Previous Thread
Next Thread
Print Thread
#287 06/23/09 05:07 AM
Joined: May 2009
Posts: 6
M
Member
OP Offline
Member
M
Joined: May 2009
Posts: 6
Hi, does anyone have information on max. flowrates of steel shot or cut wire shot at given pressure and given nozzle diameter?
I am facing problems getting a stable media flow using 8 kg/min cut wire shot #23 (=0,8 mm) at 6 bar through a 6 mm nozzle. All machine settings are correct and media flow is stable until 4 kg/min. After increasing the flow, the flow starts to get unstable.

Any recommendations and/or info is welcome.

Joined: Apr 1999
Posts: 341
Likes: 1
J
Member
Offline
Member
J
Joined: Apr 1999
Posts: 341
Likes: 1

Joined: Mar 2014
Posts: 25
A
Member
Offline
Member
A
Joined: Mar 2014
Posts: 25
dear Sir

do u have any information about how suction blast machine work and any data of suction blasting nozzle, abrasive use , and flow rate of it with use of steel shot , glass bead , and other abrasive use in blasting process.

thanks
amit89

Joined: Mar 2014
Posts: 25
A
Member
Offline
Member
A
Joined: Mar 2014
Posts: 25
Dear Sir,
Can u explain one thing given Media floe chart page no “X-103 9-67”
how to maintain this two thing Column 1 & 2 ?

how it possible to at 80 PSI flow rate will different 14.4 lbs/ min in column 1 and 58.2 lbs/min in column 2?

I required technical detail because of I want to select the Magna valve to control cut wire flow rate.

It possible to use magna valve for cut wire blasting by nozzle?

Wait for your positive reply.
amit89

Joined: Apr 1999
Posts: 341
Likes: 1
J
Member
Offline
Member
J
Joined: Apr 1999
Posts: 341
Likes: 1
Column one is the setting to achieve maximum intensity.
Column two is the setting that will deliver the maximum amount of media.The intensity is reduced during the maximum media flow rate.

You should select the MagnaValve with 30 pound/minute calibration (model 578-24). You must specify the type of media and its size and your intended flow rate when you place your order.

Joined: Mar 2014
Posts: 25
A
Member
Offline
Member
A
Joined: Mar 2014
Posts: 25
dear Sir,

thanks for your reply.

but how can we set in one machine this two column?
but my flow rate between 1 to 10 kg/min.

its applicable for cut wire abrasive?

Wait for your positive reply.
amit89

Joined: Apr 1999
Posts: 341
Likes: 1
J
Member
Offline
Member
J
Joined: Apr 1999
Posts: 341
Likes: 1
The 578-24 MagnaValve can be calibrated in metric to 0-10 Kg/minute. It will work with cut wire abrasive but only if it is pre-conditioned to become round (spherical).
You would normally use chart #1 for peening applications. Chart #2 is provided for reference only. It shows the maximum amount that can be delivered but this is wasteful and actually reduces the peening intensity.

Joined: Mar 2014
Posts: 25
A
Member
Offline
Member
A
Joined: Mar 2014
Posts: 25
dear sir

thanks for your positive reply

thanks
amit89

Joined: Mar 2014
Posts: 25
A
Member
Offline
Member
A
Joined: Mar 2014
Posts: 25
Dear Sir

Related to my media flow rate I have below detail.
Cut wire Size :0.028" (0.7mm) Hardness 58-60 HRC
Peening Intensity: ALMEN Value :0.016" to 0.022" (0.4 to 0.55mm)
Coverage at Tooth flank and Root : 200% (To be passed twice through machine)
Pressure 4-5 kg / sq. cm
dimension of job
For pinion
Diameter Minimum =65 mm, Maximum = 200 mm
Width/Height Minimum =190 mm ,Maximum = 340 mm
For gear
Diameter Minimum =250 mm ,Maximum = 500 mm
Width/Height Minimum =35 mm ,Maximum = 70 mm

So in how much time I will get this peening intensity for both case gear and pinion.

And also suggest me magna valve for getting this intensity with cut wire.

if u want to share how to calcualte and get this please share sir.

thanks
amit89

Joined: Apr 1999
Posts: 341
Likes: 1
J
Member
Offline
Member
J
Joined: Apr 1999
Posts: 341
Likes: 1
You need to better understand coverage and intensity. The MagnaValve sets the media flow rate. You expose your part for some period of time making dents.
The intensity is determined by type/size/hardness of media and its velocity (air pressure). So, the question about how much time to get intensity does not make sense. Intensity is the setting of the machine parameters for blast stream energy. You measure the intensity by using Almen strips and a saturation curve (4 or more strips and Dr. Kirks Solver program).
You will have to experiment with exposure time to get 100% coverage, or complete denting of the part. Then, of coarse, you double the time or do a second pass to get you 200% coverage.

Last edited by Jack Champaigne; 04/14/14 12:41 PM.

Link Copied to Clipboard
Sponsored by Electronics Inc. © 2024 Electronics Inc. All Rights Reserved.
Powered by UBB.threads™ PHP Forum Software 7.7.5