As a supplier of 20t bending machines, I am often asked about the safety protection devices of these machines. In this blog, I will introduce the common safety protection devices of 20t bending machines, their functions, and why they are essential for the operation of the machine. 20t Bending Machine
1. Emergency Stop Button
One of the most crucial safety protection devices on a 20t bending machine is the emergency stop button. This bright – colored, large – sized button is strategically placed within easy reach of the operator.
The function of the emergency stop button is straightforward yet vital. In case of an immediate danger, such as a sudden malfunction of the machine, an unexpected object getting caught in the bending area, or any other life – threatening situation, the operator can press this button. Once pressed, it instantly cuts off the power supply to all the moving parts of the bending machine. This stops the operation of the machine immediately, preventing potential injuries to the operator and damage to the machine.
For example, if a tool or a piece of material suddenly jams in the bending mechanism while it is in motion, pressing the emergency stop button can halt the operation before more serious consequences occur. It serves as a last – ditch effort to ensure the safety of everyone in the vicinity of the machine.
2.光幕传感器（Light Curtain Sensor）
Light curtain sensors are another important safety feature in 20t bending machines. These sensors consist of an emitter and a receiver installed on either side of the dangerous area of the bending machine, typically around the bending die.
The emitter sends out a series of infrared light beams to the receiver. As long as these light beams are uninterrupted, the machine can operate normally. However, if an object, such as a hand or a foreign body, breaks one or more of these light beams, the sensor immediately detects the interruption. It then sends a signal to the machine’s control system, which stops the movement of the bending ram or the relevant parts of the machine.
This device is extremely effective in preventing accidental contact with the dangerous bending area. For instance, during the loading or unloading of workpieces, if an operator accidentally reaches too close to the die, the light curtain sensor will detect the intrusion and stop the machine, protecting the operator from being crushed or injured.
3. Safety Door Interlock
Safety door interlocks are installed on the access doors of the 20t bending machine. These doors provide access to the internal components of the machine for maintenance, cleaning, or adjustment purposes.
The interlock mechanism ensures that the machine cannot be operated when the safety doors are open. When the door is opened, the interlock switch is triggered, and it sends a signal to the control system to disable the power supply to the moving parts of the machine. This prevents operators from accessing the dangerous internal parts of the machine while it is running.
For example, if an operator needs to clean the inside of the machine, opening the safety door will automatically stop the machine, and the machine will not start again until the door is properly closed and the interlock is re – engaged. This helps to avoid potential injuries caused by accidental contact with rotating or moving parts during maintenance work.
4. Two – Hand Control Device
A two – hand control device is designed to ensure that the operator uses both hands to initiate the bending operation. This device consists of two separate buttons or switches that must be pressed simultaneously by the operator’s two hands.
The main purpose of the two – hand control device is to keep the operator’s hands away from the dangerous bending area. When the operator presses the two buttons, the machine starts the bending process, but since both hands are occupied with pressing the buttons, they cannot be near the die or other dangerous parts of the machine during the operation.
This device reduces the risk of hand injuries, such as being pinched or crushed by the bending ram. For example, in a high – volume production environment, where operators may be prone to distractions, the two – hand control device acts as a safeguard to prevent accidental hand – related injuries.
5. Overload Protection Device
The overload protection device is an important safety feature for protecting the 20t bending machine itself. It monitors the load applied to the machine during the bending process.
When the bending force exerted on the workpiece exceeds the rated capacity of the machine, the overload protection device is triggered. It can work in different ways. Some overload protection devices use pressure sensors to detect the excessive hydraulic pressure in the system (if it is a hydraulic bending machine). Once the pressure exceeds the set limit, the device will stop the operation of the hydraulic pump and prevent further increase in pressure.
This protection is essential because overloading the bending machine can cause serious damage to the machine’s components, such as the bending ram, the hydraulic cylinders, and the frame. It can also lead to premature wear and tear of the machine, reducing its service life. For example, if an operator tries to bend a workpiece that is too thick or too hard for the machine’s capacity, the overload protection device will stop the operation before any significant damage occurs.
6. Protective Guards
Protective guards are physical barriers installed around the 20t bending machine. These guards are made of materials such as metal sheets or plexiglass and are designed to enclose the dangerous parts of the machine, such as the bending dies, the hydraulic cylinders, and the mechanical transmission parts.
The function of protective guards is to prevent operators and bystanders from accidentally coming into contact with the moving or rotating parts of the machine. They also protect against flying debris that may occur during the bending process, such as chips or fragments of the workpiece.
For example, if there is a small crack in the workpiece during bending, pieces may break off and fly out. The protective guard will catch these flying debris, protecting the people nearby from being hit. Additionally, the guards can also prevent unauthorized access to the machine’s internal parts, reducing the risk of tampering and potential accidents.
Importance of Safety Protection Devices
The safety protection devices on a 20t bending machine are not just optional features; they are essential for several reasons.
First and foremost, they protect the safety of the operators. Bending machines are powerful pieces of equipment, and the forces involved in the bending process can be extremely dangerous. Without proper safety protection devices, operators are at a high risk of serious injuries, such as amputations, fractures, and crush injuries.
Secondly, these devices help to protect the machine itself. By preventing overloading and accidental damage, the safety devices can extend the service life of the bending machine, reducing maintenance costs and downtime.
Finally, safety protection devices are often required by law and industry regulations. Compliance with these regulations is necessary for the legal operation of the machine in the workplace. Failure to have proper safety devices can result in fines and legal liabilities for the company.
Conclusion
In conclusion, a 20t bending machine is equipped with a variety of safety protection devices, including emergency stop buttons, light curtain sensors, safety door interlocks, two – hand control devices, overload protection devices, and protective guards. Each of these devices plays a crucial role in ensuring the safety of the operator, protecting the machine from damage, and complying with safety regulations.
As a supplier of 20t bending machines, we are committed to providing high – quality machines with the best – in – class safety protection devices. Our machines are designed not only to be efficient and reliable but also to prioritize the safety of our customers.
CNC End Milling Machine If you are interested in purchasing a 20t bending machine or have any questions about our products, please feel free to contact us. Our team of experts is ready to assist you with all your bending machine needs and provide you with detailed information about our product’s safety features.
References
- General safety standards for metalworking machinery established by national and international regulatory bodies.
- Manufacturer’s manuals of 20t bending machines regarding safety device functions and maintenance.
Jinan Dezhong Machinery Co., Ltd.
As one of the most professional 20t bending machine manufacturers and suppliers in China, our products have good reputation in the market. Please rest assured to buy advanced 20t bending machine for sale here from our factory. Quality products and reasonable price are available.
Address: No. 1, Industrial Park, South of Zhengjiadian Village, Meilihu Street, Huaiyin District, Jinan City, Shandong Province
E-mail: abk7@bendingcnc.com
WebSite: https://www.jndzbending.com/
