Pin hole rough-boring and aligning device for piston

The invention discloses pin hole rough-boring and aligning device for a piston. The pin hole rough-boring and aligning device comprises a machine tool, wherein a base is arranged on the machine tool; a spigot base is arranged on the base; a clamping block connected with the machine tool is further arranged above the spigot base; one side of the machine tool is provided with a boring rod; the other side of the machine tool is provided with a transverse-L-shaped bottom plate; a hinge plate is fixedly arranged on the transverse-L-shaped bottom plate; and the hinge plate is provided with a pin hole aligning block opposite to the boring rod. The pin hole rough-boring and aligning device is simple in structure and is convenient to operate; when the working efficiency is improved, the pin hole rough boring precision is improved, and the processed product is stable in quality. 本发明种活塞粗镗销孔对中装置，包括机床，所述机床上设置有底座，所述底座上设置有止口座，所述止口座正上方设置有与机床连接的夹紧块，所述机床侧设置有镗杆；所述机床另侧设置有"﹁"型底板，所述"﹁"型底板上固定有铰链板，所述铰链板设置有与镗杆相对的销孔对中块。本发明结构简单，操作方便，在提