Although the precision sheet metal processing speed is still slower than the die punching, the material does not need to be clamped in the precision sheet metal. It has no mold consumption, no need to repair the mold, save the auxiliary time of the material and the time of replacing the mold, thus saving the processing cost and reducing the production cost.If the leaf shape holes are all changed to precision sheet metal processing, the average distribution and the size of the leaf shape face are guaranteed by the program. In this way, the single piece can not only get rid of a series of production progress caused by the obsolescence of the horizontal punch equipment and the die repair in the process of production, but also avoid the control of the hardness of the punch die. The quality problems caused by the good parts ensure the smooth completion of production tasks and the welding quality of component processing. In addition, the modern precision sheet metal system controlled by microcomputer can conveniently cut workpieces of different shapes and sizes, so considering the whole is more cost-effective.
Because the inner and outer rings of the rectifier are welded to the blades by argon arc welding, the weld is grade III weld and the weld is T shaped joint. After welding, the X light inspection and fluorescence inspection are not carried out. Only the appearance quality of the weld is checked according to the requirements of the process specification Q/2B366: the weld width should be uniform along the length, the weld width uniformity is 2mm, and the weld joints are not allowed to have surface pores, cracks, burn through, bite, collapse, unfusion, welding and arc pit. At the same time, the design requirements require no welding leakage on the reverse side of the weld. Because it is impossible to determine the influence of recast layer on the quality of argon arc welding produced by precision sheet metal processing. Therefore, it is necessary to set up an experimental plan to cut the parts to adjust the welding parameters, and to weld the leaf holes and blades of the cutting in order to determine the effect of the precision sheet metal recast layer on the welding quality.
The features of precision sheet metal:
Third, a variety of materials can be cut. Laser can be used for cutting metal and non-metallic materials.
Fourth, cleanliness, safety, and cutting noise are relatively low and pollution is small, which greatly improves the working environment of operators.
Second, the processing flexibility is good and the efficiency is high. The cutting process can realize numerical control all the time. It can cut arbitrary shape parts and carry out 2D and 3D cutting. The cutting speed is fast. If 2kW laser power is used, the cutting speed of 8mm thick carbon steel can reach 1.6m/min, and the thickness of stainless steel 2mm can be cut to 3.5m/min.
First, the cutting quality is good. The width of the incision is narrow (0.1 - 0.5mm), the heat affected zone is small, the deformation is very small and the precision is high (in the range of 300mm, the center distance error of the general hole is 0.1 - 0.4mm, the outline error 0.1 - 0.5mm), the notch surface roughness is good (general Ra=12.5 - 25 mu), and the cutting seam is not needed to be reprocessed.
However, because a certain engine has been finalized for many years, all the leaf holes have been processed by stamping. If the precision sheet metal processing is changed, the process parameters of the blade hole in the inner and outer ring of the precision sheet metal processing rectifier can not be determined.
Precision sheet metal is a material processing method with high energy density laser as cutting tool. Laser melting cutting means melting the metal by laser heating, and then blowing inert gases with the coaxial nozzle of the beam, making the liquid metal discharged by gas pressure and making the laser beam and material moving relative along a certain trajectory, thus forming a certain shape of the slit. Laser oxidation cutting means using laser as preheating heat source, using oxygen and other active gases as cutting gas. On the one hand, the ejected gas can react with the cutting metal, oxidize and release a large amount of oxidation heat. On the other hand, the molten oxide and molten material are blown out from the reaction zone, and the laser beam and the material are relative moving along a certain trajectory, thus forming a certain shape of the slit.
标签:   钣金加工 钣金 精密钣金加工