Somos responsables de la construcción-----somos responsables de la fabricación-----somos responsables de la formación
Panel benders form stainless to 1.2 mm at full bend length. That covers most cabinet and panel work, and none of the heavy worktop work. Here is exactly where the line falls.
A STON cast-iron frame panel bender forms stainless steel up to 1.2 mm at full bending length; a welded frame reaches 1.0 mm. That is the honest number, and it is lower than for cold-rolled steel because stainless work-hardens and springs back harder. It matters because stainless product specifications routinely sit at 1.5 mm and above — commercial worktops in particular.
Inside the window, a panel bender is excellent: cabinet doors, side panels, splash backs, shelf panels, hood panels and equipment housings in 0.8 to 1.2 mm are exactly the four-sided folded geometry it is built for, with the added benefit that vacuum pick-up never drags a brushed or mirror finish across a back gauge. Outside the window — 1.5 mm and thicker worktops, heavy frames, and deep-drawn sink bowls — the parts belong on a press brake or on press tooling, and no configuration option changes that. We identify which of your parts fall on each side of the line before quoting.
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 →
Most stainless cabinet and equipment panels are between 0.8 and 1.2 mm. The parts that fall outside are usually worktops and structural members — which is why nearly every stainless shop runs a press brake alongside.
Stainless work-hardens during forming and demands substantially more force than cold-rolled at the same gauge, which is why the panel bender limit is 1.2 mm rather than 2.0 mm. Specifications drift upwards easily — a 1.5 mm worktop looks like a small change from a 1.2 mm door, but it is on the other side of the machine boundary.
The same bend program that produces a correct angle in mild steel will under-bend stainless, and the error grows with thickness. Closed-loop servo control with rapid compensation adjustment along the bend line is what makes stainless angle repeatable across a batch, rather than something an operator re-establishes on each run.
Brushed, mirror and patterned stainless is specified by the customer and matched across a whole installation. A scratched panel is remade, not polished, at full material cost. Vacuum pick-up moves the blank in the air, protective film stays on through forming, and grain direction is controlled at the nesting stage.
For stainless work the first question is not volume — it is what proportion of your parts sit above 1.2 mm. That ratio decides the whole machine list.
This page exists because of one row. Read the stainless line, check it against your worktop specification, and bring the answer to the first call.
| Parámetro | Panel bender — cast frame | Panel bender — welded frame | Notas |
|---|---|---|---|
| Acero inoxidable | ≤1.2 mm | ≤1.0 mm | 1.5 mm and above needs a press brake |
| Acero laminado en frío | ≤2.0 mm | ≤1.5 mm | For carbon steel sub-frames |
| Aluminio | ≤2.5 mm | ≤2.5 mm | Depende de la aleación |
| Tamaño máximo de conformado | 1000 × 1000 up to 2800 × 1500 mm | Por modelo | |
| Altura de flexión | 5 mm como mínimo / 170, 300 o 400 mm como máximo | Según la configuración | |
| Tamaño interior mínimo de cuatro lados | aprox. 140 × 190 mm | Small hygienic trims may fall below | |
| Precisión angular | aprox. ±0,5°/m | Springback compensation applied | |
| Straightness | approx. 0.2 mm/m | Decides flush joints on cladding | |
| Deep-drawn sink bowls | Not possible — press tooling process, not supplied | Different supplier | |
| Servicios públicos | Trifásico, 380 V, aire a 0,6 MPa | Configurado para el voltaje de destino | |
Stainless cabinet doors, side panels, splash backs, shelf panels, hoods and equipment housings at 0.8–1.2 mm, folded on all four sides, with a finish that must not be touched.
Commercial worktops at 1.5 mm and above at full bend length, deep-drawn sink bowls, heavy structural frames, and roll-formed profiles. Three different processes, none of them a panel bender.
Worktops, heavy frame members, thick brackets and any stainless part above 1.2 mm. In stainless fabrication the press brake is not a backup machine — for many shops it carries half the product.
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. En cuanto al producto terminado, EN 10088-2 covers stainless sheet delivery conditions and surface finishes, and EN 1672-2 sets hygiene requirements for food processing machinery including cleanable surfaces and edge design. Both apply to your product rather than to the machine, but the folded edge geometry they require is produced at the forming stage.
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.
Stainless fabrication is the clearest case in sheet metal for needing more than one process. The split is decided by thickness and by whether the part is folded or drawn.
| Plegadora de paneles CNC | La plegadora CNC | Press tooling | |
|---|---|---|---|
| Stainless thickness | ≤1.2 mm at full length | Set by tonnage and tooling | Set by the press and die |
| Typical stainless parts | Doors, side panels, splash backs, housings | Worktops, frames, heavy brackets | Sink bowls, drawn shells |
| Four-sided panels | Single clamping | 4 rotations | Not applicable |
| Finish protection | Vacuum pick-up, film retained | Manual handling each bend | Die contact |
| Springback control | Closed loop plus rapid compensation | Crowning plus operator | Built into the die |
| Plazo de entrega de los moldes | Custom knives, quoted with machine | Standard tooling | Long — dedicated die |
| ¿Lo suministra STON? | Sí | Sí | No — different process |
If most of your output is 1.5 mm worktops and drawn sink bowls, a panel bender is the wrong first purchase and we will say so. The right conversation in that case is about press brake capacity, not bending automation.
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 |
|---|---|---|
| Contact with the finish | Dragged across the back gauge each bend | None — vacuum pick-up |
| Scrap from surface damage | The largest scrap category in stainless | Largely eliminated |
| Springback consistency | Re-established by the operator each run | Stored compensation values |
| Operators per large panel | 2 | 1, or unattended with loading |
| Consistencia del ángulo en todo un lote | Desviaciones según el operador y el turno | aprox. ±0,5°/m |
| Changeover between cabinet sizes | Cambio de herramientas y reinicio de medidores | Program recall |
| Parts above 1.2 mm stainless | Handled | Stay on the press brake |
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.
Vacuum-gripped feeding for filmed and finished stainless, cast-iron frame rated to 1.2 mm stainless at full bend length. Patented 360° rotating suction feeding, grating-ruler offset-load detection, cabinet air conditioning.
Ver el tipo con ventosa →
For 1.5 mm and heavier stainless worktops, frames and brackets outside the panel bender window. 63 t to 320 t, DELEM or ESA control, mechanical compensation, high-precision grating ruler.
View PBS series →
Fiber laser blanking with smooth, burr-free cuts — essential where the cut edge stays visible on a stainless panel. Exchange table loads the next sheet while the current one is cut.
Ver unidad láser →
Dead edge, offset and arc bending for hygienic rolled and hemmed edges. Minimum folded height 4 mm, 42CrMo forged blank holder, suction feeding that keeps protective film intact.
Ver máquina plegadora →
Fixing patterns, ventilation and service cut-outs in one clamping. Brush and steel-ball composite table carries filmed stainless without scoring; stainless-steel table edging resists scratching.
Ver la serie SF →
On stainless, automation is justified by scrap as much as by labour. Native interface on every panel bender, vacuum pick-up that never touches the finished face, compatible with most robot brands.
Ver sistema de vigas →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 stainless panel cell does not become a six-month subcontracting problem.
Stainless material cost per part is high, so a machine problem becomes a scrap problem quickly. Fast diagnosis matters more here than in almost any other sheet metal sector.
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.
One drawing decides most of this conversation. Send your thickest stainless part alongside your largest panel and we will tell you within 24 hours what sits inside the 1.2 mm window and what does not.
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