The invention discloses a
machining method for
deep hole of
marine engine connecting rod. The method comprises the following steps: Firstly, a tool is installed for positioning the connecting rod on the work table of the
machine tool, and a total of four main axes is arranged on the
machine tool, each of which is provided with a
gun drill. Secondly, the connecting rod to be processed is fixed to the tooling. Thirdly, the table is fast moved to the first
station, so that the first spindle and the second spindle on the
gun drill slowly into the tooling of the guide sleeve hole, while
processing two lower bolts of connecting rod through the hole. Fourthly, the table is fast moved to the second
station, so that the third spindle and the fourth spindle on the
gun drill slowly into the tooling guide sleeve hole, while
processing two head bolts of connecting rod through the hole. Fifthly, when
processing is completed, the table is moved back to the reference point. The invention can complete all the processing, and the clamping operation is simple, and the processing efficiency is high, and the invention also can reduce the
processing cost twice, and the dimensional accuracy, the shape and
position tolerance are easy to be guaranteed.