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Pipe bender equipment for customers to change the economic s

Pipe bender equipment for customers to change the economic situation

We need to use the technology of bending pipe processing in a lot of machinery manufacturing, so now whether we have an understanding of it? Let's take a brief look at some aspects first.

Large-caliber cold-bent pipe is a commonly used pipe fitting in the construction of long-distance transmission pipeline. It is made on site by vertical hydraulic pipe bender according to the actual direction of pipeline and the required bend Angle measured. 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 conducted deep research and test on how to guarantee the bending quality of cold bending pipe in the process of development, test and application of pipe bending machine, analyzed the common defects of cold bending pipe and put forward control measures for reference.

Each cold bend is made by a number of 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. The deformation of the steel tube in the process of Hangzhou bend processing occurs on the upper die. The upper die plays the role of the mould. The curve is determined according to the critical value of plastic deformation of the steel tube with different specifications and different materials. Lu with different steel pipe corresponding to different upper die.

According to the causes of wrinkles, we controlled them from two aspects: on the one hand, the inner tube should not be placed on the side close to the front fixture in the bending process, but should be placed on the side close to the bending cylinder of the lower die, and the rear of the inner tube should exceed the rear of the upper tire by about 150mm. At the same time, during the first 3 bending, the lift of the bending cylinder should not be too large, and in the later process, the lift of the bending cylinder should be gradually increased until the steel tube touches the high point of the upper tire arc, which can make the steel tube smooth transition in the bending process and ensure that the steel tube does not occur instability deformation. On the other hand, adjust the inner tube before bending the steel tube. When bending a tube, the inner tube must be in a self-locking position, and the inner wall of the steel tube can be bent behind. By taking the above measures, we can ensure that the steel pipe does not appear fold.

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 trolley, and rigidly connected the inner tube and the trolley with a benchmark. 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 bulging tight structure, 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 vertical degree of the inner tube, we used the position indicator, fixed it on the connecting benchmark, and marked the position mark at the tube mouth. When the position indicator deflected, the inner tube was withdrawn in time and manually corrected.