Saw blade having thin film ceramic coating

Patent metadata

Field	Value
Publication number	US-2023311222-A1
Application number	US-202017051222-A
Country	US
Kind code	A1
Filing date	Jul 20, 2020
Priority date	Jul 19, 2019
Publication date	Oct 5, 2023
Grant date	—

Abstract

A saw blade including a body and a plurality of teeth disposed on the body and defining a cutting portion. At least one tooth of the plurality of teeth have a substrate forming a tip of the at least one tooth. The saw blade further includes a thin film ceramic coating overlaying at least the substrate. The thin film ceramic coating has a greater strength than the substrate.

First claim

1 . A saw blade comprising:
a body; a plurality of teeth disposed on the body and defining a cutting portion, at least one tooth of the plurality of teeth including a substrate forming a tip of the at least one tooth; and a thin film ceramic coating overlaying at least the substrate; wherein the thin film ceramic coating has a greater strength than the substrate.

2 . The saw blade of claim 1 , wherein the body and the plurality of teeth form a single monolithic component.

3 . The saw blade of claim 1 , wherein the substrate is received by a pocket provided on the at least one tooth.

4 . The saw blade of claim 1 , wherein the thin film ceramic coating also overlays the body.

5 . The saw blade of claim 1 , wherein the thin film ceramic coating also overlays the plurality of teeth.

6 . The saw blade of claim 1 , wherein each of the plurality of teeth include the substrate.

7 . The saw blade of claim 6 , wherein the thin film ceramic coating overlays the substrate on each of the plurality of teeth.

8 . The saw blade of claim 1 , wherein the thin film ceramic coating is applied to the substrate via physical vapor deposition.

9 . The saw blade of claim 1 , wherein the thin film ceramic coating has a thickness between approximately 3.0 micrometers and approximately 4.0 micrometers.

10 . The saw blade of claim 9 , wherein the thin film ceramic coating has a thickness of approximately 3.5 micrometers.

11 . The saw blade of claim 1 , wherein the thin film ceramic coating is composed of one selected from a group consisting of aluminum titanium nitride, aluminum chromium nitride, aluminum titanium chromium nitride, and titanium molybdenum nitride.

12 . The saw blade of claim 1 , wherein the thin film ceramic coating increases heat dissipation during a cutting operation.

13 . The saw blade of claim 1 , wherein the substrate is a separate component that is secured onto the at least one tooth via welding.

14 . The saw blade of claim 1 , wherein the substrate is composed of one selected from a group consisting of H6F grade carbide having a sub-micron grain size, H10F grade carbide having a sub-micron grain size, and H15F grade carbide having a sub-micron grain size.

15 . The saw blade of claim 1 , wherein the substrate includes carbide, and wherein the thin film ceramic coating is composed of an aluminum-based material.

16 . A saw blade comprising:
a body having an edge; a cutting portion coupled to the body and including a plurality of teeth extending along the edge, each tooth having a rake face, a relief face, a gullet, and a lip; a plurality of substrates, each substrate coupled to the lip of one of the plurality of teeth to form a tip of the one of the plurality of teeth; and a thin film ceramic coating overlaying a portion of the cutting portion, such that at least the rake face, the relief face, the gullet, the lip, and the substrate of each tooth are covered by the thin film ceramic coating, wherein the thin film ceramic coating has a greater strength than the substrate, wherein the substrate is composed of tungsten carbide alloy having a sub-micron grain size, wherein the thin film ceramic coating has a thickness between approximately 3.0 micrometers and approximately 4.0 micrometers.

17 . The saw blade of claim 16 , wherein the thin film ceramic coating overlays the body in its entirety.

18 . The saw blade of claim 16 , wherein the substrate is a separate component that is secured onto each tooth via welding.

19 . The saw blade of claim 16 , wherein the thin film ceramic coating is composed of one selected from a group consisting of aluminum titanium nitride, aluminum chromium nitride, aluminum titanium chromium nitride, and titanium molybdenum nitride.

20 . A method for manufacturing a saw blade, comprising:
forming the saw blade having a body and a plurality of teeth disposed on the body; securing a substrate to at least one of the plurality of teeth, the substrate forming a tip of the at least one of the plurality of teeth; and applying a thin film ceramic coating over at least the substrate, wherein the thin film ceramic coating has a greater strength than the substrate.

21 . The method of claim 20 , further comprising welding the substrate to the at least one of the plurality of teeth.

22 . The method of claim 20 , further comprising edge prepping the substrate.

23 . The method of claim 20 , wherein applying the thin film ceramic coating includes applying the thin film ceramic coating via physical vapor deposition.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Dietz Carl
• Marich Milorad
• Gilbert Chris

Classifications

• B23D61/127 Primary

  of special material · CPC title

• B23D61/14 Primary

  with inserted saw teeth {, i.e. the teeth being individually inserted} · CPC title

• B23D61/125

  Composite body, e.g. laminated · CPC title

• C23C14/0641

  Nitrides (C23C14/0617 takes precedence) · CPC title

• C23C14/24

  Vacuum evaporation · CPC title