While performing a press inspection, our team discovered severe cracks in the main bushing housings of this 1000-ton press. MPA developed a plan for action while our customer prepared for the outage required to make the repairs. The crown was removed, transported to our Lansing facility, stripped then welded to repair all fractures. Areas susceptible to damage were then reinforced and stiffened. The 120,000 lb. crown was then thermal stress relieved on our floor. We then line bored and skin cut all surfaces necessary to maintain original specifications. All new bronze bushings were made and fitted to the crankshaft. Counterbalances and driveshaft were rebuilt while the crown was down. Additional work included welding and machining of the slide (showcased in a previous post.) The slide was an unplanned repair, but also one that was performed without adding to the original timeline of 10 weeks. Our welding team worked tirelessly around the clock to pull that one off!
Fractured press crowns and beds are becoming more frequent as stampers push older machines to their limits. Fortunately, MPA has the knowledge and resources necessary to breathe new life into these presses and provide many more years of service.