Somos responsables de la construcción-----somos responsables de la fabricación-----somos responsables de la formación
One control system from the coil to the stack: uncoiling, levelling, laser blanking, punching, bending and palletising, with no manual handling in between.
A coil-to-part line takes steel in coil form and returns a finished, formed, stacked component without a person touching the material in between. The chain is uncoiling → levelling → laser blanking or turret punching → automatic bending → stacking, optionally with a robot welding station at the end. Everything runs under one control system with process interlock and data traceability.
It is worth it when three conditions hold together: your product range is reasonably standardised, your volume is continuous rather than campaign-based, and your material sits in the 0.5 to 2.0 mm window. Coil is cheaper per tonne than cut sheet, intelligent nesting from a continuous strip raises material utilisation, and the handling, shearing and work-in-progress between machines disappears. If your mix is high and your batches are small, a punch-and-bend cell fed from sheet is usually the better investment — a coil line rewards repetition, and we will say so 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 →
Coil-fed lines suit products built from a limited number of panel types repeated at high volume. Below are the part families we most often configure a line around.
Cut sheet carries a conversion cost per tonne over coil, and every shear operation creates offcut that a continuous strip does not. Combined with intelligent nesting across the strip, material utilisation is where a coil line usually recovers its cost first — and on thin gauge, material is the largest single item in the part cost.
Sheet-based production stacks material at each stage: after shearing, after cutting, after punching, before bending. Each stack is floor space, handling labour, damage risk and cash tied up. Under one control system with process interlock, the part moves from stage to stage without ever being set down.
Coil set and edge wave do not announce themselves until a panel refuses to bend straight or a door face shows a ripple. A precision leveller with 40Cr rollers on self-aligning bearings delivers a flatness of roughly ±1 mm/m² and diagonal accuracy within 1 mm over 2000 mm, so the blank arriving at the bender is already correct.
Lines are modular. Most customers start at the blanking end, where the material saving is, and extend to forming once the blank supply is stable.
These are the figures your building, your electrical contractor and your material buyer need before a layout can be drawn. Bring them to the first engineering call.
| Parámetro | Value | Notas |
|---|---|---|
| Raw material | Cold-rolled sheet, galvanised sheet, stainless steel | Aluminium on request |
| Sheet thickness | 0,5–2,0 mm | Stainless typically ≤1.5 mm |
| Anchura de la bobina | 200–1500 mm (laser line typically 1000–1500 mm) | Confirm against your product range |
| Coil weight | ≤10 T | Determines uncoiler and floor loading |
| Coil inner diameter | φ470–630 mm | Configuration dependent |
| Coil outer diameter | φ1000–1600 mm | — |
| Levelling accuracy | ±1 mm/m² | Decides whether flat faces stay flat |
| Diagonal accuracy | ≤1 mm / 2000 mm | — |
| Threading speed | 5 m/min | Coil changeover |
| Line speed | 0–12 m/min, adjustable | Leveller linear speed |
| Running height | +800 mm | Affects pit and platform design |
| Surface quality | Flat strip, no processing defects introduced | — |
| Fuente de alimentación | 3φ AC 400 V ±5%, 50 Hz ±2% | Configured to destination |
| Laser 3 kW capacity | ≤50 kVA installed, 60 kVA supply recommended | — |
| Laser 6 kW capacity | ≤100 kVA installed, 120 kVA supply recommended | — |
| Compressed air | 0.5–0.6 MPa, 0.6 m³/min | — |
Standardised panel families in 0.5–2.0 mm, produced continuously, where material cost dominates the part cost and the same sections repeat month after month.
High-mix job-shop work with small batches, thickness above 2.0 mm, panels wider than the coil range, and any product built mainly from roll-formed profiles or deep-drawn shells.
Even with a full line, keep a press brake for specials, prototypes, thick parts and anything outside the coil width. The line handles the repeatable volume; the brake handles everything else.
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. A line is a single assembly of machinery under the Machinery Directive, so risk assessment to EN ISO 12100 is carried out across the whole line rather than machine by machine, with interlocked guarding and safety functions specified to EN ISO 13849-1. Machined structural tolerances follow ISO 2768.
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.
The right answer depends almost entirely on how repetitive your product range is. A coil line rewards repetition and punishes variety.
| Coil-to-part line | Sheet-fed punch and bend cell | Outsourced blanking | |
|---|---|---|---|
| Ideal para | Standardised ranges, continuous volume | Mixed ranges, medium batches | Low volume or unstable demand |
| Material cost per part | Lowest — coil price plus nesting | Sheet price, nesting within the sheet | Highest — includes supplier margin |
| Handling between stages | None — continuous | Stacked and moved between machines | Transport, inspection, storage |
| Work in progress | Minimal | Moderado | High — buffer stock required |
| Response to a design change | Program change, coil width permitting | Program change | Supplier lead time |
| Superficie útil | Largest footprint | Moderado | Smallest |
| Capital required | Highest | Moderado | Lowest |
| Suits thickness above 2 mm | No | Bending limited, punching capable | Supplier dependent |
| ¿Lo suministra STON? | Sí | Sí | Not applicable |
If your range changes frequently or your volume arrives in campaigns rather than continuously, we will recommend a sheet-fed cell instead. A coil line bought for a variable product mix spends its life waiting for coil changeovers, which is the most expensive way to be idle.
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 | Sheet, standalone machines | Coil-to-part line |
|---|---|---|
| Material input cost | Cut sheet, conversion premium per tonne | Coil, lowest cost per tonne |
| Material utilisation | Nesting limited by sheet size | Nesting across a continuous strip |
| Handling operations | Stack and move at every stage | None between stages |
| Work in progress | Buffers at each machine | Minimal, process interlocked |
| Blank flatness at the bender | Coil set and edge wave carried through | Levelled to ±1 mm/m² before cutting |
| Secondary positioning | Re-clamped at each machine | One reference through the line |
| Labour | Operators at each machine | Line supervision, not machine tending |
| Traceability | Per machine, manually linked | Unified control, data traceability across the line |
| Flexibility on new products | High | Coil width and thickness constrained |
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.
Welded and heat-aged uncoiler body, precision leveller with 40Cr rollers on self-aligning or needle bearings, fiber laser with process parameter database and AutoCAD-compatible programming, dual-temperature water cooling.
View the blanking line →
The complete chain from coil to formed part under one control system, with process interconnection, intelligent scheduling and data traceability. Layout planned around your product structure, capacity and building.
View the full line →
Punching, trimming, forming, louvring and rib pressing with automatic loading, sheet separation, positioning, unloading and stacking. ±0.1 mm accuracy, turret speed to 40 rpm.
Ver la serie SF →
Integrated feeding, positioning, bending and unloading with angle compensation and rapid program switching. Models to 2800 mm forming length, cast or welded frames, native automation interface.
Ver el tipo de brazo de prensa →
Links the stages so material is never set down. Compatible with most robotic arm and gantry brands, with vacuum pick-up that protects coated and filmed surfaces through the whole line.
Ver sistema de vigas →
For the parts that fall outside the coil width or run in short batches. Most coil-line customers keep a sheet laser alongside so the line is never stopped for a special.
Ver unidad láser →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 full production line does not become a six-month subcontracting problem.
A line is a project, not a purchase. Layout, factory acceptance testing, shipping, installation, commissioning, training and handover are all part of the scope, and all of them are handled by STON's own engineers.
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.
A line is designed around your parts and your floor, not the other way round. Send the drawings and a building plan and we return a scoped layout, a utility list and an honest view on whether a coil line or a sheet-fed cell suits you better.
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