drawing coefficient 中文意思是什麼
drawing coefficient
解釋
拉伸系數- drawing : n 1 延引，牽引；引誘。2 抽簽；拈鬮。3 【機械工程】拔絲；沖壓成形。4 描畫，制圖；圖，圖形；素描；...
- coefficient : adj. 共同作用的。n. 1. 共同作用；協同因素。2. 【數，物】系數，率；程度。
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In the paper, the finite element simulation software dynafrom is applied to analyze the affect of different blank holder during the forming process of laminose stepped tubular part, predict the possible defects such as wrinkle and break, obtain the rational style of blank holder avoiding the occur of defects and determine the rational configuration of die. the forming affect of thin - wall shallow stepped tubular part is analyzed when using different lubricate condition ( friction coefficient ). by this method, the relationship between friction coefficient and drawing depth of laminose stepped tubular part is obtained
本文利用有限元模擬軟體dynafrom分析了不同類型的壓邊圈對薄壁階梯筒形件成形過程的影響規律，預測了採用不同類型壓邊圈時可能出現的成形缺陷如起皺和拉裂，獲得了防止缺陷產生的合理壓邊圈形式，確定了合理的模具結構形式；分析了不同的潤滑條件（摩擦系數）對薄板階梯筒形件成形的影響，獲得摩擦系數與薄板階梯筒形件的拉深深度的關系；分析了階梯筒形件成形過程中的不同階段的應力應變分佈、毛坯材料厚度變化情況，並獲得了階梯階梯筒形件能一次拉深成形的條件。 -
The discussing process follows the steps below : first, suppose the system ( 1 ) has only one finite singular point ( 0, 0 ). then we can assume b50 = 0, which special direction is determined by equation g ( 0 ) - 0, introduce poincare transformation to discuss infinite singular points, according to the coefficient conditions, list all possible infinite singular points and special directions, judging their type, drawing out all kinds of phase portraits
本文主要內容為：一、假設系統（ 1 ）只有唯一的有限遠奇點（ 0 ， 0 ） ，則不妨設b _ （ 50 ） = 0 ，其特殊方向由示性方程g （ ） = 0給出，引進poincare變換研究無窮遠奇點，再根據各定理中的系數條件，列出系統所有可能的無窮遠奇點和特殊方向，並判斷其類型，由此畫出系統的各種可能的全局相圖。 -
Drawing piece unfold size is one basic condition under the calculation on coefficient, number of drawing, handbooks or books of press are not given, practice press production, die designer designs drawing die by experience calculation, after testing, according to deformation, state, defect shape of testing blank, shape and unfold size is revising, finally, unfold size and shape of blank are determined, designing period is longer, cost of die and work piece is to raise, economic benefit is to reduce
拉深件展開尺寸是拉深可行性分析中計算拉深系數與拉深次數的前提條件，現有沖壓手冊或教材對于復雜拉深件的展開尺寸計算尚未論述。復雜拉深件的沖壓生產中，模具設計者憑經驗估計拉深可行性，設計製造拉深模進行反復試壓，根據試壓件的形變狀態，缺陷形貌，制定坯料展開尺寸和形狀，周期較長，因而生產成本高，經濟效益不佳。 -
Design of the sensor for measuring friction coefficient in deep drawing
一種測量板料拉深摩擦因數的傳感器設計 -
Neural network based prediction of frictional coefficient in metal forming deep drawing
基於神經網路的板料拉深成形摩擦系數預測 -
Based on energy theory, wrinkling criterion in deep drawing for axisymmetric parts is derived to take geometry parameters, friction coefficient, material properties, and the law of critical blank - holder force ( bhf ) of side wall wrinkling in the constraint condition of initial wrinkling into account
從能量平衡原理出發，通過對屈服準則的線性化處理，推導了考慮幾何參數、摩擦系數和材料性能參數、板材皺曲時約束條件的軸對稱拉深成形過程中側壁起皺臨界壓邊力的變化規律，給出了皺曲判據。 -
In order to effectively use the vacant space beside the passenger train paths in the train running diagram of mixed passenger and freight lines and draw more freight train paths to improve the carrying capacity, the essay analyzes the reasonable drawing plan for freight train paths beside single passenger train arid two passenger trains respectively on the double tracked section with automatic blocking system according to the principle of minimal additional removal time and on the basis of the calculation method of removal coefficient table
摘要為了在客貨共線運行圖中有效利用旅客列車運行線兩側的空檔，盡可能多地鋪畫貨物列車運行線，以提高區段通過能力，在扣除系數表格計演算法的基礎上，按照附加扣除時間最少的原則，分析了在雙線自動閉塞區段單列旅客列車和2列旅客列車兩側貨物列車運行線的合理鋪畫方案。 -
In this dissertation, we study the global topological classification and coefficient conditions of the plane homogeneous fifth polynomial differential system the main techniques used in this thesis includes the methods of the global structure and coefficient conditions of the plane homogeneous quadratic and cubic system mentioned in the paper [ 1 ] of professor ye yanqian, and the paper [ 2 ] of professor li xue min, also includes the idea to high - order critical point of professor zhang zhifen, lu yulin and han yuliang etc. due to the degree of polynomial in the right of equal - sign crease, when we discuss the global structure, the more special directions, the more difficulty in drawing phase portraits of this system
本文主要討論一類平面齊五次多項式微分系統的全局拓撲結構及系數條件。借鑒了文獻[ 1 ]葉彥謙教授對平面齊二次系統的全局結構及系數條件和文獻[ 2 ]李學敏教授對平面齊三次系統的全局結構及系數條件的研究方法，同時綜合了張芷芬教授、陸毓麟教授、韓玉良教授等人對高次奇點的研究思想進行討論。這樣，由於等號右邊多項式次數的增加，討論系統的全局結構時，可能出現的特殊方向就會增加，在作全局相圖時，難度增大了。 -
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。 -
Based on calculation method on unfold size and piece form, theory analysis and research are given on ellipse, circle tube, box as equal - high, irregular, unequal - high, irregular piece, process and condition on possibility of drawing are introduced, through calculation coefficient, number of drawing, drawing testing dies are made, results are given, it is similar to calculation method, in the same time, complex drawing presswork is planed, to avoid wrinkle, critical in drawing process. in this paper, die designing is introduced based on complex drawing unfold size calculation, press center is automatic calculated, apartments of press tools are calculated too with material mechanic production process and press form are better, period of die designing is to reduced, and cost of product is lower
對基於復雜拉深件展開尺寸計算的模具設計也作了詳細的論述，指出了現有復雜拉深件模具設計製造程序的不合理性，本文在復雜拉深件展開尺寸基礎上自動生成沖裁中心、沖裁周長，運用材料力學中桿件強度及抗失穩條件，實現對沖壓模具參數的自動計算，簡化了沖壓模具彈性元件、打料裝置的設計過程，給出了沖壓模具結構設計流程，使得模具材料核算，製造過程，沖壓方式更趨合理，縮短了模具設計製造周期，降低了產品生產成本。 -
The sixth chapter end up this paper, it draws a conclusion : the input - output mathematics model can be improved through mathematics research to the input and output method, the input - output coefficient can be simultaneously amended ; computers can be used to draw up the real - time input and output forms, internet can be used to send message immediately, and work out the fact that the time of drawing - up is backward 擄 it makes the drawing - up of the input and output forms more significant
第六章是論文的結束部分。論文的結論是:通過數學方法對投入產出法進行改進研究，可以優化投入產出數學模型，修正適時編制投入產出表時的投入和產出系數;利用計算機編制投入表，再實現計算機網路報送，可以解決長期以來編制時間滯后的問題，使投入產出表的編制更具有現實意義。 -
The design of tunnel lining structure is related with the drainage and waterproofing system, lining structure shape, the permeability coefficient of grouting loop and so on, which should be carried out through special research and calculation. it is inappropriate by adopting present standard drawing briefly. ( 9 ) with the action of external
本論文提出的以堵為主「控制排水」原則和考慮外水荷載作用的鐵路隧道襯砌結構設計等定性原則和定量方法，盡管是初步的、探討性的，但這些原則和方法本身對改進和完善我國現有鐵路隧道襯砌結構設計方法，提高我國隧道設計水平具有重要意義。
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