Common production process for flat welding flange
Common production process for flat welding flange:
- Round forging process of round steel pure material;
- Finished forging and cutting forming process;
- Steel plate cutting and blanking processing technology;
- Rough forging, expansion machine thermal expansion production process;
- Steel plate rolling production process, generally for large diameter flanges, such as flanges above DN600
The above is the type of flange raw material production process, but high-precision CNC lathe turning, CNC rocker drilling, final flange forming, packaging workshop for flange printing stencil marking and packaging, the company quality inspection department to carry out inspection, The inspection report is issued and the final flange is taken out of the warehouse.(Advantages and disadvantages of flat welded flanges)
Forging of flat welded flanges can be divided into free forging, upsetting, extrusion, die forging, closed die forging, and closed upsetting. Closed die forging and closed upset forging have high material utilization due to the absence of flash. Finishing of complex forgings is possible with one or several processes. Since there is no flash, the area of force applied to the forging is reduced and the required load is also reduced. However, care should be taken not to completely limit the blank. To this end, the volume of the blank is strictly controlled, the relative position of the forging die is controlled, and the forging is measured to reduce the wear of the forging die.
According to the movement mode of the forging die, the flat welding flange can be divided into pendulum, pendulum swivel, roll forging, cross wedge rolling, boring ring and cross rolling. Swing, swivel and shackle can also be used for precision forging. In order to improve the utilization of materials, roll forging and cross rolling can be used as a front-end process for slender materials. The same rotary forging as free forging is also partially formed, which has the advantage that it can be formed in the case of a smaller forging force than the forging size. In this forging method including free forging, the material expands from the vicinity of the mold surface to the free surface during processing. Therefore, it is difficult to ensure the accuracy of the flat welding flange. Therefore, the moving direction of the forging die and the swaging process are controlled by a computer.Flat welding flanges can be used to obtain products with complex shapes and high precision with low forging force.