±â¼úÀÚ·á: Intelligent ½Ã½ºÅÛÀÇ ¼³°è ¹× °³¹ß(III)
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µî·Ï¹øÈ£: ¹®È­ ¶ó-08507 / ISSN 1599-4643(±¹Á¦Ç¥ÁØ¿¬¼Ó°£Ç๰¹øÈ£)
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Á¦ÈÞ.Á¦¾È.ÁúÀÇ & ±¤°í°ÔÀç.½ÅÁ¦Ç°¼Ò°³ ¹× ÀÚ·á¹®ÀÇ: ¿ù°£ ¸ÞÅ»³ÝÄÚ¸®¾Æ ÆíÁýºÎ
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Intelligent ½Ã½ºÅÛÀÇ ¼³°è ¹× °³¹ß (I)
-ÅëÇÕ ÀÚµ¿È­µÈ SSM ¼ºÇü ¿öÅ©¼¿ÀÇ °³¹ß-
(ÁÖ) Àμº±âÀü ºÎ¼³ ¿¬±¸¼Ò ¼ö¼® ¿¬±¸¿ø Á¤ È« ±Ô
Design and Development of an Intelligent System (III) : Development of an Integrated and Automated SSM Forming Workcell

Abstract

Based on a correlation between the insulated closed coil heating system modeling and insulated gripper modeling developed in Part I and II, an integrated and automated SSM forming workcell for the production of SSM components is introduced. For quality assessment, a full range of optical and electron macroscopy and a wide range of room and high temperature mechanical testing capabilities are used to characterize SSM feed stock and parts.

Key words:
Intelligent system (Intelligent ½Ã½ºÅÛ), Insulated closed coil heating system modeling (Àý¿¬ closed ÄÚÀÏ °¡¿­ ½Ã½ºÅÛ ¸ðµ¨¸µ), Insulated gripper modeling (Àý¿¬ ±×¸®ÆÛ ¸ðµ¨¸µ), Integrated and automated SSM forming workcell (ÅëÇÕ ÀÚµ¿È­µÈ SSM ¼ºÇü ¿öÅ©¼¿)

1. ¼­ ·Ð

¹Ý¿ëÀ¶ ¼ºÇüÀº ¹Ì¼¼ °áÁ¤¸³À» °¡Áø ¿ø¼ÒÀç ºô·¿À» ¿øÇÏ´Â ¿Âµµ·Î À¯µµ°¡¿­ÇÏ¿© ±¸»óÈ­ Á¶Á÷À» ¾òÀº ÈÄ ±ÝÇü³»¿¡¼­ °¡¾Ð ¼ºÇüÇÏ´Â »õ·Î¿î Á¤Çü°¡°ø (Net-shape manufacturing process)°øÁ¤ÁßÀÇ ÇϳªÀÌ´Ù.
¹Ý¿ëÀ¶ Àç·áÀÇ ¼ºÇü°øÁ¤Áß °í»ó°ú ¾×»óÀÇ ºÐ¸®Çö»ó¿¡ ±âÀÎÇÑ Æí¼® (Segregation)°ú °í»óÀ²À» Á¦¾îÇϱâ À§Çؼ­´Â ±ÝÇü ¼³°è µî¿¡ ÇÊ¿äÇÑ ¼öÄ¡ÇØ¼® ¹æ¹ýÀÇ Á¦¾È ¹× ÅëÇÕ ÀÚµ¿È­µÈ ¼ºÇü ¿öÅ©¼¿ÀÇ °³¹ßÀÌ Áß¿ä ÇÏ´Ù.
Áö±Ý±îÁö ¹ßÇ¥µÇ¾îÁø ½ÇÇè ¹× ¼öÄ¡ ÇØ¼®¿¡ °üÇÑ ¿¬±¸µéÀº ¹Ý¿ëÀ¶ Àç·áÀÇ ´Ü¼ø ¾ÐÃàÇØ¼® ¹× ¹°¼º Á¶»ç¿¡ °üÇÑ ¿¬±¸°¡ ´ëºÎºÐÀ̰í, À¯µµ°¡¿­ ½Ã½ºÅÛ ¹× ºô·¿ ÀÌ¼Û ·Îº¿ µîÀÇ °³¹ßÀ» ÅëÇÏ¿© ÅëÇÕ ÀÚµ¿È­µÈ ¼ºÇü ¿öÅ©¼¿ÀÇ °³¹ß¿¡ °üÇÑ Á¾ÇÕÀûÀÎ ¿¬±¸°á°ú´Â °ÅÀÇ º¸°íµÇÁö ¾Ê°í ÀÖ´Ù.
½ÇÁ¦ ÀÚµ¿Â÷ ºÎǰÀ¸·Î ÀÌ¿ëÇÒ ¼ö ÀÖ´Â Á¦Ç°Àº º¹ÀâÇÑ 3Â÷¿ø Çü»óÀ¸·Î µÇ¾î Àֱ⠶§¹®¿¡ ½ÇÇèÀ» ÅëÇÑ ½ÃÇà Âø¿À¹ý ¹× °æÇèÀûÀÎ µ¥ÀÌÅÍ¿¡ ÀÇÇØ °øÁ¤À» ÃÖÀûÈ­Çϱâ´Â ¾î·Æ´Ù.
µû¶ó¼­ º» ¿¬±¸¿¡¼­´Â Part (I) ¹× Part (II)¿¡¼­ Á¤È«±Ô°¡ Á¦¾ÈÇÑ Àý¿¬ Closed ÄÚÀÏ ½Ã½ºÅÛÀ» ÀÌ¿ëÇÑ À¯µµ°¡¿­ ½Ã½ºÅÛ ¹× Àý¿¬ ±×¸®ÆÛ ¸ðµ¨À» ÀÌ¿ëÇÑ ºô·¿ ÀÌ¼Û ·Îº¿ÀÇ °³¹ß µîÀ» Åä´ë·Î ÇÏ¿© »õ·Ó°Ô ÅëÇÕ ÀÚµ¿È­µÈ SSM ¼ºÇü ¿öÅ©¼¿ÀÇ °³¹ß¿¡ °üÇÏ¿© ¼Ò°³ÇϰíÀÚ ÇÑ´Ù.

2. °¡¿­µÈ ºô·¿ÀÇ °í»óÀ²À» ÃøÁ¤Çϱâ À§ÇÑ °í¿Â ·¹ÀÌÀú

ÃÊÀ½ÆÄ ½Ã½ºÅÛ
°í»óÀ² Á¦¾î°¡ ¹Ý¿ëÀ¶ ¼ºÇüÀÇ ¼ºÆÐ¸¦ Á¿ìÇÏ´Â ¸¸Å­ Á¤È®ÇÑ °í»óÀ² ºÐ¼®À» ¼öÇàÇϱâ À§Çؼ­ °í¿Â ·¹ÀÌÀú ÃÊÀ½ÆÄ ½Ã½ºÅÛÀ» Á¦À۵Ǿú´Ù.
Fig. 1Àº °¡¿­µÈ ºô·¿ÀÇ °í»óÀ²À» ÃøÁ¤ÇÏ°í »ê¾÷ü¿¡ ºñ¿ë ¹× ǰÁú¿¡ ´ëÇÑ Á¤È®ÇÑ Á¤º¸¸¦ Á¦°øÇϱâ À§ÇÏ¿© Á¦ÀÛµÈ °í¿Â ·¹ÀÌÀú ÃÊÀ½ÆÄ ½Ã½ºÅÛÀ» ³ªÅ¸³½ °ÍÀÌ´Ù.



Fig. 1. A high temperature laser ultrasonic system to measure the solid fractionof the heated billet.

3. ÅëÇÕ ÀÚµ¿È­µÈ ¹Ý¿ëÀ¶ ¼ºÇü ¿öÅ©¼¿ (Workcell)

¹Ý¿ëÀ¶ ¼ºÇü ¿öÅ©¼¿Àº SSM ºÎǰÀ» »ý»êÇϱâ À§ÇÏ¿© ÅëÇÕ ¹× ÀÚµ¿È­µÇ¾î ÀÖ´Ù.
Àü ¹üÀ§ÀÇ ±¤ÇÐÀüÀÚ °Å½Ã °Ë»ç, »ó¿Â ¹× °í¿ÂÀÇ ³ÐÀº ¹üÀ§¿¡¼­ ±â°èÀû >Å×½ºÆ®°¡ SSM ¿ø¼ÒÀç ¹× SSM ºÎǰÀ» Ư¼ºÈ­ (ƯÈ÷, ǰÁú Æò°¡)Çϴµ¥ »ç¿ëµÈ´Ù.



>Fig. 2. An automated billet induction heating system.


Fig. 3. An integrated and automated SSM forming workcell for the production of SSM parts.

Fig. 2¿Í Fig. 3Àº ÀÚµ¿È­µÈ ºô·¿ À¯µµ°¡¿­ ½Ã½ºÅÛ ¹× ±â°èÀû ¼ºÁúÀÌ ¿ì¼öÇÑ SSM ºÎǰÀ» »ý»êÇϱâ À§ÇÏ¿© »õ·Ó°Ô ÅëÇÕ ÀÚµ¿È­µÈ SSM ¼ºÇü ¿öÅ©¼¿À» ³ªÅ¸³»°í ÀÖ´Ù.
¹Ý¿ëÀ¶ ¼ºÇü ¿öÅ©¼¿Àº °øÁ¤°³¹ß ¹× °øÁ¤ ÃÖÀûÈ­¸¦ À§ÇÑ µ¥ÀÌÅ͸¦ Á¦°øÇϸç ÃÖ´ë ½Ã°£´ç 240ÀÇ ¼Óµµ·Î ºÎǰÀ» ¼ºÇüÇÒ ¼ö ÀÖ´Ù.
Àý¿¬ Closed ÄÚÀÏ ½Ã½ºÅÛÀ» ÀÌ¿ëÇÑ À¯µµ°¡¿­ ½Ã½ºÅÛ ¹× Àý¿¬ ±×¸®ÆÛ ¸ðµ¨À» ÀÌ¿ëÇÑ ºô·¿ ÀÌ¼Û ·Îº¿ÀÇ °³¹ß µîÀ» Åä´ë·Î ÇÏ¿© »õ·Ó°Ô ÅëÇÕ ÀÚµ¿È­µÈ SSM ¼ºÇü¿öÅ©¼¿ ¼³ºñÀÇ ±¸¼ºÀº ´ÙÀ½°ú °°´Ù.
ºô·¿ À¯µµ°¡¿­ ½Ã½ºÅÛ
ÀÌ¼Û ·Îº¿
600 ton ´ÙÀÌij½ºÆÃ±â
ÃßÃ⠷κ¿
´ÙÀÌ Áø°ø ½Ã½ºÅÛ
´ÙÀÌ ½ºÇÁ·¹ÀÌ ½Ã½ºÅÛ
¼øÈ¯ÇÏ´Â °í¿Â ¿ÀÀÏ ¿Âµµ Á¦¾î ½Ã½ºÅÛ
¿öÅ©¼¿ Á¦¾î±â

4. °á ·Ð

Part (I) ¹× Part (II)¿¡¼­ Á¤È«±Ô°¡ Á¦¾ÈÇÑ Àý¿¬ Closed ÄÚÀÏ ½Ã½ºÅÛÀ» ÀÌ¿ëÇÑ À¯µµ°¡¿­ ½Ã½ºÅÛ ¹× Àý¿¬ ±×¸®ÆÛ ¸ðµ¨À» ÀÌ¿ëÇÑ ºô·¿ ÀÌ¼Û ·Îº¿ÀÇ °³¹ß µîÀ» Åä´ë·Î ÇÏ¿© »õ·Ó°Ô ÅëÇÕ ÀÚµ¿È­µÈ SSM ¼ºÇü ¿öÅ©¼¿ÀÌ °³¹ßµÇ¾ú´Ù.

Acknowledgements
º» ¿¬±¸¸¦ ¼öÇàÇÒ ¼ö ÀÖµµ·Ï Ç×»ó ¼¼½ÉÇÑ ¹è·Á¸¦ ¾Æ³¢Áö ¾ÊÀº (ÁÖ) Àμº±âÀü Á÷¿ø ¿©·¯ºÐµé²² °¨»çÀÇ ¸»À» ÀüÇÕ´Ï´Ù.

References
[1] D. B. Spencer, R. Mehrabian, M. C. Flemings, Rheological Behavior of Sn-15 pct Pb in the Crystallization Range, Metallurgical Transactions A, Vol. 3A, 1972, pp. 1925-1932.
[2] M. C. Flemings, SSM: Some Thoughts on Past Milestones and on the Path Ahead, Proceedings of the 6th Int. Conf. on Semi-Solid Processing of Alloys and Composites (SSM2000), Turin, September 2000, edited by M. Rosso and G. Chiarmetta, Unione Industriale di Torino, Turin, Italy, 2000, pp. 11-14.
[3] M. C. Flemings, Behavior of Metal Alloys in the Semi-Solid State, Metallurgical and Materials Transactions A, Vol. 22A, 1991, pp. 957-981.
[4] A. Zavaliangos, Modeling of the Mechanical Behavior of Semisolid Metallic Alloys at High Volume Fractions of Solid, International Journal of Mechanical Sciences, Vol. 40, No. 10, 1998, pp. 1029-1041.
[5] R. F. Decker, R. D. Carnahan, R. Vining, E. Eldener, Progress in Thixomolding, Proceedings of the 4th Int. Conf. on Semi-Solid Processing of Alloys and Composites, Sheffield, June 1996, edited by D. H. Kirkwood and P. Kapranos, The University of Sheffield, Sheffield, England, 1996, pp. 221-224.
[6] K. P. Young, Recent Advances in Semi-Solid Metal (SSM) Cast Aluminum and Magnesium Components, Proceedings of the 4th Int. Conf. on Semi-Solid Processing of Alloys and Composites, Sheffield, June 1996, edited by D. H. Kirkwood and P. Kapranos, The University of Sheffield, Sheffield, England, 1996, pp. 229-233.
[7] G. L. Chiarmetta, Why Thixo ?, Proceedings of the 6th Int. Conf. on Semi-Solid Processing of Alloys and Composites (SSM2000), Turin, September 2000, edited by M. Rosso and G. Chiarmetta, Unione Industriale di Torino, Turin, Italy, 2000, pp. 15-21.
[8] K. Hall, H. Kaufmann, A. Mundl, Detailed Processing and Cost Considerations for New-Rheocasting of Light Metal Alloys, Proceedings of the 6th Int. Conf. on Semi-Solid Processing of Alloys and Composites (SSM2000), Turin, September 2000, edited by M. Rosso and G. Chiarmetta, Unione Industriale di Torino, Turin, Italy, 2000, pp. 23-28.
[9] P. Giordano, F. Boero, G. Chiarmetta, Thixoformed Space-Frames for Series Vehicles: Study, Development and Applications, Proceedings of the 6th Int. Conf. on Semi-Solid Processing of Alloys and Composites (SSM2000), Turin, September 2000, edited by M. Rosso and G. Chiarmetta, Unione Industriale di Torino, Turin, Italy, 2000, pp. 29-34.
[10] C. G. Kang, H. K. Jung, A Study on Solutions for Avoiding Liquid Segregation Phenomena in Thixoforming Process: Part II. Net Shape Manufacturing of Automotive Scroll Component, Metallurgical and Materials Transactions B, Vol. 32B, No. 1, 2001, pp. 129-136.
[11] C. G. Kang, H. K. Jung, Semisolid Forming Process -Numerical Simulation and Experimental Study, Metallurgical and Materials Transactions B, Vol. 32B, No. 2, 2001, pp. 363-371.
[12] H. K. Jung, C. G. Kang, Finite Element Numerical Simulation Modeling for Reheating Process of Semi-Solid Forming, Key Engineering Materials, Vols. 177-180, 2000, pp. 571-576.
[13] H. K. Jung, C. G. Kang, Y. H. Moon, Induction Heating of Semi-Solid Billet and Control of Globular Microstructure to Prevent Coarsening Phenomena, Journal of Materials Engineering and Performance, Vol. 9, No. 1, 2000, pp. 12-23.
[14] H. K. Jung, C. G. Kang, Advanced Numerical Simulations of Semi-Solid Forming Process, Proceedings of the 8th Int. Symp. on Plasticity and Its Current Applications (PLASTICITY2000), Whistler Resort, July 2000, edited by A. S. Khan, Whistler Resort, Vancouver, Canada, 2000, pp. 237-239.
[15] H. K. Jung, C. G. Kang, Finite Element Thermal Analysis of Induction Heating Process in Hypoeutectic Al-Si Materials for Semi-Solid Forming, Proceedings of the 8th Int. Symp. on Plasticity and Its Current Applications (PLASTICITY2000), Whistler Resort, July 2000, edited by A. S. Khan, Whistler Resort, Vancouver, Canada, 2000, pp. 240-242.
[16] C. G. Kang, H. K. Jung, A Study on a Thixoforming Process Using the Thixotropic Behavior of an Aluminum Alloy with an Equiaxed Microstructure, Journal of Materials Engineering and Performance, Vol. 9, No. 5, 2000, pp. 530-535.
[17] H. K. Jung, C. G. Kang, Finite Element Numerical Simulation Modeling for Reheating Process of Semi-Solid Forming, Proceedings of the 5th Asia-Pacific Symp. on Advances in Engineering Plasticity and Its Applications (AEPA2000), Hong Kong, June 2000, edited by T. X. Yu, Hong Kong University of Science and Technology, Hong Kong, 2000, pp. 571-576.
[18] C. G. Kang, H. K. Jung, A Study on Solutions for Avoiding Liquid Segregation Phenomena in Thixoforming Process: Part I. Constitutive Modeling and Finite Element Method Simulations for Die Design, Metallurgical and Materials Transactions B, Vol. 32B, No. 1, 2001, pp. 119-127.
[19] H. K. Jung, C. G. Kang, Effect of Alloying Element on the Mechanical Behavior and Superficial Defects in Thixoforged Components of Al-Si Alloys, Proceedings of the 5th Asia-Pacific Symposium on Advances in Engineering Plasticity and Its Applications (AEPA2000), Hong Kong, June 2000, edited by T. X. Yu, Hong Kong University of Science and Technology, Hong Kong, 2000, pp. 565-570.
[20] H. K. Jung, C. G. Kang, Reheating of Semi-Solid Aluminum Alloys and Mechanical Properties of Thixoforged Product, Transactions of Materials Processing (KSTP), Vol. 8, No. 5, 1999, pp. 437-448.
[21] H. K. Jung, C. G. Kang, Filling Behavior and Mechanical Properties of Semi-Solid Aluminum Alloys in Thixoforging Process, Journal of the Korean Foundrymen's Society (KFS), Vol. 19, No. 4, 1999, pp. 330-340.
[22] H. K. Jung, C. G. Kang, Nonferrous Metals: Reheating of Semi-Solid Aluminum Alloys and Mechanical Properties of Thixoforged Product, Industry Journal News (MetalNet Korea), Vol. 1, No. 3, 2000, pp. 138-151.
[23] C. G. Kang, N. S. Kim, H. K. Jung, Automatic Mesh Generation and Remeshing for Finite Element Simulation of Semi-Solid Forming Process, Proceedings of the 6th Int. Conf. on Semi-Solid Processing of Alloys and Composites (SSM2000), Turin, September 2000, edited by M. Rosso and G. Chiarmetta, Unione Industriale di Torino, Turin, Italy, 2000, pp. 801-806.

H. K. Jung : Chief Researcher of Institute of Insung Electrical Machinery Industry Company
Tel: 055-323-5701~4, Fax: 055-323-5705
E-mail: hongkyuj@lycos.co.kr hongkyuj@hanmail.net

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