VDI / VDE 2862

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The VDI / VDE 2862 is a directive of the Association of German Engineers (VDI), dedicated to the application of fastening systems ( tools for screw engaged). It has been in effect for the automotive industry since 1999 (see history), since 2015 for all plant, machine and apparatus manufacturers - and thus for the entire assembly industry.

Summary

According to VDI and the publishing company Beuth Verlag , the guideline defines screwdriving classes and minimum requirements for the assembly tools used and thus represents a cross-technology basis for the use of screwdriving systems and screwdriving tools in plant and mechanical engineering as well as for pressure-bearing components. The guideline gives the user basic conditions for the selection of screwdriving tools and thus guarantees safe screwing during production. This is achieved, among other things, by: unambiguous classification of the screw connections in categories, by defining the minimum requirements for the screwing tools / screwing systems for the respective category and by defining minimum requirements for fault detection within the respective category. The specified minimum requirements are general and independent of the solution. You are not tied to specific system structures, screwing concepts or assembly technologies.

history

  • 1999: The guideline was first published in 1999 as "VDI 2862: Use of screw systems in the automotive industry".
  • 2009: "VDI / VDE 2862: Minimum requirements for the use of screwdriving systems and tools in the automotive industry"
  • 2012: "VDI / VDE 2862 sheet 1: Minimum requirements for the use of screwing systems and tools - applications in the automotive industry"
  • 2015: "VDI / VDE 2862 sheet 2: Minimum requirements for the use of screwing systems and tools - applications in plant, machine and apparatus construction as well as for flange connections on pressure-bearing components"

meaning

This guideline gives processing companies a certain degree of legal certainty about what needs to be observed for screw connections in production. However, this also means that they have to comply with these requirements. The guideline is very recognized in the industry and thus represents the state of the art in science and technology. In cases of product complaints and product liability, companies must generally prove that they have worked according to the state of the art. Can you prove that you are in the assembly z. B. working according to VDI / VDE 2862, a big step is already done.

Definition of the requirements and screw joint classes

Both sheets of VDI / VDE 2862 are essentially identical. They define the minimum technical requirements for the tightening technology used, depending on the risk involved in the tightening and the assembly process. For this purpose, the screw connections are divided into classes A, B and C ("categorization", often also called "classification") - according to the risk of failure and the possibility of detecting and avoiding any incorrect screw connections during assembly (safeguard ).

  • Category A screw connections (in the event of failure) pose a risk to life and limb as well as the environment.
  • Category B screw connections pose a risk of functional failure (in the event of failure) (so-called "breakdowns").
  • Category C screw connections pose no risk ("Not A or B class").
If the screws on a ladder loosen, someone could be injured. The manufacturer should classify these screw connections as critical to safety

The formulations “critical to safety” for class A, “functionally critical” for class B and (more recently) “uncritical” for class C are also common. The screw connections in this class were previously referred to as “customer-critical” because a failure initially affected the customer or User annoyed, but no function and security is not impaired.

Examples of class A screw connections are the screw connections of the seat belt or the steering column of a vehicle. Class B includes all screws that are important for the proper and intended function of the component.

For rail vehicles, DIN 25201 applies analogously, which evaluates the screwdriving applications according to high (H), medium (M) and low (G) risk.

swell

  1. ↑ http://www.vdi.de
  2. ↑ http://www.beuth.de : Technical rule VDI / VDE 2862 sheet 2: 2015-02
  3. ↑ "Screw joint classification according to VDI 2862, sheet 2: What you need to know now!": In: Der Zuliefermarkt, February 2015 (Carl Hanser Verlag GmbH & Co. KG, ISSN  1616-3052 )
  4. ↑ "Mechanical engineers must act now". In: Construction Practice, February 2015 (Vogel Industrie Medien GmbH & Co. KG, ISSN  0937-4167 )
  5. ↑ DIN 25201-1: 2015-12: Construction guideline for rail vehicles and their components - Bolted connections - Part 1: Classification, categories of bolted connections