Lubricating oil composition for metal working

Abstract

A lubricating oil composition for metal working, including a base oil composed of one or more selected from mineral oils and synthetic oils and having a kinematic viscosity at 40° C. of 50 to 300 mm 2 /s, and 0.01 to 10% by mass, based on the total amount of the composition, of a glycerin derivative (A) represented by general formula (I) [wherein R 1 represents an alkyl group, alkenyl group or arylalkyl group, R 2 and R 3 each independently represent a hydrogen atom or a methyl group, A 1 O and A 2 O each independently represent an oxyalkylene group, n is 0, 1 or 2, p and q each represent the average number of added moles, and p+q is a value of 0 to 5] is used to provide a lubricating oil composition for metal working which can improve metal workability and suppress the generation of metal abrasion powder and surface damage when used in working of a metal or an alloy thereof, in particular, in deep drawing of a non-ferrous metal such as aluminum or an aluminum alloy and therefore enables the production of a product with high surface quality.

1 . A lubricating oil composition for metal working, comprising at least one base oil selected from a mineral oil and a synthetic oil, said base oil having a kinematic viscosity at 40° C. of from 50 to 300 mm 2 /s, and from 0.01 to 10% by mass, based on the total amount of the composition, of a glycerin derivative (A) represented by general formula (I): 
       
         
           
           
               
               
           
         
         wherein R 1  represents an alkyl group, alkenyl group or arylalkyl group, R 2  and R 3  each independently represent a hydrogen atom or a methyl group, A 1 O and A 2 O each independently represent an oxyalkylene group, n is 0, 1 or 2, p and q each represent the average number of added moles, and p+q is a value of from 0 to 5. 
       
     
     
         2 . The lubricating oil composition for metal working according to  claim 1 , wherein the kinematic viscosity of the base oil at 40° C. is from 80 to 260 mm 2 /s. 
     
     
         3 . The lubricating oil composition for metal working according to  claim 1 , wherein the kinematic viscosity of the base oil at 40° C. is from 120 to 200 mm 2 /s. 
     
     
         4 . The lubricating oil composition for metal working according to  claim 1 , wherein the base oil has a % C p  of from 65 to 85. 
     
     
         5 . The lubricating oil composition for metal working according to  claim 1 , wherein R 1  is an alkyl group or alkenyl group having from 12 to 24 carbon atoms, R 2  and R 3  each are a hydrogen atom, n is 1, p=0 and q=0. 
     
     
         6 . The lubricating oil composition for metal working according to  claim 1 , further comprising from 0.1 to 15% by mass of an oily agent. 
     
     
         7 . The lubricating oil composition for metal working according to  claim 1 , wherein the metal working is deep drawing of an aluminum material or aluminum alloy material. 
     
     
         8 . A method for deep drawing an aluminum material or aluminum alloy material at a drawing ratio of 1.5 or higher, said method comprising applying the lubricating oil composition for metal working of  claim 1 . 
     
     
         9 . The lubricating oil composition for metal working according to  claim 6 , wherein the oily agent is an alcohol, a fatty acid, a fatty acid ester or a mixture thereof. 
     
     
         10 . The lubricating oil composition for metal working according to  claim 1 , further comprising one or more selected from an extreme pressure agent, an antiwear agent, an antioxidant, an antirust, an anticorrosion agent, an antifoaming agent, a viscosity index improver and an antistatic agent. 
     
     
         11 . A method for deep drawing an aluminum material or aluminum alloy material at a drawing ratio of 1.7 or higher, said method comprising applying the lubricating oil composition for metal working of  claim 1 . 
     
     
         12 . The lubricating oil composition for metal working according to  claim 1 , wherein the kinematic viscosity of the lubricating oil at 40° C. is from 80 to 260 mm 2 /s. 
     
     
         13 . The lubricating oil composition for metal working according to  claim 1 , wherein the kinematic viscosity of the lubricating oil at 40° C. is from 120 to 200 mm 2 /s.