Deep drawn parts of crack plane wall flange. Because the material by the radial tensile stress crack too dangerous section. Solution is to reduce the blank holder force; increasing the die radius; plus additional materials, lubricants or plastic.Workpiece edge serrated. The reason is the edge of a burr burr. Solution is repaired rough edge blanking die. Rectangular straight wall section is not flat.

Do not forget somethings.The reason is drawing most of the material suspended in addition the beginning of the blank holder force is too small, the die radius is too big or too much lubricant to reduce the radial tensile stress, the tangential tensile stress increased, material instability and wrinkling . Solution is to increase the pressure side or to use drawbead; reduce the die fillet radius or thicker material.Deep drawn parts have several common quality problems, the following briefly these problems and solutions.

The reason is too many rough corners or corner materials have glitches. Solution is to reduce the materials or polish rough corner corner glitch.Department of workpiece wall flange wrinkling and rupture. Because the BHF is too small, the flange part of the wrinkle, materials can not enter the die cavity and crack. Solution is to increase the blank holder force.Workpiece bottom of the depression or was contorted like. NingBo YinZhou WeiSheng is the profession production in various stamping parts,deep drawn parts,welding parts,machining parts, and metal deep drawn parts semi-processed goods and finished product etc..Because the mold does not come out too small to plug holes or vents; top feed bar and the workpiece contact surface is too small, the top feed bar is too long. Solution is to drill out the holes expanded; finishing top feeding device.
 
Because the rough center and punch deep drawn parts centers do not overlap or deep drawn parts uneven thickness; die radius and die gap unevenness. Solution is to adjust the location; school uniform clearance and trimming die radius.Risk profile significantly thinner. The reason is too small die radius, blank holder force too much material caused by the dangerous section of the radial tensile necking. Solution is to increase the die radius and clearance, rough coated with a suitable lubricant.
 
Pull off the deep drawn parts bottom of the workpiece. The reason is the die radius is too small, material to be cut in the state. Solution is to increase the die radius.Workpiece edge wrinkles. The reason is the die radius is too large stage deep drawing process is not out of the blank holder but not the material over the die corner than blank holder pressure, wrinkle after being drawn into the die to form the edge of wrinkles . Solution is to reduce the die radius or the use of curved blank holder.
 
Because deep drawn parts the corner gap is too small, and the surplus material to deep drawn parts the loss of stability and wrinkle wall extrusion. Solution is to enlarge the corner space, reducing the straight wall part of the gap.Conical or hemispherical pieces of pieces of wall wrinkling.Workpiece edge of the level of inconsistency.
 
Rectangular corner break. The reason is mold radius is too small, too small or workpiece clearance corner deformation. Solution is to increase the die corner radius and gap or increase the number of drawing .Rectangular corner I pulled off the top.Workpiece is not flat bottom. The reason is rough, deep drawn parts not smooth, the top bar and workpiece material contact surface is too small, too small elastic buffer. Solution is to smooth rough, finishing top feeding device.
 
Solution is to increase the pressure side or to increase the blank corner area. Ladder shape pieces of broken shoulder. Convex shoulder part of the reason is that when the material forming the direction of the bus received a large tensile stress. Solution is to increase the die exit and the convex shoulder part of the fillet or improve the lubrication conditions, use of plastic material better.Rectangular corner deep drawn parts inward shut local wrinkling. Because the material is too small BHF corner, wrinkling and pulling into the die cavity caused by local wrinkling.