In transformer manufacturing, even the smallest deviation in core laminations can result in energy loss, noise, or mechanical failure. That’s why quality is a process, not a checkpoint and at Sarjani Coretech, it begins long before the first slit or punch is made.
Here’s a detailed look into Sarjani’s lamination production workflow a system designed to eliminate uncertainty and deliver high-performance CRGO transformer cores, every time.
1. Raw Material Selection: The Foundation of Performance
We begin with sourcing cold-rolled grain-oriented (CRGO) steel from certified mills. Each coil is chosen based on technical parameters like core loss value (W/kg), insulation coating type, and rolling direction.
2. Material Selection & Sample Testing: Trust but Verify
Before production begins, every coil undergoes sample testing for magnetic properties, insulation resistance, and dimensional accuracy. This ensures compatibility with client specifications and standards such as IS, IEC, and customer-specific norms.
3. Slitting: Clean Cuts, Controlled Widths
The coils are slit into required widths using high-precision slitting lines. Our machines maintain tight tolerance limits (<±0.1 mm) to ensure laminations stack uniformly and minimize air gaps.
4. Cutting: Geometry Without Guesswork
Based on customer drawings, laminations are cut into mitred, rectangular, or step-lap forms. Using CNC-enabled machines like Can win, we achieve burr-free edges, consistent angle control, and reduced handling damage.
5. Inspection: No Lamination Passes Without It
Cut laminations undergo dimensional and angular inspection, along with burr and surface checks. Random samples are tested against stack height and T-joint alignment to ensure ease of assembly.
6. Quality Inspection: Core Loss and Coating Matters
Each batch undergoes final visual and magnetic property checks to ensure insulation coating integrity and core loss values fall within approved limits. Defective units are culled before reaching packing.
7. Final Inspection & Packing: Built for Transport
Once passed, laminations are packed on treated wooden pallets, with rust-prevention wrapping and alignment support to prevent damage during handling. Each unit is tagged with batch and order codes for traceability.
8. Dispatch: Timely Delivery. Zero Deviation.
Whether it’s a pilot batch or a high-volume production run, we ensure every delivery meets the promised schedule with full documentation and compliance support.
Conclusion
At Sarjani Coretech, every lamination we ship has passed through a structured, quality-first process that minimizes variability and maximizes transformer performance. Because when your core is built right, everything else flows better.
From coil to core, we don’t compromise.