Dowel jig

Details Dowel jig Dowel jig

B - Operations, Transporting

27

C

B27C 3/06 (2006.01) B23B 47/28 (2006.01) B25B 11/02 (2006.01)

Patent

CA 2299566

A dowelling jig for preparing aligned bores in corresponding joint faces of two work pieces which are to be joined using dowels, includes a spacer plate having opposite flat sides against which the side faces of the work pieces are placed and held. First and second drill guide arms are removable secured by securing arrangements to the spacer plate and to extend away therefrom in opposite directions, each arm providing a flat surface against which a joint surface of one of the work pieces is to abut. At least one line of through-bores are provided in each of the drill guide arms for guiding a drill bit at right angles into the work piece. The thickness of each guide arm is such that each through-bore has an axial length sufficient for guiding a hand held drill to drill a work piece bore substantially at right angles to the joint surface. The line extending along the guide arm parallel to an edge which abuts the spacer plate and the line of through bores on one arm corresponding in position to a through-bores on the other arm is such that the bores align when the joint faces of the work piece are brought into abutment.

Ce gabarit possède une plaque de calage (10) contre les cotés opposés de laquelle se positionnent les faces latérales des pièces à usiner et ce, afin d'y être maintenues en place. Il est également pourvu de deux pièces guide-foret (11 12) conçues pour s'assujettir à la plaque de calage. Ces pièces partent de la plaque de calage dans deux directions opposées, constituant ainsi une surface contre laquelle vient porter une surface de joint de l'une des pièces à usiner. Dans chaque pièce guide-foret est ménagé au moins un alésage traversant qui guide l'outil de forage en le positionnant à angle droit dans la pièce à travailler. La longueur axiale de chacun de ces alésages traversant (17, 18) est suffisante pour guider un foret à main perçant un alésage dans la pièce à usiner perpendiculairement à la surface de joint. Un alésage traversant d'une pièce guide-foret correspond par sa position à un alésage traversant de l'autre pièce guide-foret et, de ce fait, ces alésages se trouvent dans un même alignement lorsque les surfaces de joint de la pièce à usiner viennent appuyer l'une contre l'autre.

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