red for identification purposes. The springs are given two coats of DeltaTone and are cooked both in between each coat and afterwards for 15 minutes at 200˚C. Finally, as part of the process to ensure the
springs meet the tight tolerances required, they are pre-stressed by feeding them into an automated line that first compresses the spring to near solid and then load tests each and every one. Although the customer requires the springs to be tested through one million cycles, William Hughes tests them through ten million – just to be on the safe side! The pre-stressing increases the fatigue life,
and the sorting ensures that the customer has parts in a very tight tolerance band. By reducing the load tolerance, the customer can dramatically increase the yield on his production line. So, a little more spent on the spring makes a huge amount of sense. Burgon concludes: “This is an excellent
example of how upgrading the specification of a relatively simple spring has provided significant benefits. As a result of upgrading
A selection of compression springs manufactured by William Hughes
the spring in the accelerator assembly, yield has improved from 80 to 97%, saving considerable time and money for our customer!”
Custom-made springs, wire forms & assemblies
Every spring we make is the best a spring can be.
producing a bespoke product
The same goes for wire forms and assemblies.
s.
• • Short & long runs • • UK, Bulgaria &
WilliamHughWilliam Hughes Group, Stalbridge, Dorset DT10 2RZ Z WH
T: 01963 363377 E:
sales@wmhughes.co.uk www.wmhughes.co.uk
Heat Treatment
Chemical Processing
Plus a full range of
secondary processes and
• Welding • •
• Steel & glass shot peening •
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