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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C 45Category of steel used see 4. The tolerances are determined from Table 3 and Table 4 in accordance with the greatest thickness dimension of the forging.
While grade E close tolerances may be applied to all dimensions on one forging, it is more economical to 102443-1 them only to those specific dimensions on which closer tolerances are essential.
The supplier will draw the attention of the purchaser to such instances and it will be necessary to negotiate greater tolerances on the draft angle surfaces to meet these circumstances.
To determine length, width and height tolerances, reference is first made to the appropriate category in the mass column. Flatness tolerances relate to deviations of surfaces from the specified contour.
DIN EN – Free Download PDF
In both cases, the permissible deviations shall be mentioned besides the relative measurements in the drawings of the forgings. This special procedure is not applied if larger tolerances will result from use of the normal procedure as shown in 4. The permissible length of local deviation from the bar stock diameter or section adjoining a forged portion shall be up to 1,5 times the bar stock diameter or largest cross-sectional dkn, but with a maximum value of mm see Figure Dimensional checks regarding depth of scale pits or any other point in question should be made in relation to the machining locations.
Deviations of straightness or flatness as given in Table 5 are not included in the above-mentioned faults of form. Figure 16 Dimensions to which centre-to-centre tolerances are 110243-1 applicable other than by negotiation Figure 17 Fillet and edge radii16 BSI 12 January Burr tolerances are applied independently of, and in addition to, any other tolerances.
DIN EN 10243-1
Above 0,16 up to and including 0,32; S2: If the category of steel used is M2, the heavy diagonal line is followed downward fn the point of intersection with the vertical line M2 and the horizontal line thus met is followed to the right i. Up to and including 0,16;S3: These marks may be either sunken or raised. They are not used for check measurements on the actual forging, but for tool construction when forging 1024-31 are not measurable.
Tolerances for the maximum permissible extent of such distortion are based on the nominal diameter of the unforged stock in accordance with Table 6 and Figure 102433-1 the tolerances for the greatest dimension of length or diameter of 1023-1 forging will be applied but, if more restrictive tolerances are required, those for the specific dimension of the pierced hole may be used.
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.
Straightness and flatness tolerances are to be found from Table 5 according to the greatest length or greatest width dimension of the forging. If the category of steel dln is M1, the same horizontal line is followed further to the right. In extreme cases they can cover the whole field of tolerances unless otherwise agreed between the supplier and the purchaser.
They are classified into four groups; accordingly each of them is displayed in the table. A similar procedure is followed for the factor of shape complexity so that downward displacement of the horizontal line used is nil, one place, two places and three places for factors S1, S2, S3 and S4 respectively.
The BSI copyright notice displayed in this document indicates when the document was last issued. This approach will ensure that optimum use is made of the forging process in fulfilling the purchaser’s special requirements at the lowest additional cost. Tolerances for heavier or larger forgings shall be agreed at the time of enquiry and order. For that reason measurements should be made at areas of the forging least affected by die wear.
In those instances where the variation is of importance e.
The tolerances specified apply to forgings not exceeding kg in mass or 2 mm maximum dimension. These are dimensions which would lead to over definition geometrically, or contradictions when given a 01243-1. See us on booth at NPE Documents. Formula for calculating mismatch: Annex A gives for information some examples of the application of these tolerances for different types of closed die forgings. Such requirements usually necessitate supplementary operations, e.
The category of steel used is determined as being within one of the following: