扩管机是一种从换热器、散热器等所用圆管的内管面将管径扩大，以便将其和管座或管板相联接的一种工具，它是由支架、转子、心轴等3个主要零件组成。生产厂家承制换热器、散热器、冷却器等设备时，根据设计要求，多数要进行管口扩管。通常用扩管机，扩孔成锥形孔，管口变形不均 A pipe expanding machine is a kind of tool which enlarges the pipe diameter from the inner pipe surface of a pipe used for heat exchangers, radiators and the like so as to be connected with the pipe seat or the pipe board. The pipe expanding machine is composed of a bracket, a rotor, a heart Axis and other three major components. Manufacturers of heat exchangers, radiators, coolers and other equipment, according to design requirements, the majority of the nozzle expansion. Usually with a pipe expanding machine, reaming hole into a tapered hole, nozzle uneven deformation