In daily life, straight pipes are bent into various shapes for use at work. Elbows are bent by a complete set of bending dies. Elbows are mainly used for petroleum, infusion sets, etc., and play a more important role in aircraft and their engines. In such an important application, how much do we know about the processing methods of elbows? The following editor will tell you several commonly used elbow processing methods.
1. Punching method: Extend the pipe end to the required size and shape, and use a conical core on the punch.
2. Bulging method: One is to put rubber into the tube and squeeze the upper part with a punch to make the tube protrude. The other is hydraulic expansion, which fills the liquid into the middle of the pipe, and the liquid pressure expands the elbow into the required shape. Most corrugated pipes are produced in this way.
3. Forging method: Use a die forging machine to pull out one end or part of the pipe to reduce the outer diameter of the pipe. Commonly used forging machines are rotary, connecting rod and roller. Roller type: Place the core into the tube and push the roller outward to process the rounded edge.
There are two main types of bending processes: hot bending elbow and cold bending elbow:
1. Hot bending elbow
Manufacturing process of hot bending elbow:
After cutting the material, place the straight tube on the induction ring of the bending part of the steel pipe. The tube head is clamped by a mechanical rotating arm. The medium frequency current is used to heat the steel pipe in the induction ring. When the temperature of the steel pipe rises to the plastic state, the steel pipe is bent by the mechanical thrust at its rear end and is rapidly cooled by the coolant. Thus, the elbow is bent continuously, while heating, pushing, bending and cooling.
Hot bending elbows are mainly used for circular steel structures, tunnel supports, arc top beams, subway projects, aluminum doors and windows, ceilings, internal skeletons of packaging tubes, balcony handrails, shower doors, production line tracks, fitness equipment and other industries.

2. Cold bending elbow
In the production of cold bending elbows, we should actually pay attention to its own way. That is, the bending processing method at room temperature without heating or changing the material structure.
In various pipes, various elbows are inevitably used. Common pipes such as ship pipes or automobile oil pipes. Compared with other types of elbows, circular elbows have greater advantages. The flow of various materials in circular elbows is more stable because the impact force on the pipe wall is smaller and more uniform.

Use of elbows:

1. In various elbows, various elbows are inevitably used, such as ship pipes, automobile oil pipes and other pipes. Compared with other types of elbows, arc elbows have many advantages. First, various materials flow smoothly in the elbows, and the impact force on the pipe wall is small and uniform. Secondly, the stress concentration of the elbow itself is small, and the impact resistance is strong and high!

2. Air conditioning refrigeration pipes mainly include elbows, U-shaped small pipes, etc.; the bathroom industry actually now has more and more elbows, faucets, towel racks and S-shaped accessories.
Well, that's all for today's sharing. If you want to know more information, please comment and forward it!
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