GOST 3120-75
GOST 3120−75 steel wire ROFES for aircraft. Method of preliminary drawing (with Change No. 1)
GOST 3120−75
Group В79
INTERSTATE STANDARD
STEEL WIRE ROPE FOR AVIATION
Method of pre-exhaust
Steel wire rofes for aircraft. The tecnigie of preelongation
OKP 12 0900
Date of introduction 1978−01−01
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR
2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from
3. REPLACE GOST 3120−46
4. Limitation of actions taken by Protocol No. 7−95 Interstate Council for standardization, Metrology and certification (ICS 11−95)
5. EDITION (March 2002) with amendment No. 1, approved in October 1987 (ICS 1−88)
This standard applies to steel aircraft cables, used in control systems for aircraft, and establishes a method of pre-exhaust before operation.
1. EQUIPMENT
1.1. The extrusion of a rope can be made by means of any mechanism or machinery (winches, gates, etc.) with the use of pointer force (dynamometer, pressure gauge, etc.) attached to the rope, or by means of cargo, suspended from the end of the rope (if the hood is made in one end) or to block (if the hood is manufactured in multiple finishes).
1.2. Installation, the hood can be horizontal or vertical.
1.3. The diameter of the guide rollers or drum shall be not less than 1000, where
the diameter of the outer wire rope.
The radius of the grooves of the rollers or drum should be 0.5, where a
is the diameter of the rope. Maximum deviation radius of the groove 0.1 mm.
(Changed edition, Rev. N 1).
2. PREPARING FOR THE TEST
2.1. The rope, under hood, should not have structural defects.
2.2. The attachment of the ends of the rope should be done with kousei, clips, snails or any other method that does not allow slippage of the rope in places of its fastening under the action of efforts in making the extract.
2.3. Before sealing rope in the connecting fixtures of the end of his tie with a soft wire to prevent arbitrary raspletanie rope.
3. THE TEST
3.1. The cable stretching can be done at one end (Fig.1) and in a few ends (Fig.2−3).
Damn.1. Hood at one end
Hood at one end
Damn.1
Damn.2. Hood in two ends
Hood in two ends
Damn.2
Damn.3. Hood in four end
Hood in four end
Damn.3
3.2. The duration of exposure of the rope under full load — not less than 1 min.
3.3. (Deleted, Rev. N 1).
3.4. When drawing rope in a few tips the amount of force must be increased in proportion to the number of ends of the rope (see the devil.3).
3.5. Force drawing ropes set (45±5)% of the breaking strength of the rope as a whole.
3.4, 3.5. (Changed edition, Rev. N 1).
