Lubricant material for assisting machining process and machining method

Patent metadata

Field	Value
Publication number	US-2018229339-A1
Application number	US-201615750431-A
Country	US
Kind code	A1
Filing date	Aug 4, 2016
Priority date	Aug 6, 2015
Publication date	Aug 16, 2018
Grant date	—

Abstract

The present invention provides a lubricant material for assisting machining process comprising a high molecular weight compound (A) having a weight average molecular weight of 5×10 4 or higher and 1×10 6 or lower, a medium molecular weight compound (B) having a weight average molecular weight of 1×10 3 or higher and lower than 5×10 4 , and a carbon (C) having an average particle size of 100 μm or larger.

First claim

1 . A lubricant material for assisting machining process comprising:
a high molecular weight compound (A) having a weight average molecular weight of 5×10 4 or higher and 1×10 6 or lower; a medium molecular weight compound (B) having a weight average molecular weight of 1×10 3 or higher and lower than 5×10 4 ; and a carbon (C) having an average particle size of 100 μm or larger.

2 . The lubricant material for assisting machining process according to claim 1 , wherein
the lubricant material for assisting machining process is used in a machining method comprising a machining step of machining a workpiece material with a machining tool while bringing the lubricant material for assisting machining process into contact with the machining tool and/or the to-be-processed portion of the workpiece material.

3 . The lubricant material for assisting machining process according to claim 1 , wherein
a shape of the carbon (C) is a flake shape.

4 . The lubricant material for assisting machining process according to claim 1 , wherein
the high molecular weight compound (A) is a thermoplastic resin having a weight average molecular weight of 5×10 4 or higher and 1×10 6 or lower, and the medium molecular weight compound (B) is a thermoplastic resin having a weight average molecular weight of 1×10 3 or higher and 2×10 4 or lower.

5 . The lubricant material for assisting machining process according to claim 1 , wherein
the high molecular weight compound (A) comprises a water soluble thermoplastic resin and/or a non-water soluble thermoplastic resin, wherein the water soluble thermoplastic resin is one or more resins selected from the group consisting of a polyalkylene oxide compound, a polyalkylene glycol compound, an ester compound of polyalkylene glycol, an ether compound of polyalkylene glycol, a monostearate compound of polyalkylene glycol, a water soluble urethane, a water soluble polyether resin, a water soluble polyester, sodium poly(meth)acrylate, polyacrylamide, polyvinylpyrrolidone, polyvinyl alcohol, saccharides, and modified polyamide, and the non-water soluble thermoplastic resin is one or more resins selected from the group consisting of a urethane polymer, an acrylic polymer, a vinyl acetate polymer, a vinyl chloride polymer, a polyester polymer, a polystyrene resin, and a copolymer thereof.

6 . The lubricant material for assisting machining process according to claim 1 , wherein
the medium molecular weight compound (B) is one or more compounds selected from the group consisting of a polyalkylene glycol compound, a monoether compound of polyalkylene oxide, a monostearate compound of polyalkylene oxide, and a polyalkylene oxide compound.

7 . The lubricant material for assisting machining process according to claim 1 , wherein
a content of the high molecular weight compound (A) is 20 to 60 parts by mass with respect to 100 parts by mass in total of the high molecular weight compound (A), the medium molecular weight compound (B), and the carbon (C), a content of the medium molecular weight compound (B) is 10 to 75 parts by mass with respect to 100 parts by mass in total of the high molecular weight compound (A), the medium molecular weight compound (B), and the carbon (C), and a content of the carbon (C) is 5 to 70 parts by mass with respect to 100 parts by mass in total of the high molecular weight compound (A), the medium molecular weight compound (B), and the carbon (C).

8 . The lubricant material for assisting machining process according to claim 1 , wherein
the lubricant material for assisting machining process has a sheet shape having a thickness of 0.1 mm or larger and 20 mm or smaller.

9 . The lubricant material for assisting machining process according to claim 1 , wherein
a flexible volume is 5 mm or larger.

10 . The lubricant material for assisting machining process according to claim 1 , further comprising
an adhesive layer on a face to be brought into contact with the workpiece material.

11 . The lubricant material for assisting machining process according to claim 10 , wherein
the adhesive layer comprises an acrylic polymer.

12 . The lubricant material for assisting machining process according to claim 1 , wherein
when the lubricant material for assisting machining process is removed from the workpiece material after machining the workpiece material, a total amount of components of the lubricant material for assisting machining process and the adhesive layer attached to the workpiece material is 1.0×10 −8 g or smaller per mm 2 of a total of the area of a contact portion between the workpiece material and the lubricant material for assisting machining process and the area of the machined portion.

13 . A machining method comprising a machining step of forming a machined portion by machining a workpiece material with a machining tool while bringing a lubricant material for assisting machining process according to claim 1 into contact with the machining tool and/or the to-be-processed portion of the workpiece material, wherein
the workpiece material comprises a fiber reinforced composite material, a difficult-to-machining metal material, or a composite material of the fiber reinforced composite material and the difficult-to-machining metal material.

14 . The machining method according to claim 13 , wherein
the machining step is a step of forming a machined portion having an exit and an entrance of the machining tool, and the machining method comprises, before the machining step, a close contact step of closely bringing in advance the lubricant material for assisting machining process into contact with a portion to be an exit and/or a portion to be an entry of the machining tool, in the workpiece material.

15 . The machining method according to claim 14 , wherein
in the close contact step, the lubricant material for assisting machining process is closely brought in advance into contact with a portion to be the exit of the machining tool, in the workpiece material.

16 . The machining method according to claim 14 , wherein
in the close contact step, the lubricant material for assisting machining process is closely brought in advance into contact with a portion to be the entry of the machining tool, in the workpiece material.

17 . The machining method according to claim 13 , wherein
the machining method comprises, before the machining step, a contact step of bringing in advance the lubricant material for assisting machining process into contact with the machining tool.

18 . The machining method according to claim 13 , wherein
in the machining step, the machined portion is formed by machining the workpiece material closely brought into contact with the lubricant material for assisting machining process in a state where another lubricant material for assisting machining process is brought into contact with the machining tool.

19 . The machining method according to claim 13 , wherein
a thickness of the workpiece material is 10 mm or larger.

20 . The machining method according to claim 13 , wherein
in the machining step, a hole is opened by drilling work using a drill as the machining tool.

21 . The machining method according to claim 20 , wherein
a diameter of the hole is 10 mm or larger.

22 . The machining method according to claim 13 , wherein
a fiber reinforced composite material is a carbon fiber reinforced plastic.

23 . The machining method according to claim 13

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Matsuyama Yousuke
• Ogashiwa Takaaki

Classifications

• C10M107/00

  Lubricating compositions characterised by the base-material being a macromolecular compound · CPC title

• C09J7/20

  characterised by their carriers · CPC title

• C10M107/36

  Polysaccharides, e.g. cellulose · CPC title

• B23Q11/10

  Arrangements for cooling or lubricating tools or work · CPC title

• C10M107/44

  Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title