Gear shaving cutters
Gear Shaving Cutters
Company：NIDEC MACHINE TOOL CORPORATION
Super coat shaving cutter
Features
The cutter's wear resistance strengthened with Super coat
No change on the surface and the roughness of cutting face almost not affected
Minimized distortion of serration depth
Samples
| Work | m2.7, PA 20°, 68T |
| HA 28°, RH, O.D. 116mm | |
| Tooth width | 36mm, 18CrMo4 |
| Cutter | 79T, O.D. 225mm |
| MACH3+ Super Coat | |
Fine pitch shaving cutter
Samples
Extended tool life and cost reduction are achieved owing to Fine pitch, material change and Super coat SVC.
| Work piece | m1.7 PA17.5° HA36° NT45° |
|---|---|
| Cutter | NT113 HA21° |
| Measure for improvement | High rigidity, fine pitch, super coating |
| 切削条件 | 79T Φ225 |
| Cutting condition | Rotational speed 220 rpm feed amount 0.4 mm/min T1:2 T2:4 T3:4 BM:0.02 Plunge |
Processed tooth surface with Fine Pitch SVC
(wear after processing 5500 units of work piece)
Processed tooth surface with SVC of other manufacturer
(wear after processing 1500 units of work piece)
Processing by shaving cutters
Adjust the crossed axes angle between a work piece processed with hob and / or shaper cutter and shaving cutter at 5° to 15° and rotate them after meshing each other; sliding motion of the tooth surface enables fine finishing with only a slight amount of cutting.
The processing by shaving cutter is largely applied in gear production lines of auto mobiles and construction machineries because of its cost efficiency.
This processing is performed only before heat treatment. On the other hand, profile grinding is performed after heat treatment.
Conventional cutting
Underpass cutting
Move the cutter from the lower location colored in blue to the upper location colored in red; contact point moves from left to right and enables the processing of the entire tooth.
In case that the space between each gear is narrow, it may be difficult for conventional processing to be applied because of not enough crossing angle. In such a case Underpass processing might be applied.
Diagonal cutting
Move the cutter to the arrow direction colored in red; If fed in diagonal direction, meshing point will move from right edge A to left edge B of a work piece.
Plunge cutting
加工条件の設定(基本的なシーケンス)
| 切削速度 | プランジ、 アンダーパス | 145m/min |
|---|---|---|
| ダイアゴナル、 コンベ | 120m/min | |
| 注意 | ワークの回転速度 | < 2000rpm |
| 軸物 | < 1000rpm |
プランジシェービングの特徴と一般的な加工条件
Sharpening method
Shaving cutter grinder ZA30A
