Information Modeling of Conceptual Process Planning Integrated With Conceptual Design

2000 ◽  
Author(s):  
Shaw C. Feng ◽  
Eugene Y. Song
Keyword(s):  
Process Planning ◽  
Computer Aided Design ◽  
Information Modeling ◽  
Current Status ◽  
Manufacturing Cost ◽  
Object Model ◽  
Activity Model ◽  
Computer Aided Process Planning ◽  
Model Sets ◽  
Computer Aided

Abstract Conceptual process planning is a key activity for designers to evaluate manufacturability and manufacturing cost and time in the early product development stage. Since major manufacturing cost is determined in early design, it is critical to be able to assess manufacturability and cost as early as possible in the design process. The integration between process planning and design is critical to enable these analyses. A literature review of the current status of Computer-Aided Design (CAD) and Computer-Aided Process Planning (CAPP) software technologies reveals the lack of interface standards to enable the integration of these systems. In order to develop interface standards, information models have to be first developed to define the interfaces. An initial information model for conceptual process planning has been developed. This model includes an activity model and an object model for manufacturing process selection, resource selection, and cost and time estimation. The activity model sets the context in which the objects are used for information sharing and exchange. The object model defines classes used in conceptual process planning. The main purpose of developing this model is to initiate the development of standard interface specifications that are necessary for design and process planning integration.

Information Modeling of Conceptual Design Integrated With Process Planning

2000 ◽  
Author(s):  
Shaw C. Feng ◽  
Eugene Y. Song
Keyword(s):  
Conceptual Design ◽  
Design Process ◽  
Process Planning ◽  
Model Development ◽  
Basic Structure ◽  
Information Modeling ◽  
Manufacturing Cost ◽  
Object Model ◽  
Activity Model ◽  
Model Sets

Abstract Information modeling is critical to the integration of conceptual design and process planning. An information model for conceptual design is provided in this paper. Conceptual design is a key activity in early product development. It determines product functions, form, and the basic structure. Major manufacturing cost is committed in early conceptual design process. The model presented in this paper includes an activity model for the conceptual design process and an object model for classes used in conceptual design. The activity model sets the context in which the objects are defined and used. The object model describes the data and functions used in conceptual design and integration with process planning. The main purpose of the model development is to initiate standard interface specifications that are necessary for design and process planning integration.

Common Product/Process Models for Integrating Manufacturing Simulation, Process Planning and Computer Aided Design

1996 ◽  
Author(s):  
Robert V. E. Bryant ◽  
Thomas J. Laliberty
Keyword(s):  
Process Planning ◽  
Collaborative Design ◽  
Computer Aided Design ◽  
Automatic Generation ◽  
Process Models ◽  
Virtual Enterprises ◽  
Computer Aided Process Planning ◽  
Manufacturing Simulation ◽  
Computer Aided ◽  
Aided Design

Abstract Integrated Product Process Development tools which minimize downstream manufacturing risk at the earliest design stages and avoid costly Design-Build-Test cycles are essential to achieving product profitability and meeting market windows. This paper summarizes initial work performed towards the development of the Manufacturing Simulation Driver (MSD) system which will demonstrate the automatic generation and execution of distributed manufacturing simulations. These simulation models are produced by Computer Aided Process Planning (CAPP) software tools which reason about Computer Aided Design (CAD) product models and produce manufacturing “scripts” from a process and resource model of a manufacturing facility. This capability will enable emerging virtual enterprises conducting collaborative design and manufacturing to simulate and prove out the manufacturing cycle of a product prior to launching production ramp-up. 1

A Framework for Integrated Computer-Aided Design, Process Planning and Manufacturing Systems Engineering for Powertrain Machining

2004 ◽  
Author(s):  
Derek Yip-Hoi ◽  
Jianming Li ◽  
Liang Zhou ◽  
Wencai Wang ◽  
Madhumati Ramesh ◽  
...  
Keyword(s):  
Design Process ◽  
Process Planning ◽  
Systems Engineering ◽  
Computer Aided Design ◽  
Manufacturing Systems ◽  
Manufacturing System ◽  
Value Added ◽  
Computer Aided Process Planning ◽  
Computer Aided ◽  
Aided Design

Machined powertrain components are a subset of machined parts that introduce unique and difficult problems to product design, process planning and manufacturing system design for the automotive industry. They are complex, high value-added components that must be produced at large volumes to stringent quality standards. Accordingly product development cycles are typically long. Integrated computer-aided approaches are thus desirable for reducing this time and helping manufacturing engineers design the best process and specify the optimal manufacturing system configuration. This paper presents a framework for integrating Computer-Aided Design (CAD), Computer-Aided Process Planning (CAPP) and Computer-Aided Manufacturing Systems Engineering (CAE-MS) for producing machined powertrain components. It describes the key components of this framework and in some cases details of the methods and technologies adopted for their realization. This solution is based upon a feature-centric philosophy. This stands in contrast to the product-variant approach that has been common practice in this industry.

Programmable Support Functions to Assist Process Planning for Aeronautical Parts Manufacturing

2014 ◽  
Author(s):  
Nikolaos A. Fountas ◽  
Constantinos I. Stergiou ◽  
Nikolaos M. Vaxevanidis
Keyword(s):  
Process Planning ◽  
Computer Aided Design ◽  
Shop Floor ◽  
Support Functions ◽  
Computer Aided Process Planning ◽  
Software Application ◽  
Process Plans ◽  
Computer Aided ◽  
Technical Instructions ◽  
Parts Manufacturing

Despite the fast development and the continuous evolution of computer-aided systems for product design, analysis and manufacturing, an unlinked gap appears between the interfaces of computer-aided design (CAD) and computer-aided process planning (CAPP) modules. Various CAPP systems have been built to address this problem and forward a “passage” to link the design phase and the planning of manufacturing processes; hence, providing precise technical instructions in the shop-floor. To support the manufacturing trends and contribute to the research efforts for the realization of precise, reliable and efficient process plans, a set of programmable support functions are presented in the form of an object-oriented software application that enable process planners to produce accurate process plans for aircraft parts and components.

Representation and reasoning in computer aided process planning

1997 ◽  
Vol 211 (6) ◽  
pp. 473-485 ◽  
Author(s):  
C A McMahon ◽  
D R Cox ◽  
J H Sims Williams ◽  
J A Scott
Keyword(s):  
Process Planning ◽  
Computer Aided Design ◽  
Recursive Algorithm ◽  
Geometric Model ◽  
Search Space ◽  
Boundary Representation ◽  
Automatic Process ◽  
Computer Aided Process Planning ◽  
Topological Relationships ◽  
Computer Aided

This article is concerned with part representation and reasoning algorithms for automatic process planning in CADCAM (computer aided design and manufacture). Process planning involves the translation of a part description into instructions for a sequence of operations for the manufacture of the part. Part representations in CADCAM are reviewed, and a hierarchical representation is introduced which describes parts as the set-theoretic union of positive (protrusion) features, with the set-theoretic union of negative (depression) features subtracted. The model information hierarchy also incorporates topological relationships among features (adjacency, ownership and intersection), tolerances and links to a boundary representation (B-rep) geometric model. The hierarchical part representation is used as the basis for a reasoning scheme that uses topological relationships between features to restrict the search space of operation sequences. A recursive algorithm produces candidate operation sequences that are then ranked by applying manufacturing heuristics in a process called machining regularization. The representation approach is illustrated by an example, and possible extensions to the scheme are briefly discussed.

Study on Three-Dimension Computer Aided Process Planning System

2011 ◽  
Vol 121-126 ◽  
pp. 1316-1320
Author(s):  
Lei Chen ◽  
Ming Ran Deng
Keyword(s):  
Process Planning ◽  
Computer Aided Design ◽  
Process Model ◽  
Planning System ◽  
Three Dimension ◽  
Process Data ◽  
Computer Aided Process Planning ◽  
Cad System ◽  
Computer Aided ◽  
Working Procedure

Aiming at the problem of process data update and working procedure model, the three-dimension CAPP (Computer Aided Process Planning) based on three-dimension CAD (Computer Aided Design) is proposed. The core of the system is the process model that is used to transfer data between CAPP and CAD system. This system can solve the problem of two-dimension CAPP based on parameter feature modeling of three-dimension CAD and has been applied to some aviation enterprises in china.

scholarly journals A Genetic Crow Search Algorithm for Optimization of Operation Sequencing in Process Planning

2021 ◽  
Vol 11 (5) ◽  
pp. 1981
Author(s):  
Mica Djurdjev ◽  
Robert Cep ◽  
Dejan Lukic ◽  
Aco Antic ◽  
Branislav Popovic ◽  
...  
Keyword(s):  
Process Planning ◽  
Computer Aided Design ◽  
Search Algorithm ◽  
Combinatorial Problem ◽  
Optimization Criterion ◽  
Total Production ◽  
Operation Sequencing ◽  
Computer Aided Process Planning ◽  
Sequencing Problem ◽  
Computer Aided

Computer-aided process planning represents the main link between computer-aided design and computer-aided manufacturing. One of the crucial tasks in computer-aided process planning is an operation sequencing problem. In order to find the optimal process plan, operation sequencing problem is formulated as an NP hard combinatorial problem. To solve this problem, a novel genetic crow search approach (GCSA) is proposed in this paper. The traditional CSA is improved by employing genetic strategies such as tournament selection, three-string crossover, shift and resource mutation. Moreover, adaptive crossover and mutation probability coefficients were introduced to improve local and global search abilities of the GCSA. Operation precedence graph is adopted to represent precedence relationships among features and vector representation is used to manipulate the data in the Matlab environment. A new nearest mechanism strategy is added to ensure that elements of machines, tools and tool approach direction (TAD) vectors are integer values. Repair strategy to handle precedence constraints is adopted after initialization and shift mutation steps. Minimization of total production cost is used as the optimization criterion to evaluate process plans. To verify the performance of the GCSA, two case studies with different dimensions are carried out and comparisons with traditional and some modern algorithms from the literature are discussed. The results show that the GCSA performs well for operation sequencing problem in computer-aided process planning.

Feature-Based 3D Process Planning for MEMS Fabrication

2014 ◽  
Vol 8 (3) ◽  
pp. 406-419 ◽  
Author(s):  
Satoshi Kanai ◽  
◽  
Takayuki Shibata ◽  
Takahiro Kawashima ◽  
Keyword(s):  
Process Planning ◽  
Computer Aided Design ◽  
Mems Devices ◽  
Micro Electro Mechanical Systems ◽  
Computer Aided Process Planning ◽  
Device Model ◽  
Computer Aided ◽  
Estimation Function ◽  
Geometry Estimation ◽  
Multiple Materials

With the fast growth of the market forMEMS (Micro-Electro-Mechanical Systems) devices, Computer-Aided Design (CAD) and Computer-Aided Process Planning (CAPP) systems for MEMS are essential for the appropriate division of labor between MEMS design and fabrication. Although several CAD systems for MEMS devices are commercially available, CAPP systems for MEMS are still underdeveloped, and few systems have been investigated. The purpose of this study is to prototype a CAPP system for MEMS for non-expert MEMS designers. MEMS device geometry, a complex layered structure made of multiple materials, is represented as a solid model called a device model. The system has twomain functions. In processextraction function, all feasible fabrication processes of the device are exhaustively derived from the device model using 3D fabrication features as clues. In manufacturable-geometry-estimation function, the expected 3D geometry of the device that will actually be fabricated by the derived process, which might differ from the original device model, is estimated. Process emulation using a commercial emulator and examination by expert researchers confirm that the derived process plans and the expected 3D geometries of the device are feasible and plausible.

Sign in / Sign up

Export Citation Format

Share Document