Development of Computer-Aided Process Planning System for Plate Bending by Line Heating (Report 1)—Relation Between Final Form of Plate and Inherent Strain

1994 ◽  
Vol 10 (01) ◽  
pp. 59-67 ◽  
Author(s):  
Yukio Ueda ◽  
Hidekazu Murakawa ◽  
Ahmed Mohamed Rashwan ◽  
Yasuhisa Okumoto ◽  
Ryoichi Kamichika
Keyword(s):  
Plastic Strain ◽  
Three Dimensional ◽  
Planning System ◽  
Plate Bending ◽  
Line Heating ◽  
Computer Aided Process Planning ◽  
Heating And Cooling ◽  
Process Planning System ◽  
Plan Making ◽  
Inherent Strain

Plate bending by line heating can be considered as a process in which plates are bent to three-dimensional form by the plastic strain caused during the gas heating and water cooling. Therefore, the plan making for this process can be separated into two parts. The first part is to decide what type and how much plastic strain should be applied on which location on the plate. The second part is to find what are the proper heating and cooling conditions to get the desired plastic strain. The authors investigated the relation between the final form of the plate and the plastic strain or the inherent strain to be applied for the plate bending. For this purpose, the finite-element method (FEM) is employed. Based on the knowledge obtained through the analysis, a method to determine the part of the plate to be heated and the magnitude of the required inherent strain is proposed.

Development of Computer-Aided Process Planning System for Plate Bending by Line Heating (Report 3)—Relation Between Heating Condition and Deformation

1994 ◽  
Vol 10 (04) ◽  
pp. 248-257 ◽  
Author(s):  
Yukio Ueda ◽  
Hidekazu Murakawa ◽  
Ahmed Mohamed Rashwan ◽  
Isao Neki ◽  
Ryoichi Kamichika ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Planning System ◽  
Heating Process ◽  
Plate Bending ◽  
Heating Condition ◽  
Line Heating ◽  
Computer Aided Process Planning ◽  
Dimensional Finite Element ◽  
General Relations ◽  
Three Dimensional Finite Element

An effective plate bending process by line heating can be achieved when the heating conditions are properly selected to produce desirable bending or inplane deformations. To make such decisions on he heating condition, the relation between heating conditions and deformations must be clarified. For his purpose, the authors studied the similarity rule which holds for the line heating process and derived wo parameters governing the deformations. Also, they developed new three-dimensional finite-element method codes as versatile tools to replace costly experiments. The validity of these codes is examined through comparison with an experiment, and they are applied to study the general relations between he parameters and the deformations of plates.

scholarly journals Development of Computer Aided Process Planning System for Plate Bending by Line-Heating

1993 ◽  
Vol 1993 (173) ◽  
pp. 409-419 ◽  
Author(s):  
Yukio Ueda ◽  
Hidekazu Murakawa ◽  
Rashwan Ahmed Mohamed ◽  
Isao Neki ◽  
Ryoichi Kamichika ◽  
...  
Keyword(s):  
Process Planning ◽  
Planning System ◽  
Plate Bending ◽  
Line Heating ◽  
Computer Aided Process Planning ◽  
Process Planning System ◽  
Computer Aided

Development of Computer-Aided Process Planning System for Plate Bending by Line Heating (Report 2)—Practice for Plate Bending in Shipyard Viewed from Aspect of Inherent Strain

1994 ◽  
Vol 10 (04) ◽  
pp. 239-247
Author(s):  
Yukio Ueda ◽  
Hidekazu Murakawa ◽  
Ahmed Mohamed Rashwan ◽  
Yasuhisa Okumoto ◽  
Ryoichi Kamichika
Keyword(s):  
Present Report ◽  
Planning System ◽  
Heating Process ◽  
Plate Bending ◽  
Skilled Workers ◽  
Line Heating ◽  
Computer Aided Process Planning ◽  
Bending Process ◽  
Theoretical Predictions ◽  
Inherent Strain

In the plate bending process by line heating, the decisions as to which part of the plate should be heated and in which direction are usually made by skillful workers. However, the number of skilled workers is declining rapidly and in recent years this has become a serious problem in shipyards. To solve the problem, the authors in an earlier report proposed a method to make the decisions based on theoretical analyses focused on inherent strain. The potential usefulness of the method was demonstrated through example problems dealing with mathematical ideal geometry. In the present report, a comparison is made between theoretical predictions and actual shipyard practice in forming curved members of a ship hull, and an attempt is made to visualize the knowledge of skilled workers, which heretofore was invisible, using computer graphic images showing inherent strain. Further, it is demonstrated that the same idea can be applied not only to make decisions on the line heating process but also to design the total plate bending process, including decisions on using the bending roller and the press machine.

STUDY AND APPLICATION OF OPEN DIE FORGING CAPP SYSTEM BASED ON PROCESS KNOWLEDGE

2011 ◽  
Vol 10 (01) ◽  
pp. 45-52 ◽  
Author(s):  
FANXIN KONG ◽  
JIANMIN ZUO ◽  
GUANGCHENG ZHA ◽  
JIAO ZHANG
Keyword(s):  
Planning System ◽  
Optimal Process ◽  
System Framework ◽  
Process Knowledge ◽  
Computer Aided Process Planning ◽  
Die Forging ◽  
Process Route ◽  
Process Planning System ◽  
Computer Aided ◽  
Open Die Forging

This paper discusses concepts and methods related to CAPP (Computer Aided Process Planning) system based on process knowledge. The CAPP system framework module of Open Die Forging facing industry is proposed. This module can realize the fusion of retrieval type, derived type, and creative type, etc. CAPP functions, reasons and makes decision based on knowledge and, develops the optimal process route, and process card. In this paper, the main functions of the system are introduced based on developments of open die forging CAPP system in recent years.

Study on Integration of Computer Aided Process Planning System and PDM System

2013 ◽  
Vol 416-417 ◽  
pp. 919-924
Author(s):  
Hong Xia Yang ◽  
Wei Dong Chen ◽  
Hua Sheng Feng
Keyword(s):  
Product Design ◽  
Process Planning ◽  
Rapid Development ◽  
Computer Integrated Manufacturing ◽  
Planning System ◽  
Strong Basis ◽  
Computer Technique ◽  
Computer Aided Process Planning ◽  
Process Planning System ◽  
Computer Aided

With the rapid development of modern science and technology and computer technique, modern enterprise faces new challenges for product design, production, management, market planning and sales. The products of enterprises develop towards diversification, serialization and individualization. Technological design is important in product manufacturing process and is a bond of product design and actual production. Therefore, modern enterprises need to develop computer aided process planning system to improve the quality and efficiency of process design of the enterprise. Starting from the requirements of enterprises on computer aided process planning systems and combining the existing Web technology, the paper proposes the study on integration of computer aided process planning system and PDM system. The development and application of the system not only provides strong support for enterprises realizing rapid design and manufacture and strong basis for enterprises realizing computer integrated manufacturing system, but also makes informationization degree, economic benefit and social benefit of enterprises improve greatly.

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