A press brake is a type of machine used for bending sheet metal plate. It forms predetermined bends by clamping the workpiece between a matching top tool and bottom die.
Typically, two C-frames form the sides of the press brake, connected to a table at the bottom and on a movable beam at the top. The bottom tool is mounted on the table, with the top tool mounted on the upper beam.
Press brakes often include multi-axis computer-controlled back gauges. They allow operators to position material correctly and sequence the bends step-by-step until completed. Optical sensors allow operators to make adjustments during the bending process. These sensors send real-time data about the bending angle in the bend cycle to machine controls that adjust process parameters.
Tech features
The press brake adopts many advanced technologies, and CNC is the one. Through CNC technology, the press brake operation does not utterly rely on manuals. Instead, the preprogramming is advanced.
This means the construction and operators can design and input the specific parameters on the computer. The machine can be operated according to these instructions. The benefits of using CNC in press brake are as follows:
- Precision improved: the CNC technology can control the bending process precisely, thus achieving accurate and consistent bending.
- Repeatability: due to the machine being operated by pre-designed programs, each bending can achieve highly consistent results, regardless of the production quantity.
- Productivity improved: the automotive operation reduces the need for human manipulation. CNC machine tools can achieve intricate bending operations with high efficiency, decreasing production time and improving productivity.
- Flexibility: CNC technology allows the users to modify and adjust the bending parameters easily to adapt to the different task requirements.
- Setting time reduced: CNC machine tool can restore and recall bending programs without manual setting, reducing the transition time between the workpieces.
- Waste reduced: high precision and repeatability mean fewer errors and wastes, thus reducing materials and costs.
The main technical parameters
| Model | Nominal pressure ( | Workbech length | Column distance | Throat depth | Slider stroke | MAX opening height | Main motor power | Overall dimension |
| （KN） | (mm) | (mm) | (mm) | (mm) | (mm) | (KW) | (mm) | |
| 40t/2200 | 400 | 2200 | 1775 | 250 | 175 | 320 | 5.5 | 2300×1500×2000 |
| 40t/2500 | 400 | 2500 | 1975 | 250 | 175 | 320 | 5.5 | 2600×1500×2000 |
| 63t/2500 | 630 | 2500 | 2095 | 250 | 175 | 360 | 5.5 | 2600×1600×2300 |
| 63t/3200 | 630 | 3200 | 2570 | 250 | 175 | 360 | 5.5 | 3300×1600×2300 |
| 80t/3200 | 800 | 3200 | 2565 | 320 | 175 | 360 | 7.5 | 3300×1700×2300 |
| 80t/4000 | 800 | 4000 | 3165 | 320 | 175 | 360 | 7.5 | 4100×1700×2300 |
| 100t/3200 | 1000 | 3200 | 2560 | 320 | 215 | 360 | 7.5 | 3300×1800×2400 |
| 100t/4000 | 1000 | 4000 | 3165 | 320 | 215 | 360 | 7.5 | 4100×1800×2500 |
| 125t/3200 | 1250 | 3200 | 2550 | 320 | 215 | 360 | 7.5 | 3250×1920×2450 |
| 125t/4000 | 1250 | 4000 | 3450 | 320 | 215 | 360 | 7.5 | 4100×1920×2500 |
| 160t/3200 | 1600 | 3200 | 2540 | 320 | 215 | 440 | 11 | 3300×1600×2600 |
| 160t/4000 | 1600 | 4000 | 3140 | 320 | 215 | 440 | 11 | 4100×2000×2600 |
| 160t/6000 | 1600 | 6000 | 4740 | 320 | 215 | 440 | 11 | 6100×2000×2600 |
| 200t/3200 | 2000 | 3200 | 2540 | 320 | 215 | 530 | 11 | 3300×2100×2800 |
| 200t/4000 | 2000 | 4000 | 3140 | 320 | 215 | 530 | 15 | 4100×2100×2900 |
| 200t/5000 | 2500 | 5000 | 3120 | 400 | 215 | 530 | 15 | 5100×2100×3000 |
| 250t/4000 | 2500 | 4000 | 3120 | 400 | 215 | 560 | 18.5 | 4100×2200×3500 |
| 250t/5000 | 2500 | 5000 | 3920 | 400 | 215 | 560 | 18.5 | 5100×2200×3500 |
| 250t/6000 | 2500 | 6000 | 4720 | 400 | 250 | 560 | 18.5 | 6100×2200×3500 |
| 300t/5000 | 3000 | 5000 | 39100 | 400 | 250 | 560 | 22 | 5100×2600×4000 |
| 300t/6000 | 3000 | 6000 | 4710 | 400 | 250 | 560 | 22 | 6100×2600×4000 |
| 300t/7000 | 3000 | 7000 | 5620 | 400 | 250 | 560 | 22 | 7100×2600×4400 |
| 350t/6000 | 3500 | 6000 | 5100 | 400 | 250 | 560 | 30 | 6100×2600×4200 |
| 350t/7000 | 3500 | 7000 | 5620 | 400 | 250 | 560 | 30 | 7100×2600×4500 |
| 400t/4000 | 4000 | 4000 | 3100 | 400 | 300 | 620 | 30 | 4100×2700×3800 |
| 400t/6000 | 4000 | 6000 | 4280 | 400 | 320 | 630 | 30 | 6100×2800×4200 |
| 500t/5000 | 5000 | 5000 | 4100 | 400 | 320 | 630 | 37 | 5100×3000×4400 |
| 500t/6000 | 5000 | 6000 | 4820 | 400 | 320 | 630 | 37 | 6100×3000×4700 |
| 500t/7000 | 5000 | 7000 | 5620 | 400 | 320 | 630 | 37 | 7100×3000×4900 |
| 600t/6000 | 6000 | 6000 | 4820 | 400 | 320 | 630 | 45 | 6100×2965×4700 |
| 600t/7000 | 6000 | 7000 | 5620 | 400 | 320 | 630 | 55 | 7100×2965×4900 |
Anti-radiation observation window
High Precision: Provides greater control over the bend angle, reducing the need for adjustments.
Reduced Springback: Minimizes springback, ensuring consistent results.
Considerations
- Higher Force Requirements: Needs more tonnage than air bending, increasing wear on the machine and tooling.
- Tooling Wear: The increased force can lead to faster wear of the punch and bottom of the die.
Application
Under the circumstance of emphasizing consistency and precision, bottom bending is preferred. It is widely applied to the industry requiring minimum difference and uniform components, such as electronics.
