This standard specifies the definition, type, basic parameters and dimensions, technical requirements, test methods, marking, packaging and transportation requirements of steel ball internal diameter dial indicators. This standard applies to steel ball internal diameter dial indicators with a graduation value of 0.01 mm and a measuring range of 3 to 18 mm. JB/T 8790-1998 Steel ball internal diameter dial indicator JB/T8790-1998 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JE/T8790-1998
Steel Ball Internal Diameter Dial Indicator
Published on July 17, 1998
National Machinery Industry Bureau
Implementation on December 1, 1998
E/8790-1998
This standard is formulated after modifying the ZJ405-87 steel internal diameter dial indicator. In order to improve the production and mold technology, the original standard has been modified as follows:
The definition of the ball internal diameter dial indicator has been modified; the working stroke of the measuring base ball has been changed to the full stroke of the measuring probe, and corresponding changes have also been made: the definition of the centering error has been modified!
The original standard 2.2 Table 1 was modified to change the measurement range from 2~-18mm to 3--18mm, and the A, B and [, 1 types were deleted: the hole depth and probe range were modified!
The original standard table was modified, and the original standard 3.7 was deleted. This case is not a standard: Delete the original standard A, and rewrite the content into the standard text. This standard will replace ZBJ43M5-87 on the date of entry into force. This standard is proposed and managed by the National Standardization Technical Committee of the State Council. The only drafting units of this standard are: Chengjian Chengji Co., Ltd., Suzhou Changfeng Tool Co., Ltd., Harbin Cutting Tool Co., Ltd., Beijing Tool Cutting Tool Co., Ltd., Shanghai Automation Instrument Co., Ltd.
The main drafters of this standard are: Tang Demin, Zhang Baofang, Yue Chengxin, Fan Yangang, and Xie Zi. —Scope
General Machinery Industry Standard of the People's Republic of China
Steel Ball Internal Diameter Dial Indicator
IB/T 87901998
Network J42nGS-8
This standard defines the meaning, type, basic specifications and dimensional technical requirements, test methods, marking, packaging and transportation requirements of steel ball internal diameter dial indicators.Www.bzxZ.net
This standard is applicable to steel ball internal diameter dial indicators with a graduation value of 0.1mm and a measurement range of 3~18mm. 2 Referenced Standards
The provisions contained in the following standards constitute the body of this standard through reference in this standard. When this standard is issued, the versions shown are valid and all markings are subject to revision. When using this standard, the parties should explore the possibility of using the new or updated version of the standard: Z3 Y003 Technical conditions for assembly of false gauges
3 Definitions
3.1 Ball diameter measuring device
Uses mechanical transmission to convert the vertical position of the fire into the movement of the pointer, and outputs the percentage to measure the number.
The difference between the two limit values ​​of the measuring head specification is calculated. 3.3 Total error of indication
The indication error measured by the probe without a basic register is calculated by compensating the difference between the highest point and the lowest point on the same half mark. 3.+
The difference between the two adjacent test points on the vertical coordinate on the indication error curve. 3.5 Variability of indication
When the measuring conditions of the measuring head are not changed, multiple tests are carried out on the same single measurement to estimate the variation of indication
3. To avoid the error
when measuring, it is necessary to ensure the difference caused by the deviation of the center of the positioning steel ball from the value of the measurement. 1 type, specification and size
41. The type of the ball-type internal diameter dial gauge is subject to the system 1. The figure does not require a detailed structure. The State Machinery Industry Bureau approved it on September 7, 1999-12-01 for implementation
The main requirements are as follows:
Ningkong Control Tea
4.2 The pre-travel, distance sensing travel and probe of the steel ball type internal diameter dial gauge The measuring range is shown in Table 1. Table 1
i.e. our field
according to the measurement data (anin>
smoke channel storage (rax:
depth measurement (uin)
technical requirements
5.1 The steel ball internal diameter percentage indicator shall not have any external reflection on the performance. 4--10
10--18
5.2 The measuring structure of the steel ball internal bell dial indicator shall move smoothly and flexibly without jamming and twitching in normal use. 5. 3 The total loss, relative error, centering error and indication variability of the ball-type internal diameter micrometer shall be as specified in Table 2. Table 2
Correction range
-ls-.ic
.tn2. n
2. fi~-3. 6
Total indication error
Band error
Indication variability
Determined centering error
3.4 The measuring force of the ball-type heat-dispersible micrometer is shown in Table 3. Measuring range
0. g~ 2. s
JB/T ST90-1998
5.5 The hardness of the measuring steel and positioning steel ball shall not be less than ·T6eHVI62HR center). 5.6 The maximum allowable surface roughness of the measuring steel ball and positioning steel ball is R,0.05T. Test method of meter
6.1 Appearance
The appearance shall meet the requirements of 5.1. 2 5.2 For the purpose of sensor inspection, it shall meet the requirements of 5.2.
6.3 Total error and relative error of indication
6.3.1 Test method
10--1x
) The meter is installed in the steel ball type internal protection meter stand. The measuring head of the meter is connected with the measuring mark of the steel ball measuring head and the meter is adjusted. The pointer of the meter is at the position of 0, mm. 5) Install the steel ball internal diameter dial gauge on the arm of the universal length measuring instrument or the special inspection fixture, so that the two measuring copper balls are in contact with the required measuring surfaces [see Figure 2), and then turn the steel ball internal diameter dial gauge to the turning point and then tighten the control device: adjust the timing micrometer to make the reading decompression to the maximum point of the probe disk, and adjust the two-minute scale to make the length indicator zero, then decrease the value by 0.05mm (the upper limit of the measurement is greater than m) or 0.1mm (the lower limit is not less than 4mm) every time the calibration is repeated until the required point of the visual head is reached: according to the indication error of each point, the indication error curve is made (see National 3), and the difference between the highest point and the lowest point on the ordinate is the total indication error; the value of the two corresponding points on the test curve on the ordinate is the corresponding error, 6nm
6.3.2 Inspection tools
JE/T 8790-1998
c Guaranteed (1mm)
The guaranteed accuracy of the universal measuring tool or special measuring tool shall not exceed 10mm within 1mm. The uncertainty of 1mm shall not exceed 1mm.
6.4 Indication variability
6.4.1 Test method
Put the ball internal diameter micrometer into the gauge, reciprocate the ball internal diameter micrometer to the rotation point, and drive it out of the control ring gauge after the white micrometer is counted. The above operation is tested 5 times on the same position of the calibration gauge. The difference between the maximum value of the 5 times and the recorded value is the indication variability:
6 4. 2 Inspection tools
Proofreading ring dynamic reading card size The maximum allowable size is 0.8m6. 5 Parent center error
6.5. 1 Test method
Use gauge blocks and gauge accessories to measure the actual size of the ring (see Figure 4). Connect the two measuring discs and the measuring surface of the measuring disc. Swing the steel ball internal diameter micrometer to count backwards from the turning point. After counting, place the steel ball internal diameter micrometer on the calibrated ring gauge to find the turning point. Then use the micrometer to measure. The difference between the two times is the centering error. 6.5.2 Inspection tools
Measure the ring gauge (the cylindrical tolerance is the allowable value of 0.8n1). Base block group (second or fourth grade):
6 Buli
6.6.1 Test method
Put the steel ball internal diameter micrometer on the two measuring balls and the special measuring The dynamometer measuring disk changes and the steel built inner diameter scale is rotated to find the turning point, and then the lifting mechanism of the special dynamometer is rotated to the starting and ending points of the tree ball inner diameter to build a percentage of the working stroke. The dynamometer indicator reading is the same.
6.6.2 Inspection workers only
The sense of these special dynamometers with lowering structures is (.1N). 6. The torsion dimension of the scale
JB/T87901998
Compare the surface roughness with the proofreading block for comparison. If there is any dispute, the scale is only calibrated on the basis of the standard.
The temperature of the steel built inner diameter scale is fast and the environment is fully resistant to
Marking and packaging
7.1. Who should bid for the steel built inner diameter scale? Manufacturer's name or registered trademark;
) Graduation value;
c) Product number:
d) The probe virtual stroke should be marked on the female probe; the force on the measuring ball should have a visible mark. 1 The packaging box of the steel ball internal diameter micrometer should be marked with: a) Manufacturer's name or registered trademark,b) Product name c) Application range d) External value 7.3 The ball-type internal diameter micrometer shall be treated with anti-corrosion before packaging, and the packaging shall comply with the provisions of the State Administration of Industry and Information Technology: the product shall not be damaged during transportation due to improper packaging. 7.4 The ball-type internal diameter micrometer that has been verified to meet the requirements of this standard shall be accompanied by a product certificate: the qualified product shall be marked with the technical standard number, product serial number and date of production.
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