Electric pipe expander

A method of using an electric pipe expander, the method comprising:

• providing an electric pipe expander having:
• a pipe expander body;
• a mandrel sliding cavity provided on the pipe expander body, the mandrel sliding cavity defining an opening;
• a clamping head body mounted at an end of the opening of the mandrel sliding cavity, the clamping head body adapted to clamp a pipe to be processed;
• a mandrel slidably mounted in the mandrel sliding cavity, an outer side end of the mandrel comprising an inclined pipe expanding cone, and an inner surface of the opening comprises an elastomer accommodating cavity;
• a guide screw comprising a drive nut coupled to the pipe expander body opposite to an opening of the elastomer accommodating cavity, the guide screw extending into the elastomer accommodating cavity;
• and
• a flat key provided on the mandrel, an outer side end of the flat key is slidingly connected to a worm gear mechanism in an axial direction, an inner side end of the flat key is slidingly connected to an axial key groove of the drive nut, and an elastomer is located between the flat key and a bottom surface of the elastomer accommodating cavity, the elastomer is an annular rubber piece, and the guide screw extends into a central hole of the elastomer, by deforming the elastomer itself, an axial moving speed of the mandrel is reduced, and a circumferential shape of a flare of the pipe becomes uniform;
• providing the pipe;
• clamping the pipe in the clamping head body;
• activating the mandrel;
• and
• deforming an end of the pipe into a flare.