Etapele operațiunii de prelucrare a găurii fine cu bară rotundă din carbură

 La prelucrarea unor găuri de înaltă precizie pe piese mecanice, alezarea poate fi înlocuită cu găurirea cu bară rotundă din carbură. Când se prelucrează găuri de precizie non-standard, este ușor de operat și se poate adapta la prelucrarea diferitelor materiale metalice. The reaming of alloy round bar drill is a kind of finishing hole operation, which is based on the existing holes and then processed by the reaming of the modified and ground bit.

   Use a bit that is relatively new or whose dimensional accuracy of each part is close to the tolerance requirements. Because the drill bit will wear after being used for many times, it will affect the hole diameter accuracy. The two cutting edges of the bit shall be grinded symmetrically as much as possible, and the axial runout of the two edges shall be controlled within 0.05mm, so that the load of the two edges is even, so as to enhance the cutting stability. The radial runout of the bit shall be less than 0.003mm. Pre drilling can not produce more cold hard layer, otherwise it will increase drilling load and wear fine hole cemented carbide round bar.