GB/T 10086-2018 English PDF (GBT10086-2018)

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GB/T 10086-2018: Symbols for cylindrical worm and worm wheel
GB/T 10086-2018
(Cylindrical worm, worm gear code)
ICS 21.200
J17
National Standards of People's Republic of China
Replace GB/T 10086-1988
Cylindrical worm and worm gear code
Published on.2018-05-14
2018-12-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 10086-1988 "Cylinder Worm, Worm Wheel Terminology and Code".
Compared with GB/T 10086-1988, the main changes of this standard are as follows.
--- Modify the name of the standard and change it to "Cylinder Worm, Worm Gear Code";
--- Added standard "preface";
--- Removed the content of the "requirements" in the scope of the original standard (see Chapter 1, Chapter 1 of the 1988 edition);
--- cited the latest version of the relevant standards (see Chapter 2, Chapter 2 of the 1988 edition);
--- Added "combination rules for basic code" (see Chapter 3);
--- List the basic code in tabular form (see Chapter 3, Chapter 3 of the 1988 edition);
--- Removed the terminology (see Chapters 4, 5, and 6 of the 1988 edition).
Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents.
This standard is proposed and managed by the National Gear Standardization Technical Committee (SAC/TC52).
This standard was drafted. Chongqing Machine Tool (Group) Co., Ltd., Zhengzhou Machinery Research Institute Co., Ltd., Beijing University of Technology.
The main drafters of this standard. Li Xianguang, Yu Kebin, Li Yi, Zhang Yuanguo, Shi Zhaoyao, Long Lin, Zhang Liang, Li Mingyu, Xie Xiaoqing, Wang Zhigang,
army.
The previous versions of the standards replaced by this standard are.
---GB/T 10086-1988.
Cylindrical worm and worm gear code
1 Scope
This standard specifies the cylindrical worm and worm gear code.
This standard applies to cylindrical worm gears with axle angle ∑=90°, as well as worm and worm gear.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 2821-2003 Gear geometric element code
3 basic code of worm and worm gear
3.1 Combination rules for basic code
The basic code of the worm and worm gear follows the requirements of 2.1 of GB/T 2821-2003. The main rules are as follows.
a) the code consists of a master code or a master code plus one or more subscripts or a superscript;
b) The primary code can be a separate uppercase or lowercase letter. The letters should be in italic Roman or Greek letters;
c) the subscript shall be a Roman alphabet or an Arabic numeral or a combination of both;
d) All subscripts shall be marked on the same line and lower than the main code;
e) the symbol of the line (the line is drawn above or below), the superscript except the index, the prescript, the prescript, the subscript, the second
Superscripts and dashes should be avoided.
3.2 Main code
The most common main codes for worms and worm gears are shown in Table 1.
Table 1 main code
Code meaning description code meaning
a center distance
b tooth width
c headspace
d diameter
e cogging
h tooth height
i gear ratio
j backlash
k Number of teeth or pitch in a given range
Lowercase Rome
Italic letter
m modulus
n speed
p spiral parameter
q diameter coefficient
r radius
s tooth thickness
z number of teeth
u tooth ratio
v line speed
Lowercase Rome
Italic letter
Table 1 (continued)
Code meaning description code meaning
α tooth angle, pressure angle
螺旋 helix angle, indexing cylinder helix angle
γ lead angle, indexing cylinder lead angle
ε coincidence
Lowercase Greece
Italic letter
θ tooth width angle
ρ radius of curvature, radius of curvature of the tooth profile
ω angular velocity
∑ axis angle
Lowercase Greece
Italic letter
Capital Greece
Italic letter
3.3 Composite Master Code
The common composite master code is shown in Table 2.
Table 2 Composite Master Code
Code meaning code meaning
c* headspace coefficient pb base pitch
D0 tool diameter pn normal pitch
D1 worm indexing circle diameter pt worm wheel indexing circular pitch (weekly section)
D1' worm pitch circle diameter px axial pitch
D2 worm gear index circle diameter pz worm lead
D2' worm wheel pitch diameter rg2 worm wheel throat radius
Da1 worm tooth tip circle diameter sn normal tooth thickness
Da2 worm wheel throat diameter sn normal chord tooth thickness
Db base circle diameter sx axial tooth thickness
De2 worm wheel top circle diameter x2 worm gear displacement coefficient
Df tooth root diameter z1 number of worm heads
En normal tooth groove width z2 worm gear number
h' working tooth height α0 tool shape angle
Ha apex height γb base cylindrical lead angle
Ha* tooth tip height coefficient ρa tooth tip radius
Hf root height ρf root radius
Hn normal chord height
Note. “*” indicates the size factor (the ratio of size to modulus, marked in the upper right corner of the main code).
"'" means working, meshed, and base circle (marked in the upper right corner of the main code).
"-" indicates the chord (marked above the main code).
3.4 corner mark
Common corner code names are shown in Table 3.
Table 3 corner code
Code meaning description code meaning
a tooth top, high tip
b base round, base cylindrical
e external
f tooth root, high root
g throat
s upper limit
i lower limit
m midpoint, middle, average
Lowercase Rome
Normal letter
n normal plane
T-plane, end face
X-axis, axial, axial plane
0 tool
1 worm
2 worm gear
L left, left, left-handed
R right, right, right-handed
Lowercase Rome
Normal letter
Orthodox
Number
Capital Rome