Large forgings defects can do so

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Wrong shift
Wrong shift is forging along the parting surface of the upper half relative to the lower half of the displacement. The causes may be:bearing corp
â'  slider (hammer) and the ga p between the rails is too large;
â'¡ forging die design unreasonable lack eliminate dislocation force locking or guide posts;
The â'¢ mold poor installation.
Axis bending
The forgings axis bending, with the plane of the geometric position error. The causes may be:ball bearing screw
â'  forgings not pay attention to the mold;
â'¡ trimming Shouli Bu;
(3) forging cooling various parts of cooling at different speeds;thrust roller bearings
â'£ clean-up and improper heat treatment.