A method of making a mandrel for blind rivets

B - Operations – Transporting – 23 – Q

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B23Q 3/14 (2006.01) B21C 45/00 (2006.01) B21F 5/00 (2006.01) B21G 3/12 (2006.01) B21K 1/60 (2006.01)

Patent

CA 2129192

A metal rod (20) having a conical or pyramidal cut extremity (20a) is used to make a mandrel for blind rivets. The rod is held in place between a pair of die segments (11) such that its end (26) of a preset length including the extremity is swageable and protrudes from an upper surface (14) of the segments. Subsequently, the swageable end (26) is axially compressed to form a mandrel head (27) by a punch (12) which has a lower face (17) in parallel with the upper surface (14) of the segments and a conical or pyramidal recess (18) fittable on the extremity. Thus, a free intermediate portion of the swageable end (26) compressed by the punch (12) swells radially to form the head (27) having a flat flange (31) from which the extremity protrudes as a lug (32) upwardly and centrally. The mandrel, which has the head formed uniform without any eccentricity about the axis of a mandrel body, can now be produced inexpensively using the nail manufacturing apparatus, as in the prior art method.

Tige de métal (20) à pointe (20a) conique ou pyramidale destinée à servir de mandrin pour la pose de rivets aveugles. La tige est placée entre les deux segments d'une matrice (11) de manière qu'un bout (26) de longueur déterminée, y compris la pointe, dépasse la face supérieure (14) de la matrice. Ce bout (26) est ensuite soumis à l'action d'un poinçon (12) dont la face inférieure (17) est parallèle à la face supérieure (14) de la matrice et présente une cavité (18) conique ou pyramidale correspondant à la pointe de la tige. Ainsi, la partie saillante de la tige (26) sous la pointe, comprimée axialement par le poinçon (12), s'étend radialement et forme une tête (27) à pourtour plat (31), au centre de laquelle émerge la pointe. Ce mandrin à tête uniforme et centrée autour de l'axe du corps peut être produit à peu de frais au moyen d'un procédé connu de fabrication de clous.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

A method of making a mandrel for blind rivets does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with A method of making a mandrel for blind rivets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A method of making a mandrel for blind rivets will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-2033102

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.