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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DIN EN – Free Download PDF
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.
From Table diin the tolerances see Figure 20 are found to be: For that reason measurements should be made at areas of eh forging least affected by die wear.
Mismatch tolerances depend on the forging mass and on the shape of die line. Compliance with a British Standard does not of itself confer immunity from legal obligations. 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.
This approach will ensure 12043-1 optimum use is made of the forging process in fulfilling the purchaser’s special requirements at the lowest additional cost. 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 dimension, but with a maximum value of mm see Figure These normative references are cited at the appropriate places in the text and the publications are listed hereafter.
When tolerances for sheared ends are required, this will be indicated to the purchaser on the forging drawing before the commencement of production.
The application of such tolerances should be kept to a minimum and, in these instances, the tolerances shall be indicated clearly against the appropriate dimension s on the forging drawing.
The location of burrs shall be indicated to the purchaser on the forging drawing for approval before the commencement of production. All variations in thickness, due to die-closure, die-wear and shrinkage are included in the thickness tolerances.
Permissible tolerances based on the greatest dimensions are usually obtained from the appropriate table Maximum length: Length, width and height tolerances are shown in Table 1 and Table 2 as applied to dimensions between external surfaces see Figure 7i. Users are responsible for its correct application.
DIN EN 10243-1
All forgings bear the CDP identification mark, unless a different 1 Documents. They apply within the limits stated below unless the purchaser specifies otherwise. For dimensions from a centre to a surface see Figure 9 and for dimensions on steps within one die, the tolerances for the greatest length, width and height shall apply wherever possible.
Where any special tolerances are applicable they are indicated in the example by a small solid black circle alongside the tolerance.
See also Figure Above 0,63 up to and including 1.
As a general rule grade F tolerances result in a cheaper forged component. Reference dimensions included in the examples are given in brackets. They shall be taken from Table 1 and Table 2. They are not used for check measurements on the actual forging, but for tool construction when forging dimensions are not measurable. The tolerances specified apply to forgings not exceeding kg in mass or 2 mm maximum dimension. On forged surfaces which are not machined subsequently, scale pits and surface dressing shall be permitted to a depth equal to one-third of the total value of the thickness ein.
Normally the tolerances for the greatest dimension of length or diameter of the forging will be applied but, if more restrictive tolerances are required, those for the specific dimension of the pierced hole may be used.
Above 0,32 up 10243–1 and including 0,63; S1: These two eb of tolerances are identified as follows: Annex A gives for information some examples of the application of these tolerances for 01243-1 types of closed die forgings.
Tolerances for the ddin permissible extent of such distortion are based on the nominal diameter of the unforged stock in accordance with Table 6 and Figure In such cases, special tolerances shall be negotiated with the purchaser before the commencement of production. Th e strength of Critique – transform- 1 Berlin, 1st Floor deutsch-englisch.
Where more restrictive tolerances are required for application to individual dimensions of thickness, supplementary operations are involved.