Computer-Aided Process Planning of Strip Layout in Progressive Dies

2011 ◽  
Vol 110-116 ◽  
pp. 5106-5110
Author(s):  
Alan C. Lin ◽  
Dean K. Sheu
Keyword(s):  
Sheet Metal ◽  
Layout Design ◽  
New Approach ◽  
Computer Aided Process Planning ◽  
Step Process ◽  
Strip Layout ◽  
Evaluation Functions ◽  
Progressive Dies ◽  
Computer Aided ◽  
Manufacturing Knowledge

This paper proposes a two-step process which uses the knowledge gathered in sheet-metal manufacturing practice as the basis to find proper layouts of strip in progressive dies. In the first step, manufacturing knowledge is used to formulate various rules to cluster the punches into five categories for reducing the searching space of feasible layouts. Evaluation functions are then applied to find the better ones from the feasible layouts. This two-step process provides a new approach to solving the problem of “explosive combinations” in strip layout design

Automatic strip layout design in progressive dies

2010 ◽  
Vol 23 (3) ◽  
pp. 661-677 ◽  
Author(s):  
Mehrdad Ghatrehnaby ◽  
Behrooz Arezoo
Keyword(s):  
Layout Design ◽  
Strip Layout ◽  
Progressive Dies

A CAPP/CAD for Sheet Metal Deep Drawing

2014 ◽  
Vol 619 ◽  
pp. 105-109
Author(s):  
R.K. Abdel-Magied ◽  
H.M.A. Hussein
Keyword(s):  
Sheet Metal ◽  
Deep Drawing ◽  
Computer Aided Design ◽  
Basic Program ◽  
Integrated System ◽  
Computer Aided Process Planning ◽  
Drawing Die ◽  
Computer Aided ◽  
Aided Design ◽  
Drawing Dies

The aim of this work is to develop an integrated system for facilitating the process of designing the drawing dies and their component. The developed system is based on the integration between Computer Aided Process Planning in Sheet Metal Drawn parts “CAPP”, and the Computer Aided Design in Deep Drawing Die components “CAD”. Both modules are coded using Visual Basic program and joined with AutoCAD. The CAPP module made to report the drawing load and to plot the shape of the drawn shell in each stage of the Axis-Symmetric Deep Drawing process. Based on the reported shell geometry, the dimensions of the die components are calculated and transferred to the CAD module. The CAD module, which is based on many data bases (standard parts, sheet metal data), plots the required deep drawing die components for each drawn stage on the AutoCAD monitor. A demonstrated example is presented to validate the developed system and to show that the system results are acceptable.

Computer Aided Process Planning for Freeform Surface Sheet Metal Features in Automotive Industry

2013 ◽  
Vol 392 ◽  
pp. 931-935
Author(s):  
M.A. Saleh ◽  
H.M.A. Hussein ◽  
H.M. Mousa
Keyword(s):  
Sheet Metal ◽  
Process Planning ◽  
Cost Estimation ◽  
Data Exchange ◽  
Feature Recognition ◽  
Freeform Surface ◽  
Free Form ◽  
Computer Aided Process Planning ◽  
Computer Aided ◽  
Surface Sheet

This paper describes computer aided process planning for a freeform surface; sheet metal features. Automotive body panels are always manufactured using thin forming sheets; the developed CAPP system consists of two modules which are feature recognition module based on STEP AP203 and a process plan module; two additional modules for automotive panel CAPP system and cost estimation module are also incorporated in the system of punch and bending operation. Stamped or punched features in generative shape design are used to design automotive panels; the generative CAPP system is written in visual basic 2008 language and implemented in several case studies demonstrated in the present work. Feature recognition of punched; stamped internal features in free form surface recognized in base of data exchange files using STEP AP203 ISO-10303-21.

Digital Strip Layout Design of Multi-Station Progressive Die

2014 ◽  
Vol 687-691 ◽  
pp. 3433-3436
Author(s):  
Xiao Da Li ◽  
Xiang Hui Zhan
Keyword(s):  
Sheet Metal ◽  
Traditional Method ◽  
Layout Design ◽  
Die Design ◽  
Suitable Method ◽  
Progressive Die ◽  
Strip Layout ◽  
Building Layout ◽  
Assembly Structure ◽  
Progressive Die Design

Strip Layout design plays a key role in multi-station progressive die design, and the traditional method of designing layout is complicated, timewasting. To design layout of progressive die with PDW is efficient, easy to be modified. In this paper, the process of building layout is discussed. First of all, sheet metal should be pretreated to build immediate stage, and the suitable method can be chosen to unfold sheet metal according the configuration feature of the product. Secondly, it needs to build the assembly structure of progressive die, called initialization. Thirdly, with tools including Blank Generator, Blank Layout, Scrap Design, and Strip Layout to finish layout design. In the end, the paper takes a sheet metal for instance to finish the layout. The method of designing layout with PDW improves the traditional method’s deficiencies, and improves the efficiency greatly.

scholarly journals A New Approach to the Topological Design of Hybrid Circuits

1980 ◽  
Vol 7 (1-3) ◽  
pp. 181-186
Author(s):  
Walter Ulbrich ◽  
Rudolf Van Der Leeden
Keyword(s):  
Design Process ◽  
Design Procedure ◽  
Layout Design ◽  
Machine Design ◽  
Real Problem ◽  
New Approach ◽  
Topological Design ◽  
Computer Aided ◽  
Technological Constraints ◽  
Circuit Graph

A computer-aided topological hybrid layout-design procedure is proposed, that yields the wanted principal routing in the form of a geometrical planarization graph. A so-called grid-embedding of a circuit graph into the Euklidean plane enables us to observe all except one of the various technological constraints. The real problem is reduced to finding a proper arrangement of “nets” and “flocks” in the plane in order to meet the omitted cross-capacity constraint. The solution is accomplished by a constructive and implicit enumeration procedure, which is used within an interactive man-machine design process.

scholarly journals Development of a STEP-compliant design and manufacturing framework for discrete sheet metal bend parts

2016 ◽  
Vol 232 (6) ◽  
pp. 1090-1104 ◽  
Author(s):  
Zahid Faraz ◽  
Syed Waheed ul Haq ◽  
Liaqat Ali ◽  
Khalid Mahmood ◽  
Wasim Akram Tarar ◽  
...  
Keyword(s):  
Sheet Metal ◽  
Computer Aided Design ◽  
Sheet Material ◽  
Three Dimensional ◽  
Feedback Mechanism ◽  
Numerical Control ◽  
Computer Aided Process Planning ◽  
Computer Aided ◽  
Design And Manufacturing ◽  
Aided Design

Metal sheets have the ability to be formed into nonstandard sizes and sections. Displacement-controlled computer numerical control press brakes are used for three-dimensional sheet metal forming. Although the subject of vendor neutral computer-aided technologies (computer-aided design, computer-aided process planning and computer-aided manufacturing) is widely researched for machined parts, research in the field of sheet metal parts is very sparse. Blank development from three-dimensional computer-aided design model depends on the bending tools geometry and metal sheet properties. Furthermore, generation and propagation of bending errors depend on individual bend sequences. Bend sequence planning is carried out to minimize bending errors, keeping in view the available tooling geometry and the sheet material properties’ variation. Research reported in this article attempts to develop a STEP-compliant, vendor neutral design and manufacturing framework for discrete sheet metal bend parts to provide a capability of bidirectional communication between design and manufacturing cycles. Proposed framework will facilitate the use of design information downstream at the manufacturing stage in the form of bending workplan, bending workingsteps and a feedback mechanism to the upstage product designer. In order to realize this vendor neutral framework, STEP (ISO 10303), AP203, AP207, and AP219 along with STEP-NC (ISO14649) have been used to provide a basis of vendor neutral data modeling.

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