Application of sequential diagrams in manufacturing assembly cell.

Danisova, Nina ; Hruskova, Erika ; Velisek, Karol 等

1. INTRODUCTION

The industrial manufacture is still forwarding. Today we are not talking only about using of IT, classical automated instruments. But when we are talking about flexible manufacturing systems it is effective to talk also about possible using of new generation manufacturing systems. These new generation manufacturing systems are also called intelligent manufacturing systems. All IMS subsystems are including parts of so called machine intelligence (sensor equipment). Using of given systems with combination of machine intelligence will lead to the complete labor remove from the manufacturing system. Basics which are needed for realization of machine intelligence in manufacturing systems is so called monitoring, which is able to monitor internal stay of the system and also changing conditions coming from environment. Monitoring systems are using sensors which are located at some proper place of the system, usually such place is tool, machine or some manipulating device. Sensors are identifying parameters, which are then used as input data of control system. Following to this data is realized some, technological, manipulating or other helping process.

2. ANALYSIS OF FLEXIBLE MANUFACTURING CELL

The flexible manufacturing cell can be found at the department of technological devices and systems (Fig.1.). This flexible manufacturing cell is created of some bearing subsystems such as:

* Industrial robot with Cartesian kinematics

* Shelf storage system (Kostal & Velisek, 2004).

There are five manufacturing phases integrated in the flexible manufacturing cell. Following to the conclusions and knowledge, were in the flexible manufacturing cell designed special added sensor units for each device. That means that every device will have its own sensor units, which will be used for processing of primal information. Such information ensures communication between single devices and control system. Before single sensor units specification, there was needed to specify requirements, which will be given to the designed intelligent manufacturing and assembly cell. (Danisova et al., 2008)

[FIGURE 1 OMITTED]

Main requirements used for intelligent manufacturing and assembly cell design were following.

Designed intelligent cell have to be able to react on various situations which are coming during the manufacturing process.

During the design of intelligent manufacturing cell, there was very important to conserve two basic subsystems, such as was during flexible manufacturing cell design. Designed intelligent manufacturing cell also save five manufacturing phase.

3. METHODOLOGY OF COMMUNICATION WAYS BETWEEN SINGLE DEVICES OF IMC

Before design of sensor equipment of single system subsystems, there was also important to solve writing kind of single stays and movements connected with parts. These stays of parts have to be created during running production process in the intelligent manufacturing cell. Proper writing methodology was created, which would be able to define the communication ways between single devices during running production process. Sensor equipment can be designed following to the writing of communication ways between single devices. At the beginning there were two kinds of methodology:

* Methodology which is using evolution diagrams and algorithms.

* Methodology of writing which is using rules of sequential diagrams (Majerik & Bajcik, 2008).

Sequential diagram, it is a new writing form, which is usually used are writing form for programming in the language UML. These diagrams are used for description of objects stays. Sequential diagrams are used for showing, how are single objects communicating to each other in the time (Fig.2.).Methodology of sequential diagrams was chosen as a proper methodology for communication writing between single devices operated in the intelligent manufacturing cell. Only synchronous messages can be found in the designed intelligent manufacturing cell. That means, there will not be any other operation created without backward signal in the control unit.

[FIGURE 2 OMITTED]

Before design process of single sensor equpement, there was important to realize communication analysis of devices communication ways in the time. The sequential diagram methodology was used. Writing methodology using sequential diagram, is a good way how to analyze communication between single devices, which are placed in the working space of the cell. On the (Fig.4.) is all intelligent manufacturing-assembly cell.

[FIGURE 3 OMITTED]

[FIGURE 4 OMITTED]

4. CONCLUSION

Sequential diagram methodology was used during the process design of intelligent manufacturing cell and during the process design of automated tool changing system. This methodology was chosen to describe communication of all devices during the manufacturing and also assembly process. Sensor equipment was selected following information, about the communication and signal transmission. The aim of sequential diagram methodology usage was to upgrade flexible manufacturing cell into the intelligent, with help of sensor equipment. This cell will be used for laboratory purpose.

Following upgrades and development of flexible manufacturing--assembly system are integrated to the manufacturing process as well as intelligent manufacturing systems too.

5. ACKNOWLEDGEMENTS

This article was realized with help of grand tasks VEGA 1/0206/09 Intelligent assembly cell.

6. REFERENCES

Danisova, N.; Zvolensky, R. & Velisek, K. (2008). Design additional check station with intelligent camera system. Annals of DAAAM and Proceedings of DAAAM Symposium.--ISSN 1726-9679.--Vol. 19, No.1. Annals of DAAAM for 2008 & Proceedings of the 19th International DAAAM Symposium "Intelligent Manufacturing & Automation: Focus on Next Generation of Intelligent Systems and Solutions", p. 0353-0354, ISBN 978-3-901509-68-1, Trnava, October 2008, DAAAM International Vienna

Kostal, P. & Velisek, K. (2004). Flexible assembly systems, Proceedings of Comatech 2004, pp. 201- 206, ISBN 83-920972-4-6, Protection of Mechanical Systems in the Mining Industry Against the impact of high Energy conference location, October 2004, ZINT, Ustron

Velisek, K.; Javorova, A.; Zvolensky, R.; Danisova, N. & Kostal, P. (2007). Multifunctional manufacturing and assembly system, In: Development of Mechanical Engineering as a Tool for Enterprise Logistics Progress: Science Report Project CII-PL-0033-01-0506, University of technologi, p. 135-158, ISBN 83-89873-28-1, Poznan

Kostal, P. & Mudrikova, A. (2008). Material flow in flexible manufacturing and assembly. Academic Journal of Manufacturing Engineering, Supplement, Issue 1, September 2008, p. 185-191, ISSN 1583-7904

Majerik, J. & Bajcik, S. (2008). CAD/CAM systems aid by computer. Strojarstvo, Vol. 12, No. 11, 2008, p. 108-109, ISSN 1335-2938