FILM LUBRICATION TREATMENT FOR FORGING AND FORGING DEVICE HAVING FILM LUBRICATION TREATING MEANS

摘要

PURPOSE:To obtain a good lubrication effect at the time of forging and to allow the working of even a hard-to-work material by exposing the surface to be worked of steel products into a prescribed space which is approximately hermetically sealed, and feeding a granular lubricant electrified with a DC high voltage into the prescribed space while keeping the steel products grounded. CONSTITUTION:The inlet of the central hole 21a of a cylindrical body 21 is closed by a pushing punch 25 when slag 7 is sent into the inlet part of the central hole 21 a by the pushing punch 25. The slag 7 is eventually held in the grounded state via slag retaining members 35, 36 in the film lubrication treating space 27 which is approximately hermetically sealed. The powder lubricant A which is delivered from a lubricant housing pump 40 by a feed pump 51 and is electrified with the high voltage by passing an electrifying section 45 is blown via lubricant blowing passages 31, 32 into the film lubrication treating space 27 and is adsorbed to the respective end faces 7a, 7b of the slag 7 by the Coulomb force based on the potential difference form the slag 7. The lubricating films are formed as layers of a uniform thickness on the end faces 7a, 7b.