Page 3 - HF Engineers and Fabricators Ebrochure

HF ENGINEERS & FABRICATORS

MANUFACTURER, EXPORTER & TRADER

INTRODUCTION:
"HFEF Make Electro-Mechanical Pyramid Type Plate Rolling Machine is reputed Industries and
Fabricators because of its workmanship, design and performance. Pyramid Type Bending Rolls are most
suitable for production of cylindrical shells used for various purposes like Pipes, Storage Tanks,
Chimneys, Pressure vessels etc.

DESIGN:
Though the construction of the machine is strong, sturdy, rigid and heavy; special emphasis in design and
modern technique have both been combined to give the machine a sophisticated appearance along with
a low profile, which provides a low pass-line for ease of Plate Rolling and convenience of the operator and
also simultaneously maintaining accuracy.

CONSTRUCTION:
Heavy Duty Plate Rolling machines employ the conventional 3-roll Pyramid Principle. The bottom rolls
rotate in a fixed position but the top roll is adjustable for an up-and-down movement with the help of two
manually adjustable screws which in turn rotate in heavy Metals Nuts provided with thrust support. These
screws are easy to rotate since they are provided with a Ball Bearing Mechanism which is incorporated in
two Load-ending Gun Metal Bushes which in turn house the top roll.

DRIVE:
The bottom rolls are given drive through an electric motor and a worm reduction gear box of reputed
make. The drive is transmitted to the bottom rolls through a set of gears cut from forged steel, by Hobbing
Process and tempered for longevity and durability.

HOUSINGS:
The housings are of all steel fabricated construction, make from plates of suitable strength having good
welding Characteristics are fracture proof. The drive-side housing is provided with a fabricated screw type
counter-balancing system, which keeps the top roll horizontal and parallel to the bottom rolls for
facilitating easy removal of the rolled shell.

ROLLS:
Rolls are made of wear resistant forged premium steel EN8/EN9 material and to keep the deflections
during working to the minimum. They are generously dimension. Axial Grooves are provided throughout
the length of the bottom rolls for a better and firm grip, correct feeding and squaring the work piece in the
machine before the rolling operation. The top roll bushes side in a machined chamber of the all steel
fabricated load-resistant heavy duty housing.

BUSHES:
All the bushes are provided with a built-in storage for the lubricant. The Gun Metal bearing provided in the
bushes is incorporated with circumferential and axial grooves for even lubrication of the roll journals and
thus ensuring minimized friction and longer life of the Gun Metal Bearings. Pointer Indicators and scales
are provided at both ends for correct top roll adjustments and pressure. In production work this pointer
and scale are extremely useful to repeat a setting.

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