Sheet metal fabrication, as the name suggests, is an item made from sheet metal according to demand. Commonly used sheet metal items in life include computer case cabinets, TV backplanes, car casings, air conditioner casings, terminal integrated casings, charging pile boxes, etc. What are the processing techniques for sheet metal processing? We summarize as follows:
The main processes of sheet metal fabrication include cutting and blanking, CNC bending, punching, punching, rounding, riveting, welding and other methods. It can also be said to be the working principle and operation method of various equipment. All sheet metal processing processes are based on careful design and specification of product drawings by sheet metal engineers before operation.
The main process terms are: blanking, riveting, bending, cutting, blanking, punching, riveting, pulling mother, pulling riveting, riveting, corner cutting, forming, punching convex hull, punching and tearing, punching, expanding Hole, punching, chamfering, back thread, drawing hole, tapping, leveling, drilling, countersinking, leveling, welding, spraying, assembling, etc.
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Blanking
There are many ways of blanking, which refers to the process of laser cutting or CNC punching and shearing. NC CNC blanking and laser cutting blanking can be used for thicker and more complex sheet metal processing parts; shears can cut out workpieces with larger shapes, lengths and widths; punching machines can use punching machines in batches to cut workpiece shapes and holes. processed.
Punching
Punching is also called flanging, which refers to the process of using a die to form a round hole on the workpiece on an ordinary punch or other stamping equipment. It is to draw a hole of a specified size on the pre-punched hole, which can make the teeth tapped by the workpiece stronger. It is generally used on workpieces with a thickness of less than 1.5mm.
Pressure riveting
Generally, it refers to the process of firmly riveting and crimping rivet studs, rivet nuts, rivet screws, etc. on the workpiece by using a punch or hydraulic riveting machine.
Bending
Bending is a process in which a workpiece is formed by a bending machine with a bending machine and related bending dies, which can strengthen the strength of the workpiece to a certain extent.
Welding
Common types of welding processes include two-shielded welding, argon arc welding, electric welding, robot welding and butt welding, etc. The process is mainly to weld 2 or more parts together to achieve the purpose of processing finished products or assembled parts; Or the edge seam of a single part needs to be welded to make the bending edge precise to increase the edge folding strength.
Surface treatment
The surface treatment includes phosphating coating powder spraying, electroplating colorful zinc, chromate, baking paint, oxidation, etc. After the phosphating coating, the workpiece can be electrostatic powder sprayed, which is suitable for cold-rolled sheets and galvanized sheets; electroplating colorful zinc is generally used for cold-rolling. Surface treatment of plates and machined parts; chromate and oxidation are generally used for surface treatment of aluminum and aluminum profiles; surface treatment is to make the sheet metal parts look beautiful as a whole and to protect themselves. , The specific surface treatment method is determined according to the customer’s material requirements.
Assembling
It is to assemble multiple parts or components together according to the requirements of the drawings to form a complete workpiece product. The assembled workpiece may be a finished product or a semi-finished product.
