1) fourangle bending
四角弯曲
1.
twoangle and-fourangle bending.
介绍了先进的单角、双角和四角弯曲方式以及模具结构。
2) four point bending
四点弯曲
1.
Interracial fracture properties of the stainless steel and aluminum bimetal are analyzed with the method of four point bending test,and the interface crack and the interface fracture structure are analyzed with SEM.
采用四点弯曲的试验研究方法,对爆炸焊接不锈钢-铝复层材料界面断裂性能进行了研究,采用扫描电子显微镜对界面裂纹与断口形貌进行观察分析。
2.
A new method for elastic modulus measurement of thin films—four point bending method is presented in this paper.
提出了一种新的薄膜弹性模量测定方法──四点弯曲法 。
3) four-point bending
四点弯曲
1.
With the aid of the analytical methods of composite mechanics,a layered shear-lag model is established to investigate the multiple cracking of reinforced concrete(RC) beam reinforced with carbon fiber sheets under four-point bending.
借鉴复合材料力学的分析方法,建立一种分层剪滞模型,研究了碳纤维片材加固钢筋混凝土梁在四点弯曲载荷作用下的多重开裂破坏,求得了梁纯弯段下部钢筋保护层中的最大裂缝宽度和裂缝密度与施加载荷和碳纤维片材的粘贴层数之间的定量关系,计算结果与现有实验值较吻合。
2.
Based on the study method for mechanics of composite materials,a layering model is established for the redistribution of the stress of reinforced concrete beam strengthened by unidirectional aramid fiber sheet with crack under four-point bending load,and then the distributions of stress and displacement of all the sub-layers are obtained.
借鉴复合材料力学的研究方法,对四点弯曲荷载作用下含裂缝的单向芳纶纤维片材加固钢筋混凝土梁的应力重新分布建立一种分层模型,从而获得了各子层的应力或位移分布。
3.
In order to solve these problems,a four-point bending fatigue test system Cooper NU-14 was used to evaluate the fatigue performance of asphalt mixtures.
鉴于其在加载方式与路面实际受力状态方面存在较大差别、实际开裂模式与理论开裂位置经常不一致,笔者尝试使用一种四点弯曲疲劳试验系统(即Cooper NU-14试验系统)评价沥青混合料的疲劳性能。
4) bending angle
弯曲角度
1.
Based on the proposed model with known temperature distributions,the bending angle induced by the laser can be calculated.
基于传统固体力学的平衡方程和相容性关系,同时考虑了板料激光成形中加热阶段的塑性变形和冷却过程的弹性变形,利用已有的激光扫描温度分布模型,建立了板料成形弯曲角度的解析模型。
2.
Special incline is not usually main function plane of pressing, its external shape size and bending angle are not dimensioned directly in 2D part drawing;the data needs calculating.
特殊斜面在冲压件中通常不是主要功用面,在二维零件图中,一般不会直接标注特殊斜面的外形尺寸及其弯曲角度,需要自行设法计算得到数据。
3.
In the experiment it has been found that: when the thickness and length of the sheet metal is invariable, the bending angle increases with the sheet width increasing, and it tends to a fixed value when the sheet width is large enough.
当板厚、板长一定时采用不同宽度的1Cr18Ni9Ti薄板进行等离子电弧弯曲成形的试验,试验发现:随着薄板宽度的增长,薄板弯曲角度增大,当板宽的增大到一定值时,薄板弯曲角度趋于定值。
5) bending angle
弯曲角
1.
This paper analyses the influence factors of a critical bending angle of cold bend structural steel under the influence of modulus of elasticity, legged length, and waisted width and thickness of the plate, limits of strength and elasticity.
计算、分析了带村弹性模量、槽钢腿部长度、腰部宽度、厚度、强度极限和弹性极限对冷弯型槽钢临界弯曲角的影响，其结果对提高产品质量、降低生产成本有参考价值。
2.
The effects of process parameters(laser power,scanning velocity,number of scannings) and work piece geometry(specimen width) on the bending angle were investigated,then the experimental phenomenon was analyzed.
实验结果表明,采用CO2连续激光可以对硼硅酸盐玻璃薄片进行弯曲加工,弯曲角度可达24°以上。
3.
By using Monte-Carlo method,defining two dimensionless quantities including relative mean value deviation factor and variation factor,the variability of calculation results for bending angles is researched,in the conditions of the geometric parameters,material thermophysical properties parameters and laser machining parameters occurring stochastic variability.
采用Monte-Carlo方法,定义相对均差系数、变异系数两个无量纲量,研究当几何参数、材料热物性参数、激光加工参数存在随机变异时,金属激光弯曲成形过程弯曲角计算结果的变异性。
6) bend angle
弯曲角
1.
Research on machine vision system for real-time identifying the bend angle of sheet metal;
基于机器视觉的板料弯曲角实时识别系统研究
2.
The effects of the mixer bend angles β,the mixer to lobe cross sectional area ratio λ and the cross sectional area ratio σ of the secondary inlet to lobe on ejection ratio φ was studied.
将圆排波瓣喷管配以不同的弯曲混合管组成引射混合器 ,实验研究了弯曲混合管的几何参数 ,试验结果表明 :当弯曲角β=40°时 ,弯曲混合管的引射流量比φ与同样直径的圆柱混合管相当 ;当β>40°时 ,弯曲混合管的引射流量比φ相比于同样直径的圆柱混合管有较大的下降 ,φ随β的增加下降很快 ;φ随混合管截面比λ的增加先增大后下降 ,虽然峰值小于圆柱混合管的最大引射流量比 ,但是峰值对应的值却近似等同于圆柱混合管的截面比 ;φ随次流进口截面比 σ的增加而接近线性增大。
补充资料：弯曲工艺的概念及弯曲件
1．弯曲工艺：是根据零件形状的需要，通过模具和压力机把毛坯弯成一定角度，一定形状工件的冲压工艺方法。
2．弯曲成形工艺在工业生产中的应用：应用相当广泛，如汽车上很多履盖件，小汽车的柜架构件，摩托车上把柄，脚支架，单车上的支架构件，把柄，小的如门扣，夹子（铁夹）等。
弯曲的基本原理：以V形板料弯曲件的弯曲变形为例进行说明。其过程为：
1． 凸模运动接触板料（毛坯）由于凸,凹模不同的接触点力作用而产生弯矩， 在弯矩作用下发生弹性变形，产生弯曲。
2． 随着凸模继续下行，毛坯与凹模表面逐渐靠近接触，使弯曲半径及弯曲力臂均随之减少，毛坯与凹模接触点由凹模两肩移到凹模两斜面上。（塑变开始阶段）。
3．随着凸模的继续下行，毛坯两端接触凸模斜面开始弯曲。（回弯曲阶段）。
4．压平阶段，随着凸凹模间的间隙不断变小，板料在凸凹模间被压平。
5． 校正阶段，当行程终了，对板料进行校正，使其圆角直边与凸模全部贴合而成所需的形状。
弯曲变形的特点： 弯曲变形的特点是：板料在弯曲变形区内的曲率发生变化，即
弯 曲半径发生变化。从弯曲断面可划分为三个区：拉伸区、压缩区和中性层。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条