New aluminium grooving geometry

摘要

Troublesome snarl chips are not uncommon when turning and grooving aluminium materials, causing damage to sensitive, finished surfaces and even compromising process reliability. To prevent these, HORN has developed a new WA geometry especially for grooving and parting off aluminium for the S100 and S224 grooving systems. This involves a precision-ground, sharp, positive cutting edge, for grooving widths of 2 and 3 mm and grooving depths of up to 18 mm. The polished chip-shape geometry serves to counteract the formation of built-up edges whilst only creating small, spiral chips, thereby ensuring excellent chip control and a high level of process reliability. The adapted chip tapering prevents flank damage while grooving to establish a premium level of surface quality. The WA geometry ensures an accurate and easy cutting process when grooving, parting off and finish-grooving. The optimum feed rate (f) is between 0.07 and 0.25 mm/rev. In addi-I tion to the uncoated design in the K10 model, HORN also offers an alternative with the smooth DD25 coating for machining aluminium with a higher silicon content. This also ensures that there is virtually no formation of built-up edges.