In transformer manufacturing, even the smallest deviation in core transformer laminations can result in energy loss, noise or mechanical failure. That’s why Sarjani Coretech treats quality as a process, not a checkpoint, and begins it long before the first slit or punch is made.
Here’s a detailed look into Sarjani’s transformer laminations 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. The team chooses each coil based on 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
The team cuts laminations into mitred, rectangular or step-lap forms based on customer drawings. 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. Technicians test random samples for stack height and T-joint alignment to ensure easy 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
The team packs the passed laminations on treated wooden pallets, wraps them with rust-prevention material, and adds alignment supports to prevent handling damage. They tag each unit with batch and order codes for full 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.