☰ Contents · Technology

Machine, joints and finishing

Lessons 38–41 · 4 lessons · Sh. Sharipov, N. Muslimov, O. Tolipov, Q. Abdullayeva, O. Qo‘ysinov, V. Sattorov, S. Ahmadaliyev, M. Mo‘minova. Mehnat ta’limi (Labour Education / Technology), Grade 5. Sharq Publishing, Tashkent, 2015
39

Making parts of carpentry items

Textbook: pp. 75–76
GoalKnow the sequence for making parts of a simple carpentry item from a drawing.
New words
drawing · chizmavegetable chopping board · sabzavot to‘g‘rash taxtasiwood screw · burama mixsequence · ketma-ketlik
Explanation

Many wooden items are made for the kitchen, living room and bedroom. Before making an item, the kind of wood is chosen according to its purpose, considering the wood’s hardness and resistance to the effects of use. For example, a vegetable chopping board is usually made of wood of medium hardness. The order of work: the drawing is made or read, wood is chosen, measuring and marking out are done, then sawing, planing, drilling if needed, filing, sanding and joining the parts (legs with ordinary or wood screws or by a cut-in method). The board can be decorated with patterns. Hanging boards have a decorated back and are hung on a peg on the wall. For complex operations ask the teacher for help; drilling and sawing are done only under the teacher’s supervision.

Worked examples
A board 300 mm long and 200 mm wide has area 300 × 200 = 60000 mm², i.e. 600 cm².
All sizes on the drawing are in mm; units are checked before marking out.
Class activity

Reading a drawing: the teacher gives a drawing of a simple board; pairs find length, width, thickness and hole positions and write the work order in 8 steps. No real tools are used.

Practice
1
What is wood chosen by for an item?
2
State at least 5 stages of the order of work.
3
If a board is 400 mm × 250 mm, what is its area in cm²?
4
Why is sanding done near the end?