Suitable work piece web thickness a:     6-25 mm

Suitable work piece flange width b:      200-800mm

Suitable work piece flange thickness s:  6-32 mm

Suitable work piece length:            4000-15000mm

Assembly welding and straightening speed:   0.2-2m/min

Welding manner:  Flat fillet weld at two sides, welding joints height ≤8mm

Input conveyor:                              2600mm/section, 3sections conveyorsone is drive conveyor

Output conveyor:                           10m (Inc. Elevating type conveyor)

PHJ15 H Beam Integrated Welding Line, H Beam Welding

Machine power:                             mainframe: about 20kW, SAW welder: 80kw×2sets

2. Structure character

PHJ15 H-beam Assembly-Welding-Straightening Integrating machine is an advanced and high efficiency equipment for welding H-beam production, integrating precision assembly, stable SAW welding, flange deformation straightening and welding of H-beam together. It has merits of compact structure, small area occupying, high automatic and high productivity. It mainly consists of assembly unitwelding unitstraightening unitconveyorhydraulic system and electrical control system, etc.

2.1 Assembly unit:

There is 1 each centering positioning clamp unit of web and flange set, adopts mechanical interlocked unit realizing synchronization motion, one side is located by lead-screw while the other side clamp by hydraulic pressure, lead-screw position is measured by rotation encoder and digital display shows the data. The clamping for wed and flange is powered by hydraulic cylinder, not only with powerful strength, but also adding flexible of web and flange clamping to accommodate flange width varies caused by cutting or other reasons and web thickness varies due to web prolong welding seam by means of automatic retraction to avoid work piece block.  

There are 3 sets web and flange initial centering pulling rod at the end of input conveyor, when hoist the flange and web to main machine, it can make initial automatic centering for the central line of machine and support the web, avoiding swing or overturn of web and increasing the safety rate of operation.

The swing block rack at the end of H-beam assembly input can ensure the end alignment of web and flange when assembling.

2.2 Welding unit

The main machine of Assembly-Welding-Straightening Integrating Machine adopts flat welding to weld I-beam and H-beam, each one set of SAW power at both sides. It adopts seam mechanical tracing, tracing welding of both seams at both sides at same time.

Welding system collected by U.S.A LINCOLN DC-1000 power source and NA-3S control box and wire feeder, which adopts twin arc welding technology to achieve high welding efficiency and reliable quality.

There are 2 sets welding flux automatic feeding and recovering unit, which can improve the welding automatization level.

Welding speed, that means work piece transportation speed adjusting by variable frequency way, choose the reasonable weld speed according to welding technology.

2.3 Straightening unit:

There will be distortion of H-beam flange for heat radiation, continuous roller press straightening after seam cooling and solidification. The straightening specification of work piece that is straightening capacity refer to Fig1 and the table below ( work piece material is Q235, tensile strengthσb=400Mpa, the other material can adjust suitable according to material tensile strength. For example, when tensile strength isσb=600MPa, s=400/600=0.667, the flange width, flange thickness will be 0.667 times of figure in the following table):

The lower straightening roller drives work piece forward when the upper roller straighten work piece by pressing downward. The straighten capacity can be adjusted accordingly to flange thickness and deformation condition to make continuous roller press straighten