Some standard content:
Light Industry Standard of the People's Republic of China
QB/T 2251~-2257--96
Sewing Machine
1996-11-15 Issued
China Light Industry Federation
1997-07-01 Implementation
Light Industry Standard of the People's Republic of China
Special Thread for Sewing Machine
Q/r2254-96
This standard is a revision of ZBY·—. The following are the changes in the main technical contents of this version: , 2 cases in the following teaching period and internal standard, H = 0.2750526P
1-o.: 82531762
=0.C54126587P,
original standard elegant table 1,
effective value of the gauge is the number of digits:
original table about the tolerance of the number of digits collected as the difference.
this standard is the attachment of the full standard,
this standard is the international group mountain China general industry exhibition certificate department industry: special standard management enterprise Xie engraving machine standardization center door: wood standard arrangement start unit: Shanghai sewing machine account reform! , Shanghai Industrial Sewing Machine Co., Ltd., upstream market sewing machine research institute:
this standard is the drafter, Zhang Yuetun Xu Shaoji Wu Niu must be moved. Special thread for sewing machine: first issued in 1975, first revised in 1986, second revised in 1986.
From the date of implementation of this standard, the professional standard 7YY0:-85 special thread for warp sewing machine issued by the former Ministry of Light Industry shall be used.
TIKNrKA
Light Industry Industry Standard of the People's Republic of China
Sewing machine thread
QB/T 2254--96
This standard specifies the basic tooth size, diameter system and pitch of "screws and screws (hereinafter referred to as "screws"), as well as the basic specifications, tolerances and screw thread marks of screws for graded screws.
2 Referenced standards
The following standards contain provisions that are used in this standard and constitute the text of this standard. At the time of this standard, the specifications shown are valid. All standards will be revised and the parties using this standard should explore the possibility of using the latest version of the standard.
GB321-80 Generation and priority number system
3 Basic tooth types| |tt||, 1 screw thread and common parameters are shown in the figure. me
internal thread
external thread
internal thread light, mrml
internal diameter, mr
internal thread small size, 2m:
minister,,
tooth diameter,
light industry association approved in 1896-11-16
climbing sensitivity and effect
one, external media larger diameter, blood
external effective diameter,
external cochlear small,
original shape height, through
basic tooth type
18807-01 actual purchase| |tt||8.2 Calculation of the number of teeth in the following specifications:
.2.1 Calculation formula of the distance between teeth:
OB/T2254—96
日,2,2 Calculation formula of the three-dimensional quotient tle
Calculation formula of the tooth type height
H=0,64951
3,2.4 Calculation formula of the outer thread diameter between the bottom of the teeth =
The outer end of the thread can be made into a shape close to the toilet, and there should be no angle. 4 Diameter and frequency series
Specification series and product
4,2 Beam diameter The first series should be selected first, the second series, and the third series can be used as much as possible. The basic dimension calculation formula of the first series should be used. The total effective estimate should be rounded to the first decimal place. The value is shown in Table 2. 5.1 Calculation formula for the middle grid of two spirals 5.2 Calculation formula for the inner diameter or the outer diameter of the outer thread d, a-2x 5.4 Calculation formula for the outer thread minor diameter d=d-2× 6 The tolerance band of the inner thread is set as shown in Figure 2. KAca
O/T 2254—96
Internal thread diameter, etc.
?Internal thread tolerance band position
8.2 External thread tolerance position, see Figure 3. Year point
External thread diameter tolerance
Figure 3 External thread tolerance band position
Internal thread diameter tolerance
External thread tolerance
8, This standard stipulates that there are three levels of frequency grain, and the following considerations can be reported when selecting: 1 Linear degree, used for precision matching thread diameter, representative:; 2nd level resolution: used for medium matching thread diameter, representative: 2:3 Sharp accuracy: used for general matching, representative: 3. 30
Snail grain mark
B/T2254·--6
7,! The device's performance is marked by the code, and the device is relatively large, and the degree of the device is combined. When the thread direction and thread efficiency are 2 levels, the direction and degree are allowed to be omitted. The total diameter (industrial diameter) × the number of inches is 2 to get the thread code "5M". Example: Inch number + end diameter + thread efficiency code ... 2
One external exhaustion so terazole
Internal spiral effective sugar
8 frequency so basic size and partial ratio, table 2,rkNerKea
Nominal point diameter
QR/T2264—#6
Hai Hai Shi
0,2-75
n,3349
Point displacement series and end matching
Nominal point diameter
3,3871
1,E875
1,2700
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小轻上研部
(源）
a-'Fa-p
QB/T 2254-98
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附旁A(Suits rights)
Connect to the JTS0211-1 Registration Department and contact us. The G3321-1-R4G G3321-1 R4G is the most commonly used system in the world. 2000-0000000000000000000000000000200020022002000200000000000200000020005020200020002000202221200020002020202020200000000000011110000000550000000000055)
Td,-K(12L\ .oP-0.1+40P+I)..
,2
Te（0.264GP≤0.35)
d，（150.G35)
TD,K(12L.eP--.+4c\+.H.) ..
号-TD+(U.264E≤D.3BT).
TP,- 2TD,(n.387-P=0.G35)
- TD, (P-5.b35)
式,Td。——外螺较中径公差,µm:Tl螺纹大格公差,!m:
I'm not sure what to do,
I'm not sure what to do.的;
差惨正值(见表A1), K
精理等级系数(见表A?)。
- (12)
.... (13)
·(14)
1+4 e8/ 'tz
tpr'g ta/2ica
[c61-1 y2-8g'l 01'p s' 0589'co2+' oa~09e'9 b/- o
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1595\3:2e
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小轻上研部
(源）
a-'Fa-p
QB/T 2254-98
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Fost x1 -ar -
au Bg11'2t20'g 02
052+ 021+ 0*1+
ovr + tet ----
nt+2+ 0
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s2#\t it' rl
TITKNYKea
附旁A(Suits rights)
Connect to the JTS0211-1 Registration Department and contact us. The G3321-1-R4G G3321-1 R4G is the most commonly used system in the world. 2000-0000000000000000000000000000200020022002000200000000000200000020005020200020002000202221200020002020202020200000000000011110000000550000000000055)
Td,-K(12L\ .oP-0.1+40P+I)..
,2
Te（0.264GP≤0.35)
d，（150.G35)
TD,K(12L.eP--.+4c\+.H.) ..
号-TD+(U.264E≤D.3BT).
TP,- 2TD,(n.387-P=0.G35)
- TD, (P-5.b35)
式,Td。——外螺较中径公差,µm:Tl螺纹大格公差,!m:
I'm not sure what to do,
I'm not sure what to do.的;
差惨正值(见表A1), K
精理等级系数(见表A?)。
- (12)
.... (13)
·(14)
1+4 e8/ 'tz
tpr'g ta/2ica
[c61-1 y2-8g'l 01'p s' 0589'co2+' oa~09e'9 b/- o
lt-06' s26'f. 299'g 00'9280'l962 --
211-- 022's 21's 152's 052'91206'G2
c-1765g 929\ 880'g 05e'9925'00FTT-|T|e| 03+03+/0i0-
28'e4t rpt'g e96's1205'
ese'g *9/sr1
+ Yel ri 9sc't 90a's 93s's 9g1' za!0\ 2/21
1595\3:2e
Too +ostI sar.
小轻上研部
(源）
a-'Fa-p
QB/T 2254-98
n+ ut t+t|| +008-
cht-0n'2282'xzp'ha91 50't' b7 ot'0s21- gr -t hne -312-
1 121+81+9*+| 0+002: - s8t -+ -[ 042 - 2-?|0%|C| +
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e2's'0 242
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s++58 +t26- 06f+1+[9n ++ + 0c61 -ort -jqr- s18-02a -z+ vas+l ort+r+|tt|| rjpatjoo
Fost x1 -ar -
au Bg11'2t20'g 02
052+ 021+ 0*1+
ovr + tet ----
nt+2+ 0
$2-093+: 05+| o1-'s las0'6 0'o c'11gs'so/
a1 --2-
hl ---Btl-eeo'otiper'6
00n +15e-1 002+02t+
027-s2LR
8z--0*l-bes-t't' iea5'2np'g
lses'6s283't 5t
S2 + 067 +06t+0nL+
r -joa -
[ osl -
zensig'
s2#\t it' rl
TITKNYKea
附旁A(Suits rights)
Connect to the JTS0211-1 Registration Department and contact us. The G3321-1-R4G G3321-1 R4G is the most commonly used system in the world. 2000-0000000000000000000000000000200020022002000200000000000200000020005020200020002000202221200020002020202020200000000000011110000000550000000000055)
Td,-K(12L\ .oP-0.1+40P+I)..
,2
Te（0.264GP≤0.35)www.bzxz.net
d，（150.G35)
TD,K(12L.eP--.+4c\+.H.) ..
号-TD+(U.264E≤D.3BT).
TP,- 2TD,(n.387-P=0.G35)
- TD, (P-5.b35)
式,Td。——外螺较中径公差,µm:Tl螺纹大格公差,!m:
I'm not sure what to do,
I'm not sure what to do.的;
差惨正值(见表A1), K
精理等级系数(见表A?)。
- (12)
.... (13)
·(14)
s8t -+ -[ 042 - 2-?[
00C + E0% +
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tt rjpatjoo
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au Bg11'2t20'g 02
052+ 021+ 0*1+
ovr + tet ----
nt+2+ 0
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0+2 +0
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00n +15e-1 002+02t+
027-s2LR
8z--0*l-bes't iea5'2np'g
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S2 + 067 +06t+0nL+
r -joa -
[ osl -
zensig'
s2#\t it' rl
Also similar to Ten Music Teaching
TITKNYKea
Appendix A (Appendix to the Standard)
Basic formula and related data
The values given in this standard are calculated based on the calculation formula proposed in JTS0211-1 Metric Fine Pitch Screw Tolerances and Limit Deviations Explanation. After signing G3321-1, R4G series will have priority in reducing and rounding their values accordingly. , 1 The calculation formula for external exhaustion is
Td,-K(12L\.oP-0.1+40P+I)..
, 2 The calculation formula for internal implosion is
Te(0.264GP≤0.35)
d, (150.G35)
TD,K(12L.eP--.+4c\+.H.) ..
号-TD+(U.264E≤D.3BT).
TP,- 2TD,(n.387-P=0.G35)
- TD, (P-5.b35)
formula, Td. ——External thread mean diameter tolerance, μm: Tl——External thread major tolerance, μm:
——Internal mean diameter tolerance,
——Internal end thread minor diameter tolerance, μm;
——Split distance, m
Size (take S)
Hs——Medium diameter tolerance positive value (see Table A1), K
Precision grade coefficient (see Table A?).
- (12)
.... (13)
·(14)
Combined degree grade
Corrected by the public certificate,
Table A? Degree grade series
-TKNerKeas8t -+ -[ 042 - 2-?[
00C + E0% +
''s't te
e2's'0 242
90- -t - K2 -
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S68 - 018+ 21+
60t+L+0
+28+/ u8z+| 061+39r+ h1t- ua +l o0jgcut- ett- 0x - s08-co0s 002
s++58 +t26- 06f+1+[9n ++ + 0c61 -ort -jqr- s18-02a -z+ vas+l ort+janr+
tt rjpatjoo
Fost x1 -ar -
au Bg11'2t20'g 02
052+ 021+ 0*1+
ovr + tet ----
nt+2+ 0
$2-093+: 05+01-
0+2 +0
-! o1-'s las0'6 0'o c'11gs'so/
a1 --2-
hl ---Btl-eeo'otiper'6
00n +15e-1 002+02t+
027-s2LR
8z--0*l-bes't iea5'2np'g
lses'6s283't 5t
S2 + 067 +06t+0nL+
r -joa -
[ osl -
zensig'
s2#\t it' rl
Also similar to Ten Music Teaching
TITKNYKea
Appendix A (Appendix to the Standard)
Basic formula and related data
The values given in this standard are calculated based on the calculation formula proposed in JTS0211-1 Metric Fine Pitch Screw Tolerances and Limit Deviations Explanation. After signing G3321-1, R4G series will have priority in reducing and rounding their values accordingly. , 1 The calculation formula for external exhaustion is
Td,-K(12L\.oP-0.1+40P+I)..
, 2 The calculation formula for internal implosion is
Te(0.264GP≤0.35)
d, (150.G35)
TD,K(12L.eP--.+4c\+.H.) ..
号-TD+(U.264E≤D.3BT).
TP,- 2TD,(n.387-P=0.G35)
- TD, (P-5.b35)
formula, Td. ——External thread mean diameter tolerance, μm: Tl——External thread major tolerance, μm:
——Internal mean diameter tolerance,
——Internal end thread minor diameter tolerance, μm;
——Split distance, m
Size (take S)
Hs——Medium diameter tolerance positive value (see Table A1), K
Precision grade coefficient (see Table A?).
- (12)
.... (13)
·(14)
Combined degree grade
Corrected by the public certificate,
Table A? Degree grade series
-TKNerKea
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