Batteries shrapnel stamping produced when turning, the cause of the distortion

Batteries shrapnel stamping double material and torsion of the main reason for the influence of cutting force. Blanking, as a result of the existence of blanking clearance, material in the side of the concave die drawing ( Material up warping) , rely on the convex side by compression. When using stripper plate, using the stripper plate clamp material, to prevent the side of the die material up warping, at this point, the stress of the material of the corresponding change. With the increase of the unloading slabs the blank material force, rely on the convex side of material by the tensile ( Compression force decreases) Material and die surface compression ( Tensile strength decreases) 。 Batteries shrapnel stamping as double material on the surface of the die material caused by stretching. So when cutting, pressure and pressure material is to prevent the battery shell stamping double material, the key point of distortion. Precision stamping according to many years of experience, summed up the following inhibition of battery shell stamping double material and torsion method, for your reference: ( 1) 。 Reasonable mold design: in progressive die, blanking and the arrangement of the order is likely to affect the battery shell stamping forming precision. 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) 。 Pin material: overcome the traditional mould design, open capacity on the stripper plate material clearance ( The mold closed, stripper plate and die, and accommodate CaiLiaoChu stripper plate and die clearance for material thickness t - 0. 03 ~ 0. 05mm) 。 So, stamping in the stripper plate smooth movement, and material can be pressure. Key to forming part, stripper plate must be making set piece of structure, to facilitate solving caused long time stamping produced material parts on the stripper plate mill ( Pressure) Loss, and can't pressure material. ( 3) 。 Add crush function: the size of discharge set piece of pressure of thickening, to increase the pressure on the concave side material, thus inhibiting the punching batteries shrapnel stamping double material and torsion deformation. ( 4) 。 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. ( 5) 。 Maintenance should be paid attention to in daily mold production: convex and concave die cutting edge sharpness. When cutting blade wear, material by the tensile stress will increase, thus batteries shrapnel stamping producing material, distortion tends to increase. ( 6) 。 Blanking clearance is not reasonable or uneven clearance is also produce batteries shrapnel stamping materials, the reason of the distortion, need to be overcome.