The Z12V190B high-speed high-power diesel engine aluminum piston produced by our factory requires a wall thickness difference of less than 0.8mm between the outer circumference of the skirt and the non-machined surface of the inner cavity. The traditional method is to use a three-claw self-centering chuck with long claws to clamp the port end of the outer round car, the mouth and a section of the outer circle, and then position the bottom plane and the stop to finish the outer circumference of the skirt. And other parts. Due to the casting precision of the blank, it is difficult to meet the inner and outer surfaces.
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