On-Site Casting Repairs are specialist in repairing cracked, damaged and holed castings such as, cast iron, cast steel and aluminium using the cold metal stitching method.
Many advantages of this type of repair:
Minimum strip down
Repairs can be carried out on site and in-situ
No heat from welding hence no stress fractures caused
Generally no machining is needed
When the repair is completed it usually completely invisible
This repair procedure can be carried out in our workshop or on-site saving costly downtime in emergency break downs
Our specialist metal stitching repairs are commonly used to repair:
Vintage engine blocks Steam Locos
Gearbox casings Plant Machinery
Marine Generators Heritage Castings
Counter Weights Machine Castings
Heavy plant Industries Cylinder Heads
THE ON-SITE CASTING REPAIR PROCESS
On-Site Casting Repair is a method of repair of machinery, in steel, iron and aluminium which has been fractured or cracked. The repair consists of peening into prepared apertures at set centres, layering specialist keys.
The apertures are prepared at right angles to the fracture, and like the keys, take the form of circular sections joined by parallel sections. Holes are next drilled along the line of the fracture and these are tapped and filled with studs. This part of the repair is known as Metalace and is carried out progressively, one stud biting into its predecessor.
In areas of great stress concentration the Superlock is used. This is a block of high tensile steel, usally rectangular in shape. Like the key, the Superlock is inserted into a prepared aperture, secured with special dowels and studs, these are then peened to form a metal to metal contact. When completed the surface is usually flush with the parent metal.