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Pipe bending equipment manufacturers to adapt to the economi

Pipe bending equipment manufacturers to adapt to the economic situation to implement reform

We need to use bending processing technology in many mechanical manufacturing, so do we have an understanding of it now?Here we first from some aspects to a simple understanding.

Large caliber cold bending pipe is a pipe fitting commonly used in long distance pipeline construction. It is made on site by using vertical hydraulic pipe bender according to the actual direction of pipeline and the measured Angle of bending pipe.Into the 21st century, the long distance pipeline engineering construction in China has developed rapidly, and China's complex and varied landscape, pipeline along the mountain hills, plains, more the demand of cold bending tube is quite big, but as a result of many who took part in the construction unit lacked the experience in the production of cold bend, on how to create a high quality of cold bend, is still at groping stage.As a manufacturer of cold bending machine, we have carried out deep research and test on how to ensure the bending quality of cold bending machine in the process of development, test and application, analyzed the common defects of cold bending pipe and put forward the control measures for reference.

Each cold bend is made through several bends.Steel pipe in the pipe bending machine, pipe bending machine for steel pipe bending moment, a moderate amount of deformation in the steel pipe local, form a certain Angle, the purpose of bending, the basic process is: the back-end fixture clamping steel tube, and then through the front lower die upward movement on the support of the main oil cylinder, make steel tube along the central curve bending deformation of upper die, until the bending type.In the process of pipe bending in Hangzhou, the deformation of the steel pipe occurs in the upper die, the die plays the role of the birth, and its curve is determined according to the critical value of plastic deformation of the steel pipe of different specifications and different materials.Lou to different steel tubes corresponding to different upper die.

According to the reason of the wrinkle, we control it from two aspects: on the one hand, the inner tube can not be placed near the side of the front fixture in the bending process, but should be placed near the side of the lower die bending cylinder, and the back of the inner tube is about 150mm beyond the back of the upper tire.At the same time in the first three bending, bending cylinder lift should not be too large, in the next step of the process of bending cylinder lift should gradually increase, until the steel pipe contact the highest point of the tire arc, so that the steel pipe in the bending process can be gently transition, to ensure that the steel pipe does not happen instability deformation.On the other hand, the inner tube should be adjusted before bending the steel tube. When bending the first root canal, the inner tube must be in a self-locking position to support the inner wall of the steel tube before bending.By taking the above measures, you can ensure that the steel pipe does not appear wrinkle.

In the bending process, we found that the axial position of the inner tube was not easy to control, so we designed and made a position-indicating car, and used a pole to rigidly connect the inner tube with the car.When the center line of the inner tube and the upper die overlap, write down the relative position of the car, a bending operation to steel tube to the rear axle to move the machine, together with the inner tube and the car move back length a homework, and then loosen the inner tube expansion mechanism, launch tube motor, make the inner tube, together with the car to move forward, until the car back to the original position calibration.In order to control the perpendicularity of the inner tube, we used a position indicator, which was fixed on the connecting pole, and a position mark was shown at the tube orifice. When the position indicator deflect, the inner tube was withdrawn in time and manual correction was carried out.