Case Studies
Motor Spindles
E3000i series
♯ Special Purpose Machine
♯ Milling
♯ Steel
♯ Die/Mold
♯ φ1.1～φ2.0
[R0.75mm Ball End Mill Machining] Machining Center × Flange Type Spindle
Product： BMF-3160-CTZ
Spindle O.D.：φ31mm
- Product series
- E3000i
- Product
- BMF-3160-CTZ
- Spindle O.D.
- φ31mm
- Machine
- Sodick (MC430L)
- Work
- Plastic mold steel/PD613 (56HRC)
- Tool diameter
- Nissin tool MACH225SF R0.75 (2 flutes)
- Machining form
- (1)Contour machining (rough machining)
(2)Scanline machining (medium finish)
Cutting Condition
| Conventional conditions Machine's built-in spindle | Nakanishi's proposed conditions 60,000min-¹ flange spindle used | |
|---|---|---|
| Cutting speed | 94m/min | 198m/min |
| Rotation speed | 20,000min⁻¹ | 42,000min⁻¹ |
| Feed rate | 1,200mm/min | 2,600mm/min |
| Feed per edge | 0.03mm/tooth | 0.03mm/tooth |
| Depth of cut Ap×Ae | 0.1×0.2mm for rough machining Semi-finishing 0.02×0.03mm | 0.1×0.2mm for rough machining Semi-finishing 0.02×0.03mm |
| Machining time | Rough machining/1 h 57 min 00 sec Semi-finishing/1 h 18 min 26 sec Total/3 h 15 min 26 sec | Rough machining/59 min 01 sec Semi-finishing/39 min 09 sec Total/1 h 38 min 10 sec |
Point
High-speed cutting with R0.75mm ball end mill was performed on plastic mold steel: PD613 (56HRC). Also, a cutting comparison between a machining center built-in spindle (20,000min⁻¹) and 60,000min⁻¹ flange spindle “BMF-3160” (42,000min⁻¹) was conducted.
≪Points≫.
Nakanishi spindle (60,000min⁻¹ flange spindle: BMF-3160) realizes high-precision, high-speed cutting with a small diameter end mill. Compared to the machine’s built-in spindle (conventional conditions), the high-speed rotation more than doubles the feed rate and reduces machining time by 50%!
