Multi-wire Saw
1. Basic Equipment Information
Brand: BoJu Model: DX850NS. It is a mainstream precision slicing machine in the NdFeB permanent magnet industry, widely used for mass slicing of rare earth magnets.
2. Working Principle
Diamond wires are wound on the main spindle rollers and arranged into a mesh of hundreds of parallel cutting lines. The diamond wires move reciprocally at a constant high speed with cooling and lubrication by cutting fluid. The blank feeds downward and is ground by diamond abrasive grains. Dozens of thin slices can be cut in one single feed, replacing conventional single-piece inner diameter slicing.
3. Core Applications
Mainly used for slicing sintered NdFeB permanent magnets; also compatible with samarium cobalt, ceramics, sapphire, silicon carbide and other hard-brittle materials:
Cut large magnet blanks in batches into round or square magnet slices with specified thickness.
Process semi-finished magnets for new energy motors, speaker magnets, consumer electronic magnetic steel, wind power magnets, etc.
Solve machining challenges of NdFeB featuring high hardness, high brittleness and high risk of chipping & cracking.
4. Advantages over Traditional Slicers
High productivity: Cuts dozens of slices in one run. Its output is several times higher than inner diameter slicers, ideal for mass magnet production.
Stable precision: Tight thickness tolerance, excellent parallelism and perpendicularity. Thin slices are less prone to warping and chipping for higher yield rate.
High material utilization: Extremely narrow kerf of diamond wire, far less material loss than old cutting technologies.
High automation: Can connect with loading & unloading assembly lines for continuous production with minimal manual intervention.
Ultra-thin processing capability: Machining ultra-thin magnet slices to meet requirements of precision magnets.
5. Unique Highlights of BoJu Model
Built-in active thermal error compensation structure, minimizing dimension drift during long-hour high-speed cutting and ensuring good dimensional consistency for batches. Closed-loop servo wire tension control reduces wire breakage rate and lowers maintenance cost. Enclosed sheet metal protection + spray cooling system reduces contamination from dust and cutting fluid to keep workshop clean. Gantry rigid frame with low vibration under heavy load cutting, suitable for squaring and slicing of large-size magnet blanks.
6. Typical Process Flow
Magnet blank bonding on fixture → Workpiece clamping & alignment → Setting wire speed, feed rate and cutting thickness → Automatic synchronous multi-wire cutting → Unloading & sorting slices → Cleaning, then transferring to grinding / electroplating process