What are the precautions to be taken in the production of elbows?

What are the precautions to be taken in the production of elbows?

Elbow is a type of pipe fitting, which is used to connect pipes into parts of a pipeline. According to the connection method, it can be divided into four categories: socket fittings, threaded fittings, elbow fittings, and welded fittings.

In the commonly used elbow specifications, it has been replaced by hot pushed elbows, but in some specifications, the elbows are too thin or too thick due to a relatively small production quantity.

When there are special requirements for elbow products, stamping production manufacturing technology is only used. In the process of stamping elbow forming, the diameter needs to be the same as the diameter of the produced elbow, and a press machine is used to directly press it into the mold.

Stamped elbows can be divided into cold stamping and hot stamping. The material selection and manufacturing process of stamped elbows are not as good as push made elbows, and their quality and appearance are not as good as the former. When forming stamped elbows, the outer arc is in a stretched state, and there is no extra metal in other parts to compensate, so the wall thickness at the outer arc is reduced by about 10%.

However, due to its suitability for unit production and low cost, the stamping elbow production process is suitable for the production and manufacturing of high-pressure thick walled stamping elbows in small batches.

Squeezing elbow uses a one-on-one elbow forming machine to place the pipe blank into the mold. After the upper and lower molds are closed, the pipe blank moves along the gap reserved by the inner and outer molds under the push of the push rod to complete the forming process. The elbow produced by using internal and external cold extrusion technology has a beautiful appearance, uniform wall thickness, and small size deviation. Therefore, the cold extrusion production process is suitable for the production and manufacturing of thin-walled stainless steel elbows, and the precision requirements of the internal and external molds used in this process are high; The requirements for wall thickness deviation of the pipe blank are also quite strict.