Assembly for applying lubricant to the working area of a punching device

摘要

Device for applying lubricant to the workpiece and/or working surface of the punch of a multistage forging press. Channels are provided between the stepped holding pin of the punch and the wall of the stepped bore in which the holding pin reciprocates. The channels are connected via the interior of the punch to an external lubricant reservoir. The space formed with each stroke of the punch between the shoulders of the holding pin and its stepped bore acts as a pumping space. Each punch stroke causes lubricant to be drawn from the reservoir into the pumping space and subsequently forced out through the channels. Means are also provided by which the supply of lubricant from the reservoir can be more closely regulated in time with the working stroke of the press.