Analisa Burr Dengan Variasi Ketebalan Lembaran Aluminium Pada Proses Double Punch

Making a hole in the industrial world one of them can be done using punching tool. In this research the process of perforation is called the piercing process, because the result of perforation is the material that is attached to the progressive dies. The quality of a good hole slightly has a burr or fracture side. The punch diameter used was 6 mm and the diameter of the dies was 6.04 mm because the clearance between punch and dies was 0.04 mm. The material used is in the form of aluminum sheet which has two types of thickness variations, namely 0.8 mm and 1.2 mm thickness. In the process of punching / piercing for each material has six holes each. Burr retrieval and hole edge quality characteristics using macro photographs of a macro microscope each having magnification 5.6 x. From the results of the burr measurement, for burr with thickness of aluminum sheet with 0.8 mm thick has the lowest burr length of 0.286 mm and the highest burr length of 0.405, while on the aluminum sheet with 1.2 mm thick has burr with the lowest length of 0.169 mm And burr terpanajang 0.339 mm. From the overall average for each material, on materials with a thickness of 0.8 mm has an average burr value of 0.324 mm and a thickness of 1.2 mm material has a mean burr of 0.364 mm