H BEAM BENDING MACHINE FOR CONVENIENTLY INPUTTING HEAVY H BEAM INTO BENDING MACHINE AND MOUNTING SUBSIDIARY TENSILE ROLLER FOR SUPPORTING WAVE OF THE H BEAM AND PULLING INNER SURFACE OF WING PART TO MINIMIZE SIZE OF ROUND OF H BEAM WAVE AND PERFORM UNIFORM BENDING

摘要

PURPOSE: To provide a H beam bending machine capable of bending a large H beam in the cold working state by attaching a H beam feeder and subsidiary pressing roller to the bending machine, preventing distortion of H beam wave formed during bending by using a subsidiary tensile roller, and conveniently performing bending operation and obtaining H beam with superior strength by inputting the large H beam into the bending machine so that the H beam is bent while it is being easily transferred. CONSTITUTION: In a bending machine comprising a pressing roller mounted on a pressing roller installation stand to guiding grooves of which the guiding bars are connected by forming guiding bars(11) mounted on upper and lower sides of the pressing roller between a pair of driving rollers mounted on a central part of main body(1), the H beam bending machine comprises a subsidiary tensile roller installation stand(31) on a surface oppositely directed to the pressing roller of which upper and lower subsidiary tensile rollers are mounted, on upper and lower parts of which a guiding groove is formed so that the subsidiary tensile roller installation stand is moved forward and backward by inserting the guiding bars(11) into the guiding grooves; supporting rollers comprising adjusting shafts which are mounted on both sides of the subsidiary tensile rollers and the pressing roller, on an upper part of the outer circumference of which high-handed screws(702) are formed, and a lower part of which left-handed screws(7002) are formed, and supporting roller connectors on which screw hole and guiding hole are formed, and which are screw connected to adjusting shafts by passing supporting bars(73) through the guiding holes of the supporting roller connectors; a push roller(4) comprising a driving gear(51) engaged with a driving gear(13) connected to a hydraulic motor(12) such that the driving gear is mounted on the central shaft of the driving roller by penetratingly projecting a central shaft of a driving roller(5) from an upper part of the main body, the driving roller mounted on an outer side of the supporting rollers, and a push roller installation stand(41) on upper and lower parts of which a guiding groove is formed, and into the guiding groove of which guiding bars(111) formed on the main body are inserted so that the push roller installation stand is moved forward and backward by a hydraulic cylinder, the push roller mounted on the push roller installation stand oppositely to the driving roll; and input rollers(6,6') comprising screw shafts(603) mounted on both ends of the outer side of the main body, and adjusting members(62) screw connected to the screw shafts and mounted on upper and lower parts of the input rollers to fix the position of the input rollers by passing screw shafts through a through hole of input roller connectors(61).