Roof laser brazing system

Abstract

A roof laser brazing system comprises a side home position jig installed at each of opposite sides of the transferring path of the body in the brazing section, a roof-pressing jig detachably mounted on a handling robot, docked to the side home position jig, and that home-positions and presses the roof panel loaded on the opposite side panels, a brazing assembly mounted on at least one brazing robot in the side home position jig side and that brazes bonding portions between the opposite side panels and the roof panel using a laser as a heat source, and a grinding assembly mounted on the at least one grinding robot in the grinding section and that grinds brazing beads of the bonding portions between the opposite side panels and the roof panel.

What is claimed is: 
     
         1 . A roof laser brazing system which laser-brazes a roof panel to opposite side panels based on a body including the opposite side panels, comprising:
 a side home position jig installed at each of opposite sides of a transferring path of the body in a brazing section set along the transferring path of the body and that restricts the opposite side panels of the body;   a roof-pressing jig detachably mounted on a handling robot, that is docked to the side home position jig, and that home-positions and presses the roof panel loaded on the opposite side panels;   a brazing assembly mounted on at least one brazing robot in the side home position jig side and that brazes bonding portions between the opposite side panels and the roof panel using a laser as a heat source;   a gap measurement unit mounted on the brazing assembly and that measures matching gaps between the roof panel and the opposite side panels that are pressed by the roof-pressing jig; and   a grinding assembly mounted on at least one grinding robot in a grinding section set along the transferring path of the body and that grinds brazing beads of the bonding portions between the opposite side panels and the roof panel,   wherein the brazing assembly includes:   a brazing bracket mounted on the at least one brazing robot;   a laser head installed at the brazing bracket and that irradiates a laser beam to the bonding portions between the opposite side panels and the roof panel; and   a wire feeder provided in the brazing bracket and that supplies a filler wire to a focus position of the laser beam.   
     
     
         2 . The roof laser brazing system of  claim 1 , wherein the gap measurement unit includes a profile sensor installed at the brazing bracket, that scans matching portions between the opposite side panels and the roof panel, and that measures gaps of the matching portions. 
     
     
         3 . The roof laser brazing system of  claim 2 , wherein an operating cylinder is fixedly installed at the brazing bracket, and
 a sensor bracket to which the profile sensor is fixed is connected to an operating rod of the operating cylinder.   
     
     
         4 . The roof laser brazing system of  claim 3 , wherein the sensor bracket includes an air blower jetting air and an air jet passage connected to the air blower, and the air is jetted in a direction perpendicular to an irradiation direction of the laser beam through the air jet passage. 
     
     
         5 . A roof laser brazing system which laser-brazes a roof panel to opposite side panels based on a body including the opposite side panels, comprising:
 a side home position jig installed at each of opposite sides of a transferring path of the body in a brazing section set along the transferring path of the body and that restricts the opposite side panels of the body;   a roof-pressing jig detachably mounted on a handling robot, that is docked to the side home position jig, and that home-positions and presses the roof panel loaded on the opposite side panels;   a brazing assembly mounted on at least one brazing robot in the side home position jig side and that brazes bonding portions between the opposite side panels and the roof panel using a laser as a heat source;   a gap measurement unit mounted on the brazing assembly and that measures matching gaps between the roof panel and the opposite side panels that are pressed by the roof-pressing jig; and   a grinding assembly mounted on at least one grinding robot in a grinding section set along the transferring path of the body and that grinds brazing beads of the bonding portions between the opposite side panels and the roof panel,   wherein the grinding assembly includes:   a grinding bracket mounted on the grinding robot;   a grinding motor installed at the grinding bracket to be vertically movable;   a grinding wheel coupled to a drive shaft of the grinding motor;   a moving plate connected to the drive shaft of the grinding motor through a bushing and that is installed at the grinding bracket to be vertically movable;   a wheel cover mounted on the grinding bracket to cover the grinding wheel and at which an inlet sucking grinding-dust particles scattered by the grinding wheel is installed;   a pressure control cylinder fixedly installed at the grinding bracket, that is connected to the moving plate, and that controls a grind-pressing force of the grinding wheel; and   a stopper cylinder fixedly installed at the grinding bracket and that selectively limits movement of the moving plate.