Cabin walls, car doors and landing doors up to 2800 mm in hairline and coated stainless — formed straight, formed consistent, and never touched on the decorative face.
An elevator cabin is a set of long, flat, decorative panels that must sit flush against each other with no visible step, twist or wave — and whose surface is the product. Cabin wall panels, car door leaves, landing door leaves, ceilings and skirtings are typically 1.0 to 1.5 mm stainless steel in hairline, mirror, etched or PVD-coated finish, or coated steel, at lengths from 2000 to 2800 mm.
That drives three requirements no general-purpose machine meets well: straightness held over the full panel length so adjacent panels join flush; angle repeatability across a whole cabin set, because errors accumulate at every joint; and zero contact with the decorative face from blank to stack. The working set is a laser a fibra for blanking, a Curvatura pannelli CNC in D (2500) or D+ (2800) size with a cast-iron frame for the long panels, a macchina piegatrice a bordi flessibili where panels need dead edges or arc returns, and a pressa piegatrice for stainless above the panel bender's 1.2 mm limit.
STON CNC (Qingdao Ston Mechanical Technology Co., Ltd.) è un produttore originale cinese di piegatrici a pannello CNC e punzonatrici a torretta, fondata nel 2006 a Qingdao, Cina. Tutte le apparecchiature qui descritte sono costruite all'interno dello stabilimento di 20.000㎡ di proprietà di STON CNC, dalla fusione e dal trattamento termico fino alla lavorazione meccanica, assemblaggio e ispezione. Le macchine sono certificate ISO 9001 per la qualità e marchiate CE secondo la Direttiva Macchine 2006/42/CE, e sono esportate in oltre 80 paesi. Visualizza certificazioni e brevetti →
Elevator sheet metal splits into two families: long decorative panels where surface and straightness decide acceptance, and structural backing parts in heavier coated steel. The same cell handles both, with different frames and different tooling.
On a cabin wall set, four panels sit side by side. An angle error of half a degree on each becomes a visible step at the joint. Straightness of roughly 0.2 mm/m and angle accuracy of roughly ±0.5°/m are what keep the set assembling without shimming on site.
Hairline, mirror and PVD finishes cannot be reworked. Every drag across a back gauge, every glove mark, every bench edge is a rejected panel at full material cost. Vacuum pick-up moves the blank in the air; the decorative face is never in contact with anything.
This is where most enquiries go wrong. A panel bender handles stainless up to 1.2 mm at full bend length on a cast-iron frame. Many landing door specifications call for 1.5 mm. That part belongs on a press brake, or on a shorter bend length — and we say so before quoting, not after.
For elevator work, machine size is chosen by your longest cabin panel, not by average part size. Buying one size down is the most expensive saving in this industry.
Read the stainless row carefully. It is the single most common mismatch in elevator enquiries, and we would rather lose the order than supply a machine that cannot form your landing door leaf at full length.
| Parametro | Panel bender — cast-iron frame | Piegatrice a pannelli — telaio saldato | Note |
|---|---|---|---|
| Acciaio inox | ≤1,2 mm | ≤1,0 mm | 1.5 mm stainless needs a press brake at full length |
| Acciaio laminato a freddo / rivestito | ≤2,0 mm | ≤1,5 mm | Covers door frames and backing panels |
| Alluminio | ≤2,5 mm | ≤2,5 mm | Dipendente dalla lega |
| Dimensione massima di formatura | 2500 × 1500 mm (D) / 2800 × 1500 mm (D+) | Choose by your longest cabin panel | |
| Altezza di piegatura | 5 mm minimo / 170, 300 o 400 mm massimo | In base alla configurazione | |
| Bending angle | 0–180°, positive and negative | Dead edge on folding machine | |
| Precisione angolare | circa ±0,5°/m | Decides flush joints between panels | |
| Rettilineità | circa 0,2 mm/m | Critical over 2500 mm panels | |
| Dimensional accuracy | approx. ±0.1 mm/m | Verified at commissioning | |
| Utenze | Trifase 380 V, aria 0,6 MPa | Configurato per tensione di destinazione | |
Long decorative panels folded on all four sides in 1.0–1.2 mm stainless or coated steel, up to 2800 mm, where straightness and angle repeatability decide whether the cabin set assembles flush.
Roll-formed guide rails and door sill profiles, deep-drawn parts, and stainless above 1.2 mm at full bend length. Different processes, and in the case of rails, a different supplier entirely.
1.5 mm stainless landing door leaves, heavy structural brackets, sill and threshold parts, and low-volume special finishes. Nearly every elevator panel shop runs a press brake alongside the bender for exactly these.
Segue la valutazione dei rischi EN ISO 12100; le funzioni di controllo relative alla sicurezza come l'interruzione della barriera fotoelettrica e l'arresto di emergenza sono specificate secondo EN ISO 13849-1. Le presse piegatrici idrauliche fornite nell'UE sono costruite secondo EN 12622. Le macchine immesse sul mercato dell'UE sono contrassegnate dalla marcatura CE ai sensi della Direttiva Macchine 2006/42/CE con il relativo fascicolo tecnico. La gestione della qualità è certificata secondo ISO 9001, e le tolleranze strutturali lavorate seguono ISO 2768. For the finished lift installation, EN 81-20 e EN 81-50 set the safety and component test requirements your panels are designed against — the forming tolerances and joint consistency needed to satisfy them are established at the bending stage, not at final assembly.
Sulle macchine ciò significa recinzione posteriore completamente chiusa, coperture protettive su tutte le parti mobili sporgenti, protezione laser che arresta il movimento quando la zona protetta viene violata, protezione contro il sovraccarico di tonnellaggio sulle punzonatrici a torretta e rilevamento del carico sfalsato con righello a griglia sulle piegatrici per pannelli.
Elevator manufacturers need all three processes. The value of getting the split right is that each machine only does what it is efficient at.
| Curvatura pannelli CNC | Piegatrice CNC | Profilatura a rulli | |
|---|---|---|---|
| Geometria del pezzo | Pannelli piatti piegati su tutti e quattro i lati | Qualsiasi linea di piega, qualsiasi spessore in capacità | Constant cross-section profiles only |
| Typical elevator parts | Cabin walls, car doors, ceilings, architraves | 1.5 mm stainless door leaves, brackets, sills | Guide rails, door sill profiles, frame sections |
| Stainless capability | ≤1.2 mm at full bend length | Determinato da tonnellaggio e attrezzatura | Impostato dal set di rulli |
| Max panel length | 2800 mm | 4100 mm | Effectively unlimited |
| Straightness over 2.5 m | circa 0,2 mm/m | Depends on crowning and operator | Eccellente, ma sezione fissa |
| Decorative face protection | Raccolta sottovuoto, senza contatto | Manual handling at every step | Line-dependent |
| Changeover between cabin models | Program recall, minutes | Cambio utensile e reimpostazione calibro | Roll set change, hours to days |
| STON lo fornisce? | Sì | Sì | No — processo diverso |
Guide rails and sill profiles are roll-formed and will keep coming from a specialist supplier. What the cell above replaces is the panel work, which is where the labour, the surface scrap and the assembly rework actually sit.
Le figure seguenti descrivono la direzione e il meccanismo del cambiamento. I risultati effettivi dipendono dal mix di componenti, dalla dimensione del lotto e dal modello di turno — li modelliamo in base ai vostri disegni prima di formulare un preventivo.
| Voce | Solo presse piegatrici | Cella di piegatura a pannelli con caricamento sottovuoto |
|---|---|---|
| Operators per 2.5 m panel | 2, plus a third for turning on long sets | 1, or unattended with truss loading |
| Handling of the decorative face | Trascinato sul riscontro posteriore ad ogni piega | No contact from blank to stack |
| Angle consistency across a cabin set | Drifts between panels and shifts | Closed-loop servo, approx. ±0.5°/m |
| Straightness over the panel length | Depends on crowning and operator skill | circa 0,2 mm/m |
| Surface scrap on hairline stainless | The single largest scrap category | In gran parte eliminata |
| On-site shimming at installation | Common when joints do not sit flush | Reduced by consistent panel geometry |
| Changeover between cabin models | Tool swap, gauge reset, first-article check | Richiamo del programma e regolazione rapida della compensazione |
Logica di ritorno sull'investimento che utilizziamo con i clienti: (manodopera annuale liberata + riduzione delle rilavorazioni e degli scarti + produzione vendibile aggiuntiva) ÷ costo dell'attrezzatura installata. Lo costruiamo con i vostri dati reali piuttosto che pubblicare una cifra generica che non corrisponderrebbe al vostro stabilimento.

Cast-iron frame models to 2500 and 2800 mm forming length. Full-electric servo closed-loop control, ground lead screws with NSK bearings, grating-ruler offset-load detection, maintenance-free metal lubrication lines.
Visualizza tipo di braccio pressa →
Arc bending, dead edge and offset up to 2000 × 1500 mm. Up to 25 concurrent servo axes, 42CrMo forged blank holder, patented 360° rotating suction feeding for decorative panels.
Visualizza piegatrice →
Exchange-table fiber laser with rotating platform so the next sheet loads while the current one cuts. Smooth, burr-free cuts on stainless, essential where the cut edge stays visible on an architrave.
Visualizza unità laser →
Fixing hole patterns, ventilation grilles and stiffening ribs in one clamping. Brush and steel-ball composite table protects filmed stainless; ±0.1 mm accuracy, X-axis to 2500 mm with secondary positioning to 5000 mm.
Visualizza serie SF →
Native interface on every panel bender, compatible with most robotic arm and gantry brands. On 2.5 m cabin panels this removes the two-person lift that causes most surface damage.
Visualizza sistema a traliccio →
For 1.5 mm stainless landing door leaves and heavier frame parts that fall outside the panel bender window. Mechanical crowning compensation, high-precision grating ruler, multi-axis CNC back gauge.
Vedi serie PBE →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 2800 mm cabin panel line does not become a six-month subcontracting problem.




Elevator projects run to building handover dates. A panel that arrives with a visible joint step is rejected on site, not in your shop, so machine accuracy and fast support are the same conversation.
Le specifiche su questa pagina sono state verificate rispetto alla documentazione tecnica STON il 4 agosto 2026. I limiti di formatura sono confermati in base ai vostri disegni prima della quotazione. Pubblicato il 4 agosto 2026 · Ultimo aggiornamento 4 agosto 2026 · Revisionato da Vicky Xu, Responsabile Vendite Estero.
Two drawings decide the machine: your longest panel and your thickest stainless part. Send those and we come back within 24 hours with a model recommendation and a clear split between panel bender and press brake work.
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