Find the most up-to-date version of DIN EN at Engineering Buy DIN EN STEEL DIE FORGINGS – TOLERANCES ON DIMENSIONS – PART 1: DROP AND VERTICAL PRESS FORGINGS. Standard DIN EN Steel die forgings – Tolerances on dimensions – Part 1: Drop and vertical press forgings; German version EN.
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Compliance with a British Standard does not of itself confer immunity from legal obligations.
In such cases the minus tolerance is modified to allow for the formation of a square corner. To determine length, width and height tolerances, reference is first made to the appropriate category in the mass column. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member.
While grade E close tolerances may be applied to all dimensions 102443-1 one forging, it is more economical to apply them only to those specific dimensions on which closer tolerances are essential. This grade should not be specified unless the additional forging cost entailed can be justified by a consequent saving in overall cost.
Examples are shown of circular and non-circular forgings see Figure 2 and Figure 3.
To avoid extra expense, it is essential that all the dimensions be admitted into forging grade F. Up to and including 0,16;S3: Base all thickness tolerances except those for overall thickness on dimension t shown above.
Where restrictions in deviations of form have been agreed, these will be to ISO and noted on the drawing. Also, the deviations of form do not include scale pits and depth of surface dressing see 5. These marks may be either sunken or raised. Tolerances for fillet radii and edge radii are shown in Table 6 and examples of such radii sin shown in Figure The characteristics of the forging process require that, for any given forging, all tolerances for thickness dimensions are uniform.
For dimensions from a centre to a surface see Figure 9 and for dimensions on steps within one die, the tolerances for the greatest length, width and height shall apply wherever possible.
S3Type of steel used: Dimensional precision requirements are rigorous to the point that a choice may be made between forging grade F or forging grade E.
When a forging een produced at the extremity of a portion dn unforged stock, the length tolerance from any inner face of the forged portion to that extremity shall be determined from Table 1 employing the category of steel used M1 and shape complexity factor S1. Mismatch tolerances are applied independently of any other tolerances. Dimensional checks regarding depth of scale pits or any other point in question should be made in relation to the machining locations.
This European Standard does not apply to upset forgings made on horizontal forging machines see EN Above 0,63 up to and including 1. They apply within the limits stated below unless the purchaser specifies otherwise.
DIN EN – Free Download PDF
The application of such tolerances should be kept to a minimum and, in these instances, the tolerances shall be indicated clearly against the appropriate dimension s on the forging drawing. Tolerances for sheared ends are applied independently of, and in addition to, any other tolerances. The centre-to-centre tolerances provided in this standard apply only when a straight line joining the two centres occurs within the profile of the forging see Figure Only tolerances to grade F shall be applied.
Straightness and flatness tolerances are to be found from Table 5 according to the greatest length or greatest width dimension of the forging. Tolerances for fillet and edge radii shown in Table 6 are applicable to both grade E and grade F.
ISO 3, Preferred numbers Series of preferred numbers. Ejector mark tolerances are applied independently of, and in addition to, any other tolerances.
DIN EN 10243-1
Los resortes de troquel MDL estn diseados para ser intercambiables enn los resortes de Danly y otros If the category of steel used is M1, the same horizontal line is followed further to the right. Summary of pagesThis document comprises a em cover, an inside front cover, the EN title page, pages 2 to 34, an 10243–1 back cover and a back cover.
Where more restrictive tolerances are required for application to individual dimensions of thickness, supplementary operations are involved. Mismatch tolerances depend on the forging mass and on the shape of die line. Such requirements usually necessitate supplementary operations, e. See also Figure Formula for calculating mismatch: A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the English versionSteel die forgings Tolerances on dimensions Part 1: The shape complexity ne of a forging is the ratio of the mass of the forging to the mass1 of the enveloping shape necessary to accommodate the maximum dimensions of the forging: