This standard specifies the terms and definitions, types and basic parameters, requirements, inspection methods, marking and packaging of internal diameter indicators. This standard applies to internal diameter indicators with a graduation value or resolution of 0.01mm and 0.001mm and a measuring range of 6mm to 450mm. GB/T 8122-2004 Internal Diameter Indicator GB/T8122-2004 Standard download decompression password: www.bzxz.net

18 17,340.30
National Standard of the People's Republic of China
GB/T81222004
Replaces GB/T81221987
Dial bore indicator
gauges
2004-02-10 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of China
2004-08-01 Implementation
GB/T8122—2004
This standard is a revision of GB/T81221S874 internal diameter dial gauge 3. From the month of implementation, it replaces G/T8-22 internal diameter dial gauge
The main changes between this standard and GB/T81221087 are as follows: The internal diameter dial gauge and the internal diameter dial gauge are collectively referred to as the internal diameter indicating gauge. A digital indicating gauge is added:
The graduation value is increased to,3! mm. Inner diameter indicator: use the allowable identification pad, the definition of repeatability error to replace the total indication error and the actuality of the value change - add technical proofs and definitions of this edition 1.2.3., 1, 3.5) except for the "unreconciled definition <1967 1.3, 1.4); revised the corresponding lower length adjustment (187 edition 2.2, the core of this edition 2, revised the total indication error and adjacent error (197 edition 3.3A version 5.-) when the knife proof is revised to estimate the version of this edition,)! Modify the "measurement of the direction of the corrosion table and the relative model is only qualitatively determined (1337 edition 5. =, 3.5; this edition 5. 3.1); Increase the normal radius of the measuring surface of the car version 5, 3.2: The inspection method is no longer included in the 1937 version of the appendix A; this version>; This standard is issued by the main central area of ​​this flow industry joint platform, this standard is issued by the technical committee of the standardization of pressure, volume, H volume only. This standard does not have a wide range of companies to change the main drafting fee: Ling Ji Le, A Baoyang. The standard replaced by the dynamic version of the release situation: GH/T8.221987.
1 range
inner diameter indicator
GH/T $122--2004
This standard specifies the terms and definitions, types and cost parameters, requirements, inspection methods and markings of internal diameter indicators. This standard is applicable to internal diameter indicators with a diameter range of 6mm to 450mm, with a diameter of n01mm or n001mm.
2 Normative references
The following documents and clauses become clauses of this standard through reference in this standard. All references are Documents, their subsequent revisions (excluding other revisions) are not applicable to this standard. However, the latest versions of these documents can be used to help reach an agreement based on technical standards. The latest versions of the referenced documents in the following dates apply to this standard: G3/1?.63—1 The latest terms and definitions for ear instruments established in this standard are G3/1?.63—1 GT3/1:7:S31997 and the following terms and definitions apply to this standard. 1
Dial bore gauges
Use a mechanical transmission system to convert the linear position of the active measuring head into the angular position of the indicator on the dial. For internal dimension measuring instruments that read the dial,
adjacent error
the error value between adjacent controlled points of the inner diameter indicator. 3.3
central error
central error
the error caused by the deviation of the active measuring head and the replaceable measuring head of the inner diameter indicator from the contact point with the corresponding ring during measurement,
ertnre
working stroke
the moving range of the measuring head of the inner diameter indicator used for measurement, 3.5
preload presetcompressiontravel the compression of the inner diameter indicator head before the travel. 3.6
hand lower lengthlenthhelowgrip
cooling hand removes and says the center line of the full measuring head is the quotient, 4 types and basic parameters
4. 1 Type
Type of inner diameter indication, diagram for illustration CB/18122—2004
Moveable probe
Positioning and maintenance
Basic type
4.2 Basic parameters
Quality
Indicator
Measurement model of inner diameter indicator, working line of movable measuring head and length of handle bottom are shown in Table 1: Table 1
Division position
5 Requirements
5.1 Appearance
Measuring tape
0L 00
Tuc to Tar
:60 25G:
2.U 4.Center
15R yuan
1n0#165
The preload of the movable probe is shown in the following figure! ac.ti
Unit: meter
Tree length
Inner diameter indicator, the measuring surface of the probe shall be free from rust, scratches, etc. that may affect the performance. 5.2 Interaction
Inner diameter indicator, under normal use, the movement of the measuring mechanism shall be smooth, flexible, and free from jamming. 5.3 Measuring surface
5.3.1 The measuring surface of the inner diameter indicator shall be made of hard and durable material and have appropriate thickness. 5.3.2 The curvature of the measuring surface of the small gauge measuring head should be greater than 1/35 of the lower limit of the measurement. 5.4 The error of the inner diameter of the measuring head should be greater than 1/3 of the lower limit of the measurement. The allowable morning error, adhesion error, center error and peace error of the inner diameter measuring head should not be set by the meter 2. 2
points
Liu Lanfan Yupin
tsts:10
C- ts-1bu
Expand the knowledge recommendation
increase the knowledge error
set the center error
Note 1: The allowable course, the light protection car, the fixed inner steel Dong weight property difference is the specified value of the motherland at 20℃ Note 2: There is no zero position, the small position is the allowable end error "- the provisions after the equal sign. 5.5 Measurement force
GB/T8122-—2004| |tt||Recoverable error basisbzxz.net
Measurement of movable measuring head of inner diameter indicator, the pressure of positioning bridge should not be greater than the provisions of Table 3; at any position, the contact force of positioning bridge should be greater than the measuring force of movable measuring head. Table 3
Measurement of other purposes:
6 Inspection method
61 Allowable error and relative error
New dynamic measuring head's basic force
6.1.1 Install the indicator of the cutting machine with a value of 0.01 mm or more on the gauge stand, retract the measuring rod of the indicator so that the indicator can point to about 1 turn (or the corresponding position of the digital indicator), and the pointer should point to the upper left corner of the measuring support axis, and then tighten the indicator. Install the inner diameter indicator on the special inspection fixture (the uncertainty of the indication error within the initial length of the inspection fixture should not be greater than 2.m, and the uncertainty of the indication error within every 0.1m of length should not be greater than 1.0m), turn the measuring head on the inspection fixture, and perform a single point calibration on the inner diameter indicator to zero the indicator. Then, carefully adjust the measuring head in one direction, and perform a test every 0.1mm interval until the working end point. According to the readings of the inspection points, the calibration curve is set to determine the indication tolerance and adjacent errors. 1 10 -
Neck pressure
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm
Test the neck pressure, mm The indicating head of the measuring instrument is inserted into the smooth ring gauge (its parameters are shown in Table 4). The measuring head is moved back and forth in the plane of the measuring axis and the axis of the vehicle. The light is recorded on the surface of the ring gauge axis to the smallest reading (turning point). The reading of the indicating gauge is determined. The difference between the largest reading and the smallest reading is the error of the indicating gauge: Table 4
The inner diameter of the ring is +/mm
50-s: 360
6.3. Centering error
The surface of the ring is relatively smooth. The positioning bridge inner diameter indicator is used to detect the inner diameter indicator close to the lower limit of the plate. First, remove (or press) the positioning guard of the inner diameter indicator. Secondly, put the measuring head of the inner diameter indicator into the smooth ring gauge. When the convex surface of the ring gauge reaches the maximum reading (turning point), the maximum reading (turning point) is repeated 3 times at the same position of the smooth ring gauge. The average value is used to determine the position of the inner diameter indicator. Then install or loosen the positioning bridge and put it in a position inside the smooth ring gauge: when the ring gauge reaches the minimum reading (turning point), the half average value is used as the centering temperature of the inner diameter indicator. 6.4 Measuring force and connection pressure
6.4.1 The movable measuring bridge type inner diameter indicator shall be used for measuring the inner diameter of the measuring instrument. The measuring method shall be not less than .2N: First, assume that the axis of the movable measuring head is stable, then press the movable measuring head against the test plate, and read the two readings on the dynamometer respectively.
6.4.2 The positioning bridge type inner diameter indicator shall be used with a touch pressure sensor and shall not be disassembled. If it is greater than 2N, the measurement is planned for inspection. First, the positioning bridge inner diameter indicator is measured in the upper and lower limits of the inner diameter size. The upper and lower limits of the positioning bridge are measured. The cup is made when the positioning bridge is in this position; then the positioning bridge is contacted with an auxiliary instrument on the measuring table (the movable measuring head should be connected to the auxiliary table) and pressed down temporarily. When the positioning bridge is compressed to the upper and lower limits of the measurement, the readings are taken at the measuring points respectively: the weight of each reading should be the contact pressure value of the positioning bridge. 6.5 Calibration performance
The inner diameter indicator and the gauge shall be kept at the semi-high temperature in the calibration room for not less than 2h. 7 Marking and packaging
7.1 The inner diameter indicator shall be marked with:
: manufacturer, factory name or registered trademark:
a) continental standard;
) centigrade:
d) product serial number:
7.2 The lower limit of the measuring range or the measuring range of the measuring range may be indicated on the label of the measuring system.
7.3 The packaging box of the inside diameter indicator gauge should be marked with ) "Year of manufacture" trademark:
) Product name:
d) Channel.
GB/T 5122--2004
7.4 The inside diameter indicator gauge must be well packaged during the packaging process: the product must not be damaged during handling before transportation. 7.5
The inside diameter indicator gauge must be inspected and monitored to ensure it meets the requirements of this marking. The product certificate should be marked with the standard plate, production serial number, and date of issue.
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