Stands specifications

The four stands under the machine are M10 headless bolts. Made from the steel type 9SMnPb28K. With a length of about 100mm.
They have a strength class of 5.8. This means the ultimate tensile strength is 500N/mm² and a yield point of 400N/mm². (500 x 0.8)


The amount of pressure the stands deliver to the ground. One stand has a diameter of 50mm. The machine weighs 400kg.

surface area: 25².pi = 1963,5 mm²
weigth force : 400 . 9,81 = 3924N -> divided over the 4 stands = 981 N / stand

One stand gives 0,5 N/mm² pressure to the ground or 499619,2 Pa.

Technical Improvement

Rivets specifications

In these tables we can see that the rivets are made in steel type QSt 32 -3. This material has an ultimate tensile strength of 390N/mm².

These rivets are 3 mm wide and have head width of 5.2mm (see second table) and will have a length of approximately 10mm ( 2 x 3mm (sheet metal) + 1.5 x 3mm (extra length needed)).

Overview

R factor PU foam

The PU foam used for insulation of the machine has an R factor of R7 - R8 per inch.


link:
http://www.energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11600

Printboard

This is the heart of the machine.

- It makes sure the temperature is constant.

- When a coin is accepted and a choise is made, it powers the right coil.

- All the data transport goes through here.

Drawer blocking system

This simple system makes sure you cannot reach the products inside the machine.
When you push the lid the other lid also rotates so that acces to the machine is impossible.



The red part here is a two force member.

Slideshare

link:

http://www.slideshare.net/PlatteauThijs/how-a-vending-machine-works-short

Production techniques

- Case:

Steel production:
http://www.youtube.com/watch?v=33yRS77iL0w

Sheet metal forming:
http://www.youtube.com/watch?v=qTUMbVNf1Xc

Spot welding:
http://www.youtube.com/watch?v=AwL1CAg43PU

http://en.wikipedia.org/wiki/Spot_welding

Riveting:
http://www.youtube.com/watch?v=5DVPG8go4Jk


-PU foam:

http://www.youtube.com/watch?v=pcEs44ECdnI

http://en.wikipedia.org/wiki/Polyurethane#Production


- Coils:

http://www.youtube.com/watch?v=Ix4-UUelDc4

http://en.wikipedia.org/wiki/Coil


-Inox (stainless steel):

http://www.youtube.com/watch?v=cvXtUKYs3tw


- Layered glass:

demo:
http://www.youtube.com/watch?v=nRtDc2_SI40&feature=related

proces:
http://en.wikipedia.org/wiki/Laminated_glass#Manufacturing_processes