Tianjin Wujia CNC Machine Tool Co., Ltd. is one of the leading manufacturers and suppliers of large-tonnage electro-hydraulic servo cnc bending machine in China. Please rest assured to wholesale high quality machines at competitive price from our factory. Good service and cheap products are available.
Large-tonnage electro-hydraulic servo CNC bending machine. Frankly, in the sheet metal industry, when it comes to bending thick plates and making structural components, those small machines weighing tens of tons are just auxiliary. When it comes to engineering machinery, steel structures, or power equipment, you need a behemoth weighing 250 to 1000 tons to maintain control; otherwise, you'll feel intimidated. This large-tonnage electro-hydraulic servo CNC bending machine has a worktable that's easily over 4 meters long; it's specifically designed for this, tackling those tough challenges.
The biggest concern with large-tonnage machines is insufficient machine rigidity. This machine is welded from high-strength steel plates, such as Q355B or even Q460C, and after welding, it undergoes vibration aging or heat treatment. This step is crucial and should not be skipped; its purpose is to completely eliminate the residual stress generated during welding. If this step is neglected, and the machine body deforms or cracks under thousands of tons of pressure, all precision will be lost. To withstand the immense torque, this machine is incredibly heavy. The slider and worktable must be precision milled in one pass using a large gantry milling machine to ensure absolute flatness. Especially for models over 6 meters long, the crossbeams and columns must be specially thickened, otherwise the middle will definitely collapse.
Hydraulic System: Heavy work generates a lot of heat, so this Large-tonnage electro-hydraulic servo CNC bending machine is equipped with heavy-duty pumps, valves, and cylinders. While powerful, the key is rapid response and stable flow. The slider is pulled by cylinders on both sides simultaneously, monitored by a linear ruler, resulting in minimal left-right synchronization error; otherwise, the angle of the thick plate would definitely be skewed. To prevent the oil temperature from overheating, a dedicated independent cooling circuit is included, preventing hydraulic oil deterioration and extending the lifespan of the seals. Of course, compared to older machines, it does save a significant amount of electricity when idle or running idly.
Control and Material Support: The most annoying thing about bending thick plates is springback. This system features deflection compensation and pressure closed-loop control, automatically calculating springback to ensure precise angle pressing. The back gauge is also a specially designed heavy-duty type, robust enough to support large iron plates. Often, to prevent long plates from sagging, a front support or accompanying support device is needed. The current system is quite intelligent; for irregularly shaped parts and multi-segment bends, it tries to handle them in one clamping operation, saving us the trouble of moving those hundreds of kilograms of workpieces.
What kind of work can it do?
Basically, it handles high-value, high-accuracy items: the cab frame of construction machinery, the main shell of substations, elevator load-bearing structures, and metal components on bridges. These jobs require extremely high strength; even a slight vibration or deviation in precision could ruin tens of thousands of yuan worth of material.
Safety and Maintenance
Safety is non-negotiable. Hydraulic overload protection, emergency stop, light curtain, and mechanical locking are all essential. After all, the force of hundreds of tons is involved; an accident would be a major incident. All pipe fittings are high-pressure grade and undergo rigorous pressure testing before leaving the factory. As for routine maintenance, it's not that complicated; just keep an eye on the hydraulic oil to prevent it from getting dirty, change the filter frequently, lubricate it on time, and periodically check structural components for cracks. Just follow the procedures.
The large-tonnage electro-hydraulic servo CNC bending machine is essentially heavy-duty industrial equipment. It doesn't prioritize lightweighting or low cost; its core focus is on robustness, precision, and durability. If you plan to work long-term in heavy sheet metal, taking on high-requirement projects, this machine is your most reliable partner; you simply can't function without it.
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