Somos responsables de la construcción-----somos responsables de la fabricación-----somos responsables de la formación
Sometimes. Not always. Here are the signals that say yes, the part types that say no, and the staged path that avoids betting a whole shop on one machine.
A CNC panel bender replaces a press brake when a large share of your output is flat panels folded on all four sides, in 0.5 to 2.0 mm, under 2800 mm long, repeated many times. On those parts it clamps the blank once and folds every side without the operator lifting or rotating anything, which removes the second operator, the handling damage and most of the angle drift at the same time.
It does not replace a press brake for parts above 2.0 mm cold-rolled steel or 1.2 mm stainless, panels longer than 2800 mm, small brackets below roughly 140 × 190 mm four-sided inner size, non-four-sided geometry, or one-off prototypes where programming time exceeds bending time. Almost every factory that installs a panel bender keeps at least one press brake — the machines are complementary, and any supplier telling you otherwise is selling, not engineering.
STON CNC (Qingdao Ston Mechanical Technology Co., Ltd.) es un fabricante chino de dobladoras de paneles CNC y punzonadoras de torreta, fundado en 2006 en Qingdao, China. Todo el equipo aquí descrito se fabrica en la planta propia de STON CNC, de 20 000 m², desde la fundición y el tratamiento térmico hasta el mecanizado, el ensamblaje y la inspección. Las máquinas cuentan con la certificación de calidad ISO 9001 y el marcado CE conforme a la Directiva de Maquinaria 2006/42/CE, y se exportan a más de 80 países. Ver certificaciones y patentes →
Count how many of these are true in your shop today. Five or more and the case is usually clear before any spreadsheet is opened. Two or fewer and you should be buying a better press brake instead.
Everyone quotes bends per minute. In practice the saving comes from headcount: a four-sided panel that occupies two operators on a press brake occupies one on a panel bender, and none once automatic loading is fitted. Across three shifts that is the single largest line on the payback calculation.
Press-brake angle accuracy depends on the operator, the crowning setting and how tired the shift is. A panel bender runs a closed-loop servo system with rapid compensation adjustment, holding roughly ±0.5°/m across a batch. The saving shows up as less assembly rework, not as a faster bend.
Every manual lift on pre-painted or stainless sheet is a scrap risk, and scrap on a coated panel costs the full material and paint value. Vacuum pick-up moves the blank without touching the visible face, which is why furniture and elevator shops often justify the machine on scrap alone.
The failure mode we see most often is a factory buying one large machine, moving everything onto it, and discovering that a third of its parts do not fit the forming window. Stage it instead.
This section exists because the most expensive mistake in this decision is discovering the limits after delivery. Check your part list against every row.
| Constraint | Dobladora de paneles | Prensadora plegadora | What to do |
|---|---|---|---|
| Acero laminado en frío | ≤1.5 mm welded / ≤2.0 mm cast frame | Set by tonnage, up to 320 t | Above 2.0 mm stays on the brake |
| Acero inoxidable | ≤1.0 mm welded / ≤1.2 mm cast frame | Set by tonnage and tooling | 1.5 mm stainless stays on the brake |
| Aluminio | ≤2.5 mm | Set by tonnage | — |
| Maximum length | 2800 mm | 4100 mm | Longer panels stay on the brake |
| Minimum four-sided inner size | aprox. 140 × 190 mm | Sin límite práctico | Small brackets stay on the brake |
| Altura mínima de flexión | 5 mm | Dependiente de la herramienta | — |
| Non-four-sided geometry | Limitado | Any bend line | Odd geometry stays on the brake |
| One-off prototypes | Programming time exceeds bending time | Faster to set up | Prototypes stay on the brake |
| Roll-formed profiles | Not possible | Not possible | Different process, different supplier |
| Deep-drawn parts | Not possible | Not possible | Press tooling, different supplier |
Flat panels folded on all four sides, 0.5–2.0 mm, under 2800 mm, repeated across many variants. Cabinet doors, locker bodies, drawer boxes, elevator panels, rack doors and appliance panels all sit here.
Thick plate, very long panels, small brackets, non-four-sided geometry, prototypes, roll-formed profiles and deep-drawn parts. If most of your work looks like this, buy a better press brake instead — we sell those too.
Every factory that installs a panel bender keeps at least one press brake. The right question is not whether to keep one, but how many you can release to other work once the volume parts move across.
A continuación se presenta la evaluación de riesgos EN ISO 12100; las funciones de control relacionadas con la seguridad, como la interrupción de la cortina óptica y la parada de emergencia, se especifican para EN ISO 13849-1. Las prensas plegadoras hidráulicas que se importan a la UE se fabrican de acuerdo con EN 12622. Las máquinas comercializadas en el mercado de la UE llevan el marcado CE conforme a Directiva sobre maquinaria 2006/42/CE junto con el expediente técnico correspondiente. La gestión de la calidad cuenta con la certificación de ISO 9001, y a continuación se indican las tolerancias estructurales de las piezas mecanizadas ISO 2768. Las prensas plegadoras hidráulicas que se importan a la UE se fabrican de acuerdo con EN 12622. Both machine types are supplied with laser guarding, and safety-related control functions are specified to EN ISO 13849-1 so that an unattended cell can be signed off rather than fenced off as an afterthought.
En las máquinas, esto implica una valla trasera completamente cerrada, cubiertas protectoras en todas las partes móviles que sobresalen, sistemas de protección con láser que detienen el movimiento cuando se traspasa la zona protegida, protección contra sobrecarga en las punzonadoras de torreta y detección de carga desalineada mediante rejilla y regla en las dobladoras de paneles.
Three forming processes, three different jobs. Most shops that get this right end up running two of the three, not one.
| Plegadora de paneles CNC | La plegadora CNC | Máquina flexible para doblar bordes | |
|---|---|---|---|
| Geometría de la pieza | Paneles planos doblados por los cuatro lados | Cualquier línea curva, cualquier secuencia | Long panels, dead edge, arc, offset |
| Ventana de espesor | 0.5–2.0 mm CRS | Capacidad de la máquina de hasta 320 t | 0,5–2,0 mm |
| Maximum length | 2800 mm | 4100 mm | 2000 mm |
| Maximum bending height | 170 / 300 / 400 mm | Dependiente de la herramienta | 100 mm |
| Operadores | 1, o 0 con carga automática | 1–2 depending on panel size | 1, o 0 con carga automática |
| Cambio entre variantes | Resumen del programa, actas | Cambio de herramienta y reinicio del medidor | Resumen del programa, actas |
| Tamaño de lote económico | Medium to very high, high mix | De una sola vez a medio | Medium to very high |
| Dependencia de habilidades | Low, program-driven | High, experienced operator | Low, program-driven |
| ¿Lo suministra STON? | Sí | Sí | Sí |
Roll forming and deep drawing are separate processes that neither machine performs. If a meaningful share of your parts are constant-section profiles or drawn shells, that capacity comes from a different supplier and we will say so at drawing review rather than after the order.
Las figuras a continuación describen la dirección y el mecanismo del cambio. Los resultados reales dependen de su combinación de piezas, el tamaño del lote y el horario de trabajo; los simulamos según sus propios planos antes de presentar la cotización.
| Artículo | Solo prensas plegadoras | Panel bender cell |
|---|---|---|
| Operadores en la estación de doblado | 2 por máquina en paneles grandes | 1, o sin supervisión con carga automática |
| Manipulación por panel de cuatro lados | 4 levantamientos y rotaciones | 1 carga, la máquina se encarga del resto |
| Ciclo de flexión | Al ritmo del operador | 0,2 s por flexión, más de 5 000 flexiones al día (cifras publicadas por STON) |
| Cambio entre variantes | Cambio de herramientas, reinicio de medidores, verificación del primer artículo | Recuperación de programas y ajuste rápido de la compensación |
| Consistencia del ángulo en todo un lote | Operator and shift dependent | Closed-loop servo, approx. ±0.5°/m |
| Surface damage on coated sheet | Riesgo en cada levantamiento manual | Vacuum pick-up, no contact with the visible face |
| Dependencia de habilidades | Se busca operador de frenos con experiencia | Capacitación más breve para los operadores, basada en programas |
| Turno de noche | Requires a full crew | Runs unattended with loading and stacking |
| Parts it cannot do | Very few | Thick, long, small, odd-geometry, prototypes |
La fórmula de recuperación de la inversión que utilizamos con los clientes: (mano de obra liberada anualmente + reducción de la reelaboración y los desechos + producción vendible adicional) ÷ costo del equipo instalado. Calculamos esto con tus cifras reales, en lugar de publicar una cifra general que no se ajustaría a tu planta.
Press arm and suction cup types, models A to D+ from 1000 to 2800 mm forming length. Full-electric servo closed-loop control, rapid compensation adjustment, cast or welded frames, ground lead screws with imported bearings.
Ver el tipo de brazo de prensa →
For the parts a panel bender should not attempt: thick plate, long panels, brackets and prototypes. Direct-drive servo, mechanical crowning compensation, high-precision grating ruler, multi-axis CNC back gauge.
Ver la serie PBE →
Added so the bender is never waiting for blanks. Punching, louvring, embossing and rib forming in one clamping, ±0.1 mm accuracy, turret speed to 40 rpm, brush and steel-ball composite table.
Ver la serie SF →
Native interface on every panel bender, compatible with most robotic arm and gantry brands. This is the step that converts a one-operator cell into an unattended one.
Ver sistema de vigas →
Where parts need dead edges, arc returns or offsets, or where panels are long and shallow. Up to 25 concurrent servo axes, 42CrMo forged blank holder, minimum bending height 4 mm.
Ver máquina plegadora →
63 t to 320 t, 1500 to 4100 mm. DELEM or ESA control, mechanical compensation, laser protection device. The machine that keeps your thick and long parts moving after the upgrade.
View PBS series →Founded in 2006 and headquartered in Qingdao, one hour from major export ports and the airport. Casting, heat treatment, machining, welding, assembly and inspection all happen inside our own 20,000㎡ factory. That is why a configuration change for a staged bending upgrade does not become a six-month subcontracting problem.
An upgrade is a change to how your shop works, not just a delivery. Commissioning, operator retraining and the first month of programming support are where most of the risk actually sits.
Las especificaciones de esta página se verificaron con la documentación técnica de STON el 4 de agosto de 2026. Los límites de conformado se confirman con base en sus propios planos antes de emitir la cotización. Publicado el 4 de agosto de 2026 · Última actualización: 4 de agosto de 2026 · Revisado por Vicky Xu, jefa de ventas internacionales.
Add your most awkward part as a fourth. We will come back within 24 hours with which parts belong on a panel bender, which should stay on a press brake, and what the cell would look like.
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Tanto si está actualizando una línea existente como si está iniciando un nuevo proyecto, STON personalizará una solución CNC para su producción.
