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.

This disclosure enables various bits to widen (e.g., flare, swage) various open end portions (e.g., with a circular cross-section) of various tubes (e.g., a metal tube, an alloy tube, a copper tube, an aluminum tube) by engaging thereagainst.

A hydraulic tube expander includes expanding jaws engageable with an interior surface of a tube to expand the tube; a source of hydraulic fluid, a valve located between the source and the expanding jaws and a single-action release actuator operatively coupled to the valve. The valve is moveable between open and closed positions. In the closed position, hydraulic fluid can pass from the source to the expanding jaws and in the open position the hydraulic fluid can pass from the expanding jaws to the source. The actuator is movable between first and second positions. In the first position the valve is in the closed position. Movement of the actuator in a direction from the first position toward the second position moves the valve into the open position.

A tool including a front housing and an expander head ring that is readily attachable and detachable from the front housing. The front housing may be coupled to the tool body, or can be integral with the tool body. The front housing may have a mating end that has one or more locking tabs that are configured to be engaged by the expander head ring. The expander head ring may carry one or more functional elements such as a die set that may be expanded by insertion of an expander extending from the tool such as by manual actuation of the tool. A plurality of expander head rings, each with a different size die set, can be alternatively attached to the front housing, depending on the desired extent of expanding of the pipe or the like with the tool.

A pipe enlarging device includes a base, an operation unit and a clamping unit. The clamping unit is received in the base, and includes movable front and rear clamps and a front threaded rod. The front and rear clamps are resiliently movable when the front threaded rod is rotated so as to form an adjustable clamping area between the front and rear clamps. The clamping area is used to clamp pipes of different sizes. The operation unit includes a top threaded rod with a cone-shaped member which is used to enlarge the inner diameter of the pipes.

A flaring tool for flaring an end of a tube includes a locking mechanism having a collar and a collet with two or more collet pieces. As the collet is moved relative to the collar from a non-locking position toward a locking position, the collar engages outer surfaces of the collet pieces and causes the collet pieces to move from a non-clamping position toward a clamping position. As the collet pieces are urged radially inward, they each pivot about a respective pivot axis. As the collet moves further toward the locking position and the collet pieces move further toward the clamping position, the pivot axis of each of the collet pieces radially moves relative to the collet body and the collar. A flaring mechanism moves a flaring mandrel towards the end of the tube when the collet is clamped, whereby the mandrel engages and flares the end of the tube.

A pipe enlarging device includes a base, an operation unit and a clamping unit. The clamping unit is received in the base and includes movable front, rear, left and right clamps, multiple resilient members and a front threaded rod. The front, rear, left and right clamps are resiliently movable when the front threaded rod is rotated so as to form an adjustable clamping area between the front, rear, left and right clamps. The clamping area is used to clamp pipes of different sizes. The operation unit includes a top threaded rod with a cone-shaped member which is used to enlarge the inner diameter of the pipes.

A swage mechanism operable to expand an inner diameter of tubing including a housing defining a longitudinal axis, and a plurality of jaws coupled to the housing and movable radially outward relative to the longitudinal axis for selectively gripping an interior of the tubing. The jaws each include a first cam surface. The swage mechanism further includes a ram having a cylindrical portion and a frusto-conical head portion, and an arbor that is coupled to the housing and having a second cam surface. The frusto-conical head portion of the ram is insertable into the tubing to expand the inner diameter of the tubing. The second cam surface of the arbor is engageable with the first cam surface of each of the jaws to move the jaws toward or away from the longitudinal axis, wherein the second cam surface moves in a direction along the longitudinal axis.

A hydraulic tube expander includes expanding jaws engageable with an interior surface of a tube to expand the tube; a source of hydraulic fluid, a valve located between the source and the expanding jaws and a single-action release actuator operatively coupled to the valve. The valve is moveable between open and closed positions. In the closed position, hydraulic fluid can pass from the source to the expanding jaws and in the open position the hydraulic fluid can pass from the expanding jaws to the source. The actuator is movable between first and second positions. In the first position the valve is in the closed position. Movement of the actuator in a direction from the first position toward the second position moves the valve into the open position.

Tube flaring tool comprising a tube receiving region comprising first and second gripping dies retractable with respect to each other and positionable to cooperatively define an opening for receiving a tube; a first clutch shaft; a support housing having a bore for receiving a second clutch shaft; a clutch plate; a flare forming head operable to flare the free end of the tube; and a biasing member urging the flare forming head axially. The first clutch shaft may have an outer configuration adapted to be engaged by a 12 point or square drive SAE ratchet wrench for creating mechanical advantage to actuate the flare forming head. When the force that the biasing member urges the flare forming head axially is overcome, the clutch plate disengages from the second clutch shaft such that further actuation of the first clutch shaft does not rotate the flare forming head shaft, preventing over-flaring.