SIST ISO/TR 10828:1998/TC 1:2002
(Main)Worms gears — Geometry of worm profiles - TECHNICAL CORRIGENDUM 1
Worms gears — Geometry of worm profiles - TECHNICAL CORRIGENDUM 1
Engrenages à vis cylindriques — Géométrie des profils de vis — Rectificatif technique 1
Polžaste dvojice - Geometrijske oblike polževega profila - Tehnični popravek 1
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Worms gears — Geometry of worm profiles -
TECHNICAL CORRIGENDUM 121.200GonilaGearsICS:Ta slovenski standard je istoveten z:ISO/TR 10828:1997/Cor 1:1998SIST ISO/TR 10828:1998/TC 1:2002en01-julij-2002SIST ISO/TR 10828:1998/TC 1:2002SLOVENSKI
STANDARD
SIST ISO/TR 10828:1998/TC 1:2002
ICS
21.200Ref. No. ISO/TR 10828:1997/Cor.1:1998(E)©
ISO 1998Printed in SwitzerlandATECHNICAL REPORT ISO/TR 10828:1997TECHNICAL CORRIGENDUM 1Published 1998-11-01INTERNATIONAL ORGANIZATION FOR STANDARDIZATION · ÌÅÆÄÓÍÀÐÎÄÍÀß ÎÐÃÀÍÈÇÀÖÈß ÏÎ ÑÒÀÍÄÀÐÒÈÇÀÖÈÈ · ORGANISATION INTERNATIONALE DE NORMALISATIONWorms gears — Geometry of
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This document establishes a gear tooth classification system relevant to double flank radial composite deviations of individual cylindrical involute gears and sector gears. It specifies the appropriate definitions of gear tooth deviations, the structure of the gear tooth flank classification system, and the allowable values of the gear tooth deviations. It provides formulae to calculate tolerances for individual product gears when mated in double flank contact with a master gear. Tolerance tables are not included.
This document is applicable to gears with three or more teeth that have reference diameters of up to 600 mm.
This document does not provide guidance on gear design nor does it recommend tolerances.
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This document specifies requirements for the accuracy of general-purpose hobs of 0,5 module to 40 module.
These hobs are intended for producing gears which conform to ISO 53 and ISO 54.
This document applies to hobs for spur and helical gears. It applies to solid (monobloc) and inserted blade hobs.
The elemental features of hobs are graded according to accuracy, as follows:
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— Grade 3A;
— Grade 2A;
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— Grade B;
— Grade C;
— Grade D.
Grade 4A is the highest order of precision.
In addition to the elemental tests for hobs, this document gives permitted tolerances for composite tests that are taken along the cutting edges on the line of action. The two groups of tests are not equivalent and one can choose between one or the other. If there was no previous agreement, the hob is regarded as belonging to the precision class specified if it satisfies one or the other of the two methods of inspection.
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The formulae in the ISO 6336 series are intended to establish a uniformly acceptable method for calculating the load capacity of cylindrical gears with straight or helical involute teeth.
The ISO 6336 series includes procedures based on testing and theoretical studies as referenced by each method. The methods are validated for:
— normal working pressure angle from 15° to 25°;
— reference helix angle up to 30°;
— transverse contact ratio from 1,0 to 2,5.
If this scope is exceeded, the calculated results will need to be confirmed by experience.
The formulae in the ISO 6336 series are not applicable when any of the following conditions exist:
— gears with transverse contact ratios less than 1,0;
— interference between tooth tips and root fillets;
— teeth are pointed;
— backlash is zero.
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The influence factors presented in these methods form a method to predict the risk of damage that aligns with industry and experimental experience. It is possible that they are not entirely scientifically exact. Therefore, the calculation methods from one part of the ISO 6336 series is not applicable in another part of the ISO 6336 series unless specifically referenced.
The procedures in the ISO 6336 series provide rating formulae for the calculation of load capacity with regard to different failure modes such as pitting, tooth root breakage, tooth flank fracture, scuffing and micropitting. At pitch line velocities below 1 m/s the gear load capacity is often limited by abrasive wear (see other literature such as References [23] and [22] for further information on such calculation).
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The term bevel gears is used to mean straight, spiral, zerol bevel and hypoid gear designs. If the text pertains to one or more, but not all, of these, the specific forms are identified.
The manufacturing process of forming the desired tooth form is not intended to imply any specific process, but rather to be general in nature and applicable to all methods of manufacture.
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