Crack Repair of A Press Frame-3500 Ton Capacity | RA Power Solutions: 44 Years Of Experience in Metal Lock

RA Power Solutions was approached by a leading automobile manufacturing company based in North India to execute the repair of a damaged main frame body of 3500 Ton Press, supplied, installed, and maintained by a renowned Japanese company. RA Power Solutions team of engineers visited the plant during the shutdown and following was observed.

• The main frame of the 3500 Ton Press, which developed crack was the backbone of the plant as the complete body of the vehicles including doors/bonnet etc were formed on the press.
• The company was asked to disassemble all the parts, adjacent to the area where the crack was developed.
• The crack area of the press was thoroughly cleaned. Paint and red oxide were completely removed by the chemicals.
• The hardness test of the crack area of the press was undertaken.
• The MPI test was done on the crack area where a crack having a horizontal profile measuring 400 MM was observed.
• The crack was through the complete width of the frame plate having thickness of 40 MM.

Planning and Execution of Repair of Crack Area By Metal Stitching and Metal Locking Process

All the technical parameters including load characteristics of 3500 Ton Press were studied by the RA Power Solutions engineers and it was decided to go ahead with the repair of crack by metal stitching and metal locking process.

• Two drills on the extreme end of the crack were done to arrest the crack and stop it from further expansion.
• The crack area was metal stitched as per following procedure.

Crack having a Length of 320 + 80 mm	Metal Stitching Under Process

1. Punching the total crack length.
2. 06 no’s rows were slotted in depth of 28mm across the crack length for the fitment of L-30 Lock.
3. 18 no’s Locks (L-30 (Surface)=06 nos. and L-30 (Bottom)=12 no’s) were inserted in the slot.
4. Holes were then drilled along the crack Line. The holes are filled with stitching pins, each pin overlapping into its predecessor, resulting in a pressure-tight join and restoring rigidity to the casting.
5. The stitching pin and Keys are then ground down flush. Completing the repair.

The press has been assembled and is performing satisfactorily after the repair by Metal Stitching and Metal Locking Process.

Press Crack Repair by Metal Locking Process	Cross Stitching of Crack

RA Power Solutions regularly undertakes repair of main engine components, which develop multiple cracks at different locations and length. RA Power Solutions, with 44 years of presence in the international market, has been successfully repairing heavy cast iron, aluminum, bronze, and cast steel components using the metal locking and metal stitching process. This is a cold process and no heat is generated.

For more information on metal lock, repair of Crack area by metal stitching, metal stitching and metal locking process please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Press Crack Repair By Metal Locking	Finishing of Crack Area After Metal Stitching