Detail and Assembly Sketches Flashcards

A set of vocabulary flashcards covering detailed sketching techniques, various wood joints, and mechanical fixings as described in the technical design notes.

Detailed sketches

Sketches used within design development to show how an object will be made or work, conveying technical aspects of ideas more clearly.

Exploded sketches

3D sketches that explain a product with parts or components pulled apart to communicate how they are assembled.

Cross Halving joint

A joint that is quite strong and resists twisting; it is the only crossover joint that is flush (flat) on both sides.

Corner Bridle joint

A joint used for heavier, stronger frames because it has a large area of contact and cannot be twisted apart; it is difficult to cut.

Dovetail joint

A very strong joint often used for drawers where the front is pulled; it is difficult to mark out and cut and is used as a design feature.

Comb or Finger Joint

A strong joint characterized by having significant side-grain to side-grain contact.

Through Housing Joint

A joint specifically used for fitting shelves into cabinets, units, or partitions in boxes.

Panel Pin

A small nail made from rigid mild steel wire normally used with adhesive to hold a joint together while the adhesive sets.

Pin Punch

A tool used with a hammer to drive the head of a pin below the wood surface so that it can be hidden with wood filler.

Countersunk Head Screw

Made from mild steel or brass, this screw is used when the head needs to be flush with the surface of the wood.

Roundhead Screw

Commonly made of brass or mild steel covered in black lacquer or chromium plate, used for extra strength when the head can protrude from the surface.

Chipboard Screw

A screw designed with two spirals for use on chipboard so it does not pull out easily, requiring only half the number of turns to tighten.

Dovetail pinning

A method where pins and nails are driven in at an angle so they are less likely to pull out during use.

Round Wire Nail / Flat Head Nail

A nail made from galvanised mild steel used for exterior heavy construction where the head cannot be hidden; it relies on friction to hold in wood.

Oval Brad / Jolt Head Nail

A nail with an oval-shaped shaft that is less likely to split the wood when used correctly.

Nail placement safety rule

To avoid splitting, a nail should be placed at least $9 \times \text{its diameter}$ from the end of the wood.

Screw preparation steps

The process includes: A) drilling a pilot hole of smaller diameter than the thread, B) drilling a clearance hole of larger diameter in the joining wood only, and C) countersinking the clearance hole if required.