A Circularity Analysis of Different Clearances in the Sheet Metal Punching Process
V Bram Armunanto1, Yudit Cahyantoro NS2, Kaleb Priyanto3
1V Bram Armunanto, Mechanical Engineering, Sebelas Maret University, Surakarta, Indonesia.
2Yudit CNS, Mechanical Engineering, Sebelas Maret University, Surakarta, Indonesia.
3Kaleb Priyanto, Mechanical Engineering Sebelas Maret University, Surakarta, Indonesia.
Manuscript received on November 24, 2012. | Revised Manuscript received on December 13, 2012. | Manuscript published on December 30, 2012. | PP: 277-280 | Volume-2, Issue-2, December 2012.  | Retrieval Number: B0936112212 /2012©BEIESP

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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Nowadays, technological development demands efficiency of time and energy in all fields in order to create a product that can compete in the global market. Breakthroughs and innovations are needed merely to survive in manufacturing industry. Punching is the common process of using a cutting punch and die in the manufacturing process. A variety of physical phenomena occur in the metal cutting process such as metal flow, friction between the material and tools, process heat and changes in the microstructure of the material. Much research conerning dimensions, tolerances, cutting angles and cutting force has been carried out. This article discusses and examines the relationship between clearance, punch and dies circularity and circularity of the product of the punching process. Testing has been conducted using various punches with different diameters and different circularity conditions. The Coordinate Measuring Machine (CMM) which has an accuracy of 1 micron was used to measure the diameter of the punch and the dies, the clearance and circularity of the punch and dies, and the resulting product. The question is: is the circularity of the product of punching affected by the clearance or by the circularity of such tools.
Keywords:  CMM.