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#1501 - 10/26/20 12:29 PM Increasing of the intensity
Tim Offline
Member

Registered: 10/26/20
Posts: 3
Hi there! smile Good to find shot peen forum and i hope someone can help me.
Here is the deal. I have shot peen chamber. I need to get intensity value 0.010 to 0.012 with almen strips type A. But most times i get close to 0.010, the value ~0.0097-0.0099. Sometimes i can reach 0.010 and a little more, something like 0.0103, but this is an exception. And i feel non-uniform flow of the shot. The pressure set to 7 bar in static and 6.5 bar when shot peening chamber is working.. If i set it to 8 bar, than there is no shot flowing, only air. 7 bar and below - shot is flowing but with non-uniform flow, and intensity most times <0.010 frown

So here is the questions:
1) How can i increase intensity in my situation?
2) How to get uniform, steady shot flow through nozzle?

Some parameters of the shot peen chamber:
1) Nozzle size 8mm (~1/3").
2) Air hose diameter 1/2" (~12mm).
3) Abrasive material hose 1" (~25mm).
4) Pressure up to 8 bar.
5) Shot s230.
6) Saturation curve created by 4 different alen strips type A, built in "peensolver"
5) The processing angle 45-135 degrees, distance between nozzle and almen strip is ~40mm.
Click to reveal...





Edited by Tim (10/26/20 12:30 PM)

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#1502 - 10/26/20 03:17 PM Re: Increasing of the intensity [Re: Tim]
Walter Offline



Registered: 05/03/99
Posts: 167
Loc: East Hartford, CT, USA
Can you provide some more pictures of your machine? This appears to be a gravity suction type of machine. Is the media in a hopper on top of the machine or are you attempting to pull the media from the bottom? It appears to be from the bottom and I believe that is the problem.

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#1503 - 10/26/20 03:39 PM Re: Increasing of the intensity [Re: Tim]
Tim Offline
Member

Registered: 10/26/20
Posts: 3
Thank you for answer. Yes, the shot moves from the botton storage by the wide dark hose with internal diameter 25mm. The air hose is white.
I tried to find some information, some sites said that probably the abrasive hose is too wide, or i should use regulator to control the consumption of abrasive. I will try to use much narrow hose. May be it will help to fix the flow.


Edited by Tim (10/26/20 03:45 PM)

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#1504 - 10/26/20 03:49 PM Re: Increasing of the intensity [Re: Tim]
Walter Offline



Registered: 05/03/99
Posts: 167
Loc: East Hartford, CT, USA
Now that I opened the picture from the website I see how your machine works.
Do you always use 230 shot in this machine? 230 is too large for this type of set up in my opinion.


Edited by Walter (10/26/20 04:21 PM)

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#1505 - 10/27/20 12:02 AM Re: Increasing of the intensity [Re: Walter]
Tim Offline
Member

Registered: 10/26/20
Posts: 3
Yes shot 230. What should I change in your opinion? Is that nozzle small? I think something with place where air and abrasive shot combines into mixture, because when I stop peening process the shot fraction spills out video link

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#1506 - 10/27/20 09:34 AM Re: Increasing of the intensity [Re: Tim]
Jack Champaigne Offline


Registered: 04/20/99
Posts: 325
Loc: Mishawaka, IN, USA
This machine should be used for abrasive blast cleaning only and not shot peening. You should seek advice from a machine builder for a proper machine.

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