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JY-400 Double Shear Four Punch Cut-to-Length Line (Reverse Stacking Type)
Advanced Transformer Core Lamination Production Line
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The JY-400 Double Shear Four Punch Cut-to-Length Line (Reverse Stacking Type) is a high-performance, fully automatic production system designed for precision processing of grain-oriented silicon steel coils into transformer core laminations.
This advanced machine integrates feeding, dual V-notching, dual hole punching, angle shearing, automatic sorting, and reverse stacking (magnetic suction system) into a continuous production line, ensuring high efficiency, superior accuracy, and stable long-term operation.
It is an ideal solution for manufacturing step-lap transformer cores, EI laminations, and mitered transformer sheets.
Product Overview
This silicon steel cut-to-length line is designed to:
Process electrical steel coils into high-precision laminations
Support full miter, half miter, and straight joints
Achieve automatic stacking through reverse magnetic suction system
Improve transformer core consistency and reduce manual handling
Compared with standard machines, this model offers higher automation, greater punching flexibility, and improved stacking accuracy.
Key Features
Double Shear + Four Punch Configuration (High-End Model)
2 × V-notch punching units
2 × hole punching units
2 × angle shearing units (45° & 135°)
This structure enables multi-hole and multi-notch processing in one cycle, significantly improving production efficiency.
Reverse Stacking System (Magnetic Suction Type)
Automatic lamination sorting and stacking
Magnetic suction alignment system
Stacking accuracy up to ±5 mm
Reduced labor cost and improved consistency
Perfect for high-end transformer core production lines.
High Precision Servo Control System
Delta PLC + servo motors
Real-time feeding and positioning
Touchscreen HMI interface
Stable, low-noise operation
Wide Processing Range
Thickness: 0.18 – 0.35 mm
Width: 40 – 410 mm
Length: 400 – 2500 mm
Hole diameter: 10 – 24 mm
V-notch depth: up to 220 mm
Suitable for a wide range of transformer core specifications.
High Accuracy & Low Burr
Length tolerance: ±0.2 mm/m
Angle tolerance: ≤ ±0.1°
Burr: ≤ 0.02 mm
Ensures tight lamination stacking and better magnetic performance.
High Production Efficiency
Cutting speed: ≥ 52 pieces/min
Feeding speed: up to 2000 mm/s
Continuous automatic production
Ideal for large-scale transformer manufacturing.
Main Components
Double-head hydraulic decoiler (180° rotation)
Inclined feeding guide system
Servo feeding & length measuring system
Dual V-notch punching machines
Dual hole punching machines
Double angle shearing units
Conveyor with magnetic positioning
Reverse stacking system (magnetic suction type)
Full-line automatic width adjustment system
Pneumatic system (AirTAC)
Electrical system (Delta + Schneider)
Advantages
Higher efficiency with double shear four punch structure
Multi-hole punching improves flexibility
Reverse stacking ensures better lamination alignment
Reduced manual labor and operational cost
Stable servo system for long-term industrial use
High precision reduces transformer core loss
Applications
Power transformer manufacturing plants
Distribution transformer production lines
Dry-type transformer factories
Electrical steel processing companies
Transformer core lamination workshops
