Embedded electronic circuit in grinding wheels and methods of embedding

Patent metadata

Field	Value
Publication number	US-11229987-B2
Application number	US-201917250673-A
Country	US
Kind code	B2
Filing date	Aug 15, 2019
Priority date	Aug 27, 2018
Publication date	Jan 25, 2022
Grant date	Jan 25, 2022

Abstract

A bonded abrasive wheel is disclosed comprising a plurality of abrasive particles disposed in a binder, a first grinding surface, a second surface opposing the first grinding surface, and an outer circumference. The wheel comprises a rotational axis extending through a central hub and a circuit configured as a Radio Frequency Identification (RFID) unit coupled to the abrasive wheel. The circuit comprises an antenna configured to communicate with one or more external devices and comprising a first end and a second end, wherein antenna has a radius of curvature about an axis along at least a portion thereof such that the first end is disposed adjacent to but is spaced from the second end, and an integrated circuit (IC) operably coupled to the antenna and configured to store at least a first data.

First claim

What is claimed is:

1. A bonded abrasive wheel comprising:
a plurality of abrasive particles disposed in a binder;
a first grinding surface;
an outer circumference;
a rotational axis extending through a central hub; and
a circuit configured for communication coupled to the bonded abrasive wheel, wherein the circuit comprises:
a ring-shaped antenna with a radius of curvature embedded within the bonded abrasive wheel, the antenna comprising a mesh having a plurality of openings, each of the plurality of openings being defined between a plurality of strands of the mesh, and wherein, in cross-section, a total area of all of the plurality of openings is between 5 times and 20 times smaller than a central opening defined by the antenna having the radius of curvature; and
an integrated circuit (IC) operably coupled to the antenna.

2. The abrasive wheel of claim 1 , wherein the integrated circuit is encapsulated within a material having a modulus of greater than 0.25 MPa but less than 125 GPa.

3. The abrasive wheel claim 1 , wherein the antenna comprises a single non-complete loop between a first end and a second end, and wherein both the antenna and the IC are positioned within the abrasive wheel so as to be spaced from the first grinding surface.

4. The abrasive wheel of claim 1 , wherein the central hub is configured to receive a bushing, and wherein the bushing comprises one of:
a non-metallic material; or the antenna.

Assignees

• 3M Innovative Properties Co

Inventors

• Eckel Joseph B
• Gabriel Nicholas T
• Mahajan Ankit
• Pekurovsky Mikhail L
• Meyers Kara A
• Metzler Thomas J
• Shah Saagar A

Classifications

• B24B49/10

  involving electrical means (B24B49/02, B24B49/08 take precedence) · CPC title

• B24D3/001

  the constituent being used as supporting member · CPC title

• B24D18/0009 Primary

  using moulds or presses · CPC title

• B24D18/0054

  by impressing abrasive powder in a matrix · CPC title

• B24D7/04

  with reinforcing means · CPC title