1 / 7

Engineering Presentation

Engineering Presentation. Sam Atkinson 12c4. Screws.

abie
Download Presentation

Engineering Presentation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Engineering Presentation Sam Atkinson 12c4

  2. Screws Screws are used to attach 2 or more pieces of material together. It is a really strong was of connecting materials because the screws have a tread on them which means that they cannot be pulled out of place easily. Screws are usually only used on materials such as wood because they would not be suited to metals.

  3. Nuts and Bolts • Nuts and bolts are also used to connect materials together. Although nuts and bolts tend to be used on metals because a screw would not be as good for the job. They work by having a thread on the inside of the nut and on the bold so that the bolt can turn into the nut and cannot be pulled apart, unless you twist it. These are strong and are used on a lot of everyday things such as tables and chairs.

  4. Rivets • a rivet is a permanent mechanical fastener and it consists of a shaft with a rounded head on the end. How it works is simple, you place the rivet into a pre made hole that is just bigger than the rivets shaft and heat the end so that it expands about 1.5 times its original size so that it does not fit back through the hole

  5. Contact adhesives • Contact adhesives must be applied to both surfaces and allowed some time to dry before the two surfaces are pushed together. Some contact adhesives require as long as 24 hours to dry before the surfaces are to be held together. Once the surfaces are pushed together, the bond forms very quickly. It is usually not necessary to apply pressure for a long time, so there is no need to use clamps.

  6. Cyanoacrylate • Cyanoacrylate is the generic name for what is known as super glue and Krazy glue. is a tenacious adhesive, particularly when used to bond non-porous materials or those that contain minute traces of water. It is also very good at bonding body tissue, and while this can be a bothersome (or even dangerous) side effect during everyday use, it has been exploited for the benefit of suture-less surgery.

  7. Epoxy resins • Epoxy is a copolymer; that is, it is formed from two different chemicals. These are referred to as the "resin" and the "hardener". The resin consists of monomers or short chain polymers with an epoxide group at either end. Most common epoxy resins are produced from a reaction between epichlorohydrin and bisphenol-A, though the latter may be replaced by similar chemicals.

More Related