Permanent and Non Permanent Joints What is the

Permanent and Non. Permanent Joints

What is the difference between Permanent and Non-Permanent Joints • Non-Permanent Joints – These joints are easily removed • Types: • • Screws Nails Rivets Nuts and Bolts • Permanent Joints – are joints that cannot be removed easily • Types • Glue • Welding • Brazing

Methods for Joining Woods • Wood adhesives • Wood joints • Nails • Screws

Wood Adhesives – Permanent Joining Method • There are different types of wood glue but the most common is PVA (polyvinyl acetate) • Other types include Cyanoacrylate (CA) Wood Glue, Epoxy-based Glue, Polyurethane Wood Glue, and Hide Glue. • The type of glue you would choose depends on the strength and durability you require.

How to apply Wood Adhesives • https: //youtu. be/fftbphh 3 Swc

Wood Joints – Permanent Joining Method • Types of Wood Joints Include Dovetail Joints Dowel Joints Mitre Joints Tools Used: Routers and Chisels

Tools Used to Make Permanent Wood Joints • Routers https: //youtu. be/m. MDNg. Fqy. BLo • Chisels

Nails and Screws – Non Permanent Wood Joining Method • Nails are one of the most common type of metal fasteners used in construction today. • Nails work best when used to hold pieces of wood together. If you need to fasten anything other than wood, nails really aren't your best choice. They don't work well with bricks or metal. • Screws provide a mechanical advantage to nails. Driving in a screw takes less force than driving a nail into the same material. For builders using hand tools, this can make a construction project far easier when screws are involved

Tools Used to Drive Nails and Screws Screwdriver Hammer Allen Keys

Joining Metal • Types of Joints • • • Welding Brazing Nuts and Bolts Rivets Self-tapping screws

Welding – Permanent Joining Method • Welding is a fabrication process that joins materials, usually metals or thermoplastics, by using high heat to melt the parts together and allowing them to cool causing fusion. • Tools Used – Welding sets

Brazing – Permanent Joining Method • Brazing is a metal-joining process in which two or more metal items are joined together by melting and flowing a filler metal into the joint, the filler metal having a lower melting point than the adjoining metal • Tools Used:

Nuts and Bolts – Non Permanent Joining Method • Bolts are used to join pieces together either permanently or temporarily. Many steel structures, including buildings, are simply bolted together • Tools Used: Spanners and Sockets

Riveting – Non Permanent Joining Method • Riveting is commonly used to join Aluminum Alloys because these don’t solder very well • It gives a very neat finish while still providing the necessary strength of join • Tools Used – Rivet Gun

How to use a Rivet Gun

Self Tapping Screws – Non Permanent Joining Method • Self-tapping screws drill their own holes when they're screwed into materials such as wood, plastic and metal. By using a screwdriver to attach a self-tapping screw, you can create precisely fitted threads • Tools Used: Screw Driver

Joining Methods for Polymers • Welding • Adhesives • Nuts and Bolts • Self-tapping screws

Adhesives – Permanent Joining Method • Plastic can be an extremely flexible and durable. It can be difficult finding a glue to use in those projects, as many common adhesives don’t work well with plastic because plastics have extremely smooth and slippery surfaces this makes it difficult for the adhesive to find anything to bond with. • There a few common adhesives that can be used

Plastic Adhesives • Plastics marked with a PS or 6 are polystyrenes and work best with a poly-cement • Hard plastics like those used to make buckets are polyethylene or polypropylene the best adhesive to use is a two-part cyanoacrylate adhesive

Plastic Welding – Permanent Joining Method • https: //youtu. be/5 o. U 1 z. Aef. O 1 E