This standard specifies the basic requirements for the type, size, technical requirements, marking and packaging of unified thread rolling plates (hereinafter referred to as rolling plates). This standard applies to rolling plates for processing unified threads (ANSI B1.1-82). Rolling plates are divided into two accuracy levels: Grade 1 and Grade 2. Grade 1 is applicable to processing external threads with tolerance grades 3A and 2A; Grade 2 is applicable to processing external threads with tolerance grades 2A and 1A. JB/T 8824.6-1998 Unified thread rolling plates JB/T8824.6-1998 Standard download decompression password: www.bzxz.net

IC.S 25.10.50
Standard of the Machinery Industry of the People's Republic of China
JB/T8824.6-1998
Unified thread rolling flat dies
Thread rolling flat dies for unified threads1998-12-29 Issued
State Bureau of Machinery Industry
1999-07-01 Implementation
JE/T8824.6-—1998
This standard was first issued on December 29, 1998. Former
This standard was taken and managed by the National Technical Committee for Standardization of Cutting Tools. The main drafting units of this standard: Shanghai Standard Parts Tool Factory, Shanghai Cutting Tool Factory. Scope
Standard of the Machinery Industry of the People's Republic of China
Unified thread rolling flat dies
Tbread roll Hatdies for unified threads threadsJB/T8824.6—1998
The standard stipulates the basic requirements for the type, size, technical requirements, marking and packaging of the unified frequency light thread rolling plate (hereinafter referred to as the thread rolling plate).
This standard applies to the thread rolling plates such as .L standard-thread (ANSI 1.1-82). The thread rolling plates are divided into two accuracy levels: 1 and 12. Grade 1 is suitable for machining external threads with tolerance grades 3A and 2A: Grade Z is suitable for hand-processing external threads with tolerance grades 2A and 1A.
2 Reference standards
The following clauses, which are included in the standard, constitute the present standard by citing it. The text of the standard. When this standard is published, the versions shown are valid. All standards will be revised and all parties using this standard shall consider the possibility of using the latest versions of the following standards. ANSIB1.1-82 Standard - Partial Thread
3 Types and Dimensions
3.1 The type of the thread rolling plate is as shown in Figure 1, and the dimensions are given in Table 1, Table 2 and Table 3. The movable overflow plate
Fixed thread rolling plate
To: Processing. 4aG. The installation accuracy of the chain plate controlled by 350mm thread can also be made or 90F. Guohao Machinery Industry Service 199B-12-29 Approved 1999-07-0 Implementation
JB/T B824.6-1998
Applicable range
Nu.J -Nu.3
No.1 ~ No.4
No.2~ Nu.5
No.2..Na8
No.3 - No.10
Mo.4 -No.12
No.12 - 5/16
174-7/16
5/16-2/16
5/16~1/2
Explosion code
No.1-64UNC
No.2-56UNC
No.3-48 UMC
Ns.440IINC.
No.540UNC
No.6-32 UNC
No.I0-24 LNC
Ni.12-24 INC
5/1618 UNC
J/ B-16.UNC
7/16-14LINC
12-131NC
9/16-12 UN
5/8-11 UNC
3/410 UNC
T/8-9UNC
J-BUNC
every 25.4mm
1: thread effect
nominal diameter d
13 700
Note: 1. a, #, K, and are sample sizes. JR/T8824.6—1998
Table (end)
Pitch P
Reference 1
4°362
4°281
4°51°
3°27r
Through H run
1/2--3/4
Good efficiency generation
No.D-80 LNF
No.2-64 UNF
No.356 UNF
No.448 UNF
N0.544IINF
No.8-36 UNE
No.10-32 UNP
No.12-28 UNF
1/428UNF
5/16.-24 UNY
3/-24LINF
7/16-20 UNF
1/2-20UNFwww.bzxz.net
9/L6-1B UNF
SR-LXENF
/4-16UNP
7/8- [4 UNF
112 UNF
Every 25.4mm
Upper tooth
Nominal point diameter d
Foreign: 1, a, age, K, and 8 are recommended dimensions. 3B/T8824.6-1998
3°25*
3.2 The thread rolling plate's thread profile size and deviation are given in Figure 2 and Table 4. A type thread plate is preferred. P
Upper tooth effect
.0.102
.0.527
JR/T8824.6-1998
.0.632
.0.206
*0.020-0.031
Note: The maximum value of the radius R of the tooth top circle is 144P, which depends on the actual size. 3.3 Marking example
Every 25.1mm
Pitch code
Tooth type half
±20°
± 15'
± 55'
± 30°
Coarse teeth build a frequency comparison, soft code is 5/16-18UNC, 18 teeth per 25.4mm, 50mm seat, fixed thread rolling plate length 200mm, 2 short precision, burning pattern and type A: system-screw thread rolling plate A2/16-18UNC50/200-2JB/8824.61998 fine teeth system-frequency effect, burst pattern code is 1/2-20UNF, every 25.4 mm, 20 teeth, 80mm width, fixed thread rolling plate length 230mm, general accuracy, burst thread bullet A: system - thread rolling plate A1/2-20UNF80/230-1B8824.6-19985
Technical requirements
41 size
JB/TB824.6--1598
4.1.1 size, the deviation is h14. The difference in the precision of the fixed thread rolling plate and the movable thread rolling plate in the auxiliary thread rolling plate should not exceed 0.1mm. 4.1.2 The intersection of the plane perpendicular to the support of the thread rolling plate and the plane of the thread rolling plate, the parallelism of the support is given in Table 5 in the width direction and in the length direction in the ratio 6. The nominal diameter of the thread rolling plate is >2.854~5.485
>5.486~11.112
>11.11222.225
The length of the thread rolling plate is >8 0~[2D
>120-180
2180~250
>250-313
>315-400
Screw plate width
>30~50
>50~80
Parallelism tolerance
1 When checking the alignment of the screw thread teeth to the supporting surface, measure twice between the two sides, and the first complete tooth is allowed to be ignored. 2. Check the parallelism of the top of the active joint plate and the bearing pair. The cost of the fixed feed plate is not included. 6. JE8824.6-1998. d. 1.3 The verticality tolerance of the wire feeding plate support surface to the installation surface: 0.02 mm for H>30 mm: 0.03 mm for H>30 mm. 4.1.4 The deviation of the wire plate screw angle is ±2' for grades 1 and 2, and the difference of the screw angle of the auxiliary support wire plate is 3" for grades 1 and 2. 4. 2 Materials and hardness 4.2. The wire plate is made of Cr12MoY or 95iCr alloy tools. The average hook degree of Cr12MoV carbide is not more than 3 velvet. 4.2.2 The hardness of the thread rolling work part should be 59-62HRC, and there should be no decarburization on the work surface.3 Appearance and surface roughness
4.3.1 The surface of the thread rolling plate shall not have cracks, teeth, rust, grinding burns and other defects that affect the performance. 4.3.2 The upper limit of the surface roughness of the thread rolling plate shall be in accordance with the following provisions: Cockroach tooth surface
Bearing surface, installation surface
5 Marking and packaging
5.1 The thread rolling plate shall be marked
R.0.8μm.
a) Manufacturer or seller trademark
b] Added [\ thread code:
c) Thread tooth type of the thread rolling plate:
d) Accuracy grade;
) Width of the thread rolling plate:
Manufacturing material.
5.2 The packaging box should be marked with
a) the name, address and trademark of the manufacturer or seller; b) the mark of the sample wire plate
c) the manufacturing material:
d) the year and month of manufacture.
s.3 Packaging
The thread rolling plate shall be treated with anti-corrosion before packaging, and the packaging must be firm and prevent damage during transportation.
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