Metal stamping parts
common tear and skew forms are: blanking punching & ndash;
Stamping incision & ndash;
Flanging forming & ndash;
Incision & ndash;
Intermediate blocking bracket forming process has a variety of forms of tearing and skew, torn pieces are mainly distributed in the workpiece hole, side wall corner R arc from the junction of the wall neck and other parts, because of the different hardware stamping and production process conditions, supporting elements on the fracture site is different.
Tear can be formed by one-off tearing or fatigue crack or invisible crack development cause.
Cause analysis: according to the actual situation, through the torn, fracture morphology and degree of extrusion parts inspection, tear of the parts and skew behavior mainly reflects in the process of the flanging forming.
This process the cause of the phenomenon is as follows: forming process parameters being deployed.
In parts forming process, die, die core and two parts must be closely, slider sliding machine tool, by compressive plastic deformation shape.
But now because the shortcomings such as metal stamping parts quality is not stable, show that the machine is in the process of production pressure in the process of production in a state of imbalance of pressure loss.
The main reason is that the processing technical personnel not according to the requirements of the process to adjust the phase pressure machine, or did not pass at the time of each shift handover pressure stability of the machine tool information, lead to machine quality is not stable.
Flanging forming mould design flaws, die mold is a kind of double cavity around a common, because the technology content in addition to the flanging, also with forming the content, in addition to the special complex parts, narrow curved surface forming require the concave die core and forming surface, such as mold deformation.
Structural conditions for forming large travel and metal stamping area is small.
In the original die design, designers only consider the small pressed the characteristics, while ignoring the core forming guide slide stroke.
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