文献类型：专利

英文题名：Hard alloy twist drill, has circumferential locating blocks equipped in circumferential locating slots at two sides of drill bit, and fastening bolt equipped in thread hole and contacted with radial locating block at center of drill bit

作者：HE Y;LI C;WANG S;YAO X

机构：[1]UNIV EAST CHINA SCI&TECHNOLOGY;[2]ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD;[3]ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS C

申请号：CN101733451-B

公开日：2012-10-10

语种：英文

收录：DERWENT

摘要：NOVELTY - The drill has a drill bit (2) having a bottom end surface whose center is equipped with a radial locating block (21). Center of a top end surface of a drill rod (1) is equipped with a radial locating slot (11). Two sides of the rod are equipped with circumferential locating blocks (12). The rod is equipped with a thread hole (13) passing through a side wall of the locating slot. The circumferential locating blocks are equipped in circumferential locating slots (22) at two sides of the drill bit. A fastening bolt (3) is equipped in the thread hole and contacted with the radial locating block. USE - Hard alloy twist drill. ADVANTAGE - The drill has simple structure and high precise, and is stable and reliable to locate and convenient to process. DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a hard alloy twist drill. Drill rod (1) Drill bit (2) Fastening bolt (3) Radial locating slot (11) Circumferential locating blocks (12) Thread hole (13) Radial locating block (21) Circumferential locating slots (22)