Weld bead removing apparatus

Claim 2

Apparatus for continuously removing a weld bead from the inner surface of a welded metallic tube comprising; means for cylindrically forming a metallic strip and butt welding both edges of said metallic strip, a rotary cutter, said rotary cutter being positioned relative to said means for forming and welding said metallic strip so as to be disposed within the formed tube just beyond the location where the edges are welded together for cutting the internal bead on the inner surface of said tube in the vicinity of the welding point of said tube where the temperature of the weld bead is close to the melting point of the metal, a rotary shaft carrying said rotary cutter at one end thereof, driving means adapted to be connected with the opposite end of said rotary shaft and operating to rotate said rotary shaft at high speed, and means for rotatably supporting said rotary shaft and resiliently pressing said rotary cutter against the internal weld bead of said tube.

Claim 3

Apparatus for continuously removing a weld bead from the inner surface of a welded metallic tube comprising; means for cylindrically forming a metallic strip and butt welding both edges thereof, a rotary cutter, said rotary cutter being positioned relative to said means for forming and welding said metallic strip so as to be disposed within the formed tube just beyond the location where the edges are welded together for cutting the internal beah on the inner surface of said tube in the vicinity of the welding point of the tube where the temperature of the weld bead is close to the melting point of the metal, a rotary shaft carrying said rotary cutter at one end thereof and provided with a flange fixedly attached thereto, driving means adapted to be connected with the opposite end of said rotary shaft operative to rotate said shaft at a high speed, supporting means including a stationary structure supporting a holder through a pin and resilient means, said holder and a sleeve screwed to said holder having bearings therein to rotatably support said rotary shaft, said resilient means serving to resiliently press said rotary cutter against the internal weld bead of said tube, said rotary cutter being hinged on said pin through said sleeve, holder and rotary shaft, and thrust metals provided on said holder and being engagable with said flange to limit the axial movement of said rotary shaft, and passage means including a port in said holder, a clearance between said rotary shaft and said sleeve, a hole in said sleeve and a clearance between a hollow impeder and a plastic tube both circumscribing said rotary shaft for supplying coolant to said impeder and said rotary cutter.

Claim 4

Apparatus for continuously removing a weld bead from the inner surface of a welded metallic tube comprising; means for cylindrically forming a metallic strip and butt welding both edges thereof, a rotary cutter, said rotary cutter being positioned relative to said means for forming and welding said metallic strip so as to be disposed within the formed tube just beyond the location where the edges are welded together for cutting the internal beah on the inner surface of said tube in the vicinity of the welding point of the tube where the temperature of the weld bead is close to the melting point of the metal, a rotary shaft carrying said rotary cutter at one end thereof and provided with a flange fixedly attached thereto, driving means adapted to be connected with the opposite end of said rotary shaft operative to rotate said shaft at a high speed, supporting means including a stationary structure supporting a holder through a pin and resilient means, said holder and a sleeve screwed to said holder having bearings therein to rotatably support said rotary shaft, said resilient means serving to resiliently press said rotary cutter against the internal weld bead of said tube, said rotary cutter being hinged on said pin through said sleeve, holder and rotary shaft, and thrust metals provided on said holder and being engagable with said flange to limit the axial movement of said rotary shaft, and passage means including a port in said holder, a clearance between said rotary shaft and said sleeve, a hole in said sleeve and a clearance between a hollow impeder and a plastic tube both circumscribing said rotary shaft for supplying coolant to said impeder and said rotary cutter.

Claim 5

Apparatus according to claim 1, wherein said driving means is disposed on the outside of said metallic strip to be welded and is connected with the other end of said rotary shaft through a flexible shaft.

Claim 6

Apparatus according to claim 2 wherein said hollow impeder is mounted on the sleeve of said supporting means.

Claim 7

Apparatus according to claim 1 wherein said rotary cutter is disposed with flat edges spirally extending along the cylindrical surface thereof.