专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4785399A Shaping geometric objects by cumulative translational sweeps 失效
标题翻译：通过累积翻译扫描来形成几何对象
公开(公告)号：US4785399A
公开(公告)日：1988-11-15
申请号：US21388
申请日：1987-03-03
申请人： Roger C. Evans , George M. Koppelman , Vadakkedathu T. Rajan
发明人： Roger C. Evans , George M. Koppelman , Vadakkedathu T. Rajan
IPC分类号： G06F17/50 , B29C67/00 , G06T17/20 , G06F1/00
CPC分类号： B29C67/007 , B29C67/0088 , G06T17/20
摘要： Cumulative translational sweeps are used to shape geometric objects in a computer model, and they permit display of the resulting changes in shape in the object modelled, and control of processes involving the object modelled. If the geometric object is polyhedral, the cumulative translational sweeps, by creating additional facets, effect selective rounding along model edges and around model vertices. This permits computer modelling of the growth of layers, encompassing in addition to flat surface growth, growth with rounding around corners and over obstacles. Such growth occurs in the manufacture of semiconductors. Modelling a change in a solid structure in stages of growth (or shrinking) and of rounding, as might take place during processing of integrated circuits is achieved by controlled sweep sequences that sweep the structure a finite number of times in accordance with a rayset and stipulated parameters of shape, balance, convexity/concavity, degree of faceting, and memory limitation. The cumulative translational sweep (CTS) is applied in combination with Boolean operations to simulate growth and shrinking over the boundary regions of polyhedral models. By creating additional facets, it effects stipulated selective or global rounding effects along model edges and around model vertices. Such sweeps are examined in terms of Minkowski sums--of the geometric objects that are swept, with structuring geometric shapes that are convex polyhedron from the zonotope subclass of the mathematical family of objects known as polytopes.

2. 发明授权

US5402351A Model generation system having closed-loop extrusion nozzle positioning 失效
标题翻译：具有闭环挤出喷嘴定位的模型生成系统
公开(公告)号：US5402351A
公开(公告)日：1995-03-28
申请号：US183512
申请日：1994-01-18
申请人： John S. Batchelder , Huntington W. Curtis , Douglas S. Goodman , Franklin Gracer , Robert R. Jackson , George M. Koppelman , John D. Mackay
发明人： John S. Batchelder , Huntington W. Curtis , Douglas S. Goodman , Franklin Gracer , Robert R. Jackson , George M. Koppelman , John D. Mackay
IPC分类号： B29C41/36 , B29C67/00 , G05B19/4099 , G06F17/50 , G06F15/46
CPC分类号： B29C67/0055 , B29C41/36 , B29C47/0866 , B29C67/0092 , G05B19/4099 , B29C47/0019 , G05B2219/37572 , G05B2219/49015 , Y02P90/265
摘要： Disclosed are methods and apparatus for fabricating a three-dimensional object in accordance with a computer-generated definition of the object that is stored within a memory. A method includes the steps of (a) evaluating the stored definition of the object to locate any un-supported features of the object; in response to locating an un-supported feature, (b) defining a support structure for the un-supported feature; (c) generating a fabrication tool movement list expressive of movements required by a fabrication tool to fabricate the object and any defined support structures; and (d) translating the fabrication tool in accordance with the generated fabrication tool movement list to fabricate the object and any defined support structures. The step of translating includes the steps of, generating a feedback signal that is indicative of at least one characteristic of a most recently fabricated portion of the object; and monitoring the feedback signal to detect a deviation of at least a location of the most recently fabricated portion of the object from a corresponding location as expressed in the associated portion of the fabrication tool movement list. Also disclosed are methods and apparatus for anti-aliasing aliased surface features of the object, representing the object definition in a vector format, generating a bit-mapped representation of the object, and an analysis of the definition of the object to identify and subsequently compensate for a region of the object that has a potential to retain heat during fabrication.
摘要翻译：公开了根据计算机生成的存储在存储器内的对象的定义来制造三维物体的方法和装置。一种方法包括以下步骤：（a）评估存储的对象的定义以定位对象的任何不支持的特征; 响应于定位未支撑的特征，（b）为所述不支持的特征定义支撑结构; （c）产生制造工具运动列表，其表达制造工具所需的运动以制造物体和任何限定的支撑结构; 以及（d）根据生成的制造工具移动列表翻译制造工具以制造物体和任何定义的支撑结构。转换步骤包括以下步骤：产生指示物体的最近制造的部分的至少一个特征的反馈信号; 以及监视所述反馈信号以检测所述物体的最近制造的部分的至少一个位置与所述制造工具运动列表的相关联部分中表示的对应位置的偏差。还公开了用于消除对象的混叠表面特征的方法和装置，以矢量格式表示对象定义，生成对象的位映射表示，以及对对象的定义的分析以识别和随后的补偿对于在制造期间具有保持热量的潜力的物体的区域。

3. 发明授权

US5303141A Model generation system having closed-loop extrusion nozzle positioning 失效
标题翻译：具有闭环挤出喷嘴定位的模型生成系统
公开(公告)号：US5303141A
公开(公告)日：1994-04-12
申请号：US34180
申请日：1993-03-22
申请人： John S. Batchelder , Huntington W. Curtis , Douglas S. Goodman , Franklin Gracer , Robert R. Jackson , George M. Koppelman , John D. Mackay
发明人： John S. Batchelder , Huntington W. Curtis , Douglas S. Goodman , Franklin Gracer , Robert R. Jackson , George M. Koppelman , John D. Mackay
IPC分类号： B29C41/36 , B29C67/00 , G05B19/4099 , G06F17/50 , G06F15/46
CPC分类号： B29C67/0055 , B29C41/36 , B29C47/0866 , B29C67/0092 , G05B19/4099 , B29C47/0019 , G05B2219/37572 , G05B2219/49015 , Y02P90/265
摘要： Apparatus and method for fabricating a three-dimensional object in accordance with a CAD-generated specification of the object. A closed-loop extrusion system (10) includes a nozzle (12) for extruding a material, such as a hot melt adhesive; apparatus (14, 18, 46) for controllably positioning the nozzle in accordance with the specification; and a sensor (60) for generating a feedback signal that is indicative of at least one characteristic of a most recently extruded portion of the material. Visual and non-visual feedback sensors may be employed, including optical sensors, infrared emission sensors, and proximity detection sensors. The specification of the object is converted to a bit-mapped representation thereof to improve accuracy relative to vector-based representations. Methods for determining a need for supporting structures and anti-aliasing features and for integrating the structures and features into the object specification are also disclosed.
摘要翻译：根据CAD生成的对象规范制造三维物体的装置和方法。闭环挤出系统（10）包括用于挤出材料的喷嘴（12），例如热熔粘合剂; 用于根据说明书可控地定位喷嘴的装置（14,18,46）; 以及用于产生指示材料的最近挤出部分的至少一个特性的反馈信号的传感器（60）。可以采用视觉和非视觉反馈传感器，包括光学传感器，红外发射传感器和接近检测传感器。将对象的规范转换为其位映射表示，以提高相对于基于矢量的表示的精度。还公开了用于确定对支撑结构和抗混叠特征的需求以及用于将结构和特征集成到对象规范中的方法。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式