Why do rigid structures determine the bending life? Explore the lasting advantages of the Accurl integral welded body.
Sep 28, 2025
In the field of sheet metal processing, purchasing a bending machine is a long-term investment. When making a purchase, many people focus on tonnage, control systems and functions, but they overlook the most fundamental factor that determines the machine's lifespan and accuracy - the rigidity of the machine body. Just as the stability of a skyscraper depends on its foundation, the long-term performance and lifespan of a bending machine are entirely built on the "cornerstone" of the machine body's rigidity.
Today, we will delve into why rigidity is so important and how Accurl's integral welded body can offer you unparalleled and lasting advantages.
I. Challenges under Pressure: Why Rigidity Is the "Lifeline" of Bending Machines?
When the bending machine applies hundreds of tons of force to bend high-strength metals, this tremendous force also fiercely combats within the machine. If the rigidity of the machine body is insufficient, the following problems will occur, directly shortening the machine's lifespan:
1- Elastic Deformation and "arching" Effect:
Phenomenon: Under a huge load, the bed and the slider will slightly bend like a bow, causing the middle part to be more "concave" than the two ends. This is what is called "flexible deformation".
Consequence: It directly leads to a large Angle in the middle and a small Angle at both ends of the bent workpiece, forming a troublesome "boar-shaped bend", and completely losing control of the precision of long workpieces.
2- Metal Fatigue - The Invisible Structural Killer:
Phenomenon: Each time the machine is bent, it undergoes a stress cycle. A frame with insufficient rigidity is like an iron wire that has been repeatedly bent and will develop micro-cracks at stress concentration points.
Consequence: After millions of cycles, these micro-cracks gradually expand, eventually causing irreversible damage or even cracking to the fuselage structure, leading to the premature scrapping of the entire machine. This is the most fatal blow to the bending life.
3- Loosening at the connection and loss of precision:
Phenomenon: The traditional split-type fuselage (connected by high-strength bolts) may experience slight loosening or creep at the connection points under long-term impact loads.
Consequence: This loosening will disrupt the original parallelism between the slider and the worktable, resulting in inconsistent bending angles, poor verticality of the workpiece, and the need for frequent adjustments, leading to a sharp increase in maintenance costs.
Ii. Accurl's Solution: The Engineering Philosophy of Integral Welded Machine Bodies
Facing these challenges, Accurl resolutely abandoned the lower-cost split structure and fully adopted a heavy-duty integral welded body. This is not merely a piling up of materials, but a commitment to ultimate precision and lasting reliability.
Exploring Its lasting advantages
Advantage One: Resist deformation and lay the foundation for precision
Technical core: The integral body of Accurl is made of high-quality steel plates. The stress distribution is optimized through computer finite element analysis (FEA), and reinforcement design is carried out in key parts (such as the slider guide rail mounting surface and the cylinder mounting seat).
The value we bring to you: Even under the maximum load, the deformation of the fuselage is controlled within an extremely small range. This provides a perfect platform for the Accurl standard hydraulic deflection compensation system to function. The two work together to ensure extraordinary straightness and angular consistency on the entire length of the workpiece.
Advantage Two: Eliminate fatigue and achieve an extremely long service life
Technical core: The integral welded structure eliminates the stress concentration points at the split connections. The stress is evenly distributed throughout the entire sturdy frame. After the welding is completed, the machine body will undergo stress relief annealing treatment to completely release internal stress, thereby greatly enhancing the fatigue strength.
The value we bring to you: Your Accurl bending machine can withstand over ten million high-intensity working cycles while maintaining its main structure as stable as new. This means a longer service life of equipment, higher residual value of second-hand equipment, and lower depreciation cost per piece of processing.
Advantage 3: Always parallel, with lower maintenance costs
Technical core: As it is a complete rigid whole, there is no risk of loose connections. The slider and the worktable are connected through a precisely machined guide rail system and maintain permanent parallelism on a rigid reference.
The value we bring to you: You don't have to worry about the precision issues caused by the loose body. The equipment can maintain the precision standards at the factory for a long time, reducing unplanned downtime and maintenance time, making your production smoother and more predictable.
Advantage Four: A stable platform, unleashing the potential of automation
Technical core: In the automated bending unit, the robot has extremely high requirements for positioning accuracy and repeatability accuracy. The integral rigid body of Accurl provides a stable platform that remains motionless.
The value it brings to you: When you upgrade integrated robots or automatic mold changing systems in the future, the rigid body can ensure that the automation unit always operates at the highest efficiency, avoiding positioning errors or collision risks caused by minor changes in the main unit, and protecting your expensive investment in automation.
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