JB/T 10027-1999 This standard is a revision of ZB J42 028-88 "Square Ruler". During the revision, only editorial changes were made according to relevant regulations, and the technical content was not changed. This standard specifies the structural type and size, accuracy level, technical requirements, test methods, marking and packaging of square rulers. This standard is applicable to square rulers used to test the shape error and position error of metal cutting machine tools and other machinery. This standard was first issued on June 21, 1988. JB/T 10027-1999 Square Ruler JB/T10027-1999 Standard download decompression password: www.bzxz.net

IC5 25.660.20
Machinery Industry Standard of the People's Republic of China
JB/T100271999
Square ruler
Sguiregauge
1999-05-20 Issued
State Bureau of Machinery Industry
2000-01-01 Implementation
JB/T10027—1999
This standard is based on ZB142028—88 "polygonal square". The technical content of this standard is consistent with ZBJ42028-88, and only the relevant provisions have been re-edited. This standard replaces ZBJ42028-8B from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Measuring Tools and Instruments, and the responsible drafting unit of this standard is: Precision Machine Tool Arrangement General Station. This standard was first issued in 1988.
Mechanical Industry Standard of the People's Republic of China
Square Square
Square gaugc
E10027-1999
代营7BJ42028--8
This standard specifies the structural type and size, accuracy level, technical requirements, testing methods, labeling and packaging of square angle rulers. This standard is applicable to the force angle rulers used to test the shape error and position error of metal cutting machine tools and other mechanical devices. Structure type and size
The structure type of square angle rulers is divided into three types: type 1, type Ⅱ and type 2. The structural type described is shown in Figure 1, Figure 2 and Figure 3, and the size is shown in Table 1
Approved by the State Machinery Industry Bureau on May 20, 1999 and implemented on January 1, 2000
1! 8 When the ruler is manufactured, R is not specified. JB/T10037-1999 Figure 2 Industrial model 3 Accuracy grade JB/T10027-1999 3.1: The accuracy grade of the protractor is divided into 000, 0, 0 and 1; the accuracy values ​​are shown in Table 2. Table 2 is the parallelism of the two measuring planes and the parallelism of the line plates. Note: The accuracy of the flatness and point-line accuracy of the measured values ​​shall not exceed 5. The range of 2.5m at the intersection of each measuring point is not checked. 3.2 The surface roughness R of the protractor is shown in Table 3. Table 3
Indicator
Scratching
4Technical requirements
4.1 The sharp edges of the square ruler should be trimmed, and the width between the two surfaces should not be greater than 0.5mm. 4.2 The square ruler should be demagnetized.
4,3 The front and back surfaces of the square ruler shall not have obvious appearance defects and rust. The other surfaces of the square ruler shall be painted, and the surface shall not have obvious color unevenness and shedding. 4.4
4.5 The engraving of the square ruler shall be on the same side, and the markings shall meet the standard. 4.6 The loose material of the square ruler shall be GCr15, CrWMn and other materials with the same or better material properties. The hardness of the measuring surface of the square ruler shall not be less than 6HV (5VHRC4.7
The square ruler shall be subjected to stability (cooling) treatment. 4.8
Parallelism of the two sides
5 Testing method
JB/10027-199
The testing of the square ruler shall be carried out in a room with a temperature of 20℃±2℃ and a temperature change of no more than 1℃ within 1h. Before testing, the oil stains on all parts of the square ruler must be wiped clean with gasoline or industrial alcohol, and then the square ruler shall be placed at the testing place at a constant temperature for no less than 4h. The testing method is shown in Table 4.
The flatness of the surface
The precision of the surface
is shown in Figure 4. The measuring head with the indicating number is placed on the upper edge of the square ruler and recorded. No reading effect, and then use the color negative ruler in turn! Strict, [V surface and the diseased surface are pulled in contact, and the readings are scattered\, respectively: Formula to calculate:
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Consulting angle
Flatness error - generally use equal thickness lower war diameter detection. When using flat product detection, the light wave of the flat surface measurement surface is transmitted in the direction of the self-contact with the inspection surface, and the plane error of the inspected surface is determined based on the degree and direction of the interference band. Its size is calculated by the following formula: 3*8x
In the formula: The following is the ratio of the bending degree! - The light energy used is m
Liu for the surface torsion and the square ruler greater than or equal to 02, and other methods can be used for detection.
High error length is used for self-calibration inspection: During the inspection, the correction plate is placed on the square ruler, and the reflection eye is abandoned on the forbidden plate. See Figure 5. Make accurate readings based on the image from the radiation mirror, and then measure the bridge board from one side to the other side in turn. And record the error (cause). The torque comparator with a scale value not greater than 0.5 μm and the electric micrometer with a scale value not greater than 0.2 μm are evaluated. The diameter of the test piece is 100mm or above, and the first-level plane is flat. The interferometer has a graduation position not greater than 0.2". The autocollimator and other instruments are relatively parallel to the measurement. The two micrometers on the measuring surface should be parallel to the plane of the wine on both sides. t||Degradation degree
Other quality
6 Marking and packaging
JE/T10027-1999
Table 4 (end)
In the whole selection, the index of the selected efficiency and the decimal point is the rate of improvement of the measured surface)
Light instantaneous detection and other methods
Parallel detection method with relative measurement surface
In the measured measurement space, the smallest difference is the thickness of the plate or the surface roughness comparison block
In the measurement of low solid, detection
And the force is separated by the change with other cautious methods
1 Square angle ruler is marked:) Manufacturer name and trademark:
b) Dimensions, mm:
e) Precision grade;
d) Inspection reference angle number:
product number.
6.2 The packaging of the square ruler should be marked with:
a) manufacturer's name or trademark;
b) product name:
e) ruler size H, mm;
d) accuracy, etc.
6.3 Square rulers should be treated with rust prevention before packaging and properly packed. Inspection fee
0 Flat plate with a weight of more than ten
will be sequential!
Greater than or equal to the center of the gauge
Strength angle ruler
0 installed above the flat
Same as serial number 3
Surface roughness of sugar tiger
The instrument of this test
hardness tester
6.4 Square ruler shall be certified and proved to meet the requirements of this standard. Product certificate and inspection form shall be attached, and this standard number shall be marked on it.
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