Most of automobile sheet metal
stamping parts manufactured cold stamping process.
In actual production, automotive sheet metal stamping parts often appear all sorts of flaws: wrinkles, accumulation, necking, rebound, rough cutting edges, burrs, blank holder, slip line and so on.
Can lead to parts of scrapped parts stacked with defects.
Combined with work experience, analysis and solve the problem of sheet metal stamping parts are together.
After completion of sheet metal stamping parts in the forming process of the original state, on the red circle area, the parts are laminated defects.
These two areas are match with other parts of area, laminated seriously reduce the body's white pass rate.
Here's why.
Component characteristics design factors.
The product characteristics of design of stacking area, make the material when suppression is easy to collect.
Once the logistics is not smooth, stacking problems will occur.
Cause analysis: the parts stamping process factors.
This part adopts the forming process.
On the one hand, the forming process control of material flow effect than that of deep drawing process is poor, is not conducive to control the stacking problem.
However, in order to improve the material utilization, reduce the cost of vehicle stamping process is not used in the design of the deep drawing process, but using the forming process.
On the other hand, in the process of stamping, stamping direction to go against the flow of the material in the laminate area.
The improved, the problem of parts in the process of forming stacked got obvious improvement.
This is because the following measures: to optimize the design of the part features.
The improved mathematical model in each stack area adds a bar.
Reinforcement can improve stacking problems by dispersive aggregate.
Reinforcement to consider two factors: on the one hand, reinforcement do not make the parts fit interference;
On the other hand reinforcement height is unfavorable and exorbitant, otherwise the punch strength is not enough.
Therefore, increasing the suck rod size is limited, improve the effect of stacking parts is limited.
Optimize the parts stamping process.
In order to solve the problems of the parts to pile up, increasing the effect of suck rod is limited, should optimize the parts stamping process at the same time.
The forming technology, choose the reasonable stamping direction, can optimize the material flow, inhibition of laminated plates.
The improved stamping direction to the flow of materials in laminated area, so as to improve the lamination phenomenon.
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