通过实验确认的三辊卷板机上辊位置的分析和经验模型英文翻译

1、analytical and empirical modeling of top roller position for three-roller cylindrical bending of plates and its experimental verification the charact type of level eristic of level adjust below three rollers rolling machine in thisinvestigation is as follows.using the adjust,the end can be bendedwit

2、hout turn around and the whole process of plate coiling including entering、center adjusting、pre-bending、coiling、cylinder proofread can be completedcontinuously;due to whole hydraulic pressure driving protocol,the structure wassimplified,and speed and pressure was easily controlled in the process of

3、platecoiling;the setup of the center adjusting and the equip of supporting,the preciseand quality of plate coiling was improved;owing to the simplified structure,theoperation and maintenance is easy to carried out.keyword: bending machine；the work rolls；mechanical analysis；the transmission system1、r

4、eported research on the forming of cylindrical shells mostly discusses the modeling and analysis of the process. reported the geometrical analysis of the single pass elasto-plastic bending of beams on the three-roller pyramid benders by assuming triangular moment distribution between the rollers. de

5、veloped model for the bending force and bending moment was based on the contact point shift between the plate and top roll from the vertical centerline of the top roll. described closed loop shape control of three-roller bending process. the presented scheme accomplishes the shape control by measuri

6、ng the loaded shape, the loaded moment and effective beam rigidity of the material in real time. discussed the distribution of curvature and bending moment in accordance with the displacement and rotation of the rolls by simulating the deformation of work piece with u-shaped cross-section in a three

7、-roller bending process. they reported the relationship between the bending moment and the curvature of the work piece by elementary method, which was further used to build up a process model combining the geometries for three-roller bending process. 2、developed process model was further applied to

8、the real time control system to obtained products with constant and continuously varying curvature. reported a process model for use in simulation of the manufacturing of cylindrical shells from the plates, which require sequential bending, by incorporating the prior bend history. they modeled the p

9、rocess with series of overlapping two-dimensional three point bends, where overlap includes the plastic zone from the previous bends. reported the mathematical model for determining the plate internal bending resistance at the top roll contact for the multi-pass four-roll thin plate bending operatio

10、ns along with the principle mechanisms of bending process for single pass and multi-pass bending. have reported a kinematics based symmetric approach to determine the region of the plate to be rolled, in order to form smoothly curved plates. developed the analytical model to estimate the top roller

11、position as a function of desired radius of curvature, for multiple pass three-roller forming of cylinders, considering real material behavior and change of youngs modulus of elasticity under deformation and shows that the springback is larger than the springback calculated with constant e. literatu

12、re review reveals that only limited studies are available on the continuous three-roller bending of plates.3、with reported analytical models, it is difficult to find the top roller position explicitly as a function of the desired radius of curvature and hence it requires solving the set of equations

13、 by nonlinear programming. use of the close loop shape control or adaptive control or cnc control system can improve the accuracy and the consistency of the process but acquisition and maintenance of such a system is costly and may not be affordable to the small scale to medium scale fabricators. pu

14、rpose of the present analysis is to develop the model for prediction of the top roller position as a function of the desired radius of curvature explicitly for cylindrical shell bending. development of the model is based on analytical and empirical approach. empirical model is developed based on the

15、 top roller position versus loaded radius of curvature plots, which is obtained geometrically for a set of data of center distance between bottom rollers and bottom roller radius.4、conclusiondeveloped analytical and empirical models were verified with the experiments on three-roller cylindrical bend

16、ing. following important conclusions were derived out of the reported work:(1) analytical model based on concept 3, simplifies the calculation procedure for the machine-setting parameters as it expresses the top roller position as an explicit function of desired radius of curvature.(2) agreement of

17、empirical results with that of the experiments and analytical results based on concept 3 proves the correctness of the procedure.(3) for the small to medium scale fabricators, where the volume of production does not permit the acquisition of automated close loop control systems, developed models can

18、 be proved to be simple tool for the first hand estimation of machine setting parameters for required product dimensions.(4) consideration of effect of initial strain and change of modulus of elasticity during deformation on spring back, in analytical/empirical model will further improve the accurac

19、y of prediction of top roller position.(5) further, empirical model based on the experimental loaded curvature distribution between roller supports would consider the top roller-plate contact point shift and will lead to more accurate prediction of top roller position.通过实验确认的三辊卷板机上辊位置的分析和经验模型本文研究的水平

20、对称式卷板机特点如下：采用水平下调式，即下辊可作水平移动，可实现不用调头便可预弯端头，使进料、对中、预弯、卷圆、矫圆整个卷板过程连续完成，利于提高生产效率，降低工人劳动强度；设置板料对中装置和支承辊装置，利于提高卷板精度和卷板质量；采用全液压驱动，使设备结构简化，便于卷板过程中的速度和压力控制，起停、换向灵活，运行平稳，操作方便；结构简单，便于操作和维护维修，符合现场技术工人的操作和维修水平，高效实用。关键词：卷板机；工作辊；受力分析；传动系统1、本文是研究形成的圆柱壳的大多是讨论的建模和分析的过程。通过几何分析对三辊对称式卷板机的弹塑性弯曲，假设三角力矩分配之间的轧辊。发展模式的弯曲力和弯矩

21、的基础上，上辊通过在两下辊对称中央作上下移动，而两下辊的左、右旋转。所描述的闭环板形控制的三辊弯曲的过程。由提出的计划，完成板形控制测量加载的形状，加载和有效刚度的材料。 在讨论的分布曲率和弯矩在按照位移和旋转的辊模拟变形的工件与u形截面的过程中和他们之间的关系，弯矩和曲率的工件由初等方法。这是进一步用来建立相结合的几何构型为三辊弯曲的过程。2、对现有的控制系统的产品模型进一步开发，以获得与常数和连续变曲率。模型的使用在模拟制造圆柱壳从板，这就需要连续弯曲，这就得到了事先的弯曲资料。他们用重叠包括来自事先的弯曲的塑料的地域的连续的交叠处理二维的三点弯曲做模型程序了。通过数学模型，确定上辊对板内部弯曲阻力，多通过四辊薄板弯曲行动随的原则，弯曲的过程中为单一通过和多次通过弯曲。基于对称的做法，以确定该地区的板块推出