Several common problems encountered during the process of pipe bending machine processing

Pipe bending machine technology is now widely used in power construction, public railway construction, boilers, bridges, ships, furniture, home appliances, and decoration industries in China. Its technology is also constantly developing with the progress of modern technology. When processing automotive exhaust pipes, it is necessary to use a pipe bending machine, and pipe bending technology is also an important part of automotive muffler processing technology. Here, we will roughly summarize the common problems of pipe bending.

From process analysis, it can be seen that common bending defects mainly take the following forms: severe flattening at the arc, excessive thinning of the outer pipe wall of the arc, bending cracks on the outer side of the arc, wrinkling on the inner side of the arc, and bending rebound. As the radius of the bend varies, the ways and locations of the first four defects are different and may not necessarily occur simultaneously, while the elastic rebound of the bent workpiece is inevitable.

The existence of defects in pipe bending machines can have a significant negative impact on the quality of bent pipe fittings. The thinning of the pipe wall thickness will inevitably reduce the ability of the pipe fitting to withstand internal pressure and affect its performance; The distortion of the cross-sectional shape of bent pipes may, on the one hand, cause a decrease in cross-sectional area, thereby increasing the resistance of fluid flow, and on the other hand, affect the functional effect of the pipe fittings in the structure; The wrinkling of the inner wall of the pipe not only weakens the strength of the pipe, but also easily causes uneven velocity of the flow medium, generates eddy currents, and accumulates dirt in the bending part, affecting the normal use of the bent pipe fittings; The rebound phenomenon inevitably causes the bending angle of the pipe to be greater than the predetermined angle, thereby reducing the accuracy of the bending process.