Dongguan sheet metal processing analysis common sheet metal characteristics Dongguan sheet metal processing analysis common sheet metal characteristics







4.1.1 Hole

Definition: A penetrating feature formed by removing material on a sheet metal product is called a hole;

Shape: square holes, round holes and shaped holes;

Function: 1. Process hole (with weight reduction, ventilation, avoidance, etc.);

2. Positioning holes (holes that position between two products or between two features);

3. Hardware hole (the bottom hole for the riveting hardware and special room);

4. Salad hole ("c'sink" with tapered chamfered holes, such as riveted salad and rivet salad)

Production equipment: wire cutting, punch punching, laser cutting, NCT and drilling machines can be used.




4.1.2 Bending (BENDING)

Definition: The use of bending equipment to machine sheet metal material from a flat plate to an angled

A process of non-flat products; its characteristic is called "folding".

Shape: generally 90 degree flange, but also non-90 degrees. See the picture on the right:

Role: with positioning, strengthening strength, limit, avoidance, etc.;

Production equipment: It can be processed by bending machine, punching machine and NCT.




4.1.3 EXTRUSION

Definition: Open the pre-hole on the sheet metal product, and then use the tool to squeeze the material around the hole to form a protrusion.

The characteristics of the surface (can also be understood as a process);

Shape: round (screw bud hole, riveted bud hole), oval, square, shaped, etc. See the picture on the right:

Function: It has the functions of positioning, limiting, avoiding, fastening (such as screw bud, riveting);

Production equipment: It can be processed by bending machine, punching machine, riveting machine and NCT.




4.1.4 convex hull (EMBOSSING)

Definition: Using a tool to deform the material on the sheet metal product, thereby highlighting the surface without breaking

Cracking feature; this process is often called "FORMING"

Shape: round, oval, square, shaped, etc. See the picture on the right:

Function: It has the functions of strengthening, positioning, limiting, avoiding, and heightening;

Production equipment: large convex hull is usually made by hydraulic press or punching machine, small convex hull can also be used with bending machine and NCT

Processing.



4.1.5 Bump (BUMP)

Definition: A very small convex hull that protrudes from the surface of the product like a "dot" shape.

Shape: often round, see right:

Function: with positioning, limit, fastening (such as pressure welding);

Production equipment: It can be processed by bending machine, punching machine and NCT.




4.1.6 Segment difference (OFFSET)

Definition: The two adjacent bends on the sheet metal product are positive and negative, like the letter "Z", we call

The difference is (the general H value does not exceed 5T);

Shape: Shaped like the letter "Z", with a straight edge and a hypotenuse. See the picture on the right:

Role: with positioning, strengthening strength, limit, avoidance, etc.;

Production equipment: usually made with a bending machine and a step mold.




4.1.7 Bridge

Definition: The material is torn and formed into a convex surface such as a bridge shape by a jig on a sheet metal product.

The feature is called a bridge.

Shape: There are arcs, planes and shapes. See the picture on the right:

Function: It has the functions of strengthening, positioning, limiting, avoiding, and heightening;

Production equipment: It can be processed by bending machine, punching machine and NCT.




4.1.8 Press dead edge (HEM)

Definition: On sheet metal products, we call the 180 degree bend to the dead side. It needs to be completed in two steps;

That is, fold 30 degrees first, then flatten it with a flat die.

Shape: straight, oval, square, shaped, etc. See the picture on the right:

Role: with anti-scratch, avoidance, strengthening, etc.;

Production equipment: can be processed by bending machine and punching machine.




4.1.9 Half-cut (HALF-SHEAR)

Definition: On sheet metal products, a straight wall of less than or equal to half the thickness of the material is produced by shearing.

Convex, we call it a semi-shear feature (also can be understood as a process);

Shape: round, oval, square, shaped, etc. See the picture on the right:

Function: Generally used for positioning and avoiding; (common knockout holes use this feature process)

Production equipment: It can be processed by bending machine, punching machine and NCT.




4.1.10 Reinforcement (RIB)

Definition: On sheet metal products, similar to the effect of increasing the strength of the two folds on the folds

Convex-like features, we call them ribs;

Shape: Commonly a solid triangle (also has a convex convex hull). See the picture on the right:

Role: has the role of strengthening, avoiding, etc.;

Production equipment: commonly used bending machines and punching machines for processing.

Role: has the role of strengthening, avoiding, etc.;

Production equipment: commonly used bending machines and punching machines for processing.




4.1.11 Round

Definition: On the sheet metal product, the round-like feature formed by the bending of the material, we call it the circle;

Shape: roughly divided into two; see the right picture:

Function: It has the functions of positioning, beauty, strengthening, scratch prevention, etc.

Production equipment: commonly used bending machines with jigs, punches and other processing.




4.1.12 Embossing / Stamping Die (MARK)

Definition: Use a punch with characters and special graphics to press the corresponding characters and graphics on the surface of the sheet metal product. This process feature is called embossing or pressing die;

Shape: line or graphic.

Role: with positioning, limit, character identification, etc.;

Production equipment: It can be processed by bending machine, punching machine and NCT.



4.1.13 Attacking (TAP)

Definition: The process of tapping the hole (including the pumping hole) on the sheet metal with the tap to break the internal thread, we call it the attack

bud.

Shape: direct attack on the plate and first hole and then attack. :

Role: the locking bolt or screw acts as a fastening;

Production equipment: manual tapping and tapping with a tapping machine.



4.1.14 PRESS HARDWARE

Definition: Open the pre-hole on the sheet metal product, and then use the tool to pass the specified hardware through the pre-hole.

Firmly press-fit into the material, this process is called riveting hardware. ;

Shape: There are many, depending on the hardware. The picture on the right is one of them::

Function: It has the functions of positioning, limiting, fastening, etc.

Production equipment: It can be processed by bending machine, punching machine and riveting machine.




4.1.15 Connection and fastening

Definition: The process of joining two sheet metal parts or two faces together by rivets, rivets, screws (bolts), riveting buds and welding, etc., is called coupling (fastening). :

Role: fastening effect;

Production equipment: processing with rivet machine, rivet gun and spot welder



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