Indian Journal of Engineering & Materials Sciences

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Design, Fabrication and Performance Tests of a Double-Sided Sheet Hydroforming Test System


Affiliations
1 Endustriyel Elektrik Inc, Konya 42100, Turkey
2 Department of Mechanical Engineering, Tarsus University, Mersin 33400, Turkey
3 Department of Mechanical Engineering, Necmettin Erbakan University, Konya 42140, Turkey
4 Department of Mechanical Engineering, Konya Technical University, Konya 42250, Turkey
 

In this study, a double-sided sheet hydroforming (DSH) test system, which contains dies, sealing, pressure intensifiers, and a control unit, has been designed, built, and tested. The hydraulic numerical control system, which is currently used, has been modified as a four-axis where parameters are forming pressure, back pressure, punch position, and blank holder force. A hydromechanical deep drawing press has been modified in terms of die and sealing. New sealing components have been used to prevent leakage during the forming process because one side of the sheet is exposed to the forming pressure, and the other side is exposed to both the back pressure and the moving punch. Performance tests have been carried out to determine the limitations and capacity of the system. After the performance tests, it has been concluded that; the higher forming rates all along the process curve, the higher the pressure and force differences. However, the resultant error of the corresponding points has been only higher at the beginning of the process curve. In addition, the higher slopes in process curves have increased the pressure and force differences. A conical industrial part has been deformed by using hydromechanical deep drawing and DSH processes to test the performance of the DSH press. The wrinkling defect that occurred in previous hydroformed parts has been reduced remarkably by using back pressure in the DSH process. As a result, a double-sided sheet hydroforming test press has been successfully designed and manufactured. Finally, this study provides technical knowledge and can be used as a guideline for the design and performance evaluation of similar manufacturing systems.

Keywords

Double-Sided Hydroforming Process, Design, Performance Test, Sheet Hydroforming.
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Abstract Views: 151

PDF Views: 76




  • Design, Fabrication and Performance Tests of a Double-Sided Sheet Hydroforming Test System

Abstract Views: 151  |  PDF Views: 76

Authors

Mustafa Kemal URMAMEN
Endustriyel Elektrik Inc, Konya 42100, Turkey
Gürkan ATAŞ
Department of Mechanical Engineering, Tarsus University, Mersin 33400, Turkey
Murat DİLMEÇ
Department of Mechanical Engineering, Necmettin Erbakan University, Konya 42140, Turkey
Mevlüt TÜRKÖZ
Department of Mechanical Engineering, Konya Technical University, Konya 42250, Turkey
Osman ÖZTÜRK
Department of Mechanical Engineering, Konya Technical University, Konya 42250, Turkey
Hüseyin Selçuk HALKACI
Department of Mechanical Engineering, Konya Technical University, Konya 42250, Turkey

Abstract


In this study, a double-sided sheet hydroforming (DSH) test system, which contains dies, sealing, pressure intensifiers, and a control unit, has been designed, built, and tested. The hydraulic numerical control system, which is currently used, has been modified as a four-axis where parameters are forming pressure, back pressure, punch position, and blank holder force. A hydromechanical deep drawing press has been modified in terms of die and sealing. New sealing components have been used to prevent leakage during the forming process because one side of the sheet is exposed to the forming pressure, and the other side is exposed to both the back pressure and the moving punch. Performance tests have been carried out to determine the limitations and capacity of the system. After the performance tests, it has been concluded that; the higher forming rates all along the process curve, the higher the pressure and force differences. However, the resultant error of the corresponding points has been only higher at the beginning of the process curve. In addition, the higher slopes in process curves have increased the pressure and force differences. A conical industrial part has been deformed by using hydromechanical deep drawing and DSH processes to test the performance of the DSH press. The wrinkling defect that occurred in previous hydroformed parts has been reduced remarkably by using back pressure in the DSH process. As a result, a double-sided sheet hydroforming test press has been successfully designed and manufactured. Finally, this study provides technical knowledge and can be used as a guideline for the design and performance evaluation of similar manufacturing systems.

Keywords


Double-Sided Hydroforming Process, Design, Performance Test, Sheet Hydroforming.

References