The EM 4RL PBM Series 4 Roll Pyramid Type Double Pre-pinch Plate Rolling are designed with double side pre pinching arrangement. The unique design permits the pre-pinching of job by both Side rolls; hence the job is completed in Simple operation.
To roll a given diameter on a four-roll is extremely simple. You introduce plate into the roll touching it off to the opposing Side roll for quick and accurate squaring of plate. You then raise lower central pinch roll and the plate is locked into position with no possibility of slipping. After this you back plate up to near tangent point of central rolls, then raise the left or right-side roll to the correct position to achieve your diameter and begin rolling. When the back edge gets close, simply release the left Side roll and bring up the right-side roll until it touches the plate and finish the pipe in one pass.
Standard Features:
4 Roll PYRAMID type design with double pre -pinching arrangement
High rolling Precision, no obvious residual straight seam, no need to rolling again
High rolling roundness consistency
It is high efficiency equipment for batch Rolling round multi section arc, Square, Conical and Special Shaped workpiece
Top roll is fixed, bottom roll moves up & down and Side Rolls Move Inclined
Side & Bottom rolls up-down through hydraulic cylinders
Top Roll is power driven by planetary gear box
Bending rolls are made of alloy steel
Dropper end operation by hydraulic cylinders
Overload protection
Low role, smooth operation and less power consumption due to hydraulic system operates at lower pressure in smaller thickness
Built - in - cone bending attachment
International quality Hydraulic & Electrical Components
• The Capacities are based on normal steel with yield point 260 N/mm². (2600 Kg/Cm²)
• Remaining Straight end after pre-bending 1.5 - 2 x plate thickness, depending on plate thickness
• The minimum bending diameter is 2 x Top roll diameter, depending on plate thickness.
• Maximum cone bending thickness capacity is 70% of pre-bending thickness, width is 2/3 x bending length
• Machines not mentioned above are available on request & demand
• Overall Dimension for basic machine (with oil tank) without optional equipment
• All data subjected to change without prior notice
NOTE : NC / CNC can program each workpiece, and manually adjust the diameter deviation caused by the difference of material properties.
