JB/T 9881-1999 This standard is a revision of ZB J50 001-87 "Test Bar". During the revision, only editorial changes were made according to relevant regulations, and the main technical content remained unchanged. This standard specifies the structural type, basic parameters, technical requirements and inspection methods of the test bar. This standard is applicable to the test bar used to inspect the geometric accuracy of metal cutting machine tools and the relative position accuracy of parts. This standard was first issued in 1987. JB/T 9881-1999 Test Bar JB/T9881-1999 Standard download decompression password: www.bzxz.net

[CS25.080
Machinery Industry Standard of the People's Republic of China
JB/T9881-1999
Inspection Bar
1999-05-20 Issued
State Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9881-1999
This standard is a reminder of ZBJ5000187 Inspection Standard. The original version was formulated on the basis of summarizing our production experience and considering the requirements of users. Its technical content can still meet the current scientific and technological level and adapt to production and use requirements. This standard is basically consistent with the technical content of ZBJ50001-87, and has been re-edited according to relevant regulations: This standard was implemented in July 2007. The international version A and version R of this standard are both appendices of the standard. This standard was proposed by the National Machine Tool Standardization Technical Committee and the National Machine Tool Standardization Technical Committee. The responsible units for this standard are: Beijing Machine Tool Research Institute, Beijing Precision Machine Tool General Administration, Tianjin Machine Tool Repair Screw Factory, Shanghai Ermo Repair Parts Factory, etc. This standard was first issued in 1987.
Standard of the Machinery Industry of the People's Republic of China
Testing Machine
This standard specifies the structural type, basic parameters, technical requirements and operation methods of testing machines. JB/T9881999
Generation ZB 15 ()1---X7
This standard is applicable to the testing of the relative thickness of metal cutting machine tools and the relative thickness of the components. 2 Referenced Standards
The provisions contained in the following standards shall constitute the provisions of this standard through reference in this standard. At the time of publication of this standard: the versions shown are not all valid. All standards will be revised, and the parties using this standard should consider the possibility of using the latest versions of the above standards. GB/T 230-1991 | | tt | 7974—1999
JB/10036—1999
3 Type, accuracy grade
Metal Rockwell hardness test method
Technical conditions for carbon tools
Technical conditions for alloy tools
Self-clamping nets for machine tools and tool handles
Provisions for shape and position tolerance testing
Technical conditions for Rockwell hardness tester
Machine tools 1. 7:24 round can connection T tool taper handle metal exhibition hardness test and delivery
lifting and falling comparator
special material rolling hardness ratio soft sample
wheel rate method stylus type surface comparability measuring instrument, wheel seat recorder and center line wheel density loss table
Vickers hardness let technical policy
cast iron flat plate
inductive micrometer
3.1 The test method is shown in Figure 1 to Figure 6,
3.2 The accuracy grade of the test sample is shown in Table 1.
Approved by the State Machinery Industry Bureau on May 20, 1999, and implemented on January 1, 2000
Testing equipment with national standards
Testing equipment for pre-testing
4 Structure and size
Metric national standard test rod
7:24 Test sample
Hengwang standard tube
4.1 Structure and size of test sample with cone
/9881-199
Youhe City
86-20io
-7: 24
4. Main.1 The structure of the test rod and the metric round bar test sample A is shown in Figure 1, and the size is shown in Table 2. The second and fourth dimensions are as follows: S
【When manufacturing the tester of the extended part of the double-point line, the plug is rotated, but the structure remains unchanged. Kai grade
2 According to the requirements of selection and use, the center hole of the tester can be drilled inside, and the hanging hole is made on the right side. 3 Change the 0.2 No. whole steep mourning to a solid structure
J8T9881-199
79P591
xg s[x89
39-1x9c
9-1×9
JB/T9881-199
4.1.2? ：24 The structure of the 4th type is shown in Figure 2, and the size is shown in Figure 3. The longest length of the 4th type is shown in Figure 4. When the lengthened part shown in the double point and line is manufactured, the plug is moved back accordingly, but the structure does not stand. The door period can be based on the requirements of manufacturing and use. The center hole of the sample is allowed to be drilled and the inner hole can be drilled, and the hanging hole can be drilled in the non-working space. Figure 2. The same shop number is effective. The wind length is tt|| Note: 7:24 The size of the circular part is in accordance with the A-type work push tree of T3837.3 specification. 1 4.1.3 Metric dimensional test piece, the structure of type B metric dimensional test piece is shown in Figure 3, and the dimensions are shown in Table 4. 4 Note: The other dimensions are the same as those of type A. JB/T 9881-[999] 4.1.47:24 The structure of type B cone test piece is shown in Application 4, and the dimensions are shown in Table 5. [Single fire] Metric system 80~200 Limited number: Other sizes are the same as A-shaped. 4.2 Structure and size of the test rod for item A JB/T9881-1999 4.2.1 The diameter is not more than 40mm. See Figure 5 for the structure and test, and the size is shown in Table 6. According to the requirements of the application, it is allowed to make hanging holes on the non-working surface. Figure 5
Note: The size with brackets is used in the original version. 41
4.2.2 The structure of the column test sample with a diameter of not less than 50mm is shown in Figure 6, and the size is shown in Table 76
IV: Production
JB/T0881-J299
Note: According to the requirements of the system and use, the center hole of the signature sock is allowed to be used as the inner drill source, and the step hole can be drilled on the non-main surface 1 Figure 6
: The size of the sample number is not the same as the original size as much as possible
S0(750bzxz.net
The effective measurement length of the column test sample: remove the end of L/goodness for the effective measurement length, and see Table 8. Table 8
5 Technical requirements
350-80
280-240
The material of the test sample shall be T10A specified in GB/T1298 and CTWMn specified in GB/T1299, or materials with the same properties as above.
5.2 The hardness of the test measuring surface shall be greater than 660HV or 58HRC: 5.3 The test product shall be subjected to stability treatment (scratch cold treatment) 5.4 When the resistance of the test sample of the chain is tested, the contact length of the grinding shall be greater than %, and the grade 2 precision shall be greater than 85%.
5.5. For the accuracy of the test sample with mesh cone, the maximum allowable value of surface roughness is shown in Table 9; for the accuracy of the test sample between the top and the maximum allowable value of surface roughness R, see Table 10.
Test method
The screen surface circumference runout
The smoothness R
is adjusted according to the environment
. The test method is shown in Table 11.
Type length
#315~500
>00-10
21K0-150
2315-300
>500-1000
>K-16
2315-500
500-1000
1000~600
189881—1099
Inspection method
According to GB1958—19, i.e. the attached requirements (the inspection method should be Error selection identification 1-2, kitchen society error inspection plan [—1] the specified inspection method
1 piece A type swimming test sample limited to allow part of the support on the shape of iron [see figure:, the indicator head vertical support type and steel surface: the test return 360F test send difference
is calculated by the indicator reading of the largest difference.
According to the above method, the error state
is calculated by the area of ​​​​people:
2) The special test sample is supported
between the two items, in a
test cavity.
Stability support method is the same as above
A is supported between the two points of the indicator head, and the indicator head touches the reverse edge of the test sample surface. The test is carried out by the rotation test. The error is the maximum difference of the test instrument. The test is carried out on the same part of the mirror. The minimum and maximum of the path length are 2m. The axial width of the medium is not more than m, and the cone is placed in the center of the circle. Appropriate external force is applied to the cone. The angle of rotation in one direction is not more than 6D°. The cone is inspected for its properties. The test results are calculated by the worst contact ratio of the three continuous contact lines. The test instruments are reported to the following categories: 1) GR/T6300 grade 0 grade T grade table. 2) JB.T10036 specified electric micrometer 3) G/F4755 standard torque comparator, 4) JBT7974 numerical 0 light chain plate.
5) Test with V-shaped quick
round male most robust
afraid/T9891-1999
Table 11 (Complete]
1]GB[60602 specified clothing surface twist light 1 comparison sample on the scratch mouse surface and the surface material marrow resistance Xie Yi instrument format or surface light change accuracy comparison sample typical comparison
According to the test method specified in GD:T4340. Or the test method specified in GBT230 in the good 1. The marking and packaging are inspected on the surface of the test sample
7.1 On the non-J surface of the test sample, the mark is formed: 2! G16062 period specified measurement to
1GBT7664 specified hardness:.
2] GB/T2848 specified hardness tester|| tt||The manufacturer shall mark the product by itself, with the code, type and precision grade. The non-circular test sample shall also be marked with "circular number × effective measuring length", and the test sample for the short-circuit test shall also be marked with "point × length". For example: the test sample for the 5th, A-type, and B-type of the dimensional box is cut into m diameter, 50 m in length, and 2 m in precision test. 2 The packaging box of the test sample shall be marked with: manufacturer name or trademark:
b) product name;
c) specification and type;
d) precision grade.
3 The test sample shall be treated with anti-rust treatment and well packed before packaging. 7.4 The test rod shall have a product certificate
YZ 63×5002 grade
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.