Development of an innovative hydraulic press for incremental forming: machine and process evaluation using a hybrid two-step process

Sevšek, Luka (avtor), Šimic, Marko (avtor), Herakovič, Niko (avtor), Pepelnjak, Tomaž (avtor)

Developing individual/personalised products requires flexible forming processes, which are limited by insufficient sheet thickness distribution and inadequate mechanical properties of the formed material. One group of forming processes with greater flexibility are incremental sheet metal forming (ISF) processes, the simplest representative of which is single-point incremental forming (SPIF). In order to improve the sheet thickness distribution, a pre-bulging process with subsequent SPIF is carried out in this study. Experimental results show that the integration of a pre-bulging step in a hybrid forming process leads to a more uniform final sheet thickness and reduces tip thinning compared to SPIF. This study focuses on the development of a hybrid machine based on a servo-hydraulic press to achieve sufficient forming accuracy with SPIF on difficult-to-form materials. SPIF is performed by increasing the flexibility of the hydraulic machine through the use of ball runner blocks mounted on the press bed, which allow movements in the horizontal plane. The developed hydraulic forming setup enables a significantly higher vertical force capacity, extending the application of SPIF to high-strength materials such as DP590 steel. This approach demonstrates a novel, scalable path for SPIF for industrially relevant materials and overcomes significant limitations of conventional CNC-based SPIF systems.

• Jezik: Angleški jezik
• Ključne besede: hybrid two-step forming, single-point incremental forming, sheet metal bulging, advanced hydraulic press concept, high energy incremental forming machine, dual-phase steel
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 18 str.
• Številčenje: Vol. 258, art. 114602
• PID: 20.500.12556/RUL-171230
• UDK: 621.226:621.98
• ISSN pri članku: 0264-1275
• DOI: 10.1016/j.matdes.2025.114602
• COBISS.SI-ID: 246058755
• Datum objave v RUL: 20.08.2025

Gradivo je del revije

• Naslov: Materials & design
• Skrajšan naslov: Mater. des.
• Založnik: Scientific and Technical Press
• ISSN: 0264-1275
• COBISS.SI-ID: 10626075

Licence

• Licenca: CC BY-NC 4.0, Creative Commons Priznanje avtorstva-Nekomercialno 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc/4.0/deed.sl
• Opis: Licenca Creative Commons, ki prepoveduje komercialno uporabo, vendar uporabniki ne rabijo upravljati materialnih avtorskih pravic na izpeljanih delih z enako licenco.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: hibridno dvo-stopenjsko preoblikovanje, enotočkovno inkrementalno preoblikovanje, izbočevanje pločevine, napredni koncept hidravlične stiskalnice, visokoenergijski stroj za inkrementalno preoblikovanje, dvofazno jeklo

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0248
• Naslov: Inovativni izdelovalni sistemi in procesi

• Financer: EC - European Commission
• Številka projekta: 101058693
• Naslov: Sustainable Transition to the Agile and Green Enterprise
• Akronim: STAGE