Method and apparatus for precision rolling of rotationally symmetrical components
View Patent ↗An apparatus ( 1 ) and a method serve for precision rolling of a surface area ( 2 ) of a rotationally symmetrical component ( 3 ), especially a screw. The apparatus ( 1 ) includes at least two spaced apart rolling tools ( 4, 5 ), a measuring unit ( 9 ) for determining an actual blank diameter of the component ( 3 ), an evaluating unit ( 10 ) for comparing the determined actual blank diameter of the component ( 3 ) with a predetermined blank diameter and for determining an adjustment value from the result of the comparison, and a control unit ( 11 ) for adjusting a distance between the at least two rolling tools ( 4, 5 ) in response to the adjustment value.
1. An apparatus for precision rolling of a surface area of a rotationally symmetrical component, comprising:
at least two spaced apart rolling tools;
a unit for determining an actual blank diameter of the component, the blank diameter being a diameter of the component before rolling;
a unit for comparing the determined actual blank diameter of the component with a predetermined blank diameter and for determining an adjustment value from the result of the comparison; and
a control unit for adjusting a distance between said at least two rolling tools in response to the adjustment value.
2. The apparatus of claim 1 , wherein said unit for determining the actual blank diameter of the component is designed as a measuring unit.
3. The apparatus of claim 1 , wherein said unit for determining the actual blank diameter of the component is designed as an interface to a measuring unit.
4. The apparatus of claim 1 , wherein said unit for comparing the actual blank diameter of the component with a predetermined blank diameter and for determining an adjustment value from the result of the comparison is designed as an evaluating unit.
5. The apparatus of claim 2 , wherein said unit for comparing the actual blank diameter of the component with a predetermined blank diameter and for determining an adjustment value from the result of the comparison is designed as an evaluating unit.
6. The apparatus of claim 3 , wherein said unit for comparing the actual blank diameter of the component with a predetermined blank diameter and for determining an adjustment value from the result of the comparison is designed as an evaluating unit.
7. The apparatus of claim 1 , wherein said unit for comparing the actual blank diameter of the component with a predetermined blank diameter and for determining an adjustment value from the result of the comparison is designed as an interface to an evaluating unit.
8. The apparatus of claim 2 , wherein said unit for comparing the actual blank diameter of the component with a predetermined blank diameter and for determining an adjustment value from the result of the comparison is designed as an interface to an evaluating unit.
9. The apparatus of claim 3 , wherein said unit for comparing the actual blank diameter of the component with a predetermined blank diameter and for determining an adjustment value from the result of the comparison is designed as an interface to an evaluating unit.
10. The apparatus of claim 4 , wherein said evaluating unit is designed and arranged to associate the determined actual blank diameter of the component to a specific group of a plurality of groups, each of said groups containing a specific adjustment value.
11. The apparatus of claim 7 , wherein said evaluating unit is designed and arranged to associate the determined actual blank diameter of the component to a specific group of a plurality of groups, each of said groups containing a specific adjustment value.
12. The apparatus of claim 10 , wherein said evaluating unit is designed and arranged to determine the adjustment values based on a comparison of a determined actual finished part diameter of the component with a predetermined desired finished part diameter for each one of the plurality of groups.
13. The apparatus of claim 11 , wherein said evaluating unit is designed and arranged to determine the adjustment values based on a comparison of a determined actual finished part diameter of the component with a predetermined desired finished part diameter for each one of the plurality of groups.
14. The apparatus of claim 2 , wherein said measuring unit is designed as a mechanical measuring unit.
15. The apparatus of claim 2 , wherein said measuring unit is designed as an optical measuring unit.
16. An apparatus for rolling a surface area of a rotationally symmetrical component, comprising:
at least two spaced apart rolling tools, said rolling tools being designed and arranged to machine at least a section of the surface area of the component by rolling, said rolling tools being designed and arranged such that a distance between said rolling tools is adjustable by moving said rolling tools with respect to one another;
a measuring unit, said measuring unit being designed and arranged to determine an actual blank diameter of the component, the blank diameter being a diameter of the component before rolling;
an evaluating unit, said evaluating unit being designed and arranged to associate the determined actual blank diameter of the component to an adjustment value, the adjustment value being contained in a specific group of a plurality of groups, each of the groups being associated with a plurality of predetermined blank diameters of the component; and
a control unit, said control unit being designed and arranged to adjust the distance between said at least two rolling tools depending on the adjustment value.
17. A method of precision rolling of a surface area of a rotationally symmetrical component, said method comprising the steps of:
determining an actual blank diameter of the component, the blank diameter being a diameter of the component before rolling;
comparing the determined actual blank diameter of the component with a predetermined blank diameter;
determining an adjustment value from the result of the step of comparing;
adjusting a distance between at least two rolling tools in response to the adjustment value; and
machining at least a section of the surface area of the component by rolling.
18. The method of claim 17 , wherein said steps of comparing and determining include the steps of:
associating the determined actual blank diameter of the component to an adjustment value, the adjustment value being contained in a specific group of a plurality of groups, each of the groups being associated with a plurality of predetermined blank diameters of the component.
19. The method of claim 18 , further comprising the following step before the step of determining the actual blank diameter of the component:
determining the adjustment values based on a comparison of a determined actual finished part diameter of the component with a predetermined desired finished part diameter for each one of the plurality of groups.
20. The method of claim 17 , wherein said component is a fastener.
21. The method of claim 20 , wherein said fastener is a screw.
22. The method of claim 20 , wherein a profiled section of the fastener is produced in said step of machining.