METHOD OF MANUFACTURING A LOWER CASE FOR A GAS METER CAPABLE OF ACCURATELY MAINTAINING FLATNESS, PERPENDICULARITY AND HORIZONTALITY THROUGH PROCESSING OF THE PROTRUSION OF A LOWER CASE MANUFACTURED BY CASTING

摘要

PURPOSE: A method of manufacturing a lower case for a gas meter is provided to reduce tolerance due to assembling by improving assembling precision by adjusting the height level, flatness and horizontality of a valve seat plate and a valve seat.;CONSTITUTION: A method of manufacturing a lower case for a gas meter comprises next steps. At least two protrusions(11) are formed on the part assembling unit of the top of a lower case(10). The height level, flatness and horizontality of the protrusion of the part assembling unit of the lower case are adjusted by a processing unit. The part assembling unit with the protrusion on the lower case is a crank bridge assembling unit. The part assembling unit with the protrusion on the lower case is a valve seat plate assembling unit. The protrusion on the part assembling unit of the lower case is a reference surface in a recycling process.;COPYRIGHT KIPO 2012