Izumov A.I., Terekhov D.Y, Talko A.A.

Don state technical university, Russian Federation

Mechatronic processing facility smart-passport as a control technology system of computer-integrated manufacturing.

Introduction. Multioperational machines are quite common representatives of the technological automated production facilities class. It is known that accuracy is the most important characteristic of any process equipment, in this case - CNC machine-tool. Increasing the accuracy of parts manufacture increases the machinery and equipment service life. In case of insufficient manufacturing precision machine parts constituting the quality of its operation will be low; also during the operation there may be considerable dynamic loads which result in accelerated equipment wear and failure [1].

Smart-passport is a multioperational machine intelligent electronic technical documentation, as well as any other mechatronic technology equipment. Smart-passport technology [2] is implemented as a standalone software module that is able to connect to the machine programmed numerical control. Therefore it is possible to make correction for the control program using intelligent smart passport support implemented by the presence of its own knowledge systems.

Knowledge system is the smart passport intelligent base support and it provides the solutions of technological object management. The solutions are generated by the system based on individual knowledge and current particular object characteristics on the knowledge system rules basis, which allows for a more adequate assessment of the making decisions situation. In [3] stated that for the most complete form of the machine knowledge system there must be established a database to both operational and heritage mechatronic processing facility parameters.

The knowledge system also composed of a number of knowledge sub-systems, including: processing, machine tool, the workpiece, as well as several decision rules sets in metal working operations (… length of drilling, boring …) , and the required accuracy parameters (… dimensional accuracy , roughness …). Situation assessment and decision making are performed by the multilevel intelligent control system [4]. The program of decision-making by the number of passes and parameters defined in terms of heritage and operational data. The functions of the control system consists of processing accuracy prediction, decision-making and action programs, also the prognosis comparison with the results of machining and knowledge.

The communication between the smart-passport and CNC machine include the possibility of using an intelligent control system accepted solutions to produce, or correction of the control program, as well as loading passport data and knowledge bases. The communication with the operators provides an access to smart passport through information network.

Let us consider some of the smart-passport principles for example «Tool» subsystem. This subsystem includes a set data on the state of the cutting tools installed in multioperational machine tool storage magazine. The subsystem is equipped with a module change observation tool status due to its wear on metal working stage. The observation module works in conjunction with the tool monitoring module, which is designed to assess the tool behavior, as well as prediction of its parameters and wear resistance.

Figure 1 – The tool wear diagrams generated by prediction module of smart-passport multi-operational machine "tool" subsystem; h_r - the radial wear, T - the tool life.

The figure 1 show the diagrams of the cutting tool radial wear depending on the processing time. Processed material - steel C45N, processed tools - «The Links», end mills, d = 10 mm with 4 router bit. The latching tool checkpoints marked on the diagrams. Removing data produced at regular intervals (excluding the process of running the tool). As can be seen from the figure, the module fixed observation period increased tool wear in 4 of 5 cases at around 40 min. from the beginning of machining process. After 55 min. all cutters underwent steadily increasing wear, which may result in damage to both the tool and equipment.

Conclusion. The machines passportization is an important step in improving the efficiency, accuracy and productivity of machining operations. Mechatronic processing facility smart-passport proposed for use as a modern technology of machine control system in automated production. In addition to direct increase accuracy and productivity through smart passport are provided the exchange of information, identification of residual life and reliability of the equipment, etc.

References

1. Tugengold A.K. The machine control system, providing high precision of machining process / Tugengol'd, A.K., Luk'yanov, E.A., Gerasimov V.A, Russian Engineering Research 8 (17) , pp. 82., 1999.

2. Smart-control system for machine tools / Tugengol'd, A.K., Luk'yanov, E.A., Remizov, E.A., Nosenkov, D.A., Russian Engineering Research 29 (3) , pp. 298, 2009.

3. Intelligent control of technological systems / Tugengol'd, A.K., Luk'yanov, E.A., Remizov, E.V., Korotkov, O.E., Russian Engineering Research 28 (5) , pp. 479, 2008.

4. The design of smart electronic documentation for machine tools / Samodurov, G.V., Tugengol'd, A.K., Yudenkov, N.P., Luk'yanov, E.A., Russian Engineering Research 33 (2) , pp. 102, 2013