Nous sommes responsables de la construction-----nous sommes responsables de la fabrication-----nous sommes responsables de la formation
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.) est un fabricant chinois de cintreuses de panneaux CNC et de presses à poinçonner à tourelle, fondé en 2006 à Qingdao, en Chine. Tous les équipements décrits ici sont fabriqués au sein même de l'usine de STON CNC, d'une superficie de 20 000 m², depuis la coulée et le traitement thermique jusqu'à l'usinage, l'assemblage et le contrôle qualité. Les machines sont certifiées ISO 9001 et portent le marquage CE conformément à la directive Machines 2006/42/CE ; elles sont exportées vers plus de 80 pays. Consulter les certifications et les brevets →
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.
| Paramètres | Value | Remarques |
|---|---|---|
| Raw material | Cold-rolled sheet, galvanised sheet, stainless steel | Aluminium on request |
| Sheet thickness | 0,5 à 2,0 mm | Stainless typically ≤1.5 mm |
| Largeur de la bobine | 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 | — |
| Alimentation électrique | 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.
L'évaluation des risques suit EN ISO 12100; les fonctions de commande liées à la sécurité, telles que l'interruption par barrière lumineuse et l'arrêt d'urgence, sont définies pour EN ISO 13849-1. Les presses plieuses hydrauliques fournies dans l'UE sont fabriquées conformément à EN 12622. Les machines mises sur le marché de l'UE portent le marquage CE conformément à Directive 2006/42/CE relative aux machines accompagné du dossier technique correspondant. Le système de gestion de la qualité est certifié selon ISO 9001, et les tolérances d'usinage des pièces structurelles sont les suivantes : 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.
Sur les machines, cela se traduit par un blindage arrière entièrement fermé, des capots de protection sur toutes les pièces mobiles saillantes, des barrières laser qui arrêtent le mouvement en cas d'intrusion dans la zone protégée, une protection contre la surcharge sur les poinçonneuses à tourelle, ainsi qu'un système de détection de charge décalée à grille et règle sur les plieuses de tôles.
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 | |
|---|---|---|---|
| Best for | 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 | Moderate | High — buffer stock required |
| Response to a design change | Program change, coil width permitting | Program change | Supplier lead time |
| Floor space | Largest footprint | Moderate | Smallest |
| Capital required | Highest | Moderate | Lowest |
| Suits thickness above 2 mm | Non | Bending limited, punching capable | Supplier dependent |
| Est-ce que STON le fournit ? | Oui | Oui | 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.
Les figures ci-dessous illustrent l'orientation et le mécanisme de cette modification. Les résultats réels dépendent de la composition de vos pièces, de la taille des lots et de l'organisation des équipes ; nous les simulons en fonction de vos propres plans avant de vous soumettre un devis.
| Article | 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 |
Logique de retour sur investissement que nous appliquons avec nos clients : (gain annuel en main-d'œuvre + réduction des retouches et des rebuts + production commercialisable supplémentaire) ÷ coût de l'équipement installé. Nous calculons ce chiffre à partir de vos données réelles, plutôt que de publier un chiffre global qui ne correspondrait pas à votre usine.
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.
Voir la série 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.
Voir le type de bras de presse →
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.
View truss system →
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.
Voir l'unité laser →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.
Les caractéristiques techniques figurant sur cette page ont été vérifiées par rapport à la documentation technique de STON le 4 août 2026. Les limites de formage sont confirmées par rapport à vos propres plans avant l'établissement du devis. Publié le 4 août 2026 · Dernière mise à jour le 4 août 2026 · Révisé par Vicky Xu, responsable des ventes à l'international.
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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