Cylinder liners are divided into dry cylinder liners and wet cylinder liners. The cylinder liner whose back does not contact the cooling water is called a dry cylinder liner, and the cylinder liner whose back contacts the cooling water is a wet cylinder liner. The dry cylinder liner has the advantages of thin thickness, simple structure and convenient processing. The wet cylinder liner directly contacts the cooling water, so it is conducive to the cooling of the engine and the small and lightweight of the engine.

Process flow

Cylinder barrel: blanking - rough turning - heat treatment (quenching and tempering) - turning (flat head chamfering) - rough pushing inner hole - rolling inner hole - turning (outer circle open frame nest) - inner hole stop - welding cylinder bottom - turning (outer circle) and internal galvanizing or chromium plating as required.