Matters needing attention and stamping process optimization of sheet metal cabinet

【1】Precautions for sheet metal cabinet

Sheet metal cabinet is not only the pivotal technology that sheet metal technicians need to grasp,but also an important process of sheet metal product forming.Sheet metal cabinet includes traditional cutting and blanking,blanking,bending and forming methods and process parameters,as well as various cold stamping die structures and process parameters,various equipment working principles and operation methods,as well as new stamping technology and new process.The processing of parts and sheet metal is called sheet metal cabinet.Sheet metal processing is called sheet metal stamping.Specifically,for example,the use of plates to make chimneys,iron barrels,oil tanks,oil pots,ventilation pipes,large and small ends of elbows,round places,funnel-shaped,etc.the main processes include shearing,bending,edge buckle,bending forming,welding,riveting,etc.,which need to determine the geometric knowledge.Sheet metal cabinet is sheet metal,that is,parts that can be processed by stamping,bending,stretching and other means.A general definition is parts with constant thickness in the processing process.Corresponding to casting parts,forging parts,machined parts,etc.matters needing attention

1.The deployment method shall be consistent,convenient,material saving and processability

2.Reasonably select the gap and edging method.The gap below T=2.0 is 0.2,t=2-3,and the gap is 0.5.The edging method adopts long edge wrapping short edge(door panel type)

3.Reasonably consider the tolerance and overall dimension:the negative difference goes to the end and the positive difference goes half;Hole shape and size:the positive difference goes to the end and the negative difference goes half.4.Burr direction 5.Draw a sectional view in the direction of tooth extraction,riveting,tearing,punch bump(package),etc

6.Check the material and plate thickness to the plate thickness tolerance

7.Special angle.The inner radius of bending angle(generally r=0.5)shall be determined by trial bending

8.Prompt for error prone(similar and asymmetric)places.

【2】Optimization of stamping process for laser cutting sheet metal parts of automobile body

The first mock exam technology includes the forming/open drawing/shallow drawing process,the two parts design,the process optimization and so on.

In order to improve the material utilization rate of stamping process,it can be realized by giving priority to forming process,open drawing and shallow drawing process.Because the drawing process needs to set a large number of process supplementary surfaces and blank holder,the consumption of raw materials is much greater than that of the forming process.

The first mock exam of two processes is mainly based on the material utilization ratio of door panels and other parts,which can be shaped by symmetrical configuration,which can change the forming state and material utilization ratio.

For parts with large shear area,such as side wall,back door,door inner and outer plate,small parts can be nested and formed in the"waste"part in advance,and the cost of sheet metal parts can be reduced by reducing small part materials and die costs.For the surplus materials of the side wall door opening,other small laser cutting sheet metal parts can be produced through the recycled surplus materials,so as to reduce the material cost.