Abstract: Collar forming apparatus for forming an upstanding flange around an existing hole in a tube or plate comprising a pair of forming members mounted on and movable axially and radially with respect to the forming head between retracted positions and extending collar forming positions displaced axially and radially away from the retracted positions wherein at least portions of the forming members underlie the edge of the wall surrounding the opening. The forming members are moved to their collar forming positions by a wedge member that is movable axially with respect to the forming head to a predetermined axial position. Abutment means in the form of cooperating surface portions on the wedge member and the formation means acts between the wedge member and the formation means to impart radial and axial forces on the formation means when the wedge member is moved to its predetermined axial position to move the forming members to their collar forming positions.
Abstract: A tube trimming device for cutting each of a plurality of closely spaced projecting tubes an equal distance from a reference or support wall. The device comprises inner and outer tubular housing members that are telescoped together for relative sliding movement through a limited range of travel. A spring extends the two members. A stationary bushing is connected to the projecting end of the inner member to set the desired location of a cutter wheel rotatably mounted on one end of an arm that is pivotally connected to the inner member on the inside. The other end of the pivoted arm has a cam follower that rides on a conical cam surface of the outer member. The tubular inner member is inserted over the projecting end of the tube to be cut, with the stationary bushing pressed against the reference wall. The outer housing is rotatably driven by a motor while, at the same time, the outer housing is pushed toward the reference wall.