Side Trimmer for Silicon Steel

High-Precision Side Trimmer for Silicon Steel CBL in Anyang Steel

1. Project Overview

Project Name: Anyang New Silicon Steel Continuous Decarburization & Annealing Line (CBL) Project

Location: Anyang City, HeNan Province, China

End User: Leading Silicon Steel Producer in Central China

Equipment Supplier: Xiangyang Jiade Machinery

Application: Edge Trimming of Non-Oriented (NO) and Grain-Oriented (GO) Silicon Steel

Key Process Parameters:

· Material: Electrical Steel (Silicon Steel) 23QG075-100,27QG100-110,30QG105-120

· Strip Width: 950 – 1,250 mm/800 – 1,300 mm

· Strip Thickness: 0.18 – 0.5 mm (Ultra-thin focus)

· Line Speed: 300 m/min (for side trimmer)/120 m/min (for scrap chopper)

· Commissioning Date: Q4 2025

2. Background & Challenges

Silicon steel, often referred to as the "pearl on the crown of the steel industry," demands extreme precision in dimensional accuracy and edge quality. To expand production of high-grade silicon steel for NEV motors and high-efficiency transformers, the client initiated a greenfield CBL project in Handan.

However, trimming silicon steel at high speeds presents unique challenges:

· Hard Material & Spring back: Silicon steel’s high hardness and elasticity make it difficult to achieve clean cuts without burrs.

· Ultra-Thin Gauges: At thicknesses down to 0.18mm, maintaining edge straightness and preventing micro-cracks is critical.

· High-Speed Stability: Running at 300 m/min generates significant dynamic forces, risking vibration, width deviation, and excessive tool wear.

The client required a side trimmer capable of delivering burr-free edges and micron-level width accuracy under these demanding conditions.

3. Xiangyang Jiade Machinery Solution

To meet the stringent requirements of the CBL line, Xiangyang Jiade Machinery engineered and supplied a High-Rigidity Hydraulic Locking Side Trimmer. The key design features included:

· Massive Fabricated Housing: A stress-relieved, welded steel frame designed specifically to dampen vibrations at 600 m/min, ensuring structural integrity.

· Precision Blade Gap Control: Equipped with high-precision ball screws for adjusting overlap and side clearance, achieving a setting accuracy of ±0.01 mm.

· Hydraulic Locking System: High-pressure hydraulic clamping on the cutter arbors prevents axial movement during high-speed rotation, guaranteeing cut perpendicularity.

· Laser Guidance System: Integrated laser sensors monitor strip position and camber in real-time, automatically adjusting the trimmer angle to maintain uniform trimming margins.

4. Performance Results & Technical Advantages

4.1 Superior Edge Quality for Ultra-Thin Gauges

Even at the extreme limits of 0.10mm thickness and 600 m/min, the Jiade trimmer maintained exceptional cut quality.

· Burr Control: Burr height was consistently maintained at ≤ 0.02 mm (surpassing the industry standard of 0.03 mm), effectively preventing edge micro-cracks that increase core loss.

· Cut Face Geometry: The shear plane verticality reached 90° ± 1°, significantly improving the stacking factor of the laminations.

4.2 Unmatched Width Accuracy at High Speed

Thanks to the rigid design and active control systems, width deviation was minimized even at maximum line speed.

· Width Tolerance: Stabilized within ± 0.05 mm, meeting the stringent requirements for high-precision motor stator and rotor stamping.

· Edge Straightness: Effectively corrected "sickle bend" (camber), ensuring tight coil winding and smooth downstream processing.

4.3 Extended Tool Life & Productivity

· Wear Resistance: Blades treated with specialized alloys and coatings achieved a 20% increase in grinding intervals compared to previous solutions.

· Quick Change System: The integrated Quick Tool Change Unit (CTU) reduced blade changeover time to under 15 minutes, drastically reducing downtime.

· Yield Improvement: Precise trimming (minimum trim set to 3mm) contributed to an overall yield increase of 0.8%.

5. Problems Solved for the Client

6. Client Testimonial

"Xiangyang Jiade Machinery’s Side Trimmer has been a standout performer on our new Handan CBL line. Operating at 0.10mm gauge and 300 meters per minute is a rigorous test for any equipment, but their machine delivers flawless edge quality and rock-solid reliability. It has been instrumental in ensuring the high yield and superior magnetic properties of our premium silicon steel products."

— Plant Manager, Silicon Steel Division

7. Project Significance

This project represents one of the few production lines in Central China capable of trimming 0.10mm ultra-thin silicon steel at 300 m/min. The successful deployment of Xiangyang Jiade Machinery's Side Trimmer not only solved critical processing challenges for the client but also demonstrated the company's capability to deliver world-class cutting solutions for the most demanding metallurgical applications.

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