Differences Between Precision Sheet Metal Fabrication and Standard Sheet Metal Fabrication
In recent years, as the market's requirements for the precision of sheet metal parts have increased, Precision Sheet Metal processing has begun to enter the center of the sheet metal industry stage.
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, home appliances, etc., and are an important manifestation of China's intelligent manufacturing. So what is the difference between precision sheet metal processing and standard sheet metal processing?
From the perspective of development history, precision sheet metal is actually an advanced version of sheet metal processing. The process hasn’t changed much. The biggest difference is that precision sheet metal processing reduces the precision tolerance range to less than 0.2 mm, while the accuracy of standard sheet metal processing is generally between 0.2 and 1 mm.
Curvature: 0-+/-0.1mm; Cnc Machining: 0-+/-0.1mm; laser cutting 0-+/-0.1mm.
The unwinding and leveling accuracy of precision sheet metal processing can reach 0.3~0.5mm, so sheet metal parts cut with laser/digital punch/water jet and produced by CNC bending can usually meet the dimensional accuracy requirements.
Sheet metal processing technology has gone through three stages: from using compasses, scissors, wooden squares and other tools for scribing processing, to hydraulic shears and bending machines that save labor in processing parts and have uniform surface quality after processing, to today's Cnc Processing equipment, which can bend and process parts. The bending angle can be accurate to 0.1°, and the size can be accurate to 0.1mm or even higher. There is no need to use a trapezoidal screw or thread to adjust the positioning a little or even several times as before, thus saving a lot of time and materials in the manufacturing and production of sheet metal processing parts.
Precision sheet metal uses high-precision CNC sheet metal equipment, which can realize complex processes that are difficult to achieve with traditional sheet metal processing. Precision sheet metal processing is also suitable for processing large and small batches of products, and has the characteristics of short processing cycle, good uniformity, high processing accuracy, high degree of automation, fast speed, simple and convenient operation and high efficiency.
- (1). Sheet metal processing has high power density: after the workpiece absorbs sheet metal processing, the temperature rises rapidly and melts or evaporates. Even materials with high melting point, high hardness, and brittleness can be processed with precision sheet metal;
- (2). Sheet metal processing is convenient and flexible: Robots can be used for precision sheet metal processing in harsh environments or places that are inaccessible to others.
- (3). Sheet metal processing is easy to control: it is easy to combine with precision machinery, precision measurement technology and electronic computers to achieve high processing automation and high processing accuracy.
Surface treatment methods for precision sheet metal parts processing: galvanizing, chrome plating, spray painting, electrostatic powder spraying.
Most precision sheet metal parts seen on the market have textures on their surfaces. These textures are obtained after surface treatment, which can effectively protect the sheet metal parts from external factors, rust, degeneration, etc.
