Industriell processtyrning

Kommittébeteckning: SIS/TK 275 (Verktygsmaskiner - Säkerhet)
Källa: CEN
Svarsdatum: den 7 jan 2021
Se merSe mindre
 

This standard specifies the technical safety requirements and protective measures to be adopted by persons undertaking the design, construction and supply (including installation and dismantling, with arrangements for transport and maintenance) of stationary machines for working of cold metal and other non-combustible, cold, material, excluding wood and stone, with geometrically-defined cutting edge tools (milling).

This standard includes the following machines, capable of performing milling and boring operations but is not limited to these:

a) Manually controlled boring and milling machines without numerical control (see 3.2.1, group 1), e.g.
- knee and column type milling machines (see figure C.1)
- boring and milling machines (see figure C.2)

b) Manually controlled boring and milling machines with limited numerical controlled capability (see 3.2.2,
group 2), e.g.
- plano–milling machines (see figures C.3 and C.4)
- profile and contouring milling machines

c) Numerical controlled milling machines, milling- and machining centres (see 3.2.3, group 3), e.g.
- automatic milling machines and milling centres, e.g. multi–spindle milling machines, gear-milling machines (see figures C.5, C.6 and C.7)
- machining centres

d) Transfer and special purpose machines (see 3.2.4, group 4), which are designed to process only a prespecified metal or analogous material workpiece, or limited family of similar workpieces by means of a predetermined sequence of machining operations and process parameters (see figures C.8, C.9, C.10, C.11, C.12 and C.13).

This international standard takes account of intended use, including reasonably foreseeable misuse, maintenance, cleaning, and setting operations. It specifies access conditions to operator positions and manual load/unload stations. It presumes accessibility to the machine from all directions. It describes means to reduce risks to operators and other exposed persons.

This international standard also applies to workpiece transfer devices including transport devices for loading/unloading when they form an integral part of the machine.

This international standard deals with significant hazards relevant to milling machines when they are used as intended and under the conditions foreseen by the manufacturer (see 4).

This standard does not deal with any hazard relating to processing lasers. Processing laser hazards are covered by ISO 11553-1.

The hazards associated with ejected workpieces and parts of the machine cannot be underestimated. This standard uses current, state-of-the art methods to determine guard thickness which will retain the majority of these within the enclosure in the event of an incident which has been used successfully for many years (see Annex A). However, it is physically impossible to guarantee that all types of such items will be retained (dependent upon their weight, size and ejection energies etc.) so a possibility remains that ejection through the guard can occur.

Further to this, the very nature of group 1 machines is that they are unguarded from an ejection hazard point of view so this hazard exists to a greater extent in this type of machine. In the case where specific knowledge is known about these items, additional measures can be taken to further minimise these risks but these actions remain outside the scope of this standard.

This standard applies to machines which are manufactured after its date of publication.