scholarly journals Optimization of strip-layout using graph-theoretic methodology for stamping operations on progressive die: a case study

2021 ◽  
Vol 12 ◽  
pp. 5
Author(s):  
Shady Aly ◽  
Hend Abdelaaty ◽  
Osama Muneer Dawood ◽  
Hussein M. A. Hussein
Keyword(s):  
Layout Design ◽  
Sorting Algorithm ◽  
Process Technology ◽  
Progressive Die ◽  
Partially Ordered ◽  
Graph Theoretic ◽  
Strip Layout ◽  
Increase Productivity ◽  
Theoretic Technique

The design of the progressive die stamping process is optimized through minimizing the number of die stamping stations in the strip layout to reduce the die cost. In order to accomplish such end, in this study, a graph-theoretic based method is implemented to model and optimize the strip layout design. This method starts with mapping stamping features into stamping operations. This step is followed by constructing two graphs to model the precedence and adjacency constraints among stamping operations based on a set of manufacturing rules. These two graphs are called: operation precedence graph and operation adjacency graph. In the next step, a topological sorting algorithm clusters the operations into partially ordered sets. Then, a graph coloring algorithm clusters the partially ordered operations sets into final sequence of operations. The graph-theoretic technique has been implemented on a part currently manufactured by laser cutting process technology in some Egyptian factory in Cairo. This study indicated that the graph-theoretic technique offers several advantages including the ease of programming and transparency in understanding the obtained strip layout design. This is besides being a systematic and logically approach to obtain an optimized strip layout design. In general, the progressive die manufacturing can increase productivity of sheet metal works in Egypt, only in situations of mass production. The limitation is that it requires considerable skill level and training for labor to conduct die strip layout design.

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.

Automatic Definition of the Sequence of Operations in Progressive Dies

2006 ◽  
Author(s):  
Fernando Fado´n Salazar ◽  
Jose´ Enrique Cero´n Hoyos
Keyword(s):  
Optimal Design ◽  
Layout Design ◽  
Die Design ◽  
Progressive Die ◽  
Strip Layout ◽  
Progressive Dies ◽  
First Approximation ◽  
Two Phases ◽  
Definition Of ◽  
The Relationship

We are working in the design process of progressive dies to make that process more structured and, by this way, to be able to automate the different design phases. The basic phases that it’s necessary to follow in the design of a progressive die could be divided into two groups: 1. The strip layout design. This phase involves several steps such as to obtain blank development, to find the best layout, to define the sequence of operations, to calculate the forces... 2. The die design according to the strip layout previously designed. The characteristics’ die depends on the tools are necessary to use (standard or specific for each die), maintenance... These two phases are not independent between them, and the final and optimal design is achieved improving iteratively these phases. In the first phase, the strip layout design, one of the more important steps is to define all the operations that it’s necessary to carry out and the sequence that these operations have to follow to get the part with the wanted characteristics. In the present paper it’s presented a methodology and the software with its application. This methodology consists of extracting all data are going to be use to manufacture the part from its solid modeling or 3D representation. These data are used to create a relational diagram (or relational tree) that shows the relationship among the different features that form the part. Once this tree is represented, it’s used to define the operations that are going to be made and to obtain a first approximation to the sequence of operations that the designers could change according their experience.

Application of KOH Electrochemical Etch and Passive Voltage Contrast Techniques for Deep Sub-Micron CMOS Leaky Gate Detection

2000 ◽  
Author(s):  
Fred Y. Chang ◽  
Victer Chan
Keyword(s):  
Case Studies ◽  
Detection Technique ◽  
Cobalt Silicide ◽  
Process Technology ◽  
Process Flow ◽  
Voltage Contrast ◽  
Emission Detection ◽  
Wet Etch ◽  
Direct Confirmation

Abstract This paper describes a novel de-process flow by combining cobalt silicide / nitride wet etch with KOH electrochemical wet etch (ECW) to identify leaky gate in silicided deep sub-micron process technology. Traditionally, leaky gate identification requires direct confirmation by gate level electrical or emission detection technique. Ohtani [1] used KOH electrochemical etch application to identify nonsilicided leaky gate capacitor in DRAM without using the above confirmation. The result of the case study demonstrates the expanded application of ECW etch to both silicided 0.18um logic and SRAM devices. Voltage contrast at metal 1 to assist leaky gate localization is also proposed. By combining both techniques, the possibility for isolating gate related defects are greatly enhanced. Case studies also show the advantages of the proposed technique over conventional poly level voltage contrast in leaky gate identification especially with devices that use local interconnect and nitride liner process.

scholarly journals Risk analysis of production process for food SMEs using FMEA method: a case study

2021 ◽  
Vol 331 ◽  
pp. 02010
Author(s):  
Prima Fithri ◽  
Muhammad Rafi ◽  
Pawenary ◽  
A. S. Prabuwono
Keyword(s):  
Human Resources ◽  
Production Process ◽  
Critical Value ◽  
Risk Priority Number ◽  
Effect Analysis ◽  
Increase Productivity ◽  
Fmea Method ◽  
Bread Production ◽  
A Company

The increasing development of the industry makes every industry have to compete with other competitors to gain an edge. The advantages of competition are influenced by several factors, one of which is good human resource management. Where if a company has good human resources, it will increase profits indirectly and can increase productivity. This research discusses case studies about the potential dangers of IKM Heppy Bakery’s potential dangers that can harm workers in bread production. The method used is Failure Mode And Effect Analysis (FMEA). Later, the data will be filled and given a rating distinguished into three parts: severity, occurrence, and detection. The data were obtained through questionnaires given to 3 workers at IKM Heppy Bakery and filled in rating values based on the provisions that have been given to the questionnaire. This Value helps determine the Risk Priority Number (RPN) obtained from multiplication between severity, occurrence, and detection. After processing the RPN multiplication data, the highest RPN value was obtained by 193 with the danger factor of the operator overheating and dehydrating due to high temperatures. Furthermore, the calculation of critical Value was obtained by 109. Based on the critical Value obtained seven hazard factors above the critical value, these seven hazard factors need to be improved so that workers do not avoid accidents when conducting the production process.

scholarly journals Manufatura enxuta em um fabricante de produtos hospitalares: implantação e avaliação na percepção dos gestores

2019 ◽  
Vol 12 (1) ◽  
pp. 88
Author(s):  
Rogério Da Silva Nunes ◽  
Alessandra De Linhares Jacobsen ◽  
Rodrigo Dos Santos Cardoso
Keyword(s):  
Change Management ◽  
Behavioral Change ◽  
Lean Manufacturing ◽  
Implementation Process ◽  
Readiness For Change ◽  
Current Case ◽  
Medical Products ◽  
Increase Productivity ◽  
A Company

The use of lean production in organizations, which aims to broaden your results using fewer resources, that is, to increase productivity producing essentially necessary and eliminating what does not add value to clients, requires actions that include mapping of success environments and organization's readiness for change management. Hence we have the current case study, descriptive, which presents the implementation of lean manufacturing in the textile plant in Blumenau (Santa Catarina) that manufactures medical products from a company with three manufacturing units. Next, there were interviews with thirteen managers and staff who participated in the lean manufacturing implementation process in the unit in focus. As a result, we identified that the requirements and preparations for the deployment mentioned are directed to a behavioral change that includes preparation of leadership, aligned with the organization's strategy, which needs to be deployed to all areas. Also featured are the stages of implementation and attempts to institutionalize the environment provided by the principles of lean manufacturing. It concludes with the identification of categories of analysis for the changes arising from the aforementioned deployment.

scholarly journals Smed to increase productivity: A case study in an automobile industry

2020 ◽  
Vol 6 (6) ◽  
pp. 42088-42108
Author(s):  
Renan Fernandes da Cunha ◽  
Marcelle Mota Morais ◽  
Rafael Leite Nogueira ◽  
Hércules José Marzoque ◽  
Vinícius Expedito de Andrade Machado
Keyword(s):  
Automobile Industry ◽  
Increase Productivity
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