HG/T 3079-1999 Rubber and plastic roller size tolerances HG/T3079-1999 Standard download decompression password: www.bzxz.net

Record number: 40671999
HG/T3079—1999
This standard is equivalent to the international standard ISO6123-3:1985 "Rubber or plastic covered rollers, Part 3: Dimensional tolerances", and is revised from the chemical industry standard HG/T.3079--1988 "Rubber roller dimensions". The technical content is equivalent to the international standard, but the writing format is slightly different.
HG/T3079-1988 (1997) was formulated with reference to ISO6123-3:1985, which only specifies the dimensional tolerances of rubber rollers, and does not define plastic rollers. During the revision process, after soliciting opinions from standard users, in order to meet the needs of plastic roller production, this standard adopts ISO6123-3:1985, specifies the dimensional tolerance of plastic rollers, and changes the name of the standard to "Dimensional Tolerance of Rubber and Plastic Rollers". Some translation errors in the original standard are corrected; and editorial changes are made. From the date of implementation, this standard will replace HG/T3079--1988 (1997). This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Rubber Miscellaneous Products Technical Committee of the National Rubber Standardization Committee. The drafting units of this standard are: Beijing Rubber Products Design and Research Institute, Daizhou Rubber Roller Factory, Hebei Province. The main drafters of this standard are: Song Baoqing, Huang Tianye, and Zhang Huaiqin. This standard was first published in 1988 as the national standard GB9896-1988 "Dimensional Tolerances of Rubber Rollers". In 1997, it was adjusted to the chemical industry standard and renumbered as HG/T3079--1988 (1997). The original GB9896-1988 was abolished. 370
HG/T3079-1999
ISO before
ISO (International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of formulating international standards is usually carried out by ISO technical committees. Any member body interested in a project for which a technical committee has been established has the right to participate in the committee. International organizations, both governmental and non-governmental, in contact with ISO may also participate in this work. ISO works closely with the International Electrotechnical Commission (IEC) on all aspects of electrotechnical standardization. Draft international standards adopted by technical committees are circulated to member bodies for voting. When published as international standards, at least 75% of the voting member bodies are required to vote in favor.
International Standard ISO6123-3 is prepared by ISO/TC45, Technical Committee on Rubber and Rubber Products. 371
1Fangtuan
Chemical Industry Standard of the People's Republic of China
Dimensional tolerances of rubber or plastics covered rollers
Dimensional tolerances of rubber or plastics covered rollersHG/T3079—1999
idt ISO 6123-3 : 1985
Replaces HG/T3079—1988
This standard specifies the grade and test method of dimensional tolerances of rubber and plastic rollers (hereinafter referred to as rubber rollers). 2Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T2941—1991 Standard temperature, humidity and time for environmental conditioning and testing of rubber specimens (eqvISO471:1983) GB/T1182-1996 General rules, definitions, symbols and drawing representation methods for shape and position tolerances (eqvISO1101:1996)
3 Definitions
This standard adopts the following definitions.
3.1 Rubber and plastic rollers
Made of a cylindrical metal roller core covered with rubber or plastic. According to the requirements of use, rubber rollers of various sizes and hardness grades can be made. 3.2 Middle height
The difference between the diameter of the central section of the rubber roller and the diameter of the end section is called the middle height. Note:
The middle height of the rubber roller is usually positive. When the end diameter of the rubber roller is larger than the central diameter, it is called the reverse middle height. 2 The middle height is generally symmetrical with the center line of the rubber roller, and this center line is also the center line for measuring the middle height. 3 There are usually two types of mid-height:
Conical mid-height: The diameter of the rubber roller changes linearly along the axis. Nonlinear mid-height: The diameter of the rubber roller changes nonlinearly along the axis, such as cosine mid-height. 4 Usually the mid-height contour starts from 50mm from both ends of the rubber roller cover surface, or descends from the end of the edge in a sloped, chamfered or smooth surface. The mid-height profile is described by these ten readings, that is, it is determined by the corresponding 21 rubber roller cross-sectional diameters. 3.3 Mid-height tolerance
The tolerance zone is the area between the two envelope lines of a series of circles with a diameter of the tolerance value. 3.4 Cylindricity tolerance
The tolerance zone is the area between two coaxial cylindrical surfaces with a radius difference of the tolerance value. 3.5 Radial runout tolerance
The tolerance zone is the area between two concentric circles with a radius difference of the tolerance value in any measuring plane perpendicular to the datum axis and with the center on the datum axis.
4 Measurement method
4.1 Ambient temperature for measurement
Approved by the State Administration of Petroleum and Chemical Industry on August 12, 1999372
Implementation on October 1, 2000
HG/T3079—1999
The ambient temperature for measurement shall comply with the provisions of GB/T2941. The rubber roller shall be placed at the test temperature for at least 16 hours before testing to ensure temperature equilibrium.
Since temperature has an impact on the test results, when comparing a series of results, the test shall be conducted at the same test temperature. When the conditions cannot be met, in order to correctly compare the test results, the impact of temperature on the rubber compound shall be considered and the temperature shall be recorded during the test.
4.2 Measuring instruments
4.2.1 The diameter and length of the rubber roller can be measured with a vernier caliper, tape measure, caliper and micrometer gauge. 4.2.2 Cylindricity and mid-height can be measured with a vernier caliper, micrometer or caliper gauge with a micrometer. 4.2.3 Circular runout should be measured with a micrometer. 4.2.4 When using a caliper, micrometer caliper or other detector for measurement, the corresponding pressure should be applied to the different hardness ranges of the rubber roller.
Hardness ≥ 35IRHD (Shore A): The applied pressure is (22±5) kPa. Hardness < 35IRHD (Shore A): The applied pressure is (10±2) kPa. 5 Rubber roller size tolerance classification
According to the type and use requirements of the rubber roller, this standard specifies six grades. XXP: Extremely high precision grade.
XP: High precision grade.
P: Precision grade.
H: High standard grade.
Q: Standard grade.
N: Non-standard grade.
For a specific rubber roller, different levels of dimensional tolerance can be selected in Chapters 6 to 10. Note: Generally, the tolerance of low-hardness rubber is larger than that of high-hardness rubber, so the highest precision tolerance level is not applicable to all rubber rollers of hardness. If the required dimensional tolerance level is not specified, the N-level tolerance is usually selected. 6 Diameter tolerance of rubber roller
6.1 The diameter tolerance of the rubber roller is determined by the length, rigidity and hardness of the rubber coating. When the thickness of the rubber coating is determined, the diameter tolerance should be the tolerance of the sum of the roller core diameter and twice the thickness of the rubber coating. The tolerance is allowed to change in both positive and negative directions. For example: the allowable tolerance is ±0.4mm, which can also be expressed as: +0.2
6.2 When the rubber roller has sufficient rigidity and the length of the rubber coating of the rubber roller is within 15 times the diameter of the roller core, the diameter tolerance of the rubber roller is specified in Table 1.
International hardness
Shore A hardness
50~~70
>70～<100
PJ hardness
120~70
<70～10
International hardness
Shore A hardness
PJ hardness
Nominal diameter of rubber roller/mm
>63~～≤100|| tt||>100～≤160
>160~≤250
>250～≤400
400~630
HG/T3079—1999
Table 1 (end)
Diameter deviation/mm
Note: XxP——For rubber rollers with a diameter greater than the standard diameter of 630mm, the tolerance is determined by negotiation between the supplier and the buyer. Q
±1, 1
6.3 When the rubber roller has sufficient rigidity and the length of the rubber coating on the rubber roller is 15 to 25 times the diameter of the roller core, the diameter tolerance of the rubber roller is specified in Table 2.
International hardness
Shore A hardness
>70～<100
PJ hardness
120~70
70～10
Nominal diameter of rubber roller/mm
>40～≤63
>63～≤100
>100～≤160
>160~≤250
250400
>400~≤630
Diameter deviation/mm
6.4 When the rigidity of the rubber roller is insufficient or the length of the coating rubber is more than 25 times the diameter of the roller core, the diameter tolerance shall be agreed upon by the supply and demand parties 7 Rubber series Coating rubber length tolerance
7.1 The coating rubber length tolerance shall be as specified in Table 3. 374
Nominal length of rubber coating/mm
>250～≤400
>400~≤630
>630~≤1 000
>1000~～≤1 600
>1600~≤2500
>2 500
HG/T3079—1999
Length tolerance/mm
Note: XP grade is only applicable to rubber rollers without rubber coating on both ends, and the rubber coating end faces and the roller core end faces are required to be in the same plane. The rubber coating length tolerance should be determined by the actual length of the roller core instead of the nominal length of the rubber coating. 7.2 The rubber coating length tolerance can be changed in both positive and negative directions. For example: the allowable tolerance is ±0.8mm, which can also be expressed as: +0.4
Radial runout tolerance
8.1 The radial runout tolerance of the rubber roller depends on the hardness of the rubber coating and the diameter of the rubber roller. When the thickness of the coating is constant, the radial runout tolerance is determined by the sum of the roller core diameter and twice the thickness of the coating. 8.2 When measuring the radial runout tolerance, the line speed shall not exceed 30m/min. 8.3 For rubber rollers with sufficient rigidity, the radial runout tolerance (see Figure 1) shall comply with the provisions of Table 4; when the rigidity of the rubber roller is insufficient, the tolerance shall be agreed upon by the supplier and the buyer.
Figure 1 Circular runout tolerance
International hardness
Shore A hardness
50～70
>70～<100
PJ hardness
120～70
<70～10
Nominal diameter of rubber roller/mm
>40~～≤63
>63~≤100
>100～~≤160
>160～≤250
>250～≤400
>400～≤630
9 Cylindricity tolerance of rubber roller
HG/T 3079—1999
Circular runout tolerance r/mm
9.1 The cylindricity tolerance depends on the diameter of the rubber roller and the hardness of the coating rubber. When the hardness of the coating rubber is determined, the cylindricity tolerance is determined by the sum of the core diameter and twice the thickness of the coating rubber.
9.2'For rubber rollers with sufficient rigidity, the cylindricity tolerance (see Figure 2) shall comply with the provisions of Table 5; when the rigidity of the rubber roller is insufficient, the tolerance shall be agreed upon by the supplier and the buyer.
Figure 2 Cylindricity tolerance
International hardness
Shore A hardness
>70~～<100
PJ hardnesswww.bzxz.net
120~70
<70～10
Nominal diameter of rubber roller/mm
>40～≤63
>63～≤100
>100～≤160
>160～≤250
>250～≤400
>400～≤630
Middle height tolerance of rubber roller
HG/T3079-1999
The middle height tolerance of rubber roller (see Figure 3) shall comply with the requirements of Table 6. XP
Cylindricity tolerance t/mm
Height tolerance in Figure 3
Nominal height/mm
>0.10～≤0.16
>0. 16～≤0. 25
>0. 25～~≤0. 40
>0.40~≤0.63
>0.63～~≤1. 00
>1.00～~≤1.60
>1. 60~≤2. 50
>2. 50~≤4. 00
HG/T3079—1999
Medium height profile tolerance s/mm
Note: The medium height tolerance of the nominal medium height above 4.00 shall be agreed upon by the supplier and the buyer. 378J Hardness
120~70
<70～10
Nominal diameter of rubber roller/mm
>40～≤63
>63～≤100
>100～≤160
>160～≤250
>250～≤400
>400～≤630
Middle height tolerance of rubber roller
HG/T3079-1999
The middle height tolerance of rubber roller (see Figure 3) shall comply with the requirements of Table 6. XP
Cylindricity tolerance t/mm
Height tolerance in Figure 3
Nominal height/mm
>0.10～≤0.16
>0. 16～≤0. 25
>0. 25～~≤0. 40
>0.40~≤0.63
>0.63～~≤1. 00
>1.00～~≤1.60
>1. 60~≤2. 50
>2. 50~≤4. 00
HG/T3079—1999
Medium height profile tolerance s/mm
Note: The medium height tolerance of the nominal medium height above 4.00 shall be agreed upon by the supplier and the buyer. 378J Hardness
120~70
<70～10
Nominal diameter of rubber roller/mm
>40～≤63
>63～≤100
>100～≤160
>160～≤250
>250～≤400
>400～≤630
Middle height tolerance of rubber roller
HG/T3079-1999
The middle height tolerance of rubber roller (see Figure 3) shall comply with the requirements of Table 6. XP
Cylindricity tolerance t/mm
Height tolerance in Figure 3
Nominal height/mm
>0.10～≤0.16
>0. 16～≤0. 25
>0. 25～~≤0. 40
>0.40~≤0.63
>0.63～~≤1. 00
>1.00～~≤1.60
>1. 60~≤2. 50
>2. 50~≤4. 00
HG/T3079—1999
Medium height profile tolerance s/mm
Note: The medium height tolerance of the nominal medium height above 4.00 shall be agreed upon by the supplier and the buyer. 378
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