Influence of Clearance and Punch Velocity on the Quality of Pure Thin Copper Sheets Blanked Parts

[摘要] Research on the influence of clearance and punch velocity to determine the quality of the punched edge were conducted. This study uses pure copper sheet material with the clearance variation of 2.5, 5, 7.5 and 10%. Punch velocity is based on the ability of about Micro Punch CNC machine which is 100 and 2600 mm/min. At highest speed with a clearance of 2.5%, sheared zone is of about 395 pm or 79% of the material thickness. It can be concluded that the punch velocity gives positive influence on the sheared zone in copper. Basically the ideal outcome of the sheared edge of punching result is having rollover and small burr and contain at least 75% of the shear zone. This can be achieved with a clearance of 2.5%.

[发布机构] Department of Mechanical and Industrial Engineering, Faculty of Engineering, Gadjah Mada University, Jl. Grafika No.02, Yogyakarta; 55281, Indonesia^1

[效力级别] 无线电电子学

[关键词] Clearance variation;CNC machine;Copper sheets;Material thickness;Pure copper;Shear zone