【文章內(nèi)容簡介】 定，最后圖紙和說明書的完成。在此期間，讓我認識到無論做什么事一定要有恒心，要用心去做，就像剛開始的時候沒設(shè)計過沖壓模具，不知道如何下手，但隨著一點點的開始，通過查閱資料和指導(dǎo)老師的幫助，慢慢結(jié)合以前學(xué)的專業(yè)知識，使自己的設(shè)計一步步完善起來，雖然每次找老師后都會改很多，但每次的改進也讓我收獲頗多。本次畢業(yè)設(shè)計讓我系統(tǒng)地鞏固了大學(xué)四年的學(xué)習(xí)課程，通過畢業(yè)設(shè)計使我了解到模具實際設(shè)計和加工。本次設(shè)計涉及的知識很多，涉及到工程制圖、沖壓工藝學(xué)、模具制造工藝、成型設(shè)備、金屬學(xué)與熱處理、CAD繪圖等相關(guān)課程的知識。在校期間的我還進行了金工實習(xí)、和兩次課程設(shè)計。這些課程的學(xué)習(xí)以及課程設(shè)計的實踐為這次畢業(yè)設(shè)計打下了良好的基礎(chǔ)。 本次畢業(yè)設(shè)計是在老師的關(guān)心和悉心指導(dǎo)下完成的。在設(shè)計過程中老師的淵博知識以及平和的人生態(tài)度是值得我學(xué)習(xí)的，是我以后工作和學(xué)習(xí)的楷模。在此，我衷心的感謝所有教過我課的老師，謝謝他們的指點。這次畢業(yè)設(shè)計能夠順利完成，離不開班級同學(xué)們的熱心幫助，更離不開老師對我的我耐心指導(dǎo)和大力支持，借此向他們表示衷心的感謝。參考文獻[1].[M].北京：機械工業(yè)出版社，2013.[2].[M].北京：國防工業(yè)出版社，2011. [3].[M].北京：北京理工出版社，2009.[4].[M].北京：北京理工大學(xué)出版社，2007. [5].[M].長沙：湖南科學(xué)出版社，2009. [6].[M].北京：機械工業(yè)出版社，2014. [7].[M].北京：清華大學(xué)出版社，2006. [8].[M].南昌：江西科學(xué)技術(shù)出版社,，2003. [9].[M].北京：機械工業(yè)出版社，2005. [10].[M].北京：化學(xué)工業(yè)出版社，2014. [11].[M].北京：化學(xué)工業(yè)出版社，2014. [12].[J].模具技術(shù)，2001，05期：14.[13][S].北京:中國標(biāo)準(zhǔn)出版社，2008.附錄原文：A Recongurable Stamping Die and Its Stamping ProcessAbstract: A recon?gurable ?exible poles die was developed. The die can be used to implement the process of “the multipoint pressing and forming sheet”. Sheet metal is restricted by the elastic pressing forces putting on the upper and lower surfaces of sheet in stamping process. The method is an e?ective way to enhance the buckling critical stresses and reduce wrinkling of sheet. The results of tests indicate that the die can achieve “one die brings multipurpose” and suppress the wrinkle of sheet. The process of the multipoint pressing and forming sheet provides a practical and e?ective way for the curved sheet metal forming.Key words: stamping process, wrinkle, recongurable, die1 .IntroductionWrinkling of sheet metal seriously infuences the forming quality and the life of die. It may make the forming process unable to carry on. So effectively suppressing wrinkle seems to be highly important. Inrecent years, in order to meet the demand of light and tough sheet metal, thin sheet metal parts are widely applied in various fields. The study of Wrinkling bees one of the hottest research topics.Since the near century, many scholars have brought massive studies and discussions into the instability of sheet. These researches covered from the experimental study and the theoretical analysis to the numerical simulation, from the sheet drawing and the bend forming to the hydroforming, from the wrinkle forecast to the buckling control and so on.Recently, numerical simulation of a forming process is applied to study on wrinkle. Depending on the modern advanced research methods, numerical simulation based on the finite element method has bee the main tool of study wrinkling in decades.However, majority studies encircle wrinkling bifurcation of sheet metal and the situations of wrinkling at the present time. But these cannot bring any feasible method for controlling the wrinkles in stamping.Currently, the representative research and application of the reconfigurable die technology is the multipoint forming technology. The basic principle is using a series of regular and adjustable the basic bodies (poles) to construct the structure of a die. Thus, the reconstruction of die can be achieved, but the wrinkling in the sheet metal has not been suppressed.The paper emphasizes how to control wrinkle of sheet forming. Main ideas in the paper are two: One idea is to improve the supporting condition of sheet metal and increase its buckling critical stresses. Thus, “the multipoint pressing and forming sheet technique will be proposed. Another idea is to explore a reconfigurable die which is bining the technique of “the multipoint pressing and forming sheet.2. Poles Flexible DieIn order to reduce the wrinkling of sheet, a method of using elastic pressing forces putting on surfaces of sheet in stamping process was presented, it can improve the stability of sheet metal.A new recon175。gurable die was developed. The die has high effciency in reconfiguration so that it can achieve multipurpose use. Simultaneously the die can be carried out the process of “the multipoint pressing and forming sheet.Curved sheet metal parts are used in many products such as aerospace products, military products, ships and engineering machines, the batch of parts is small. Different shape requires different die for forming sheet metal. It leads to high cost and long cycle. To meet this situation, the reconfigurable stamping die has been explored. The die can be applied to forming a variety of sheet parts by reconfiguring. The novel die is named as “poles fiexible die.Poles fiexible die is a kind of reconfigurable stamping die. Figure 1 shows the structure. The die is bined with some discrete adjustable poles which are assembled in an array. The length of pole can be adjusted. After analyzing 3D model39。s data of sheet part,the length of each pole can be adjusted accurately.1—Frame, 2—Screw rod, 3—Adjustable sleeve, 4—Ba?e 5—Jointer, 6—Punch head, 7—Blankholder, 8—Sheet metalFig. 1 The structure of poles ?exible die Punch head located in the end of pole can be replaced with relevant shape head. All heads are constituted the surface of die so that it is conformed to the shape of sheet part. The die is posed with ?exible poles. In order to realize the multipoint pressing and forming sheetprocess, the adjustable pole is designed as a ?exible pole with the function of “pressing sheet” and “forming sheet”. Figure 2 shows the scheme of the ?exible pole.A–A B–B1—Stepping motor, 2—Frame, 3—Screw rod,4—Pressure spring, 5—Adjustable nut, 6—Adjustable sleeve,7—Punch head, 8—Pressing distanceFig. 2 The schematic of the ?exible poleIt can be seen from Fig. 2 that position of sleeve is restricted by the adjustable nut in ?exible