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A hydraulic pipe bender is a device that uses hydraulic pressure to bend various metal pipes to specific angles. Hydraulic pipe benders work the same way as hydraulic car jacks and can perform multiple bends on the same pipe. Although they aren"t as effective as electric pipe benders, making bends using hydraulic pipe benders takes less time and effort than manual benders. This article discusses more about what hydraulic pipe benders are, their design and operation, and compares them with other pipe benders.

A hydraulic pipe bender requires less effort to bend pipe than manual pipe benders. It uses hydraulic pressure to bend pipes of different sizes and material types (e.g., copper and stainless steel). Hydraulic pipe benders use the ram bending method to bend pipes to specific angles. This method uses a bending die (Figure 2 labeled A), which controls the inside radius of the bend. The die presses the pipe against two stationary rollers (Figure 2 labeled B) to achieve the bend.

Hydraulic machines take advantage of Pascal’s principle, which states that an increase of pressure at one point in a confined space filled with incompressible fluid will lead to an equal increase at all other points. Hydraulic machines typically use water or oil as the incompressible fluid. An example of hydraulics is if two cylinders containing pistons are filled with oil and connected to one another with a pipe, any force that one piston applies to the oil will act upon the other piston.

In hydraulic systems, it"s possible to multiply the force on the second piston or cylinder in the above example based on Pascal"s principle and the pressure definition. Pressure is the force acting per unit area. Thus, with a constant pressure value, an increase of the second piston’s surface area results in an increase of force acting upon that piston. Most hydraulic systems have valves connecting cylinders and pistons to a high-pressure oil pump. Therefore, by applying a small force on the hydraulic pipe bender"s pump, a larger force is created to make bends in pipes of various sizes and materials.

Figure 3: A hydraulic pipe bender mounted on a tripod with the following components: hand pump (A), cylinder (B), frame plates (C), pivot assembly (D), dies (E).

Hand Pump: The pump (Figure 3 labeled A) supplies high-pressure oil to the entire cylinder through the release knob valve and the hydraulic hose. It has a handle that facilitates the opening and closing of the valve to release the oil as required. The pump has an oil filler screw for refilling or replacing the oil.

Cylinder: Pressure, force created in the hand pump, is transmitted to the cylinder (Figure 3 labeled B) via the hydraulic hose. Given that the cylinder has a higher surface area than the pump, the force is multiplied there, making it possible to bend pipes of various sizes and materials to the required degrees.

Pivot Assembly: This is an assembly of rollers (Figure 3 labeled D) placed between the upper and lower frame plates and secured in applicable holes with pins and snap pins. The pivot assembly allows the pipe to roll through as the bending occurs, making it possible to achieve the required bending degree.

Operate the pump slowly, monitoring the bend until achieving the desired bend angle.Don"t force the pipe to bend. If it doesn"t bend, stop, release the hydraulic pressure and remove it from the bender.

When finished, turn the hydraulic pipe bender off and retract the cylinder by slowly turning the release valve knob counterclockwise. Release the left side pivot pin and the pivot assembly.

Hydraulic pipe benders are useful for various uses, such as wall returns, handrails, roll cages, car chassis, rail elbows, furniture frames, and pipeline construction and repair. They are suitable for more robust pipes like those made of iron and steel. These machines are also ideal for producing tubes and pipes that require precision.

Readiness:Hydraulic pipe benders need a little more time to set up than manual pipe benders. Electric pipe benders vary in set up time depending on the type.

The choice of a pipe bending machine depends on budget, use, and requirements. A hydraulic pipe bender is ideal for small-scale uses, where high precision and quality don"t matter much.

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These bender and hand pump sets are for precision cold bending of thick-walled pipes (gas, water and steam pipes, non-heated black iron pipes, galvanized pipes, schedule 40 & 80) up to 900 following GB/T 3091,DIN 2440,EN 10255,BS1387 standards.

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We also have other models of pipe bending machine,such as DW50NC, DW63NC, DW75NC, DW89NC,DW100NC...PLEASE send us your requirement,we will quote accordingly.

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Pipe bending machine manufacture, pipe OD 15-168mm,hydraulic press, servo motor for feeding,bending and rotating,water cooling,simple operation.contact us.

​Heavy duty tube bender manufacture, draw and modify on the stereo pipe image on the screen.touch screen operation.Single-step debugging function. Send inquiry to us.

Cnc Pipe bender suppliers, Hydraulic controls,Tube bending, feeding and rotating by Mitsubishi servo motor.bending small stainless steel bar. Send inquiry to us.

​Hydraulic cnc tube bender manufacture, Hydraulic press, servo motor, water cooling, with touch screen. For different metal pipe. Contact us to get detail.

​Heavy duty tube bender china supplier. draw and modify on the stereo pipe image on the screen.touch screen operation.Single-step debugging function. Call us

Hydraulic cnc pipe bender factory, Hydraulic controls,Tube bending, feeding and rotating by Mitsubishi servo motor. With mandrel . contact us to get more information.

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As a metal pipe bender manufacturer, every time a customer enquired for a pipe bender, we find that many customers do not know much about the bender, and the customer Only know that he needs to buy a tube bender, but do not know the types of tube bender, so here the hippo team summarized the common pipe benders(pipe bending machines) in the Chinese market and analyzed their advantages and disadvantages, hoping you feel helpful.

A tube bending machine refers to a machine used to bend pipes and tubes regardless of their material. It can work on different metals such as stainless steel, mild steel, copper, aluminum, alloy, galvanized, iron, titanium, lead, etc, and then formed into different curves and angles.

In addition to bending “round tubes”, “square tubes”, “oval tubes” and “rectangular tubes”, the pipe bending machine can actually bend channel steel, angle iron,wire,bar,profile, etc., So it is widely used in car muffler, headrest, motorcycle chassis, exhaust pipe, industrial boiler, wheelbarrow, chair, fitness gym equipment, luggage frame, etc.

Manual pipe bender mainly has two support points and a hydraulic ejector point, the two pivot points have slotted rollers (in order to make the pipe is not easy to slip out). The apex is located in the middle of the 2 pivot points, and the apex can be changed with different dies according to the different pipe diameters, but the degree of bending must be controlled by yourself, and it is generally set by experience.

Roller pipe bending machine is a perfect one for big radius pipe and coil bending. The common ones have three rollers, seven rollers, and nine rollers.

In China, the single-chip NC-controlled pipe bending machine is also called a semi-automatic hydraulic pipe bending machine. The feeding and rotation are controlled by manual, the bending speed is controlled by multiple sets of solenoid valves to adjust the hydraulic cylinder output flow, thus reducing the cost of the machine.

CNC tube bender adopts servo multi-axis synchronous drive technology, driven by the servo systems, the feeding and rotating is controlled by servo motor, the bending axis could be controlled by a hydraulic cylinder(to save cost) or servo motor. For the pipe fittings with different bending radii, use upper and lower die switching, left and right die switching to complete the processing of the bending operation.

The CNC pipe bender produces high precision and good repeatability pipes with an automatic bending process. The loading and unloading system can be added to achieve the real sense of automation, so it is widely used in automobiles and other high-precision manufacturing industries.

Now on the Chinese market, according to the bending capacity of the pipe bender, the machine is divided into 25CNC,38CNC,50CNC,63CNC,75CNC commonly used models, and for these models, we could configure single stack die or multi-stack dies.  For example, the SB38CNC-5A-3S means single bend, 5 axes (5 servo motors controlled),3 stack bending tools bending machine.

In addition to a single bend CNC bender, factories also developed double bend CNC benders for symmetrical products. It can feed and bend automatically, which improves the precision and efficiency a lot. It can be used to bend luggage frames etc.

The CNC pipe bender and hydraulic semi-automatic pipe bending machine are essentially the same, main difference is their application and processing environment are different. CNC pipe bending machine is a high-end assembly line processing equipment. Assisted with auto loading and unloading device, it can process complex products very quickly. One worker can take care of the two pieces of equipment like this. While for complex products, if we use a semi-automatic pipe bending machine, we need to measure the feeding size and calculate the rotation angle every time,  it will take more time in production and the accuracy is not as good as that of a CNC pipe bending machine.

However, when bending a simple pipe, for example, a pipe only has one angle, or when it is bent at two angles on the same plane, we will prefer to choose a semi-auto hydraulic pipe bending machine, because the cost is lower.

Hope this article will be helpful for you to understand more of Chinese pipe bending machine, any questions, please contact our team at info@hippobender.com.