A Knowledge-Based System for Manufacturability Assessment of Deep Drawn Sheet Metal Parts

2011 ◽  
Vol 473 ◽  
pp. 749-756 ◽  
Author(s):  
Vishal Naranje ◽  
Shailendra Kumar
Keyword(s):  
Sheet Metal ◽  
Low Cost ◽  
Metal Parts ◽  
Knowledge Based System ◽  
Sheet Metal Parts ◽  
Manufacturing Operations ◽  
Knowledge Based ◽  
Sources Of Knowledge ◽  
Geometrical Features ◽  
System Output

In this paper a knowledge based system (KBS) for checking manufacturability of deep drawn sheet metal parts is described. For the development of proposed system technical knowledge acquired from different sources of knowledge acquisition is framed in the form of production rules of ‘IF-THEN’ variety and then coded using AutoLISP language. For consultation, the user loads the system into the prompt area of AutoCAD. The proposed system generates friendly prompt eliciting from the user for data pertaining to the job at hand. The system output includes recommendations on suitability of geometrical features of the part for required manufacturing operations. The system is flexible and its knowledge base can be extended and modified as old manufacturing facilities are discarded or newer ones are acquired in a particular enterprise. Effectiveness of the proposed system is demonstrated by taking an example of an industrial sheet metal part. The low cost of implementation of proposed system makes it affordable for small and medium scale sheet metal industries.

A Knowledge Based System for Process Planning of Axisymmetric Deep Drawn Parts

2013 ◽  
Vol 549 ◽  
pp. 239-246 ◽  
Author(s):  
Vishal Naranje ◽  
Shailendra Kumar
Keyword(s):  
Sheet Metal ◽  
Process Planning ◽  
Low Cost ◽  
Knowledge Based System ◽  
Sheet Metal Parts ◽  
Part Geometry ◽  
Knowledge Based ◽  
Sources Of Knowledge ◽  
Blank Size ◽  
Different Sources

This paper describes a knowledge based system (KBS) developed for process planning of axisymmetric deep drawn sheet metal parts. The proposed system is structured into three modules. For the development of proposed system technical knowledge is acquired from different sources of knowledge acquisition and it is represented by using IF-THEN rules. Rules are coded using AutoLISP language and user interface is created using Visual Basic 6. The proposed system automatically models the part geometry in the drawing editor of AutoCAD, calculates blank size, selects the necessary process parameters required for production of deep drawn parts and generates process sequence. The system is flexible because its knowledge base can be extended and modified as old manufacturing facilities are discarded or newer ones are acquired in a particular enterprise. The suitability of proposed system is demonstrated by taking an example of industrial deep drawn sheet metal part. As the system can be implemented on a PC having AutoCAD software and therefore its low cost of implementation makes it affordable for small and medium scale sheet metal industries.

A Low Cost Knowledge Based System Framework for Design of Bending Die

2013 ◽  
Vol 549 ◽  
pp. 284-291 ◽  
Author(s):  
Deepak Panghal ◽  
Shailendra Kumar
Keyword(s):  
Sheet Metal ◽  
Low Cost ◽  
Visual Basic ◽  
Die Design ◽  
Small Scale ◽  
Production Rules ◽  
System Framework ◽  
Knowledge Based System ◽  
Sheet Metal Parts ◽  
Knowledge Based

This paper presents a low cost knowledge based system (KBS) framework for design of bending die. Considerations for development of KBS are discussed at some length. The proposed framework divides the task of development of expert system into different modules for major activities of bending die design. The procedure of development of KBS modules is also described at length. Production rules for each module are recommended to be coded in the AutoLISP language and designed to be loaded into the prompt area of AutoCAD or through user interface created using Visual Basic. Each module of the proposed framework is user interactive. Development of one module of the proposed framework is also described at length. This module is capable to assess manufacturability of bending sheet metal parts. An illustrative example is also included to demonstrate the usefulness of this module. The proposed system framework is flexible enough to accommodate new acquired knowledge. As the proposed system is implementable on a PC having AutoCAD software, therefore its low cost of implementation makes it affordable even by small scale sheet metal industries.

Deformable Sheet Metal Fixturing: Principles, Algorithms, and Simulations

1996 ◽  
Vol 118 (3) ◽  
pp. 318-324 ◽  
Author(s):  
W. Cai ◽  
S. J. Hu ◽  
J. X. Yuan
Keyword(s):  
Sheet Metal ◽  
Rigid Bodies ◽  
Fixture Design ◽  
Total Deformation ◽  
Element Analysis ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Manufacturing Operations ◽  
Nonlinear Programming Methods ◽  
Simulation Package

Fixture design is an important consideration in all manufacturing operations. Central to this design is selecting and positioning the locating points. While substantial literature exists in this area, most of it is for prismatic or solid workpieces. This paper deals with sheet metal fixture design. An “N-2-1” locating principle has been proposed and verified to be valid for deformable sheet metal parts as compared to the widely accepted “3-2-1” principle for rigid bodies. Based on the “N-2-1” principle algorithms for optimal fixture design are presented using finite element analysis and nonlinear programming methods to find the best “N” locating points such that total deformation of the deformable sheet metal is minimized. A simulation package called OFixDesign is introduced and numerical examples are presented to validate the “N-2-1” principle and optimal sheet metal fixture design approach.

A knowledge-based manufacturing advisor for pressworked sheet metal parts

2012 ◽  
Vol 24 (6) ◽  
pp. 1253-1266 ◽  
Author(s):  
George-Christopher Vosniakos ◽  
Titos Giannakakis
Keyword(s):  
Sheet Metal ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Knowledge Based

An Approach to Automate Concept Generation of Sheet Metal Parts Based on Manufacturing Operations

2008 ◽  
Author(s):  
Jay Patel ◽  
Matthew I. Campbell
Keyword(s):  
Sheet Metal ◽  
Early Stage ◽  
Concept Generation ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Manufacturing Operations ◽  
Rectangular Patch ◽  
Modeling Software ◽  
Metal Design ◽  
New Perspective

This paper describes an approach to automate the design for sheet metal parts that are not only novel and manufacturable but also satisfies multiple objective functions such as material cost and manufacturability. Unlike commercial software tools such as Pro/SHEETMETAL which aids the user in finalizing and determining the sequence of manufacturing operations for a specified component, our approach starts with spatial constraints in order to create the component geometries and helps the designer design. While there is an enormous set of parts that can feasibly be generated with sheet metal, it is difficult to define this space systematically. To solve this problem, we currently have 88 design rules that have been developed for four basic sheet metal operations: slitting, notching, shearing, and bending. A recipe of the operations for a final optimal design is then presented to the manufacturing engineers thus saving them time and cost. The technique revealed in this paper represents candidate solutions as a graph of nodes and arcs where each node is a rectangular patch of sheet metal, and modifications are progressively made to the sheet to maintain the parts manufacturability. They are presented in the form of Standard Tessellation Language files (.stl) that can be transferred into available modeling software for further analysis. The overall purpose of this research is to provide creative designs to the designer granting him/her a new perspective and to check all the solutions for manufacturability in the early stage of design process. An example sheet metal design problem is shown in this paper with some of the preliminary designs that our approach created.

Experimental and Numerical Analysis of Blanking for Thin Sheet Metal Parts

2001 ◽  
Vol 4 (3-4) ◽  
pp. 319-333
Author(s):  
Vincent Lemiale ◽  
Philippe Picart ◽  
Sébastien Meunier
Keyword(s):  
Numerical Analysis ◽  
Sheet Metal ◽  
Thin Sheet ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Thin Sheet Metal

scholarly journals Analysis of Proximity Consequences of Coil Windings in Electromagnetic Forming

2021 ◽  
Vol 5 (2) ◽  
pp. 45
Author(s):  
Siddhant Prakash Goyal ◽  
Mohammadjavad Lashkari ◽  
Awab Elsayed ◽  
Marlon Hahn ◽  
A. Erman Tekkaya
Keyword(s):  
Proximity Effect ◽  
Experimental Methods ◽  
Electromagnetic Forming ◽  
Velocity Measurements ◽  
Local Curvature ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Geometrical Features ◽  
Physical Phenomena ◽  
Inverse Distance

Multiturn coils are required for manufacturing sheet metal parts with varying depths and special geometrical features using electromagnetic forming (EMF). Due to close coil turns, the physical phenomena of the proximity effect and Lorentz forces between the parallel coil windings are observed. This work attempts to investigate the mechanical consequences of these phenomena using numerical and experimental methods. A numerical model was developed in LS-DYNA. It was validated using experimental post-mortem strain and laser-based velocity measurements after and during the experiments, respectively. It was observed that the proximity effect in the parallel conductors led to current density localization at the closest or furthest ends of the conductor cross-section and high local curvature of the formed sheet. Further analysis of the forces between two coil windings explained the departure from the “inverse-distance” rule observed in the literature. Finally, some measures to prevent or reduce undesired coil deformation are provided.

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