Lubricant for thread rolling and thread rolling method

Abstract

A thread rolling lubricant of a nonchlorine species, in which a lubricant base oil is blended with 25 through 35 weight % of (A) a sulfur species extreme pressure agent, 6 through 16 weight % of (B) an organic zinc compound, 2 through 12 weight % of (C) a calcium species additive, and 2 through 13 weight % of (D) an oiliness agent for carrying out thread rolling.

1 . A lubricant for thread rolling which is a nonchlorine species lubricant, the lubricant comprising:
 a lubricant base oil blended with (A) a sulfur species extreme pressure agent, (B) an organic zinc compound, (C) a calcium species additive, and (D) an oiliness agent, as additive;   wherein additive (A) is present in an amount of 25 through 35 weight %, additive (B) is present in the amount of 6 through 16 weight %, additive (C) is present in an amount of 2 through 12 weight %, and additive (D) is present in an amount of 2 through 13 weight %.   
   
   
       2 . The lubricant for thread rolling according to  claim 1  a revolution of thread rolling is equal to or higher than 400 rpm. 
   
   
       3 . The lubricant for thread rolling according to  claim 1 ,
 wherein the additive (C) is at least one of calcium sulfonate, calcium salicylate, and calcium phenate.   
   
   
       4 . The lubricant for thread rolling according to  claim 1 ,
 wherein the additive (C) is highly basic calcium sulfonate having a base number equal to or higher than 250 mgKOH/g.   
   
   
       5 . The lubricant for thread rolling according to  claim 1 ,
 wherein the additive (B) is at least one of ZnDTP and ZnDTC.   
   
   
       6 . The lubricant for thread rolling according to  claim 1 ,
 further including a rust preventative agent present in an amount of 2 weight % or smaller.   
   
   
       7 . The lubricant for thread rolling according to  claim 6 ,
 wherein the rust preventive agent is a Ba species rust preventive agent.   
   
   
       8 . The lubricant for thread rolling according to  claim 1 ,
 wherein a dynamic viscosity is 15 through 45 mm 2 /s.   
   
   
       9 . The lubricant for thread rolling according to  claim 1 ,
 wherein an object of working is low carbon steel having a carbon content equal to or smaller than 0.3 mass %.   
   
   
       10 . A lubricant for thread rolling which is a nonchlorine species lubricant, the lubricant comprising:
 a lubricant base oil blended with (A) a sulfur species extreme pressure agent, (B) an organic zinc compound, (C) a calcium species additive, and (D) an oiliness agent, as additive;   wherein additive (A) is present in an amount of 25 through 30 weight %,   additive (B) is present in the amount of 6 through 11 weight %,   additive (C) is present in an amount of 2 through 3 weight %,   and additive (D) is present in an amount of 2 through 7 weight %.   
   
   
       11 . The lubricant for thread rolling according to  claim 10   a revolution of thread rolling is equal to or higher than 400 rpm.   
   
   
       12 . The lubricant for thread rolling according to  claim 10 ,
 wherein the additive (C) is at least one of calcium sulfonate, calcium salicylate, and calcium phenate.   
   
   
       13 . The lubricant for thread rolling according to  claim 10 ,
 wherein the additive (C) is highly basic calcium sulfonate having a base number equal to or higher than 250 mgKOH/g.   
   
   
       14 . The lubricant for thread rolling according to  claim 10 ,
 wherein the additive (B) is at least one of ZnDTP and ZnDTC.   
   
   
       15 . The lubricant for thread rolling according to  claim 10 ,
 further including a rust preventative agent present in an amount of 2 weight % or smaller.   
   
   
       16 . The lubricant for thread rolling according to  claim 15 ,
 wherein the rust preventive agent is a Ba species rust preventive agent.   
   
   
       17 . The lubricant for thread rolling according to  claim 10 ,
 wherein a dynamic viscosity is 15 through 45 mm 2 /s.   
   
   
       18 . The lubricant for thread rolling according to  claim 10 ,
 wherein an object of working is low carbon steel having a carbon content equal to or smaller than 0.3 mass %.   
   
   
       19 . A thread rolling method of carrying out thread rolling by a revolution number equal to or higher than 400 rpm while supplying the lubricant according to  claim 1 . 
   
   
       20 . The thread rolling method according to  claim 19 ,
 wherein a dynamic viscosity of the lubricant for thread rolling is 15 through 45 mm 2 /s.   
   
   
       21 . A thread rolling method of carrying out thread rolling by a revolution number equal to or higher than 400 rpm while supplying the lubricant according to  claim 10 . 
   
   
       22 . The thread rolling method according to  claim 21 ,
 wherein a dynamic viscosity of the lubricant for thread rolling is 15 through 45 mm 2 /s.