Marking & Joining

melissaivana13
Mind Map by melissaivana13, updated more than 1 year ago
melissaivana13
Created by melissaivana13 almost 5 years ago
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Description

higher gcse DT Mind Map on Marking & Joining, created by melissaivana13 on 04/17/2015.

Resource summary

Marking & Joining
1 Scriber
1.1 Sharp tool to mark accurate lines
2 Divider
2.1 Mark out circles or arcs.
2.2 One point digs in the material, whilst the other makes a line in the material.
3 Odd-leg calipers
3.1 Scribe line parallel to a staight edge.
3.2 The notched leg slide along material edge while the scriber point makes a line.
4 Surface gauge
4.1 Mark accurate parallel lines.
5 Dot punch
5.1 Marks positions of drill holes and make small dotted dents on already marked out lines.
5.2 Has a conical point ground to 60 degrees
6 Centre punch
6.1 Has a conical tip ground to 90 degrees.
6.2 Marks the centre of holes for drilling.
6.3 The punch is put into the dot punch mark and enlarges it.
7 Welding
7.1 Heat melts the edges of the metals being joined and forms a pool of molten metal. Then leave to cool.
8 Soldering
8.1 Bonds an alloy to form a joint.
8.1.1 'Parent metals' dont melt. The surface is cleaned with flux and heat is applied using a gas torch.
8.1.1.1 The solder is applied, which melts and 'runs' between the metals.
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