# US 9,518,871 B2 · Method of measuring temperature in cutting process

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- Number: US 9,518,871 B2
- Document ID: US9518871B2
- Status: Granted
- Kind: B2
- Application number: 13/754,490
- Filed: 2013-01-30
- Published: 2013-08-01
- Granted: 2016-12-13
- Earliest claimed: 2012-01-31
- Assignees: Toshiba Kikai Kabushiki Kaisha
- Applicants: Toshiba Kikai Kabushiki Kaisha
- Inventors: Masahiko Fukuta
- Web page: https://patentgrep.com/patent/US9518871B2

## CPC

- G01K 7/02: using thermoelectric elements, e.g. thermocouples
- G01K: MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J5/00)

## Abstract

The invention relates to a method of measuring a cutting temperature for an apparatus for a cutting process, when the apparatus for a cutting process includes a shank and a tool jointed to the shank by means of silver solder, the shank being electrically conductive, the tool being electrically nonconductive. The method includes: connecting a first lead wire to the shank, connecting a second lead wire to the silver solder, and measuring thermal electromotive force that is generated between the first lead wire and the second lead wire.

## Claims

### Claim 1

A method of measuring a cutting temperature for an apparatus for a cutting process, the apparatus for a cutting process including a shank and a tool jointed to the shank by means of silver solder, the shank being electrically conductive, the tool being electrically nonconductive, and the tool being configured to cut a work while the tool is jointed to the shank, the method comprising
directly connecting a first lead wire to the shank,
directly connecting a second lead wire to the silver solder, and
measuring thermal electromotive force that is generated between the first lead wire and the second lead wire, wherein
the measured thermal electromotive force provides an indication of the cutting temperature.

### Claim 2 (depends on 1)

The method of measuring a cutting temperature according to claim 1, wherein the tool being electrically nonconductive is a tool made of single crystal diamond.

### Claim 3 (depends on 1)

The method of measuring a cutting temperature according to claim 1, further comprising, the shank is made of cemented carbide.

### Claim 4

A method of measuring a cutting temperature for an apparatus for a cutting process, the apparatus for a cutting process including a shank and a tool jointed to the shank by means of silver solder, the tool being electrically nonconductive, and the tool being configured to cut a work while the tool is jointed to the shank, the method comprising
directly connecting a first lead wire and a second lead wire to the silver solder, respectively, and
measuring thermal electromotive force that is generated between the first lead wire and the second lead wire, wherein
the measured thermal electromotive force provides an indication of the cutting temperature.

### Claim 5

An apparatus for a cutting process comprising
a shank that is electrically conductive,
a tool that is jointed to the shank by means of silver solder and is electrically nonconductive, and the tool being configured to cut a work while the tool is jointed to the shank,
a first lead wire directly connected to the shank,
a second lead wire directly connected to the silver solder, and
a voltage measuring unit connected to the first lead wire and the second lead wire, so as and configured to measure thermal electromotive force that is generated between the first lead wire and the second lead wire, wherein
the measured thermal electromotive force provides an indication of the cutting temperature.

### Claim 6 (depends on 5)

The apparatus for a cutting process according to claim 5, further comprising a temperature-calculating unit configured to calculate a cutting temperature correspondingly based on the measured thermal electromotive force by using a preformulated conversion expression.

### Claim 7 (depends on 5)

The apparatus for a cutting process according to claim 5, wherein the tool being electrically nonconductive is a tool made of comprises a single crystal diamond.

### Claim 8 (depends on 5)

The apparatus for a cutting process according to claim 5, wherein the shank is made of cemented carbide.

### Claim 9

An apparatus for a cutting process comprising
a shank,
a tool that is jointed to the shank by means of silver solder and is electrically nonconductive, and the tool being configured to cut a work while the tool is jointed to the shank,
a first lead wire and a second lead wire directly connected to the silver solder, respectively, and
a voltage measuring unit connected to the first lead wire and the second lead wire, so as and configured to measure thermal electromotive force that is generated between the first lead wire and the second lead wire, wherein
the measured thermal electromotive force provides an indication of the cutting temperature.