Integration CAD-CAE-CAM trough database for complex assemble.

Rahimic, Senad ; Visekruna, Vojo, Edin, Sunje

1. INTRODUCTION

The term CIM is a very broad term that is not easily defined and it is very difficult to fully implement in any production system. Therefore it is very difficult to analyze as a whole. This paper provides definitions its components CAE-CAD-CAM systems and shows their integration through a common database. Integration is shown in the practical example complex circuit. This integration significantly reduces the development time of new products or modifications of existing efficient alternatives. Product design is a critical activity of the production process because it is estimated that its share of 70% to 80% of the cost of development and production. In Figure 1st is shown Integration CAD-CAE-CAM system. Integration of these systems is very important because just as integrated show all his power and legitimacy of the use of.

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2. CAD SYSTEMS

CAD (Computer Aided Design) is a technology that takes into account the computer systems that help in the creation, modification, analysis and optimization design. Any program that contains the graphics and IT application software applied to the Engineering functions in the process of design is classified as a CAD program. In other words, the CAD tools may vary from geometric tools to manipulate shapes, a typical tool currently available includes the analysis of tolerance, the characteristics of the mass budget, and the method of finite elements and visual these analyzed results. Mostly the basic role of CAD is to define the geometry, because the geometry design basis for all other activities in the circle of production. CAD systems provide high quality and accuracy of project.

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In Figure 2 shows the assembly SP 450, which was formed in CAD software in and verified its dimensionality with the prescribed tolerance.

3. CAE SYSTEMS

CAE (Computer Aided Engineering) is a technology that use of computer systems for CAD geometry analysis, allows the model to simulate and eve as the product of conduct, so that the model can be redefined and optimize. Simulating movement of individual circuits is certain collision during the movement of individual elements. For the analysis it is necessary to make certain restrictions of the problem and is used as input to describe the size of this problem by using object-oriented programming.

3.1 Object oriented programming simulation

To simulate the movement of the circuit elements used programming software Visual Basic. In Figure 3 shows the frame of the simulation system of the analyzed elements SP 450.

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3.2 Analysis stress and strain

This paper will show how the CAE system uses modern computer technology with the aim of the analysis geometry CAD design. On the basis of these analysis is possible to identify and simulate how some mechanical part behaves when analyzed in the system by bringing the appropriate load. The software used for this analysis is Solid Works, and to his module COSMOS Works Designer. This software, as well as the one used for the analysis of movement, requires a certain input. This information must be.

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After entering the input information, software, form the final elements, analyzes them and gives quality results and stresses and strain. In Figure 4 shows the distribution of stress, while in Figure 5 showed of distribution shift

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4. CAM SYSTEM

CAM software generated code for the CNC machine processing of forms designed in CAD systems and additional information entered manually by the operator (programmer). Exit CAM module is usually a simple, G-code, which receives processing data is converted to a program in the form, G-code; It represents the written form, by which we will be working on NC and CNC machines parts defined in the CAD module and the information entered manually by the operator. This section is described one of the most modern CAM software that exists today in the world, which is certainly SOLIDCAM.

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In order to show the integration of CAM with CAD-CAE system simulated the processing of scratches special screw that is part of assembly SP 450 This is part of the appropriated from the common database CAE-CAD-CAM system is shown in Figure 5.

5. INTEGRATION OF CAD-CAE-CAM SYSTEMS

In this paper is shown an element of integrated database CAD-CAE-CAM system.

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In Figure 6 shows the integration of the database through an example of design, analysis and processing of special screws, which is part of a complex assembly.

6. CONCLUSION

In order to be concurrent on the World market, manufacturing systems are forced to develop a new sorts of products. Development of a new product is very expensive. If some mistakes happen in development phase those costs becomes enormously large. CIM systems show up all its advantages exactly in that field. These advantages reach its real value only if CIM components are integrated itself, as it's shown in this work.

CAD-CAE-CAM systems power is in fact the number of constructors, technologist and programmers is reduced as much as possible and process planning time is shorter. Whole work can be done very fast and efficient by less number of experts. Simulation of part behavior in real time is significant advantage of this software. Using this option, it's relatively easy to notice mistakes which are result of product development process. If mistakes are noticed and removed in reasonable time unplanned costs will be reduced to minimum. Software which can achieve strong integration of CAD-CAE-CAM is developing and it's real to expect them to become more powerful in the near future.

7. REFERENCES

Kunwoo Lee (1999). Principles of CAD/CAM/CAE Systems, Addison-Wesley, ISBN 0-201-38036-6, Seul National University

Hang-Wai, L. & Hon-Yuen, T. (2000). Object-oriented analysis and design of computer aided process planning system, Int. Journal CIM--vol 13

Kusiak, A. (2000). Decomposition in Data Minning: An Industrial Case Study, IEEE Transactions on electronics packagin manufacturing

Visekruna, V.; Petkovic, D.; & Rahimic, S. (2004). A contribution of the generative gt-system in the filed of forging industry, Proceedings of 4th International Symposium on Intelligent manufacturing systems--IMS Sakarya, Turkey