Some standard content:
ICS 21. 100. 20
Machinery Industry Standard of the People's Republic of China
JB/T10235-2001
Rolling bearings
Tapered roller
Technical specifications
Rulling bearingsTapered roller--Technical specifications2001-05-23 Issued
China Machinery Industry Federation
2001-10-01 Implementation
JB.T10235—2001
This standard is formulated for the first time.
The appendix A of this standard is the appendix of the standard.
This standard is proposed by the China Rolling Bearing Standardization Technical Committee. The originating unit of this standard is the China Rolling Bearing Research Institute, and the main drafter of this standard is Ma Haogu.
Machinery Industry Standard of the People's Republic of China
Technical Conditions for Tapered Roller Rolling Bearings
EollingbearlngsTapered roller-Technicel specificasions【Scope
JB/F10235-2U01
This standard defines the quality level, technical requirements, test and inspection methods, inspection specifications, marking and packaging of tapered rollers for rolling bearings and commercial products (hereinafter referred to as rollers). The production standard is applicable to the production, inspection and user acceptance of rollers for rolling bearings and commercial products (hereinafter referred to as rollers). 2 Referenced Standards
The provisions contained in the following standards become the provisions of this standard through reference in this standard. When the standard is published, the versions shown are all valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T307.3-1996 General technical rules for undulating bearings GB43801984
Methods for determining error in degree Two-point and three-point methods GE/T6930—1986
Driving bearings
JB,T[255—2001
JB/T 3034—1993
JB,T 6642—1993
JB/T 705J—1993
JB/T736J—1994
JR.T R196—1996
JH/T 8831-·200t
JBTB921:1999
3 Technical specifications, symbols and definitions
Island carbon chromium bearing steel bearing parts heat treatment technical conditions rolling bearing oil anti-rust packaging
Rolling bearing parts roundness difference test plate change evaluation force method rolling bearing parts surface roughness test plate and net force method rolling bearing parts hardness test force method
Rolling fine bearing rolling element magnetic skin its evaluation force method rolling bearing parts dense carbon heat treatment technical conditions dynamic bearing and force commodity parts inspection rules The following terms not given a definition shall be in accordance with the provisions of 0B6930. 3.1 Case wide nominal diameter, D
Roller man increase including the imaginary real negative car diameter and flat and the largest theoretical diameter. 3.2 Roller single diameter. D
3.3 Average diameter of roller in single plane, D
3.4 Variation of roller diameter in single plane, Vm
3.5 Nominal length of roller, L
3.6 Measuring chain length, 20
3.1 Source angle, 20
In any axial plane of the roller, the difference between the angle between the two lines on the roller surface and the nominal cone angle of the roller. Approved by China Machinery Industry Federation on 20101-05-23 and implemented on 2001-10-01
3.8 Grid error AG
3.9 Roller reference end to moving, S
JB/T10235-2001
The difference between the maximum and minimum axial distances of each point on the circumference of the circumference of the roller from a radial number at a distance of 1.2 times the maximum inverted dimension of the roller on the reference end face of the roller, centered on the axis of the roller. 3.10 Concentrated roller gauge value
The diameter difference range defined by the upper and lower deviations of the inner diameter of the roller in a single plane from the nominal diameter in the radial plane of the middle length of the roller.
3.11 Standard value batch
For a batch of rollers with the same nominal size and the same tolerance, the single-plane mean diameter D and the cone angle of these rollers are within the same standard value. Www.bzxZ.net
3.12 Standard value batch diameter variation, VuwL
In the same standard value batch, the difference between the single-plane mean diameter of the roller with the smallest single-plane mean diameter and the roller with the largest single-plane mean diameter.
3.13 Standard value batch, length
In the same standard value batch, the sum of the angular contact angles of the roller with the largest single-plane mean angle and the roller with the smallest single-plane mean angle. 4 Shape and size
The shape of the roller is as shown in the figure! , the chamfer of the roller should be an arc surface, and the shape and size of the roller end surface should comply with the requirements of the design department. Figure 1
4.2 The outer dimensions of the roller should comply with the requirements of the manufacturer's product drawings. 5 Technical requirements
5.1. Materials and thermal treatment
The roller is made of the materials given in Table 2 of G0/T307.3199%6. Its hardness and thermal treatment quality should comply with the requirements of JB1255 or JB/T8881.
5.2 Tolerance
S.2.1 Publication
JB 10235-2001
The roller is divided into grades I, II, II, and III according to the manufacturing size, tolerance and surface roughness, and the accuracy is from high to low. 5.2.2 Tolerance value
The size and shape tolerance of rollers of various tolerance grades shall be in accordance with the provisions of Table 1: The tolerances specified in the standard shall conform to the specifications of the product sample 1
Form and position tolerance
) This value is within the effective length of the spot, expressed in radial inches. 5.3 Surface roughness
The surface roughness of rollers of various tolerance grades shall be in accordance with the provisions of Table 2: Table 2
Tolerance grade
Surface
Base surface
.0.125
Original angle difference
The following is the recommended
Standard batch size changes and
----mtx
Standard surface, negative cloth
5. 4 Liquid attenuation line
JB/E 10235—2001
The shape of the rollers with various tolerances and the protrusion of the convex rollers and the quick-shaped rollers shall be determined according to the product drawings. 0. The straightness of the I line shall meet the requirements of Table 3.
5.5 The residual magnetism
The limit of the magnetism shall not exceed the provisions of the specification
The diameter,
The maximum limit of the magnetism:
5.6 Appearance quality
Male grade
The surface of the roller is allowed to have a few wrinkles, and the surface is not allowed to have visible defects and rust. +2
The roll angle should be the same, and the coordinate dimensions of the same roller shall not have obvious differences, and the difference shall not exceed half of the roll angle dimension tolerance.
5.7 Other
For special technical requirements, it can be determined by the subscriber and the manufacturer through consultation. 6 Measurement method
6.1 Appearance
The appearance of the filter should be inspected in person. 61 Tolerance
6.2.1D, Dm, V are measured by two-point method. Generally, the value measured on a radial plane in the middle of the filter length is taken as the measured value of the filter.
In addition, D can also be measured from the end face and compared with the standard filter. 2.2Vm: The difference between D at half the filter length from the large end face and the average radial value in the plane of the largest filter in the specification batch is calculated as:
%2.3 Product; Follow the method shown in Figure 2a), place the filter on a V-shaped block (rack), roll the roller for one circle, and the maximum value shown in the test shall not exceed the specified value in the table [. The method shown in Figure 2] can also be used. Roll for one circle, and the maximum value shown in the test shall not exceed twice the value of S specified in the table. 4
JB/T 18235—2001
6.2.4 The measurement of the angle of the roller chain shall be carried out by comparing it with the standard with an instrument. 6.3 The measurement of the roughness of the roller surface shall be carried out in accordance with the provisions of 3B7051. 6.4 When measuring the shape of the base or the protrusion of the profiled roller, the measured roller shall be placed on the instrument and the roller shall be adjusted so that the two ends of the profile are at the same horizontal position. The two measuring heads of the measuring instrument shall be adjusted so that the measuring heads are within the half plane of the axis and perpendicular to the measuring line. The whole length of the profile except for the eighth part shall be marked. The measured trace is the shape of the base line. The measured difference between the end and the middle of the profile is the protrusion of the profiled roller or the profiled roller. See Figure 3 for the measurement diagram. Dongchubeizhizhi's
enterprise chief appraiser internal measurement
6.5. Reference end face shape
The shape of the reference end face of the roller is checked with an instrument, and it is also allowed to use a sample to check. f Hardness
The measurement of the joint hardness is in accordance with the provisions of 1B/T 361. Dingmag
JB/T10235-2001
The measurement of rolling magnets shall comply with the provisions of B/8196 6.8 cracks
Rolling crack inspection shall comply with the force method specified in Hall B 1255 . 7 mark
7.1 mark. Contents
) Type: round button inlay.
b) The nominal size is: D, × Lw × 2@, the unit (mm) is not marked, c) The tolerance level is specified: do not connect the (0), , Ⅱ, Ⅱ marks. d) Rolled gauge value: expressed by upper and lower deviations, the unit (ratio m) is not marked. e! The standard pushing number and charging technical condition code that met the requirement were dropped. 7.2 Marking method
In the inspected order form, the certificate of conformity should be placed on the packaging micrometer with the mark, and the order of the content of 7.1 should be marked with a blank space between each item. 7.3 Logo example
Cone quotient 9.437 × 12.48 × 4° 1/4B/Tt0235-2001 means that the mesh cone in line with January line 10235-2001 is rolled, the nominal diameter is 9.437mm, the nominal length is 12.48mm, [rounded corners According to the tolerance of 4°, the gauge value is -1, -4μm, and the variation in batch diameter is 3μm. Inspection rules
The inspection of finished rolls is in accordance with the regulations of IB/8921. 9 Packaging and storage
9,1 Packaging
0.1.1 The product rollers that have passed the inspection should be rust-proof and inner packaged in accordance with the regulations of FB door 3034, and should be packaged in handfuls of different sizes. Different tolerance levels and different groups of rolls are packed in different containers (boxes) and should not be packed properly. 9.1.1 The packaging container (box) should be marked with the logo, material, number (or weight, manufacturer name (or trademark), batch number and packaging date
9.1 Storage
After the rollers are packaged in anti-rust, they should be guaranteed not to rust within 12 months from the date of shipment under the transportation and warehouse storage conditions specified in JB/T3034
A1 reading meter measurement method.
JB/T 10235-2001
(Biaoya's Fusang)
Measurement method of degree error
Measurement method of roller pattern error 1B line 6642 When formulating, use a small measuring instrument to evaluate the accuracy of the center of the square. A-shaped block measurement method | The roundness error of the roller cloth wave number. For the double-point measuring method, the angle of the V-shaped block has a great influence on the indicator reading, and no other degree can actually fit the wave number. Commonly used; V-shaped fast angles are 60°, 90° and 120°. The ratio of the indicator reading to the actual mesh error value, that is, the amplification factor, is shown in Table A[. When determining the roundness error, the indicator reading should be divided by the amplification. Coefficient. The rolling roundness error is the largest value among the measured values of the 60°, 90° and 120° V-shaped block measuring plates measured at two points. Table A1 is placed in the coefficient
V-shaped block angle.
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