Main buck unit for vehicle body assembling system and control method of the same

Abstract

A vehicle body assembling system forms a pre-buck section and a main buck section set along a transfer path of a floor assembly. A main buck unit is set at opposite sides of the transfer path in the main buck section, controls an upper portion of a side assembly in a state that a lower portion of each side assembly is pre-assembled to the floor assembly the pre-buck section, and assembles the upper portion of the side assembly and vehicle body parts using a second welding robot.

1 . A vehicle body assembling system, comprising:
 a pre-buck unit including a pre-buck section and a main buck unit including a main buck section that are set along a transfer path of a floor assembly,   wherein the main buck unit is formed in the main buck section, and while a side assembly is provided in each of opposite sides of a transfer path in the main buck section and a lower portion of each side assembly is pre-assembled to the floor assembly by the pre-buck unit, the vehicle body assembling system controls an upper portion of each side assembly and assembles the upper portion of each side assembly and vehicle body parts using a second welding robot.   
     
     
         2 . The vehicle body assembling system of  claim 1 , wherein, while the lower portion of each side assembly is welded to the floor assembly by the pre-buck unit, the main buck unit controls a width direction of the side assembly and welds the upper portion of the side assembly and the vehicle body parts using the second welding robot. 
     
     
         3 . The vehicle body assembling system of  claim 1 , wherein the main buck unit comprises a loading portion that controls the vehicle body parts that include a cowl, a roof rail, and a package tray and placing of the vehicle body parts in a regular position in the upper portion of the side assembly. 
     
     
         4 . The vehicle body assembling system of  claim 1 , wherein the main buck unit comprises a plurality of side jigs that control the upper portion of the side assembly that is different depending on a type of a vehicle, and a 4-sided rotation index that fixes the side jig. 
     
     
         5 . The vehicle body assembling system of  claim 4 , wherein the main buck unit detachably couples the side jig with respect to the rotation index by using a handling robot. 
     
     
         6 - 22 . (canceled)