Nous sommes responsables de la construction-----nous sommes responsables de la fabrication-----nous sommes responsables de la formation
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 à fibre for blanking, a Cintreuse de panneaux CNC in D (2500) or D+ (2800) size with a cast-iron frame for the long panels, a machine à plier les bords à réglage flexible where panels need dead edges or arc returns, and a presse plieuse for stainless above the panel bender's 1.2 mm limit.
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 →
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.
| Paramètres | Panel bender — cast-iron frame | Panel bender — welded frame | Remarques |
|---|---|---|---|
| Acier inoxydable | ≤1.2 mm | ≤1.0 mm | 1.5 mm stainless needs a press brake at full length |
| Cold-rolled / coated steel | ≤2.0 mm | ≤1.5 mm | Covers door frames and backing panels |
| Aluminium | ≤2.5 mm | ≤2.5 mm | En fonction de l'alliage |
| Dimensions maximales de formage | 2500 × 1500 mm (D) / 2800 × 1500 mm (D+) | Choose by your longest cabin panel | |
| Hauteur de flexion | 5 mm au minimum / 170, 300 ou 400 mm au maximum | Par configuration | |
| Angle de flexion | 0–180°, positive and negative | Dead edge on folding machine | |
| Précision angulaire | approx. ±0.5°/m | Decides flush joints between panels | |
| Rectitude | environ 0,2 mm/m | Critical over 2500 mm panels | |
| Précision dimensionnelle | approx. ±0.1 mm/m | Vérifié lors de la mise en service | |
| Services publics | Triphasé 380 V, air comprimé à 0,6 MPa | Réglé sur la tension de destination | |
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.
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. For the finished lift installation, EN 81-20 et 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.
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.
Elevator manufacturers need all three processes. The value of getting the split right is that each machine only does what it is efficient at.
| Cintreuse de panneaux CNC | Presse plieuse CNC | Profilage | |
|---|---|---|---|
| Géométrie de la pièce | Panneaux plats repliés sur les quatre côtés | Any bend line, any thickness in capacity | Uniquement les profils à section constante |
| 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 | Set by tonnage and tooling | Set by the roll set |
| Max panel length | 2 800 mm | 4 100 mm | Pratiquement illimité |
| Straightness over 2.5 m | environ 0,2 mm/m | Depends on crowning and operator | Excellent, but fixed section |
| Decorative face protection | Vacuum pick-up, no contact | Manual handling at every step | Line-dependent |
| Changeover between cabin models | Rappel du programme, procès-verbal | Changement d'outil et remise à zéro de la jauge | Changement de série de rouleaux, de quelques heures à plusieurs jours |
| Est-ce que STON le fournit ? | Oui | Oui | No — different process |
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.
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 | Plieuses uniquement | Panel bender cell with vacuum loading |
|---|---|---|
| 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 | Dragged across the back gauge each bend | 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 | environ 0,2 mm/m |
| Surface scrap on hairline stainless | The single largest scrap category | Largely eliminated |
| On-site shimming at installation | Common when joints do not sit flush | Reduced by consistent panel geometry |
| Changeover between cabin models | Changement d'outils, remise à zéro des jauges, contrôle du premier article | Rappel de programme et ajustement rapide de la rémunération |
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.
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.
Voir le type de bras de presse →
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.
Voir la plieuse →
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.
Voir l'unité 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.
Voir la série 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.
View truss system →
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.
Voir la série 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.
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.
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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