搜索结果: 16-30 共查到“知识库 工程图学”相关记录94条 . 查询时间(3.281 秒)
S-CODE: A Subdivision Based Coding System for CAD Models
Subdivision surfaces Surface fitting Approximation Data compression
2009/8/19
A large scale polygon models are often used to approximately represent 3D CAD models in Digital Engineering environment such as DMU (Digital Mockups) and network based collaborative design. However, t...
An Algorithm for Splitting a Box by a Loop and Its Applications in Manufacturing
Tool design Rapid Prototyping (RP) Parting surface Parting line Parting direction
2009/8/19
During the design of dies and molds, the cavity of the object is obtained by subtracting it from a surrounding rectangular block. This box is subsequently split into two halves by the parting surface....
Generalized Cylinder based on Linear Interpolation by Direction Map
Generalized cylinder Linear interpolation by direction map Developable surface
2009/8/19
We propose two algorithms to generate (1) polygonal meshes and (2) developable surface patches for generalized cylinders defined by contours of discrete curves. To solve the contour blending problem o...
Design of a Feature-based Multi-viewpoint Design Automation System
Computer-aided design Feature-based design Viewpoint dependency
2009/8/19
Viewpoint-dependent feature-based modelling in computer-aided design is developed for the purposes of supporting engineering design representation and automation. The approach of this paper uses a com...
Analysis of Skin Movements with Respect to Bone Motions using MR Images
Skin movement Motion analysis MR images 3D surface reconstruction
2009/8/19
This paper describes a novel experiment that measures skin movement with respect to the flexional motion of a hand. The study was based on MR images in conjunction with CAD techniques. The MR images o...
Application of Multi-Frontal Method in Collaborative Engineering Environment
Finite elements CAE CORBA STEP JAVA Distributed engineering Multi-Frontal
2009/8/19
The growth of the World Wide Web and the advances in high-speed network access have greatly changed existing CAD/CAE environment. The WWW has enabled us to share various distributed product data and t...
Using Features as the Knowledge Carrier for Cross Company Collaboration and Change Management - A design methodology for compressing lead-time from plastic part design to mold making
Product design Feature-based Knowledge management Mold design Design change management
2009/8/19
This paper presents a methodology in which the knowledge of design intents and change requests is communicated unambiguously cross collaboration partners through features. The domain of application is...
Adaptive Slicing with Curvature Considerations
Rapid Prototyping Laminated Object Manufacturing Adaptive Slicing Direct Slicing
2009/8/19
In this paper, first order slice height calculation in Laminated Object Manufacturing (LOM) of free form surfaces is done with two different considerations: that a) the cutter trajectory is oriented i...
Design of Heat-Activated Reversible Integral Attachments for Product-Embedded Disassembly
design for disassembly snap-fit joints compliant mechanisms thermal actuators
2009/8/19
Disassembly is a fundamental process needed for component reuse and material recycling in all assembled products. Integral attachments, also known as “snap” fits, are favored fastening means in design...
Hybrid Representations for Enveloping Modeling in Gearing
CAD gearing B-rep F-rep enveloping
2009/8/19
Hybrid method of representing geometric entities as combination of boundary (B-rep) and functional (F-rep) representations is presented which can be used as a basis of solid modeling kernel. It contai...
Modeling Cutter Swept Angle at Cornering Cut
Intelligent design cavity layout design injection mould design case-based reasoning
2009/8/19
When milling concave corners, cutter load increases momentarily and fluctuates severely due to concentration and uneven distribution of material stock. This abrupt change of cutter load produces undes...
Parallel Generation of NC Tool Paths for Subdivision Surfaces
Subdivision surface NC tool path S-Buffer
2009/8/19
The subdivision surface is the limit of recursively refined polyhedral mesh. It is quite intuitive that the multi-resolution feature can be utilized to simplify generation of NC (Numerical Control) to...
Direct Slicing with Optimum Number of Contour Points
Direct Slicing Adaptive Slicing Laminated Object Manufacturing LOM RP Optimisation
2009/8/19
In this work, a rational procedure has been formulated for the selection of points approximating slice contours cut in LOM (Laminated Object manufacturing) with first order approximation. It is sugges...
Applications in Virtual Manufacturing
discrete event simulation discrete simulation events visualization 3D animation
2009/8/19
This paper presents a new approach to create 3D visualization from discrete simulation results. This approach connects discrete event simulation directly to 3D animation with its novel methods that an...
Estimating Recursion Depth for Loop Subdivision
Loop surface subdivision recursion depth arbitrary topology bound
2009/8/19
In this paper, an exponential bound of the distance between a Loop subdivision surface and its control mesh is derived based on the topological structure of the control mesh. The exponential bound is ...