ELECTRIC PIPE EXPANDER

Abstract

An electric pipe expander and intelligent control circuit for the electric pipe expander are provided. The electric pipe expander includes a pipe expander body and a mandrel sliding cavity disposed on the pipe expander body. A chuck body capable of clamping a pipe to be processed is disposed at an opening end of the mandrel sliding cavity. A mandrel is slidingly connected in the mandrel sliding cavity, an outer side end of the mandrel is provided with an obliquely disposed pipe expanding cone, an inner side end of the mandrel is provided with an elastic body accommodating cavity. Flat keys are disposed on the mandrel, and an elastic body is clamped and disposed between the flat keys and a bottom surface of the elastic body accommodating cavity.

Description

Claims

1. An electric pipe expander, comprising: a pipe expander body; anda 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 thereof is opened 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, anda flat key is provided on the mandrel,an outer side end of the flat key is slidingly connected to the worm gear mechanism in an axial direction, an inner side end 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 the deformation amount the one-circumferential axial feed is reduced, and a circumferential shape of a flare of the pipe to be processed tends to be uniform.

2. The electric pipe expander according to claim 1, wherein a cone positioning hole is provided on an end surface of the mandrel corresponding to the pipe expanding cone, an axis of the cone positioning hole forms an included angle with an axis of the mandrel, and the pipe expanding cone is rotatably connected in the cone positioning hole via a cone bearing.

3. The electric pipe expander according to claim 1, wherein a mandrel bearing is embedded in the pipe expander body corresponding to an outer side end of the mandrel, a support ring is provided between a central hole of the mandrel bearing and an outer ring surface of the mandrel, and an inner end of the support ring extends into a central hole of a worm wheel on the worm gear mechanism and is tightly fitted with the worm wheel.

4. The electric pipe expander according to claim 1, wherein a pipe expanding cavity is provided on the pipe expander body corresponding to the clamping head body, a clamping end of the clamping head body extends into the pipe expanding cavity and is clamped and fixed via a clamping link mechanism, and an outer end surface thereof abuts against an inner wall surface corresponding to the pipe expanding cavity.

5. The electric pipe expander according to claim 4, wherein a link accommodating cavity is provided on a pipe expander body corresponding to a periphery of the pipe expanding cavity, a clamping link mechanism is provided in the link accommodating cavity, a pressing plate corresponding to one end of the clamping link mechanism extends into the pipe expanding cavity, and the other end is connected to a linkage wrench extending outside the pipe expander body.

6. The electric pipe expander according to claim 5, wherein an adjusting screw is rotatably connected to the pipe expander body, and when the adjusting screw is rotated, the link mechanism is driven, and the pressing plate is clamped and abutted on a side wall of the clamping head body.

7. The electric pipe expander according to claim 4, wherein an end portion of the pressing plate corresponding to the clamping head body extends horizontally and outwardly to form a trapezoidal pressing head, a side wall of the clamping head body corresponding to the trapezoidal pressing head is provided with a trapezoidal clamping opening, and when the clamping head body is clamped by the pressing plate, the pressing plate abuts on a bottom surface of the trapezoidal clamping opening via a bottom edge of the trapezoidal pressing head, and abuts on a sloping edge below the trapezoidal clamping opening via a sloping edge below the trapezoidal pressing head.

8. The electric pipe expander according to claim 1, wherein an outer cover of the pipe expander body is provided with a plastic housing, the plastic housing in turn extends outwards to form an electric motor accommodating cavity, an electric motor is provided in the electric motor accommodating cavity, an output shaft end of the electric motor is connected to a worm gear mechanism, and the other end of the electric motor is electrically connected to a rechargeable battery.

9. The electric pipe expander according to claim 1, wherein the clamping head body comprises a left clamping body and a right clamping body, middle portions of the left clamping body and the right clamping body are rotatably connected to a rotary shaft, the left clamping body and the right clamping body corresponding to one side of the rotary shaft form a clamping end for clamping the pipe to be processed, and the left clamping body and the right clamping body corresponding to the other side respectively form a force application handle.