1. My engineering project tipping swarf bin
Harry McMullan

2. Design brief
In my project I am manufacturing a tipping swarf bin/ dumper for workshop in Bangor
There are many others on the market although I aim to make my bin a lot lighter, more portable although can still carry the same load.

3. Major customer requirements
Manually operated by one person
Lift up to 50kg with 0.2m3 capacity SWL 25kg (safe working load)
fit existing 90l bins

4. Research What have you researched and what have you learnt
The height of the skip is 105cm
Have a lot of competition with existing products
The bin needs to be able to withstand wear and tear
Must be able to off load into a British standard skip
Websites for existing products;
existing product
other ideas
tipping skips

5. Existing measurements

6. Current swarf bins
two 57cm in length bins sitting on a 100x60x93(cm) trolley
Also another bin on a 73x 66 trolley
48cm aluminium bins
80L capacity

7. Density of swarf Mass of 0.517kg Volume = 0.00398m3
Density = mass / volume
Density = kg/m3
Density of steel = 760kgm3
Therefor if maximum weight is 25kg then the volume is 0.195m3 ie 195 litres

8. Product Design Specification
the product must last up to 5years with daily use
if safety regulations change the product must adapt and be easily changed
The safe working load will be 25kg
Maximium load of 50Kg
Must be able to deal with water/ coolant
The bin will be weigh between kg
Go up and down kerbs/speedbumps

9. Detailed design Bin height 650mm Wheel radius (5“) 125mm
Skip height 1050mm
Lifting distance 275mm min
Capacity of 25kg
Low centre of gravity

10. Tyre Selection Solid tyre 10” Holds up to 79kg Bearings included
Cost £21.99
Pneumatics
Capacity 250kg
Cost £19.28
Price of pneumatic tyres on eBay

11. Concept1 - barrow

12. Concept 2 trolley

13. Concept 3 scissor lift

14. Manoeuvrability 123cm between lathes in the workshop
98cm between front lathes
97cm access
10cm curb outside shutters and also opposite skip
Speed bump between shutters and skip
82cm in width door if shutters fail
width
height
length
80cm
80cm max
95cm

15. Initial prototype
I created a prototype to allow me to see the forces in which my scissor lift would encounter when lifting swarf.

16. Mechanism design
Importance of hole spacing Buckling is how it would fail Lift 300mm and 25kg From model if I lift 25kg with a mechanical advantage of 5 then 50N needs applied
LIFTING FORCE
Force applied 2N
2.5N
50g (0.49) 6N
100g (0.981) 7N
150g (1.47)

17. Max guidance for a worker to be lifting
There is no law on how much a worker can lift although there is set figures of guidance to maintain a high safety standard.
Male – 25 kg
Female - 16kg

18. Mechanism Threads on lead screw to lift and recline scissor lift
I used an Acme thread which is used in vices etc which doesn’t allow feedback
Uses high friction as safety feature
Easier to machine than square thread
Used a standard ball race bearing in for the rollers

19. Solidworks

20. manufacture Cutting material Scissor assembled
Welding the frame for trolley

21. Process I have used;
Welding
Milling
Turning
fitting

23. Questions
Thank you