Welding Column And Booms, Welding Rotators, Welding Positioners, Welding Accessories, Seam Trackers, Seam Tracking Systems, Flux Recovery Systems, Special Purpose Machines, SPM, Turn Over Fixtures, Pipe Id Clading Station, Hydraulic Fit Up Rotator, Welding Trolleys, Generator Rotating Equipments, Motorized Material Transfer Wagon, Motorized Material Transfer Trolleys, Engineering Fabrication, Manufacturer, Supplier, Exporter, Pune, Maharashtra, India

Welding Rotators

We manufacture high quality rotators which are being used with various processes such as SAW/ TIG/ MIG/ ARC/ etc., capacities upto 2000 Tons. Steel rollers or polyurathene lined rollers are provided as per application. For higher capacity rotators forged rollers are provided.

• Our Standard Rotators consists of drive and idler unit. The frame and roller brackets are fabricated with
   heavy  sections, relieved and precision machined.
• Overload disc to protect polyurethane roller.
• Steplessely variable surface speed from 75 to 1500 mm/min.or higher and controlled through AC Variable    frequency drives. For precision movement encoder feedbacks are provided on case basis.
• Forward/ reserve rotation and emergency stop facility on panel.
• Operator pendant with forward/ reverse inch or run speed variation and stop functions.

Welding of Pipes, API pipes, Boilers, Heat Exchangers, Pressure Vessels, Mounted Vessels, LPG ullets, Barrels, Tanks etc.

• An indispensable tool for shell fabrication shops.
• Attains exceptional quality circumferential joints on shells.
• Increased production with reduced labour skill.
• Leads to minimum Shell/ Job handling.
• lesser usage of crane reduces idle time.
• Improves plant efficiency.
• Welding automation.

SPECIFICATIONS FOR SELF CENTERING ROTATOR
MODEL	SCR 5	SCR 10	SCR 20	SCR 30	SCR 40	SCR 50	SCR 80	SCR 100	SCR 120	SCR 150	SCR 200	SCR 300	SCR 500
CAPACITY- DRIVE & IDLER(TONS)	5 TONS	10 TONS	20 TONS	30 TONS	40 TONS	50 TONS	80 TONS	100 TONS	125 TONS	150 TONS	200 TONS	300 TONS	500 TONS
SPEED RANGE (mm/min)	150-1250	150-1250	150-1250	150-1250	150-1250	150-1250	150-1250	150-1250	150-1250	150-1250	150-1250	150-1250	150-1250
VESSEL(min-max) (mm)	400-4000	400-4000	400-4500	500-5000	500-5000	500-5000	600-6000	600-6500	800-6500	900-7000	900-7000	1000-7500	1200-8500
ROLLER DIAMETER (mm)	250	250	300	400	400	400	500	500	500	600 (Forged)	600 (Forged)	600 (Forged)	700 (Forged)
ROLLER WIDTH (mm)	75	100	125	150	150	200	200	200	200	250	250	300	300

Construction of machine is similar to that of conventional type Rotators. However, Housing Brackets are supported directly on the machine bed and are attached to the bed only with an L.H./ R.H. lead Screw andnuts. When the leadScrew is rotated with the ratchet handle, the Roller Brackets move simultaneously towards each other or away from each other.

In this series there will be twin drive arrangement. This type of design provides simultaneous and step less adjustment of the Roller housings, and keep the job axis atways at the same position irrespective of diameter setting.

Self Aligning Rotators automatically adjust the Roller Housings to accept any job diameters within specified diameter range. This type of machines are generally used to cope with the change in shell diameter, job to job. The roller housings of this type of machine are hinged to the beds and open automatically when larger diameter job is introduced. In this type of rotator. each roller bracket assembly has two separate roller assemblies,and thus supports the job on wider area.The final drive is given to both the 2-sets of rollers of the Drive Unit, provide better traction to the job. However,in this case a declutching arrangement is provided to the top rollers,in order to protect the gear boxes, as when the job hits the top rollers first while loading, there is a tendency of rotating the top rollers where as it is locked by the gear boxes.

During C-seam welding of shell sections on rotators,axial movement of shell or shell drifting invariably takes place.This drifting cannot be avoided. Reasons for this drifting could be geometrical inaccuracies of individual shells.inaccuracies of drive unit and idler unit alignment,etc. Even if the drive unit and idler units are aligned witheach otherinitially, duringshell loading,the algnment tends to get disturbed. In lighter shells. this drifting can be stopped by positive stoppers. However in heavier shells. due to axial drifting,tremendous pressure will get generated and this pressure will come on the positive stopper, if provided, and will break it. Ideal solution is to prevent this happening, to avoid creating such situation. This is achieved through anti-drifting arrangement.

In this case also, drifting will take place which cannot be avoided. But the movement will be restricted within a band of "+ 1- 5 mm". Seam will keep floating forward and backward within this range.