sandblasting effect

[Fulvio Romano]

Hello, everyone.
I have a problem. I have to get some effect on a steel piece, this degree of reflectance/diffusivity was obtained on similar pieces by sandblasting. I would like to capitalize this knowledge so as to obtain the same result even in the case of change of the supplier.

the problem is that by changing the material for sandblasting, at equal surface roughness, the result changes a lot. how many parameters do I have to take into account not to lose the result, but avoiding putting too many stakes to the supplier?

Moreover, how do you indicate a sandblasting? the term used on some drawings of "microblasting" what does it mean? gives constraints on grain, material, roughness, etc.?

 

[Er Presidente]

Hello, everyone.
I have a problem. I have to get some effect on a steel piece, this degree of reflectance/diffusivity was obtained on similar pieces by sandblasting. I would like to capitalize this knowledge so as to obtain the same result even in the case of change of the supplier.

the problem is that by changing the material for sandblasting, at equal surface roughness, the result changes a lot. how many parameters do I have to take into account not to lose the result, but avoiding putting too many stakes to the supplier?

Moreover, how do you indicate a sandblasting? the term used on some drawings of "microblasting" what does it mean? gives constraints on grain, material, roughness, etc.?

the type of material and the size of the sand are fundamental to obtain the final effect.
you have to block the size of the granules and the material, then also the mode counts (time, air pressure etc.) but it's easier to "pull them in operation".

 

[Fulvio Romano]

So? how do I give a reference to the supplier so that he knows if it's okay?
I can't make him think back. . .

 

[Er Presidente]

So? how do I give a reference to the supplier so that he knows if it's okay?
I can't make him think back. . .

you have to impose the treatment with the right sand and ask for samples.

 

[Fulvio Romano]

Um... there is therefore no way to define parameters that guarantee the result without checking it. . .
I'm... I'm sorry.

 

[desMoira]

definitely the poles for the supplier should be put on the type of abrasive required (e.g. alumina, quartz, sic...), granulometria (in mesh) and form of particles (e.g. granular, angular...). Be careful that if the abrasive is a synthetic you must also see the type of agglomerant used.

But this may not be enough to guarantee you a faithful replica of the previous treatment: actually behind a sandblasting operation there is a world of other measures. . .
Other variables are: pressure, distance from the component, angle of impact, duration of treatment, sandblaster (if you talk about reflectance means that changing operator, understood as a physical person and taking for granted that the sandblaster is the same!, it is a luxury that you cannot afford)...and also it should be considered how the previous abrasive was used before dealing with the surface of the component on which you got the desired result: in practice if the abrasive is used for the first time produces very different results than those that you have after having sanded another 50 pieces.

then consider that there are also systems in abrasive fluid bed, in practice more a erosive technology than abrasive treatment... I mean, it's a world, but if you don't beat us, you think it's worth talking about the sex of angels.

Good lav!

 

[Er Presidente]

Sure. Speaking of the sex of angels.

Good lav!

Well, you couldn't explain better!

Thank you.
:smile:

 

[Fulvio Romano]

definitely the poles for the supplier should be put on the type of abrasive required (e.g. alumina, quartz, sic...), granulometria (in mesh) and form of particles (e.g. granular, angular...). Be careful that if the abrasive is a synthetic you must also see the type of agglomerant used.

But this may not be enough to guarantee you a faithful replica of the previous treatment: actually behind a sandblasting operation there is a world of other measures. . .
Other variables are: pressure, distance from the component, angle of impact, duration of treatment, sandblaster (if you talk about reflectance means that changing operator, understood as a physical person and taking for granted that the sandblaster is the same!, it is a luxury that you cannot afford)...and also it should be considered how the previous abrasive was used before dealing with the surface of the component on which you got the desired result: in practice if the abrasive is used for the first time produces very different results than those that you have after having sanded another 50 pieces.

then consider that there are also systems in abrasive fluid bed, in practice more a erosive technology than abrasive treatment... I mean, it's a world, but if you don't beat us, you think it's worth talking about the sex of angels.

Good lav!

clear and complete treatment. Thank you so much!

 

[gil]

I often happen with stainless steels. I refer to the following parameters (e.g.):

1) material. stainless steel AISI 304
2) treatment: satin granny 320
3) finish: scoth brite

and finally the material always comes as you expect it to be. It may be that the different machining centers have slight differences as it says "des mora" but to me there have never happened sensitive differences, or more evident than those present between an aprtite and the other of the same material also from the same supplier.