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Title: High speed machine for cold forging screws, rivets, and the like hardware
Claims: I claim: 1. A high speed machine for cold forging screws, rivets, and the like hardware, comprising a frame, a die-carrying head supported for step rotational movement by said frame, a punch-carrying slide caused to reciprocate to and fro said die-carrying head, means for feeding a bar stock to said die-carrying head, shears having a fixed blade and a movable blade carried by said frame in the proximity of said die-carrying head, and a bar stock shearing device including linkage means secured at one end to said punch-carrying slide and secured at the other end to said movable blade for transmitting at least part of the movement and energy of said punch-carrying slide to said movable blade and converting the reciprocating motion of said slide into a reciprocating motion of said movable blade. 2. A high speed machine according to claim 1, wherein said movable blade is rigid with a bellcrank lever the pivot axis whereof extends in the direction of said slide path and is offset with respect thereto, and wherein said bellcrank lever has a first arm carrying said movable blade and a second arm set at an angle to the first, characterized in that said linkage means comprises a wedge element, said wedge element being rigid with said slide and having a camming surface oriented in a transversal direction to the path of the slide and a block cam following element in sliding contact with said camming surface with one end, and having the other end thereof in thrusting engagement with said second arm of said bellcrank lever, said block element being accomodated for sliding movement in a direction transversal to the path of said slide, a spring having one end secured to said frame, the other end of said spring urging said second arm of said bellcrank lever against said block towards said slide. 3. A high speed machine according to claim 2, characterized in that said second arm of said bellcrank lever comprises an adjustable stop screw by means whereof said block element is thrust contacted. 4. A high speed machine according to claim 2, characterized in that said second arm of said bellcrank lever comprises an adjustable threaded link whereon said spring is active. 5. A high speed machine according to claim 2, characterized in that said linkage means further comprises a locking mechanism for locking said bellcrank lever in one of the angular and end positions thereof. 6. A high speed machine according to claim 2, characterized in that said linkage means comprises a locking mechanism for locking said bellcrank lever at an end angular position thereof, said locking mechanism comprising a lever set for rocking about a pivot having its axis substantially parallel to the plane including said bellcrank lever but away therefrom, a shaft having a lobe cam rotating about an axis extending perpendicular to the axis whereabout said die-carrying head rotates, said rocking lever having one end in contact with said rotating cam and the other end provided with means for connection thereof to said second arm of said bellcrank lever, said connecting means including an adjustment screw, the lobes of said lobe cam determining the locking time interval for said bellcrank lever. Other info: Inventors: Castiglioni, Albino (Paradiso-Lugano, CH) Application Number: 022307 Filing Date: 1979-03-20 Publication_date: 1980-12-09 Assignee: Somavis S.A. (CH) Primary Class(es): 470/141 470/153 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Gilden, Leon Assistant Examiner: Attorney: Eslinger; Lewis H. |
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