Or mechanical grinding, right choice Abraziva - important factordefining processing quality wooden surface. This, at first glance, the task of verification causes a lot of questions. What kind of sandpaper is used at different stages of grinding? How to figure out marking when choosing the desired abrasive? What properties are possessed different types skins? We will answer all these and other equally important issues in the presented material.
Anatomy of the emery sheet
The sandpaper or grinding circle for grinders consist of three main components: abrasive material, substrate and binder.
Abrasive material - The substance shredded to the state of small grains. For the production of sandpaper use different types Abrasives: aluminum oxide (electrocorundant), silicon carbide, garnet, glass, elbor, etc. The size of abrasive particles determines the most important characteristic of the grinding skirt - its graininess, which we still talk in more detail.
Substrate - paper or tissue base on which abrasive material is glued. The fabric is more often used for ribbons, rolls and certain types of grinding discs. Paper is usually used for emery sheets and most types of disks. Along with paper and tissue substrates, options for polyester materials can be found.
Binder - a layer of adhesive substance holding abrasive grains. As a binder, a meter adhesive is used, a synthetic resin (more durable) or a combination of these two materials.
We understand the types of coverage
For different work With a tree: its draft processing, preparation for finishing, interlayer grinding of coatings, polishing, etc., traditionally use the following types of abrasives.
Aluminum oxide (electrocorundum) . Is different high density and resistant to fragmentation. The most common abrasive for grinding wood and metal. Recommended for grinding raw wood.
Silicon carbide . In the process of operation, the crystals of this abrasive are split, forming new cutting edges. This feature of the grains provides self-sharing of the skins and prevents its rapid clogging. Silicon carbide sandpaper is recommended to use for delicate grinding, for example, interlayer grinding of finishing coatings.
Garnet . Relatively mild mineral abrasive. It has the ability to self-slip, but quickly wear out. Traditionally, it is used for finish grinding treated and untreated wood.
Aluminum . This is aluminum oxide, which has passed additional high-temperature processing. Its abrasive properties are higher than that of an unconditional analog. It is characterized by maximum wear resistance, optimal for wood processing at various stages.
How not to make a mistake with graininess?
Graininess - the most important characteristic Grinding skins. When the beaten question sounds: what sandpaper to grind the tree - usually implies not so much type of its coating, the nature of the binder, etc., namely, the grain rate.
From grain grainability depends the suitability of emery paper to one or another type of work. At first glance, everything seems simple, but in practice the choice of the desired skirt is often complicated by confusion in marking by numbers.
It happened that modern market In active use, there are several standards of sandbreaks at once: international Classification ISO 6344 (it fully complies with the new Russian GOST R 52381-2005), the old Soviet markings (GOST 3647-80) and the American Standard (CAMI).
Table: Sitting of sandpaper grain, assignment of abrasive, labeling ratio
| Purpose Abrasive | ISO-6344 marking (GOST R 52381-2005) |
Marking according to GOST 3647-80 (Soviet Standard) |
Cami marking (American Standard) |
Grain size, microns |
|---|---|---|---|---|
|
Coarse-grained abrasives |
||||
| Rough wood processing | 40-N. | 40 | ||
| 32-N. | 50 | 315-400 | ||
| P60 | 25-N. | 60 | ||
| Primary grinding
Wooden surface alignment |
20-N. | 200-250 | ||
| 16-N. | 80 | |||
| 12-N. | 100 | |||
| P120 | 10-N. | 120 | ||
| Preparation of solid tree varieties for finishing
FINISH SELLING Soft Breeds Grinding old paint. Under painting |
8-H. | 150 | ||
| 6-H. | 220 | |||
|
Fine-grained abrasives |
||||
| Finish grinding of solid wood
Grinding between coatings |
5-H, M63 | 240 | ||
| 4-H, M50 | ||||
| Final grinding of finishing coating
Polishing |
M40 / N-3 | |||
| M28 / H-2 | 360 | |||
| Ultrathine grinding
MicroCarapine removal |
M20 / H-1 | 600 | ||
What is an open and closed abrasive sat down?
Based on the peculiarities of applying abrasive material, skins are highlighted with an open and closed mound. This is another important parameterTo pay attention to when selecting sandpaper to work with wood.
In the sandpaper with an open and semi-open beggar, abrasive grains are covered from 40 to 60% of the working surface. A rarefied grain fad prevents the rapid scoring of abrasive wood chips, resin, paint and other waste. Such sandpaper is optimal for machine grinding, wood processing under painting, working with soft and resinous wood rocks.
In sandpaper with a closed or solid fusion, abrasive grains cover the entire work surface. Such a skin is more effective when manual grinding, work S. solid rocks Tree, finishing polishing.
How to extend the life of Abrasive?
As chips and wood resin are clogged, as well as wear of abrasive grains, sandpaper loses its work properties. The scored abrasive, especially when machined grinding, leaves dark traces, crusts the fibers and thin the surface, because of which the wood does not absorb the finishing composition.
In order for abrasives to work longer, start working using a coarser skirt, gradually moving to paper with smaller grain. For soft and resinous wood breeds, use a grinding eye with a rarefied filling and a special stearate coating (dry lubricant that prevents the rapid clogging of the abrasive).
When working a grinding machine - do not hurry. Overheating of the surface leads to the softening of the binder and accelerates wear of abrasive grains. An important factor is the conditions for storing grinding material. Cold and critical humidity can lead it into disrepair. Optimal temperature Storage 15-25 ° C with relative air humidity 35-50%.
All the above cleaning methods in more than Relevant for grinding abrasives. To clean the same ordinary skins, you can use a brush with rigid plastic bristle.
And the Council, in my opinion, is just wonderful. I didn't come to mind, although I also encountered this problem ....
So, it will be about cleaning the scoring abrasive circles, ribbons, strips and others supplies For grinding tools. When working to remove old straight-colorful coating or wood coniferous rocks Even new ribbons and circles quickly come into disrepair due to the fact that the spaces between abrasive particles are clogged with paint, resin and other mutability, which, when heated, acquire a large plasticity.
At the same time, the abrasive particles are sitting on the ribbon, their faces of the island, and the grinding process no longer goes ... What to do? I used to postpone the tape into the suitcase and I got a new one (the toad did not allow you to throw out something more suitable, in the future, the material - how it was right)))).
Sergey offers an easy cleaning method. First, it is necessary to heat the abrasive surface so that the steady agent reappears some turnover again. You can do it with a construction hairdryer. 
Then take in hand metal brush And just clean all the dirt. It is not easily deleted than "on the cold". 
After that, we rejoice that it is not necessary to spend money on consumables, we dress the skin back and take care. 
Another modification of the method is the processing of scoring sandpaper by the deep-rotating lubricant WD-40 instead of its heating. It is said that the brush after WD-shki considers exactly the same as after heating ... it will be necessary to try.
The nature of damage to the grinding circle is determined by the material from which the part is made. In addition, the characteristics of the circle itself have the value. There are products on the market that have the ability to self-collecting. However, this is relevant only for those cases where wear is determined by a simple rush of grains.
It is known that the grainy surface of the grinding circle has the form of crystals. If during operation, they lose their shape, smoothed or fall inside the structure of the abrasive layer, then there is a self-sharpening of the circle. This feature is provided by the manufacturer, it delivers many amenities to the owners of such equipment.
But not every grinding equipment has the ability to self-collecting. As a rule, it is typical of only soft circles. If the grinding equipment has high hardness, then during long or excessively intensive operation can be blunted cutting edges crystals.
In practice, it is fraught with the fact that discs can break out of a bundle. Indeed, as a result of clogging or suping the top layer, the surface of the circle is produced unevenly. As a result, the geometry of the product is disturbed.
This is fraught not only by poor-quality grinding, but also by traumatic situations. Any grinding circle pays potential danger. Secure this equipment can only be if its owner has retained the initial performance features. Therefore, the question of how to clean the grinding wheel becomes paramount.
What is the insolence of the grinding tool?
Another side of the problems associated with the intensive use of circles is toasting the abrasive layer. This term in the professional environment means the process, as a result of which the chips taken from the workpiece is falling into the pores of the circle.
The cutting ability of the tool is reduced or at all comes down to zero. This is explained by the fact that the pores removed clogs together with the exterior crystals. Apoldering Abrasive entails not only a decrease in the quality of grinding, but can provoke burning. The cleaning of the grinding circle can restore the operation of the tool and its former cutting properties.
Remember! After grinding, the abrasive circle is usually clogged. This is especially manifested if the circle is fine grain. With this unpleasant phenomenon You can and need to fight: clean the tool. After all, the grinding wheel becomes literally smooth. Stones are smoothed on it, and anything can not be about any grinding.
If the elastic circle was sat down on the machine
To solve the same problem folk crafts adapted to use diamond cutting disk for cutting ceramic tile. In the end of the disk there is diamond splashes. Cleaning can be carried out from the end of the grinding circle or from the sides.
The disk movement is carried out towards the center to the edge of the circle very carefully, because there is a risk of leaving scratches on the instrument. The end part also cleales the extremely careful and within just a few seconds. After such an operation, the circle becomes new, as if he was only brought from the store.
The use of a cleaning bar is a more reliable and gentle way. Cleaning occurs during the rotation of the disk from the center to the edge. Literally a few movements of Bru, and the circle becomes like new. The grain becomes visually noticeable, and on the touch disk acquires the former roughness. You can continue grinding.
How to clean the petal grinding wheel from the resin?
Emery Circle is often used for grinding wooden details. When processing from the top layer, microscopic chips are enclosed. A tree is a resinous material, so microscopic dust, which is formed during grinding process, has a viscous structure. For the abrasive layer, this is destructive.
Skinny resinness is different. While working with pine lumber, the abrasive disk is experiencing a colossal force of friction. This process involuntarily provokes high temperatures, which, in turn, soften the resin.
As a result, abrasive will be in disrepair, since its pores are arched. The first sign that Abrasive was hammered - this is a dark bloom on the disk itself and on the workpieces. Why is it so important to know how to clean the petal grinding circle? The fact is that abrasive scored abrasive is completely unsuitable for work. It will compare the fibers of the wood that it will subsequently complicate the process of absorbing finishes and antiseptics.
How to clean the petal grinding wheel from the resin? It is easy to do with a diamond pencil. The sandpaper from the wood is cleared literally into one touch in working mode.
The cleaning bar also extends the service life of the disk and clears it almost instantly. Therefore, the bar in a professional environment immediately began to call the purification erasing gum. To clean the grinding circle from the resin, it is necessary to attach abrasive on the grinding head and lead to the working position. Bar must be spent from the center to the edge of the disk and gently in the end.
Solving how to clean the grinding wheel from the resin, you can wipe the surface of the circle with a brush or a sponge with a soft abrasive agent. With a strong planting, the use of steel brushes is allowed, but it is necessary to do this again very carefully.
Chronikulus. 31-07-2007 23:55
I make a little knife to wear in your pocket. Hand draw on the recipe from Rumoko from jeans and epoxy. Faced a problem - I pull the handle on the grinding on a drill and the sandpaper is very quickly clogged with the material and clear its problem. The current with water, but the sandpaper itself is already sprawling, or it should be dried for a long time. Tell me how you can quickly clean it. I really do not want to buy grinders in such huge quantities - Golden knife will work ...
Snowman696. 01-08-2007 12:56
qUOTE: Originally posted by chronikulus:
golden knife turns out ...
It will be possible to show friends with the words "I did, some consumables flew into N-nu ..."
bS4U32SR30. 01-08-2007 01:24
if everything is cleaned about the skin everything is cleaned.
Sandude. 01-08-2007 01:55
Rubber or bronze (or something looks like it) brush.
But the most important thing is necessary to buy a good waterproof sandpaper. In the end, it will be much cheaper.
chief. 01-08-2007 09:01
Thin wire brush (I was able to find only a drill in the form of a cup)
Chronikulus. 01-08-2007 10:25
qUOTE: Originally Posted by Chief:
Thin wire brush (I was able to find only a drill in the form of a cup)
ABOUT! There is such a thing! Thank you try
Or maybe try the rashpy or file ordinary and then the emery surface is smooth?
yes faster it turns out and more beautiful and the result is better visible - IMHO naturally
qUOTE: Originally posted by Snowman696:
It will be possible to show friends with the words "I did, some consumables flew into N-nu ..."
yes nafig wife and so grieves
qUOTE: Originally posted by Sandude:
But the most important thing is necessary to buy a good waterproof sandpaper. In the end, it will be much cheaper.
i understand that it is cheaper and there is no place to go nearby and go specifically for it as a rule of time just lacks. I'll try to clean the brush
Chapaev 01-08-2007 10:39
Manual wire brush clean, works well. As well as agree with other comrades, high-quality stacker - capital savings, it is trite less spending, it lives at times longer.
OSG. 01-08-2007 17:19
the speed is smaller - the epoxy is bred ...
or grinding on a tissue basis and even in the water grinding.
Mutant. 01-08-2007 20:19
Use instead of sandwich abrasive grid - almost not clogged. Only she is rather rude.
Chronikulus. 01-08-2007 22:17
i need a shitifkrug for a drill on Velcro
and so thought was ....
Chronikulus. 02-08-2007 11:04
2 osg.
i have the opposite problem - Epox leaves more or less easily but the fabric is the opposite bad. Stamps remain - not very beautiful
OSG. 02-08-2007 11:36
BUT! So it is like almost the finish (the current of the villi sticks) - either cyanacrylovy, or (IMHO better) diluted epoxy with acetone coat thin layer, after drying, bring to the desired view. You may have to repeat several times. Apparently the fabric was impregnated bad.
Chronikulus. 02-08-2007 12:23
i just squeezed it well and to process it so easier - you can even harvest a little
in addition, if under the press lay anyway most of Epoxies are still extruded ... And so it is not necessary to squeeze the extruded epox and thinking how to clean with the blades ... in general, it is more convenient and that's it
Buying a grinding wheel, each of us knows that the abrasive tool will work for a long timeTherefore, information on how to clean abrasives is very important for those who grind the blanks. Any grinding wheels or discs (even dense) wear out in the process of working with the surface or material. The more the tool works, the more he and its abrasive wear out.
Causes of wear and insolence of abrasive circles
Damage to the grinding circle is determined by the material from which the billet is made. You can find discs that can self-fold. Such a grinding circle will go to work where wear is determined by a simple stitching of grains.
We all know that the graininess, that is, the abrasive of the grinding wheel, has the shape of crystals. In the process of the operation of such a disc, these particles of abrasive lose their shape, with time abrasive smoothes, in this case self-sharpening of the grinding circle - simple and effective option. It is very well suited for those who use a special grinding machine.
If another machine will be used, such circles or discs should not be taken to work. If the grinding machine has a high hardness, then in the grinding process it is possible to blunt the grinding circle.
So, during grinding, discs can break out of a bundle. When clogged and planting the surface of the grinding circle is produced unevenly. As a result of such grinding, the blank will deteriorate.
Any grinding wheel should be used by the rules. Effective work The machine and grinding circles are possible if their operational characteristics are taken into account. Should the question of how to clean the grinding circle?
Another problem of discs and circles for grinding is insolence abrasive circle As a result of its use. Apoldering is called the process, as a result, chips fall into the disk, which is removed from the workpiece.
In this case, the working capacity of the grinding wheel is greatly reduced. It turns out that such a chips clogs the pores of the circle along with the exterior abrasive. The surfaction of the grinding disk abrasive affects the quality of grinding, and also increases the possibility of burning. If you clean the grinding wheel, you can start it again and use it as new.
Each should remember that after grinding the abrasive grinding circle is clogged. Especially this case concerns those circles on which there is a fine grain. Therefore, it is necessary to clean discs. Immediately after processing, the grinding circle will become smooth. When the abrasive is worn out, the grinding of such a disk cannot be discussed.
Some have found a diamond disk for themselves, which solve the problem of insolence of the grinding circle. From the end of the disk there is abrasive. Cleaning can be made from sides or from the end of the grinding circle.
Cleaning bar is more effective method Cleaning. There are enough several movements of Bru - and the disk will become new. After that, grain will be seen.
How and what to clean the petal grinding circle?
For the term of the grinding circle, several processes affect:
- Singing when the circle is clogged as a result of grinding.
- Wear when grinding disk In the processing process wear.
In such cases, the question of how to clean the grinding wheel. Because cleaning will prolong the service life this tooland it will be possible to work with him, as with a new one.
The method of cleaning the petal grinding circle is the use of a disk with diamond splashes. In order to restore the initial type of circle, it must be applied from the sides or from the end. This should be done carefully, because the surface of the grinding circle is easily damaged.
You can use a special bar for cleaning the petal grinding circle. The disk will rotate, and movements should be made to the edge from the center. In the same way, you can clear the edge of the grinding disk, in a few seconds the bar will lead it to work.
It is simply, however, there are quite a few ways and technologies of this procedure. At home you can use more simple waysSuppose to clean the grinding wheel from suping.
How to clean the grinding wheel from the resin?
For grinding wooden blanks Many use the emery circle. When treatment is carried out, chips are removed from the top layer. Since the tree is a resinous material, then the chips, which is produced in the process of grinding, viscous. This is unacceptable for the abrasive layer of the grinding circle.
Pine resinness is very high. In the process of working with such materials, the abrasive grinding disk is very erased. During grinding around high temperatures Resin softened. Therefore, abrasive quickly comes in disrepair due to the insolence of the circle.
If Abrasive has been hammered, there will be a dark flare on the grinding disk, as well as on the billets. Abrasive scored abrasive scored fibers of wood.
Clean the grinding wheel from the resin can be a special pencil. Almost immediately the sandpaper is cleared. You can use cleaning bar, which also extends the period of operation of the grinding disk and quickly cleans it. To clean the grinding petal circle from the resin follows:
- at the grinding head to attach abrasive;
- broke from the center to the edge of the end part.
The abrasive means also cleans the grinding wheel from the resin. It is enough to wipe the surface with a brush or sponge. Special brushes can only be used with a strong planting of the grinding circle, but it should be done very carefully.
Of the foregoing, it is clear how to clear the petal grinding disk from the resin, suping and extend the service life of the working tool. Using these tips in the process of work, you can high qualityly polish the surface of the material or blank.