Abstract
Abstract Hole making process of metal and composite sheets using impact hydraulic pressure is investigated. The sheet is mounted in contact with the die face that locates at the bottom end of the cylinder. The piston at the top end is impacted by a drop-hammer with 10 m/s velocity, by which very high pressure is put on the sheet face to induce shear force at die edge. The die hole is circular, square or rhombic. The test materials are pure aluminum and its alloy, pure titanium, stainless steel and carbon fiber reinforcement plastic (CFRP) sheets. The cut surface is rather rough and the shear drop is larger compared with that in conventional punching. Burr generation is successfully suppressed for the metallic materials. Interlaminar fracture of CFRP sheet occurs in the hole vicinity. Corner radius of the square and rhombic holes is rounded. Counter punch in the die cavity is useful for improving shape accuracy.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
