JB/T 9169.3-1998 JB/T 9169.3-1998 Process Management Guidelines Product Structure Processability Review JB/T9169.3-1998 Standard Download Decompression Password: www.bzxz.net

ICS25.010
Machinery Industry Standard of the People's Republic of China
JB/T9169.3-1998
Guide for technological management-Review of technological efficiency of design of products1998-11-16 Issued
National Bureau of Machinery Industry
1998-12-01 Implementation
JB/T9169.31998
This standard is a revision of JB/Z338.1~338.1488 "Guide for technological management". Only editorial revisions were made during the revision, and the main technical content remained unchanged.
This standard replaces JB/Z338.1~338.1488 from the date of implementation. All appendices to this standard are informative appendices. This standard is proposed and managed by the Mechanical Science Research Institute. The responsible drafting unit of this standard: Mechanical Science Research Institute The main drafters of this standard: Ma Xianzhi, Li Qin, Shi Junwei, Wu Cheng, Du Shanyi. 1
1 Scope
Standard of the Machinery Industry of the People's Republic of China
Product Structure Processability Review
Guide for Process Management
Guide for Technological Management-Review of Technological Efficiency of Design of Products This standard specifies the tasks, contents and procedures of product structure processability review. This standard applies to the structural processability analysis and review of various types of electromechanical products. 2 Referenced Standards
JB/T9169.3-1998
Replaces JB/Z338.3—88
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. JB/T9165.3—1998 Management Process Document Format 3 General Requirements
3.1 All newly designed products and improved products shall be subject to structural processability review during the design process. 3.2 Enterprises shall also conduct structural processability review for external product drawings before the first production. 4 Tasks of product structural processability review
The purpose of product structural processability review is to ensure that the newly designed products meet certain processability index requirements while meeting the use function, so that they can be manufactured in a relatively economical and reasonable way under the existing production conditions, and be easy to use and maintain. 5 Process classification, main factors to be considered in evaluating product structural processability and processability evaluation form Process classification, main factors to be considered in evaluating product structural processability and processability evaluation form are shown in Appendix A (suggestive Appendix). 6 Main index items of product structural processability
Main index items of product structural processability are shown in Appendix B (suggestive Appendix). 7 Contents of product structural processability review
In order to ensure that the designed products have good processability, processability review shall be conducted at all stages of product design. 7.1 Review at the preliminary design stage
7.1.1 Analyze the rationality of the structural scheme from the manufacturing point of view. 7.1.2 Analyze the inheritance of the structure.
7.1.3 Analyze the standardization and serialization degree of the structure. 7.1.4 Analyze whether the components of the product are easy to assemble, adjust and repair. 7.1.5 Analyze whether the selection of main materials is reasonable. 7.1.6 The possibility of main parts being processed in the enterprise or outsourced. Approved by the State Bureau of Machinery Industry on November 16, 1998, implemented on December 1, 1998
7.2 Review at the technical design stage
JB/T9169.3-1998
7.2.1 Analyze the feasibility of parallel assembly and inspection of the components of the product. 7.2.2 Analyze the feasibility of general assembly.
7.2.3 Analyze the feasibility of avoiding or reducing cutting during assembly. 7.2.4 Analyze the feasibility of processing high-precision complex parts in the enterprise. 7.2.5 Analyze the checkability of the main parameters and the rationality of the main assembly accuracy. 7.2.6 Feasibility of outsourcing processing of special parts. 7.3 Review at the work drawing design stage
7.3.1 Whether each component has an assembly reference and whether it is easy to assemble and disassemble, 7.3.2 The feasibility of disassembling large components into small components for parallel assembly. 7.3.3 Review the processability of parts casting, forging, stamping, welding, heat treatment, cutting and assembly [see Appendix C (Suggested Appendix)].
8 Methods and procedures for product structure processability review 8.1 The processability review (or analysis) at the preliminary design and technical design stages is generally conducted in a joint review manner. For important products with complex structures, the chief process engineer should frequently participate in various meetings and related activities related to the research of the product design work from the beginning of formulating the design plan, so as to put forward opinions and suggestions on its structural processability at any time. 8.2 The processability review of the product work drawing should be conducted separately by the product chief process engineer and various professional process engineers (members). 8.2.1 The product drawings for processability review should be original drawings (pencil drawings) and must be signed by the design and review personnel. 8.2.2 The reviewer should fill in the "Product Structure Processability Review Record" (see JB/T9165.3) for the processability problems found during the review. 8.2.3 After the review of the full set of product drawings, if there is no major modification opinion, the reviewer should sign in the "Process" column. If there is a major modification opinion, do not sign for the time being, and submit the product design drawings and processability review records to the design department. 8.2.4 The designer modifies the design according to the opinions and suggestions in the processability review record. After the modification, the drawings that have not been signed for the process are returned to the process department for review and signature.
8.2.5 If the designer and the process engineer disagree, the two parties shall negotiate to resolve it. If there are still major differences of opinion during the negotiation, the factory technical person in charge shall coordinate or make a ruling.
A1 Processability classification
A1.1 Production processability
JB/T9169.3-1998
Appendix A
(Suggestive appendix)
Processability classification, main factors to be considered in assessing product structure processability and form of processability evaluation The production processability of product structure refers to the difficulty and economy of its manufacturing. A1.2 Use processability
The use processability of product structure refers to the difficulty and economy of its maintenance and repair during use. The main factors to be considered in assessing product structure processability A2
a) Type and complexity of product:
b) Output or production type of product;
c) Existing production conditions.
Form of processability evaluation
A3.1 Qualitative evaluation
Generally evaluate the processability of product structure based on experience. A3.2 Quantitative evaluation
Evaluate according to the values ​​of the main processability indicators. 3
B1 Product manufacturing labor.
B2 Unit product material consumption.
B3 Material utilization coefficient (Km)
Product structure assembly coefficient (K)
Product process cost.
Product maintenance labor.
Processing accuracy coefficient (Kac)
Surface roughness coefficient (K)
JB/T9169.3-1998
Appendix B
(Suggested Appendix)
Main indicators of product structure processability items
Net weight of product
Material consumption process quota of the product
The sum of the number of parts in each independent component of the product K=
Total number of parts of the product
Product (or =Number of dimensions with tolerance requirements in the drawing of parts (or components) Total number of dimensions of products (or components)
Number of surfaces with roughness requirements in the drawing of products (or components) K.=
Total number of surfaces of products (or components)
Structural inheritance coefficient (K)
Structural standardization coefficient (K)
Structural element unification coefficient (K)
K,=Number of borrowed parts in the product + number of common parts
Total number of product parts
K. =Number of standard parts in the product
Total number of product parts
Number of the same structural elements used by each part in the product K=
Number of size specifications of the structural element
JB/T9169.3-1998
Appendix C
(Suggested Appendix)
Basic requirements for casting, forging, stamping, welding, heat treatment, cutting and assembly processability of parts structure C1 Casting processability of parts structure
a) The wall thickness of the casting should be appropriate and uniform, without sudden changes; b) The casting radius should be reasonable and without sharp corners; c) The structure of the casting should be as simple as possible, and there should be a reasonable draft angle to reduce the parting surface and core for easy demolding d) The thickness and distribution of the reinforcing ribs should be reasonable to avoid deformation or cracks of the casting during cooling: e) The material selection of the casting should be reasonable.
Forging processability of parts structure
a) The structure should be simple and symmetrical: Www.bzxZ.net
b) The die forging should have a reasonable forging slope and fillet radius: c) The material should be forgeable.
C3 Stamping processability of part structure
a) The structure should be simple and symmetrical:
b) The shape and inner hole should avoid sharp corners as much as possible;c) The radius of the fillet should be conducive to forming:
d) The material selection should meet the process requirements.
Welding processability of part structure
a) The materials used for welded parts should be weldable;b) The layout of the weld should be conducive to reducing welding stress and deformation:c) The form, position and size of the welded joint should meet the requirements of welding quality;d) The technical requirements of welded parts should be reasonable.
Heat treatment processability of part structure
a) The technical requirements for heat treatment should be reasonable;b) Heat-treated parts should avoid sharp corners, sharp edges and blind holes as much as possible;c) The cross-section should be as uniform and symmetrical as possible;
d) The material of the part should be compatible with the required physical and mechanical properties. Cutting processability of part structure
a) The requirements for dimensional tolerance, form and position tolerance and surface roughness should be economical and reasonable; b) The geometric shapes of each machined surface should be as simple as possible; ) Surfaces with mutual position requirements should be able to be processed in one clamping as much as possible; 5
JB/T9169.3-1998
d) Parts should have reasonable process datums and be consistent with the design datum as much as possible; e) The structure of parts should be easy to clamp, process and inspect; f) The structural elements of parts should be as unified as possible, and they should be able to be processed using common equipment and standard tools as much as possible; 9) The structure of parts should be as convenient as possible for simultaneous processing of multiple pieces. C7 Assembly processability
a) Avoid using complex process equipment during assembly; b) In the structure of assembly units or their components with a mass greater than 20kg, there should be structural elements for lifting; c) Avoid intermediate disassembly and reassembly of related components during assembly; d) The connection method of each component should ensure that it can be quickly assembled and disassembled with the least tools; e) Various connection structure types should facilitate the mechanization and automation of assembly work6
People's Republic of China
Mechanical Industry Standard
Process Management Guidelines Product Structure Processability Review JB/T9169.3- 1998
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
100044)
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