Replaced by JB/T 7590-2005 JB/T 7590-1994 Technical requirements for steel wave springs for motors JB/T7590-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 7590-1994
Technical Conditions for Steel Wave Springs for Motors
Published on 1994-12-09
Ministry of Machinery Industry of the People's Republic of China
Implementation on 1995-06-01
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Steel Wave Springs for Motors
Subject Content and Scope of Application
JB/T7590-1994
This standard specifies the structural type, size, technical requirements, test methods, inspection rules, packaging, transportation and storage requirements of steel wave springs for motors (hereinafter referred to as wave springs). This standard applies to steel wave springs for the basic series of small asynchronous motors and their derived series and other equipment that require axial preload, for production, inspection by manufacturers and selection and acceptance by users. 2
Reference standards
GB3525
Spring steel, tool steel, cold-rolled steel strip
GB2828Batch inspection counting shaft sample procedure and sampling table Periodic inspection counting shaft sample procedure and sampling table GB2829
Type and size
The wave spring is an elastic element with several peaks and valleys on a metal sheet ring. Its shape and size symbols are as specified in Figure 1. Figure 1
32The dimensions and tolerances of the wave spring shall comply with the provisions of Table 1. The mark
is composed of the wave spring code and the applicable bearing outer diameter number. That is, DX×Example:
Technical requirements
Applicable bearing outer diameter
Wave spring code
The wave spring shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. Approved by the Ministry of Machinery Industry on December 9, 1994
Implementation on June 1, 1995
Basic size
Limit deviation (±)
JB/T7590-1994
Basic size
Limit deviation (±)
Free height h
Basic size
Limit deviation (±)
Number of waves
2 Heat treatment and surface treatment of wave springs shall be in accordance with the requirements of Table 2. The material properties shall comply with the requirements of 5.2
in accordance with GB3525, and the thickness limit deviation shall comply with Grade P specified in GB3525.
Spring steel
65Mn or
60SiMnA
Cold rolled steel strip
GB3525
Heat treatment
Aqueous annealing and tempering
HRC45～52
(Process reference)
5.3The surface of the wave spring should be smooth, free of rust, burrs, cracks, and the oxide layer should be uniform. Surface treatment
5.4The wave curve of the wave spring should be similar to a sine curve, the cross-sectional shape should be straight, and the peaks should be evenly distributed along the circumference. 2
The size of the wave spring should comply with the provisions of Table 1. JB/T7590-1994
The working elastic force of the wave spring should comply with the provisions of Table 3. Table
Working height H
Limit deviation
Working height H
Limit deviation
After the elastic test of the wave spring, its working elastic force shall not be less than 90% before the test. After the toughness test of the wave spring, no crease is allowed. Test method
Appearance inspection: Visual inspection is adopted, and the inspection results shall meet the requirements of Articles 5.3 and 5.4. 3.0
Dimension inspection: Use corresponding measuring tools, and the measurement results shall meet the requirements of Article 5.5. Among them, the free height uses a measuring tool to measure the height of each peak one by one. As long as the height of one peak does not meet the requirements of Table 1, it is judged to be unqualified. 6.3 Working elastic force test: Place the wave spring between two parallel plates, gradually apply load to make its height reach the working height H specified in Table 3. At this time, the elastic force of the wave spring shall meet the requirements of Table 3. 6.4 Elasticity test; First, conduct a working elastic force test on the tested wave spring to obtain the working elastic force value, and then increase the load so that the distance between the parallel plates reaches 1/3 of the free height of the wave spring, and maintain the load for 24 hours. After release, measure its working elastic force again, which should meet the requirements of Article 5.7.
Toughness test: Bend the wave trough of the wave spring 90° around an 8mm round bar, and visually inspect its surface, which should meet the requirements of Article 5.8. Inspection rules
The wave spring should be inspected and qualified by the factory inspection department, and can only be shipped after the certificate of conformity is signed. The test of the wave spring is divided into factory test and type test 7.2.1
Factory test items:
Appearance inspection:
Dimensional inspection;
Working elastic force test.
Type test items:
All items of factory test,
Elasticity test;
Toughness test.
Type test is conducted in one of the following situations: new product identification,
when there are major changes in design, process,
materials:
when production is resumed after a long period of non-production; c.
normal batch production, once a year. d.
7.3 Sampling method and judgment rules
JB/T7590-1994
In factory test, appearance inspection and dimension inspection shall be sampled and judged according to the normal inspection one-time sampling regulations of GB2828, and its AQL is 7.3.1
2.5, general inspection level I, Ac=2, Re=3. In factory test, working elastic force test shall be sampled and judged according to the normal inspection one-time sampling regulations of GB2828, and its AQL is 1.5, general inspection level I, Ae=1, Re=2.
7.3.2 The unqualified items of the test items are divided into two categories, A and B; the unqualified items of A category include working elastic force test, elasticity test, and toughness test; the unqualified items of B category include appearance inspection and dimension inspection. 7.3.3 During the type test, 16 pieces are selected for each test item of each specification, and the same test item is allowed to be tested for several items at the same time. The judgment is made according to the one-time sampling regulations of the discrimination level I in GB2829. The RQL of the unqualified items of A category is 30, Ac=3, Re=4, and the RQL of the unqualified items of B category is 50, Ac=5, Re=6.
8 Packaging, transportation and storage
The wave spring is packed in a tile-board carton. Before packing, the dirt should be removed and anti-rust treatment should be carried out, and it should be guaranteed that it will not rust within half a year from the date of leaving the factory. 8.1
The packaging box should be guaranteed not to be damaged under normal transportation and storage conditions. 8.2 The packaging box of the wave spring should be marked with: a.
Manufacturer name:
Manufacturer address:
Product mark:
Trademark;
Product quantity;
Product gross weight;
Product net weight,
Factory date.
Wave springs should avoid strong collision and heavy pressure during transportation, and should be stored in a ventilated, dry, non-corrosive warehouse. 8.3
Additional instructions:
This standard was proposed and managed by the Shanghai Electric Science Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Electric Science Research Institute of the Ministry of Machinery Industry. The drafting units of this standard included Wuxi Standard Parts Factory No. 2 and Dalian Huanghai Accessories Factory. The main drafters of this standard are Ying Shancheng, Wang Wenguang, Chen Zhijie, and Wang Changyou. 4
People's Republic of China
Mechanical Industry Standard
Technical Conditions for Steel Wave Springs for Motors
JB/T7590-1994
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