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Waterjet Group -> Tips and Questions -> understanding how the head works
Post Info TOPIC: understanding how the head works
Malc31


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understanding how the head works
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Hey everybody im new to waterjets I recently joind a new company and its my first time on one. When its running good no problems but its not. Im trying to understand the functions that go on inside the cutter assembly in front. I know its normally a closed system but once the air and water come on how does it allow everything to work you would think if the air comes on it would keep things closed. Were running into a problem and if understood the process then I know I could understand whats going wrong. Sorry for the run on paragraph im on my phone and typing quickly. Anyway thanks if you can help and im glad to be apart of the forum



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GlassCannon


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When the air is applied to the head it opens the valve by applying pressure to the bottom of a disc thus allowing the HP water to push the needle valve up out of the way, the top of the disc is spring loaded which is a safety measure in the event of air loss. Typical problems with fire on/off sequences can range from a bent needle valve (head wont fire or fires on slowly) to a clogged breather vent (head continues to run after air is shut off). I'm not sure what type of equipment you are using but I reccomend getting a parts manual from your supplier with a breakdown and rebuild instructions and remember, you are dealing with ultra high pressure so safety first!

 

Hope this helps

~GC~



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TFabian


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TO add to the post above, there is a spring which keeps it normally closed. When air is applied it overcomes the spring, lifting a cylinder which presses down on a needle when all is closed. The pressure in the cutting head is now free to overcome the needle, raising it, and allowing water to pass through into the cutting head.

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Waterjet Group -> Tips and Questions -> understanding how the head works
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