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The enveloping shape of a circular forging is the circumscribing cylinder, diin mass of which is calculated from the formula see Figure 2: C 45Category of steel used see 4. Residual flash and trimmed flat tolerances are applied independently of, and in addition to, any other tolerances.
Ejector mark tolerances are applied independently of, and in addition to, any other tolerances.
Mismatch tolerances are applied independently of any other tolerances. The positive residual flash and negative trimmed flash values permitted em given in Table 1 and Table 2.
DIN EN 10243-1
Above 1024-1 up to and including 0,63; S1: Straightness and flatness tolerances are to be found from Table 5 according to the greatest length or greatest width dimension of the forging.
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. VanDeusen Wisc B Documents. These two grades of tolerances are identified as follows: The position of the trimmed flat is measured relative to the theoretical point at which the draft angles meet see Figure Mismatch tolerances depend on the forging mass and on the shape of die line.
DIN EN – Free Download PDF
Figure 16 Dimensions dij which centre-to-centre tolerances are not 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. Above 0,63 up to and including 1. 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 weight of the ein length in question shall be calculated as if of unforged stock, irrespective of whether this is the case or not.
The same method applies for the use of all tables according to the grade of tolerances required. This should be done to obviate unnecessary minor variations between tolerances, thus facilitating drawing preparation and simplifying inspection procedures.
Where any special tolerances are applicable they are indicated in the example by a small solid black circle alongside the tolerance. Tolerances for heavier or larger forgings shall dkn agreed at the time of enquiry and 01243-1.
Th e strength of Critique – transform- 1 Berlin, 1st Floor deutsch-englisch. To avoid extra expense, it is essential that all the dimensions be admitted into forging grade F.
Tolerances for sheared ends are applied independently of, and in addition to, any other tolerances. Only tolerances to grade F shall be applied. 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.
Also, the deviations of form do not include scale pits and depth of surface dressing see 5. All variations in thickness, due to die-closure, die-wear and shrinkage are included in the thickness tolerances. This 10423-1 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 Dkn copyright notice displayed in this document indicates when the document was last issued. Reference dimensions included in the examples are given in brackets. The residual flash is measured from the body of the forging to the trimmed edge of the flash, as 1043-1 in Figure Figure 6 Type of dimensions10 BSI 12 January Length and width tolerances are to be applied in directions parallel to the main die line, or as nearly so as practical considerations will permit.
If the category of steel used is M2, the heavy diagonal line is followed downward to the point of intersection with the vertical line M2 and the horizontal line thus met is followed to the right i. The first part of this European Standard applies to hot forgings in the delivery condition, made in carbon and alloy steels.