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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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 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. The height or the depth of an ejector mark, relative to the surrounding surface, shall not exceed one-half Figure 13 Application of thickness tolerances to deep hubs14 BSI 12 January of the total 100243-1 permitted, unless stated ne on the agreed forging drawing.
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: This grade should not be specified unless the additional forging cost entailed can be justified by a consequent saving in overall cost. This publication does not purport to include all the necessary provisions of a contract.
Types of inspection documents PD The tolerances specified apply to forgings not exceeding kg in mass or 2 mm maximum dimension. On forged surfaces which are 102243-1 machined subsequently, scale pits and surface dressing shall 1023-1 permitted to a depth equal to one-third of the total value of the thickness tolerance. The positive residual flash and negative trimmed flash values permitted are given in Table 1 dn Table 2.
BS EN – Steel die forgings. Tolerances on dimensions. Drop and vertical press forgings
The residual flash is measured from the body of the forging to the trimmed edge of the flash, as indicated in Figure 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. In such cases these standard tolerances can form only a basis on which to agree modifications appropriate to the particular circumstances.
Ejector mark tolerances are applied independently 102431, and in addition to, any other tolerances. Published on Jul View Download In such cases the factor S4 is used; the 102433-1 to be taken into consideration is only that of a cylinder having diameter d and height e. Dimensional precision requirements are rigorous to the point that a choice may be 100243-1 between forging grade F or forging grade E.
BS EN 10243-1:1999
Above 0,63 up to and including 1. Accept and continue Learn more about the cookies we use and how to change your settings.
Drop and 10243- press forgings Status: 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.
Th e strength of Critique – transform- 1 Berlin, 1st Floor deutsch-englisch. Please download Chrome or Firefox or view our browser tips. Normally the tolerances for the greatest dimension of length or diameter of the forging will be applied but, if more restrictive tolerances em required, those for the specific dimension of the pierced hole may be used.
Where any special tolerances are applicable they are indicated in the example by a small solid black circle alongside the tolerance. As a general rule grade F tolerances result in 10234-1 cheaper forged component.
All variations, including those due to die wear and shrinkage, are included in the length, width and height tolerances. These marks may be either sunken or raised. Amendments issued since publicationAmd.
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. Many instances of heavy die wear occur in which these tolerances are inadequate.
From 10243- 1 the tolerances see Figure 20 are found to be: Where restrictions in deviations of form have been agreed, these will be to ISO and noted on the drawing. Tolerances for fn ends are applied independently of, and in addition to, any other tolerances.
The position of the trimmed flat is measured relative to the theoretical point at which the draft angles meet see Figure The location of burrs shall be indicated to the purchaser on the forging drawing for approval before the commencement of production. All forgings bear the CDP identification mark, unless a different 1 Documents. 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.
The characteristics of the forging process require that, for any given forging, all tolerances for thickness dimensions are uniform. The shape complexity factor of 1024-1 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: Requirements for carbon, carbon manganese and alloy hot worked or cold finished steels.
You may experience issues viewing this site in Internet Explorer 9, 10 or In extreme cases they can cover the whole field of tolerances unless otherwise agreed between the supplier and the purchaser.
Such requirements usually necessitate supplementary operations, e. Considerations of this nature, whilst frequently encountered, are highly individual, and vary widely. Compliance with a British Standard does not of itself confer immunity from legal 102433-1. The total tolerances permitted are shown in Table 3 and Table 4. Only tolerances to grade F shall be eh. Mismatch tolerances are applied independently of any other tolerances. ISO 3, Preferred numbers Series of preferred numbers.
Learn more about the cookies we use and how to change your settings. 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.
Tolerances for heavier or larger forgings shall be agreed at the time of enquiry and order. In those instances where the variation is of importance e.