Difference between precision sheet metal processing and ordinary sheet metal processing

In recent years, with the improvement of the precision requirements of the market for sheet metal parts, precision sheet metal processing has begun to enter the center of the stage of the sheet metal industry.

As a key production process in the machinery manufacturing industry, precision sheet metal parts are widely used in rail transit equipment, precision machine tools, automobile manufacturing, medical equipment, household appliances, etc., which is an important embodiment of China’s intelligent manufacturing. What is the difference between precision sheet metal processing and ordinary sheet metal processing?

Differences between precision sheet metal working and ordinary sheet metal working

From the perspective of development history, precision sheet metal is actually an advanced version of sheet metal processing, with little change in technology. The biggest difference is that precision sheet metal processing reduces the precision tolerance range to below 0.2mm, while the precision of ordinary sheet metal processing is generally between 0.2mm and 1mm.

Tolerance range of high-precision sheet metal processing: bending: 0 -+/-0.1mm; NC machining: 0 -+/-0.1mm; Laser cutting 0 -+/-0.1mm.

The uncoiling and leveling accuracy of precision sheet metal processing can reach 0.3~0.5mm, so the sheet metal parts cut by laser/digital punch/water jet and produced by CNC bending can generally meet the dimensional accuracy requirements

The sheet metal processing technology has gone through three stages: from the use of compasses, scissors, wood square and other tools for scribing processing, to the hydraulic plate shears and bending machines that save labor and have uniform surface quality after processing, and to today’s CNC processing equipment, the bending angle of the processed parts can be accurate to 0.1 °, and the size can be accurate to 0.1 mm or more, It is no longer necessary to use trapezoidal screw rod or thread to adjust and position bit by bit or even several times as before, thus saving a lot of time and materials for sheet metal processing parts manufacturing.

Precision sheet metal processing technology

Precise sheet metal adopts high-precision CNC sheet metal equipment, which can realize complex processes that are difficult for traditional sheet metal processing. Moreover, precision sheet metal processing is also suitable for large and small batch product processing, and has the characteristics of short processing cycle, good unity, high processing accuracy, high automation, fast speed, simple and convenient operation, high efficiency, etc

Characteristics of precision sheet metal processing

1. High power density of sheet metal processing: after the workpiece absorbs sheet metal processing, the temperature rises rapidly and melts or evaporates. Even materials with high melting point, high hardness and high brittleness can be processed with precision sheet metal;

2. Convenient and flexible sheet metal processing: robots can be used for precision sheet metal processing in harsh environments or places that are difficult for others to access.

3. Sheet metal processing is easy to control: it is easy to combine with precision machinery, precision measurement technology and electronic computer to achieve high processing automation and high processing accuracy;

Surface treatment methods for precision sheet metal processing: zinc plating, chromium plating, paint spraying, electrostatic powder spraying.

Most of the precision sheet metal parts on the market have textures. These textures are obtained after surface treatment, which can effectively protect the sheet metal parts from external factors, corrosion, degeneration, etc