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Abrasive Belt durability

2019-09-06 17:29 Time of views

Abrasive Belt durability

Durability is the time when the tool can be used effectively. For abrasive belt grinding, the durability of the belt is the time it takes for the belt to grind under certain grinding conditions (such as material removal rate, grinding force, grinding temperature, etc.), usually in seconds (or In hours, it is also expressed in the actual application by the cumulative amount of grinding, that is, the total amount of material (mm3) ground by the entire belt or the number of workpieces accumulated. Although this method is not strict enough, it is simple and easy to apply, and can roughly reflect the actual situation of the durability of the belt.

Abrasive Belt durability_abrasive belt_aluminium oxide abrasive belt_zirconia abrasive belt_sanding belt

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The durability of the abrasive belt is different from the durability of the grinding wheel. The latter refers to the processing time between the two dressings. The former usually cannot be trimmed, and one belt is used until it can no longer be used. Therefore, the durability of the belt is only much longer than the grinding wheel from this point of view, generally 4 to 10 hours. Its durability is shorter in heavy-duty grinding and longer in light-duty grinding. The worst may only be 10~30,min. The best abrasive belt can be used for a few days, depending on the specific processing conditions.

Abrasive Belt durability_abrasive belt_aluminium oxide abrasive belt_zirconia abrasive belt_sanding belt

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Principle of changing the abrasive belt

It is judged whether the use of the abrasive belt has expired, mainly based on the wear condition. When entering the end of wear, the service life of the abrasive belt ends, indicating that a new abrasive belt needs to be replaced. Whether the wear and tear enters the final stage is mainly reflected by the following parameters:

1) Material removal rate or grinding efficiency, when it is lowered to the specified resin, it can be considered that the service life of the belt has expired for the grinding (given grinding amount and other conditions).

2) Grinding force. When the grinding force exceeds a certain value during the grinding process, it can also be used as a sign that the life of the abrsive belt is due.

3) Grinding temperature. During the grinding process, if the grinding temperature is better than the specified standard, the life of the abrasive belt can also be considered to expire. In practical applications, the most direct way to determine whether the temperature exceeds the standard is to observe whether there is burn on the surface of the workpiece.

Abrasive-Belt 3.jpg

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The above discrimination is only seen from one aspect of the grinding performance. In actual production, production cost is also a very important factor, because premature replacement of the abrasive belt means that the tool consumption is increased, too late, the grinding efficiency is too low, the working time is increased, and the cost is increased. Therefore, to determine whether the belt should be replaced, the two must be combined, and the ultimate goal is to minimize the cost per piece. Statistics show that by the average cost analysis of a single product, when the belt grinding is carried out at the highest productivity, the life of the belt will be shortened, but this is in order to obtain the longest service life of each belt. It is more economical to use lower efficiency. For belts with high initial grinding efficiency, the most economical life may be only one-third of the life of grinding at low efficiency. Of course, replacing the blunt with the finer ones will make the processing more economical, but this is another matter.


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