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Tuesday, September 11, 2012

Keeping the Mining Industry Mining

By John Wright


Weekly inspection schedules an all heavy mining gear is a vital element of mining engineering maintenance needs of crucial and expensive mining machinery.

The particular focus of these inspections is always on those key high stress parts and areas of the machines with a history for stress and fatigue fractures.

Repairs and/or renovation of a stressed or smashed part are always quicker to do to complete the earlier the issue is detected.

Case in point:

A 390 ton Terex RH170 excavator on-site at a coal mine goes through is common weekly maintenance inspection and is discovered to possess a noticeable stress fracture in the critical H-link. The machine is instantly taken off line. Every hour of down time = money lost for the mining company.

The engineering team are called out to the mine to assess the difficulty and get on with the business of getting the machine back on line as quickly as achievable. The five man Mining Engineering Fast Reply Team have the fractured 2.4 ton H-link removed from the machine and a replacement fitted to the manufacturers spec is 5 hours flat.

The machine is re-certified and back on line inside 6 hours of the team arriving on site. But that's the straightforward part. The Cracked 2.4ton H-Link is loaded and transported back to the workshop facility where the team do a thorough inspection on the fracture and confirm the best plan to mend and refurbish the H-link.

Backed by years of experience the mining engineering team is well versed in what needs to be done to successfully mend the cast and grade steel H-link. Although this 2.4 tonne part is large, the team have at their disposal a considerable range of heavy lift apparatus and all the required tools to get the task finished quickly , effectively and safely.

A solidly established and step-by-step process of cleaning, grinding, pre-heating and air ark gouging lays bare the splinters and prepares them for the critical cross and mix 81NI Mig welding that will not only repair the splinters but will really brace what are known to be puny or potential failure areas.

Engineering a world's best practice fix on this vital piece of gear needs both the talent and focus of the mining engineer and the adherence to a highly technical process of preheating, gouging, run off plates, grinding and layering of the 81NI Mig welds.

The final result is an entirely refurbished H-link that's absolutely repaired, cleaned, repainted, re-certified and returned to the mining company ready to be swapped out to another machine should the eventuality pop up.

The 24/7 engineering fast response team members pride themselves on providing mining engineering services that get high value mining machines back on line in the shortest possible time, ensuring any down time and successive loss of revenue to the mine is keep to an absolute minimum.




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