Abstract: A method of head trimming a fastener blank in a cold-forging process comprises placing a fastener blank into a bore of a punch having an end face; supporting an underside of a head portion of the fastener blank with the punch end face; moving a die having an internal passage and a trim plate with a cutting edge toward the fastener blank; shearing the head of the fastener blank with the cutting edge of the trim plate; stopping movement of the die at an extended trim position where the cutting edge lies beyond an underside of the head portion of the fastener blank; ejecting the fastener blank from the punch bore and through the die passage to an opposite side of the die; retracting the die; and removing a scrap ring from around the punch by a stripper sleeve.

Abstract: A forging machine includes a machine bed, a driving unit driven by a driving source to activate a feeding unit, a sliding seat unit, and a forging unit. The machine bed includes left and right sidewalls. The driving unit is disposed at an inner side of the left sidewall. The sliding seat unit is disposed at an outer side of the right sidewalls, and includes a sliding plate unit that can reciprocate forwardly and rearwardly to activate a cutting unit and a holding unit. The sliding plate unit is guided by a guiding roller mechanism such that the sliding plate unit moves smoothly.

Abstract: In a process for forming a bolt, a die, a rod-shaped knock-out member, and a punch are prepared. The die has opposite end surfaces, a through bore opened to one of the opposite end surfaces, and a space connected with the through bore and disposed substantially perpendicular to an axial line of the through bore. The knock-out member is disposed in the through bore. The punch is disposed so as to face one of the opposite end surfaces of the die to which the through bore is opened. A bolt precursor is fitted into the through bore of the die at the leg member, and is pressed by the punch at the head member. The leading end of the leg member is pressed by the knock-out member, and accordingly an excess material of the bolt precursor at around the leading end of the leg member, or an excess material thereof adjacent to the leading end of the leg member is deformed and flowed into the space of the die as a thinned-out portion. Thus, the bolt precursor can be flattened at the leading-end surface of the leg member.