Sheet Metal Bending Machine

A sheet metal bending machine is a key forming equipment in sheet metal processing, mainly used to bend sheet metal into various shapes such as V-shape, U-shape, and channel shape along a straight axis, widely applied in industries such as automotive, electrical, construction, and aerospace. The working principle of a bending machine is to clamp the sheet metal between a punch (upper die) and a die (lower die), then apply pressure through a drive system to make the sheet metal deform plastically, thus forming the required shape. According to the drive mode, bending machines can be divided into four main types: mechanical bending machines, hydraulic bending machines, electro-hydraulic servo bending machines, and electric bending machines, each with its own characteristics and applicable scenarios.

Mechanical bending machines adopt a flywheel and crankshaft drive system, featuring fast cycle speed and low maintenance requirements, suitable for mass production of thin to medium-thickness sheet metal parts such as brackets and toolboxes. Hydraulic bending machines, driven by dual hydraulic cylinders, have a sturdy structure and moderate precision, capable of handling medium to thick sheet metal (1–20mm) and widely used in general manufacturing and heavy industry. Electro-hydraulic servo bending machines combine hydraulic power with servo valve closed-loop control, offering high precision (positioning accuracy ±0.01mm, angle accuracy ±0.5°), fast response, and energy-saving performance, making them ideal for precision sheet metal processing in industries such as aerospace and medical equipment. Electric bending machines, driven entirely by servo motors, have ultra-high precision, low energy consumption, and no need for hydraulic oil, suitable for high-precision, low-noise applications such as medical devices and 3C products.

Modern sheet metal bending machines are increasingly integrated with CNC technology, enabling automatic parameter setting, path optimization, and real-time monitoring. Advanced CNC systems (such as Delem, ESA, Cybelec) allow operators to input processing parameters through touch screens, and the machine can automatically complete bending operations with high repeatability. Additionally, the selection of punches and dies is crucial for bending quality—different shapes of punches and dies can achieve different bending angles and radii, while adjustable dies can improve the versatility of the machine. With the continuous advancement of technology, bending machines are developing towards intelligence, high precision, and multi-functionality, further improving the efficiency and quality of sheet metal bending processing.