拉延成型 的英文怎麼說
中文拼音 [lāyánchéngxíng]
拉延成型
英文
stretch forming-
This paper referred to the massive domestic and foreign technical material, elaborated in the sheet forming value simulation theory essential technology in detail, points out when analysis sheet forming question should use the big distortion ball plasticity fem and introduce the application characteristic and the function summarizes of the sheet forming simulation software dynaform. secondly, analyzed the cover forming characteristic, simultaneously introduced the influence cover forming factor in detail : such as ramming direction, the craft addendum surface and the material pressing surface, the radius of convex - concave mold, draw bead, pressure strength, blank size and craft margin and so on. and simulates many typical automobiles cover panel with software : such lateral board, back taillight pedestal and storage cover
其次，分析了覆蓋件成形的特點和要求，同時詳細介紹了影響覆蓋件成形的因素如沖壓方向、工藝補充面和壓料面、凸凹模圓角、拉延筋、壓邊力、坯料尺寸和工藝切口等，並用數值模擬軟體對多個典型的汽車覆蓋件汽車后側圍板、后燈座以及轎車后備箱蓋的沖壓成形情況進行模擬，用模擬結果優化拉延工藝方案，比較了內覆蓋件和外覆蓋件在成形特點和要求的一些異同點，以及常見的起皺、拉裂和回彈、成形不足等缺陷的產生機理和相應對策，重點介紹工藝補充面和壓料面的設計及優化方法，因為拉延是沖壓工藝的關鍵工序，而工藝補充面和壓料面的設計是拉延工序的關鍵，對消除缺陷至關重要。The cleaning cars has seven major characteristics : 1, the vehicle design aesthetic appearance generous, simple, flexible cleaner compact cab from the sanitation workers in the rain, snow and inclement weather operations headaches ; 2, jia lu cleaning electric car gearbox is my companys patented products, latin america is characterized by heavy goods, light down - climbing and extended battery life ; 3, jia lu electric bicycle bridge cleaning car brake, the company is a patent product, is characterized by simple structure, convenient operation, maintenance easier, better braking performance ; 4, good deer electric car cleaning dustbins with low human workers the high - school, so that sanitation workers can easily handling, reversing a good sight, and reduce incidents, high safety factor ; 5, good deer electric cleaning trucks advanced electric power putter as a dump, the sanitation workers to reduce labor intensity, is characterized by fewer power failures, maintenance - free ; 6, jia lu electric vehicle using toughened glass cleaning cars, advance reversing have good vision, difficult to scratch and ensure the safety of sanitation workers ; 7, good deer by external electric car cleaning plate, a fiberglass liner internal, external characteristics : hinge not on the plate yi loose, often not dump deformation and withstand collisions, the internal use of fiberglass liner, not rust, corrosion, wear after the liner can be replaced, maintaining low cost
該保潔車有七大特點： 1 、該車外型設計美觀大方，操作簡單靈活，明凈小巧的駕駛室免除了環衛工人在雨雪等惡劣天氣作業時的煩惱； 2 、佳鹿電動保潔車變速箱是我公司的專利產品，特點是拉重貨，輕松爬坡而且省電，延長電瓶的使用壽命； 3 、佳鹿電動保潔車后橋雙輪制動，是我公司的專利產品，特點是結構簡單，操作方便，維修容易，制動性能好； 4 、佳鹿電動保潔車超低的垃圾箱符合人體工程學的高度，使環衛工人能輕松地裝卸，倒車時具有良好的視線，減少事故的發生，安全系數高； 5 、佳鹿電動保潔車採用先進的電動推桿作為自卸動力，減輕了環衛工人的勞動強度，特點是故障少功率大，免維護； 6 、佳鹿電動保潔車整車採用鋼化玻璃，前進倒車都有良好的視線，不易劃傷，保證環衛工人的安全； 7 、佳鹿電動保潔車外部採用鋼板，內部採用玻璃鋼內膽，外部特點：鉸鏈在鋼板上不易松動，經常自卸不變形，經得起碰撞，內部採用玻璃鋼內膽，不生銹、不腐蝕，磨損后內膽可以更換，維護成本低。A finite element model describing the drawing process of the heat - shield panel of automobile engine is established by using the commercial dynamic explicit code ls - dyna
摘要使用基於動態顯式演算法的商業軟體ls - dyna建立了某汽車發動機隔熱罩拉延成形的有限元模型，通過所建立的有限元模型分析了壓邊力對拉延成形的影響。The relative density of the sample has reached as high as 97. 4 % of fully dense. the mean micro hardness has reached hv496. 3. the fractography of the fracture section of the tensile sample was characteristic of dimple typically which indicated that the fracture belong to ductile fracture
；試樣相對密度可以達到理論值的97 . 4 ；硬度方面由於激光立體成形工藝的特點，最後幾層的硬度比開始時的高，平均硬度達到了hv496 . 3 ；拉伸試樣的斷口形貌具有典型的韌窩特徵，屬于延性斷裂。The changes of characteristics of material and geometry caused by stamping all influence the precision of cae. in this thesis it also shows that a typical structure and a simplified car model were built using one step forming and mapping method based on vpg and kmas software, thus enabling us to define it fast fine simulation method ( ffs ) ; likewise, the pure static bend test and the front impact test complied with ecer42 were respectively completed
4 .本文首次將快速精細模擬分析（ fastfinesimulation - ffs ）方法應用到車身典型結構件的靜態純彎特性研究，利用kmas軟體進行了該模擬模型一步成型拉延分析，通過試驗和模擬分析結果對比，驗證了拉延工藝對車身結構件力學特性的重要影響。Methods the 54th generation of transformed human embryonic tendon cells and artificial composite materials of carbon fibers ( cf ) and polyglycolic ( pga ) were co - cultured in vitro to construct tet. lt was frozen in liquid nitrogen with four kinds of cpa for 2 months. post - thawed quickly and transplanted into hind limbs of nude mice, and repaired the defects of achilles tendon. after 2, 4, 6, 8, 12 weeks, the morphological, histological, ultrastructure, short tandem repeat loci and immunohistochemistry examination were detected, and biomechanical strength of tet were examined. result tendon cell survived and could secret type i collagen after 12 weeks to transplanted into nude mice. in the group of dmso + raffmose + kh2o4, vacuole in mitochondrion degraded i tendon cell ranged in order, abundant collagen fibers were found and linked each other and the biomechanical strength was increased as time elapsed. c onclusion dmso + raffmose + kh2o4 could protect tet in deep low temperature
組織工程肌腱制備完成後在四種抗凍劑保護下液氮凍存2月；快速復溫后植入裸鼠以修復跟腱缺損， 2 、 4 、 6 、 8 、 12周后取出，觀察形態學、組織學、電鏡和免疫組織化學變化，短串聯重復位點檢測和生物力學變化。結果實驗組組織工程肌腱體內植入12周后仍有肌腱細胞存活並分泌型膠原；隨著時間延長， 10二甲基亞碸（ dmso ） +棉子糖（ 30mmol l ） + kh _ 2po _ 4 （ 25mmol l ）組線粒體空泡減少，肌腱細胞排列整齊，膠原纖維增粗並連接，抗拉強度增高。In the last chapter of this thesis, we introduce two kinds of sheet metal parts. one is forming part which require very accurate prediction of blank shape, the other is drawing part which need just approximate prediction of blank shape. we apply the scale coefficient method to predict the blank shape of these two kinds of sheet metal parts
文中最後一章，給出了兩類典型的沖壓零件，一類是落料后直接成形的零件，該類零件初始板料的形狀及尺寸要求非常精確;另一類是兩次拉延成形的零件，這類零件的初始板料要求適合的形狀及尺寸即可。In this thesis it was proposed to simulate the drawing, trimming, flanging by using error - adjustment method. the initial trimming lines would be adjusted and optimized in the computer by adjusting error. if the shape error between the flanging boundary line and the target is larger than prescribed, the redundant area is subtracted from the initial blank by some amount of volume along the deformation path, and the insufficient volumes are added to the initial blank by the same amount
本文提出，利用基於變形路徑的誤差修正法（ error - adjustment ） ，結合cae技術將對初始修邊線的調試過程在計算機中進行模擬（包括拉延、修邊、翻邊、整形等）計算，通過控制翻邊后零件成型邊界與實際目標輪廓之間的尺寸誤差來優化修邊線，如果初始切邊、翻邊后的輪廓與目標體的邊界存在較大偏差，則初始切邊輪廓中多餘部分單元將沿其變形路徑以相同體積量被切除，不足部分則沿其變形路徑以相同體積進行補償。Although cold - formed rectangular tube - steel column is favorable to industrialization of mass production, the cold forming process increase the yield point and tensile strength, at the same time the cold forming process decrease the ductile behavior, so it ’ s necessary to research the seismic behavior of cold - formed rectangular tube - steel column for architecture structure
冷彎矩形鋼管雖然可以實現大批量工廠化生產，但冷彎矩形鋼管在冷成型過程提高了材料的屈服點和抗拉強度同時降低了延性，因而冷彎矩形鋼管作為柱材在建築結構抗震中的應用有待進一步研究。This paper discussed a new coated fabric used for membrane, which is made by multi axial warp - knitted fabric of the pet fiber reinforcing pvc sheets
研究以滌綸經編多軸向織物為基布、表面復合聚氯乙烯壓延薄膜製成的新型可作膜結構材料使用的織物增強柔性復合材料的拉伸性能。Therefore, drawbead is employed together with bhf to control the drawing process, and several typical layouts of drawbead are analyzed and compared via fea ( finite element analysis ), with the most effective one then being applied to stamping experiments
因此，文中採用拉延筋和壓邊力來共同控制拉延成形，並通過有限元分析比較了幾種典型的拉延筋布置方案，選擇其中最有效的一種進行試沖試驗。分享友人