Modular drill and method for using a modular drill

Patent metadata

Field	Value
Publication number	US-11839920-B2
Application number	US-202117361120-A
Country	US
Kind code	B2
Filing date	Jun 28, 2021
Priority date	Jun 28, 2021
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

A modular drill including a shank having a shank bore therein, a guide pin tip disposed in the shank bore, a cutting tip, and a connection shaft coupled to the cutting tip, the connection shaft having a connection shaft sidewall and a guide path therein for guiding the guide pin tip therethrough while the connection shaft moves through the shank bore.

First claim

What is claimed is:

1. A modular drill comprising:
a shank having a shank bore therein;
a guide pin tip disposed in the shank bore;
a cutting tip; and
a connection shaft extending in an axial direction and coupled to the cutting tip, the connection shaft having an outer surface comprising a guide path therein for guiding the guide pin tip therethrough while the connection shaft moves through the shank bore, wherein the guide path comprises an axial guide path segment and a substantially helical circumferential guide path segment, the circumferential guide path segment extending simultaneously in a circumferential direction around the outer surface and along the axial direction of the connection shaft.

2. The modular drill of claim 1 , wherein the shank includes a plurality of shank flutes.

3. The modular drill of claim 1 , wherein the cutting tip includes a plurality of cutting tip flutes.

4. The modular drill of claim 1 , wherein the shank includes a plurality of shank flanks for clamping the cutting tip therebetween.

5. The modular drill of claim 4 , wherein the plurality of shank flanks each include a flank front surface and flank back surface.

6. The modular drill of claim 1 , wherein the cutting tip includes a cutting tip shoulder surface and a cutting tip counter surface.

7. The modular drill of claim 1 , further comprising a locking pin.

8. The modular drill of claim 1 , wherein the shank includes a locking pin through hole.

9. The modular drill of claim 1 , wherein the connection shaft includes a locking pin engagement feature.

10. A method for using a modular drill of claim 1 , the method comprising:
moving a connection shaft through a shank bore of a shank, the connection shaft coupled to a cutting tip, the connection shaft having a guide path therein; and
guiding a guide pin tip, which is disposed in the shank bore, through the guide path while the connection shaft moves through the shank bore of the shank.

11. The method of claim 10 , wherein moving the connection shaft through the shank bore of the shank comprises inserting the connection shaft into the shank bore to assemble the modular drill.

12. The method of claim 10 , wherein moving the connection shaft through the shank bore of the shank comprises removing the connection shaft from the shank bore to disassemble the modular drill.

13. The method of claim 10 , wherein the step of guiding the guide pin tip includes guiding the guide pin tip along the guide path in a circumferential direction and an axial direction simultaneously.

14. The method of claim 10 , wherein the step of moving the connection shaft through the shank bore includes:
engaging a cutting tip shoulder surface of the cutting tip with a surface of a shank flank of the flank; and
elastically biasing the shank flank in a radially outward direction as the connection shaft is moved radially within the shank bore.

15. The modular drill of claim 9 , wherein the locking pin engagement feature comprises a hole formed in the connection shaft.

16. The modular drill of claim 15 , wherein the hole is formed through the connection shaft.

17. The modular drill of claim 15 , wherein the hole is oblong.

18. The modular drill of claim 17 , wherein the oblong hole is elongated in the axial direction.

19. The modular drill of claim 6 , wherein the cutting tip shoulder surface is arranged at a first radial distance from a central axis of the drill, and a portion of the flank front surface opposing the cutting tip shoulder surface is arranged at a second radial distance from the central axis of the drill, less than the first radial distance.

20. The modular drill of claim 19 , wherein as the guide pin tip is guided through the circumferential guide path, the cutting tip shoulder surface is adapted to engage with the opposing portion of the flank front surface and elastically deform the shank flank in a radially outward direction.

Assignees

• Kennametal Inc

Inventors

• Da Silva Marcelo Euripedes
• Kuhlemann Patrick
• Gey Christoph
• Schuffenhauer Michael
• Zeug Berthold Heinrich

Classifications

• B23B27/1611 Primary

  characterised by having a special shape · CPC title

• B23B35/00

  Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods · CPC title

• B23B39/00 Primary

  General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines · CPC title

• B23B51/0004 Primary

  with cutting heads or inserts attached by screw means · CPC title

• B23B47/00

  Constructional features of components specially designed for boring or drilling machines; Accessories therefor (working-spindles, bearing sleeves therefor B23Q1/70; for machine tools in general B23Q) · CPC title