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Ningbo Fanhua Precision Casting Co., Ltd.
Ningbo Fanhua Precision Casting Co., Ltd.  

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Ningbo Fanhua Precision Casting Co., Ltd. [China (Mainland)]


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Blog 2

Quality Analysis of Bending Stamping
 In actual bending stamping production, there are some rebound, sliding, bending crack and other similar problem in the quality of bending stamping parts.
1. Rebound of bending stamping
 Because the presence of elastic recovery stamping parts, the radius and bending angle of bending stamping removed after the bending force (work piece after removing the small mold) change (and the processing in jute mold in the shape change) of the phenomenon known as Jump elastic recovery (rebound).
Resilience is judged by changes in bending angle to measure the size. ΔΦ =Φ-Φ t
And there are some measures to reduce the resilience of bending stamping:
Designed to take measures from the bending stamping work piece.
The design of stiffeners
Material selection to produce bending stamping: selection of a large elastic modulus, yield limit of small sprayer, mechanical properties and stability of the material.
2\Crack bending stamping
Bending stamping tensile deformation zone is outside the zone, when the tensile stress in this area than the stress limit (ultimate strength) for cracks.
Bending the relative bending radius r / t are smaller, the deformation, the more easily to crack.
3\Sliding of bending stamping

As friction between the blank and mold there, when the friction caused by rough uneven shift, called the slip, so that the size of mainly the bending stamping parts:
Slippage of reasons in the bending stamping: ranging from the friction on both sides.
1). Work asymmetry, rough on both sides of contact surface with the mold is not equal.
2). The edge of the mold radius on both sides are not equal, the radius is small, friction is greater.
3). Not the same as the number of bending on both sides.
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