B - Operations – Transporting – 23 – D
Patent
B - Operations, Transporting
23
D
B23D 61/02 (2006.01) B23D 61/12 (2006.01)
Patent
CA 2267231
An improved circular saw blade having first and second planar surfaces is provided which has a plurality of dimples which formed one or both of such surfaces of the blade. The dimples each have a perimeter and include a circumferential ridge which extends above the surfaces of the body of the blade. When a side load is applied to the work piece, the ridges contact one of the walls defining the kerf being cut that is forced by the load against the blade, so that the surface of the body of the blade is spaced from the wall. The dimples are preferably formed by cold working the blade, which stiffens the blade, and reducing the vibration of the blade during the cutting procedure. The dimples and their ridges also provide greater heat dissipation, and tend to provide a laminar flow of air over the surface of the blade, acting much as the dimples of a golf ball.
Lame améliorée (1) de scie circulaire possédant une pluralité d'échancrures (13) pratiquées par formage à froid sur le corps de ladite lame. Ces échancrures (13) présentent chacune une arête périphérique (15) s'étendant au-dessus des surfaces (3, 5) du corps de la lame. Quand on exerce une charge latérale sur une pièce, les arêtes (15) viennent en contact avec l'une des parois définissant le trait de scie exercé par la lame sur laquelle porte la charge, de façon à éloigner de la paroi la surface du corps de la lame. On obtient les échancrures (13) par formage à froid de la lame (1), ce qui rigidifie cette dernière et limite ses vibrations pendant la coupe. Les échancrures (13) et leurs arêtes (15) produisent également une dissipation de chaleur plus importante et tendent à faire passer un écoulement laminaire d'air au-dessus de la surface de la lame, ce qui exerce un effet pratiquement semblable à celui d'une balle de golf.
Phillips Gregory A.
Ward Kevin M.
Borden Ladner Gervais Llp
Vermont American Corporation
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