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Automatic Single Shell Welding Machine

Automatic Single shell poles welding, starting from bended shells.

OMM provide wide and flexible solutions by its new Single Shell Welding Machine with continuous welding, high welding quality, high welding penetration, conical round & polygonal welded poles, straightened poles, that make this machine suitable for poles' production plant with a wide range of poles' production typology.

OMM’s Single Shell Welding Machine can easily be operated and carried thanks to its user friendly interface. It's produced with the latest production technologies able to guarantee the best results in term of poles welding.

It is used for steel poles production, it represents the solution for companies that want to produce poles (conical round & polygonal poles) with very wide range of poles typology and a very high quality, reduced poles handling time and high production rate.

OMM’s Single Shell Welding Machine process independently conical round & polygonal pole starting from the top diameter or from the bottom diameter, up to 650 mm diameter. This machine is suitable for being inserted in an automatic line, downstream of the presses.

This machine allows, starting from a bended trapezium, to weld the joint applying the correct force from the side and from the top in order to close the joint without any shape deformation. In order to do so, the machine, which is fully automatic, checks the value of the force applied and changes it according to the mechanical resistance (diameter and thickness). By using this machine it is possible to manage the position and pressure control of 5 axes in total, driven by hydraulic cylinders.

OMM’s Single Shell Welding Machine simultaneously with the welding phase, straights the poles without using fire, guaranteeing a maximum bending on the total length not more that 2 mm (i.e. L = 16 m, Thickness = 5 mm)

The whole process is managed by only one operator for parameters setting (poles length, top and bottom diameter, thickness) and supervisor. 

Making a good pole, straight and well welded, it’s the main feature in order to don't waste time and money on the repairing station.


Penetration 60% Penetration 70%-80%
Welding speed (m/min) Welding speed (m/min)
3 2.0 1.7
4 1.8 1.5
5 1.6 1.3
6 1.4 1.0
8 1 0.7
10 0.8 0.4


Penetration 60% Penetration 80%
  Welding speed (m/min)
3 - 2.2
4 - 2
5 - 1.8
6 - 1.6
8 - 1.2
10 - 1

- Pole minimum diameter 60 mm
- Pole maximum diameter 650 mm
- Pole length up to 16 m
- Wall thickness up to 10 mm
- Any taper ratio of poles
- Material to process: ST 37- ST 52 (without oxide and lubricant), Steel Sheet Leveled, Skin passed and on-size trimmed (Yield strength 35 Kg/mm2 / Tensile strength 50 Kg/mm2)
- Automatic shell convey without any special tool
- System for the pole twisting recover (pole guide)
- Welding Top-Bottom reverse: our machines allows to work starting indifferently from the head or the pole base
- Conical round & polygonal poles welding
- MIG/MAG or SAW welding technology
- Lateral variable pressure respecting to the pole resistance (diameter and thickness)
- Automatic poles straightening during the welding process, without fire (in agreement with the European law 626/94)
- Minimal poles deformation during the welding phase
- Pull carriage for pole and advancement at constant speed making a perfect welding (without any interruption)
- Real time data monitoring system & tele service through internet connection
- Pole handling time maximum 30 s
- Production rate 10 poles / hour (i.e. L = 9 m, Thickness = 3 mm)
- Only one operator for line management


This machine as all our machines/systems has been designed and manufactured respecting all the norms, in term of safety and respecting the environment ( noise, fumes aspiration, energy recovery back), given by the European Community:

- Conforms to the disposition of the machine directive (2006/42/CE) of 15 January 2016, and following amendments (directive 95/16/CE);
- Conforms to the disposition of the following other directives: directive low voltage (2014/35/UE) of 29 March 2014 and electromagnetic compatibility (2014/30/UE) of 26 February 2014.
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