Tooling CAD Models Preparation Process for Automated Technology Design System

Author(s):  
Maciej Kowalski ◽  
Przemysław Zawadzki
Author(s):  
Takashi Kiriyama ◽  
Tetsuo Tomiyama ◽  
Hiroyuki Yoshikawa

Abstract This paper discusses a theory and its implementation of integrated design object modeling for intelligent CAD. Models from different aspects must be correlated at the level of their background theories, so that the system can derive relationships among models from knowledge about the physical world. The metamodel concept proposed in this paper is a framework for integrating design object models in this manner. In order to implement the metamodel, we need representations of concepts about physical phenomena and a method for reasoning out the relationships among the concepts. Qualitative physics plays two roles for this purpose. The first role is to serve as a representation framework of concepts and their relationships. The second role is to serve as a reasoning method for generating aspect models and deriving qualitative behaviors from the aspect models. The idea of the metamodel is demonstrated by a design system, which provides the designer with physical features to build a primary model, helps to generate aspect models from the primary model, and maintains consistency among the aspect models.


Author(s):  
Xun Xu

Conventional CAD models only provide pure geometry and topology for mechanical designs such as vertices, edges, faces, simple primitives, and the relationship among them. Feature recognition is then required to interpret this low-level part information into high-level and domain-specific features such as machining features. Over the years, CAD has been undergoing fundamental changes toward the direction of feature-based design or design by features. Commercial implementations of FBD technique became available in the late 1980’s. One of the main benefits of adopting feature- based approach is the fact that features can convey and encapsulate designers’ intents in a natural way. In other words, the initial design can be synthesized quickly from the high-level entities and their relations, which a conventional CAD modeller is incapable of doing. However, such a feature-based design system, though capable of generating feature models as its end result, lacks the necessary link to a CAPP system, simply because the design features do not always carry the manufacturing information which is essential for process planning activities. This type of domain-dependent nature has been elaborated on in the previous chapter. In essence, feature recognition has become the first task of a CAPP system. It serves as an automatic and intelligent interpreter to link CAD with CAM, regardless of the CAD output being a pure geometric model or a feature model from a FBD system. To be specific, the goal of feature recognition systems is to bridge the gap between a CAD database and a CAPP system by automatically recognizing features of a part from the data stored in the CAD system, and based on the recognized features, to drive the CAPP system which produces process plans for manufacturing the part. Human interpretation of translating CAD data into technological information required by a CAPP system is thus minimized if not eliminated.


Author(s):  
Joel Johansson

Manufacturing companies are required to develop and produce products that meet increased requirements from customers and investors on shortened time spans. One key factor in meeting these requirements is the efficiency of the product development and the production preparation process. Design automation is a powerful tool to increase efficiency in these two processes. The benefits of automating the production preparation process are shortened lead-time, improved product performance, and ultimately decreased cost. Further, automation is beneficial as it increases the ability to adapt products to new product specifications with production preparations done in few or in a single step. During the automation process, knowledge about the production preparation process is collected and stored in the corporation systems, thus allowing full control over the design of production equipments. The contribution of this work is a method for connecting knowledge pieces implemented in auxiliary software applications using an inference engine. The knowledge pieces can control CAD-models and automatically generate, execute, and interpret finite element analyses. The presented method allows the automation of corporation know-how developed by skilled engineers over time. Further, it is possible for the resulting systems to meet criteria for good design automation systems such as low effort of developing, low level of investment, user readable and understandable knowledge, scalability, and flexibility. The method is exemplified by an implementation for analyzing manufacturability of the rotary draw bending of extruded sections of aluminum where the sections are complex. The output from the example system is based on established design practice and heuristic knowledge developed over many years of practical experience, rules analytically derived from fundamental physical laws, and finite element calculations. The system applies knowledge to a given specification that a skilled engineer otherwise would do manually. The method is described along with the example system in this paper.


Author(s):  
Chonghua Wang ◽  
Chengji Liang

Large structure such as container crane is small amount manufacturing and made for order. A lot of designers must work cooperatively to bring it to success as early as it is needed. Besides, collecting and identifying customers’ needs and understanding their idea are essential tasks in the development process. In this paper, a 3D parametric design system based on hybrid pattern of Client/Server and Browser/Server is introduced to achieve the coordination between the design team and close communication with the customers. In Client/Server architecture, a framework is presented to support integration of CAD/CAE. The effective management of mail and message can ensure swift, safe and effective communication between designers and avoid useless working and wrong result. Based on the top-down design method, skeleton model, technologies of parametric 3D modeling, finite element analysis, integrated CAD/CAE and engineering database, the CAD platform of 3D parametric model family for crane design is set up. That let the cooperation of the design team possible. In Browser/Server architecture, standard Internet Explores act as the browsers, which will exchange the desired information as well as dynamically display the CAD models in VRML format according to request.


Author(s):  
E.A. Fischione ◽  
P.E. Fischione ◽  
J.J. Haugh ◽  
M.G. Burke

A common requirement for both Atom Probe Field-Ion Microscopy (APFIM) and Scanning Tunnelling Microscopy (STM) is a sharp pointed tip for use as either the specimen (APFIM) or the probe (STM). Traditionally, tips have been prepared by either chemical or electropolishing techniques. Recently, ion-milling has been successfully employed in the production of APFIM tips [1]. Conventional electropolishing techniques are applicable to a wide variety of metals, but generally require careful manual adjustments during the polishing process and may also be time-consuming. In order to reduce the time and effort involved in the preparation process, a compact, self-contained polishing unit has been developed. This system is based upon the conventional two-stage electropolishing technique in which the specimen/tip blank is first locally thinned or “necked”, and subsequently electropolished until separation occurs.[2,3] The result of this process is the production of two APFIM or STM tips. A mechanized polishing unit that provides these functions while automatically maintaining alignment has been designed and developed.


1997 ◽  
Author(s):  
Walter G. Albert ◽  
Winston Bennett ◽  
Kenneth Pemberton ◽  
Charles Holt ◽  
Pat Waldroop

2020 ◽  
Vol 5 (1) ◽  
pp. 78
Author(s):  
Ade Sumaedi ◽  
Makhsun Makhsun ◽  
Achmad Hindasyah

PT. Duta Nichirindo Pratama is a company engaged in the field of Autoparts Manufacture. Barcode is the identity of an item / product on the package. Barcode technology has been used as the identity of goods in a production. Barcodes are used to facilitate the identification of goods produced. Paste the barcode on the packaging of packaging results at PT. Duta Nichirindo Pratama is done manually, but there are often errors attached to the barcode on a similar packaging. This research will design and create a system based on Visual Basic.Net and Arduino to select barcode attachment errors that have the potential to be sent to consumers. The system is designed using Unified Modeling Language (UML) diagrams, database design and interface menu design. The system created will then be tested to detect the black box test. With a computing-based design system that functions to detect barcodes on the packaging automatically, the problem of sticking barcodes on the packaging can be detected.


2018 ◽  
Vol 7 (2) ◽  
pp. 180
Author(s):  
Wiyanto Wiyanto ◽  
Fajar Butsianto ◽  
Karsito Karsito

Information technology is rapidly developed in this century that impact to various aspects of the organization really need information technology to support the performance and everyday business processes. In health services, information technology is required to process and storage the patient medical records, so that the patient's medical record is well preserved, and competitive advantage can be obtained between patient and polyclinic. The application of Customer Relationship Management (CRM) approach can be developed by implementing information system of medical record history to get new patient and retain existing patient, improving relationship with patient and maintaining patient loyalty as well as supporting the company/organization to provide excellent service to customers in real time through the advantage of information technology. The aims of this research are to understand patient medical record by CRM approach and Unified Modeling Language (UML) for system design, system validation using Forum Group Discussion (FGD), and using software testing Model ISO 9126. The result of this research are Medical Record History Information System and the result of system validation with FGD is 100% accepted, the result of system test using Model ISO 9126 is good with success rate 82,86%, so it can give contribution to polyclinic.


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