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Hebei pipe fittings equipment manufacturer

Hebei pipe fittings equipment manufacturer  

Because of COVID-19 in Wuhan this year, the pipe fitting equipment manufacturer has delayed the production of the factory and the delivery time of the customer.  

Last year's custom - made pipe bender was delayed.  After the negotiation with the customer, our delivery date has been postponed.  

Our company would like to say a sincere thanks to each customer.  I also hope that the angels in white who rushed to Wuhan from all over the country would win the battle.  Come on!  

Introduces the method of cold pipe bending mold in the production process of pipe bender  

With the development of CNC machine tool industry, the use of advanced CNC bending machine tools, equipped with reliable and accurate bending machine die to achieve the bending process can greatly improve the production efficiency and ensure the quality of products.  Because the process parameters can be easily adjusted, the CNC pipe bender can accurately and stably complete straightening, round alignment, feeding, bending and other actions to ensure the bending accuracy of the control parts.  However, the quality of the bent copper pipe is more sensitive to the process parameters, so there are sufficient preliminary preparation and trial production for the requirements, especially for the bending of thin-wall copper pipe. If the process parameters of the bending machine are not properly selected, it is easy to wrinkle, resulting in scrap of parts.  How to obtain these process parameters efficiently and accurately and fully guarantee the quality of bending products is the research focus of CNC bending process.  In the winding and bending process, the position of the mandrel relative to the bending point is very important. A certain position of the mandrel relative to the bending point (the working end of the mandrel enters the bending section of the pipe) can reduce the ellipticity, but when the mandrel is too much ahead, the thinning of the pipe wall will be increased, so the position of the mandrel should be determined after 3 ~ 4 bending samples.  In addition, the characteristics that the mandrel must move back when bending the thick-walled pipe and forward when bending the thin-walled pipe should be considered.  

In practice, there are many different pipe bending processes, and there can be a variety of different die categories of automatic pipe bending machines from different angles.  In engineering, it is usually divided into cold bending and hot bending according to whether the pipe is heated or not. According to the bending, it is divided into core bending and coreless bending. Copper pipe, especially thin-walled copper pipe, is bent by cold bending method.  The cold bending method is to bend the pipe under normal temperature, because there is no heating when bending the pipe, it is more suitable for bending stainless steel pipe, aluminum pipe and copper pipe.  The commonly used cold bending methods include rolling bending, tension-winding bending, push-winding bending and pressure bending, etc. This paper mainly introduces the related problems in tension-winding bending forming of pipe fittings.  In general, the bending radius of cold bending should not be less than 1.5 times the pipe diameter.  Because the pipe has a certain elasticity, when the external force applied during bending is eliminated, the pipe will bounce back to an Angle, and the pipe bender mold must have a certain amount of bending during bending.  The size of the amount of rebound and pipe material mechanical properties, wall thickness and bending radius of the size of the general copper pipe bending rebound Angle is about 2 ~ 4.  Drawing and winding bending is to clamp the pipe on the pipe bender mold and rotate with the pipe bending mold. When the pipe is pulled over the pressing block, the pressing block will wind the pipe on the bending die, which belongs to the forming die bending process.  

2105-2103.