Apparatus and method for making bores in an edge of a turbine blade
An apparatus for making bores in a turbine blade edge is provided. The apparatus includes a drilling device and a guide for the drilling device. The guide includes a bearing element with a gap which is delimited by bearing faces and has the shape of a turbine blade edge. Further, the apparatus includes two guide modules which lie opposite one another and are brought to bear with a side face of the turbine blade and which together form a tension device for fixing the guide on the turbine blade. Furthermore, a method for making bores in a turbine blade edge using such an apparatus is provided.
1. An apparatus for making bores in an edge of a turbine blade, comprising:
a drilling device with a rotating electrode as a drilling tool; and
a guide for the drilling device,
wherein the guide includes
a bearing element, a gap being formed in the bearing element, the gap being delimited by bearing faces and having a contour corresponding to a shape of a turbine blade edge to be machined, and
at least two guide modules lying opposite one another,
wherein the guide modules together form a tension device for fixing the guide on the turbine blade, and
wherein the bearing element of the guide includes a clearance for leading through the rotating electrode.
2. The apparatus as claimed in claim 1 , wherein the guide modules, when forming the tension device for fixing the guide on the turbine blade, bear with a side face of the turbine blade.
3. The apparatus as claimed in claim 1 , wherein the gap in the bearing element is delimited by two bearing prisms.
4. The apparatus as claimed in claim 1 , wherein at least a region of the guide in which the clearance is formed comprises an electrically insulating material.
5. The apparatus as claimed in claim 1 , wherein the clearance is arranged in line with the gap.
6. The apparatus as claimed in claim 4 , wherein the clearance is arranged in line with the gap.
7. The apparatus as claimed in claim 1 , wherein at least one of the guide modules has a cylindrical locating element.
8. The apparatus as claimed in claim 3 , wherein at least one of the guide modules has a cylindrical locating element.
9. The apparatus as claimed in claim 4 , wherein at least one of the guide modules has a cylindrical locating element.
10. The apparatus as claimed in claim 7 , wherein the locating element is fixed and held displaceably on the guide module.
11. The apparatus as claimed in claim 8 , wherein the locating element is fixed and held displaceably on the guide module.
12. The apparatus as claimed in claim 9 , wherein the locating element is fixed and held displaceably on the guide module.
13. The apparatus as claimed in claim 1 , wherein the bearing element is connected releasably and exchangeably to the guide.
14. A method for making bores in a turbine blade edge, comprising:
providing an apparatus, comprising:
a drilling device with a rotating electrode as a drilling tool; and
a guide for the drilling device,
wherein the guide includes
a bearing element, a gap being formed in the bearing element, the gap being delimited by bearing faces and having a contour corresponding to a shape of a turbine blade edge to be machined, and
at least two guide modules lying opposite one another,
wherein the guide modules together form a tension device for fixing the guide on the turbine blade, and
wherein the bearing element of the guide includes a clearance for leading through the rotating electrode;
placing the apparatus onto the turbine blade such that the turbine blade edge to be machined is arranged in a region of the gap of the bearing element,
mounting the turbine blade between the guide modules; and
making bores in the turbine blade edge by the drilling device.
15. The method as claimed in claim 14 , wherein the turbine blade is mounted with tension between the guide modules.
16. The method as claimed in claim 14 , wherein the gap in the bearing element is delimited by two bearing prisms.
17. The method as claimed in claim 14 , wherein at least a region of the guide in which the clearance is formed comprises an electrically insulating material.
18. The method as claimed in claim 14 , wherein the clearance is arranged in line with the gap.
19. The method as claimed in claim 14 , wherein at least one of the guide modules has a cylindrical locating element.
20. The method as claimed in claim 19 , wherein the locating element is fixed and held displaceably on the guide module.