Sheet metal processing is sometimes made by drawing gold. The word comes from the English plantmetal. It usually makes some metal sheet metal deformed by hand or die stamping, forming the desired shape and size, and further forming more complex parts by welding or a small amount of mechanical processing, such as chimney and iron sheet furnace commonly used in the family, And the car covers are all made of sheet metal.

Sheet metal processing is called sheet metal processing. For example, the main processes are cutting, bending and trimming, bending forming, welding and riveting, etc. the main processes are cutting, bending and trimming, bending forming, welding and riveting, etc. it needs some geometry knowledge. Sheet metal is a sheet metal, that is, parts that can be processed by stamping, bending, stretching, etc. a general definition is the parts with constant thickness during the process. The corresponding is casting parts, forging parts, mechanical processing parts, etc., for example, the outer iron shell of the automobile is sheet metal parts, and some of the stainless steel ambry are also sheet metal parts.

Generally, the most important three steps of sheet metal processing are cutting, punching / cutting and folding.

1.1 the first step is the blanking (also known as blanking) process. Usually, the workers on site will cut the parts materials of the appropriate size from the large plates by the plate cutter according to the expansion drawings provided by the technical department. If the press is used, the dead zone of the clamp must be considered. After the blanking is completed, the worker will mark the material number with a marker on the surface of each piece of material.

Note: some factories do not have this processing step, and they are directly typesetting on standard plates and then directly stamping / cutting.

1.2 the material will then be sent to the CNC punch / cutter for punching / cutting process. In this process, NC (numerical control) code is required for the processed parts. Now most machine tool manufacturers will provide automatic programming software (almost all domestic manufacturers cooperate with foreign software companies to sell OEM, so they do not have their own software research and development team), so they have greatly facilitated programming engineers. The factors that the stamping / cutting programming engineer should consider are the utilization rate, cutting tool, efficiency, accuracy and so on. After stamping / cutting is completed, the part is removed from the micro connection and then sent to the bending machine for bending.

1.3 in the bending process, the main consideration is tool selection, bending order, bending compensation, bending interference, etc. Generally, there will be a random sales of bending programming software, but most CNC bending machines in China are still manual programming, often relying on the experience of teachers Fu. On the other hand, the domestic manufacturing process requirements have a certain distance from foreign countries, so the efficiency has not been improved, and the performance of CNC bending machine has not been played to the extreme.

1.4 finally, according to the product conditions, welding, grinding, painting, assembly, packaging and other processes may be carried out, which will not be described one by one.

2 overall, in recent years, sheet metal industry has developed rapidly. There are mainly the following reasons.

2.1 the demand for production capacity is improved. China is becoming an international machining and manufacturing center. With the increasing investment from abroad, the demand for metal processing capacity is increasing. In general, the electrical control box and machine shell in the metal processing industry are sheet metal parts, so the demand for sheet metal processing capacity is also increasing.

2.2 the machining accuracy requirements are low and easy to start. As far as gold processing is concerned, precision is common in several silk, and the complexity of technology is also relatively high, even some parts have dozens of processes. Therefore, the gold processing enterprises usually need various mechanical equipment to meet the different technological requirements. The precision of sheet metal punching is generally ± About 0.1mm, the bending accuracy can be generally reached ± 0.5mm, so the precision is much lower than that of gold processing.

2.3 high profit. For example, stamping can reach about 30%, while laser cutting can reach 50% or more.