Long Part Flowforming

Product catalog summary

Machine Overview: The RFFM Series, including models RFFM 645 and RFFM 670, are advanced roller flowforming machines designed for efficient production of tubular hollow workpieces. These machines feature a revolutionary 'Free' Flowforming technology, patented by REPKON, which enhances material flow and efficiency.

Specifications:

Number of Rolls: Both models can operate with 6 or 3 rollers, adaptable to workpiece size.
Workpiece Diameter: RFFM 645 handles diameters from 220 mm to 450 mm, while RFFM 670 ranges from 260 mm to 700 mm.
Workpiece Length: Maximum forward flow length is 3300 mm for RFFM 645 and 3000 mm for RFFM 670, with reverse flow up to 6000 mm for both.

Drive and Force:

Headstock: Spindle drive power is 354 kW with speeds of 830 rpm (RFFM 645) and 730 rpm (RFFM 670).
Axial Drive: Power is 144 kW with a force of 400 kN, and feed rates from 0-4 m/min (forming) to 0-12 m/min (rapid).
Radial Drive: Servo hydraulic force is 400 kN, with stroke variations between models.

Additional Features:

Ejector: Stroke of 1250 mm and force of 210 kN.
Tailstock: Stroke of 4300 mm, speed of 30 m/min, and force of 150 kN.
Hydraulic System: Drive power of 90 kW, pressure up to 200 Bar, and tank capacity of 1500 liters.
Coolant System: Flow rate of 600 liters/minute with a tank capacity of 4000 liters.

Innovations: The RFFM Series introduces a friction-free flowforming method, significantly improving efficiency and material handling. The machines can be configured with varying numbers of rollers to meet specific production needs.

Applications: These machines are designed to meet the demands of major production plants across Europe, Asia, and the Americas, offering flexibility and advanced capabilities for diverse manufacturing requirements.

Catalog excerpts

6 RO L L E R F LOWFORMING MAC H I N E R F F M S E R I ES Machine Designation RFFM 645 RFFM 670 Number of Rolls 6 (3) 6 (3) Workpiece Work-piece diameter min.(mm) 220 (40) 260 (50) Work-piece diameter max.(mm) 450 700 Work-piece length forward flow max.(mm)* 3300 3000 Work-piece length reverse flow max.(mm) 6000 6000 Headstock Headstock Spindle Drive Power kW 354 354 Spindle Speed (rpm) 830 730 Spindle Tool Mount DIN 55027 size 20 20 Axial Drive Axial Drive Power (kW) 144 144 Axial Force (kN) 400 400 Axial Forming Feed Rate (m/min) 0-4 0-4 Axial Rapid Feed Rate (m/min) 0-12 0-12 Axial Stroke (mm) 3400 3200 Radial Drive Servo Hydraulic Radial Roll Drive Force kN 400 400 Radial Roll Stroke (mm) 165/245 290/370 Radial Roll Forming Feed Rate (m/min) 0-1 0-1 Ejector Ejector Stroke (mm) 1250 1250 Ejector Force (kN) 210 210 Tailstock Tailstock Stroke (mm) 4300 4300 Tailstock Drive Speed (m/min) 30 30 Tailstock Force (kN) 150 150 Distance Between Spindle & Tailstock max. (mm) 8200 8000 Distance Between Spindle & Tailstock min. (mm) 750 750 Hydraulic System Hydraulic Drive Power (kW) 90 90 Hydraulic System Pressure max. (Bar) 200 200 Hydraulic Tank Capacity (l) 1500 1500 Coolant System Coolant flow litres/minute 600 600 Coolant Tank Capacity (l) 4000 4000 * Work-piece length can be up to 2000 mm using Free Flowforming method.

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The improved design not only boosts the efficiency of the machinery, it also enhances the forming method to an unprecedented degree. The increased number of rollers with new break-through friction-free Flowforming method (REPKON patented) has monumental advantages over conventional machines. This revolutionary "Free" Flowforming technology yields free flow of material. INTRODUCING THE NEXT GENERATION FLOWFORMER The six-roller RFFM series flowforming machine can be used as a three roller for small diameter work-pieces as depicted on the table. Alternatively, the fixed roller housing of the CNC...

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