79 - Slant Front Tool Cart, страница 17
Angled Clamping Block Attaching hardwood edging to a sets up, you can move on to the plywood panel is always a little tricky. The problem is keeping the edging in place long enough for the glue to dry — especially on angled parts like the slant-front tool cart shown on page 18. I've tried a variety of techniques for holding the edging in place — from masking tape to wedges and C-clamps. The problem is they just don't provide enough pressure for a tight, even joint line. One Piece at a Time. To solve this problem, I've come up with a different technique. Instead of trying to glue all the edging on at once, I like to glue one piece on at a time with bar clamps. Although it takes longer, you avoid a tangle of clamps or having the edging slip out of place. Then once the glue next piece, cutting it to fit, and concentrating on getting a tight joint line with the plywood. Clamping Block. When attaching the edging to the angled corner of the tool cart, I needed a way to hold the clamps square to the edging without slipping. To do this, I made a clamping block (drawing at right). The block is a sandwich made up of three layers of plywood. A pair of angled notches in the top of the block hold clamps heads at the correct angle (photo below). The middle layer is cut from a leftover from the sides and is a bit narrower than the outer layers. This allows the block to slip over the plywood panel like a saddle and stay firmly in place. After cutting and assembling the block, I cut the notches on the band saw, keeping the notches square to the angled edge of the plywood panel. Attaching the Block. To glue the edging on, start by slipping the clamping block over the opposite edge of the panel and clamping it in place (photo below). Then, fit and glue She edging to the face and slip the clamp heads in tire block and tighten I hem up. WORKPIECE NOTE: GLUE UP MIDDLE BLANK (31/£"-WlDE) TO CREATE 1'/z"-DEEP GROOVE NOTE: MIDDLE BLANK IS A LEFTOVER OF WORKPIECE SCRIBE 45" LINE FROM THIS END Angled Notches. The clamp heads fit in angled notches cut in the clamping block. The third clamp keeps the block from slipping out of place. Firm Pressure. The clamping block allows the clamps to provide even pressure to hold the edging firmly in place without gaps. 17 |
