Automatic pipe end pressing machine

The automatic tube end forming machine is a specialized machining solution designed to press, crimp, and reduce the ends of aluminum alloy rectangular tubes, serving subsequent assembly and welding processes in the production line. The machine uses a hydraulic pressing system combined with dedicated fixtures to accurately position and securely hold the tube during the forming process, ensuring consistent and stable tube end shapes. With its compact design, simple operation, and high level of automation, the machine is suitable for production lines requiring stable productivity and consistent product quality. In particular, the machine can process rectangular tubes with dimensions of 22 × 11.5 mm and a length of up to 500 mm, with a forming cycle of approximately 4 seconds per tube end, making it well suited for batch and mass production. In the following article, let's explore the automatic tube end forming machine in detail with CNC VINA.

Technical specifications of the automatic tube end pressing machine

Structure of the automatic tube end pressing machine

The automatic tube end forming machine is designed with a robust structure, a powerful hydraulic system, and an automatic control cabinet to ensure stable, precise, and safe tube end forming operations in an industrial production environment. The machine can be designed and customized according to the tube dimensions, forming force, cylinder stroke, and specific processing requirements of each product.

1. Machine frame structure

- The machine frame is manufactured from a heavy-duty steel structural frame, precisely fabricated and securely welded to ensure high rigidity and stability during the forming process. The frame surface is coated with epoxy paint to improve corrosion resistance and protect the machine against oil, dust, and other factors in the industrial production environment.

- The machine worktable is manufactured from steel plate with a thickness suitable for the machine load and forming force. The installation positions of the hydraulic unit, forming assembly, jig, and fixtures are properly arranged to ensure stability and facilitate maintenance and component replacement. The machine structure is designed according to the required forming force, helping minimize vibration and deformation during operation, thereby maintaining forming accuracy and product consistency.

2. Integrated hydraulic power unit

- The hydraulic power unit is the main system responsible for generating and supplying the forming force to the machine. The system includes a hydraulic oil tank, hydraulic pump, control valves, hydraulic piping, and other related hydraulic components.

- Hydraulic oil is stored in the tank and pumped into the system to generate pressure, which then transmits hydraulic energy to the hydraulic cylinder to perform the forming movement.

- The system is designed with a cylinder working pressure of up to 80 kg/cm², depending on the machine configuration and forming force requirements of each machine model.

- The hydraulic power unit can be designed to control the forming speed and cylinder stroke, ensuring a stable tube end forming process, minimizing vibration and sudden movements, and maintaining consistent results between production cycles.

3. Electrical control cabinet and control system

- The electrical control cabinet is the central control unit for the entire machine. It contains electrical components, protection devices, and a PLC controller to control the machine's operating sequence. The control system can use PLCs and standard electrical components from reputable brands such as: Mitsubishi, Keyence, Siemens, Panasonic, Delta, Omron, etc.

- The PLC controls the machine's operating sequence, including tube clamping, activation of the forming cycle, cylinder control, completion of the stroke, and return of the mechanism to its initial position.

- Depending on requirements, the machine can be integrated with an HMI screen, allowing operators to easily set parameters, select operating modes, monitor equipment status, and check warning signals. The electrical system can also incorporate protection and warning functions to enhance operational safety, reduce the risk of incorrect operation, and support machine inspection and maintenance.

4. Adjustable machine feet and mobility system

- The machine is equipped with adjustable feet, allowing operators to easily adjust the machine height and level the equipment during installation in the factory. The adjustable feet help keep the machine stable on the floor and allow adjustment when the floor surface is not completely level. Proper machine leveling helps minimize vibration during operation and ensures the stability of the forming assembly and fixtures.

- Casters can be provided as an optional feature for factories that need to change the machine location or rearrange the production line.

5. Operating controls and safety devices

- The machine is equipped with multiple control methods to meet actual operating requirements. The Foot Switch allows the operator to activate the forming cycle using a foot pedal, allowing both hands to focus on positioning and holding the product correctly before starting the cycle. In addition, the machine can be equipped with a two-hand control button system. The operator must press both buttons simultaneously to activate the forming cycle, helping prevent the operator's hands from entering the hazardous area while the forming mechanism is moving.

- The combination of appropriate control devices and safety mechanisms helps improve operational safety, especially for high-force hydraulic forming applications. Depending on the safety requirements of each production line, the machine can be additionally equipped with devices such as an emergency stop button, position sensors, safety sensors, or guards for the forming area.

6. Jig and tube clamping fixture assembly

- The jig/fixture assembly is responsible for positioning and securely holding the tube throughout the forming process. This is an important component that directly affects the accuracy and consistency of the finished product.

- The jig and fixtures are designed according to the shape, dimensions, and processing requirements of each type of tube. Contact and clamping components can be manufactured from SKD steel to ensure hardness, load-bearing capacity, and durability during operation.

- The fixture ensures that the tube is correctly positioned before forming, minimizing unwanted movement, rotation, or deformation during the machining process.

- For products with multiple sizes or different product models, the jig assembly can be designed with a quick-change or adjustable configuration, helping reduce product changeover time and improve production efficiency.

7. Customization according to requirements

- The tube end forming machine can be designed and customized according to each product and the customer's production process. Parameters such as forming force, cylinder stroke, forming speed, machine table dimensions, jig configuration, workpiece feeding method, and control mode can be adjusted to meet actual requirements.

- In addition to manual operation, the machine can be integrated into an automated production line and connected with workpiece feeding equipment, robots, or subsequent machining processes to create a continuous and synchronized production process.

- With its robust structure, stable hydraulic system, flexible PLC control, and product-specific jig design, the tube end forming machine is suitable for tube pressing, forming, and end forming applications in industrial production, particularly in production lines requiring high stability and continuous operation.

Automatic tube end pressing machine operating guide

The automatic tube end pressing machine must be operated according to the proper procedure to ensure safety, accuracy, and stability during the machining process. The basic operating procedure includes machine inspection, workpiece loading, performing the forming cycle, product inspection, and equipment maintenance after use.

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Step 1: Machine inspection

• Check the machine structure, hydraulic system, and electrical system.
• Check the hydraulic fluid and refill it if necessary.
• Thoroughly clean all machine components.

Step 2: Workpiece loading

• Place the alloy tube to be formed in the correct position on the machine.
• Adjust the height of the clamping head according to the tube length.
• Tighten the clamping head securely to hold the tube firmly in place.

Step 3: Machine operation

• Press the Start button to operate the machine.
• The machine will automatically form the tube end according to the preset parameters.
• Monitor the tube end forming process to ensure that it is carried out correctly.

Step 4: Product inspection

• After the forming process is completed, press the Stop button to stop the machine.
• Check the dimensions and shape of the formed tube end.
• If the product meets the requirements, remove the tube and store it properly.
• If the product does not meet the requirements, adjust the parameters and perform the forming process again.

Step 5: Machine maintenance

• Clean the machine after each operating shift.
• Regularly inspect and maintain the machine components.
• Replace any damaged components if necessary.
• Store the machine in a clean and dry environment.

Tube end forming machines in the machinery and equipment manufacturing industry

The machinery and equipment manufacturing industry also widely uses tube end forming machines for various applications, such as:

• Forming the ends of steam pipes and water pipes used in pressure equipment and boilers. This is one of the most common applications for forming hydraulic hoses, allowing hoses, fittings, and couplings to be securely crimped together to create a complete hydraulic hose assembly.
• Forming the ends of oil, fuel, and pneumatic air hoses used in industrial machinery.
• Forming the ends of fluid transfer pipes and exhaust pipes used in production lines.
• Forming the ends of cooling pipes and liquid circulation pipes used in various equipment.
• Forming joints, fittings, and connecting pipes between different components and machine assemblies.

The automatic tube end forming machine automates the process of reducing and forming tube ends, helping shorten machining time, reduce manual operations, and improve product consistency. The hydraulic forming system combined with high-hardness SKD steel fixtures ensures a stable forming process, while the control system and safety buttons support convenient and safer operation. With its compact design, easy installation in the factory, and configurable structure according to product characteristics, the machine is a suitable solution for mechanical engineering companies, tube processing manufacturers, and component manufacturers looking to automate the tube end forming process. CNC VINA can design and manufacture machines according to the tube dimensions, production volume, and actual processing requirements of each production line.

Customers who are interested in tube end forming machines, servo presses and hydraulic presses for electronic assembly, mechanical engineering, automotive, and motorcycle industries, please contact us:

VIETNAM CNC & TECHNOLOGY APPLICATION JOINT STOCK COMPANY

Factory: Song Cung Industrial Site, Dong Thap Commune, Dan Phuong District, City, Hanoi Vietnam

Phone: +84.916 63 9355 / +84.915 74 4664

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