Repair of mechanical parts - how to drill crack prevention holes in gas welding repair

Repair of mechanical parts - how to drill crack prevention holes in gas welding repair

Machine tool maintenance, CNC machine tool maintenance, equipment overhaul, gas welding repair process, crack prevention hole

How to drill anti crack holes before gas welding repair in machine tool maintenance, CNC machine tool maintenance and equipment overhaul

Before gas welding repair, anti crack holes shall be drilled, that is, a through hole shall be drilled 3 ~ 5mm away from the end of the crack to eliminate the influence of stress concentration at the crack end, so that the crack will not continue to expand during welding. The diameter of cast iron gas welding crack arrest hole can be selected according to the following table.

Table 1 diameter of cast iron gas welding crack arrest hole (unit: mm)