The evolution of pipe-bending machines has been driven by industrial progress. Following the rapid economic expansion of the 1990s, existing capabilities could no longer meet the growing demand for diverse metal pipe configurations across various industrial sectors. As application requirements became increasingly complex, a redesign and development of pipe-bending systems became essential.
With the successful application of die-less forming technology in curved sheet metal processing, hydraulic pipe-bending machines have adopted these principles alongside hydraulic servo-control technology. Industrial computers are used to design the arc geometry and control the bending process; the computer generates curvature data to drive the hydraulic servo system. This approach completely transforms the traditional manual or template-based methods used to fabricate curved structural components for vehicle frames, eliminating the drawbacks and limitations associated with rigid dies. It offers flexibility in bending profiles and ease of modification—specifically allowing for curvature adjustments to compensate for material spring-back—thereby significantly enhancing production efficiency and precision. Computerized control of the entire process modernizes and automates production, laying the equipment foundation for "flexible" manufacturing. By simply changing rollers, the machine can bend a variety of profiles, including rectangular and round tubes, channel steel, and angle iron.
"Full automation" has become a key trend in the machinery industry. Historically, the production of curved components for vehicle cab frames and operating mechanisms relied on manual labor using simple forging presses and hand hammers guided by pre-fabricated templates; this process was labor-intensive, inefficient, and unsuitable for mass production. Precision and cycle times were heavily dependent on the operator's skill and experience, failing to meet volume requirements. Hydraulic profile-bending machines emerged later but suffered from inherent flaws: the bending profile was entirely dictated by the die, preventing flexible curvature adjustments, and die wear necessitated frequent maintenance or replacement. More critically, the inability to compensate for material spring-back—which varies significantly—made it difficult to produce compliant curved components in a single pass.

