摘 要
板料沖壓成形是一種重要的塑性加工方法，在現(xiàn)代汽車工業(yè)中的應用越來越廣泛，汽車行業(yè)日益激烈的競爭，不僅要求提高沖壓的生產(chǎn)效率，而且對沖壓生產(chǎn)工藝的優(yōu)化控制提出了更高的要求。因此，沖壓工藝技術方法的不斷完善和提高，一直是板料成形技術的研究熱點。隨著計算機軟硬件技術，計算機圖形學等學科的迅猛發(fā)展、CAD技術已成為產(chǎn)品設計人員進行研究開發(fā)的重要工具，其中的三維造型技術已被制造業(yè)廣泛應用于產(chǎn)品及模具設計、方案評審、自動化加工制造及管理維護各個方面。
本次畢業(yè)設計汽車發(fā)動機小覆蓋件為研究對象。根據(jù)給定的三維實體模型，對零件的幾何外形和結構進行分析以確定其成形過程中需要的成形方法。然后，以沖壓工藝手冊等大量參考資料為依據(jù)，通過計算和分析對成形方法的可行性進行驗證。在確定單工序之后，根據(jù)各工序的自身特點確定成形次數(shù)和工序的復合方式，然后利用三維建模軟件UGNX畫出其變形工部圖并計算其毛坯尺寸，從而減少筆算的誤差和工作量。最后，利用模具設計2D、3D CAD軟件，對模具關鍵部件進行三維造型，用于模具制造和模具繪圖。
通過這次畢業(yè)設計，在鞏固以前所學知識的基礎上，對沖壓技術、模具設計、模具制造及計算機輔助設計和計算機仿真技術等方面的知識有了進一步的深入學習。所設計的模具能夠達到實際使用要求，為該產(chǎn)品的成功開發(fā)提供技術保證。

關鍵詞：板料沖壓；模具設計；沖壓工藝分析；計算機輔助設計；覆蓋件














ABSTRACT
Sheet stamping is the most important plastic working method and it's applied to automobile widely more and more. With the increasingly drastic market competition in automobile industry, it requires not only high production efficiency, but also optimized control on the production process. So the continuous improvement of sheet stamping technique and process has been there search hotspot of sheet forming all along. With the swift and violent development of computer hardware and software, finite element method and computer graphics, the computer aided engineering (CAE) technology based on numerical simulation is widely used in sheet forming field.
The part this paper designed is the Controls Engineering. According to the three-dimensional solid model, the geometric shape and structure of the part was analysis to certain the forming method in the forming process of pars. Then, based on the large amount of reference material, the validation of forming methods was designed by calculation and analysis .In according with the characteristics of every process, the frequency and manner of composite process can be curtained, after determining the single operation. Then, every step of three-dimensional diagram was painted with 3D modeling software UGNX, to express a reasonable representation of its process. Finally, using 2D mold design, 3D CAD software, the mold 3D modeling of the key components can be painted for mold and die manufacturing drawings.
Through this graduation project, in the consolidation of previous knowledge on the basis of stamping technology, tooling design, Die manufacturing and computer-aided design and computer simulation technology, and other aspects of knowledge has been further in-depth study. Die designed to achieve actual use requirements for the successful development of products providing technical assurance.

Key words：Sheet stamping; Die design; Analysis for stamping technology;
Computer aided design; Panel







目 錄

中文摘要 Ⅰ

ABSTRACT Ⅱ

1緒論 3
1.1 引言 3
1.2沖壓技術的現(xiàn)狀及發(fā)展方向 3
1.3覆蓋件工藝特點 5
1.4課題最終任務及研究內(nèi)容 6
1.4.1本課題的最終任務 6
1.4.2課題研究內(nèi)容 6

2 零件的沖壓工藝性分析 8

3 工藝方案 9
3.1工藝方案的選擇 9
3.2排樣形式和材料利用率的計算 9
3.2.1排樣 9
3.2.2變形工步圖 10


4 工藝及模具設計 11
4.1落料沖孔模 11
4.1.1毛坯尺寸的確定 11
4.1.2落料沖孔的工藝設計 12
4.2拉深沖孔翻邊壓筋模 19
4.2.1工藝計算 19
4.2.2主要零件設計 24
4.3模具制造要求的確定 25
4.3.1模具材料的選用 25
4.3.2模具熱處理 25
4.3.3模具表面粗糙度及加工配合精度 25
4.4模具成本核算 26

5 結論 28

致謝 29

參考文獻 30