Grinding coolant supplier, grinding system and grinding method

Patent metadata

Field	Value
Publication number	US-2017368662-A1
Application number	US-201715700811-A
Country	US
Kind code	A1
Filing date	Sep 11, 2017
Priority date	Mar 12, 2015
Publication date	Dec 28, 2017
Grant date	—

Abstract

A grinding coolant supplier configured to supply a grinding coolant to a grinder configured to grind an element of a machine part having a rolling element, the grinding coolant supplier including: a grinding coolant generation apparatus configured to generate a grinding coolant which is a mixture of a water-soluble stock coolant, a first reformed water of which water particles have an average particle size of not smaller than 80 nm and not greater than 150 nm, and a second reformed water of which water particles have an average particle size of not smaller than 5 nm and smaller than 80 nm; and grinding coolant supplying device configured to supply the generated grinding coolant to the grinder.

First claim

What is claimed is:

1 . A grinding coolant supplier configured to supply a grinding coolant to a grinder configured to grind an element of a machine part having a rolling element, the grinding coolant supplier comprising:
a grinding coolant generation apparatus configured to generate a grinding coolant which is a mixture of a water-soluble stock coolant, a first reformed water of which water particles have an average particle size of not smaller than 80 nm and not greater than 150 nm, and a second reformed water of which water particles have an average particle size of not smaller than 5 nm and smaller than 80 nm; and a grinding coolant supplying device configured to supply the generated grinding coolant to the grinder.

2 . The grinding coolant supplier as claimed in claim 1 , further comprising:
a mixing device configured to mix the water-soluble stock coolant, the first reformed water, and the second reformed water to obtain the grinding coolant; a stock coolant supplying device configured to supply the water-soluble stock coolant to the mixing device; a first reformed water supplying device configured to supply the first reformed water to the mixing device; and a second reformed water supplying device configured to supply to the mixing device the second reformed water obtained by reforming the first reformed water so as to have a further smaller particle size.

3 . The grinding coolant supplier as claimed in claim 2 , wherein
the first reformed water supplying device includes:
a primary filter filled with a porous ore having a chemical composition containing, in percent by weight, 73 to 77% of SiO 2 , 13 to 15% of Al 2 O 3 , 1 to 2% of CaO, 0.65 to 0.77% of MgO, and 7.3 to 9% of the other components;
a secondary filter filled with ceramic balls generated from the porous ore having the chemical composition; and a water supplying device configured to cause water to pass sequentially through the primary filter and the secondary filter, and the second reformed water supplying device includes: a filter filled with the ceramic balls supporting nano-silvers and generated from the porous ore having the chemical composition; and water supplying device configured to cause water to pass through the filter.

4 . The grinding coolant supplier as claimed in claim 1 , wherein the grinding coolant contains 2 to 5% of the stock coolant, 85 to 93% of the first reformed water, and 5 to 10% of the second reformed water.

5 . A grinding system comprising the grinding coolant supplier as claimed in claim 1 and the grinder.

6 . A method for grinding an element of a machine part having a rolling element, the method comprising:
generating a grinding coolant which is a mixture of a water-soluble stock coolant, a first reformed water of which water particles have an average particle size of not smaller than 80 nm and not greater than 150 nm, and a second reformed water of which water particles have an average particle size of not smaller than 5 nm and smaller than 80 nm; and performing grinding by use of the generated grinding coolant.

Assignees

• Ntn Toyo Bearing Co Ltd

Inventors

• Kawanishi Hiroyuki

Classifications

• B24B55/02

  Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant (cooling or lubricating during dressing operation B24B53/095; incorporated in grinding wheels B24D) · CPC title

• C02F1/30

  by irradiation · CPC title

• B24B55/03 Primary

  designed as a complete equipment for feeding or clarifying coolant · CPC title

• C02F1/004

  using large scale industrial sized filters · CPC title