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GB/T 22092-2018 PDF in English


GB/T 22092-2018 (GB/T22092-2018, GBT 22092-2018, GBT22092-2018)
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GB/T 22092-2018: PDF in English (GBT 22092-2018)

GB/T 22092-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 17.040.30
J 42
Replacing GB/T 22092-2008
Micrometer head and depth micrometer
with electronic digital display
ISSUED ON. MAY 14, 2018
IMPLEMENTED ON. DECEMBER 1, 2018
Issued by. State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Type and basic parameters ... 6 
5 Requirements ... 8 
6 Inspection methods ... 11 
7 Test methods ... 14 
8 Marking and packaging ... 15 
Micrometer head and depth micrometer
with electronic digital display
1 Scope
This Standard specifies the terms and definitions, type and basic parameters,
requirements, inspection methods, test methods, marking and packaging of
micrometer head and depth micrometer with electronic digital display.
This Standard is applicable to the micrometer head with electronic digital
display with a resolution of 0.001 mm, a range of less than or equal to 50 mm,
and the depth micrometer with electronic digital display with an upper limit of
measurement range of 300 mm.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 1216-2018 External micrometer
GB/T 2423.3-2016 Environmental testing - Part 2. Testing method - Test Cab.
Damp heat, steady state
GB/T 2423.22-2012 Environmental testing - Part 2. Tests methods - Test N.
Change of temperature
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB/T 1800.2-2009 Geometrical product specifications (GPS) - Limits and fits
- Part 2. Tables of standard tolerance grades and limit deviations for holes
and shafts
GB/T 17163-2008 Glossary of terms used in dimensional measuring
instruments - General terms
GB/T 17164-2008 Glossary of terms used in dimensional measuring
instruments - Product terms
4.2.4 The lower limit of the measurement range of depth micrometer with
electronic digital display shall be an integral multiple of 0 mm or 25 mm.
5 Requirements
5.1 Appearance
5.1.1 The surface of micrometer head with electronic digital display and depth
micrometer with electronic digital display shall not have defects such as cracks,
scratches, bumps, rust, burrs, etc. which affect the appearance and service
performance.
5.1.2 The plating and coating on the surface of micrometer head with electronic
digital display and depth micrometer with electronic digital display shall not have
falling off and other defects such as uneven color which affect the appearance.
5.1.3 The digital display of the electronic digital display device shall be
transparent, clean, free of defects such as scratches, bubbles, etc. which affect
the reading.
5.2 Material
5.2.1 The base plate of depth micrometer with electronic digital display shall be
made of alloy tool steel, stainless steel, or other materials with similar properties.
5.2.2 The micrometric screw and measuring rod shall be made of alloy tool steel,
stainless steel, or other materials with similar properties. The measuring
surface shall be inlaid with cemented carbide or other wear-resistant materials.
5.3 Interaction
5.3.1 The micrometric screw and nut, within the full range, shall be fully meshed,
and the fit shall be good. There shall be no jamming and obvious axial float.
5.3.2 The fit between the smooth cylindrical portion of micrometric screw and
the shaft sleeve shall be good. There shall be no obvious radial swing.
5.4 Force measuring device
The micrometer head with electronic digital display and depth micrometer with
electronic digital display shall be equipped with a force measuring device. The
measuring force which acts on the measuring surface by the force measuring
device shall be between 4 N~10 N. The change of the measuring force shall be
no more than 2 N.
5.5 Locking device
5.8.3 The flatness tolerance of base plate measuring surface with a length of
50 mm of depth micrometer with electronic digital display shall not exceed 1.5
μm. The flatness tolerance of base plate measuring surface with a length of 100
mm shall not exceed 2.0 μm.
5.8.4 The perpendicularity error of the micrometric screw measuring surface of
micrometer head with electronic digital display against its axis shall not be
greater than 0.6 μm.
5.8.5 When the measuring surface of the measuring rod of depth micrometer
with electronic digital display is flat, the parallelism tolerance between the
measuring surface of measuring rod and the measuring surface of base plate
shall not exceed the requirements of Table 1.
5.9 Scale mark
The scale mark on micrometer head with electronic digital display and depth
micrometer with electronic digital display shall be in accordance with the
provisions of 5.9 in GB/T 1216-2018.
5.10 Electronic digital display device
5.10.1 Function keys. The function keys of the electronic digital display device
shall be flexible and reliable. The marked symbols or image-text shall be clear
and accurate in meaning.
5.10.2 Digital display. The digital display of the electronic digital display device
shall be clear, complete, and free of flash jump. The word height shall not be
less than 4 mm.
5.10.3 Error of division. The error of division of the electronic digital display
device shall not exceed 0.002 mm.
5.10.4 Numerical drift. The numerical drift of the electronic digital display device
within 1 h shall not be greater than its resolution.
5.10.5 Communication interface. The electronic digital display device shall be
equipped with communication interface. The communication interface of the
electronic digital display device shall be a USB, RS-232, or wireless interface.
The manufacturer shall be able to provide the communication cables,
communication protocols, and communication software between the electronic
digital display device and other equipment.
5.10.6 Degree of protection. The electronic digital display device shall be
waterproof and dustproof. Its degree of protection shall not be lower than IP40
(SEE GB/T 4208-2017).
The flatness in the area of 0.4 mm from the edge of the measuring surface of
micrometric screw and measuring rod and the area of 1 mm from the edge of
the measuring surface of base plate is negligible.
6.1.2 Hardness. For measuring surfaces without cemented carbide or other
wear-resistant materials inlaid, the hardness of the measuring surface can be
inspected on the measuring surface or at the location 1 mm from the measuring
surface.
For measuring surfaces with cemented carbide or other wear-resistant
materials inlaid, the hardness may not be inspected.
6.1.3 Perpendicularity. The perpendicularity error of the measuring surface of
the micrometric screw of micrometer head with electronic digital display can be
inspected by an autocollimator.
6.1.4 Parallelism. The parallelism error between the flat measuring surface of
measuring rod and the measuring surface of base plate of depth micrometer
with electronic digital display is inspected when the indication error is inspected.
When inspecting, USE gauge block with a size of approximately 1/2 of the
measurement range. At four positions perpendicular to each other between the
two measuring surfaces in the range of 1.5 mm (excluding the chamfer of
measuring surface of the gauge block) from the edge of the measuring surface
of measuring rod, gauge blocks are placed respectively for measurement. The
difference between the maximum and minimum of the measured reading is its
parallelism error.
6.2 “Zero” value error
When inspecting, firstly INSTALL 0 mm~25 mm measuring rod, and
CALIBRATE the zero position of depth micrometer with electronic digital display;
then REPLACE the measuring rod; and MEASURE the gauge block of the lower
limit of size of the measuring rod. The difference between the displayed value
of depth micrometer with electronic digital display and the actual size of the
gauge block is the “zero” value error.
The depth micrometer with electronic digital display equipped with proofreading
column is not inspected for “zero” value error.
6.3 Electronic digital display device
6.3.1 Error of division. The error of division is uniformly inspected at 25 points
along the measurement direction within 1 circle. When inspecting, the
difference between the displayed value of the electronic digital display device
and the reading value of micro-drum for each point under inspection is read out.
The error curve is made. The difference between the highest point and the
7.2 Temperature change test
The temperature change test of micrometer head with electronic digital display
and depth micrometer with electronic digital display shall comply with the
provisions of GB/T 2423.22-2012.
7.3 Damp heat test
The damp heat test of micrometer head with electronic digital display and depth
micrometer with electronic digital display shall comply with the provisions of
GB/T 2423.3-2016.
7.4 Electrostatic immunity test
The electrostatic immunity test of micrometer head with electronic digital display
and depth micrometer with electronic digital display shall comply with the
provisions of GB/T 17626.2-2006.
7.5 Electromagnetic immunity test
The electromagnetic immunity test of micrometer head with electronic digital
display and depth micrometer with electronic digital display shall comply with
the provisions of GB/T 17626.3-2016.
8 Marking and packaging
8.1 The micrometer head with electronic digital display and depth micrometer
with electronic digital display shall be marked with.
a) Manufacturer’s name or trademark;
b) Measurement range;
c) Resolution;
d) Product serial number;
e) When the degree of protection is higher than IP40, it shall be marked with
the sign for the degree of protection.
8.2 The nominal size of length shall be marked on the proofreading column.
8.3 The packaging box of micrometer head with electronic digital display and
depth micrometer with electronic digital display shall be marked with.
a) Manufacturer’s name or trademark;
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.