JB/T 9926.2-1999 This standard is a revision of ZBn J55 053-90 "Technical conditions for internal thread grinders". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard is part of the JB/T 9926 "Internal thread grinder" series of standards, which includes the following two parts: JB/T 9926.1-1999 Accuracy inspection of internal thread grinders JB/T 9926.2-1999 Technical conditions for internal thread grinders This standard specifies the manufacturing and acceptance requirements for internal thread grinders. This standard is applicable to internal thread grinders with a maximum grinding diameter of 200~320mm. This standard was first issued in July 1990. JB/T 9926.2-1999 Internal thread grinder technology JB/T9926.2-1999 standard download decompression password: www.bzxz.net

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Machinery Industry Standard of the People's Republic of China
JB/T9926.1~9926.2—1999
Internal Thread Grinding Machine
1999-05-20 Issued
State Bureau of Machinery Industry
Implementation on 2000-01-01
JB/T9926.2-1999
This standard is a revision of Technical Conditions 3 for Internal Thread Grinding Machines 2BmJ55053-90. During the revision, only editorial modifications were made to the relevant provisions: the technical content remained unchanged.
This standard is part of the JB/T9926&internal thread grinding machine series standards, which include the following two parts: Part 2.1-[Internal thread grinding machine accuracy inspection
JBT9926.31999 Technical conditions for internal thread grinding machines This standard replaces ZBJ5505390 from the date of implementation. This standard is proposed by the National Machine Tool Standardization Technical Committee. This standard is issued by the Grinding Machine Branch of the National Metalworking Cutting Machine Standardization Technical Committee. The responsible unit of this standard is: China Machine Tool Research Institute. This standard was first issued in July 1990,
Machinery Industry Standard of the People's Republic of China
Technical conditions for internal thread grinding machines
This standard specifies the requirements for the manufacture and acceptance of internal thread grinding machines. This standard is applicable to internal thread grinding machines with a maximum diameter of 200-320tm. 2 Reference standards
JB/T9926.21999
Zhe7BI155 053—90
The provisions contained in the following standards constitute the text of this standard through reference in this standard. When this standard is published, the versions shown are valid, and all standards will be revised. Customers who use this standard should consider the availability of the latest versions of the following standards. GBT[031—1995
GH5226.1—16
GH/9061—158%
GH157641995
JE402—[985
B/T9872-19
JE/T9874.1999
JE/T9877J999
JB:T9926.1
JB-T005]
General requirements
Table of phase parameters and their values
Industrial electrical equipment Part; Technical conditions for use General technical conditions for metal cutting machine tools
Technical conditions for safety protection of metal cutting machine tools Grinder wheel protection cover, safety protection according to technical requirements will meet the requirements of metal cutting machine tool workpiece pool Technical conditions for assembly of metal cutting machine tools Determination of cleanliness of metal pressing cutting machine tools
Precision inspection of closed-combustion grinders
General technical conditions for metal cutting machine tool systems When accepting the machine tools according to this standard, the remaining acceptance items in GB/19061, JB/T9872, JB/T9874 and other standards that have not been specified in this standard must be inspected at the same time.
Accessories and tools
The accessories and tools listed in Table 1 should be supplied randomly, approved by the National Machinery Industry Week on 1999-05-20 and implemented on 2000-01-01
Accessory name Spring
Suction pipe
Machine type Sa iron
Pregnant light balance
Sand wheel balance spindle
Grinding wheel blue disc
Disassembly only
Small parts rolling head
Full assembly 5. Safety and health
JE/T9926.2—1999
An Ai milk
Balancing silicon wheel
Balancing grinding wheel
Chulai grinding wheel
Disassembly and suppression of grinding wheel
Installation. 1 piece
Drive 1 piece
Support 1 piece
Measurement
The quantity depends on the needs of the machine
5! When the main shaft of the sand is cut and the bearing is withdrawn, the main wheel of the grinding wheel should be started after the pressure of the main wheel reaches the specified force value.
5.2 The operation of the workbench should have a limit device and a stop valve when the workbench reversing and closing fails: 5.3. The second wheel fermentation cover should comply with the provisions of JR4029, and the protection of the workbench should be reliable. 5.4 The machine tool should have a protective device, 5.5 The machine tool should have a device to stop the cooling and fly away. 5.6 The plate bed should also comply with the relevant provisions of CB/T5226.1, GB15760, 1A10051 for safety protection. 6 Processing and assembly quality 6.1 The longitudinal guide rail of the bed should take wear-resistant measures. 6.2 The bed, workbench, and second wheel frame are important castings. 2 The first effect treatment must be carried out after the half-screen cutting. 6.3 The connection requirements of the longitudinal and transverse guide rails of the bed and their matching parts are all effective. "Static positive, sliding (recording) guide rails The requirements of "rail" shall be checked, and the following requirements shall be checked according to the "particularly important" requirements: the joint surface of the head beam and the lower worktable; the joint of the wheel frame pad and the bed body; the connection between the grinding wheel frame and the grinding wheel frame; 6.5 The difference between the 5-way clearance of the mold feed wheel should not exceed 1/40. 6.6 The longitudinal force of the horizontal feed handwheel should be checked according to the three requirements of "used with belt"; the other party should check the force according to the design regulations. ? The transmission motor of the head frame [except DC motor] should be balanced and correct together with the pulley. After correction, the remaining JB9926.2-1999
The double amplitude of the vibration caused by the unbalanced mother should not exceed the following specified values: the head frame (machine pulley) is 4μm;
The inner chest grinding head (machine feed is also 2m
h.8 Connect JBT9B77 to check the cleanliness of the machine tool. During the test: the weight of the dirt and dirt inside the head frame should not exceed 500mg: 7 The machine tool idle running test
.1 The idle running time is not less than 4, and the static grinding head is only tested at one speed. After removing the grinding wheel, the temperature rise test of the main and auxiliary bearings of the second wheel is carried out , its temperature rise value shall not exceed 25%: the temperature and temperature rise of the oil tank shall not exceed the provisions of JB/T:10051. .2 The idle running rate of the grinding head shall not exceed the design specified value. 7.3 The accuracy inspection of the minimum feed disc of the grinding wheel frame shall be automatic or manual feeding, each time a minimum scale value (the minimum feed value) is avoided, and the feeding is stopped ten times. The feeding error each time shall not exceed 50% of the scale value, and the cumulative feeding error shall not exceed 100% of the scale value. The error calculation formula is Shen formula (!) and formula (2): Each time the error is
Ja, -
Continuous feed cumulative error "
Where: a-actual feed per time;
is -·Minimum nominal feed.
［2］
7.4 When the workpiece spindle is running, the difference between its actual speed and nominal speed shall not exceed 10% of the nominal speed. There shall be no jitter or vibration when running at low speed, and the excess shall not exceed 16" when running at high speed. The load test of the machine tool in the month (1
This cumulative machine tool is tested for the maximum heavy load Test and test of the machine tool main transmission system reaching the maximum power (including extraction). The weight of the largest parts and the maximum power connection are not specified and written in the instructions. 9 Machine tool accuracy test
0.1 The machine tool condition test is carried out in accordance with JD9926.1. 9.2 During the working accuracy test, the maximum allowable value of the surface roughness R of the cut internal thread and thread test piece (according to GBT10311995) is 0.63±m
9.3 The test results are tested by daily measurement method, and there is no significant effect. 9.4 The geometry G6, G7 and the working belt P1, P2, P3, P4 should be tested after the machine tool reaches a stable temperature. 13
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