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Friday, 05 / 25, 2018

MACHINE ALLOWANCE

The machine finish allowance of investment casting

The Basic casting dimension
鑄件基本尺寸
The single Face maching allowance
單面加工預留量
Cutting maching
切削加工
Grinding maching
磨削加工
Gate setting
澆口設置
<= 40 0.7 ~ 1.0 0.2 - 0.5 2.0
40 ~ 100 1.0 ~ 1.5 0.5 - 0.7 3.0
100 ~ 250 1.5 ~ 2.0

0.7 - 1.0

4.0
250 ~ 500 2.0 ~ 3.0 1.0 - 1.5 5.0

Angle Tolerance

Angle Type
角度形式
Normal
一般公差
± 1° ± 2° ± 2°
Premium
特別公差
±0.5° ± 1° ± 1°
Avoid the quick changes of casting structure, use fillet radiuson intemal angle when possible, which is no less than R0.3mm
鑄件結構應避免急劇變化,儘可能避免尖角,圓角應達到R0.3mm以上。.