Cylinder head processing tool production line has mainly combined tools. There are multiple combinations according to different processing items. The surface processing is the same as the cylinder milling cutter. The tools for several key processing items are as follows.
(1) Machining tool for seat ring hole
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Processing tasks 1 |
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Parts |
cylinder head 4 covers |
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Processing material |
AlSi8 |
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Processing procedure |
rough machining of guide pipe hole and seat ring hole and orifice chamfering; |
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Cooling |
internal cooling |
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Machine tool |
machining center |
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Cutting parameters |
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vc=445m/min |
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D=28, 5/32, 4mm |
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Z=1+2+2 |
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fz=0.075mm/insert |
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vf=750mm/min |
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Solution: boring tool + formed carbide blade |
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Conclusion: 18 000 workpieces×4×2valves=144 000 machining holes |
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Processing tasks 2 |
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Parts |
cylinder head 4 covers |
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Processing material |
AlSi8 |
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Processing procedure |
finishing pipe hole guide and seat ring hole |
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Cooling |
internal cooling |
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Machine tool |
machining center |
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Cutting parameters |
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v c=445/900m/min; |
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D=11/27mm; |
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Z=3/4; |
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f=0.3mm/rev; |
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vf=3000mm/min. |
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Solution: PCD welding reamer. |
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Conclusion: 57 000 workpieces×4×2valves=456 000 machining holes. |
The silicon carbide substrate preparation process mainly includes raw material synthesis, silicon carbide crystal growth, ingot processing, ingot cutting, cutting piece grinding, grinding piece polishing, polishing piece cleaning, etc.Among them, the key and difficult points of preparation are mainly the crystal growth, cutting, grinding and polishing links, which are the key points and difficulties in the entire substrate production process, and become the bottleneck that limits the yield rate and production capacity of silicon carbide.
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