结构元素的数量。

结构图

通过前面的逻辑设计和模型设计，得到了冲压模板设计过程。首先，对冲压模具线结构进行分解，确定其功能结构和围绕词集。根据功能分解确定元素集。第三、设计元素根据工艺图关联设计要求。第四，根据矩阵和布尔逻辑运算建立函数结构。第五、根据相关图确定要素集合。第六、设计图形优化设计。其设计图如图5所示。

图5设计图

结论

以AutoCAD VBA为开发平台，建立了模具标准参数库，开发了冲压模具设计图。提出了一种新的CAD开发环境，缩短了模具的设计周期，提高了设计效率。同时，我们也为模具设计者提出了新的思路。该技术的可行性对模具设计开发具有一定的积极意义。

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