啮合导向旋转双螺杆三维实体造型研究

从啮合异向旋转双螺杆相对运动原理及其截面形状的几何造型方程入手，借助CAD的VBA三维造型及计算分析功能，分析研究了螺杆理论端面曲线所生成的三维实体模型与实际螺杆的差异，找出其中的关系，方便有效地使螺杆的三维实体造型与实际螺杆相符，从而使螺杆三维实体造型更具实际应用价值。     

基于Pro/E的锥形双螺杆三维造型设计

借助Pro/E现有的功能进行锥形双螺杆的实体造型和动态装配设计,可使锥形螺杆三维实体造型过程简化,其结果可以为同类产品的三维造型提供参考。     

双螺杆三维实体造型的研究

本文根据双螺杆横截面几何造型方程，运用ＭＤＴ软件包，实现了同向和异向旋转双螺杆的三维实体造型。它可用来检验两螺杆的啮合状态，为双螺杆几何特性参数的合理选择和科学设计提供理论依据。     

异向旋转锥形双螺杆三维造型方法研究

采用端面曲线旋转和模拟机加工法两种方式对锥形双螺杆进行造型,从造型后法向螺棱宽度与设计参数的吻合度和两螺杆装配后螺棱侧隙的均匀性两方面对造型方法的准确性进行了评价,并根据造型过程分析了两种造型方法的不同适用范围。结果表明,两种造型方法均不产生干涉;前者通过对螺棱顶角计算方法进行改进后,不仅得到了与设计参数一致的法向螺棱宽度,还具有更均匀的螺棱侧隙,较适于仿真模拟计算的建模和轴向齿廓形状较简单的锥形双螺杆的造型,后者更适于构建轴向齿廓形状更加复杂的螺杆实体。     

基于SolidWorks与CAXA联合的轮胎三维造型

以215/60R16规格轮胎造型为例,简要介绍采用SolidWorks与CAXA联合进行轮胎三维实体造型主要步骤以及造型过程中需要注意的问题。在造型过程中充分发挥了CAXA软件的工程图绘制的优势,从而避免了SolidWorks中复杂的轮胎曲线草图绘制,提高了轮胎三维实体造型设计的速度。     

–SOLIDWORKS软件在轮胎花纹设计中的应用

以195R14C规格轮胎设计为例,介绍了SOLIDWORKS软件在轮胎三维设计中的应用。SOLIDWORKS软件具有较强的三维实体和曲面造型功能,SOLIDWORKS提供的草图设计、曲面造型、实体造型和制图功能均很强大,可以满足轮胎设计的要求,可给客户提供直观的花纹样式,对我院参与国际竞争、提高企业形象和促进与轮胎制造厂商的技术交流均可起到较好作用。     

用Catia简单实体功能进行载重轮胎花纹造型

介绍在Catia软件中使用凹槽、拔模和倒圆角等简单实体造型功能快速方便进行载重轮胎花纹三维造型的方法,在花纹不是很复杂或者造型精度不是很高的情况下能够得到满意的花纹三维模型。该方法同样也适合其他三维机械设计软件。     

异向旋转双螺杆几何造型的研究

作者根据异向旋转双螺杆啮合原理，应用高级实体造型技术，讨论了异向旋转平行、锥形双螺杆三维实体造型，以指导异向旋转双螺杆几何参数的选择和设计。     

三维实体塑件造型系统的研制

介绍了三维实体塑件造型系统的研制，实现了塑件三维造型整个过程，且能方便迅速地生成标准三维图纸。同时对从体模型向面模型的转换进行了探索，从而实现了ＣＡＤ／ＣＡＥ／ＣＡＭ一体化集成。     

ZZ2转子的三维造型与有限元结构分析

使用三维CAD软件SolidWorks对ZZ2转子进行三维实体造型,利用SolidWorks中的有限元分析模块COSMOS对ZZ2转子在混炼过程中的受力情况进行模拟分析,对转子的应力、位移和安全系数等进行模拟计算,提高了转子受力分析的准确性,给转子设计提供参考,提高设计效率。     

锥形双螺杆三维实体造型的研究及其开发应用

通过对锥形双螺杆基本结构及几何参数的分析，参照啮合异向双螺杆端面曲线的形成原理，借助CAD的VBA三维造型及计算分析功能，分析研究了锥形双螺杆各个功能段的构型特征及其造型创建时的程序驱动，并通过Visual Basic 6．0与AutoCAD的动态链接，完成了对AutoCAD绘图命令的参数化控制，方便有效地实现了锥形双螺杆三维实体造型和二维工程图绘制的人机交互。     

基于SolidWorks API的异向双螺杆的参数化设计

研究了异向双螺杆的端面曲线的生成和修正方法,在此基础上实现了基于SolidWorks API的异向双螺杆参数化设计和三维建模,为进一步进行有限元分析、计算机模拟奠定了基础。使异向双螺杆三维建模更简便,提升了工作效率。     

Numerical study of twin-screw extruders by three-dimensional flow analysis—development of analysis technique and evaluation of mixing performance for full flight screws

We have developed a method for predicting the three-dimensional flow field in the melt conveying zone in counter-rotating and co-rotating twin-screw extruders. We applied this technique to the full flight screws with thin flight width and open C-shaped channels in both rotating type extruders having the same screw configurations. We compared the details of velocity and stress fields, the flow rates of transportation, and various kinds of leakage flows for both rotating type extruders. Also, we obtained the spatial distribution of tracer particles and residence time distribution using a numerical tracer experiment. The flow rate in the transport direction in the co-rotating twin-screw was larger than that in the counter-rotating twin-screw, and this suggested that the latter has higher transport performance when the screws have thin flight width and open C-shaped channels as used in this study. As for the distributive mixing, it was found that the co-rotating twin-screw excels in the area of fluid rearrangement between the two screws and distribution in the rotational direction, while the counter-rotating twin-screw has the desirable characteristic of wide distribution in the axial direction. With regard to dispersive mixing, there was no considerable difference between calculated stress fields in both rotating type extruders.     

双螺杆挤出中聚合物熔体混合状态的统计学分析

利用POLYFLOW对啮合同向和异向双螺杆挤出机中的三维等温流场进行了数值模拟，在获得大量粒子轨迹的基础上，运用统计学指标-分配尺度和分散指数对聚合物熔体在两种挤出机中的混合状态进行了定量描述。     

A new twin-screw press design for oil extraction of dehulled sunflower seeds

Transport of material in a single-screw press depends mainly on friction between the material and the barrel’s inner surface and the screw surface during screw rotation. Thus, a solid core component, like seed hulls, is often necessary to produce the fraction. This sometimes causes excess frictional heat, large energy consumption and oil deterioration. Furthermore, if single-screw presses are not configured with breaker bars or other special equipment, they provide inadequate crushing and mixing. A twin-screw oil press can be expected to solve these problems because of the higher transportation force, similar to a gear pump, and better mixing and crushing at the twin-screw interface. A twin-screw press (screw diameter=136 mm, length/diameter=6.5, screw speed 15–100 rpm, feed rate=50–150 kg/h) was designed with partially intermeshing and counter-rotating screws and was tested on dehulled sunflower seed. The results were compared to a single-screw lab-scale press. Dehulled sun-flower seed (wt, 6.0%; oil, 58.6%) without pretreatments (crushing or cooking) gave 93.6% oil recovery with the twin-screw press, in contrast to 20% oil recovery with the single-screw press. The oil expressed with a twin-screw press had less foreign material than the oil from the single-screw press. Other properties of the oil were also good. Energy consumption of the twin-screw press was more efficient. All results suggested that oil production from dehulled sunflower seed with a twin-screw press is highly efficient.     

啮合异向双螺杆挤出过程轴向循环流道三维流场分析——轴向循环流场分析(Ⅲ)

介绍了作者在啮合异向双螺杆某一轴向位置设置一非啮合段 (且该段其中一根螺杆是反向输送元件 ) ,从而将轴向循环流动的概念引入到啮合异向双螺杆挤出过程中 ,并利用ANSYS有限元分析软件对啮合异向双螺杆挤出过程轴向循环流道中的非牛顿流体等温流动进行的三维模拟分析 ;在得出速度场和压力场的基础上 ,对剪切速率、剪切应力及剪切粘度进行了模拟 ,并将各模拟结果与未引入轴向循环段的啮合异向双螺杆挤出过程常规螺纹元件流道的模拟结果进行了比较。     

第九届亚太国际塑料橡胶工业展览会特别报道

介绍并评述了第九届亚太国际塑料橡胶工业展览会展示的部分新材料、新技术、新产品、新设备，包括9层吹塑薄膜、精密微型挤出、三螺杆混炼挤出机、异向混炼型双螺杆挤出机和木塑复合材料等，以供业界人士参考。     

非啮合异向旋转双螺杆挤出过程可视化研究（Ⅰ）──固体输送模型化

文章介绍了作者借助于机筒顶部装了若干玻璃视窗的非啮合异向旋转双螺杆挤出机得出的可视化研究结果，包括挤出过程的可视化现象以及固体输送的模型化。