GOST 18834-83
GOST 18834−83 magnetic Wire for writing of harmonic signals. Specifications (with Amendments No. 1, 2)
GOST 18834−83
Group В73
INTERSTATE STANDARD
MAGNETIC WIRE RECORDING
HARMONIC SIGNALS
Specifications
Magnetic wire for writing of harmonic signals.
Specifications
ISS 77.140.65
OKP 12 6100
Date of introduction 1985−01−01
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR
2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from
3. REPLACE GOST 18834−73
4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS
| The designation of the reference document referenced |
Item number |
| GOST 427−75 |
4.19 |
| GOST 618−73 |
4.5 |
| GOST 2991−85 |
5.2 |
| GOST 4381−87 |
4.2 |
| GOST 7376−89 |
5.2 |
| GOST 7565−81 |
4.1 |
| GOST 7566−94 |
3.1 |
| GOST 8828−89 |
5.2 |
| GOST 9569−79 |
5.2 |
| GOST 10446−80 |
4.4 |
| GOST 10994−74 |
2.2 |
| GOST 12344−88 |
4.1 |
| GOST 12345−2001 |
4.1 |
| GOST 12346−78 |
4.1 |
| GOST 12347−77 |
4.1 |
| GOST 12348−78 |
4.1 |
| GOST 12350−78 |
4.1 |
| GOST 12352−81 |
4.1 |
| GOST 12354−81 |
4.1 |
| GOST 14192−96 |
5.4 |
| GOST 15846−79 |
5.5 |
| GOST 16711−84 |
5.2 |
| GOST 21650−76 |
5.5 |
| GOST 24597−81 |
5.5 |
| GOST 28473−90 |
4.1 |
5. The expiration time limit is removed by the Resolution of Gosstandart from
6. EDITION with Amendments No. 1, 2 approved in June 1989, April 1992 (IUS 9−89, 7−92)
This standard applies to cold drawn wire of precision alloy grade 708А EI-VI, is used for recording and playback of harmonic signals of the control equipment of magnetic recording heads.
1. BASIC PARAMETERS AND DIMENSIONS
1.1. Wire manufacture diameters:
0.03 mm;
0.05 mm.
1.2. The wire on purpose are subdivided into types:
3.1; 5.1 — typical (for control parameters of the working wire);
3.2; 3.3; 5.2; 5.4 — working.
The first digit represents the wire diameter (mm) multiplied by 10, the second number is the combination of working properties.
(Changed edition, Rev. N 1).
1.3. Limit deviations of the diameter should match the table.1.
Table 1
| Wire |
Wire diameter, mm | Maximum deviation of diameter, mm |
| 5.1 |
-0,002 | |
| 5.2 |
0,050 | ±0,002 |
| 5.4 |
±0,002 | |
| 3.1 |
-0,002 | |
| 3.2 |
0,030 | -0,002 |
| 3.3 |
±0,002 |
1.4. The roundness of the wire must not exceed the limit deviation for diameter.
1.5. The diameter of the helix formed by the free length of wire must be not less than:
20 mm — for wire diameter 0.05 mm;
15 mm — for wire diameter of 0.03 mm.
Examples of symbols
Wire of alloy grade 708А EI-VI, diameter 0.03 mm, model:
3.1 wire — GOST 18834−83
Wire of alloy grade 708А EI-VI, with a diameter of 0.05 mm working type 5.2:
5.2 wire — GOST 18834−83
Wire of alloy grade 708А EI-VI, with a diameter of 0.05 mm working type with 5.4 determination of coefficient of harmonics:
5.4 wire-To-GOST 18834−83.
(Changed edition, Rev. N 2).
2. TECHNICAL REQUIREMENTS
2.1. The wire shall be made of grade EI 708А-VI in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.
2.2. The chemical composition of the alloy grade 708А EI-VI should correspond to GOST 10994.
2.3. Breaking strength in the tensile test and the abrasion of wire must conform to the standards table.2.
Table 2
| Wire diameter, mm | Breaking strength, N (g), not less | Breaking strength of wire with a node, N (g), not less |
Abrasiveness, mm/m·10 |
| 0,050 |
3,72 (380) | Of 2.25 (230) | 8 |
| 0,030 |
Of 1.37 (140) | 0,78 (80) | 8 |
2.4. The surface of the wire must be smooth, clean, no kinks, scale and tint.
On the surface of the wire allowed the presence of traces of the technological lubricant subject to compliance with the performance requirements of this standard.
Wire produced with a special surface cleaning: wire types 5.1; 5.2 clean in ultrasonic installation with an alcohol degreasing; types 3.1; 3.2 and 3.3 in a special machine to clean the wire with alcohol.
Wire type clean 5.4 electrochemical method or ultrasonic installation with an alcohol degreasing in accordance with the instructions in the order. In the absence of instructions in order method of cleaning, at the discretion of the manufacturer.
2.5. The performance characteristics of wire must conform to table.3.
Table 3
| Indicators of the working properties of the wire | The symbol indicator | The normal operating characteristics for wire types | |||||
| 5.1 |
5.2 | 5.4 | 3.1 | 3.2 | 3.3 | ||
| Relative average sensitivity, dB |
-0,5 +1,0 |
To 2.0 +2,0 |
+1,0 -5,0 |
-0,5 +0,1 |
A 1.0 3.0 a |
A 1.0 3.0 a | |
| The unevenness of sensitivity, dB, max.: | |||||||
| at 400 Hz |
±0,5 | ±1,0 | ±1,0 | ±0,5 | ±1,0 | ±1,0 | |
| at 4000 Hz |
±1,0 | ±3,0 | - | ±1,0 | ±3,0 | ±3,0 | |
| The relative amplitude-frequency characteristic, dB | |||||||
| at 200 Hz, not less |
- | - | -5,0 | - | - | - | |
| at 3000 Hz, not less |
- | - | -4,0 | - | - | - | |
| at 4000 Hz |
-1,5 +1,5 |
-4,0 +4,0 |
- | -1,5 +1,5 |
-4,0 3.0 a |
-4,0 3.0 a | |
| Harmonic distortion, %, not more |
5 | 5 (70% of the party); 7 (the rest) |
- | 5 | 5 | 7 | |
| Noise razmahnino wire, dB, not more |
-46 (-50) |
-45 (-48) |
-40 (-45) |
-37 (-43) |
-37 (-43) |
-37 (-43) | |
| The noise of a magnetized wire, dB, not more |
-37 | -37 | - | -36 (-39) |
-36 (-39) |
-36 (-39) | |
| Copyrightact, dB, not more |
-40 | -40 | - | -40 | -40 | -40 | |
| Abrasion, dB, not less |
55 | 55 | 50 | 55 | 50 | 50 | |
Notes:
1. In parentheses are the norms of working properties of wire on the stand ISPS.
2. Harmonic distortion for wire type 5.4 is determined by the requirement of the user for statistical purposes, after which it will be installed norm.
2.4, 2.5. (Changed edition, Rev. N 1, 2).
2.6. Wire produced is wound on a coil. The coil should be closely wound single length of wire.
2.7. The mass of the cut wire on the coil should conform to the standards table.4. Customer’s request wire type 5.2 produce a mass of not less than 135 g in the amount of not less than 60% of the party.
Table 4
| Wire | The mass of the cut wire on the coil, g |
The number of coils in batch, %, by mass |
| 5.1 |
Not less than 3.2 | 100 |
| 5.2 | Not less than 40,0 |
Not more than 20 |
| Not less than 70.0 |
The rest | |
| 5.4 | Not less than 40,0 |
Not more than 10 |
| 65−75 | The rest | |
| 3.1 |
Not less than 1.0 | 100 |
| 3.2 | At less than 15.0 | 100 |
| 3.3 | Not less than 30.0 | 100 |
By agreement with the consumer allowed another mass of segments of wire.
2.8. Magnetic and mechanical properties of the wire are given in Appendix 1.
3. ACCEPTANCE RULES
3.1. Rules of acceptance of wire — GOST 7566.
3.2. Wire take parties. The party should consist of wire of the same size, one batch of low-temperature treatment and furnished by a single document about quality that contains:
trademark or name of the manufacturer and trademark;
grade;
symbol wire;
the nominal diameter;
total weight;
the results of the tests;
the special cleaning wire;
the melting number.
3.3. To check the quality of wire taken from the party:
to check the size and shape of the wire, the diameter of the curl, ground, cut, surface quality and working properties (;
;
) — 100% of the coils;
to check ,
,
,
or three coils;
to check the abrasiveness — one coil;
to test breaking strength — three coils;
to check the chemical composition of one hot rolled or forged alloy from melting. At the request of the consumer sample for the determination of chemical composition the manufacturer sends along with the wire.
3.4. The test noise razmahnino wire, noise magnetized wire, operafest and abrasion to the manufacturer may be performed periodically, but not less than every fifth of melting in the three coils.
3.5. Allowed the test of abrasion to the manufacturer periodically for each tenth heat.
3.6. Allowed tested breaking strength manufacturer conduct in three coils from melting.
3.7. The chemical composition of the wire take on a quality document issued by the company, smelting the metal.
4. TEST METHODS
4.1. The chemical composition of the alloy EI 708А-VI is determined according to GOST 28473, 12344 GOST-GOST 12347, 12350 GOST, GOST 12352, 12354 series GOST or other methods providing the required accuracy of the analysis. Sampling — according to GOST 7565.
(Changed edition, Rev. N 1, 2).
4.2. Diameter and ovality of wire checked in two mutually perpendicular directions three sections cut 1 meter from the outer end of the coil optimera with divisions of not more than 0.001 mm according to GOST 4381 or other tool to ensure the required accuracy.
4.3. The surface quality is checked visually on the outer layer of wire wound on a spool.
4.4. Breaking strength of wire with knot and without knot determined on one sample from the coil to each type of tests according to GOST 10446.
4.5. Abrasivity determined using a fixture PIA-3 at the depth of cut of the plate while passing through it on 1 m of wire at a speed of 0.4 m/s, the tension of 0.49 to 0.69 N (50−70 g). Test time (3±0,5) min, the angle of wrap of the plate (160±5)°.
Define abrasiveness at a speed of passage of the wire of 3 m/s. Arbitration is the method with the speed of the passing wire 0.4 m/s.
The plate is made of rigid foil of aluminum AD1 brands, AD, A6, A5 according to GOST 618толщиной 0.07 mm, width 6 mm, length 17 mm.
Abrasiveness (), mm/m, calculated by the formula
where the depth of cut, mm;
— the length of the segment m.
The depth of cut is determined using a measuring microscope with a measuring error of ±3 µm.
Diagram of apparatus for measurement of abrasion is given in Appendix 4.
4.6. Working properties of the wire determine the stand 17 INCHES.
Allowed performance characteristics determine wire on the other stands that meet the requirements of this standard and annexes 2 and 3.
If there is disagreement in assessing the quality of wire tests carried out on stand 17 INCHES.
The test is performed at a temperature of (25±10) °C, (98·10±6·10
) PA (735±45) mm Hg. CT and humidity (50±35)%, when the speed of wire 0.1 m/s and the tension 0,49−0,73 H (50−75 g) for wire diameter 0.05 mm and 0.15−0.25 N (15−25 g) for a wire diameter of 0.03 mm, the test time of each working parameter for at least 3 min.
On a typical wire relative to the average sensitivity, the unevenness of sensitivity, the relative amplitude-frequency characteristic is determined by the entire length of the segment; the noise razmahnino wire, harmonic distortion — at the beginning and end of the segment.
Relative performance of wire type 3.1 is defined in relation to segments of the wire square 60053, the charge 9A, coil 5−1-3, like 5.1 square 42514, cage 276, coil 1−4-1.
The segments of the wire can be changed by agreement of the manufacturers and consumers.
4.5, 4.6. (Changed edition, Rev. N 1).
4.7. When testing the working properties must be used in magnetic heads, brief specifications of which is given in Annex 2.
When measured in the recording head must be made of the sinusoidal signals. The magnitudes of signals set standard values.
4.8. For the maximum recording level take a level at which nonlinear distortions in the signal recording frequency of 400 Hz on a typical wire corresponding to 5%.
For a nominal level of current recording take level 10 dB below the maximum.
A current value of the high-frequency bias (current HFI) choose the maximum sensitivity of a typical wire at a frequency of 400 Hz at a nominal level of current recording.
Current frequency HFI shall be (100±10) kHz (stand IPS — (40±4) kHz), the current Erasure (40±4) kHz (stand IPS — (20±2) kHz).
4.9. To measure the relative average sensitivity () on a wire of alloy grade 708А EI-VI and standard wire produce a recording signal frequency of 400 Hz nominal write current and a current HFI.
The measurements are carried out when the filters of high frequency of 100 Hz (ESPS — 200 Hz) and lower frequency of 5000 Hz.
The result of the measurement taking is expressed in decibels the ratio of the average output voltage of playback amplifier recording playback in the test () and model (
) wires:
where ,
the average sensitivity of the test and the model of the wire, defined by the arithmetic mean value of maximum and minimum output voltages. In determining the relative average sensitivity of the working wire should take into account the deviation of the sensitivity of the model wire from scratch.
4.10. The unevenness of sensitivity on the frequency of 400 Hz (
, the unevenness of sensitivity on the frequency of 4000 Hz (
Measurement of non-uniformity of the sensitivity is carried out by the electronic voltmeter. Take for the result expressed in decibels is the maximum deviation of the sensitivity from its average value over the entire measurement period.
Customer’s request wire types 5.1, 3.1 and 3.2 of the registration of non-uniformity of sensitivity is performed by means of the level recorder of the type H-110 or other type that meets the following requirements: write speed level recorder 200−300 mm/s lower frequency limit of 50−80 Hz, a 25 dB potentiometer, the paper speed of 0.1−0.3 mm/s. In this case, the result is taken as expressed in decibels, the maximum deviation of sensitivity from the mean value, taken at the worst section of registrarmi for the entire measurement period. A single emissions check recorder, occuring at most 10 times on 6 meters wire (6−18 mm paper) are not considered.
A single release is considered a release to registrarme corresponding to the thickness of the recording pen of recorder level.
4.11. For measuring the relative amplitude-frequency characteristics of the alloy wire 708А EI-VI sequentially recording a signal frequency of 200, 400, 1000, 3000, and 4000 Hz at a nominal level of write current when the filter 100 Hz (ESPS — 200 HZ) and 5000 Hz.
The absolute amplitude-frequency characteristic is defined as expressed in decibels of the ratio of the average output voltage of playback amplifier at frequencies of 200 Hz (); 3000 Hz (
); 4000 Hz (
) average output voltage on the reference frequency of 1000 Hz (
); 1000 Hz (
) and 400 Hz (
), respectively:
4.12. For the result of the measurement of the relative amplitude-frequency characteristic () take the algebraic difference between the amplitude-frequency characteristics of wire from alloy 708А EI-VI and model of wire:
4.13. To measure harmonic distortion () on the alloy wire 708А EI-VI recording a signal frequency of 400 Hz a maximum level of current recording. When you play a measured maximum voltage of the third harmonic of the output signal through a bandpass filter 1200 Hz using an electronic voltmeter.
For the measurement result taking the percentage ratio of the maximum voltage of the third harmonic of the amplifier output (playback) to the output voltage corresponding to the maximum recording level (
).
4.14. Noise razmahnino of wire is determined relative to the maximum recording level of the signal frequency of 400 Hz.
The rate is measured in the band of 100−5000 Hz (ESPS — 200 Hz-5000 Hz).
The result of the measurement taking is expressed in decibels the ratio of the maximum voltage at the output of playback amplifier playback signal razmahnino wire () to the average voltage corresponding to the maximum recording level (
).
4.15. To measure the noise of a magnetized wire, the alloy wire 708А EI-VI record the signal with frequency 400 Hz maximum recording level and determine the corresponding root-mean-square value of the current record. Then, without switching off the current HFI, hold the record by a constant current equal to the RMS.
The measurements were carried out in the frequency range of 100−5000 Hz (ISPS — 200−5000 Hz).
The result of the measurement taking is expressed in decibels the ratio of the maximum output voltage when recording DC () to the average value of the output voltage signal frequency of 400 Hz with a maximum recording level (
):
The count of the readings produced by the maximum deflection.
4.16. To measure copyrightact the alloy wire 708А EI-VI periodically recording a signal frequency of 400 Hz at maximum recording level. Copy is on disk, the contact between the two coils of wire. The measurement is carried out using band pass filter of 400 Hz.
The result of the test take the arithmetic mean value, expressed in decibels, of the ratio of maximum it’s a Xerox of signal () recorded (
).
4.17. To measure the attrition () of the alloy wire 708А EI-VI recording a signal frequency of 400 Hz, with a maximum record level and then record erase current of at least 150 mA (stand ISPS — 90 mA). Measurements are made with a band-pass filter 400 Hz.
The result of the measurement taking is expressed in decibels the ratio of the average strain corresponding to the maximum level (), the maximum output voltage of playback amplifier when you play the erased record (
).
4.18. The ground wire on the coil is determined on the scales with an absolute error not more than 0.1 g.
4.19. The diameter of the curl is carried out by measuring with a ruler (GOST 427) the minimum diameter of the ring formed at the free down on the horizontal surface of a segment of wire of length 1 m.
5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE
5.1. Each coil must be attached to the label, which indicate:
type of wire;
actual diameter (written as the arithmetic mean value of six measurements);
mass;
the room melt;
the room charge latest low-temperature processing;
coil number in the cage;
trademark or name of the manufacturer and trademark;
the date of manufacture.
5.2. The wire on the coils should be wrapped in paper according to GOST 16711, GOST 9569 elegost 8828 laid in serried ranks in polyethylene bags and placed in boxes of types I or II according to GOST 2991, lined inside with waterproof paper. Between the rows of coils are laid cardboard according to GOST 7376.
5.3. The mass of the packing space should not exceed 80 kg.
5.4. Transport marking under GOST 14192. The container should be handling marks «Fragile. Care», «Protect from moisture» according to GOST 14192.
5.5. Transportation of the wire is carried out by all types of transport in covered vehicles small shipments in accordance with the transportation rules on the transportation of the species.
The conditions of loading and fastening of cargo transported by rail, in accordance with the technical conditions of loading and fastening of cargoes, approved by the Ministry of Railways of the USSR.
When you ship two or more packages to one user should proceed with consolidation packages in accordance with the requirements of GOST 21650, GOST 24597.
Products that are sent to the far North and the districts equal to them, shall be Packed and transported according to GOST 15846.
(Changed edition, Rev. N 1, 2).
5.6. Storage of products must be carried out in storage rooms at a temperature of 5−35 °C and relative humidity (60±15)%.
6. MANUFACTURER’S WARRANTY
6.1. The manufacturer guarantees that the magnetic wire for writing of harmonic signals to the requirements of this standard if the conditions of operation and storage.
Warranty period of storage — 10 years from the date of manufacture.
Warranty period — 10 years from the date of commissioning within the warranty period of storage.
7. OPERATING INSTRUCTIONS
7.1. Magnetic wire for writing of harmonic signals can operate in the following conditions:
temperature — from minus 60 to plus 70 °C;
relative humidity (95±3)% and temperature (45±5) °C;
pressure — from 133·10to 2,026·10
PA (from 10
to 1. 5x10
mm Hg. calendar);
the effects of linear acceleration to 80 in any direction for 15 min;
the effects of vibration up to 15 in the frequency range from 20 to 2500 Hz for 15 min.
ANNEX 1 (reference). MAGNETIC AND MECHANICAL PROPERTIES OF THE WIRE
ANNEX 1
Reference
1. Magnetic properties:
the coercive force of not less than — (47,7·10
-79,5·10
) A/m (600−1000Э);
residual induction (0,2−0,5) T (2000−5000 Gauss).
2. Mechanical properties:
tensile strength — not less than 1960 N/mm
;
elongation — 2%.
3. The wire has corrosion resistance to sea fog humidity 100%, temperature + 40 °C for 56 days.
ANNEX 2 (informative)
ANNEX 2
Reference
INVENTORY OF MAIN STANDARDS
HEADS PLAYBACK ЛЩ3.253.308
The number of windings — 2х5000 sew-0,02 mm.
Inductance (at 1000 Hz) — (2±0,4) mH.
E. D. S. head (at a frequency of 1000 Hz, with total harmonic distortion less than 5%) is not less than 2 mV.
Frequency response relative to 1000 Hz:
at 300 Hz — not less than 4 dB
at 4500 Hz at least 15 dB.
Width of the working gap is 0.01 mm.
The depth of the working gap — 0.3 mm.
The radius of the bottom of the grooves is 0,05 mm.
The velocity of the wire is 10 cm/s.
The tension of the wire is 0.3 N (diameter 0.03 mm) and 0.5 m (diameter 0.05 mm).
The radius of treatment is 12 mm.
Warranty period — not less than 500 hours.
A LIST OF THE MAIN CHARACTERISTICS OF THE HEAD
ERASE ЛЩ3.253.606
The number of turns of the coil — 100 PEV-2 — 0,08 mm.
Inductance (frequency 110−155 kHz) — (0,14±0,028) mH.
The level of Erasure (erase current (220±30) mA frequency 40000 Hz; the recorded 400 Hz signal with nonlinear distortion less than 5%; current record (2,2±0,2) mA; a biasing current (6±0,5) mA, with the bias frequency is 40000 Hz) — at least 56 dB.
Width of the working gap — 2x0,1 mm.
The depth of the working gap is 0.25 mm.
The radius of the bottom of the grooves is 0,05 mm.
The velocity of the wire is 10 cm/s.
The tension of the carrier — 0.3 N (diameter 0.03 mm) and 0.5 m (diameter 0.05 mm).
The radius of treatment is 30 mm.
Warranty period — not less than 500 hours.
A LIST OF THE MAIN CHARACTERISTICS OF THE HEAD
RECORD ЛЩ3.253.017
The number of windings — 2х300 sew-0,04 mm.
Inductance (at a frequency of 35−50 kHz) is (4±0,8) mH.
Current recording, providing a return of not less than 250 µv (at a frequency of 1000 Hz with a total harmonic distortion less than 5%) — (2,2±0,2) mA.
The optimum biasing current (at bias frequency is 40000 Hz) — (6±0,5) mA.
Width of the working gap is 0.01 mm.
The depth of the working air gap is 0.55 mm.
Width additional clearance is 0.05 mm.
The radius of the bottom of the grooves is 0,05 mm.
The velocity of the wire is 10 cm/s.
The tension of the carrier — 0.3 N (diameter 0.03 mm) and 0.5 m (diameter 0.05 mm).
The radius of treatment is 8 mm.
Warranty period — not less than 500 hours.
Note. When checking performance on the stand ISPS should be used head:
reproducing ХС3.253.007;
recording ХС3.253.008;
erase ХС3.253.009.
APPENDIX 3 (reference). THE BASIC REQUIREMENTS FOR THE MEASUREMENT CONDITIONS
APPENDIX 3
Reference
1. The coverage angle of the magnetic heads is 160−170°.
2. Wire-drawn-out mechanism must provide the velocity of the carriers:
(0,1±0,003) m/s;
(0,2±0,006) m/s;
(0,4±0,012) m/s;
(0,8±0,024) m/s.
3. To measure the output voltage should be used measuring voltmeter type B3−40 or similar.
4. The accuracy of measurement results, parameters of the media should be no more than ±10%.
5. The filter parameters used to measure abrasion, copyrightact, harmonic, must meet the following requirements:
the attenuation of filters at the cutoff frequencies should be no more than (3±1) dB;
the attenuation of the filters in the detuning on the octave must be at least 35 dB;
the attenuation of the filters in the detuning by 1 octave must be at least 65 dB;
the attenuation in the passband of the filter should be no more than 15 dB.
6. The inherent noise of the playback amplifiers in the frequency range of 0.1−5 kHz, referred to input, when connected to a reproducing head ЛЩ3.253.308 and input signal 2 mV.eff., should not be greater than 2 µv.
APPENDIX 3. (Changed edition, Rev. N 1).
ANNEX 4 (reference). DEVICE PIA-3 FOR DETERMINATION OF ABRASION
ANNEX 4
Reference
1 — base; 2 — directing; 3 — body; 4 — roller; 5 — cover; 6 — housing; 7 — plate;
8 — guide; 9 — screw; 10 — handle; 11 — rail; 12 — clamp
ANNEX 4. (Added, Rev. N 1).
The text of the document is verified by:
the official publication of the
Wire metal. Part 3: Sat. Standards. -
M.: IPK Publishing house of standards, 2003
