Engine Valve Bar Material Chamfering Machine
1. Processing range (the original state of the workpiece):
Workpiece status |
Processing conditions |
Remarks |
Valve head diameter |
70-----550 |
|
Stem diameter |
φ 5~14㎜ |
|
Length |
70~550㎜ |
|
Material quality |
21-4N+4Cr10Si2Mo |
|
Hardness |
30—60HRc |
|
Stem run-out |
|
|
Valve head surface run-out |
|
|
2. Processing accuracy and cycle time:
Position |
Accuracy |
Test methods and tools |
Run-out accuracy |
Continuously process and measure 50 pieces within 0.10 mm. |
Special measuring tool |
Dimensional accuracy |
Continuously process and measure 50 pieces within ± 0.05 mm. |
Vernier calipers |
Surface roughness |
Continuously process and measure 50 pieces within Ra 1.6 μ m. |
Roughness gauge |
Cycle time |
Take the processing stem diameter 6.2 as the standard - 7s/pc. |
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