News

PRESS BRAKE EXPLAIN
By SENCO Release time 2026-07-22
PRESS BRAKE EXPLAIN

Press brakes are a vital machine tool for almost any fabrication shop. These machines can bend simple and complex components. They are essential for parts manufacturing in various industries, from automotive and aircraft to housing and cabinets. Successful use of a press brake requires a comprehensive understanding of how the machine works and your role in operating it.

What Is a Press Brake, and What Does It Do?

Compared to designs from decades ago, today’s modern press brakes are highly efficient machines with some of the industry’s most advanced technology. Press brakes use punches and dies with specific forms to bend different types of metal into various shapes. They function by pressing the punch into the pre-positioned workpiece on the die.

Using different punches and dies offers the versatility of creating various shapes, giving the manufacturer greater control and maximum fabrication efficiency.

The basic operating principle of a press brake relies on tons of force accurately controlled. Different jobs require press brakes with different tonnages and bending lengths depending on the application, along with the size and type of material to be bent.

Choosing the Best Press Brake for Your Application

The most important factors when investing in a press brake are the bending length and tonnage. Knowing your application and using proper planning will help you make the right decision.
- Tonnage: The press brake’s bending force — or tonnage — determines how much pressure can be applied by the punch during a bend. Higher tonnage allows for the bending of thicker and harder metals. Lower tonnage is most appropriate for thinner metals.
- Bending length: The bending length of a press brake is the maximum possible length of a metal sheet that can be bent. A smaller 4-foot bending length press brake won’t allow you to bend a 6-foot piece of sheet metal. The metal would be too long. You want to get a press brake with a bending length slightly larger than the length of the sheets you will be bending. Be mindful that there are 2 length factors with most press brakes, the overall bed length and the bed length between.
One of the most common types of press brakes is hydraulic. Hydraulic brakes can reduce job setup time and increase efficiency when paired with CNC controls. CNC hydraulic press brakes can come in various tonnages and sizes. The tonnage and bending length required when purchasing a press brake are determined by application and what thickness and size of the metal you are bending.

Other design types include mechanical and pneumatic press brakes, with the trigger mechanisms as the most noticeable difference.

Why Tonnage and Length Are Important

Tonnage and length are crucial because a press brake has a concentrated load limit in the center of the press calculated in tons per inch. Using the incorrect tonnage may damage the press ram, the die or the working part and, in the worst cases, even ruin the machine. Additionally, some tooling types have specific tonnage limits, including straight punches, particularly when paired with V-shaped dies.

Figuring out the press brake’s load limit can be done with some fairly basic math. You multiply the number of inches between the side columns by .6 and divide the result by the tonnage.

If you had 10.6 feet between the columns on a 350-ton press brake, for example. You would take the number of inches — 10.6 x 12 = 127.2 inches — and multiply that number by .6, which is 76.32. From there, divide that number by the tonnage — 350/76.32 = 4.58. In that case, the press brake’s load limit would be 4.58 tons per inch.

If you need to bend a 5-foot sheet on that press, you should use a press power of 275 because 60 inches x 4.58 tons per inch = 275.

This scenario changes for different types of machines and different types of metal. There are also other equations to use for determining press power.

These kinds of calculations are typically available in a chart on the machine or in the operations manual. However, a press brake operator should be aware of the material they are bending and calculate the proper press power. This will avoid using too little or too much force and prevent damage to the machine.

How SENCO Machine Tools Can Help

At SENCO Machine Tools, we have an extensive inventory of press brakes to cover all your bending needs. We sell press brakes ranging from 3 to 20 feet long with press power from 44 to 440 tons. SENCO’s HBK 1000/40 CNC hydraulic press brake, a 3-foot, 44-ton model, is perfect for smaller applications. Our 20-foot, 440-ton HBK 6100/400 CNC model works well for larger bending applications. Our press brake packages include an automatic backgauge and a DELEM CNC Controller.
Read more
Precautions for Using Bending Machine
By SENCO Release time 2026-07-14

Precautions for Using SENCO Bending Machine

Ⅰ. Precautions before startup

1.Check hydraulic oil level, oil leakage, electrical wires and buttons.

2. Inspect upper and lower dies for cracks and looseness; fasten all die bolts tightly.

3.Remove scraps and sundries from worktable; no tools allowed on the table.

4. Operators must wear protective equipment; do not wear gloves when working near the sliding beam.

Ⅱ.Precautions during commissioning and idle test

1. Test the machine by manual jog mode first; do not start automatic mode directly.

2. Power off the machine when adjusting back gauge and die position.

3. Run the first workpiece at low speed; special person measures bending angle and dimensions.

4. Two operators must coordinate commands clearly: one operates machine, one holds sheet; no simultaneous button operation.

Ⅲ. Precautions during bending production

1. Never put hands into the dangerous area between sliding beam and worktable.

2. Use auxiliary fixtures for heavy sheets; do not lift sheets manually by force.

3. Press emergency stop immediately if abnormal noise or vibration occurs.

4. Do not bend sheets exceeding the rated pressure and thickness of the machine.

5. Lock and tag the machine before program modification or die replacement.

Ⅳ.Precautions after work

1. Lower the sliding beam to the lowest position; turn off oil pump and main power supply.

2. Clean oil stains and scraps on worktable and guide rails.

3. Fill in machine operation records and report faults timely.

4. Close distribution box door and tidy up the working area.

Read more
2026 Dragon ‑Boat Festival holiday Schedule
By SENCO Release time 2026-06-17

To Our Valued Customers and Partners,

Please be informed that we will observe the Dragon‑Boat Festival holiday from June 19th to 21st. Normal business will resume on June 22nd.

Your emails and messages will be replied promptly upon our return. Sorry for any inconvenience caused.

2026 Dragon ‑Boat Festival holiday Schedule

Holiday Period: June 19—21, 2026 (3 days)

Back to Work: June 22,2026

(Please note: Factory production and shipping will pause during this period. We recommend arranging stock in advance.)

️ Service & Support

Our commitment to quality service never stops. During the holiday, if you have urgent inquiries regarding machine maintenance or sales, our team remains accessible to ensure your operations run smoothly.

Contact Us Anytime:

Website: www.sencomachine.com

Call Us: +86-18655552171

Email Us: sales@sencomachine.com

Read more
CNC Bending Machine 400TX8000 Pass Inspection
By SENCO Release time 2026-04-14

SENCO is thrilled to officially announce that ourelectro-hydraulic CNC bending machine 400TX8000 has successfully completed all acceptance procedures and passed comprehensive inspection with outstanding performance, marking another major milestone in the company’s R&D and manufacturing of high-end sheet metal processing equipment.

The 400TX8000 electro-hydraulic CNC bending machine is a flagship heavy-duty sheet metal processing equipment tailored for the high-end manufacturing, construction machinery, aerospace, and shipbuilding industries. Adopting advanced electro-hydraulic servo control technology, the machine features a 400-ton bending pressure and an 8000mm working table, integrating high precision, high stability, and high efficiency into one. During the strict acceptance process, professional inspection teams conducted all-round tests on the equipment’s operational stability, dimensional processing accuracy, safety performance, and intelligent control system, covering multiple core indicators such as continuous operation, repeated positioning accuracy, and load-bearing capacity. The equipment fully met and even exceeded the industry-accepted technical standards and customer requirements, gaining unanimous recognition from the acceptance team.

Read more
Chinese New Year Holiday Announcement
By SENCO Release time 2026-06-17
To Our Valued Customers and Partners,

SENCO will be on holiday break soon.

We sincerely appreciate your strong support and kind cooperation throughout the past year. It has been a pleasure working with you.

As we step into the Year of the Horse, we look forward to moving ahead with the speed of fiber laser cutting and the strength of our heavy-duty press brakes. To help you plan your production and procurement needs, please be aware of our holiday schedule.

📅 2026 Chinese New Year Holiday Schedule

🔴 Holiday Period: Feb 14— Mar 3 , 2026

🟢 Back to Work: Mar 4,2026

(Please note: Factory production and shipping will pause during this period. We recommend arranging stock in advance.)

🛠️ Service & Support

Our commitment to quality service never stops. During the holiday, if you have urgent inquiries regarding machine maintenance or sales, our team remains accessible to ensure your operations run smoothly.

Contact Us Anytime:
- 🌐 Website: www.sencomachine.com
- 📞 Call Us: +86-18655552171
- 📧 Email Us: sales@sencomachine.com
Read more
The four main features of the CNC bending machine
By SENCO Release time 2026-01-16

In the wave of intelligent transformation in the sheet metal processing industry, the CNC bending machine, with its outstanding advantages such as accuracy, efficiency and energy conservation, has become the main equipment in fields such as chassis and cabinets, automotive parts, and home appliance manufacturing.

Its product features integrating multiple cutting-edge technologies are continuously solving the traditional processing problems and promoting the innovation of the industry's production mode. The model can complete the compensation of the same thickness of sheet metal in one operation, significantly improving the precision retention, and enabling the qualified rate of complex workpieces to exceed 99% in one forming process.

It can automatically plan the bending path, greatly reducing the requirements for manual skills, effectively alleviating the problem of personnel mobility. Different specifications of workpieces can be processed, and it is suitable for multi-variety and small-batch production scenarios. The service life exceeds 10,000 hours. These features jointly promote the CNC bending machine to become a standard equipment for modern metal processing.

Read more
How to Avoid Faults in CNC Bending Machines
By SENCO Release time 2026-01-16

The failure of CNC bending machines should mainly be prevented. Some customers purchase hydraulic bending machines but only use them without any maintenance or attention to avoid factors that may cause failure of the hydraulic bending machines. As a result, the failure rate of the hydraulic bending machines they use is relatively high. Therefore, the task for bending machine manufacturers is to mainly prevent the failure of hydraulic bending machines, so that your hydraulic bending machines can achieve the longest service life.

The failure of the hydraulic system usually occurs due to three reasons: contamination, air entering, and overheating.
1. Ensure the cleanliness of the hydraulic oil of the CNC bending machine, reduce contamination. The hydraulic oil of the CNC bending machine should be selected correctly to prevent impurities and contaminants from invading the hydraulic oil. The hydraulic oil of the CNC bending machine is not only the medium of the hydraulic system but also a lubricant.

Therefore, its cleanliness of the oil and the performance of the system, the reliability and service life of the hydraulic components have a great impact. The main reason for the contamination of the hydraulic oil of the CNC bending machine is: first, the external part of the hydraulic actuator is dirty, and impurities enter the hydraulic system; second, the oil is not filtered with a filter screen when adding oil; third, the container used is not clean; fourth, impurities enter when checking the oil level; fifth, severely worn and damaged seals cannot be replaced in time; sixth, impurities such as iron filings generated during inspection and repair are not cleaned up thoroughly; seventh, the storage of the hydraulic oil is improper, and impurities enter the oil tank, such as water. During use and maintenance, remember to pay attention to the above issues, then the occurrence of hydraulic system failures can be reduced.

2. Prevent the hydraulic oil of the CNC bending machine from mixing air, causing cavitation. The compressibility of the hydraulic oil of the CNC bending machine is very low, but the compressibility of air is high. If the hydraulic system contains a small amount of air, it will have a great impact on the system performance. The air dissolved in water will overflow in large quantities when the pressure is low, forming cavitation; if the pressure is high, the air bubbles will rapidly burst under the impact of pressure, generating explosion noise, and releasing a large amount of heat energy, causing damage to the components and heating of the oil. To prevent air from entering the hydraulic system, the following points must be achieved: first, the return oil pipe is inserted below the oil surface; second, prevent loose connections and damaged seals; third, avoid incorrect oiling methods when adding oil to the oil tank; fourth, avoid the inlet of the hydraulic pump being placed with a filter to cause high suction resistance and prevent dissolved gases from separating.

3. Prevent excessive temperature of the hydraulic oil of the CNC bending machine. The temperature of the hydraulic oil of the CNC bending machine is generally controlled between 40℃ and 80℃. If it is always above 80℃, it will cause the viscosity of the oil to be very low, leading to leakage and high temperatures of the hydraulic components, resulting in a short service life. Therefore, when choosing the radiator, all aspects of factors should be fully considered. In terms of the selection of oil viscosity, it should also be carefully considered.

High viscosity will increase the energy loss during the flow of the oil, and low viscosity will cause more leakage. Therefore, attention should be paid during use and regular inspection should be carried out to prevent excessive temperature of the hydraulic oil, and the hydraulic oil should be filtered regularly and inspected regularly to ensure the operation of the hydraulic system, and also to reduce the wear and corrosion of the hydraulic components and extend the service life of the hydraulic system. Bending machines are divided into manual bending machines, hydraulic bending machines and CNC bending machines.

Hydraulic bending machines are divided into: torsion shaft synchronous, machine-hydraulic synchronous and electro-hydraulic synchronous according to the synchronous mode. Hydraulic bending machines are divided into: upper-moving type and lower-moving type. Including the bracket, worktable and clamping plate. The worktable is placed on the bracket, and the worktable is composed of the base and the press plate.

The base is connected to the clamping plate through a hinge, and the base is composed of the shell, coil and cover plate. The coil is placed in the depression of the shell, and the top of the depression is covered with the cover plate.

Read more
How to maintain a mechanical shearing machine
By SENCO Release time 2026-03-23

Maintenance methods for shearing machines:
1. Operate strictly in accordance with the operating procedures.

2. Before each start-up, add lubricating oil at the required time, location and quantity according to the lubrication chart. The oil should be clean and free of sediment.

3. The machine must be kept clean frequently. Anti-rust oil should be applied to the unpainted parts.

4. The lubricating oil in the motor bearings should be replaced and added regularly, and the electrical components should be checked for normal operation, safety and reliability.

5. Regularly check the triangular belts, handles, knobs, and buttons for damage. Severely worn ones should be replaced promptly and spare parts should be replenished.

6. Regularly inspect and repair switches, fuses, handles, and ensure their reliable operation.

7. 10 minutes before the end of each workday, lubricate and clean the machine. Wipe it clean.

8. Non-designated personnel are strictly prohibited from operating this equipment. It must be ensured that the machine is stopped when no one is working.

Read more
How to inspect the quality of the cutting machine blade and how to adjust it
By SENCO Release time 2026-01-16

The items and requirements for inspecting the welding quality of the shearing machine blade are as follows:
1. Check the weld strength: Use a green silicon carbide grinding wheel to grind the back of a cutting tool and check the thickness of the solder layer. The thickness should be less than 0.15 millimeters. There should be no pores or insufficient solder at the bottom of the tool tip support surface, and the weld seam with insufficient solder filling should not exceed 10% of the total length of the weld seam. If there are pores, the blade will fall off during cutting.

2. Check the position of the blade in the blade slot: If the blade is misaligned or droops beyond the technical requirements, it should be re-welded. Shearing machine blade。
3. Check the welding strength: Use a wooden hammer or copper hammer to strike the blade with moderate force, or strike the blade rod with a hammer with strong force. The blade should not fall out of the blade slot as a qualified product. Check the welding strength of the blade, it is not necessary to check each one individually, and a random inspection method can be adopted.

4. Check the flatness of the blade: If there are obvious pits on the blade, it indicates that the blade has overheated and deformed. The blade should be removed and a new one should be welded.

5. Check the cracks: After cleaning the blade with kerosene, if the shearing machine blade has cracks, kerosene will penetrate into the cracks and appear black lines, which can be observed with the naked eye. Or use a 10-40 times magnifying glass for observation. Check the cracks of the blade, you can also use the color flaw detection method: Mix 65% kerosene, 30% transformer oil and 5% turpentine to form a solution, add a little safran. Place the blade part of the cutting tool in this solution for 10-15 minutes, then wash it with clean water, apply a layer of white clay (kaolin), and dry it. Observe the surface after baking. If there are cracks on the blade, the color of the solution will show on the white clay with the naked eye. Cracked blades cannot be used and need to be re-welded.

1. Remove the lower blade, clean each one separately.

2. The blade can be used on all four sides. Select the good side and install it firmly. Check the straightness in both the horizontal and vertical directions.

3. Remove the upper blade, clean each one separately. The same as above, the blade can be used on all four sides. Select the good side and install it firmly. Check the straightness in both the horizontal and vertical directions.

4. The upper blade is fixed and cannot be adjusted. We adjust the gap of the shearing machine blade by adjusting the lower blade.

5. Find the two left and right adjusting screws for widening the gap of the lower blade, they are usually at the outermost side. 6. Find the two tightening screws for advancing the lower blade and narrowing the gap, there is a locking locking nut on the top. Usually on the inner side.
7. Loosen the four bolts on the lower blade platform.

8. Manually rotate the upper blade to the appropriate position. The operator goes to the blanking area of the shearing machine to start the adjustment.

9. Use a feeler gauge to start coarse adjustment from the position where the upper and lower blades do not bite each other to 0.5 millimeters.
10. Manually rotate the upper blade to the middle position and start coarse adjustment to 0.5 millimeters.

11. Manually rotate the upper blade to the position where the upper and lower blades are not separated and the right side is not lifted, and start coarse adjustment to 0.5 millimeters.

12. Manually rotate the upper blade to the appropriate position and start fine adjustment.

13. Start fine adjustment from the position where the upper and lower blades do not bite each other with a feeler gauge to the point where three threads can enter five threads but cannot enter.

14. Start fine adjustment from the middle position of the upper blade to the position where the upper and lower blades are not separated and the right side is not lifted, and start fine adjustment to the point where three threads can enter five threads but cannot enter.

15. Start fine adjustment from the position where the upper and lower blades are not separated and the right side is not lifted to the middle position of the upper blade, and start fine adjustment to the point where three threads can enter five threads but cannot enter.

16. For new blades, fine adjustment is to the point where three threads can enter five threads but cannot enter.

17. For old blades, fine adjustment is to the point where ten threads can enter twenty threads but cannot enter. Or make appropriate adjustments according to the required thickness of the sheet metal to be cut.

18. When the shearing machine blade edge is sharp, if there are burrs on the edge of the cut sheet, the gap between the upper and lower blades can be appropriately reduced.

Read more
What applications can a CNC bending machine be used for and what precautions should be taken?
By SENCO Release time 2026-01-16

CNC bending machine molds are now widely used, so the demand for them is also very high. From the manufacturing process of molds, CNC bending machine molds are used in various stages such as forming molds, hot working molds, cold working molds, and plastic molds. The aerospace industry is the most traditional and important application field for CNC bending machine molds.

On the other hand, from its development process, from the end of the 19th century to the mid-20th century, the material of CNC bending machine molds was mainly high-speed steel; in the 1970s, people used high-pressure composition technology to form polycrystalline diamond, thus expanding the application scope of diamond CNC bending machine molds to multiple fields such as aviation, aerospace, automobiles, electronics, and stone materials. Therefore, CNC bending machine molds are very important for all industries in this field. In this industry, CNC bending machine molds are generally used to cut aircraft structural components.

For the workpieces used in the application of CNC automatic bending machines, the first important matter to consider is the parts you want to produce. Based on the parts, select a machine that can complete the processing task with the shortest worktable and the smallest tonnage.
For the application of CNC automatic bending machines, after the new machine is used for one month, check if there is any deformation at the bending points of the oil pipes. If there is any abnormality, it should be replaced. Carefully consider the brand of the material, the maximum processing thickness and length.

If the thickness of most workpieces is 16Ga (Ga is the abbreviation of GAUGE, which is a length measurement unit for diameter originated from North America and belongs to the Browne & Sharpe measurement system), the application scope of diamond CNC bending machine molds has expanded to multiple fields such as aviation, aerospace, automobiles, electronics, and stone materials. After two months of use, all connection points of the accessories should be tightened.

When tightening the parts, the electro-hydraulic CNC automatic bending machine should be in a powered-off state to ensure no pressure in the entire system. However, if there are many deep-drawing molds with bottom dies, or it should be considered to use a 160-ton machine. These are the points to pay attention to for the use of new machines. In the future, the hydraulic components should be cleaned every month, such as the base plate, valves, motors, pumps, and oil pipes. This is to prevent dirt from entering the system and not to use cleaning agents.

These structural components are generally large in volume. In the past, they were mostly made of aluminum alloy. They were initially used in the medical and jewelry fields. The larger the number, the smaller the diameter. Later, they were also used to represent thickness). The maximum length is 10 feet (3.048 meters) of low-carbon steel. Then the free bending force should not be greater than 50 tons.

Read more