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Pneumatic Expandable Mandrel for HV Transformer Coil Winding, 150–2600mm AdjustablePneumatic Expandable Mandrel for HV Transformer Coil Winding1. Product OverviewThe pneumatic expandable mandrel is a precision tooling component designed for HV transformer coil winding and forming operations. It uses a cage-type expandable structure driven by a pneumatic cylinder (with manual fine-tuning backup), allowing the outer diameter to expand and contract smoothly for quick coil loading and damage-free stripping. The mandrel body is machined from high-strength alloy steel, with all sliding surfaces precision-ground to IT6–IT9 tolerance and surface finish Ra 0.63μm. Diameter deviation at any cross-section is held within ≤2mm, and overall cylindricity error is ≤2mm, ensuring uniform winding tension and coil geometry. Compatible with both horizontal and vertical transformer winding machines, the unit supports OEM/ODM customization on diameter range, active length, load rating, and coil cross-section shape (round, rectangular, obround). 2. Key Specifications
3. Core Design FeaturesPneumatic Expansion with Manual Override Pneumatic cylinder drives the cage frame for rapid diameter change. A manual fine-tuning mechanism allows micro-adjustment when precise coil ID control is required. This dual-mode design adapts to both high-volume production and small-batch custom winding. Zero-Damage Coil Stripping The cage segments retract uniformly inward to reduce outer diameter below the coil's inner diameter, allowing the finished coil to slide off without radial pressure. This eliminates coil deformation, insulation scratching, or conductor displacement during demolding. High-Rigidity Cage Structure The main cage frame, sliding sleeves, strip plates, and transmission components are machined from a single batch of alloy steel to maintain dimensional consistency. The structure resists deformation under 20T coil weight and high-speed winding tension. Precision Tolerance Control Every mandrel undergoes 100% dimensional inspection before shipment. Diameter deviation and cylindricity are verified at multiple cross-sections. This ensures the wound coil has uniform layer density, consistent inner diameter, and coaxial alignment — directly improving transformer electromagnetic performance and reducing rejection rate. Wide Machine Compatibility Designed to mount on standard horizontal and vertical transformer winding machines from major OEMs. Adapter plates and shaft ends can be customized to match existing equipment interfaces. 4. Typical Applications
5. Quality Assurance & Customization
6. Ordering InformationTo select the correct mandrel model, please provide:
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商品说明
Pneumatic Expandable Mandrel for HV Transformer Coil Winding1. Product OverviewThe pneumatic expandable mandrel is a precision tooling component designed for HV transformer coil winding and forming operations. It uses a cage-type expandable structure driven by a pneumatic cylinder (with manual fine-tuning backup), allowing the outer diameter to expand and contract smoothly for quick coil loading and damage-free stripping. The mandrel body is machined from high-strength alloy steel, with all sliding surfaces precision-ground to IT6–IT9 tolerance and surface finish Ra 0.63μm. Diameter deviation at any cross-section is held within ≤2mm, and overall cylindricity error is ≤2mm, ensuring uniform winding tension and coil geometry. Compatible with both horizontal and vertical transformer winding machines, the unit supports OEM/ODM customization on diameter range, active length, load rating, and coil cross-section shape (round, rectangular, obround). 2. Key Specifications
3. Core Design FeaturesPneumatic Expansion with Manual Override Pneumatic cylinder drives the cage frame for rapid diameter change. A manual fine-tuning mechanism allows micro-adjustment when precise coil ID control is required. This dual-mode design adapts to both high-volume production and small-batch custom winding. Zero-Damage Coil Stripping The cage segments retract uniformly inward to reduce outer diameter below the coil's inner diameter, allowing the finished coil to slide off without radial pressure. This eliminates coil deformation, insulation scratching, or conductor displacement during demolding. High-Rigidity Cage Structure The main cage frame, sliding sleeves, strip plates, and transmission components are machined from a single batch of alloy steel to maintain dimensional consistency. The structure resists deformation under 20T coil weight and high-speed winding tension. Precision Tolerance Control Every mandrel undergoes 100% dimensional inspection before shipment. Diameter deviation and cylindricity are verified at multiple cross-sections. This ensures the wound coil has uniform layer density, consistent inner diameter, and coaxial alignment — directly improving transformer electromagnetic performance and reducing rejection rate. Wide Machine Compatibility Designed to mount on standard horizontal and vertical transformer winding machines from major OEMs. Adapter plates and shaft ends can be customized to match existing equipment interfaces. 4. Typical Applications
5. Quality Assurance & Customization
6. Ordering InformationTo select the correct mandrel model, please provide:
→ Contact our engineering team for a quote, 3D model preview, or technical datasheet. 商品参数
1. Detailed Technical Specifications
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