汽車鈑金衝壓模具設計之鈑金製程規劃

Process Planning of Automobile Sheet Metal For Stamping Die Design

劉昆育(Kun-Yu Liu)

指導教授 ： 尤春風

國立臺灣大學/工學院/機械工程學研究所/碩士(2010年)

https://doi.org/10.6342/NTU.2010.01310

摘要

本文以知識專家系統的方法建立汽車鈑金製程規劃(CAPP)系統，由特徵辨識提供鈑金加工特徵作規則式推論分析，計算工序或機構位置、方向等資訊，並以知識工程(KBE)系統作為知識管理。

模具工法即為鈑金加工製程，利用鈑金成型的物理特性可以推斷加工方式，但推論法則複雜繁多，且常存在難以記錄的隱性知識中，CAPP專家系統有效地將複雜知識規則以參數化、系統化儲存於資料庫，並且讓使用者彈性化修改。探討工法推論規則與特徵之間的關係建立規則推論引擎，制訂工法與特徵的資料流協定，以個別案例儲存於知識庫中來保留模具設計過程及提供舊案例的相似性搜尋與重用。

實作方式以Java語言建立CAPP專家系統，以Spring Solid System處理鈑金曲面模型資料進行特徵辨識作為推論引擎輸入端，輸出端是將工法協定資料以VB橋接器傳至CATIA作模具設計導引。利用CATIA設計樣板功能建立標準零件資料庫，利用工法編排機構位置，以機構決定模具尺寸參數來輔助模具實體繪製。

關鍵字

汽車鈑金衝壓模具 ； 製程規劃 ； 知識工程 ； 專家系統 ； 規則式推理 ； 規則表示法

並列摘要

Base on the methodology of knowledge-based expert systems, a CAPP(computer-aided process planning) system for automobile sheet metal is constructed. This system use rule-based reasoning to analyze the data of feature recognition, to provide the information of processes like the direction and the location of mechanisms. This system also use KBE (Knowledge-based Engineering) system to manage those information data.

The principle of stamping die design is the manufacturing processes of automobile sheet metal. According to the physical laws of forming sheet metal, the process can be decided. But the knowledge rules are complicated and manifold. Most of them are the tacit knowledge or experience. The CAPP system stores those rules to the database systematically and parametrically. The user can modify the data flexibly. The rule-based reasoning engine is building on the relation between feature and process rule. This paper define the process protocol and feature protocol to represent the feature of sheet metal and the process of stamping die. The process of die design case by case is stored in database for reusing the similar design case.

The CAPP system was implemented by Java language and embedded into the Spring Solid System for surface model. Use the surface model to recognize features as the input of CAPP system. The output is using VB bridge transfer the pass process protocol on Design Guide System that based on CATIA platform. CAPP system also use CATIA Power Copy function to build the standard part template library, and decide the location of mechanisms to provided the solid model designing of stamping die.

並列關鍵字

Stamping Die of Automobile Sheet Metals ； Process Planning ； Knowledge-based Engineering ； Expert System ； Rule-based Reasoning ； Knowledge rule Representation

參考文獻

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