Main characteristics of normalized series of sprayer-applicators

№
Machine name
Machine mark
Tank volume m3
Amount of tanks
1
Small-volume sprayer
ОУМ-4
0.3
1
2
Small-volume blower-sprayer
OM-630-01
0.6
1
3
Trailer blower-sprayer
ОПВ-1200-91
1.2
1
4
Liquid fertilizer applicator
ПЖУ-5
3.2
1
5
Liquid fertilizer applicator
ПЖУ-9
6.4
2


Normal linear dimensions. The series of normal linear dimensions (GOST-6636-69) with greater rounding - off of numbers comparing with main series, were elaborated on the basis of the main series.

In contrast to main series normal dimension series are denoted by letter Ra. For example, series Ra5 looks like the following: Ra=5: 0,1; 0,16; 0,25; 0,4; 0,63; 1; 1,6; 2,5; 4; 6,3; 10; 16; 25; 40; 63; 100. GOST 6636-69 covers linear dimensions in the range of f>,001-20000mm.

Linear dimensions under GOST are expedient to be used for machined surfaces, especially for fitting hole diameters, what promotes normalization of cutting, testing and measuring tools, simplifies adjustment of machines.

Main economic profit is gained by reducing number of series members, i.e. by application the lowest series, providing required dimension range, in every particular case. Normal sizes are of less importance for surfaces, which don't require accurate coordination. Series of diameters of wires, bars, of sheet thickness, linear dimensions of structural shapes are specified on the basis of normal linear dimensions.

It is irrationally to use normalized series for axial dimensions of non-machined surfaces (casting, stamping). In these cases even partial normalization of dimensions doesn't give any advantages and only makes designing and production of details more complicated. Importance of series of preferable numbers (SPN) considered above is not to be overestimated. They can't be applied for normalization in all domains of designing. SPN are expedient to be used in the cases, when it is necessary to create series of gradation of some parameter with uniform saturation of all parts of series (for example, of gear ratios of metal-cutting machine-tools).

Series of preferable numbers are unacceptable for creation of un,-fied series of machines with repeating tools. Parameters of unified series are composed according to the other laws, depending, upon real possibilities of combination of unified tools and conditions of adaptability to manufacture of series members, and they can't be put into geometric progression.

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