This standard specifies the verification items and technical requirements, verification instruments, verification force method and verification results and treatment of enameled round wire unidirectional paint scraping tester. This standard is applicable to the verification of enameled round wire unidirectional paint scraping tester. JB/T 4279.9-1994 Verification method of enameled winding wire test equipment Unidirectional paint scraping tester JB/T4279.9-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T4279.9-1994
Verification method of test instruments and equipment for enameled winding wires - One-way paint scraping tester
Published on December 9, 1994
Ministry of Machinery Industry of the People's Republic of China
Implementation on June 1, 1995
Mechanical Industry Standard of the People's Republic of China
Verification method of test instruments and equipment for enameled winding wires - One-way paint scraping tester
1 Subject content and scope of application
JB/T4279.9-1994
Replaces JB4279.9-1986
This standard specifies the verification items and technical requirements, verification instruments, verification methods, verification results and processing of one-way paint scraping tester for enameled round wires.
This standard applies to the verification of one-way paint scraping tester for enameled round wires. 2 Reference standardswww.bzxz.net
JB/T4279.1 General principles for the verification of enameled winding wire test equipment
3 Verification items and technical requirements
3.1 The moving distance of the paint scraping device of the one-way paint scraping tester should not be less than 100mm. 3.2 The moving speed of the paint scraping device should be 400±40mm/min. 3.3 The support table of the sample should be able to rise and fall parallel to each other, and its entire plane can be in close contact with the sample. 3.4 The scraping needle should be smooth and have a diameter of 0.23±0.01mm. The scraping needle is perpendicular to the scraping direction and parallel to the sample support table. The scraping needle holder is shown in Figure 1.
/R0.115mm
3.5 The test voltage should be DC 6.5±0.5V, and the short-circuit current should be limited to less than 20mA. 3.6 When the paint film is scraped off and the exposed conductor does not exceed 3mm, the paint scraping action should be automatically stopped. 3.7 The permissible error of the scratching force is 5%.
The load and permissible error of the one-way paint scraping tester shall comply with the provisions of Table 1. Table 1
0.2≤<1.0
Approved by the Ministry of Machinery Industry on December 9, 1994
2.0≤N<5.0
5.0≤N<10.0
Implemented on June 1, 1995
Instruments for calibration
JB/T4279.9-1994
Vernier caliper, 125mm, graduation value 0.02mm. 4.1
4.2Outer diameter micrometer, 25mm, graduation value 0.01mm. 4.3Stopwatch, graduation value 0.1s.
4.4DC voltmeter, Class 1.0.
4.5 DC milliammeter, 1.0 level.
General balance, graduation value 0.1 or more; level ①. 4.6
Q-1 enameled wire test instrument (referred to as Q-1 instrument). 5 Verification method
5.1 General inspection
5.1.1 The tester is in a horizontal position.
5.1.2 Clamp a sample on the fixture, tighten and straighten it. Adjust the support table up and down to check whether the support table can be in close contact with the sample. 5.1.3 Check whether the two fixtures can rotate 120° and 240° accordingly. 5.2 Use a vernier caliper to measure the moving distance of the paint scraping device. 5.3 Use an outer diameter ruler to measure the diameter of the scraping needle. 5.4 Use a stopwatch to measure the time t from the start to the end of the scraping needle, and use a vernier caliper to measure the distance S moved by the scraping needle. The paint scraping speed is calculated according to formula (1), and the average of the three measured values ​​is taken.
V=60S/+
Wherein; V—scraping speed, mm/mina;
S—scraping needle moving distance, mm;
t——scraping needle start to stop time, s. 5.5 Use a DC voltmeter to measure the test voltage. ..**(1)
5.6 Use a DC milliammeter to measure the short-circuit current between the sweet needle and the sample. 5.7 Install a sample with a nominal conductor diameter of about 0.5mm, add the corresponding load, and start the tester. After the paint film is scraped and the machine is stopped, use a vernier caliper to measure the exposed conductor length.
5.8 Use a balance to measure the load.
5.9 Measure the scraping force error.
5.9.1 Measure the scratching force of the scraper on the specimen by using the Q-1 instrument. Place the initial load of about 5N on the code rack and calibrate the digital graduation lines of 1.0, 1.1, 1.2, 1.3, 1.4, 1.5 and 2.0 on the scratching force coefficient scale. For the one-way paint scraping tester that can directly display the scratching force, calibrate at about 5N, 5.5N, 6N, 6.5N, 7N, 7.5N and 10N. 5.9.2 Calculate the scratching force error according to formula (2): Where: 8--scratching force error,
force value measured by the Q-1 instrument, N;
K--reading on the scale;
N. Initial load, N.
KN. -G
Measure 3 times. The average error of the measured value at each measuring point should be within ±5%. 6 Handling of verification results
1 A verification certificate shall be issued to qualified enameled round wire one-way paint scraping testers, and a verification result notice shall be issued to unqualified ones. The cover of the verification certificate and 6.1
JB/T4279.9-1994
Verification result notice is shown in the appendix of JB/T4279.1. 2 The verification cycle of enameled round wire one-way paint scraping testers is generally set at 1 year. 6.2
Additional remarks:
This standard was proposed and managed by the Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Cable Research Institute of the Ministry of Machinery Industry and others. The main drafter of this standard is Zhu Bing.
People's Republic of China
Mechanical Industry Standard
Enameled winding wire test equipment verification method One-way paint scraping tester
JB/T 4279.9 -1994
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Format 880×1230
Edition X, XX, 19XX
Printing 1-xXX
Postal Code 100044)
Sheet X/X
Number of words XXX,XXX
Printing x, XX, 19XX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn61-662
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