Method for coating cutting tool teeth

Abstract

A method of manufacturing a saw blade includes the steps of providing at least one tooth in a holder, wherein at least one surface of the tooth is coated and at least one surface of the tooth is exposed; coating the coated surface; and bonding the tooth to a blade support on the uncoated surface after the coating step.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is The application is International Application No. PCT / US2020 / 055224, entitled "Method for Coating Teeth of Cutting Tools," filed in the United States on October 12, 2020; This application claims priority to and benefit of U.S. Provisional Patent Application No. 62 / 913,699, filed October 10, 2019, the contents of which are incorporated herein by reference in their entirety. [Background technology]

[0002] This application relates generally to cutting tools. One type of cutting tool is a saw blade. There are many types of saw blades, including circular saw blades, reciprocating saw blades, and band saw blades, among others.

[0003] There are several manufacturing or treatment processes that can be applied to these blades. For example, the blades may be heat treated and / or coated. These treatments can change several properties of the blade, such as wear resistance, ductility, hardness, and shape, among others. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application more particularly relates to a method for coating the teeth of cutting tools and the tools obtained thereby. [Means for solving the problem]

[0005] A method of manufacturing a saw blade includes the steps of providing at least one tooth in a holder, wherein at least one surface of the tooth is coated and at least one surface of the tooth is exposed; coating the coated surface; and bonding the tooth to a blade support on the uncoated surface after the coating step.

[0006] The resulting saw blade may include teeth having coated and uncoated sides.

[0007] Various aspects will become apparent to those skilled in the art from the following detailed description and the accompanying drawings. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of a tooth tip having a coated surface. DETAILED DESCRIPTION OF THE INVENTION

[0009] 1. Cutting tooth 110 includes a top surface 115. In the illustrated embodiment, top surface 115 is formed as a clearance surface. Tooth 110 includes a back surface 120 and a bottom surface 125. In the illustrated embodiment, back surface 120 and bottom surface 125 are prepared for bonding to a blade support (not shown), where one or both of back surface 120 and / or bottom surface 125 are bonded to the blade support by, for example, welding, brazing, bonding, or other suitable process. Tooth 110 also includes a plurality of side surfaces 130 (one surface is shown).

[0010] The cutting tooth 110 includes a front surface 132. In the illustrated embodiment, the front surface 132 is formed as a rake face and includes a coating 135 having a bond layer 140, a heat-resistant layer 145, and a tool wear layer 150, although not all such layers are required.

[0011] In a method of manufacturing a saw blade, at least one tooth 110 is provided in a holder (not shown) with at least one face of the tooth coated and at least one face of the tooth exposed. In an exemplary method, the tooth 110 is placed in a pocket in the holder with the top face 115, back face 120, bottom face 125, and side face 130 covered and the front face 132 exposed for coating.

[0012] During the preferred coating process, bond layer 140 is placed on front surface 132 , then heat resistant layer 145 is placed on bond layer 140 , and then tool wear layer 150 is placed on heat resistant layer 145 .

[0013] While the above is preferred, it should be understood that the exposed surface(s) to be coated may be the front surface 132 or other surface(s) as desired, and that any surface(s) may be covered during the coating process with any number and type of layers as desired.

[0014] Thus, in at least one embodiment, the coating process results in a multi-layer coating on at least one surface of the cutting tooth.

[0015] The coating process can utilize high temperature coating processes such as chemical vapor deposition (CVD), physical vapor deposition (PVD), diamond or diamond-like coating processes.

[0016] After the coating process, the teeth 110 may be bonded to a blade support.

[0017] The method may include brazing, welding, or bonding an uncoated surface, such as back surface 120 or bottom surface 125, to a blade support. The blade support may have a set of teeth formed therein to mate with back surface 120 and / or bottom surface 125.

[0018] Thus, some tooth surfaces may be coated before the teeth are bonded to the blade support, while other tooth surfaces may be brazed, welded, or bonded to the blade support after the coating process.

[0019] The method may further include polishing the coated or uncoated surface before or after bonding the tooth to the blade support.

[0020] While the principles and modes of operation have been described and illustrated with reference to particular embodiments, it should be understood, however, that this can be practiced otherwise than as specifically described and illustrated without departing from the spirit or scope thereof.

Claims

1. 1. A method of manufacturing a saw blade, comprising: providing at least one tooth in a pocket in a holder, the at least one tooth having a top surface, a bottom surface, a back surface, a front surface, and at least one side surface, the front surface being a rake surface of the at least one tooth, the at least one tooth being provided in the pocket in the holder such that the top surface, the bottom surface, the back surface, and the at least one side surface of the at least one tooth are coated, and the front surface of the tooth is exposed; coating the front surface while the front surface is exposed and the at least one tooth is disposed within the pocket in the holder; after the coating step, bonding the at least one tooth to a blade support; The coating step includes: a first coating step of coating the front surface with a bonding layer and leaving the top surface, the bottom surface, the back surface, and the at least one side surface uncoated with the bonding layer; a second coating step of coating a heat resistant layer only on the bonding layer and leaving all of the top surface, the bottom surface, the back surface, and the at least one side surface uncoated with the heat resistant layer; a third coating step of coating a tool wear layer only on the heat-resistant layer and leaving all of the top surface, the bottom surface, the back surface, and the at least one side surface uncoated with the tool wear layer; The tooth side is disposed within the pocket. method.

2. 2. The method of claim 1, wherein said joining step is further defined as brazing said back surface to said blade support.

3. 2. The method of claim 1, wherein said joining step is further defined as welding said back surface to said blade support.

4. 2. The method of claim 1, wherein said joining step is further defined as bonding said back surface to said blade support.

5. 10. The method of claim 1, further comprising the step of polishing the back surface before the bonding step.

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