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Sheet metal materials and sheet metal processing experience

  1. Definition of sheet metal: cold working of sheet metal
    Metal: steel, aluminum, copper, etc.
    Sheet: 6mm ‘or less
    Cold working: cutting / punching / cutting / folding
  2. Uses of sheet metal
    Manufacturing cabinets, car shells, support parts, and general metal appearance parts are all used for sheet metal materials.
  3. Commonly used materials for sheet metal
  •  Cold rolled sheet
    Specification range: thickness 0.25 ~ 3.0mm, materials above 3.0mm must be customized.
    1220mm and 1250 mm specifications, the length can be cut to any size as required. Generally it is 2440mm and 2500mm.
    Material characteristics: The surface is iron gray luster, and the surface is easy to be scratched and rusted. Care must be taken during processing to quickly reverse the order.
  • Hot rolled plate
    Specification range: thickness 1.4 ~ 6.0mm, maximum width 1524mm, generally
    1250mm or 1220mm, the material length can be cut to any size as required. Generally it is 2500mm or 2440mm.
    Material characteristics: The surface of the material is black and gray, which is not easy to be scratched, but easy to rust. It must be removed during processing. Suitable for structural parts such as baking paint and dusting.
  • Stainless steel
    General term for stainless acid-resistant steel that is resistant to atmospheric, acid, alkali, salt and other media. To achieve stainless and corrosion resistance, there are many types due to different alloy types and contents. Stainless steel features: good corrosion resistance, good brightness, high strength; a certain degree of elasticity; the surface treatment is mainly because the surface quality of the plate is sometimes not high after treatment (such as drawing) can improve the surface quality. Our company usually uses sus201 SUS304 and SUS316.
  • Galvanized sheet
    Galvanized sheet is galvanized on the surface of q235, so the name is galvanized sheet.
    Thickness specification 0.3 ~ 3.0mm, surface zinc flower types are: normal zinc flower (Z) light zinc flower (G), small zinc flower (X), light zinc flower (GX) zero zinc flower (N), zinc Ferroalloy (R).
  • Aluminum plate
    As the aluminum material for the plate, there are mainly the following two types, namely industrial pure aluminum and rust-proof aluminum. These two materials have high plasticity, good weldability, high corrosion resistance, but poor cutting ability.
    The aluminum content of industrial pure aluminum is greater than 99.00%, and usually has the following grades: 1050, 1060, 1070, 1100, 1200. The plate specifications are mostly 1250X2500 or 1000X2000. The thickness is from 0.3-7.0mm.

Sheet metal processingCutting: CNC punch, ordinary punch, LASER cutting machine, etc. Laser cutting: Fiber cutting gas cutting (cost calculated along the meter) is not suitable for cutting reflective materials. The film on the mirror panel must be removed during laser cutting, and the film must be attached when bending. Need to dot plasma cutting plasma cutting: cheap, suitable for cutting thick plates, conductive, there will be bevels, low precision can cut round tubes, small plasma cutting machine, easy to carry flame cutting, acetylene, cutting thick plates, laser small waterjet, Some materials are not suitable for thermal cutting.

How was the car made?

The stamping production process is a process of stamping a steel plate into a car body, that is, a body cover and a structural part. Stamping is a traditional material forming process. With the development of the automotive industry, stamping process is widely used in manufacturing. The stamping process greatly improves the accuracy and efficiency of material molding. Take the automotive industry as an example, stamping can punch a part every 5s, and the accuracy of the parts can generally reach more than 95%.

The development of stamping technology depends on the advancement of mold technology. Since the 1960s, computer technology has improved and its application in the manufacturing industry. CAD, CAE, CAM and other computer-aided systems, automotive mold development and manufacturing efficiency have greatly improved The machining accuracy of the large 5-axis machining center reaches 0.01mm, and the servo press also brings great convenience to mold debugging and part molding.

The stamping process of automobile parts generally includes four processes: drawing process, trimming process, punching process and flanging process. Each process corresponds to a set of molds. Sometimes in order to save costs, a set of molds is made for the subsequent trimming and punching processes and compressed into three steps.

The stamping process of automobile enterprises is basically similar, but the stamping technology of different materials is different. At present, under the background of automobile lightweight, aluminum body is used by more and more automobile enterprises. Due to the difference of material properties between aluminum and steel, aluminum body has some technical difficulties in stamping, and the manufacture of automobile mould also needs different surface treatment.

Four common stamping processes for stamping parts

Metal stamping parts are a processing method with higher production efficiency, less material loss and lower processing cost.

It is more suitable for mass production of parts, is easy to realize mechanization and automation, has high accuracy, and is also convenient for post-processing of parts.

In general metal stamping parts, in the production process, there are the following four processing processes:

  1. Punching: The stamping process (including punching, blanking, trimming, cutting, etc.) that enables the sheet to be separated.
  2. Bending: A stamping process in which the sheet is bent into a certain angle and shape along the bending line.
  3. Deep drawing: a stamping process that changes the flat sheet into various open hollow parts, or further changes the shape and size of the hollow part.
  4. Partial forming: A stamping process (including flanging, bulging, leveling, and shaping processes) that uses various local deformations of different properties to change the shape of the blank or stamped part.

Mid-Autumn Festival

Due to the Mid-Autumn Festival in China, our company’s vacation time is from September 13th to the 15th. For urgent help, please call us.

Happy Mid-Autumn Festival

Tenral Metal Products

Happy New Year

Dear Customer,

The New Year’s bell is about to ring, and will be kicked off in 2019. Here, our company wishes you health and happiness.

Best Regards

TenraL