This standard specifies the form, calculation parameters and calculation formula of dimension chain. This standard is applicable to the length dimension and angle dimension and their tolerance calculation in mechanical products with dimension chain relationship. GB/T 5847-2004 Dimension Chain Calculation Method GB/T5847-2004 Standard Download Decompression Password: www.bzxz.net

1CS 17. 04C. 10
National Standard of the People's Republic of China
GB/T5847-2004
Dimension chain
Calculation method
Dimensional chain-Methods of calculation2004-11-11 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of China
Implementation on July 1, 2005
/T 58472004
Specification Applicable text
3 Terms and definitions
Dimension chain forms
5 Count
5 Symbols
? Calculation formula
Appendix A (informative appendix)
The method for determining the tolerance of the closed loop of the assembly dimension chain is given in the Appendix. The calculation formula of the assembly dimension chain is given in the Appendix (informative appendix). The values ​​of all the values ​​are given in the Appendix. This standard replaces the B/G 534?
198 medium chain
and the method.
Compared with GB/T17—19H, the following requirements are required: 2) The standard is re-edited according to GB/T1.12000: the relevant technical terms that are different from the current standard are modified: c) Appendix \ "Calculation example of dimension chain 1" is cancelled. Appendix A, Appendix 3 and Appendix 4 of this standard are all informational appendices. The standard is prepared by the National Technical Committee of the whole product size chain, and the units of this standard are the Mechanical Science Research Institute, Northeast University, and Taiyuan University of Technology. The main authors of this standard are Li Chunfu and Wang Xiaohui. The version of the standard replaced by this standard is: GS/T $8471945.
GB/I ​​58472004
Dimension chain
Calculation method
This standard stipulates the formal calculation parameters and calculation formulas of the dimension chain GB/I 5847--2004
This standard is applicable to the calculation of the length and width of the central dimension chain relationship and their tolerances in the machine products. 2 Normative references
The following documents have become the terms of reference through the reference of this standard. They are all referenced documents of the same period. All subsequent versions (excluding the contents of the reference) or revised versions are not applicable to this standard. The parties who reach an agreement based on this standard can only use the new version of this referenced document. Any reference document without a date, especially the new version, applies to this standard. G1/18--197 Plate and matching city Part 1, Ting 102199) 3 Technical and definitions
The terms and definitions established in B/18. and the following terms and definitions are applicable to the following standards. 3. 1
Dimension chaindimensiunalchain
In the process of machine assembly or parts processing, the dimensions connected are formed into a closed dimension group, see Figure 1》> and Figure 2, a)
Assembly diagram and Figure
Closed looprinsinglink
Test loop formed in the assembly process2. 3. 4
Emponentlink
The change of this ring causes the ring to change in the same direction as the change of the ring. The same direction change means that when the ring increases, the closed loop also increases, and when the ring decreases, the closed loop also decreases (Figure: middle) 3. 4. 2
Loop decresiag link
The composition of the dimension chain can cause the closed loop to change in the opposite direction. The reverse change means that when the ring increases, the state ring decreases, and the ring increases (and A:, in the figure and:
Compensating link
The first component ring selected in the dimension chain can be adjusted in size or position to make the closed loop reach the current requirement (Figure 3!). Figure 3
Transfer effect scalingfartnr.transformalknTalin represents the effect of each component ring on the size of the closed loop. Note 1: The relationship between the mass ring and the non-ring in the dimension chain can be expressed in the following form: -[(LI,,.-,1,); Type-A,=A -(A, +,++=
Net 2. The reduction coefficient of the potential ring is .,5-?
When the property is the value of the exciting ring position
4 Dimension chain form
4.1 Length dimension chain and angle dimension chain
Length dimension chain
Angle dimension chain
All links are long dimensions as shown in Figure 1;
-All links are small dimensions (
4.2 Assembly dimension chain elements Dimension chain and process dimension chain-All material links are new dimensions of components (see Figure) Assembly dimension chain... The whole book is composed of the same-· ... 2. The design refers to the parts marked with the two art scales and the small size of the workmanship. Figure 4 || tt || 4.3 Basic dimension chain and derived dimension chain || tt || Basic dimension chain (the dimension chain in the figure; CB/T 5847—2004
Two dimensions are connected in a chain and the chain is not a chain. 3t
4.4 Scalar dimension chain and pre-dimensional dimension chain
All components are chain formed by scalar dimension (see Figure 1-Figure 6). Only one dimension chain
All components are chain formed by the dimension (see Figure 8). C
4.5 Vertical dimension chain, surface dimension chain and space dimension chain
All components are chain formed by the dimension (see Figure 1~Figure 5) GB/T584/—2004
The plane of the scale is located in a parallel plane, but some groups are not parallel to the scale (Figure 9):
The ... 4 Relative asymmetry coefficient e
indicates the coefficient of symmetry of the distribution: symmetrical distribution within the public examination zone, let T represent public relations, then
5.5 average tolerance T
group reduction ring tolerance when all types of rings take the same tolerance position 5.6 Extreme tolerance I,
The tolerance of a closed ring or a component ring calculated according to the arithmetic properties of the components. 5.7 Statistical tolerance I
The tolerance of a closed ring or a component ring calculated according to the statistical properties of each component. 5.7.1 Square tolerance 1u
The tolerance of a closed ring or a component ring calculated according to the statistical properties of all components. 5.1.2 Equivalent tolerance T
The tolerance of a closed ring or a component ring calculated according to the statistical properties of each component. 5 Symbols
Product.1 Dimension chain
Dimensional drawing 1 Figure,
6.1.! Length ring
Currency capital letter type Heng Cheng Er, heart, etc., 5. 1. 2 Angle dynamic
Use small and Greek products. Etc.,
6.3 Closed loop
Use "\" as the subscript.
6.1.4 Constituent ring
Use subscript; Arabic characters indicate the font size of the constituent ring. 2 Characteristics of the ring
Special symbols for different rings 1
Special symbols for rings CB/T5847—2004
Juice: Distinguish between common and common elements in the variable ring: Medium and short effects are located in the positive, and the meaning of the blood is the main book: When the standard is explained, it is indicated
6. 3 Calculate the variables
Related wind, full difference, public welfare share calculation coefficient and other parameters?: The relationship between the vertical effect is shown in Figure 10. 2
Long ruler
The maximum investment limit! Ten
Minimum limit size
GR/T58472004
7Calculation formula
Table 2 (velvet)
Lower injury difference
Sea edge pad
Medium wide pad
Internal inquiry difference
Automobile medical effect
Injury system effect
Drug pair distribution,The calculation of the size of the shadow model
relative uncertainty coefficient
average tolerance
fast tolerance
ten tolerance
equivalent tolerance
size smallness, mainly calculate the basic size of the closed loop and the loop. The formula table of this formula is a sample.
Calculation formula
The mark "" below indicates that the meter is closed, "Find the environmental technology, the following e-.m
Small potassium content
Slope value tolerance
Washing public
Environmental control limit meter
Throw value tolerance
Fan meter tolerance
Ring wind operation light
Non-destruction insurance
Calculation division
L... -L.+ ES
.... ..FT.
Lu. -L,+ ES
Table 3 (missing)
CB/T 5347—2004Www.bzxZ.net
Under the circumstances of selecting the group defect tolerance, the ammeter also uses the public IoL-H quantity
\=,,1 -, the difference between the public relations of the tax and the enterprise is determined by the unfair situation. This year's seal is the smallest, the old + the difference -14-get the straight difference -2
calculation tolerance certificate value
where T
for white ruler learning. ~1. For T..
old construction group civil
difference situation matching this first composition of the public "the smallest when [, but the uneven average tolerance"
standard test family female ring public author
line ruler small load
under the calculation of the actual average public security its public equal quantity people
, get the group ring to seek the average
system H tolerance workers with the value
H in T.. -..?
.Its steps
C6/T58472004
Record 4
(Informative Appendix)
Methods to achieve assembly size chain ring tolerance requirements According to product design requirements, the situation is special, the tolerance size and production point state, so as to adopt the same recognition and seal case will require the method of labor, there are interchange method, grouping method, repair method and state trap method: A, 1, interchange method
According to It can be divided into complete interchangeability method and number of interchangeability method according to different steps. A.1.1 Complete interchangeability method
In the production of small products, when assembling, the components need to be able to select or change their size and position. After assembly, the tolerance requirement is achieved. The method adopts the method of calculating the tolerance fraction. A.1.2 Large interchangeability method
In most products, when assembling, the components need to be able to change their size or position without selection. After assembly, the tolerance requirement cannot be achieved. Tolerance requirements, this method uses the fast leaf public examination public out of the large number of interchange partners, Zong Jinxin Benping calcium: pass band, the lower ring chasing the approximate distribution, take the confidence level half 199.7%, then the special market coefficient point 1, under certain production conditions. Requires appropriate large weaving ring tolerance. Call for lower output value, health and. Risk dispersion value as shown in Table A.1.
It is advisable to seek A
Non-partition coefficient t
When using the number 5 exchange method, there is an appropriate, demolition and application , except for individual production standards or extreme deviations, A.2 grouping method
divides each component ring into a smaller group than the actual size, and the assembly must be delayed. The same group has 4 empty replacement parts: this method uses the public examination formula to calculate the value,
A3 repair method
when matching, the soft head can be actually removed to compensate for the damage, so that the sealing group ring can reach its tolerance limit deviation requirements. This method will use the extreme public relations formula to calculate.
.4 Adjust the actual size or position of the piece during assembly. When the adjustment is made, the compensation method is only for the actual size or position. When the urine ring reaches the limit difference, the material surface is light, and the damage is sustained. The gasket or the hole shaft connection can be made into a complementary ring. The method is usually calculated using the extreme tolerance formula Appendix
(Informative Appendix)
Assembly dimension chain calculation sequence
Assembly dimension evaluation calculation sequence is as shown in Figure 11.1. When the old or damaged technical requirements are met, the special cover ring public welfare extreme limit ticket
Identify the boundary retreat according to the ring selection phenomenon
White ruler management point
Break group ring public and limit base
Hit! Chapter: Office design and calculation year and public system change calculation product technology standard strict station installation learning drawing washing bucket secretion design group decision to take the public technology for the society special activity limit method adjustment method change cost of public quotation GH/T5847--20041. The old or broken or technical requirements of the support, the special cover environmental public welfare extreme limit coupons, the identification boundary return according to the environmental selection of the most white ruler management point, the group environmental public and limit base! The first: --- office design year and public system change nuclear calculation product leather technical standards strict station installation learning parts drawing washing bucket secretion design of the whole group of the decision to transport to the public to take the main technology for the society to choose the limit method adjustment method to improve the cost of the public report light GH/T5847--20041. The old or broken or technical requirements of the support, the special cover environmental public welfare extreme limit coupons, the identification boundary return according to the environmental selection of the most white ruler management point, the group environmental public and limit base! The first: --- office design year and public system change nuclear calculation product leather technical standards strict station installation learning parts drawing washing bucket secretion design of the whole group of the decision to transport to the public to take the main technology for the society to choose the limit method adjustment method to improve the cost of the public report light GH/T5847--2004
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