Method for producing a flange blank and for producing a flange

1. A method for producing a flange blank, comprising the following steps: producing a base body, wherein the base body comprises a fluid passage extending along a longitudinal axis, a support section having a first material thickness, a force-absorbing section having a second material thickness, the second material thickness being greater than the first material thickness, and through-holes, each of the through-holes extending entirely through the force-absorbing section and the support section of the base body; wherein the force-absorbing section is configured for the production of the through-holes selectively according to a first drilling pattern and a second drilling pattern, wherein the force-absorbing section in a plane orthogonal to the longitudinal axis has an outer contour which is configured to be rotationally symmetrical about the longitudinal axis and mirror-symmetrical with respect to a plane of symmetry through which runs the longitudinal axis, and providing the outer contour of the force-absorbing section with non-uniform rounded sections, wherein the rounded sections include one or more first rounded sections having a first radius and one or more second rounded sections having a second radius different than the first radius, wherein the first radius and the second radius are located radially outward of the through-holes of the first drilling pattern and/or the second drilling pattern, and wherein a position, arrangement and/or size of the individual radii is non-uniform with respect to the first drilling pattern and/or the second drilling pattern.

2. The method as claimed in claim 1 , wherein an outer contour of the support section defines an outer most contour of the flange blank and the outer contour of the support section is substantially circular.

3. The method as claimed in claim 1 , wherein the through-holes comprise an even number of through-holes.

4. The method as claimed in claim 1 , wherein the support section comprises two opposite notches that lie inside the plane of symmetry through which runs the longitudinal axis.

5. The method as claimed in claim 1 , wherein the step of producing a base body comprises one or both of the following steps:

producing a flange blank casting by a casting method;

reworking the flange blank casting by a machining method.

6. The method as claimed in claim 5 , wherein the flange blank casting is produced by using a two-part, casting mold.

7. A method for producing a flange, comprising the following steps:

producing a number of flange blanks by the method as claimed in claim 1 , and

selectively producing through-holes according to at least one of the first drilling pattern and/or the second drilling pattern in the force-absorbing section of the base body.

8. The method as claimed in claim 7 , wherein the step of selectively producing through-holes according to a first drilling pattern and/or a second drilling pattern in the force-absorbing section of the base body comprises one, several, or all of the following steps:

producing a first number of bores according to the first drilling pattern in the force-absorbing section of the base body;

producing bores in a first arrangement according to the first drilling pattern in the force-absorbing section of the base body;

producing a second number of bores according to the second drilling pattern in the force-absorbing section of the base body;

producing bores in a second arrangement according to the second drilling pattern in the force-absorbing section of the base body.

9. The method as claimed in claim 7 , wherein the step of selectively producing through-holes according to a first drilling pattern and/or a second drilling pattern in the force-absorbing section of the base body comprises one of the following steps:

selecting and using a first casting insert to produce through-holes according to the first drilling pattern;

selecting and using a second casting insert to produce through-holes according to the second drilling pattern;

selecting and using a third casting insert to produce through-holes according to the first and the second drilling pattern.

10. The method as claimed in one of claims 7 to 9 , further comprising

a plurality of identical flange blanks before through-holes according to the first drilling pattern are produced in the force-absorbing section of the base body of a first flange blank and through-holes according to the second drilling pattern are produced in the force-absorbing section of the base body of a second flange blank.

11. A flange blank for producing a flange, comprising a base body which comprises a fluid passage extending along a longitudinal axis, a support section having a first material thickness and a force-absorbing section having a second material thickness, and through-holes, each of the through-holes extending entirely through the force-absorbing section and the support section of the base body, wherein the second material thickness is greater than the first material thickness, wherein the force-absorbing section is configured for the production of the through-holes selectively according to a first drilling pattern and a second drilling pattern, wherein the force-absorbing section in a plane orthogonal to the longitudinal axis has an outer contour which is configured to be rotationally symmetrical about the longitudinal axis and mirror-symmetrical with respect to a plane of symmetry through which runs the longitudinal axis, wherein the outer contour of the force-absorbing section comprises non-uniform rounded sections, wherein the rounded sections include one or more first rounded sections having a first radius and one or more second rounded sections having a second radius different than the first radius, wherein the first radius and the second radius are located radially outward of the through-holes of the first drilling pattern and/or the second drilling pattern, and wherein a position, arrangement, and/or size of the individual radii is non-uniform with respect to the first drilling pattern and/or the second drilling pattern.

12. The flange blank as claimed in claim 11 , wherein the force-absorbing section is adapted to fully surround central axes of the through-holes of the first drilling pattern and second drilling pattern.

13. The flange blank as claimed in claim 12 , wherein one or more of the radii of the rounded sections each run coaxially to a central axis of the through-holes of the first drilling pattern or the second drilling pattern.

14. A method for producing a flange blank, comprising the following steps: producing a base body, wherein the base body comprises a fluid passage extending along a longitudinal axis, a support section having a first material thickness and a force-absorbing section having a second material thickness, the second material thickness being greater than the first material thickness, and through-holes, each of the through-holes extending entirely through the force-absorbing section and the support section of the base body; wherein the force-absorbing section is configured for the production of the through-holes selectively according to a first drilling pattern and a second drilling pattern, wherein the force-absorbing section in a plane orthogonal to the longitudinal axis has an outer contour which is configured to be rotationally symmetrical about the longitudinal axis or mirror-symmetrical with respect to a plane of symmetry through which runs the longitudinal axis, and providing the outer contour of the force-absorbing section with non-uniform rounded sections, wherein the rounded sections include one or more first rounded sections having a first radius and one or more second rounded sections having a second radius different than the first radius, wherein the first radius and the second radius are located radially outward of the through-holes of the first drilling pattern and/or the second drilling pattern, and wherein a position, arrangement and/or size of the individual radii is non-uniform with respect to the first drilling pattern and/or the second drilling pattern; wherein the through-holes comprise an even number of through-holes, and/or wherein the support section comprises two opposite notches that lie inside the plane of symmetry through which runs the longitudinal axis, and wherein each of the through-holes is disposed on a side of the plane of symmetry.

15. The method as claimed in claim 14 , wherein an outer contour of the support section defines an outer most contour of the flange blank and the outer contour of the support section is substantially circular.

16. The method as claimed in claim 1 , wherein the through-holes comprise an even number of through-holes, and wherein the support section comprises two opposite notches that lie inside the plane of symmetry through which runs the longitudinal axis, and

wherein each of the through-holes is disposed on a side of the plane of symmetry.