Electric pipe expander

An electric pipe expander, comprising:

• a pipe expander body;
• and
• a mandrel sliding cavity provided on the pipe expander body,
• wherein a clamping head body capable of clamping a pipe to be processed is provided at an opening end of the mandrel sliding cavity,
• a mandrel is slidably connected in the mandrel sliding cavity,
• an outer side end of the mandrel is provided with an inclined pipe expanding cone, an inner side end of the mandrel is provided with with an elastomer accommodating cavity,
• a guide screw with a drive nut is provided on the pipe expander body opposite to an opening of the elastomer accommodating cavity,
• the guide screw extends into the elastomer accommodating cavity, and
• a flat key is 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 sandwiched 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.