1.Production Capacity for Blank Materials
| Block | W | L | H | PW | ||
| Pressure Direction/mm | Nondirectional/mm | Directional/mm | Single Weight/g | |||
| Min | 25.0 | 45.0 | 26.0 | 220.0 | ||
| Max | 58.0 | 133.0 | 45.0 | 2300.0 | ||
| Cylinder | D | H | PW | |||
| Pressure Direction/mm | Directional/mm | Single Weight/g | ||||
| Min | 6.5 | 28.5 | 7.0 | |||
| Max | 130.0 | 44.0 | 4500.0 | |||
| Tile Type | H | W | T | PW | ||||||
| Pressure Direction/mm | Nondirectional/mm | Directional/mm | Single Weight/g | |||||||
| Min | 25.0 | 45.0 | 26.0 | 220.0 | ||||||
| Max | 58.0 | 133.0 | 45.0 | 2300.0 | ||||||
| Process Control of Sintering Blank | Unit：mm | |||||||||
| Type | Sintering Dimensional Tolerance | Geometric Tolerance | ||||||||
Pressure Direction/ Outer Diameter | Nondirectional | Directional | Perpendicularity | Depth of Parallelism | ||||||
| ≤10 | ±0.3 | ±0.3 | ±0.4 | 90⁰ ±1° | ±0.3 | |||||
| 10-20 | ±0.3 | ±0.3 | ±0.4 | 90⁰ ±1° | ±0.3 | |||||
| 20-50 | ±0.5 | ±0.5 | ±0.5 | 90°±1° | ±0.3 | |||||
| 50-80 | ±0.5 | ±0.5 | ±0.5 | 90°±1° | ±0.3 | |||||
| 80-130 | ±0.5 | ±0.5 | ±0.5 | 90⁰ ±1° | ±0.3 | |||||
2.Processing Capacity
| Machining Dimensional Tolerance | |||||
| Product Type | Outer Diameter/Thickness | Internal and External Grinding | Flat Grinding/Thickness | Wire Cutting/Profile Griniding | Section |
| Circular Disc and Ring Products | ≤10 | ±0.01 | ±0.01 | ±0.03 | ±0.02 |
| 10-20 | ±0.02 | ±0.02 | ±0.04 | ±0.04 | |
| 20-50 | ±0.03 | ±0.03 | ±0.05 | ±0.05 | |
| 50-80 | ±0.05 | ±0.05 | ±0.05 | ±0.05 | |
| 80-150 | ±0.05 | ±0.05 | ±0.05 | ±0.05 | |
| Tile and Square Products | 5-10 | ±0.01 | ±0.01 | ±0.03 | ±0.02 |
| 10-20 | ±0.02 | ±0.02 | ±0.04 | ±0.04 | |
| 20-30 | ±0.03 | ±0.03 | ±0.04 | ±0.05 | |
| 30-40 | ±0.05 | ±0.05 | ±0.05 | ±0.05 | |
| >40 | ±0.05 | ±0.05 | ±0.05 | ±0.05 | |
| 3C Class Products | ±0.01 | ±0.01 | ±0.01 | ±0.01 | ±0.01 |
| Geometric Tolerance | |||||
| Specifications | Axiality | Roundness | Parallelism | Verticality | |
| Outer Diameter | Inside Diameter | ||||
| D≤5 | D≤3 | ±0.02 | <0.005mm | ≤0.02mm | 90°±0.15 |
| D5-D10 | D≤5 | ±0.04 | <0.01mm | ≤0.02mm | 90°±0.15° |
| D10-D20 | D≤8 | ±0.05 | <0.02mm | ≤0.02mm | 90°±0.15 |
| D20-D30 | D≤15 | ±0.08 | <0.02mm | ≤0.02mm | 90°±0.15° |
| D30-D40 | ≤20 | ±0.10 | <0.03mm | ≤0.02mm | 90°±0.15 |
| D>40 | >20 | ±0.10 | <0.03mm | ≤0.02mm | 90°±0.15° |
3.Surface Treatment
The company has 2 fully automatic electroplating production lines,3 semi-automatic electroplating lines,1 phosphating line,1 electrophoresis line,and 1 spraying line.We can produce surface coating treatments such as copper nickel,nickel copper nickel,zinc, copper nickel+epoxy,zinc+epoxy,and phosphating.
| Coating of Sintered NdFeB Magnets | |||||||
| Category | Code | Colour | Minimum Thickness | NSS | Damp Heat Test | HPHT | Temperature |
| Plated NiCuNi | NiCuNi | Silver | 12μm | 72h | 500h | 48h | <200℃ |
| Plated Blue&White | Zn | Blue&White | 4μm | 48h | 48h | N/A | <200℃ |
| Plated Multi-colored Zn | CZn | Multi-colored | 4μm | 72h | 48h | N/A | <200℃ |
| Electrophoretic Black/Gray Epoxy Coating | Black EP | Black/Grey | 15μm | 240h | 500h | 96h | <200℃ |
| Spray Coating Epoxy | SEP | Black | 10μm | 240h | 500h | 96h | <200℃ |
| Nickel-copper+Electrophoresis | NiCu+EP | Black | 25μm | 500h | 1000h | 200h | <200℃ |
| Zn+Electrophoresis | Zn+EP | Black | 18μm | 240h | 1000h | 200h | <200℃ |
4.Assembly of Halbach Array
Compared with traditional motors,the Halbach array circularly decomposes the superposition of parallel and radial magnetic fields,greatly increasing the magnetic field intensity on one side,effectively reducing the size of the motor and improving its power.Existing magnetic components require specific dimensions and magnetization directions,and are magnetized according to specific directions before being assembled and glued together in a Halbach array with a specific magnetic field distribution.Each magnet in the magnetic group has a specific magnetization direction,which results in signifhicant repulsive and torsional forces between them.
5.Spliced Products
Customized products can be provided to customers,and the electrical resistivity of the magnet can be improved by dividing the magnet and isolating the side of the magnet.This reduces the eddy current loss of sintered NdFeB.From the perspective of magnet design,the most effective way to reduce eddy current loss in motors is to use bonded magnets.Due to the presence of the binder and a sufficiently high volume fraction,the electrical resistivity of bonded magnets is 102-104 times that of sintered NdFeB.
6.Laser Processing Technology
Advantages oflaser processing on sintered NdFeB magnets include high cutting accuracy,flexible cutting shapes forirregularly shaped 3C products,and small kerf width of 0.15mm.
The core process of laser processing involves heat that can alter the characteristics of NdFeB,which requires strict equipment automation and process requirements.Our company has already mastered the automation process and core technology of laser precision grinding and cutting,ensuring stable mass production and consistency in size tolerances and performance for our customers.
