​ problems common in stamping parts processing

 problems common in stamping parts processing

Steel all over the world, there are 60 ~ 70% is plank, most of which is made by stamping products.Car body, chassis, fuel tank, radiator fin, the boiler steam drum, container shell, motor, electric iron core silicon steel sheet stamping processing.Instruments and meters, household appliances, bicycles, office machinery, household utensils, and other products, also have a lot ofStamping parts。

A foreign body in 1, intensive: uncoiling line (iron, rubber, dust) mixed with causes convex concave;

2, the twists and turns: due to the uneven stress, drawbead matching bad or press the slider control bad parts r Angle parts or embossed parts causing twists and turns, strain;

3, adhesive, scratches: due to the friction material and punch or concave die in parts or die surface bad;

4, burr: mainly happens on the shear modulus and blanking die, blade clearance between big or hours will produce burr;

Line 5, migration: forming parts, the first contact with the mould parts of the squeezed and formed a line;

6, wrinkles, due to poor press slide block adjustment, low precision press, air cushion and inappropriate pressure adjustment, punch or caused big edge or r r parts of wrinkles.

7. To suppress stamping materials, twist method

(1). Reasonable mould design.In the progressive die, blanking order arrangement is likely to affect the precision of the stamping forming.For stamping fine blanking parts, general arrangement of large-area first cutting blanking, then arrange the punching blanking of smaller area, in order to reduce the cutting force of the influence of the stamping forming.

(2). Daily mold production, should pay attention to maintenance of convex and concave die cutting edge sharpness.When cutting blade wear, material by the tensile stress will increase, and stamping parts produced material, distortion tends to increase.

(3). Pressure material.Overcome the traditional mould design structure, open capacity on the stripper plate material clearance (namely die closed, and the material can be pressure. Key forming parts, stripper plate must be making set piece of structure, with convenient solution stripper plate pressure caused long time stamping parts produced by grinding (pressure) loss, not pressure material.

(4). The blanking clearance is not reasonable or uneven clearance is also produce stamping parts material, the reason of the distortion, need to be overcome.

(5). Add crush function.To discharge set piece of material of pressure increasing size (normal unloading with pieces of thick H + 0.03 mm), in order to increase pressure on the concave side material, thus inhibiting the punching stamping double material and torsion deformation.

(6). Punch edge end fix the bevel or arc.This is an effective way to slow down the blanking force.Slow down the blanking force, can reduce the tensile force of the concave side material, thus suppressing stamping double material and torsion effect.

8. Other specific issues: in the daily production, will meet punching small or large size (likely beyond specification) and the punch size is large, in addition to consider the design of the forming of convex and concave die size, machining accuracy and blanking clearance and other factors, also should consider the following several aspects to solve.

(1). Punch edge end shape.Such as end slope or arc, due to slow down the blanking force, salt pieces not easily get turn, twist, therefore, the punching size is big.And punch end plane (no slope or arc), punching size is relatively small.

(2). The cutting blade wear, material by tensile stress increases, stamping parts produced material, distortion tends to increase.Produce double way, punching size will be small.

(3). On the material pressure, make the material produces plastic deformation, can lead to punching size is big.And reduce pressure, punching size will be small.

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