pressing direction 中文意思是什麼
pressing direction
解釋
沖壓方向-
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。 -
For example, when magnetic material being pressed, magnetic domain, direction and strength of spontaneous magnetization will vary. this phenomenon is called effect of pressing magnet. whichever rearrangement of magnetic domain or direction change of spontaneous magnetization will induces extra shape change of material
如對鐵磁材料施加應力時，往往會導致磁疇、自發磁化方向和強度發生變化，這一現象稱之為壓磁效應，由於得益於壓磁效應的作用，不論是磁疇重新排列還是自發磁化方向發生變化都會引起材料額外的形變，因此在一定應力的作用下鐵磁材料能產生非彈性變形。 -
Firstly, the comparation study between the wedge pressing and the contour forging has shown that the transverse deforming initiated from the surface of the preforms. when the superficies reached the moulding wall, the deforming moved downwards as the high - direction deforming increased, till the moulding chamber was full of stock ; the transverse deforming of the moulding pressing stock initiated from the center of the stock then surned into a drum - type. the distribution of the density and hardness of the high - direction indicated that the wedge pressing acquired a better ability of pressing penetration
首先對比研究了楔形壓制工藝與模壓緻密化工藝，發現楔壓坯料的橫向變形從上表層開始，當上表面與模壁接觸后，隨著高向變形量的增加逐步向下移動，直至坯料充滿模腔;模壓坯料的橫向變形從坯料中間開始，形成鼓形。高向的密度、硬度分佈表明楔壓比模壓具有更好的壓透能力。 -
Secondly, the effect of transverse deforming on the property of the wedge pressing was studied. the results showed that : the wedge pressing stock with the transverse deforming amount of 10 % acquired the best performance. the highest density got the biggest rate of slope while with the amount of 30 % the curve was more some special structure and performance as following : the large porosities was crushed into small or linear ones with the high - direction deformation amount of 20 % ; as the increasing of the high - direction deforming, the particles got a further deforming, the porosities got a further crushing, the small porosities were mergered by the large ones and the former then disappeared ; when the amound reached 60 %, the quantity of the porosities would obviously decrease which made the materials compact, the microstructure more uniform and the density and hardness curves more horizontal, the relative desity could reach 99. 7 %, the tensile strength b of the as - compacted samples reached 408mpa with the yield strength s teached 289mpa and the elongation percentage reached 13. 6 %. in addition, the microstructure of the wedge pressing stock under the pressing temperectureof 450 was uniform, the porosities and the boundries of the grains basically disappeared and the conjunction between particles was great
採用雙向楔形壓制，大尺寸噴射沉積5a06鋁合金楔壓坯的組織和性能變化具有如下特點:當高向變形量為20 %時，大的孔洞變形破碎為小的孔洞，或呈線狀孔;隨著高向變形量的增加，顆粒進一步變形，孔洞進一步破碎，大孔「吞併」小孔，小孔塌陷並逐步消失;當高向變形量達到60 %時，孔洞量大為減少，材料基本緻密，組織趨于均勻，楔壓坯料的密度、硬度變化曲線接近水平線，坯料的相對密度達99 . 7 % ，抗拉強度_ b = 408mpa ，屈服強度_ （ 0 . 2 ） = 289mpa ，延伸率= 13 . 6 % ;對比其它的壓制溫度，在450楔形壓制的坯料組織均勻，孔洞及顆粒邊界基本消失，顆粒之間冶金結合良好。 -
Compared with those of as - sprayed ring, hardness and tension strength of area near processing face are increased by 45 % and 40 % respectively. friction mechanical performance of the ring is improved at large extent, and especially the wearing amount is merely 13 % of as - sprayed rings. after dual - direction cyclic pressing, the pore - closed state and the distributing of density and hardness are nearly identical in every part of ring. the friction mechanical property is close to that of single - direction - cyclic - press ring
靠近壓力加工面部位，硬度較沉積坯提高了45 % ，拉伸強度較沉積坯提高了40 % 。雙向楔壓后孔洞閉合、密度硬度分佈都比較均勻。單向楔壓后，用壓力加工面作為摩擦面， al - 20 % si / sicp復合材料的摩擦磨損性能得到大幅度提高，尤其磨損量為楔壓前的13 % 。 -
In the present dissertation, the densification mechanisms and the structure controlling of various transient layers of w - mo - ti flier - plates with graded wave impedance were mainly investigated. wholly dense w - mo - ti flier - plates were then prepared by powder stacking and hot - pressing. in order to achieve a required wave impedance profile and a quasi - continuous change along the thickness direction, the ratios of components in transient layers were well adjusted
論文採用粉末冶金方法，詳細研究了w - mo - ti體系梯度飛片材料中各組元的燒結緻密化機理與控制方法，以精細控制不同配比的混合粉末的鋪填方式與鋪填結構來減小梯度飛片材料內部波阻抗值的躍變幅度，成功制備出波阻抗按指定分佈特徵沿厚度方向準連續變化的、波阻抗面平行度高並且整體緻密的w - mo - ti體系梯度飛片。 -
( 2 ) for the cyclic pressing technics, the thickness of densified layer of ring was studied, and the rules which the technics must follow had been investigated, and the influence of parameter on densification results had also been investigated. according to the theory of rolling, the conclusion of thickness of densification layer had been drawn for the dual - direction cyclic pressing. the term that decreased height of one stage and distance of one step advancing had been researched
（ 2 ）對楔壓壓透深度規律進行了初步探索，同時對楔壓過程參數（單道次壓下量和楔壓步進量）所要遵循的規律以及楔壓工藝參數（壓制方式、壓下量和壓制溫度）對坯件性能的影響進行了研究。 -
Using this analytic solution, a numeric integral can be obtained. a series of conclusions can be abstracted from the result of numeric integral : 1. the direction of response is not always downwards, sometimes maybe upwards, so the pavement may get flex drawing stress and flex pressing stress to the moving load ; 2
利用此解析解進行數值化計算，分析數值結果可知：彎沉並非總是向下，也可能出現向上的位移，這表明道面板在移動荷載作用下受到了彎拉和彎壓的交變應力作用。 -
The main conclusions are drawn as follows : ( 1 ) for spray - forming ring of little thickness, densification results including friction mechanical property were investigated. after single - direction cyclic pressing, in the region near processing face, cavities close well and mechanical performances are better than those of region far from processing face
本論文的主要研究內容和研究結論如下: （ 1 ）對單、雙向楔壓工藝加工厚度較小的噴射沉積al - 20 % si / sicp復合材料環件的緻密化效果以及緻密化加工后環件的摩擦性能進行了研究。
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