Self-hammering cutting tool

Patent metadata

Field	Value
Publication number	US-11400613-B2
Application number	US-202016806799-A
Country	US
Kind code	B2
Filing date	Mar 2, 2020
Priority date	Mar 1, 2019
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

A cutting tool with a plurality of cutting elements connected to a support structure wherein a portion of the support structure is configured to flex or bend based on the rotational frequency of the cutting tool. The rotational frequency of the cutting tool is a product of the design and composition of the tool.

First claim

What is claimed is:

1. A cutting tool comprising:
a centralized shaft having a central axis with a first end and a second end wherein the first end is configured to connect to a rotational element such that the cutting tool is rotatable about the central axis at a rotational frequency;
a plurality of resiliently compliant support element connected to the centralized shaft wherein the resiliently compliant support element moves in correlation to the rotational frequency at a preferred resonance frequency, wherein each of the plurality of resiliently compliant support elements extend radially outward from the central axis such that they are elongated elements having a first portion connected to the centralized shaft and a second portion, and wherein each of the plurality of resiliently compliant support elements rest in a resting plane when not rotating and where each of the plurality of resiliently compliant support elements flex out of plane when rotating; and;
a plurality of cutting elements wherein each of the plurality of cutting elements corresponds to at least one of the plurality of resiliently compliant support elements and is connected to the second portion thereof, wherein the cutting element produces a hammering effect as a result of movement from the resiliently compliant support element.

2. The cutting tool of claim 1 , wherein each of the plurality of resiliently compliant support elements comprises a secondary flex element interconnected between at least two of the cutting elements.

3. The cutting tool of claim 2 , wherein the secondary flex element is selected from a group of shapes consisting of, “V” shaped, “U” shaped, and straight.

4. The cutting tool of claim 1 , wherein the cutting tool is manufactured from a material selected from a group consisting of steel, titanium, composite, nickel-based alloy, metal matrix composite, carbide-reinforced alloy, bulk metallic glass, amorphous metal, tungsten, niobium, vanadium, and molybdenum.

5. The cutting tool of claim 1 , wherein the elongated shaft has a bore hole that extends through the shaft running along the central axis from the first end to the second end.

6. The cutting tool of claim 1 , wherein the cutting tool is selected from a group consisting of saw blade, coring blade, rock drilling bit, and a chainsaw.

7. The cutting tool of claim 1 , wherein the resiliently compliant support element has a vibrational mode based on the geometry of the tool.

8. The cutting tool of claim 7 , wherein the vibrational mode is a traveling wave pattern.

9. The cutting tool of claim 7 , wherein the vibrational mode is an arched cross sectional pattern.

10. The cutting tool of claim 7 , wherein the vibrational mode is a traveling wave pattern.

11. The cutting tool of claim 7 , wherein the vibrational mode is a V-shaped cross sectional pattern.

12. The cutting tool of claim 7 , wherein the vibrational mode is a horizontal plane cross sectional pattern.

13. The cutting tool of claim 7 , wherein the vibrational mode is angled wave cross sectional pattern.

14. The cutting tool of claim 1 , wherein the cutting tool is a self-hammering cutting tool.

15. The cutting tool of claim 1 , wherein the cutting element is made from a metal matrix composite.

16. The cutting tool of claim 1 , further comprising a strain gage disposed on resiliently compliant support element and electronically connected to an output device wherein an applied force on the resiliently compliant support element will generate a strain or stress signal, and wherein the strain or stress signal is transmitted from the strain gage to the output device.

17. The cutting tool of claim 1 , wherein the tool is adapted to cut through a material selected from a group consisting of rock, dirt, oil, oil sands, wood, ice, metal, ice and rock, cement, and composite.

18. The cutting tool of claim 1 , wherein the tool is adapted for use in an industry selected from a group consisting of mining, oil extraction, gas extraction, ore mining, rock cutting, construction, ice cutting, and machining.

19. The cutting tool of claim 1 , wherein the cutting tool is produced using additive manufacturing.

20. The cutting tool of claim 19 , wherein the cutting tool is heat treated after manufacturing to strengthen the tool.

21. The cutting tool of claim 1 , further comprising a coating on a cutting surface of the cutting element wherein the coating provides an additional hardening element to the surface of the cutting element.

22. The cutting tool of claim 1 , further comprising an additional mass connected to a portion of the cutting element, wherein the additional mass operates to alter the preferred resonance frequency of the tool.

23. The cutting tool of claim 22 , wherein the additional mass is a carbide bit.

Assignees

• California Inst Of Techn

Inventors

• Hofmann Douglas C
• Hendry Morgan
• Firdosy Samad A
• Pate Andre M
• Yahnker Christopher R
• Sunday Cecily M

Classifications

• B23D61/028

  of special material · CPC title

• E21C25/16

  Machines slitting solely by one or more rotating saws, cutting discs, or wheels · CPC title

• B23D57/02

  with chain saws · CPC title

• B26D1/0006 Primary

  Cutting members therefor · CPC title

• B28D1/146

  Tools therefor (drill bits for earth or rock drilling E21B10/00) · CPC title