DIN EN – Free download as PDF File .pdf), Text File .txt) or read online for free. 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.
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This grade should not be specified unless the additional forging cost entailed can be justified by a consequent saving in overall cost. You may experience issues viewing this site in Internet Explorer 9, 10 or These are dimensions which would lead to over definition geometrically, or contradictions when given a tolerance. See us on booth at NPE Documents.
Above 0,32 up to and including 0,63; S1: They apply within the limits stated below unless the purchaser specifies otherwise. The characteristics of the forging process require that, for any given forging, all tolerances for thickness dimensions are uniform.
The nominal een and the location of ejector marks will be indicated to the purchaser on the forging drawing before the commencement of production. Above 0,63 up to and including 1. Ej requirements usually necessitate supplementary operations, e. The total tolerances permitted are shown in Table 3 and Table 4. Annex A gives for information 10243–1 examples of the application of these tolerances for different types of closed die forgings. Where any special tolerances are applicable they are indicated in the example by a small solid black circle alongside the tolerance.
This should be done to obviate unnecessary 102431 variations between tolerances, thus facilitating drawing preparation and simplifying inspection procedures. Please download Chrome or Firefox or view our browser tips. Centre-to-centre tolerances shall be applied independently of, and in addition to, any other tolerances.
Flatness tolerances relate to deviations of surfaces from the specified contour.
BS EN – Steel die forgings. Tolerances on dimensions. Drop and vertical press forgings
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 1243-1 die forgings Tolerances on dimensions Part 1: Examples are shown of circular and non-circular forgings see Figure 2 and Figure 3. This special procedure is not applied if larger tolerances will result from use of the normal procedure as shown in 4.
The minus tolerances do not apply to edge radii up to and including 3 mm when such radii are affected by subsequent removal of draft by trimming or punching.
By further movement to the right, the correct tolerance is found under the appropriate vertical column heading for the dimension concerned wherever possible the greatest dimension of length, width or height see 5. Such special tolerances should be negotiated between the purchaser and the supplier in accordance with 1.
Instances occur in which the negative tolerances for such local deviations cannot be permitted on unforged stock where it is not subsequently machined. Types of inspection documents PD When tolerances for sheared ends are required, this will be indicated to the enn on the forging drawing before the commencement of production.
The shape complexity factor of a forging is the ratio of the mass of dn forging to the mass1 of the enveloping shape necessary to accommodate the maximum dimensions of the forging: Tolerances for fillet and edge radii shown in Table 6 are applicable to both grade E and grade F.
Ejector mark tolerances are applied independently of, and in addition to, any other tolerances.
BS EN 10243-1:1999
Pieces executees a chaud sur marteaux-pilons presses verticales Title in German Gesenkschmiedeteile aus Stahl. The horizontal line is then followed to the right. While grade E close tolerances may be applied to all dimensions on one forging, it is more economical to apply them only to those specific dimensions on which closer tolerances are essential.
Ost 10243-11 71 english translation deutsch, francais, italiano Business. Tolerances for the maximum permissible extent of burr relative to such edges are based on the weight of the forging, in accordance with Table 6 and are applied unless the purchaser specifies otherwise.
The tolerance grade and tolerances given on the drawings are examples only and should not be regarded as either mandatory, recommended or minimum requirements since in practice the tolerances will depend on both the capability of the forging equipment and the requirements of the purchaser. They are not used for check measurements on the actual forging, but for tool construction when forging dimensions are not measurable.
In the case of a forging having a flange from which projects: Th e strength of Critique – transform- 1 Berlin, 1st Floor deutsch-englisch. Deviations of straightness or flatness as given in Table 5 are not included in the above-mentioned faults of form. Base all thickness tolerances except those for overall thickness on dimension t shown above.
102431 those instances where the variation is of importance rn. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.