Elbow Process Flow
Jan 26, 2024
Steel Pipe Elbow Supplier-GNEE
- Stamping is a forming process that has long been used in the mass production of seamless elbows. It has been replaced by hot pressing or other forming processes and is used to produce elbows of ordinary specifications. However, in some elbows, Its output is small and the wall is too thick or too thin.
- Before stamping, the tube blank is placed on the lower die, the inner core and end die are loaded into the tube blank, and the elbow is formed through the constraints of the outer mold and the support of the inner mold.
- Compared with the hot push forming process, the appearance quality of stamping forming is not as good as that of the hot press forming process. The outer arc of the stamping elbow is in a stretched state during the forming process. Since it is suitable for single-piece production and low cost, stamping elbow technology is mainly used For the manufacture of small batches of thick-walled elbows.
- Stamping elbows are divided into cold stamping and hot stamping. Cold stamping or hot stamping is usually selected based on material properties and equipment capacity.
- The forming process of cold extrusion elbow is to use a special elbow forming machine to put the tube blank into the outer mold. After the upper and lower molds are closed, the tube blank moves along the gap between the inner mold and the outer mold under the push of the push rod. , complete the forming process.
- Cold extrusion forming elbows with inner and outer dies have the advantages of beautiful appearance, uniform wall thickness, and small dimensional deviation. They are often used in the forming of stainless steel elbows, especially the forming of thin-walled stainless steel elbows. The inner and outer dies have high precision and are suitable for pipes. The blank wall thickness deviation also puts forward higher requirements.
- In addition to the three common forming processes mentioned above, seamless elbow forming also uses a forming process in which the billet is extruded into the outer mold and then the inner ball of the billet is formed. However, this process is relatively complex, troublesome to operate, and the forming quality is not as good as the above-mentioned processes, so it is less used.
