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Return to: Welding Shop |
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#Post#: 39584-------------------------------------------------- |
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cutting edm water jet |
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By: aclarke Date: May 1, 2014, 10:49 pm |
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hoping to have some big end pins cut down while maintaining the |
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Rockwell hardness of the surface. Need to remove about 5mm, |
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anyone have experience with EDM cutting or water jet? I'm hoping |
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to NOT have to finish grind on my lathe to final length. Any |
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ideas? |
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#Post#: 39650-------------------------------------------------- |
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Re: cutting edm water jet |
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By: 3000 FPS Date: May 2, 2014, 11:18 pm |
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Sorry Adam I have no experience but try one and see what |
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happens. It is the R&D that guys like you do that makes this |
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hobby interesting. |
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#Post#: 39654-------------------------------------------------- |
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Re: cutting edm water jet |
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By: 660magnum Date: May 3, 2014, 12:14 am |
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It's been 40 years since I was around one but I don't remember |
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them resulting in a 10 micron finish? The action is done |
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submerged to keep the oxygen away. |
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#Post#: 39669-------------------------------------------------- |
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Re: cutting edm water jet |
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By: aclarke Date: May 3, 2014, 8:36 am |
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Going by the machine shop Monday, ill share my findings. |
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#Post#: 39707-------------------------------------------------- |
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Re: cutting edm water jet |
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By: Al Smith Date: May 3, 2014, 6:29 pm |
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My only experiance has been the usage of burning out broken |
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carbide taps from production run cast iron engine blocks .Worked |
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good for that ---most of the time. |
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#Post#: 39739-------------------------------------------------- |
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Re: cutting edm water jet |
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By: Reddog Date: May 4, 2014, 11:33 am |
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How large in Dia? and what Rockwell? |
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Waterjets do best with flat surfaces like plate or bar. |
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EDM wire machines can lop it right off, but won't leave a |
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polished surface. |
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Surface grinder or jig ground in a lathe may be the cheapest |
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option for a good surface finish on RC 55 or higher. |
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Below RC 55 just face it in a lathe with carbide insert tooling. |
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Polish in the lathe with a die grinder. |
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#Post#: 39761-------------------------------------------------- |
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Re: cutting edm water jet |
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By: aclarke Date: May 4, 2014, 10:44 pm |
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The replacement 3120xp big end pin is 18mm and needs to have the |
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length reduced by 4-5MM before I send it out for |
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assembly/balancing. Rc60-62. I have a tool post grinder to |
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touch up the ends after cutting. Not sure if the water jet |
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would tend to frost the hardened surface adjacent to the cut? |
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I'm thinking wire EDM might be cleaner? |
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Adam |
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#Post#: 39781-------------------------------------------------- |
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Re: cutting edm water jet |
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By: Reddog Date: May 5, 2014, 12:16 pm |
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Sounds like a wire EDM will be the quickest. Have them leave a |
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few thou to polish in your lathe. |
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#Post#: 39788-------------------------------------------------- |
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Re: cutting edm water jet |
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By: aclarke Date: May 5, 2014, 4:29 pm |
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Sounds good. Thanks |
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#Post#: 39817-------------------------------------------------- |
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Re: cutting edm water jet |
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By: aclarke Date: May 6, 2014, 8:32 am |
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Took them to the machine Shop yesterday. They are gonna edm cut |
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them. Surface finish on some sample pieces he showed me were |
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quite smooth with a slightly frosted appearance, no need to |
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finish Machine with the exception of a chamfer to aid in |
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pressing together |
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