Steel plate material Q345-B
The cover and web of the main beam should get surface rust removal by roller-way conveyor blasting machine before welding his blasting machine can perform blanking, sandblasting, painting and drying, after that, they get to Sa2 2 level.
Prepared deflection upwards for feeding of main beam web complies with principles of quadric parabolic, use Cad to compute the corresponding high point and CNC plasma cutting machine to conduct cutting and blanking.
The welding of the main beam should be performed on the working platform. In order to avoid distortion of the main beam, our company adopts U-shaped main beam assembly machine with hydraulic forming which has won national patent ensuring that vertical deflection degree between the joint edge of stiffened and web plate and upper cover should not more than H/200 and also efficiently reduce the partial wave of web plate.
Butt welds of the upper and lower cover of the main beam adopt submerged arc welding, the welding of stiffened and website with cover adopts CO, gas protection welding. The welding of four vertical angles of the main beam employs boat-shaped submerged arc welding which refers to set box-type main beam as a boat-shaped position with 45 pads and then perform submerged arc welding trolley.
It employs a motor hoisting mechanism and reducer imported from Germany. The integrated and compact design of the hoisting motor, reducer, reel and limit switch saves space for the user. Modular design increases the reliability of the mechanism meanwhile reduces the time and cost of maintaining.
It has more and faster hoist speed and various pulley ratios which can be selected. The standard traveling mechanism of the trolley is controlled by the converter, with the speed of 20m/min which makes a little swing and accurate position if hoisting items while the trolley traveling as well as lifts precision and valuable items reliably.
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