Woodworker's Journal 1994-18-5, страница 23

Meisel Hardware Specialties P.O. Box 70 J9 Mound, MN 55364-0070

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Gluing Up. continuedJrom page 21

Once seated, well-fitted dovetails will usually hold their position.

For wider dovetailed carcases, which require speedy assembly ksi the glue set up before I have a chance 10 clamp. 1 cut □ complete row of slightly undersized tails in thin plywood. In some cases, clamping this piece between a heavy, sprung bearer and the carcase side

will pull all the tails home (Figure 4b). If some tails still need individual attention, I clamp the row of plywood tails in place and move quickly along it with a pipe clamp. If you cut two sets of plywood tails, you can do both sides of an assembly at once.

Organizing and planning arc crucial when gluing up a carcase. Don't be tempted to omit a dry run. even on the simplest of assemblies. For complex jobs, the order in which you assemble the parts

is often critical. Decide whether it makes sense to clamp parts of the assembly as you go. Consider whether il would be prudent to use a glue that offers a lengthy open time. Before spreading any glue, make sure you have the right clamps, enough bearers, and an

Fig. 4t> SEATING CARCASE

Mate acrap ptynood bearer to match full row of dtvefcaite, tten damp between carcase and sprung bearer

Sprung beaner

Fig. 4a SEATING CARCASE DOVETAILS' (ALTERNATE METHOD)

W-tMck pfynooJcut sti^htty smaller than talis

Fig. 5 CORRECTING AN

OUT-OF-SQUARE CARCASE

assistant if the occasion calls for one.

At this point, you should also consider prefinishing the interior surfaces of your carcase. You'll have a much easier time sanding and applying finish to pieces unencumbered by hard-to-reach corners and narrow openings. In addition, glue squeeze-out is easier to remove from finished surfaces. whether you wipe it off with a damp rag or wait until the glue has congealed— but not set—and pare it off with a sharp chiscl.

Once you've glued, assembled, and clamped the carcase, check for square by measuring the diagonals on both the front and back. If all four measurements are equal, the carcase is square. If not, you can usually correct it by repositioning the clamps to pull the wide pair of opposite corners closer together. To do this, raise the clamp jaws slightly on the corners that need to be drawn together (Figure 5 >. You'll need to offset all the jaws on a corner the same amount to avoid twisting the carcase. However, you don't necessarily have to raise the jaws on both opposite corners the same distance. It usually requires some fiddling around to work a carcase hack into squareness. EJi

Carcase

Raise clamp Jews on the Mde comers offset all clamps on a comer ty tfie same amount to fl^oid twstmg carcase. (NOTE: Offset is

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Woodworker's Journal

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Septembcr/Ociober 1994 23

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