GB/Z 19098-2003 Data content and organization of digital definition of mechanical products
Some standard content:
Appendix A, Appendix B and the main content of this guidance technical document are all informative. This guidance technical document is proposed and managed by the China Standard Research Center. The drafting unit of this guidance technical document is China Standard Research Center. The main contributors to this guidance technical document are: Wang Ping, Fan Yugu, Lin Xiaozu, An Guangli, Zhan Junhao. GB/Z19098—2003
R/19098—2003
The design of mechanical products is a transition from the traditional computer-aided design method to the traditional paper-based design method. The product definition is a digital product. The mechanical product adopts computer-aided design, especially the physical model of the product. The design of the product has been completely digitalized. The product drawing information is generated from the three-dimensional model of the sound. This raises the question of the organization of the digital information of the product, that is, the content of the product definition and the format change. With the unified product digitalization method, it is convenient for designers to convey product information correctly and completely to manufacturing departments, and it also enables the entire industry to exchange digital information of products. This means that the data organization of product digital definition should not be limited to other regions' CD systems, and the national design document system for product digital information will still be used in the product digital definition method. The technical documents formulated by our country are the technical rules and digital organization for defining the digital definition of products. The main ones include a table of required product performance and parts, including product design models, age diagrams, instruction manuals, and program information: the digital file can be in an international standard format (such as STEP documents), or it can be non-standard data defined by the system (AI). Parts table is an electronic digital table whose memory includes all the data of parts and components: Parts table enables the organization and exchange of digital definitions of parts and components from product design, process design to processing. This technical document is related to the national standard GB/T16565.1.1.2 Industrial Automation and Integration Product Data Exchange (SEP standard). The content of the technical document mainly includes the content of product definition plan and the content of STEP standard. The main purpose is to standardize the formalization of data and the implementation method of data exchange. 1 Scope
Data content and organization of digital definition of mechanical products
CB/219098—2C03
Small technical document specifies the data content and organization of digital definition of products and their organization, including Control digital therapy or purchase, a process data collection, cow table and other internal production,
This non-technical document is not used by the three equipment personnel to use the A system and its related software to the production data of the machine, so that the data exchange between the auxiliary system and the related systems can be achieved. The formalization of product data and the data exchange are realized (national standard (H: 116655) This (H: "142-3" is within the scope of this reference document. 2 Normative reference documents
The clauses in the external documents become the terms of the technical document through the development of the technical document: it is a document for the use of the extended period of time and it is owned by the factory This guide is not applicable to the revised version (excluding the contents of the current version) or the revised version. However, the technical documents of this guide are not applicable to the latest versions of these documents. Please note that the latest version of this guide is applicable to the following documents: GB/T14313 Mechanical drawing of hot tools GB/T116 Mechanical drawing of hot tools GH/15(4S.1 General principles of standard document system GBT151 Technical product design drawing of calculation auxiliary function consultation G[I Industrial automation system integration product data expression and connection CT/T178 (A document management system) GB/T18784/CAM data quality management system: ... parl
The unit formed by simple assembly or combination. It can also be called component, 3.3
Assembly
Parts are formed by connecting together various forms of assemblies: parts that can be assembled and composed of small assemblies, /7190982003
Installation
Parts are formed by the installation of accessories. The quality of the final product is relatively large, and it is at a higher level in the assembly process, and the completion time of the installation is also relatively clear. 3.5
Component/integratinn
Component, assembly, accessory or assembly is a group formed by a complete set of components. In the final product, it has independent functions and is sometimes called an integrated component or assembly. 3.6
Components
Parts, self-assembly, and the unit formed by the production process to produce an independent part, including components, assemblies, assemblies, installations, and finished units. 3.7
Next higher assembly Next higher assembly The assembly formed after the basic components have participated in a certain step of the assembly, that is, the parent node of the node in the assembly system where the components are located. In the assembly, it is represented as the assembly corresponding to the higher level assembly. The upper assembly is also marked as a higher level assembly.
Sub-assembly
Corresponds to the meaning of the upper-level assembly, and refers to the assembly unit of the structure or its assembly. This unit is a replacement part: 3.9
Component
Constitutes the component unit of the assembly and installation parts. The component can be a component, and the assembly parts form a sub-assembly. 3.10
Part number Part number
Each component is marked with a code. The code is based on the code of the sample file. The specifications of different industries may be different. The code channel of AI document is specified in G/T1792. The code of the standard drawing adopts GI159,1, for example: the parts include the main part and the sub-part number, the main part number is divided into two parts, and the sub-part number is divided into two parts. In the learning part "145A9302-5\, 148A9302\ is the main part number, 57 sub-parts, 3.11
primtpart
the sub-parts in the rare table of the drawing. The main sub-part is the sub-part in the second-level parts table, and the sub-part is in the second-level parts table. The sub-part is ... 13
Configuration
The components included in the product also constitute the parts of the product: configuration is divided into basic configuration and variant configuration. Different customers can choose different customer configurations for the products they order. The basic configuration is completed by the product manufacturing company before the customer can choose it at will. 3. 14
Basic configuration busiceconLfignliurk
The basic configuration of the molded product is generated by the unmodified design of the product. 2
Adaptational configurationratlon
Variant configuration
The configuration of components selected to meet the special requirements of customers for the product, also known as customer configuration. 3. 15
Drawing change orderrinauti
GB/7,19098—2003
A form issued by the company with the drawing, used to explain the change of the drawing when issuing the drawing: 3. 17
Temporary drawing change orderadvaace drawing change notiee is used as a template when issuing the drawing before the first sample is issued. 3.18
Program identification numberprogramidentiticatomberproduct engineering identification, etc.: It is the number obtained by decomposing the product structure, defined in 1. Decomposition structure (W5), 3.19
Parts table pari llsi
Electronic data form containing the required parts and non-geometric data. 3.20
Work breakdown structure mrkhreakdnwnstrociue enterprise project management process through the system 1 rental work shadow, product-centric room bed system station purchase, 3.21
digitl pre-assembly
Digital pre-assembly
Based on design, analysis or tooling, a computer file with variable arrangement of parts, assembly parts or installation parts is used to check whether the parts have any related interface conditions in the assembly connection and the status of the design case. This process is to simulate the pre-assembly of the designed product object on the computer. 4 Abbreviations
This technical guidance document is as follows: AlxNAdvaneeDrawirgChangcNsticcTemporary drawing change listHOM, HillfMalerial parts list. Also color bill of materials CSG: CansaruetiveSalidGeometry entity, Sichuan He structure representation quick DcNlrawinkWhanheAotice optional change list IGES.Erial Grapthies Exehagu 5. Product digital definition specification
5.1 Contents of product digital definition
Each part of the product digital definition includes two contents: 1. the frame number list and the part number list. They are composed of the part number and together constitute the basic technical data unit of the product definition. As the complete information of product design, the digital definition of the product model is issued and controlled by the quality management department, and then sent to the control department. The engineering data set is logically divided into the data file of the product digital definition, and the engineering design department takes the design results. In the engineering data collection, the production of parts, assembly parts and installation parts, the production process and other aspects are summarized in a CA model, and the engineering data is stored in a computer file or a matrix. Its storage format can be standard or non-standard. The engineering data is the core data of the product mathematical definition. Its numerical model is the basis for product manufacturing and quality control. Note: The data can be obtained by using S standard or IES standard data. It may be AI-defined. The data of the parts table is a data table containing non-geometric data of the parts. From product design, process design to processing process, the parts are digitally defined and the group and family are defined. The method of teaching the maintenance of the system can be effectively used to generate the sample and the missing list (EM) of the part table, and the modification of the protection method can be completed. The configuration of the parts is physical and the relationship between the structure and assembly of the parts. 5.2 Product digital definition rules
5.2. Coordinate prohibition
When passing the "strict product construction", the coordinate system must be determined first. The coordinate system is the basis for determining the negative and dimensional reduction of the product type. When evaluating the design, the different designs of the participants or the design of the old must be standardized. The system is used to standardize the design, so as to reduce the model and the position of the people in the country. Flexibility: Generally, it is advisable to specify a coordinate system: global coordinate system, auxiliary coordinate system, and local coordinate system: the relationship between the auxiliary coordinate system and the global coordinate system and the local coordinate system should be explained in the data. The local coordinate system should be built on the surface of the vertical village intersection. If the intersection is not necessary, the design should be carried out at the starting point of the scale to reduce the design disaster. 5.2.2 Model rationality
This guide only involves the geometric modeling of the model. Note: The question of model rationality is changed to complex. Each industry and each medium can have its own regulations. 5.2.2. 1. Short principle
Model complete
For parts with symmetry or symmetry, a complete three-dimensional model should be built instead of a three-dimensional model. Symmetrical parts are represented by individual parts, with different parts numbers: 3D model proportions:
CAD model is based on the original size of the product (see 111) Resulting parts:
1D data model and its related derived model base (for example For example, standard parts, such as components, drawings, etc.) Geometric clarity:
CAI models should contain all the direct copies of the components and the model should not contain any components that are not available in the CAD system to ensure the clarity of the model. A. Simplification within the model:
Under the premise of not affecting the shape and function of the case, the elements and specifications should be minimized as much as possible: Note 1: "The CA model should be carefully designed so that no gaps will occur during the design process and the comparison is carried out." In order to reduce the complexity of the model, a simplified representation can sometimes be used. Let: the sections are not worth it, the girl does not need to come out with the standard examples and good examples: for the internal dryness, we also have three beautiful features, such as code enough, 5.2.2.2 Geometric design quality
The following are the specific requirements of geometric design principles that must be followed quickly: GB/_78-: CAD modeling errors and content examples see the attached RA
: The design can be verified based on the industry and enterprise's development requirements for quality. 1. There should not be any tiny element smaller than the point (out of the medicine segment, surface piece, mountain surface piece of edge solid wood, etc.! : The data needs to be maintained by the continuity of the load and the curve: a mountain curve should avoid fluctuations!
The diameter should avoid the monthly quotient 9 shift terms and the average curve and between: avoid my white intersection
1. Avoid the appearance of small and evil nodes;
The system and the surface should not have small long mountain control
The force of the boundary intersection cannot be less than the tolerance;
A classic surface effect boundary cannot appear without inversion: a surface should not contain too many surface pieces, and the surface should not appear incomplete (bounded surface makes the surface go to the boundary curve between the outside, outside, inside and outside: - The decision is not to appear more mature or penetrate: the distance between the boundary leaf line and the mountain surface should not be greater than the tolerance value, once the boundary blood The monitoring direction of the line should be: the curve should not be uneven near the boundary; a section should only pass through one adjacent line; the connection should not appear in the form of a fork or a change in the connection; the flow should be directed to the outside or inside; the angles of one or two faces should not be too small; the distance between the edge and the point, and the distance between the point and the center should not be too large. GB/219098—20C3
Note: The geometric design has a dangerous effect on the center. For example, the data of the system should be good, and the data should be collected by the doctor. The data should be collected by the doctor, and the data should be collected by the doctor. ! The basic design of the disk can be used without the need to change the plan. 5.3 Geometric elements in product digital modeling 5.3.1 Use of geometric forms
We should carefully adhere to the main geometric forms used in the design, such as points, wireframes, mountain surfaces and solids. There are also other forms, such as shear surfaces, surfaces, etc., which should be the main and important forms in the real room. When they cannot meet all the needs, other forms can be used. Use the pre-installed digital card to describe the format. In the design model, the points used to define the location of the geometric elements should be consistent. 5.3.2.1 This specification stipulates that the location of points in the design should be represented by """ """ """, and the location of points should not be random, otherwise it will cause a sense of inconsistency.
For ten holes, if In addition to marking a point at the intersection of the hole and the facing plane, the point indicating the square of the hole axis should also be given. 5.3.2.2 Point stratification
In the mold, the points should be divided into different layers according to the different content of the points. Point stratification principle: According to the points (including the direction, the points should be divided into different layers according to the type and size of the points. The points indicating the pallet, nut, gasket, etc. should not be divided into two layers. The points indicating the size of the hole should be placed separately, and the points indicating the accuracy should be placed separately; the points indicating the T-technique should be placed separately on the first layer. The points indicating the intersection of the opening should be placed on the same layer. 5.3.3. Cable cabinet
The cable work is expanded to define new curved lines of intersection and tangent lines, including the section lines of the two-dimensional drawing and the line elements of the vertical entity. In order to simplify the model, the surface angle and some workpieces can also be defined by lines, without the need for surface or entity shape.
5.3.3.1 Basic rules
One can not divide the line into solid segments. You can draw 3
GB/Z1903B-2003
"One or two line frame elements contain the original, five bones, and the second separation of the sharp cutting. The maximum or minimum value. 5.3.3.2 The type of the load
A solid line represents the boundary line:
A dotted line shows the center of the stem line! The same double point front war table public line frame The rest is done. 5.3.3.3.3 Line element layering
Put the corresponding elements that define the edges of the components in a separate layer, including any standard opening cuts. Each mark has a number of openings divided according to size and shape. Each mark is a corresponding line element on the upper layer, including the inner and outer edges and some intermediate points:
Put the center lines of the components in a separate layer; the break lines (not shown here) should be placed in a separate layer) and the line elements of a solid component should be placed in a separate layer. 5.3.4 Surfaces
Surfaces are used to describe non-planar surfaces of components, and are also used as the structure of wireframes. The model with curved surfaces must be divided into two alternative methods to ensure the completeness of the figure: use two intersecting faces to select the edges of the component; or use 5.3.4.1 Basic principles of surface creation
First, the design plan should meet the requirements of surface accuracy and glossiness of the new device. For manufacturing, the control curve should be the lowest curve in the direction of the number of times more than 5 and should be used directly. The control curve should be the curve with the lowest accuracy. The control curve should be cut to meet the requirements of the dynamic point, and the curvature and curvature should reach the limit. In the micro-CA mouth fluorescent model, the control curve should be excluded; and the surface should be formed by the number of faces and the number of surfaces to meet the requirements of the design plan. The extension of the surface
Unless there are special requirements, the defined edges must be the same as the parts model. The flow line of the boundary point
should make the normal direction of the curve point from the inside to the outside of the part: the normal reversal often occurs on the edge surface. At this time, a small curve can be drawn to replace the original point, so that the three-dimensional surface becomes a side surface to avoid the normal reversal. 5.3.4.2 Defining the surface elements of the part
When defining the part by drawing a surface, the flow element system meets the following graphic requirements and is used to define the surface process and is specified as a small optional element; the parameters of the surface are defined by the line, which are defined as optional elements. 5.3.5 Whether to use
entities to define the actual shape of the part to support the manufacture or digital pre-assembly of special parts. If the entity is a solid, no additional surface and surface are required to define the surface of the part. 3.5.1 Basic principles:
Use solid lines to establish entities;
Use two points and two lines to establish entities! Related to the base and its irrelevant to the final design, except for the following: The features of the previous implementation should be concealed,
GH/2.19C9A—2003
The location of the hole should not be changed, and the original hole should not be modified. 5.3.5.2 The division of the solid model in the component
The solid model of the part should not be done separately, but the installation part, the parts in the assembly The entity type should be separated. The method is to separate the entity type of the high-end parts. The entity type of the high-end parts is the entity type of the high-end parts. The entity type is only used to describe the entity flux, not the definition of the model. E, 3.5.3 Entity layer || tt || 4 In the model layer table, each entity type defined in the zero layer should be separately raised. The object type should also be separately considered. 5.4 Common parts numbers 5.4.1 Short metal parts
Sheet metal parts are divided into two categories, expandable and non-expandable parts. To establish a coordinate system for the expandable parts, a point of the coordinate system should be defined at a corner of the part. When setting the coordinate axis, pay attention to the direction of the coordinate axis: the part is located in the positive direction of the drawing 3. Make sure 2=0. If the feed direction of the specified part is the positive direction, the feed direction of the x-axis should be changed: if the feed direction of the specified part is not the left direction, the x-axis should be changed. The long side of the component, such as the useful center of the component, should make the positive direction of the Z axis of the surface,
align with the coordinate system of the component, and the component can be unfolded. The same way, the component position should also be on the left side of the standard system, Ya, and the positive direction of the long axis of the component should be selected along the same axis.
Note: For an unfoldable component, you can use A[) software to calculate the kinetic energy, pick up the small mark, such as 4, and then form an unfolding shape after loading and bending. For three non-expandable components, 5 is common. Special certification parts need to be designed by the user - the parts can be quickly banned when the case is not available, 5.4.2 machine period workpiece construction building
Shenzhen soil parts mold to determine the effective control processing parts, determine the base belt CNC plus 1 and double-head tool path, etc. Three: Machine plus material is enough to see a god, from the heart A> price point of the North total of the relatively large amount of injection molding parts, generally do not need to buy special buried, practical insurance CA teaching department fat heart trace treatment machine plus 1 parts design
5.4.3 magnesium parts The mold of sensitive parts
The actual connection between parts and parts is fast. When changing the mold, it is necessary to define a space line and ten points, and use the table and reading line hard to read the mold surface.
5.4.4 Composite material mold
One or more pieces of material with the same laying order are called core layers: only when the pieces of material have the same laying order, material and direction, can they be called core layers. Generally, there will be multiple layers in the auxiliary design. Unless it contains multiple different material pieces, the auxiliary sheet should be shown in the drawing. Each layer must have a layer number and be given a layer number. It is not necessary to draw it in zero plane. Instead, it can be indicated by double points at two levels in the layer diagram. The final composite assembly should be constructed into an enveloping entity. For most composite assembly drawings, the stepped layers are complex and it is not possible to accurately draw each layer. Note that each material assembly can be The style of the plastic is plastic and the pressure is adjusted. 5.4.5 The whole digital pre-assembly
The chief participates in the micro-assembly of the part to be designed and matched into a physical damage system. In this way, the cumulative parts are checked in the assembly. There are ten limited docking conditions and each: change the design belt status. Note: The digital assembly of the car records all the ten phenomena of the entire production and solves all the same problems in the mountain. The current price is the same as the mathematical leading country. The large-scale selection of the limited assembly should be a room that has not been made yet. The product effect Ninghua has not been divided into seven steps: English double creation:
Effective data text;
Number of caresses:
Data slow mention:
Effective record inspection;
GB/Z 19098—2003
…The data are then divided into
before the product is released. According to the different design stages, these data should be collected in turn. 6 Engineering data sets
6.1 Classification of engineering data sets
1. Engineering data sets are classified in this way. According to the different types of parts described, they can be divided into machined parts data sets, sheet metal parts data sets, non-metallic pipe data sets, castings non-light parts data sets, and composite component data sets, etc.: According to the number of parts included, they can be divided into single-part data sets and multi-part data sets: According to the different uses, AD data sets can be divided into AM data sets and AM data sets. According to the different types of data, the data can be divided into different formats. 6.2 Engineering data
6.2.1 Classification of engineering data
The data in engineering data can be divided into non-engineering data. Engineering data includes two-dimensional, three-dimensional (inferred), and practical models and drawing data of parts, assemblies or installation parts. Non-engineering data also includes part matching information, such as help numbers, drawing numbers, etc., and also includes some auxiliary information for engineering, such as the data of some special parts of the project, which specifies the processing trajectory, parts table and processing information required for processing, etc. in the data file to prepare for the work of subsequent departments. 6.2.2CAD model classification
CAD models are divided into one-dimensional models and two-dimensional models. The three-dimensional model includes the three-dimensional model of parts, assemblies or components, and also includes the model of the position, and the second group includes CAD drawings, that is, the two-dimensional visual table showing the spatial elements. CAD drawings can be used to generate traditional drawings, or they can be used to generate film, drawing silicon copy and other similar materials. Society: CAD data is stored in both shares and the core model is copied. The two are divided into three-dimensional room working mode (SAI and LRAW) in the standard working mode. The "treatment between the users is related to the US joint device. For example, only the drawing element is introduced: FXTEACTEIRAWI.MNT. It is associated with the space system plan. When using ALXVIKWLA, a method is used from: one time, the entity of the space is changed to the original space position or the whole space is derived from the two-row drawing. 6.34D model drawing negative division
: there are two methods for the division of components, assemblies or installation types: the first is to divide them into types according to their internal structure: the second is to keep the parts when creating the space creation line standard model and the real model. The important parts of the parts are complete: 1A page difference: a model uses multiple pages to select the table,
1: (A model file is composed of the processing power and storage capacity of the machine, the segmented model is divided into several models and pages in the actual engineering application: the total single model
real single model
is often the simplest medicine core model. A data file only contains the three-dimensional model of the parts, and its three-dimensional drawings are scanned and displayed on the CAD drawing page. "A [A model uses multiple pages to describe, in the actual design, avoid using this model
multiple molds are made on a long drawing, all parts should keep the same version of the multi-page multi-film model - the divided model must be placed in multiple pages of a data set, and the All edit frames carefully type or wire drawing letter forget to put in the first person fast type
certificate? : In order to buy with ten, sometimes a business pregnancy collection what complex into the heart inch attention person, woman if defined in a person A12 German plate cattle, the calculation used by the plate to expand the space to ask the person I flow point original change recovery, the work efficiency reduction test sometimes production drawing can be signed parts of the second request drawing, out of a base too body stick can overcome complex or drawing drawing can be more talented to the requirements and
plan, with the name of the wire machine technology of the security more animal husbandry place of the place again micro will benefit the person school included letter forget knowledge will fry the end to help more 6.4 layer management
6.4.1 is the role of
GB/2.19098—2003
layer core AD carrier system environment each of which can manage the display of model data, through the natural device control model The display of the child's center element. The number of layers in the storage model is reasonable. Some, in the beautiful child's night, the general management of the layer is the key, the surface needs a zero design tree included in the validity period, not only the quantity of people, but also the three systems. If the hierarchical management is not carried out, the model number will be very chaotic, which is not conducive to the use and continuity of some work. In this regard, in the limit of the C person's fighting heart product function, the content of the amount of a layer is only slightly specified, which does not make the design hostage! Small, mountain month use layer heat for "limited individual changes according to the combined reading type of the population,
6.4.2 layer table structure
scale in the storage! The number of layers in the program is a supplementary modeling diagram, which is used to explain the multiple points of the child's element design on the layer used in the plan, that is, the child's element on the layer is the rise and fall of the use of the guard. The inner set and station structure of the layer table are reversed (no example 1). The structure of the layer table is a text description with a certain format on a two-dimensional visual; its result is a column, divided into three parts, the first column is the layer number, the second column is the annotation, and the third column is the layer content. The layer content is used to explain the elements contained in the layer for reference: the content of the layer includes part features and modifiers. bzxZ.net
Note that the required parts are included in the table.
is used to follow the order of the three columns of the table. The characters are composed of layer numbers, annotations, and the content of the layer. When two parts are used, the same data in the layers should be reviewed separately to distinguish them from each other. In the final model, the use of the layer should be described in the layer. If the last layer (the last element) is used, and there is no description in the layer table, it will be a problem during the model inspection. The function of layers and layer tables is to check the five important items in the model inspection.
layer table inventory
promise
1 grid seat area
【long purchase
123x4567-
edge standard determination of these total
melting water topic delivery
benefit of the interior
machine product special level
overall configuration geometry
Figure 1 layer table structure
non-international standard will stop correct
non-standard China Bank
GB/219098—2003
6.4.3 characteristics and regret symbols
characteristics and image screening symbols from the description layer of the interior , he returned to the department's heart what elements needed for product modeling classification feature I revision symbols are divided into standard symbols, standard specifications symbols (see Figure 2) and card marking characteristics, non-standard symbols, non-standard features and non-standard elements when the existing standard characteristics, standard specifications symbols can not meet the needs, small use of widely defined special features and revision symbols in the industry, the use of several internal control system, the actual entity's characteristics also: tt| ...
Set factory room
Figure 2 Standard material characteristics and standard decoration characteristics
Ma Chuan He
Scale small period two
An machine shows
An proposed water special
Key characteristics
Over the boundary play
Period welcome transformation
Holding characteristics and revision symbols are composed of characters, each character is followed by a space and a space. The number of special characters should not exceed 0.
6.4.4 Standard layer
The factory shall use all the data as required, such as semi-ordinate system, pattern selection, frame position, inverse text, etc. This common data shall be defined in the standard layer. There are 2 layers in the version data file, of which the 1st to 13th layers and the 23rd layers are standard layers. Other layers are used for production selection. The figure lists the layer numbers and 4th layers of the 11th layer, the 20th to 2nd layers, and the usage of the 1st to 13th layers shall comply with (3/T11655. Format
1--1:1
Standard practice
(GBT.SS:
Border certificate positioning point
Location: Standard parts
For Jiaoning
Figure 3 adopts the standard layer19098—2003
The AD system of each layer can manage the display of model data, and can control the display of the model elements through the device. The data in the layer storage model has its own rationality. In the case of the number of items, the general management of the layer is the key, and the effective period contained in the layer design tree is required. Not only the number of people, but also the three systems are developed. If the layer management is not carried out, the model data display control will be very chaotic, which is not conducive to the use and continuous work of some people. In this way, in the limit of the C-level product function, only the content of a layer is slightly specified, which is not convenient for the designer to use! Small, mountain month use layer heat for "limited individual change according to the combined reading type of population,
6.4.2 layer table structure
ruler in the storage! The number of programs in the modeling of the modeling of a supplementary figure, ruler to explain the geometric elements of the layer used in the plan, that is, the elements on the layer are used to protect the nature of the layer. The layer table reverses the internal set and station structure (no example 1). The construction structure of the layer table is a two-dimensional visual pressure with a certain format of text description; its subsequent compilation is a column, divided into three forces, the first column is the layer number, the second column is the annotation, the third is the content of the layer. Jiang Shichuan to explain the geometric elements contained in the layer is for reference: the content of the layer includes part features, modifiers.
Note the package needs to be produced,
are used to follow the order of the three columns of the table, the characters are composed of layer numbers, annotations, carbon if the composition, social 2 ：When two items are used, the same data in the same layer should be reviewed separately to distinguish between the two items. In the final model of the enterprise, the room used should be described in the layer. If the last layer is used, the last element should be used, and there is no such description in the dust layer table, then potassium will appear during the building model inspection. The function of the layer and the layer table is an important item in the calibration test.
Layer table inventory| |tt||Promise standard
1 grid seat area
【Long purchase
123x4567-
edge standard determination of these total
melting water topic delivery
benefit of the interior
machine production special level
overall configuration geometry
Figure 1 layer table structure
non-international standard will stop correct
non-standard China Bank
GB/21 9098—2003
6.4.3 Features and symbols
Features and symbols For the purpose of description, the classification of features and symbols required for product modeling is divided into standard features, standard features (see Figure 2) and non-standard features. When the existing standard features and standard features cannot meet the needs, the non-standard features and non-standard elements can be used. The special features and modification of the definition of the prohibition
in the line
ha use several
guiding number
huishanercun
internal control
special entity
external recovery line
real part
text end special also:
screw nature.
set body factory
Figure 2 standard physical characteristics and standard candidate decoration characteristics
Machuan The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: This data is as correct as possible, such as half-coordinate system, pattern selection, frame position, inverse text, etc. This common data should be defined in the standard layer. There are 2 layers in the version data file, of which the 1st to 13th layers and the 23rd layers are standard layers. Other layers are used for production selection. The figure lists the layer numbers and 4 products of the 11th layer, the 20th to 2nd layers, and the usage of the 1st to 13th layers follows (3/T11655. Format
1--1:1
Study standard practice
(GBT.SS:
Border certificate positioning point
Location: Standard parts
For Jiaoning
Figure 3 adopts the standard layer19098—2003
The AD system of each layer can manage the display of model data, and can control the display of the model elements through the device. The data in the layer storage model has its own rationality. In the case of the number of items, the general management of the layer is the key, and the effective period contained in the layer design tree is required. Not only the number of people, but also the three systems are developed. If the layer management is not carried out, the model data display control will be very chaotic, which is not conducive to the use and continuous work of some people. In this way, in the limit of the C-level product function, only the content of a layer is slightly specified, which is not convenient for the designer to use! Small, mountain month use layer heat for "limited individual change according to the combined reading type of population,
6.4.2 layer table structure
ruler in the storage! The number of programs in the modeling of the modeling of a supplementary figure, ruler to explain the geometric elements of the layer used in the plan, that is, the elements on the layer are used to protect the nature of the layer. The layer table reverses the internal set and station structure (no example 1). The construction structure of the layer table is a two-dimensional visual pressure with a certain format of text description; its subsequent compilation is a column, divided into three forces, the first column is the layer number, the second column is the annotation, the third is the content of the layer. Jiang Shichuan to explain the geometric elements contained in the layer is for reference: the content of the layer includes part features, modifiers.
Note the package needs to be produced,
are used to follow the order of the three columns of the table, the characters are composed of layer numbers, annotations, carbon if the composition, social 2 ：When two items are used, the same data in the same layer should be reviewed separately to distinguish between the two items. In the final model of the enterprise, the room used should be described in the layer. If the last layer is used, the last element should be used, and there is no such description in the dust layer table, then potassium will appear during the building model inspection. The function of the layer and the layer table is an important item in the calibration test.
Layer table inventory| |tt||Promise standard
1 grid seat area
【Long purchase
123x4567-
edge standard determination of these total
melting water topic delivery
benefit of the interior
machine production special level
overall configuration geometry
Figure 1 layer table structure
non-international standard will stop correct
non-standard China Bank
GB/21 9098—2003
6.4.3 Features and symbols
Features and symbols For the purpose of description, the classification of features and symbols required for product modeling is divided into standard features, standard features (see Figure 2) and non-standard features. When the existing standard features and standard features cannot meet the needs, the non-standard features and non-standard elements can be used. The special features and modification of the definition of the prohibition
in the line
ha use several
guiding number
huishanercun
internal control
special entity
external recovery line
real part
text end special also:
screw nature.
set body factory
Figure 2 standard physical characteristics and standard candidate decoration characteristics
Machuan The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: The key features of the key features are as follows: This data is as correct as possible, such as half-coordinate system, pattern selection, frame position, inverse text, etc. This common data should be defined in the standard layer. There are 2 layers in the version data file, of which the 1st to 13th layers and the 23rd layers are standard layers. Other layers are used for production selection. The figure lists the layer numbers and 4 products of the 11th layer, the 20th to 2nd layers, and the usage of the 1st to 13th layers follows (3/T11655. Format
1--1:1
Study standard practice
(GBT.SS:
Border certificate positioning point
Location: Standard parts
For Jiaoning
Figure 3 adopts the standard layer
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