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247TailorSteel contact details

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The Netherlands

247TailorSteel B.V.
Markenweg 11
7051 HS Varsseveld
The Netherlands
+31 315 270 375
sales@247tailorsteel.com

Germany

247TailorSteel GmbH
Holzweide 1
28307 Bremen
Germany
+49 421 696 75 247
verkauf@247tailorsteel.com

Belgium

Fabrieksstraat 145
3900 Overpelt 
Belgium
+32 11 922 404
sales@247tailorsteel.com

Luxembourg

Maarten van den Dungen
+31 681 509 917
maarten.vandendungen@247tailorsteel.com

Cutting guidelines for tubes

Index

Versie 1.0 10/10/2017

General

Ducts (square and rectangular) must be drawn in the corners as follows: inside radius = 2x wall thickness and inside radius = 1x wall thickness. The value “2” is the average value of the size of the radiuses specified in the standard.

247TailorSteel cuts 2.5D. This means that the cutting edge of the ducts is perpendicular to the material (centre-orientation). In case of tubes, it is directed towards the centreline. Some examples are discussed later in this manual. The software of the 247TailorSteel converts the 3D-cutting edges into 2.5D-cutting edges.

Wall thickness options:

  • S235 (st.37): up to and including 8 mm
  • S355 (st.52): up to and including 6 mm
  • Stainless Steel: up to and including 5 mm

Dimension options:

  • Tube diameter: minimum Ø20.0 mm and maximum Ø219.1 mm.
  • Duct: minimum square 20x20 mm and maximum 200x200 mm.

Maximum weight of the product per metre: 32 kg.
Maximum length to be laser cut from one piece: 5,400 mm.

Tolerances

The tolerances on the cut contour, centring of the cut contour and on the total length amount to +/- 0.2 mm. The tolerance is strongly influenced by a number of factors, such as:

  • The form and dimension tolerance on the tube and duct
    These are described in the relevant standard sheets (for example EN10219). Deviations from the nominal tube/duct dimension have a direct influence on the centring of the cut contours.
  • The dimensions and rigidity of the tube and duct
    Small and narrow ducts are flexible and move a lot in the machine during laser cutting. This can cause deviations in the dimensions and cutting patterns.
  • Heat-input through contours
    When many contours are cut into a tube or contour, this gives a lot of heat-input and the tolerances can deviate. This also causes discoloration of the material.

Welding seam position

When loading the machine, the ducts are loaded randomly (sometimes a complete bundle). This makes it possible that the welding seam can be on different sides of the same product. This means that the welding seam can be on different sides of the same product:

We would like to receive a PDF-drawing on which the position of the welding seams is rendered per duct immediately after placing the order. You can send this PDF to tube@247tailorsteel.com.

Voorbeeld - tekening positie lasnaden

Example - The orange arrow represents the position of the weld seam


Splash on the inside of the tube/duct

The liquid material that forms during laser cutting can attach on the inside of the opposite side; this is also referred to as splash. The dimension of the splash depends on a number of factors:

  • Internal diameter of the tube/duct
    The larger the diameter, the smaller the splash.
  • Wall thickness of the tube/duct
    The larger the wall thickness, the bigger the splash.
  • Internal surface of the tube/duct
    A smooth - greasy tube/duct is less sensitive to the attachment of a splash than a rough - dry tube/duct.

Engraving

247TailorSteel only engraves functionally, for positioning or identification. Blind holes are automatically recognized as engraving. If desired, Sophia can convert a cutting contour into an engraving.


2.5D-laser cutting

247TailorSteel cuts 2.5D. This means that the cutting edge is perpendicular to the material (centre-orientation). The software of 247TailorSteel converts 3D-cutting edges into 2.5D cutting edges. This means that a product can be cut different to the drawing. See the examples below for an impression:

Voorbeeld - getekende afbeeldingVoorbeeld - getekende afbeelding

Example - drawn image

Voorbeeld - 2,5D-tekeningVoorbeeld - 2,5D-tekening

Example - 2.5D-drawing


2.5D cut holes in round tube

The images below show the standard way in which round holes (also applies to other forms) are cut into round tubes. 247TailorSteel cuts perpendicular to the material (centre-orientation) meaning that a cylindrical hole is not standard cut cylindrically.

Voorbeeld - getekende afbeelding (l) en afbeelding zoals gesneden (r)Voorbeeld - getekende afbeelding (l) en afbeelding zoals gesneden (r)

Example - drawn image (l) and image as cut (r)

Explanation

The diameter of the round hole, measured on the inside diameter of the round tube, corresponds with the diameter of the drawn hole. The diameter of the hole measured on the outside of the tube, is bigger and elliptical. These holes are not suitable for, for example, wire tapping.

If it is still desirable that such a hole be cut cylindrically, you must inform us of this upon ordering. Immediately after placing the order, we would like to receive a PDF drawing clearly indicating which adaptations must be cut cylindrically. You can send this PDF to tube@247tailorsteel.com.


2,5D-laser cutting in mitre

247TailorSteel cuts 2.5D. This means that the cutting edge is perpendicular to the material (centre-orientation). In case of products that are drawn in mitre, that leads to a groove being created in the outer corner (see images below). These grooves are often filled during welding.

Voorbeeld - kokersVoorbeeld - kokers

Voorbeeld - kokersVoorbeeld - kokers

Example - ducts

Voorbeeld - buizenVoorbeeld - buizen

Example - tubes


Laser cutting of U-shaped products

U-profiles and segments cannot be cut with 247TailorSteel. In this instance, the system does not recognise a tube or duct. It is important that the full circumference of the tube is present somewhere in the drawing. One of the solutions for this is to draw a “ring” of the starting material alongside and to connect this with a small connection (see images). To this end, please note the available material. To this end, look at the “material summary for tube/duct”. The solutions referred to can also be applied to round tubes. If indicated by the Customer, the additional “ring” and/or the “bridge” can be omitted during laser cutting in many cases.

Lasersnijden van U-vormige productenLasersnijden van U-vormige producten

Lasersnijden van U-vormige productenIn addition, there is the option of choosing to draw an additional “bridge” to get the required full circumference (see image).


Connections of tubes

Connections of tubes frequently give problems when drawn in 3D. The online tool, Sophia, does not always convert the cutting lines correctly, so that the mutual connection of the tubes is not “seamless”. In some cases, this can be solved internally, but new drawings are usually requested. Look at the example below of a 3D-drawing with the products as a result and an example of a tube connection drawn fully in 2.5D.

Voorbeeld - 3D-tekening en daadwerkelijk productVoorbeeld - 3D-tekening en daadwerkelijk product

Example - 3D-drawing and the actual product

Voorbeeld - 2,5D-tekening en daadwerkelijk productVoorbeeld - 2,5D-tekening en daadwerkelijk product

Example - 2.5D-drawing and the actual product

PLEASE NOTE!
Every order is unique to us. It is therefore also important that, even in case of recurrent products, the specifications, such as the position of the welding seam or the engraving, are again indicated.


Changelog

DateChange TypeDescription
10/10/2017
  • Publish
Page published