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Updated: May 22, 2025

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

Process Parameters Analysis in Diamond Wire Saw Cutting NdFeB Magnet.

Chengwanli Peng¹, Guanzheng Li², Xingchun Zhang²

¹SDU-ANU Joint Science College, Shandong University, Weihai 264209, China.

Materials (Basel, Switzerland)

|March 13, 2025

Summary

Optimizing diamond wire saw cutting of Neodymium iron boron (NdFeB) magnets shows feed rate is key. Best results for surface roughness and waviness were achieved with a feed rate of 0.1 mm/min, wire speed of 1600 m/min, and workpiece size of 10 mm.

Keywords:

NdFeB magnet diamond wire saw orthogonal experiment process parameters surface waviness

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Area of Science:

Materials Science
Manufacturing Engineering
Surface Metrology

Background:

Neodymium iron boron (NdFeB) magnets are critical in advanced technologies like electronics and medical devices.
Precise machining of NdFeB is essential for performance, but challenging due to material properties.
Diamond wire sawing is a common method for processing these sensitive magnetic materials.

Purpose of the Study:

To investigate the impact of key processing parameters on the surface quality of diamond wire saw cut NdFeB.
To determine the optimal parameter combination for minimizing surface roughness (Ra) and waviness (Wa).
To analyze the influence of these parameters on the peak valley (PV) difference of the waviness profile.

Main Methods:

A five-level, three-factor orthogonal experiment was designed for diamond wire saw cutting of NdFeB.
Key parameters studied included workpiece feed rate, diamond wire speed, and workpiece size.
Surface roughness (Ra), waviness (Wa), and PV value were measured and analyzed.

Main Results:

Workpiece feed rate was identified as the most significant factor affecting Ra and Wa, followed by wire speed and workpiece size.
The optimal processing parameters were determined to be a feed rate of 0.1 mm/min, wire speed of 1600 m/min, and workpiece size of 10 mm.
Achieved surface roughness Ra was 0.433 μm and waviness Wa was 0.037 μm under optimal conditions.

Conclusions:

The study provides a clear hierarchy of parameter influence for NdFeB wire sawing.
The identified optimal parameters offer a practical guideline for achieving high-quality surfaces in NdFeB processing.
A regression model (PV = 0.747 × vs⁻⁰.³⁴² × v⁰.⁵⁴⁶ × L⁰.¹⁰⁹) was developed for predicting waviness PV values.