Patent ID: 8113029
Filing Date: 2012-02-14
Classification: B21J

Abstract:
1. A drop forging method, comprising the steps of: providing a drop forging device having a ram and a die, a plurality of impressions being formed in the die, and a plurality of parts lying in the impressions being shaped by a hammer blow from the ram; placing a blank part into a first impression to be occupied after every hammer blow, wherein the blank part is subsequently passed through the further impressions to a final impression to be occupied; dropping the ram to provide a hammer blow to the blank part and each of the plurality of parts lying in the impressions; after every hammer blow, successively displacing each of the blank part and the plurality of parts through the further impressions and removing a part from the final impression or the last occupied impression; gripping the plurality of parts constantly during the shaping and displacing by one of a forging tong and a transport tong, wherein the forging tongs and the transport tongs are disposed outside of the die and adjacent to longitudinal side surfaces of the die, wherein distal ends of the parts to be forged project beyond the longitudinal side surfaces, and wherein the transport tongs transport the parts along the longitudinal side surfaces of the die; and wherein, for every hammer blow, the plurality of parts are accommodated in the plurality of impressions, with symmetrical distribution between occupied and unoccupied impressions in the die with regard to loading of the ram, characterized in that the same part is forged two or more times in impressions having the same form, these impressions being separate from one another and passed through one following after the other in a direction of passing through.