POWER DRIVEN CUTTER FOR CUTTING TUBES Russian patent published in 2007 - IPC B23K7/00 F23D14/42 

FIELD: welding equipment, namely power driven cutters for cutting tubes, possibly at building main pipelines in condition of limited space.

SUBSTANCE: shank of cutter is bent; bending angle between axes of housing and head of cutter is no less than 120 -150°. Unit for securing cutter to carriage includes rotary ring with locking member and limb. Rotary ring is coaxially arranged in head of cutter and it is joined with head of cutter by means of locking member. Axis of limb is rigidly joined with rotary limb normally relative to axis of ring for rotating head in plane normal to axis of limb. Body of limb has kinematics coupling with platform of carriage. Apparatus for mixing heating oxygen and combustible gas is in the form of mixer joined with head for restricting annular chambers of heating oxygen and combustible gas and it has central duct for supplying cutting oxygen communicated with central duct of inner mouthpiece for feeding cutting oxygen. Said annular chambers of heating oxygen and combustible gas are communicated through mixer with unit for supplying combustible mixture. Outlets of housing through tubes for feeding cutting and heating oxygen and combustible gas are communicated with head inlets that are communicated with respective openings of head. Said openings of head are communicated with chambers of heating oxygen and combustible gas and with central duct of mixer for feeding cutting oxygen.

EFFECT: possibility for regulating chamfer of cut edge of material, simplified design, lowered cost of cutter, enhanced safety of its operation.

2 cl, 6 dwg