Please enable JavaScript.
Coggle requires JavaScript to display documents.
7.Joining, 128948768, ZON-3739377, 26145574, 34690282, GD11747, GD11748,…
7.Joining
PERMANENT JOINTS
Welding and soldering is the process of joining metal together, using pressure and heat on the surface. There are several types:
Soft soldering
We use a tin-lead alloy. This is heated with an electric soldering iron, which reaches temperatures of 400°C.Uses: Join tinplate, sheets of metal, brass and electronic and electrical components.
Oxyacetylene welding
An oxyacetylene blowtorch is used which can reach temperatures of over 3000°C.Uses: Sheets of steel in construction and in the shipbuilding and car industries.
Hard soldering
Brass or copper is heated with a blowtorch to a temperature of 800°C.Uses: Copper and brass; alloys of steel, bronze or cast iron.
Adhesives
There are different types: hot melt adhesives, waterproof and instant glues. Before gluing the pieces together, you should scratch the surface to improve its adherence.
Press fit joint
In this type of joint, a pin with a slightly larger diameter than the opening is inserted into the opening using a hammer or pressure.
Sometimes you have to pre-heat the hollow section to dilate the opening.
Rivets
This is a metal tube with a head at one end. It is inserted into the openings of the pieces to be joined together and then, with a tool known as a riveter, a head is placed onto the other end, joining the pieces.
TEMPORARY JOINTS
If you use temporary joints, they can be joined and separated again without breaking the joint or damaging the pieces.
Threaded stay bolts
This bolt has grooves at both ends, but the middle section is smooth.
Keyed joint
With a piece of metal called a key, you can join two objects by putting the key in a groove.
Screws
A screw joins one piece to another where there is a threaded hole. If the screw threads the hole as it is going in, we say it is a self-drilling screw.
Splined shafts
The two pieces have grooves so that they fit together when joined together. The assembled pieces can rotate.
Nuts and bolts
The bolt is inserted through the pieces that need to be joined together. Washers are used so that the pieces don't break and to secure the joint.
-
When the piece is finished and ready, we can join it to another piece by using permanent or temporary joints.
-
-
-
-
-
-
-
-
-
-
-
