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ISO 9284:2013 pdf free

ISO 9284:2013 pdf free.Abrasive grains一Test-sieving machines
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2591-1:1988, Test sieving一Part 1: Methods using test sieves of woven wire cloth and perforated metal plate
ISO 6344-1, Coated abrasives一Grain size analysis一Part 1: Grain size distribution test
ISO 6344-2, Coated abrasives一Grain size analysis一Part 2: Determination of grain size distribution of macrogrits P12 to P220
ISO 8486-1, Bonded abrasives一Determination and designation of grain size distribution 一Part 1:Macrogrits F4 to F220
Under defined operating conditions, mechanical test sieving can produce results comparable with those obtained by manual sieving.
The results obtained by using test-sieving machines shall be reproducible and shall comply with the requirements specified in ISO 2591-1, ISO 6344-1, ISO 6344-2 and ISO 8486-1.
The reproducibility of the determination of the grain size distribution of abrasive grains by means of sieving is ensured only when the appropriate testsieving machines, test sieves and operating instructions are used.
The test-sieving machine shall be fixed on to a suitable baseplate of sufficient mass in such a way that external vibrations cannot reach the machine.
The test-sieving machine shall be installed so that it is horizontal.
As an example, the type A test-sieving machine (see Figure 1) shall be fixed on a concrete baseplate having a width of at least 625 mm, a depth of 500 mm and a height of 550 mm. For the design of the concrete baseplate, as well as for the arrangement of the assembly bolts, see Figure 2.
The concrete base-plate should be placed on a vibration-absorbing board, made, for example, of hard felt, which serves also to compensate for unevenness of the ground.
The ground shall be free from vibrations, i.e. it should be natural soil. Where it is not possible to meet this requirement, the test-sieving machine should be installed in such a way that the forces and moments, which occur during the operation of the machine, are transmitted via the load-bearing structure to the foundations.
If an acoustic cabinet is used, it shall not be attached to either the sieving machine or the concrete block.
The efficiency of test-sieving machines shall be checked at appropriate intervals; in particular, the performance of the tapper and the precision of the time switch shall be checked.ISO 9284 pdf download.

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