Method for making a cylinder

摘要

A cylinder housing ( 1 ) is cast with a cylinder wall ( 2 ) in the making of a cylinder for an internal combustion engine. The cylinder wall delimits an interior space ( 3 ) for accommodating a reciprocating piston and, thereafter, a control window ( 5 ) is machined into the cylinder wall ( 2 ) as an opening of a transfer channel ( 4 ) into the interior space ( 3 ). A two-stage machining for forming the control window ( 5 ) is provided in order to make possible a rapid and cost effective manufacture of the cylinder. In a first step with a work tool ( 7 ) having a rotating primary movement ( 11 ), a breakthrough ( 10 ) is machined into the cylinder wall ( 2 ) and, in a second step with a work tool, the breakthrough ( 10 ) is widened to the wanted dimensions of the control window ( 5 ).