What is sheet metal? Sheet metal is a comprehensive cold working process for sheet metal (usually less than 6mm), including cutting, punching/cutting/compounding, folding, welding, riveting, splicing, forming.
Its characteristics are:
1. uniform thickness. For a part, the thickness of all parts is the same
2. light weight, high strength, conductivity, low cost, large-scale production performance
- Processing technology -
1. Scissors
The equipment of the shearing process is a shearing machine, which can cut a sheet metal into a basic shape. The advantages are: low processing cost; Disadvantages: the accuracy is general, the cutting has burrs, and the cutting shape is a simple rectangle or other simple graphics composed of straight lines.
Before the cutting process, the expansion size of the parts must be calculated, and the size of the expansion size is related to the bending radius, bending Angle, plate material and plate thickness.
2. punch
The equipment of the punching process is a punching press, which can further process the cut material into shape. Stamping various shapes need different molds, the common mold has round holes, long round holes, convex; High precision.
Boss: The material is not removed, pay attention to the height of the boss is limited, related to the material of the plate, the thickness of the plate, the Angle of the boss bevel, etc.
There are many kinds of convex, including heat dissipation holes, mounting holes, etc. Due to the influence of bending, the edge of the design hole is limited from the plate edge and the bent edge.
3. Laser cutting
Processing equipment: laser cutting machine
For cutting, punching process can not complete the removal of materials, or hardness is easy to damage the mold of the plate, such as rounded corners, or there is no ready-made mold to press the required shape, you can use laser cutting to complete the forming of the material before bending
Advantages: no burrs, high precision, can cut any graphics, such as leaves, flowers, etc. Disadvantages: High process cost
4. Bend
Processing equipment: bending machine, plate rolling machine
They can fold or roll sheet metal into the desired shape, is the forming process of parts; The process of cold pressing the metal sheet through the bending machine knife and the lower knife to make it deformable and obtain the desired shape is called bending.
Bending is the last step of sheet metal forming, parts can be developed and bending molding need to pay attention to several points, the following small series and you say.
①Lack of materials
The boss is too high, exceeding the ductility of the material, the boss is generally used for the installation size of the pad height or to avoid the installation conflict, so the boss can be made without changing the internal structure of the material and without affecting the structural strength. For example, the Angle between the convex cone and the datum surface is 45°, and the height is 3 times the thickness of the plate
②Redundant materials
Redundant materials often have multiple curved edge phase closures, which are mostly due to process errors or drawing errors
③Bending limits
Most bending machines have certain limitations on bending.
Unilateral height: depending on the size of the bending machine and the height of the upper knife, the solution can be multilateral large Angle bending
Bilateral height: not greater than the unilateral height, in addition to all restrictions on the unilateral height, but also by the bottom limit: bending height < bottom edge
④Weld
Since sheet metal is formed by a sheet metal through bending, the contact of the bent edge is not sealed without hard connection, if not treated will affect the strength, usually the treatment method is welding, the technical requirements on the drawings are: welding Angle, welding Angle, round.
5. Surface treatment
Because the sheet metal sheet is thin, not suitable for hot dip galvanizing, the common surface treatment methods are: electrostatic spray, color with engineering, this process is suitable for the sheet material for the surface of the black.
Manufacturer of sheet metal processing
RM Manufacturing is located in Chengdu, Sichuan Province, the country of abundance, located in the southwest economic zone, convenient transportation. The company covers an area of 37,000 square meters and is the first of its two plants in the high-precision sheet metal processing industry.
Involved in the product field are unmanned car washing machine, water quality monitoring instrument, intelligent power change cabinet, intelligent self-service vending machine, car charging pile, self-service car washing machine, garbage recycling machine, ATM shell, CNC equipment shell, locker, power cabinet, communication, medical, etc., for non-standard self-service intelligent equipment to provide an overall solution.
Post time: Aug-07-2023
