Research on Situated Reconstitution of Non-Manifold Polyhedral from Function-to-Form Mapping

2013 ◽  
Vol 774-776 ◽  
pp. 1766-1769
Author(s):  
Zhi Gang Xu ◽  
Zi Xiang Li ◽  
Jin Wang ◽  
Tao Tao Liu ◽  
Chun Po Sun
Keyword(s):  
Design Automation ◽  
Algebraic Reasoning ◽  
Top Down ◽  
Automation Systems ◽  
Geometric Elements

Situated reconstitution is proposed in this paper to cope with un-manifold polyhedral from the function to form mapping processes. Specifically the situated reconstitution is not simply re-arrangement of geometric elements, mainly face entities in the un-manifold polyhedral, rather it needs a complex geometric/algebraic reasoning to reconstitute a manifold object, novel mathematical as well as AI techniques are introduced in this paper, several tools are developed to testify the proposed situated reconstitution in the “top-down” design automation systems.

Multi-tool processing in the conditions of complex automation of technical processes

2021 ◽  
pp. 24-30
Author(s):  
A.B. Istomin ◽  
I.N. Gemba ◽  
I.V. Lizunov
Keyword(s):  
Production System ◽  
Design Automation ◽  
Complex Problem ◽  
Machine Building ◽  
Production Cycle ◽  
Elastic Deformations ◽  
Automation Systems ◽  
General Complex ◽  
Complex Automation ◽  
Production Preparation

The article analyzes the influence of errors from elastic deformations on the accuracy of processing in the conditions of complex automation. Different variants of multi-tool processing are considered: parallel processing, when different tools are alternately, one after the other, involved in the processing of the workpiece surfaces, and parallel-sequential processing, when different surfaces of the workpiece are processed simultaneously by several tools located in the working position. Design automation in machine-building production is part of the complex problem of automation of engineering work in all areas of the functioning of a modern production system. Therefore, when creating design automation systems, its connections in the general complex of automation of engineering activities in the production cycle should be taken into account. In general, the automation of the engineer's work is task planning, design and technological preparation of production, and management of the production system. The choice of favorable cutting modes for multi-tool processing is a difficult task, since, along with taking into account the features of each individual tool, it is necessary to make a general analysis of the entire setup, i.e. the set of tools used on the machine, and the distribution of processing transitions among them. Machine-building production is currently characterized by the desire to constantly update the range of released products. The requirements of multi-product manufacture can be met under the condition of its automation, which covers both the automation of production preparation and management. The article provides recommendations for reducing the error from elastic deformations in the conditions of complex automation. English version ofthe article is available at URL: https://panor.ru/articles/multi-tool-machining-in-complex-process-automation/65225.html

Limitations of Parametric Operators for Supporting Systematic Design

2005 ◽  
Author(s):  
Bernhard Bettig ◽  
Vikram Bapat ◽  
Balaji Bharadwaj
Keyword(s):  
Variational Methods ◽  
Design Automation ◽  
Manufacturing Industry ◽  
Systematic Design ◽  
Synthesis System ◽  
Inherent Limitation ◽  
Design Synthesis ◽  
Automation Systems ◽  
Current Design ◽  
Design Requirements

Computers are being used extensively in the manufacturing industry to design and analyze products. In spite of the power of existing CAD systems and potential power of current Design Automation systems, we believe that they possess an inherent limitation that keeps them from aligning with and fully supporting the design process. Specifically, all of these systems are based on using parametric operators to generate valid designs. This paper examines the limitations of parametric operators for CAD and design automation and shows how “variational” methods could be used. An approach using variational methods is compared with traditional CAD and design automation methods. The paper also proposes a language of objects and relationships to represent design requirements. This work is a step towards realizing an interactive design synthesis system that can represent and satisfy design requirements.

Overview of the Development and Enforcement of Process-Driven Manufacturability Constraints in Product Design

2019 ◽  
Author(s):  
Albert E. Patterson ◽  
Yong Hoon Lee ◽  
James T. Allison
Keyword(s):  
Product Design ◽  
Design Automation ◽  
Design For Manufacturing ◽  
Top Down ◽  
Specific Process ◽  
Micro Scale ◽  
Macro Scale ◽  
Simple Mass ◽  
Common Problems ◽  
Scale Design

Abstract Design-for-manufacturing (DFM) concepts have traditionally focused on design simplification; this is highly effective for relatively simple, mass-produced products, but tends to be too restrictive for more complex designs. Effort in recent decades has focused on creating methods for generating and imposing specific, process-derived technical manufacturability constraints for some common problems. This paper presents an overview of the problem and its design implications, a discussion of the nature of the manufacturability constraints, and a survey of the existing approaches and methods for generating/enforcing the minimally restrictive manufacturability constraints within several design domains. Four major design perspectives were included in the study, including the system design (top-down), the product design (bottom-up), the manufacturing process-dominant approach (specific process required), and the part-redesign approach. Manufacturability constraints within four design levels were explored as well, ranging from macro-scale to sub-micro-scale design. Very little previous work was found in many areas but it is clear from the existing literature that the problem and a general solution to it are very important to explore further in future DFM and design automation work.

A top-down method for the derivation of metrics for the assessment of design automation potential

2019 ◽  
Vol 31 (2) ◽  
pp. 69-99 ◽  
Author(s):  
Eugen Rigger ◽  
Thomas Vosgien ◽  
Kristina Shea ◽  
Tino Stankovic
Keyword(s):  
Design Automation ◽  
Top Down

Decomposition and Reconstitution Based Fixturing Planning Automation

1999 ◽  
Author(s):  
K. Huang ◽  
Y. Rong
Keyword(s):  
Design Process ◽  
Concurrent Engineering ◽  
Design Automation ◽  
Planning System ◽  
Fixture Design ◽  
Application Process ◽  
Top Down ◽  
Fixture Planning ◽  
Product Design Process ◽  
Effective Product

Abstract Fixturing planning has become a focus in concurrent engineering which is required for efficient and effective product design, process planning and fixture design. In the context of DFM in concurrent engineering, a new Decomposition and Reconstitution (D&R) Based Fixture Planning Automation is developed as a top-down approach for fixture design automation. Decomposition and reconstitution problems are discussed for building a prototype fixture planning system. Finally a practical example is given to show its application process and effectiveness.

Empirical Studies for Evaluation and Investigation of a New Knowledge Representation Structure in Design Automation

2002 ◽  
Author(s):  
Joshua D. Summers ◽  
Jami J. Shah
Keyword(s):  
Knowledge Representation ◽  
Design Automation ◽  
Empirical Studies ◽  
Research Trends ◽  
Complexity Measures ◽  
Multiple Representation ◽  
Automation Systems ◽  
New Knowledge ◽  
Representation Structure

The introduction of a new knowledge representation structure, the design exemplar, in design automation systems dictates the need for developing a set of evaluative and investigative measures. Current research trends have focused on offering implemented systems as validations of new structures or using algorithmic and runtime complexity measures as evaluations. A set of objective and quantitative measures are introduced for evaluating the design exemplar. Based upon these measures, a series of empirical studies are executed that preliminarily demonstrate the breadth and depth of the potential for using the design exemplar as a knowledge representation structure. These measures may also be used as the basis for conducting other studies to evaluate independently multiple representation structures in design automation.

How to Build Flexible Design Automation Systems for Manufacturability Analysis of the Draw Bending of Aluminum Profiles

2011 ◽  
Vol 133 (6) ◽  
Author(s):  
Joel Johansson
Keyword(s):  
Design Automation ◽  
Single Step ◽  
Prototype System ◽  
Manufacturing Companies ◽  
Rotary Draw Bending ◽  
Forming Process ◽  
Automation Systems ◽  
Draw Bending ◽  
Production Preparation ◽  
Aluminum Profiles

Manufacturing companies continually need to develop and produce products faster, cheaper, and of better quality to meet requirements from customers and investors. One key factor in meeting these requirements is the efficiency of the product development and the production preparation processes. Design automation is a powerful tool for increasing the efficiency of these two processes. The benefits of automating manufacturability analyses, a part of the production preparation process, are shortened lead time, improved product performance, and ultimately decreased cost. Further, the automation is beneficial as it increases the ability to adapt products to new specifications since production preparations are done in few or in a single step. Extruded sections of aluminum (aluminum profiles) have many advantages, especially for light weight structural members, and are used in many products. Many times a secondary forming process, such as bending, is required when these materials are used. The intention of the work presented in this article has been to investigate how to automate the process of finding manufacturing limits of the rotary draw bending of aluminum profiles with focus on the system architecture needed to make such systems flexible. Finding the forming limits of an aluminum profile is not a trivial task. This is because the limits depend not only on the profile shape but also on the layout of the tool. Hence, simulations have to be done to evaluate different designs. A prototype system was developed to explore what was needed to automate simulation of the rotary draw bending of aluminum profiles, and subsequently, analyze the simulated production outcome with respect to wrinkling and developed length.

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