Wood Joints Manufacturing II.

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Presentation transcript:

Wood Joints Manufacturing II

Wood Joints Joint - the close securing or fastening together of two or more smooth, even surfaces.

Wood Joints The joint to select depends on the need for: strength appearance difficulty of fabrication equipment available

Miter Miter- the joining pieces are cut at a 45-degree angle and joined to form a right angle. Miters are used for decorative molding and for frames. They are very weak and are often reinforced with dowels, spline, or mechanical fasteners.

Butt For simple boxes, cases, cheap drawers, frames and chairs. Very weak joint.

Spline strengthening joints For a Spline to add strength to a joint, its grain must run across the joint, not parallel to it.

Rabbet L-shaped groove cut across the edge or end of one piece. Rabbet joints are easy to make and moderately strong. boxes, drawers, shelving and at the corners of cabinet pieces Rabbet joints are sometimes made with a dado variation.

Dado a groove cut across the grain. typically used in making book shelves, drawers, steps, and book cases. strong joint. In very old furniture, a dovetail dado joint is a real work of art because of the time the cabinetmaker had to spend to cut it.

Edge to Edge This joint is used when laminating boards together edge-to-edge to obtain a wider piece of wood. Used for table top, desktops and cabinet sides.

Lap one side laps over the other A cross-lap joint joins two pieces with flush faces. The pieces may cross at any angle. Used for legs of furniture, doors, furniture frames and braces. This joint is strong.

Dowels method of strengthening joints You can put a dowel into butt, miter, lap joints to add strength to the joint.

Mortise and Tenon A large range of mortise and tenon joints exist and the most simple of these is shown. The tenon is the part that fits into the mortise. A glue is applied before the joint is pushed together. Clamps are used to hold the joint firmly together, usually for twenty-four hours.

Dovetail very strong because of the way the tails and pins are shaped. difficult to pull the joint apart and virtually impossible when glue is added. used in box constructions such as drawers, jeweler boxes, cabinets and other pieces of furniture where strength is required There are different types of dovetail joint and when cut accurately they are very impressive and attractive.

Biscuit methods of strengthening joints. Using thin wood wafers called biscuits can strengthen wood joints by providing more glue bonding area. You can use a biscuit joiner (also called a plate joiner) to cut precision mating slots in boards for the biscuits.