JB/T 9992-1999 This standard is a revision of ZB J41 008-89 "Technical Conditions for Rectangular Spline Broaches". During the revision, the chapter on performance tests was deleted, and editorial modifications were made in accordance with relevant regulations. Other technical contents remained unchanged. This standard specifies the technical requirements for rectangular spline broaches and the basic requirements for marking and packaging. This standard is applicable to rectangular spline broaches that process small-diameter centering internal splines of general transmission accuracy in GB/T 1144-1987 "Dimensional Tolerances and Inspections for Rectangular Splines", with a differential code of H7 and groove width tolerance codes of H9 and H11. This standard was first published on the date of year. JB/T 9992-1999 Technical Conditions for Rectangular Spline Broaches JB/T9992-1999 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JBT9992-1999
Rectangular spline broach
1999-05-20 Release
Technical conditions
2000-01-01 Implementation
National Bureau of Machinery Industry
JB/T9992-1999
4 Standard is a revision of 7.BJ4100889 (Technical conditions for rectangular spline broaches). During the revision, except for the performance test list and the editorial modification in accordance with relevant regulations, other technical contents have not changed. This standard replaces ZB14100889 from the date of implementation. This standard was proposed by the National Technical Committee for Tool Standardization. The responsible drafting unit of this standard is Chengdu Tool Research Institute. The main contributors of this standard are Xing Rongnian, Liu Derong, Qianjin, and the scope of this standard is as follows:
Standard of the Machinery Industry of the People's Republic of China
Rectangular spline pull knife
Technical conditions
This standard specifies the technical requirements and marking packaging requirements of rectangular spline pull knife JB/T9992-1999
Price 14
This standard applies to the small diameter centering internal spline chain of the general transmission transmission, whose tolerance code is II7, and the width tolerance code is H9, IIT rectangular chain pull knife: 2 Reference standards||tt| | The following standards contain clauses. Read through the clauses in this standard before using them. When the clauses are added, the versions shown are valid: All the clauses will be revised. When using the standard, you should be aware of the possibility that the following standards are new versions. 1144-198? Dimensional tolerances and specifications of broaches GB3832.2-1983 Broach front handle type and basic dimensions GBT3812.3-1983 Hot knife rear handle type and basic dimensions 3 Technical requirements bzxZ.net
3.1 The surface of the broach shall not have cracks, scratches, rust and other defects that affect the performance 3. To ensure the cutting ability, the blade should be sharp and free of any tree, embedded blade and burnt part. 3.3 The connection of the tension wear groove should be smooth and not allowed to be a step. The bottom of the stock should be polished.
3.1 The surface of the tension wear groove should be as follows: The surface of the blade edge
The front of the standard tooth
The front of the rough tooth
The back of the square tooth
The sides of the chain tooth
The outer cylinder surface of the leading part and the trailing part
The center hole is made into a cone
The outer surface of the part
R, 1.6μm;
R3.2 μ.m;
R.0.63μm
R,1.25μm
3.5 The limit deviation of the outer diameter of the rough-cut teeth and the difference in the amount of tooth lift inside the adjacent teeth are as shown in Table 1 Table 1
> 0.03-0.05
> C.05.-0.06
The extreme sugar difference for direct packaging approved by the State Bureau of Machinery and Bottles Industry on May 20, 1999
± 0.02.5
Adjacent tooth rise gain
2000-01-01 implementation
JE/T9992—1999
Standard knife twist tooth control and epidemic prevention must be reported the original deviation of the outer diameter 3.6
3.6.1 The limit deviation of the original diameter of the inner lead calibration of the network cutting is in accordance with Table 2 Table 2
Inner flower chain diameter inch tolerance
> 025-0.030
The limit deviation of the outer diameter of the special cutting teeth is in accordance with the limit deviation of the outer diameter of the precision cutting and calibration teeth of the flower chain according to Table 3, Table 3
The maximum diameter of the basic size of the flower chain
32--82
88-125
The limit deviation of the outer diameter of the cutting teeth of other sizes
The limit deviation of the outer diameter of the cutting teeth of other sizes
3.6.3 The consistency of the outer diameter of the calibration teeth and the precision cutting teeth with the same size shall not exceed 0.005. The limit deviation of the width of the broach tooth is shown in Table 4.3. The basic size of the internal spline is the tolerance band. 3.8 The limit deviation of the distance between the two angles of the broach chamfered tooth and the broach reference axis is ±0.05. mm1, 3.5 The radial runout tolerance of each outer surface of the broach to the reference axis of the broach 12-t8
3.9.1 The radial runout tolerance of the broach calibration step and its two corresponding precision-cut teeth shall not exceed the two longitudinal tolerance values ​​specified in 2. The radial circular runout tolerance of the real part after the broaching is the same as the calibration tooth. 3.9.3 Except as specified in 5.9.1, the radial circular runout tolerance of the remaining parts of the broach shall be in Table 5. Table 5
The radial runout tolerance of the outer surface of the broach to the reference axis of the broach 15
>15-25
Diameter runout tolerance
JB/T9992—1999
3.9.3 The radial runout of each part of the broach shall be in the same direction. 3.10 The oblique circular runout tolerance of the broaching part axis is 0.1mm. 3.11 The symmetry tolerance of the broach spline gear to its reference center plane is in accordance with the table. The tolerance of the visual error of the broach spline is in accordance with the table. 3.11
Tolerance zone code
Basic center
When measuring the inner spline of the cutter section, the parallelism tolerance of the two measuring surfaces shall not exceed the tolerance specified in table 4. The parallelism tolerance of the broach spline surface to the broach reference axis shall not exceed the tolerance value specified in table 4. 3.14
The symmetry tolerance of the two angles of the broach chamfer facing the spline center plane is 0.05mm. 3. 15
Broach handle: front handle B/T3832.2: rear handle GB/T3832.3, 3. 16
Broach cylindrical leading part and guide part outer diameter tolerance dial. 3. 17
3.18Broach key front part outer diameter tolerance band 8. Chain rear part outer diameter limit deviation %, 13.19Broach spline width tolerance of chain leading part and rear guide part can be connected. 3.20 Limit deviation of overall length:
When the overall length of the tool is less than or equal to 1000mm
When the overall length of the tool is greater than 1000mm
Limit deviation of broaching tool:
After cutting teeth:
Calibrate tooth back angle
Measure back angle
±5 tume
3.22 Broaching tool is made of W6Mo5Cr4V2 or other high speed steel with equivalent performance. 3.23 Heat treatment temperature:
Buy gear and rear guide
Front guide
63-66HRC:
60-66HRC:
45~5B11RC:
Allow surface treatment,
4 Marking and packaging
4.1 Marking
JB/T9992-1999
4.1.1 Marking on the knife: Manufacturer and transporter Marking, product specifications, length, front angle, pulling material (ordinary high-strength steel can be unmarked, year and month,
4.1.2 The empty box of the broach should be marked with three signs: manufacturer name, place of business, product name, product specifications, drawing length: pulling material consumption (ordinary high-strength copper is not marked), number of pieces, year of manufacture, and strength number. 4.2 Packaging
The broach must be rust-proof before packaging. The packaging must be reliable and can prevent damage during transportation. The sealing period is one year.
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