Application of ODF MillBreakdownSizing

Welding

Cutting

Experiment results
Excellent forming with wide range of common use even for the challenging materials.
No.

Size

Materials

1

φ45.0 × 0.4t

Cu alloy(C1220R-1/2H)2

φ45.0 × 3.2t

Carbon steel(SPHC)

3

φ45.0 × 4.5t

Carbon steel(SPHC)

4

φ63.5 × 0.6t

Stainless steel(SUS304)5

φ63.5 × 0.6t

Stainless steel(SUS430LX)

6

φ63.5 × 1.0t

Mg alloy7

φ63.5 × 1.5t

Carbon steel(SPCC)

8

φ63.5 × 1.6t

Al alloy(5052R-H32)

9

φ63.5 × 3.2t

Carbon steel(SPHC)

10

φ114.3 × 0.5t

Stainless steel(SUS304-2B)

11

φ114.3 × 0.7t

Stainless steel(SUS304-2B)

12

φ114.3 × 3.0t

Al alloy13

φ114.3 × 4.0t

Al alloy14

Φ63.5 × 1.0t

Ti (TP270)● Small D/t products（φ45×4.5t , D/t=10）

Features of new forming technology

Orbital Die Forming●Extra large D/t products（φ114.3×0.5t , D/t=228.6）●Dry forming for various materials

AI-Alloy

SUS304

SUS430LX

Ti(TP270)

Ti(TP270)

Cu-Alloy

NAKATA MFG. CO., LTD.
3-7-6 Tagawa, Yodogawa-ku, Osaka, 532-0027, Japan
Tel : +81-6-6303-1900 Fax : +81-6-6303-1905
E-mail: sales@nakata-mfg.co.jp
Website: http://www.nakata-mfg.com
ISO9001:2008 Certification2013.07.500

Features of new forming technology

The characterisitcs of ODF method

High workability

Orbital Die Forming

In the initial forming stage, the tools can be commonly used to produce various products with diﬀerent
diameters, thicknesses and materials.

!
fotidmiolehte
Break thmgnimrofllor

Stable forming and high productivity

By using ODF method in the initial forming stage, the strip edge along the whole length is constrained tightly so thatthe twisting phenomenon can be completely suppressed.
By adopting ODF method in the welding bench, the strip can be constrained over a longer distance and the twoedges can be kept squeezed together within this long region., which provide us an opportunity to improve welding
speed further than usual roll forming.

Excellent surface quality

Little slippage between tools and strip surface.

Low work hardening

ODF makes use of multiple die blocks moving in the circumferential direction on an endless track, which
are connected together to provide a tool surface with a very large curvature radius and work just like a

Nearly 2-dimensional deformation similar to press forming.
By making use of the ODF method in the initial forming stage, the strip can be bent continuously from the ﬂat section
to an open round one without any interuption. The elastic recovery which occurs between forming stands of roll
froming can be entirely eliminated.

huge roll. The new forming method eliminates the slippage problem between tool surfaces and metal
strip and can cover a wide product range from large diameter pipe with excessive thin thickness to small
diamter pipe with extra heavy gauge. This ODF method is applicable to each forming stage in the pipe

The constitution of ODF mill

manufacturing.

The development of innovative forming method ODF (Orbital Die Forming)
Finpass section

Using forming rolls with huge diameters can get

Contact area

Concept

Forming rolls with huge diameters are used

Breakdown forming section

PipeODF Mill(No tool change)● Nearly two dimensional forming in section similar to press

forming method● Large contact area with materials ⇒Lower contact stress withRVS

less speed difference● The huge forming rolls for ideal deformation state is reallyEBimpossible to make.

Only the forming pass of contact zone isnecessary to achieve equivalent forming
results with huge rolls.

Forming region
Return region

Virtual huge forming rollDies

A multiplicity of die blocks is used in place of desirable huge rolls.
In the eﬀective forming area, the dies are seamlessly connected together to provide a continuous tool surface
equivalent to a huge roll's , whereas in the other portion of the endless track, the dies are turned as soon as
quickly along the nearest path..

Innovative technology