With the development of society, the increase in labor costs, and the continuous improvement in product requirements, many companies are also constantly raising the performance and requirements for production equipment. As an important production equipment in the forging and sheet metal industry, the CNC bending machine has also been continuously updated and developed. This article will discuss the development process of CNC bending machines and the performance and advantages of new types of CNC bending machines, specifically focusing on the oil-electric hybrid servo-driven CNC bending machine.
Oil-Electric Hybrid Servo-Driven CNC Bending Machine
Development History of Bending Machines
Common Bending Machines
Currently, the trend in the sheet metal equipment industry is towards environmental protection, energy efficiency, high efficiency, and automation. The oil-electric hybrid servo-driven CNC bending machine produced by Haas CNC perfectly embodies the superior performance in terms of energy efficiency, high efficiency, automation, and unmanned operation.
Principle of Oil-Electric Hybrid Bending Machine
Energy Saving and Environmental Protection
First, let's look at the superior performance of the oil-electric hybrid servo-driven CNC bending machine in terms of energy saving and environmental protection. The oil-electric hybrid bending machine uses the most advanced dual-servo pump control system in the world, which we will temporarily refer to as the E-Z servo drive. The E-Z servo pump replaces traditional servo proportional valves and control technologies. This drive solution saves more space, hydraulic oil, and energy consumption compared to ordinary hydraulic systems. The distribution of oil is based on demand without throttling losses, and the amount of hydraulic oil used is only about 1/3 or even 1/5 of that used in a conventional hydraulic system. It achieves true energy saving in a meaningful sense.
Power Consumption and Energy Efficiency
In addition to energy saving and environmental protection, the oil-electric hybrid servo-driven CNC bending machine exhibits remarkable superiority in terms of power consumption and energy efficiency. Compared to traditional bending system modes, the energy efficiency of the oil-electric hybrid bending machine is very high. The system only uses the energy required for clamping at each stage, and most of the pressure from the bottleneck is reduced and offset. As a result, energy consumption can be reduced by more than 75%, and in standby mode, it can be as low as around 5% of other systems. The key to this system is the 5μm position control accuracy. The use of a bidirectional gear pump reduces the overall machine noise, with noise levels not exceeding 60 decibels during high-speed operation. The sensitivity to hydraulic oil cleanliness is reduced, leading to a significant decrease in failure rates.
Power Consumption and Energy Efficiency
High Efficiency Production
The oil-electric hybrid servo-driven CNC bending machine also demonstrates impressive performance in terms of efficiency. The position accuracy of the slider or workpiece precision is not lower than that of a proportional valve control system, and in some cases, it can even be higher. Through practical testing, the repeatability of the slider's positioning accuracy is ±0.01mm, with a maximum precision of 0.005mm. While ensuring bending accuracy, it can achieve a 15% to 25% increase in idle and working speeds compared to ordinary CNC bending machines, and the return speed can be increased by over 50%. The improvement in working speed greatly enhances sheet metal productivity, thanks to its excellent hydraulic system. Even during long periods of rapid back-and-forth movement, the oil temperature remains stable, with the internal temperature not exceeding 50 degrees Celsius when the external ambient temperature is 38 degrees Celsius. This reduces the risk of oil leakage, increases stability, and improves the lifespan of the hydraulic system and cylinders.
High Efficiency Production
Unmanned Operation
The oil-electric hybrid servo-driven CNC bending machine achieves true unmanned operation in terms of automation. It can automatically select tools, calculate programs, perform automatic bending with robots, automatically detect using lasers, and provide automatic feedback and recognition of inspection results. Compared to the automatic compensation or collision prevention control on conventional bending machines, the oil-electric hybrid bending machine truly achieves unmanned operation. Its installation is also simpler, eliminating the need for complex installation procedures such as motor, oil pump, tank cleaning, and piping. This improves installation efficiency for users. It offers better economics and higher cost-effectiveness by eliminating the need for motors, oil pumps, tanks, hydraulic valve groups, complex piping installations, and manual cleaning costs for tanks. This significantly reduces power consumption and hydraulic oil usage. When perfectly combined with robots, it can achieve a truly unmanned factory, where operators only need to operate through a computer system in the office to complete the entire process of ordering, material feeding, production, transportation, and finished products. Moreover, it can work continuously for long periods.
Unmanned Operation
In summary, the oil-electric hybrid servo-driven CNC bending machine produced by Haas CNC adopts a servo motor connected to a bidirectional meshing gear pump. The flow rate of the hydraulic oil is controlled by the CNC system, which controls the speed of the servo motor to achieve synchronous movement of the two cylinders of the bending machine, enabling precise control of the slider's position and faster downward speed, resulting in higher work efficiency. The control system is directly connected to the hydraulic cylinder, eliminating the need for intermediate piping connections and allowing for oil-free piping connections in the bending machine. This simplifies installation, reduces oil leakage, and promotes energy efficiency and environmental protection. The oil-electric hybrid CNC bending machine has reached the standard of Industry 4.0 in the field of artificial intelligence in industrial manufacturing. It is a high-end CNC bending machine that will play a significant role in the bending machine family and occupy a place in the field of industrial manufacturing.
