The proposed Slitting line will function as a constant speed type. In the beginning, the coil is loaded on the coil car by E.O.T. crane and brought to the uncoiler by operating the coil car. Coil car centralizes the coil with the uncoiler mandrel and the coil is mounted on the uncoiler. Mandrel is expanded. Snubber roll rotates the coil. Peeler breaks the straps and brings the pre end upto Pinch roll. The Pinch roll drives the coil end upto the slitter. Then its drive is disconnected. Slitter moves the slitted strips further. Slitted strips are threaded through loop table and drag tensioner into the recoiler drum. Recoiler winds one turn on loose coil. Then drag tensioner and loop are put into operation. Slitter and recoiler run simultaneously in synchronization. As the coil build up, the recoiler rpm correspondingly goes down to keep desired constant line speed. This process goes on until the end of coil on uncoiler. The slitted coil is pushed on the exit coil car trolley through a pusher plate operated by hydraulic cylinder. The side slitted scrap is wound on the scrap winder units provided on both sides of the slitter.
Tube Mill As Per API Line
Tube mill mainly consists of strip preparation, pipe forming, welding, cooling, sizing straightening, pipe cut-off unit and pipe take off unit. A forming motor of and a sizing motor and power transmission is done by worm gear boxes drives the whole machine.
The strip first requires leveling and straightening which is done by passing the strip through strip leveler, pinch rolls and guide rolls. After this, the strip is passed through various forming rolls where the strips are converted into open seam pipe. Then it reaches the welding unit where the edges of the open seam tube is heated by hf induction generator (or any other welding equipment). Immediately after heating, the edges of the pipe are forged (fused) in the squeezing unit and it takes the shape of complete pipe.
After welding, the welding portion is scrapped by bead scrapping unit then the tube is cooled in cooling jacket. For making it exact round the pipe is passed through sizing unit and then through turks head for straightening. After this the tube is cut into required length by a moving cutting machine and pushed to take off table.
Burr Free Cutting Car
Burr Cutting Car is used to cut the end of the pipe without having burr. It is the first time in india a highly electronics & Mechanical automation is used in this product the detail as under -:
Microprocessor based Servo Control System Consisting of three phase AC Controller with AC Servo with Brake holding.
AC Servo Drive
Connecting Cable between Servo Motor & Controller
Programming Software tool “Easy Rider” with connecting lead.
MMI for Operator Control
Operated with Encoder and Encoder lead.
Pneumatic cylinder with magnetic censors non return valve, read switches, automatic brass vice etc…
Drake chain for cables
Safety interlocks
Click & See Burr Free Video Clip
AC Servo motor with Gear Box
PLC Control(Siemens) with touch screen Rack and pinion Germany make With Servo drive panel, control desk.
Solid State Welder
Solid state high frequency welding pipe equipment's
Solid state high frequency welding pipe equipment uses the common structure of frequency conversion such as AC-DC-AC. Three phase 380V power supply is sent to step down transformer before it passes through switch cabinet. The AC power supply is around 200V which has been dropped voltage to sent into the rectifier in rectifier cabinet, Rectifier use thress phase thyristor fully controlled bridge rectifier, through control thyristor breakover time delay angle a to achieve the purpose for adjustment output power size.
The rectified DC voltage is sent to the high frequency invertor before pass through the filter link. high frequency invertor to inverter producing single phase high frequency and being send to resonance circuit. Via the matching of load and the adjusting mechanism output high frequency energy to complete steel pipe welding. The comparison with vacuum tube high frequeny, the main diffrence between vaccume tube welder is it's efficiency SSW efficiency is 85% as campair to vaccum tube welder which is 65% and SSW no oscillator valve i s used solid state welder save electricity consumption because off it's 25% efficiency saving,
welding pipe power supply Vacuum tube high frequency welding pipe equipment has accumulated operation design experience for a long-term, The equipment quality and the operation stability have been accepted by the general welding pipe enterprises. Along with the promoted application of solid state welded pipe equipment, its strong advantage for highly effective energy conservation opened a new path for the intense welded pipe profession competition. The third generation solid state high frequency power supply has many fine performance, there is no doubt it has the competitive advantage compares our company earlier period the second generation solid state high frequency power supply.
HF Vaccum Tube Welder
High frequency welding pipe equipment uses the common structure of frequency conversion such as AC-AC and AC-DC. Three phase 380V-420V power supply is sent to step up transformer before it passes through switch cabinet.
High Voltage Rectifier :
It Rectifies The High Voltage Ac Power From The H.T.
Transformer To The Dc Power Required For The Oscillator.
3 Phase Full Wave Rectification. Silicon Diode Mounted On Aluminium Heat Sinks Cooled By A Water Air Heat Exchanger.
Dc Over Current Relay Safety Device.
High Frequency Oscillator Unit :
It Converts The High Voltage Dc Power From The
Rectifier Into The High Frequency Energy And Supplies It To The Welding Point Through The Hf Output Transformer And The Output Coil (Inductor). It Is Composed Of :
Pressurised All Around Access, Aluminium Cabinet Dust etc.
Seam Annealer
The main supply Transformer is specified in a way that the supply reactance works as a limiting factor of peak asymmetric fault current; and non-compliance with this specification can be destructive for Rectifier semi-conductor devices. Over current protection is provided. Line current measuring CT’s are constantly measuring the line input current and this information is fed to trip section of control card. Where a reference is set. The moment actual current exceeds the reference current, electronics on trip section of control card shuts off the Rectifier driver PCB via sequence section of control card. This is an extremely fast protection. Over frequency protection is provided. A feedback from step-down Transformer, connected to MF AC output is fed to crowbar memory section of control card, which constantly monitors the width of AC output cycles. As soon as the width of any AC output cycle goes below a reference width (as set in Crowbar section through a mono-stable) the electronics on this section operates to shut-off rectifier.
Hydrotesting
The pipes are aligned at the fixed testing head:
The feeding beams receive one pipe and move into in the axis of the tester. The lifting mechanism provides the pipe axial plane with the tester. At its upper part, the pipe is centered with supports adjusted at the level requested by the pipe diameter, without pressing it, in order to allow for its expanding during testing.
The pipe is also centered on the testing heads; it is pressed on the front sealings, by getting closer the fixed head and the mobile head on the carriage. The sleeves are profiled according to the pipe ends profiles (deburred preceding).
The panel assembly contains cabinets for PLC and for AC drives. The cabinets will also contain interfacing i/o modules.
The cabinets will be made of metal structures of high quality, painted in electrostatic field.
AC/DC/Servo Drives & Panels
Servo Panel
Main Distribution Panel
AC/DC Panel
AC and DC Drive PanelDrive panels are used to save the power in the industries where there is huge power requirement like Sugar mills, Steel plants, Fefineries, thermal power plants etc. The Drives are available in AC as well as DC. These drives are PLC based and saves electricity upto 30%, which in such large plants matters a lot.
Drive panels are manufactured for small machineries also such as agricultural machines and synchronous machines.
