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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Many instances of heavy die wear occur in which een tolerances are inadequate. All forgings bear the CDP identification mark, unless a different 1 Documents. The cost of the forged part can be higher if grade E tolerances are selected, but the need for subsequent machining operations can often be reduced.
The position of the trimmed flat is measured relative 110243-1 the theoretical point at which the draft angles meet see Figure The characteristics of the forging process require that, for any given forging, all tolerances for thickness dimensions are uniform.
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. Also, the deviations of form do not include scale pits and depth of surface dressing see 5. The weight of the total length in question shall be calculated as if of unforged stock, irrespective of whether this is the case or not.
Please download Chrome or 10234-1 or view our browser tips. Pieces executees a chaud sur marteaux-pilons presses verticales Title in German Gesenkschmiedeteile aus Stahl. See also Figure Instances occur in which the negative tolerances for such local deviations cannot be permitted on unforged stock where it is not subsequently machined. Amendments issued since publicationAmd.
When tolerances for sheared ends are required, this will be indicated to the purchaser on the forging drawing before the commencement of production. For centre-to-centre dimensions greater than 1 mm length, tolerances from Table 1 or Table 2, with equal plus or minus dispersions, shall be applied.
If the category of steel used is M1, the same horizontal line is followed further to the right. The total tolerances permitted are shown in Table 3 and Table 4.
Tolerances for sheared ends are applied independently of, and in addition to, any other tolerances. The BSI copyright notice displayed in this document indicates when the document was last issued.
The nominal diameter and the location of ejector marks will be indicated to the purchaser on the forging drawing before the commencement of production.
The tables showing dimensional tolerances are based on the R20 series of preferred numbers see ISO 3. VanDeusen Wisc B Documents. They are best dealt with by consultation at the design stage and shall be agreed between the purchaser and the supplier. Such requirements usually necessitate supplementary operations, e. In such cases these standard tolerances can form only a basis on which to agree modifications appropriate to the particular circumstances.
Where restrictions in deviations of form have been agreed, these will be to ISO and noted on the drawing. 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 102431- applied unless the purchaser specifies otherwise.
Instances occur in which this tolerance is inadequate. You may find similar items 102433-1 these categories by selecting from the choices below:. Accept and continue Learn more about the cookies we use and how to change your settings.
BS EN – Steel die forgings. Tolerances on dimensions. Drop and vertical press forgings
Permissible tolerances based on the greatest dimensions are usually obtained from the appropriate table Maximum length: Types of inspection documents PD Worldwide Standards We can source any standard from anywhere in the world. 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.
To determine the category in which a steel belongs, the maximum permitted content of the elements in the steel specification shall be the values used. When a forging is produced at the extremity of a portion of unforged stock, the length tolerance from any inner face of ne forged portion to that extremity shall be determined from Table 10234-1 employing the category of steel used M1 and shape complexity factor S1.
On forged surfaces which are not 102243-1 subsequently, scale pits and surface dressing shall be permitted to a depth equal to one-third of the total value of the thickness tolerance.
BS EN 10243-1:1999
Users are responsible for its correct application. These two grades of tolerances are identified as follows: 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. This European Standard is considered to be a supporting standard to those application and product standards which in themselves support an essential safety requirement of a New Approach Directive and which make reference to this European Standard.
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 This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by Marchand conflicting national standards shall be withdrawn at the latest by March 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: Published on Jul View Download Reference dimensions included in the examples are given in brackets.
Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 34, an inside back cover and a back cover.
When straightness tolerances or flatness tolerances are required, this shall be indicated on the agreed forging drawing.
Ejector mark tolerances are applied independently of, and in addition to, any other tolerances.