Punch Geometry and Burr Height on Blanking Process for Garbage Container Wheel Parts

Sheet metal punching process is a manufacturing method frequently used in many industries such as packaging, construction, aerospace, machinery, chemistry and electronics. Today, a large number of parts are produced from hair materials in almost all areas of industry. The fact that the parts produced are generally in the millions and that delivery times are limited increases the importance of molds day by day. During production, it is desirable that the wear rate of the mold be kept to a minimum, that it does not cause problems during operation, that it be suitable for mass production of parts, and that the dimensional tolerances of the produced parts remain within the specified limits. In this study, holes were obtained with punches with different geometric surfaces and punch performances were evaluated by comparing average burr heights. As a result of the study, burr height increased with increasing stroke. Plain punch showed the best performance, while the worst performance and burr height were obtained with channel punch. TiN coated channel punch was among these two punches. The performance difference between plain punch and channel punch was around 10%.