Frequently used bending methods for FRPP pipes in production

Bending is performed on a vertical or horizontal pipe bending machine. According to its process characteristics, it can be divided into three types: cored bend, coreless bend and top pressure bend. The cold work bending of pipes mostly adopts the bending method. In addition, simple pipe bending devices are often used for manual pipe bending in production, which also belongs to the bending method. 

Due to the low manufacturing cost of this type of pipe bending device and the convenient adjustment of the use page, it is suitable for small batch production without pipe bending equipment. Push-bending is bending processing on a general press, liquid stacker or pushing machine. The frpp pipe is mainly used for bending elbows. According to the characteristics of the push-bending process, it can be divided into two types: cold push-bending pipe bending and core-bending hot-push bending pipe. The cold push elbow is to press the tube blank into a mold with a bending cavity at room temperature to form a pipe elbow. 

The mandrel-type hot-pushing elbow is under the action of thrust and the resistance of the horn mandrel, it is heated while being pushed, so that the pipe is broken and produces circumferential expansion and axial bending deformation, so that the small diameter tube blank can be made into a relatively small diameter tube. Elbow with large diameter. Bending is the use of molds or molds to bend the tube blank on a hydraulic press. The press-bending method can be used to bend pipe fittings with straight sections and bend elbows. At present, press-bending is used to press elbows, and it has been widely used in the production of elbows. 

Roll bending is the bending process by tube cutting while driving the power rollers. The rolling method and the working principle of the rolling machine are basically the same as the sheet rolling. The difference is that the rollers used for tube bending have a working surface that matches the shape of the curved tube blank. By changing the interval of the rollers, it can bend with any radius of curvature. There is a certain limit to the bending radius of the bending square hair. It is only suitable for thick-walled frpp pipe fittings with a large curvature radius, and it is more convenient to bend ring or spiral bend pipe fittings.