Sheet Metal Bending Parts

Bergek sheet metal bending process

About the sheet metal

Sheet metal fabrication is called sheet metal processing. Specifically, for example, the use of sheet metal to make chimneys, iron buckets, oil tanks oil pots, ventilation pipes, elbow size heads, tian yuan place, funnel shapes, the main process is cutting, bending buckle, bending forming, welding, riveting, etc. Sheet metal parts are thin-plate hardware, which can be processed by stamping, bending, stretching and other means of parts, a general definition is the thickness of the parts in the process of processing. Corresponding to the casting parts, forging parts, machining parts, and so on. Sheet metal processing materials are generally used in sheet metal processing materials are cold-rolled sheet (SPCC), hot-rolled sheet (SHCC), galvanized sheet (SECC, SGCC), copper (CU) brass, red copper, beryllium copper, aluminum plate (6061, 6063, hard aluminum, etc.), aluminum profile, stainless steel (mirror, drawing surface, fog surface), according to the different role of the product, Choose a material to differ, need to come up from product its utility and cost generally consider.


Sheet metal forming

Bending of sheet metal forming: sheet metal bending and forming is carried out on the plate bending machine, will be molding plate is placed on the plate bending machine, use lifting lever lift brake piece, workpiece slide into place, and then on the board that would reduce brake piece to molding, by applying pressure on the plate bending machine bending lever and metal bending forming


Typical products: consumer electronics, packaging, transportation, construction metal parts, etc


Suitable for production: suitable for mass production (no more than 5000 pieces), can also be customized


Quality: high bending accuracy, the error is about 0.1mm (0.004in)


Speed: up to 6 times per minute, although the initial configuration of the bending machine will take a long time

Sheet metal bending process characteristics

Semicircle: make a semicircle on both sides of the bending line first to prevent sheet metal from protruding out of the metal material after bending due to extrusion on both sides of the bending Angle. Bulge size is related to sheet metal thickness, the thicker the material, the more convex, therefore, the diameter of the semicircle is better than 1.5 times the thickness of the material.


Make an R Angle: If you do not make an R Angle, after many stamping, the original right Angle will gradually disappear to form an R Angle, but then the R Angle will have a little side length on either side. Therefore, make an R Angle before bending, and the internal Angle should be greater than or equal to half of the material thickness. If there is no explicit requirement for a right Angle, should be treated as R Angle; In the process of drawing mark R Angle, so as not to stop the line, resulting in mold damage.


Make a hole or edge hole: To avoid burrs, make a hole or edge hole at a turning point between the flat surface and the bending surface. After the bend, the width of the hole should be greater than or equal to 1.5 times the thickness of the meat.


Discount edge: discount edge is divided into unilateral and bilateral, compared with unilateral discount, the bilateral discount is more accurate, discount edge height is greater than 3mm; The parts on the sidewall shall be more than 10mm away from the bottom surface; There is also a hole on the sidewall can not be too close to the bottom, to keep more than 3mm, otherwise the hole will be pressed deformation.

Sheet metal bending process                 
Sheet metal bending                

Sheet metal bending                

Bending deformation

In the case of post-bending deformation, there are two kinds of deformation:


First, in view of the deformation formed by the force after bending, without affecting other parts, you can increase the reinforcement agent at 45 degrees Angle at the bending, increase the strength;


Two, because the plate shape is long and narrow type is not easy to maintain straightness, bending deformation, which can fold an L or fold two inverted "U" type edges, but sometimes will be interrupted by some factors, can not be connected from head to tail, then you can play the right amount of rib to increase its strength.

Applied materials

Suitable for almost all metal materials, the most commonly used materials are: steel, aluminum, copper, titanium, and other good ductility metal plate


Design considerations


1. The maximum bending length of a single piece can reach 16m(52ft)


2. The bending path of metal can only be straight


3. The bending inner fillet radius of the extensible material is 1 times the thickness of the plate, and the bending inner fillet radius of the hard material is 3 times the thickness of the plate


4. Bending thickness up to 50mm(2in) if the sheet metal has not been heat-treated

Company Advantage
    Bergek is good at making prototypes, small-batch, or mass production customized CNC machined parts, Come to get instant quotes on metal and plastic machined parts.
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