There are many types, materials and specifications of stainless steel elbows. Different specifications require the use of different production processes. Today, we will tell you how stainless steel elbows are formed.
1. Hot Push Molding
If the customer needs to produce stainless steel seamless elbow, we will use this production process. In the whole production process, 3 sets of equipment are mainly used, pushing machine, mandrel and heating device. Put the finished seamless tube on the mold, and then start the pushing machine. When the machine is moving, it heats the bent tube blank at the same time, and finally forms it. It is based on the rule that the plasticity of the pipe is consistent before and after deformation to determine the diameter of the pipe to be cut. In the process of heat treatment and heating bending of the steel pipe, the remaining positions are supplemented to be thinned due to the expansion of the diameter. Thus, elbows of uniform thickness are obtained. This is the push elbow manufacturing process. The elbow pushed by the pushing machine has a good-looking appearance and a consistent wall thickness. Most importantly, batch production and processing are also possible. And, it is also used in the forming of some standard stainless steel elbows.
2. Stamping
The process of manufacturing and processing stainless steel stamping elbows was originally used for mass production of stainless steel seamless elbows. Common elbow model specifications have long been replaced by hot push elbows. However, due to the small amount of manufacturing, the elbows of some sizes are either too thin or too thick. Customers have special requirements for finished products. We only use the stamping forming process in the production process. In the process of forming the stamping elbow, the diameter of the die must be consistent with the diameter of the manufactured elbow. Use a press to directly press into the mold. Stamping forming process is divided into cold stamping forming process and hot stamping forming process. Stamped stainless steel elbows are far inferior to push-formed stainless steel elbows, both in appearance and quality. During forming, the outer arc of the stamping elbow is in a stretched state. There is no additional material to supplement the remaining positions. Therefore, the thickness at the outer arc is reduced by approximately 10%. Due to the limitations of the manufacturing process and the characteristics of low cost, the stamping elbow manufacturing process is mainly used to produce high-pressure and thick-walled stainless steel stamping elbows in small batches. Extruded elbows are applied to professional elbow forming machines. Put the tube material into the mold, and put the molds on the upper and lower sides together. Under the advancement of the push rod, the tube material moves along the pre-reserved gap between the inner mold and the outer mold, and then ends the molding. The cold stamping process requires the use of an inner mold and an outer mold. The elbow produced by this process has a good-looking appearance, consistent wall thickness, and small size error. Therefore, the cold stamping process can be used to produce thin-walled stainless steel elbows. This process requires the use of high-precision internal and external molds, strict tube thickness, and extremely small error standards.
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