H beam Vertical Assembly-Welding-Straightening Machine
H beam vertical multi-functions Assembling-Welding-Straightening machine is a high efficient equipment for the production of H-beam. The machine can simultaneously complete the precise assembly、fillet submerged arc welding and flange plate welding deformation correction on the same machine. This type machine is suitable for the production of H-beams with a leg of fillet weld below 12mm.
PHJ series 3 in1 integrated machine occupies a small area. It is a high-tech,economical and practical H beam productions equipment. Compared to normal single machine production line,the lifting and overturning steps between the assembly、welding and straightening are avoided, and the production efficiency is greatly improved.
1、Assembly details of the machine
1.1: Input / Output conveying roller tables
The input conveying roller tables are consists of two driven roller tables and one passive roller table.The driven roller table is driven by AC motor/reducer with clutch and sprocket/chain.
The output conveying roller tables are consists of two driven roller tables with hydraulic elevating function and one passive roller table.The driven roller table is driven by AC motor/reducer with clutch and sprocket/chain.The table lifted by hydraulic.
The passive roller table is placed at both ends of the line. It has no power drive and mainly supports the H-beam. According to the length of the H-beam, we can appropriately increase the length of the passive roller table.
1.2: Flange & web plates pre-clamped system
Pre-clamping devices is fixed at the input side of the main machine. The web plate and flange plate are clamped separately by two hydraulic cylinders. According to the principle that two points determine a straight line, two clamping units are generally used, and the two clamping units are connected together by rods.
1.3: Flange plate & web plate high-precision centering
In the initial state, the ends of the flange and web are not in the same plane. The steel plate end position alignment using a hydraulic cylinder drive the metal block overturn around the hinge shaft. The strong hing shaft avoids the cylinder directly bearing the impact force caused by the movement of the flange and web plate.
Flange/Web plate centering positioning clamp system is driven by a hydraulic motor, which greatly improves the positioning accuracy. The left and right sides move synchronously by a long shaft. The clamping wheels are installed on the sliding table, and the table can slide on the linear guide by ball screw. Compared with ordinary screw and sliding sleeve, ball screw and linear guide have higher transmission and positioning accuracy.The swing phenomenon caused by the wear of the sleeve-type sliding is avoided.
Upper press roller is fixed on the slider. The up and down movement of the slider is drove by the hydraulic cylinder. Bottom rotate roller drive by AC motor.The rotating speed is changed by VFD.
The material of roller 40Cr steel, its surface is quenched and tempered. The roller and rail surface have high hardness HRC 50-55.
2、H beam welding system
H beam welding system is composed of submerged arc welding power、welding gun guiding 、welding current conductive device and flux delivery system.
The fillet welding seam of the web and the flange is vertical, so the height of the welding leg has higher requirements on the position of the welding torch and the welding power. Our welding gun position adjustment mechanism is composed of cross-slider、welding gun quick pressing system. The welding gun quick pressing is realized by two hydraulic cylinders. After the oil cylinder is lowered, the guide wheels close to the web and flange plate to ensure that the welding torch is aligned with the welding root. The front and rear positions of the welding gun can ensure that the welding seam is in the correct position.
Welding current is conducted to the earth through four conductive brushes. The conductive brushes are respectively fixed on the sides of the main drive roller. carbon brushes and copper belt have good electrical conductivity.
We often use direct current welding power DC-1000 (Lincoln Brand ) or ZX5-1000 (Zhouxiang brand). Direct current reverse polarity to obtain greater penetration and higher welding productivity. Silicon controlled rectifier (also named thyristor) welding power has good dynamic characteristics, arc stability, anti-interference.
Two sets 50Kg flux recycling and delivery machine was placed on the upper back of the machine.The negative pressure air pump is driven by an 3Kw AC motor with strong suction power. During the recovery process, the dust bag filters the dust, and the fine dust and flux are automatically separated. The reusable flux enters the small bucket through the large barrel.During welding, the flux flows out from the welding gun and spreads flat on the welding pool.
3、H beam straightening system
Flange plate straightening structure is installed at the output of the machine.The tapered correction wheels press on the flange plate can be realized by two hydraulic cylinders. Compared with mechanical correction, hydraulic correction has the advantages of large correction force and fast working speed. The encoders can accurately measure the pressing distance of the straightening wheel
4、 Hydraulic system
The hydraulic system is made strictly in accordance with national standard, and the layout is very reasonable meanwhile giving sufficient consideration of high-efficiency, energy-saving, and heat-saving. The system is independent, and we use professional sealant for connecting joints which can prevent the machine from leakage, with easy maintenance.
The layout of pipelines is simple with easy maintenance. In order to keep the oil clean, there is oil filter installed on the oil pump intake, the pressure oil from oil pump go through the pressure-adjusting system first and set the pressure , then going through the valve block, at last it reaches to oil cylinder through directional valve (reversing valve).
Hydraulic system use pressure control loop, speed control loop and direction control loop. The system can offer two kinds of pressure, hydraulic valve is Sandwich plate valve, which can adjust pressure,speed and direction.
Pressure control loop adjusts system’s working pressure by two overflow valves ,overflow valve can also act as pressure limit protection.There is pressure relay inside hydraulic system, when pressure gets too big beyond rated , it can stop pressing to protect the machine .
Hydraulic system is composed of motor, high pressure oil pipe ,gear pump group, various hydraulic valve ,oil box and other accessories .
PHJ assembly-welding-straightening machine hydraulic functions include: preliminary positioning of flange and web plate, precise positioning of flange and web plate, alignment of the ends of the flange and web plates, upper press wheels elevating, left and right welding torch positioning, left and right correcting wheel press.
5、 Electrical control
Electric control system is composed of electric cabinet and control box. Control box was fixed on the machine with two welding power control boxes.
The electrical components mainly use the AC frequency converter and AC contactor of France Schneider, the Omoron encoder of Japan,Air switches of ABB of Sweden, etc. The pressing distance of the left/right straightener wheels can be calculated and displayed on the digital display table by a counter of encoder.The moving speed of the H beam can be adjusted by the AC frequency converter.
Power on/off , Start/stop knob of pump station,pump station indicator lamp is installed on the panel of electrical cabinet and control box. Two emergency stop knobs were installed on the main electrical cabinet and control box.
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