| The economic efficiency brought by the development of pipe bending machine
We need to use the skills of bending pipe processing in many mechanical manufacturing, so whether we have met it now? Now let's get to know each other simply from some aspects.
The large-diameter cold-formed pipe is a common pipe fitting in the construction of long-distance pipeline. It is made by the vertical hydraulic pipe bender according to the actual trend of the pipeline and the measured bending Angle. Into the 21st century, the construction of long-distance pipeline projects in China has developed rapidly, and China's landform is large and diverse, there are more mountains and hills along the pipeline, and less plains, and the demand for cold-formed pipes is quite large, but because many construction units lack experience in the production of cold-formed pipes, how to make high-quality cold-formed pipes is still in the exploration stage. As a manufacturer of pipe bending machine, in the development, test and application of pipe bending machine, we have conducted in-depth research and testing on how to guarantee the quality of cold bending pipe, analyzed the common defects of cold bending pipe and put forward control measures for everyone's advice.
Each cold bend is made through several bends. The steel pipe is placed on the bending machine, the bending machine applies bending torque to the steel pipe, so that the local steel pipe has an appropriate amount of deformation, forming a certain Angle, and reaching the bending purpose. The basic process is: the back end clamp the steel pipe, and then the fulcrum of the main oil cylinder of the front end of the lower die moves upward, so that the steel pipe bends and deforms along the middle of the upper die curve until the bending is made. In the process of bending pipe in Hangzhou, the deformation of steel pipe is generated on the upper die, which plays the role of fetal, and its curve is determined according to the critical value of plastic deformation of steel pipe with different specifications and different materials. Different steel pipes correspond to different upper dies.
According to the causes of folding, we control from two aspects: on the one hand, during the bending process, the inner tube can not be placed near the front fixture side, but should be placed near the lower die bending cylinder side, and the back of the inner tube is about 150mm beyond the back of the upper tire. At the same time, when holding the first 3 bending, the lift of the bending cylinder should not be too large, and the lift of the bending cylinder should gradually increase in the next step until the steel pipe is at the high point of the tire arc, so that the steel pipe can be gently transitional in the bending process, and the steel pipe will not be destabilized. On the other hand, the inner tube is adjusted before the bending of the steel pipe. When trying to bend a tube, the inner tube must be in a self-locking position and the bending can be held after the inner wall of the steel pipe is supported. By taking the above measures, you can ensure that the pipe does not fold.
In bending, we invented that the axial position of the inner tube is not easy to control, so we designed and made a position indicating trolley, and used a pole to hold a rigid connection between the inner tube and the trolley. When the inner tube and the center line of the upper die coincide, record the relative position of the car, a bending operation is completed when the steel tube moves to the rear axis, together with the inner tube and the car move back a working length, then loosen the inner tube expansion structure, start the inner tube motor, so that the inner tube and the car move forward until the car returns to the original calibration position. In order to control the verticality of the inner tube, we accepted the position pointer, fixed it on the adjacent pole, and marked the position mark on the tube mouth. When the position pointer deflected, the inner tube was withdrawn in real time and manual correction was carried out.
Pipe bending machine used in the industry
Due to the surge in the use of pipes in China, the pipe use market is very large, the furniture industry, sports equipment, boiler industry, automobile industry, exhaust pipe, in terms of specifications, varieties, numbers and other aspects of rapid growth, rapid improvement in skill level, basically meet the domestic market demand. These commonly make supplies, industrial and commercial pipe processing and bending machine equipment needed to basically meet the needs of the market.
Mechanical press, hydraulic press, pipe bending machine, hydraulic pipe bending machine, metal circular saw machine, pipe shrinking machine, tee machine, pipe expanding machine and other pipe processing equipment have made significant progress in processing accuracy, simple operation, skill indicators, energy saving and emission reduction, humanization and other aspects, new product development ability and market competitiveness have been greatly improved. Guided by the new process, forging equipment with special structure and special effect that meet the requirements of the new process also keeps appearing. For example, CNC pipe bending machine, pipe cutting machine, pipe bending, pipe shrinking and integrated pipeline pipe processing equipment, special material forging equipment.
At present, the pipe bending machine equipment products are complete, including hydraulic pipe bending machine, CNC pipe bending machine, automatic pipe bending machine, semi-automatic pipe bending machine, medium frequency pipe bending machine, pipe cutting machine equipment: manual pipe cutting machine, pneumatic pipe cutting machine, automatic metal circular saw machine, oil pressure pipe cutting machine. The pipe end forming machine is equipped with a pipe shrinking machine, a single head pipe shrinking machine and a pipe expanding machine. On the whole, the innovation ability of pipe fittings and equipment has a good development prospect.
Great progress has been made in the development of fully automatic pipe bending machine and mechanical equipment controlled by program. The tube end forming machine adopts CNC skills, combined with advanced switched reluctance motor skills. China has been able to manufacture laser cutting machines, hydraulic pipe bending machines. In addition, hydraulic pipe bending machine, semi-automatic pipe bending machine and other products have also been developed by a number of enterprises, and the product level has reached the satisfaction of each user.
Pipe bending machine manufacturers manufacturing requirements: the pipe bending machine is mainly for the bending of large caliber steel pipes, the need for medium frequency heating, high production efficiency. The medium frequency pipe bending machine generally accepts the cylinder or screw push, the clamp is stuck in the steel pipe, the coil is heated, the steel pipe is heated to a certain temperature, the plastic deformation is generated, and the bending is held. Through the rotating arm rotation, heating, turning, bending and forming.
The small radius (R≈D) and thin wall (t/D≈0.015) 180 elbow with uniform wall thickness can be produced by adopting this process, which is impossible to achieve by other bending processes.
If various process parameters are designed reasonably, the process can ensure that the wall thickness of each part of the bending process is always stable, that is, the wall thickness of the straight pipe blank before deformation.
By adopting this process, the bending pipe of 45°, 90°, 180° and other bending angles of the same caliber can be produced at the same horn mandrel at one time, and the production efficiency is high.
Medium frequency pipe bending machine uses: mainly used for bending nonferrous or dark metal pipes, can be applied to building materials, shipbuilding, chemical industry, metallurgy, boiler and heavy machinery manufacturing departments. The products are mainly used in the construction of circular arc steel structure, tunnel support, roof bending beam, subway engineering, aluminum doors and Windows, ceiling, cylindrical inner skeleton, balcony handrail, shower door, production line track, fitness equipment and other industries.
Medium frequency pipe bending machine can not only bend small radius pipe, but also simmer large diameter steel pipe, can simmer radius steel pipe, square steel, Angle iron, channel steel, I-steel and other profiles, used in construction, bridge and other industries. The medium frequency pipe bending machine accepts the steel pipe of continuous heating tube bending without interruption, with high precision, correct bending radius and low ellipticity of steel pipe section, which is one of the indispensable pipe bending equipment in the industry today.
Medium frequency pipe bending machine and cold pipe bending machine have their advantages and disadvantages. Medium frequency pipe bending machine is suitable for simming-making of large diameter and large wall thickness pipe, and cold pipe bending machine is suitable for simming-making of small diameter and small wall thickness pipe.
For the relevant knowledge of pipe bending machine manufacturers, welcome to pay attention to our website: http://www.fitting-equipment.com
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