Machines and complete plants

for the round bars

cold finishing

STRAIGHTENING FOR ROUND BARS

The constant collaboration in the construction of these machines together with “historical” manufacturing companies (Bronx, Kieserling), led us in our fifty years of experience in this market, to provide straightening with two hyperbolic rollers able to cover a range from 8 mm to 200 mm of diameter for both raw rolled bar, both for  finished peeled bars.

Our straightening machines are able to straighten the bars through the yielding of the outer fibres of the bar, which have accumulated tensions during the material production process.

 

Main features:

  •  The straightening process by only two rollers enable to obtain optimal straightening results and constant all over the entire length of the bar including the tips and the tails.
  • The welded monoblock structure ensure a constant force of straightening and low vibration, which allow the repeatability of all the operations of straightening, ensuring an excellent straightened product.
  • All the Landgraf straightening are equipped with a hydraulic safety device for the anti-standing of the bars.
  • With the machines is also provided a software that required input data of the yield strength of the material and the diameter of the bars, and based on these data, sets automatically the position of the upper roller, the angle of the rollers and the force to exert.

In particular we provide straightening for the raw material after the rolling process that ensures an output product with straightness 1 mm/m.
In particular we provide straightening for the raw material after the rolling process that ensures an output product with straightness 1 mm/m

Our straightening machines for round finished bars, after the peeling process, guarantee a output product with a straightness of 0.2 mm/m and a surface roughness Rz ≤ 2µm obtaining a product shiny and uniform.

Our philosophies of construction for these machines:

The goal we have set is to give to the customer fully automated systems, in which they may have:

  • Complete alignment of the entire line to the diameter bar set.
  • Linear motorized driving with position control.
  • Automatic control of the straightness in-line or out-line, and the recirculation of the first bars for the improvement of machine calibration
  • Automatic Exchange a linear rollers.
  • System of automatic polishing of rollers in the machine during normal production


This is essential if you have a wide range of diameters to work, with small batches for each order. Everything is designed to minimize the downtime in order to increase production.

Landgraf s.r.l.

Via Enzo Pagani, 116
20025 Legnano (MI)

Phone: + 39 0331 1528680

Telefax: + 39 0331 1528681

 info@landgraf.it

 

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