Our rework solutions are as follows:1, the first step, four large holes in the illustration position to take laser cladding technology for welding, about one side thickened 0.5mm, according to our past.With processing experience, this welding produces little deformation to the part itself.2, the second step, milling up and down the box parting surface, one side about 0.3mm thickness;3, finally, the two sides of the box body correction in place, loaded with positioning pins, tight bolts, re-machining four large holes to the drawing requirements, while milling the two sides of the box assembly plane.