U Rib Outside welding machine

1.Introduction for U Rib Outside welding machine：

1.1Overview

The U-rib portal welding machine is a welding equipment developed based on the welding process of filling angle welds between the U-ribs and the bottom plates on the U-rib plate unit of a steel bridge. This machine is mainly used for the special purpose of simultaneously performing gas-protected sub-boat-shaped welding between multiple U-ribs and the bottom plate. The machine has a compact structure and is easy to operate.

This machine adopts a bilateral drive structure form, mainly consisting of a driving walking mechanism, a frame body, a lifting crossbeam, 6 sets of cross-shifting mechanisms for the columns, 6 sets of column lifting mechanisms, a welding swing arm, 6 sets of weld seam tracking systems, an automatic welding system, an air control system, and an electrical control system.

This machine is driven to move smoothly as a whole by the servo motor - reducer - roller system. The lifting crossbeam is equipped with 6 welding lifting columns, and each lifting column is equipped with a weld seam tracking device. The weld seam tracking device operates along the weld seam under the action of the left-right and up-down tracking guide plates. The lifting crossbeam can be tilted from 0 to ±38° like the swing-type welding anti-deformation jig. The lifting mechanism and the horizontal movement mechanism can be operated easily, resulting in high welding efficiency. The control system uses PLC automatic control, and the current and voltage of the gas-protected welding machine are digitally centralized controlled. The operation is simple.

1.2Welding workpiece requirement

The width of the base plate is 4.5 meters, the maximum length of the base plate is 16 meters, the thickness of the base plate is 12 - 40 mm, the thickness of the U-rib plates is 12 mm, the angle between the U-rib plates and the base plate is 1060 degrees, the bevel angle is 460 degrees, and the fillet is 0.5 - 1 mm. Each base plate has 6 U-rib plates, and the center spacing of the U-rib plates is 600 - 800 mm. The material of the workpiece is Q345.

1.3Welding process requirements

The U-shaped rib welding adopts an open groove incomplete penetration ship-shaped weld seam. It is welded using gas shielded welding, with a welding wire of φ1.4 core type, and 250KG of pre-packaged welding wire.

2.Technical parameter for U Rib Outside welding machine:

2.1Technical performance specifications

2.2Welding system configurations：

3.Characters for U Rib Outside welding machine:

3.1Characteristics

1) Multiple U-shaped ribs are welded in a ship-like pattern simultaneously.

2) Six gas welding machines are centrally controlled, and each machine has a fine-tuning function.

3) CO2 gas is centrally supplied and uniformly managed.

4) This equipment uses single arc and single wire gas welding; the weld seam is automatically tracked.

5) The gas welding gun can be manually adjusted up and down, and left and right.

3.2Scope range

1) Main support frame; including walking body, support frame body, lifting crossbeam, lifting electric hoist, etc.

2) Guide rail: 48 meters x 2, 43 kg/m, adjustment pad (excluding welded H-shaped steel sinking beam)

3) Welding arm: 6 sets of weld seam tracking bodies, linear guide rails, rotating mechanism, locking mechanism

4) Pneumatic control system: including onboard centralized air tank, supply main pipe and branch pipe, oil-water separator triplex, solenoid valve components, cylinders

5) Energy transmission: including drag chain, cable wire, control wire

6) Welding system: 6 sets of XD600S welding power supplies, 6 wire feeders, 6 welding guns

7) Welding smoke recovery device: 1 welding smoke recovery machine, filter cylinder, absorption pipeline, etc.

8) Electrical control system: including control box, sub-control box.

3.2By User production (including trial use)