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sheet metal stamping working

Sheet Metal Fabrication

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Sheet Metal Fabrication
Machining metal sheet material also called as metal plate fabrication,which mainly include cutting,bending,brake forming,stamping,welding,riveting and so on.Regarding sheet metal,we probably can understand that is a parts of constant thickness during processing.
Sheet metal is widely used in mechanical manufacturing,for example,we usuallly will use metal plate for making chimney,metal bucket,ventilation shaft,oiler,etc.
About the material,sheemt metal fabrication generally will use such as SPCC,SHCC,SECC,SGCC,copper,brass,red copper,beryllium copper,stainless steel (mirro surface,brush surface,matte,etc),aluminum (6061,6063,hard aluminum,etc).The manufacturer will offer their suggestion according to the use of the product,the cost that customer require.
1.SPCC mainly be used in electroplated parts and coated parts.The thickness of SPCC sheet parts is thinner than 3.2mm,with low cost and easily formed.
2.Like SPCC material,SHCC material mainly be used in electroplated parts and coated parts,with low cost.But the thickness of them are thicker than 3.0mm,also,they are hard to be formed.Mostly will be used for flat components.
3.SECC and SGCC material mostly for the parts that do not require surface treatment.Also,the cost for make them are highly.
4.Copper mostly for the product that require conduction of electricity,which will takes high cost.The surface finish for copper generally is nickel plating,chrome plating or without surface finished.
5.The surface treatment we usually will use for aluminum alloy material is anodizing,silver plating,nickel plating.
6.The section aluminum material with complex structure mostly will be used in subrack.
7.The stainless steel material made parts generally without surface finish.
The ways to cut material in metal plate machining as following.
1.The shears mostly is for cutting the simple shape material,tolerance is lower than 0.2mm,which are with low cost,but only can be used in machining the sheared strip or lump material.
2.The puncher can cutting the material into kinds of shape,the advantage of making sheet metal by puncher is with short time production,high efficiency,high tolerance and low cost,which are suitable for bulk prodcution,but it will need to make mould before producing.
3.About cutting the material by NC,we will need to programm before machining.The feature of this machining way is with low cost and tolerance is 0.15mm,but the structure of parts will be effcted by the structure of the tool.
4.We also can use laser cutting process to cut the material out of shape.Like the way of NC,laser cutting also need to programm before working,This way can cut the flat piece with complex shape,and tolerance is 0.1mm,but the cost of this way is high.
5.The saw machine can be usd in such as section aluminum,square tube, diagram tube and round bar material,also with low cost and low tolerance.

sheet metal fabrication

Sheet Metal Working

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Sheet Metal Working
With the characteristics of light weight, high strength, conductivity, low cost and good mass production performance,metal plate is a technology that has been widely used in electronic and electrical appliances, communication, automobile industry, medical devices and other fields. For example,it is an essential part in computer chassis, mobile phone,and so on.
The material of metal plate widely be used in electronic enterprises is SPCC,SECC,SGCC,SUS301,SUS304,etc.There are three main types of sheet metal processing: blanking, bending and stretching. Different processing technologies have different requirements for sheet metal. The selection of sheet metal also need be considered according to the shape of the product and processing technology.The following is the impact of materials on sheet metal processing technology.
a,The influence of materials on punching process.
Punching requires that the plate material should have enough plasticity to ensure the plate will not crack during machining.The soft materials such as pure aluminum,antirust aluminum, brass, red copper and mild steel have good punching performance,which can be blanked to the parts that have a smooth section and a small inclination.The quality of the hard materials is not good after punching,such as high-carbon steel,stainless steel,duralumin and ultralumin, the section unevenness is large, especially for the thick plate material.
b,, The influence of materials on bending process.
The plate materials to be bent should have sufficient plasticity and low yield limit.The plate with high plasticity is not easy to crack when bending. The plate with low yield limit and low elastic modulus has small rebound deformation after bending, and it is easy to obtain the bending shape with accurate size. Materials with good plasticity such as low carbon steel, brass and aluminum with carbon content less than 0.2% are easy to bend and form; Materials with high brittleness, such as phosphor bronze (qsn6.5 ~ 2.5), spring steel (65Mn), hard aluminum, superhard aluminum, etc., must have a large relative bending radius (R / T) during bending, otherwise they are easy to crack during bending.
c,The influence of materials on tensile process.
Sheet metal stretching, especially deep stretching, is a difficult kind of sheet metal processing technology. It not only requires the stretching depth to be as small as possible, the shape to be as simple and smooth as possible, but also requires the material to have good plasticity. Otherwise, it is very easy to cause overall distortion, local wrinkling and even tensile cracking of the parts.