公开(公告)号：US07574339B2

公开(公告)日：2009-08-11

申请号：US11523232

申请日：2006-09-19

申请人： Lawrence J. Lukis ,  Yuri Dreizin

发明人： Lawrence J. Lukis ,  Yuri Dreizin

IPC分类号： G06G7/50

CPC分类号： G06F17/505

摘要： The present invention is a method and system for simulating fluid flow in a cavity, having relevance to the modeling of viscous flows within thin cavities of complex shapes in which heat exchange with the cavity walls may be a governing factor, as in injection molding of plastic parts. Its automated discretization scheme, in which the model cavity is partitioned into macrocells, each macrocell having substantial contact areas with the model cavity walls, eliminates the need for time consuming and expensive manual model configuration required by some modeling methods. Because of the simplicity of the discretization, models based on the invention are less demanding on computer resources then conventional finite element methods, and execute more quickly. A key innovation of the method is a function characterizing the shape of a macrocell that appears in a coefficient in equations governing the flow. As a consequence of the improvements offered by the invention, molds for complex parts can be fabricated more rapidly, with the resulting parts having high quality.

摘要翻译： 本发明是用于模拟空腔中的流体流动的方法和系统，其与复杂形状的薄腔内的粘性流的建模相关，其中与空腔壁的热交换可以是调节因子，如在塑料的注射成型 部分。 其自动离散化方案，其中模型腔被分成宏小区，每个宏小区具有与模型空腔壁的实质接触区域，消除了对一些建模方法所需的耗时和昂贵的手动模型配置的需要。 由于离散化的简单性，基于本发明的模型对于传统的有限元方法对计算机资源的要求较低，并且执行得更快。 该方法的一个关键创新是表征在控制流量的方程式中的系数中出现的宏单元的形状的函数。 作为本发明提供的改进的结果，可以更快速地制造用于复杂部件的模具，所得到的部件具有高质量。

公开(公告)号：US20080126047A1

公开(公告)日：2008-05-29

申请号：US11523232

申请日：2006-09-19

申请人： Lawrence J. Lukis ,  Yuri Dreizin

发明人： Lawrence J. Lukis ,  Yuri Dreizin

IPC分类号： G06G7/48

CPC分类号： G06F17/505

摘要： The present invention is a method and system for simulating fluid flow in a cavity, having relevance to the modeling of viscous flows within thin cavities of complex shapes in which heat exchange with the cavity walls may be a governing factor, as in injection molding of plastic parts. Its automated discretization scheme, in which the model cavity is partitioned into macrocells, each macrocell having substantial contact areas with the model cavity walls, eliminates the need for time consuming and expensive manual model configuration required by some modeling methods. Because of the simplicity of the discretization, models based on the invention are less demanding on computer resources then conventional finite element methods, and execute more quickly. A key innovation of the method is a function characterizing the shape of a macrocell that appears in a coefficient in equations governing the flow. As a consequence of the improvements offered by the invention, molds for complex parts can be fabricated more rapidly, with the resulting parts having high quality.

摘要翻译： 本发明是用于模拟空腔中的流体流动的方法和系统，其与复杂形状的薄腔内的粘性流的建模相关，其中与空腔壁的热交换可以是调节因子，如在塑料的注射成型 部分。 其自动离散化方案，其中模型腔被分成宏小区，每个宏小区具有与模型空腔壁的实质接触区域，消除了对一些建模方法所需的耗时和昂贵的手动模型配置的需要。 由于离散化的简单性，基于本发明的模型对于传统的有限元方法对计算机资源的要求较低，并且执行得更快。 该方法的一个关键创新是表征在控制流量的方程式中的系数中出现的宏单元的形状的函数。 作为本发明提供的改进的结果，可以更快速地制造用于复杂部件的模具，所得到的部件具有高质量。

公开(公告)号：US20050096780A1

公开(公告)日：2005-05-05

申请号：US10970130

申请日：2004-10-21

申请人： Lawrence Lukis ,  Yuri Dreizin ,  John Gilbert

发明人： Lawrence Lukis ,  Yuri Dreizin ,  John Gilbert

IPC分类号： B22C19/04 ,  B29C33/38 ,  G06Q30/00 ,  B29C39/00

CPC分类号： B22C19/04 ,  B29C33/3835 ,  G06Q30/06

摘要： Automated, custom mold manufacture for a part begins by creating and storing a collection of information of standard tool geometries and surface profiles machinable by each of the standard tool geometries. A customer sends a CAD file for the part to be molded to the system. The system assesses the CAD file to determine various pieces of mold manufacturing information. One or more acceptability criteria are applied to the part, such as whether the part can be manufactured in a two-piece, straight-pull mold, and whether the mold can by CNC machined out of aluminum. If not, the system sends a file to the customer graphically indicating which portions of the part need modification to be manufacturable. The system provides the customer with a quotation form, that allows the customer to select several parameters, such as number of cavities, surface finish and material, which an independent of the shape of the part. The quotation module then provides the customer with the cost to manufacture the mold or a number of parts. The quotation is based in part upon mold manufacturing time as automatically assessed from the part drawings and based in part on the independent parameters selected by the customer. The customer's part is geometrically assessed so the system automatically selects appropriate tools and computes tool paths for mold manufacture. In addition to the part cavity, the system preferably assesses the parting line, the shutoff surfaces, the ejection pins and the runners and gates for the mold. The preferred system then generates CNC machining instructions to manufacture the mold, and the mold is manufactured in accordance with these instructions.

摘要翻译： 零件的自动定制模具制造开始于创建和存储标准工具几何和表面轮廓信息的集合，这些信息可通过每种标准工具几何形状加工。 一个客户发送一个CAD文件，用于要模制到该系统的零件。 该系统评估CAD文件以确定各种模具制造信息。 一个或多个可接受性标准被应用于零件，例如该零件是否可以以两件式的直拉模具制造，以及模具是否可以通过铝加工而成。 如果没有，则系统以图形方式向客户发送文件，指示部件的哪些部分需要修改才能制造。 该系统为客户提供了一种报价单，允许客户选择几个参数，如空腔数量，表面光洁度和材料，独立于零件的形状。 报价模块然后为客户提供制造模具或多个零件的成本。 报价部分基于模具制造时间，部分由零件图纸自动评估，部分依据客户选择的独立参数。 客户的部件进行几何评估，以便系统自动选择合适的工具并计算出模具制造的刀具路径。 除了部分空腔之外，系统还优选地评估分模线，关闭表面，弹出销和用于模具的流道和浇口。 优选的系统然后产生CNC加工说明以制造模具，并且模具根据这些说明书制造。