Purline parameterization blanking method based on CAD

Abstract

The invention discloses a CAD-based purline parameterized blanking method, which comprises the following steps of: establishing a blanking basic drawing module, a condition input module, a material list output module and a result output drawing module in CAD cartographic software, and respectively forming data links with the blanking basic drawing module by the condition input module, the material list output module and the result output drawing module; drawing a basic pattern template of the purline in the blanking basic pattern module; setting size adjusting parameters required by the basic pattern template; the size adjusting parameters are input into the condition input module, and the achievement output graph module draws a purline graph with the needed size in combination with the input size adjusting parameters and the basic graph template; the drawn purline graph is output through the result output graph module, and the required material list is output through the material list output module. Only a simple template needs to be drawn, lifelong application of one-time drawing is achieved, and through the parameterization automatic calculation principle, only basic data needs to be input in the condition input module, and then the needed machining drawing and the needed material table are obtained.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure and metal enclosure, and in particular to a purlin parameterized cutting method based on CAD. Background Art

[0002] The processing and production of steel structures must rely on processing details. With the popularization and application of computer technology, the drawing of processing details now mainly relies on CAD, TEKLA and other detailed drawing software. In particular, the enclosure substructure represented by purlins has the characteristics of large number of uses and many specifications and models. For example, using TEKLA detailed drawing software to model and cut a large number of purlins requires multiple processes such as modeling, drawing adjustment, and drawing output. The modeling and drawing adjustment cycle will be particularly long, and the software cannot intelligently merge specifications and models, resulting in a wide variety of purlin specifications, which will cause great trouble to subsequent processing and installation. If CAD is used to manually draw processing details, although specifications and models can be manually merged, when encountering complex projects, such as different wheelbases and more roof openings, it is necessary to consider the positioning of different functional holes of brace holes, corner bracing holes, and connection holes. There will be a lot of types that need to be manually laid out, and the amount of drawings is very large, because all the layout and engineering quantity statistics need to be completed manually, and it is easy to make mistakes. Summary of the invention

[0003] In view of the technical problems existing in the prior art, the present invention provides a CAD-based parametric cutting method for purlins, which can reduce repetitive manual drawing work. Only simple templates need to be drawn, and the templates can be applied to subsequent projects, so that one-time drawing can be used for life. At the same time, through the principle of parametric automatic calculation, only basic data needs to be input at the condition input end to obtain the required processing drawings and material lists.

[0004] The present invention adopts the following technical solution:

[0005] A parametric cutting method for purlins based on CAD is provided. A cutting basic drawing module, a condition input module, a material list output module and a result output drawing module are established in the CAD drawing software. The condition input module, the material list output module and the result output drawing module are respectively data-linked with the cutting basic drawing module. The specific cutting method is:

[0006] Draw the basic graphic template of the purlin in the basic drawing module;

[0007] Set the size adjustment parameters required for the basic graphic template;

[0008] Input the size adjustment parameters in the condition input module, and the output graph module combines the input size adjustment parameters with the basic graphic template to draw the purlin graphics of the required size;

[0009] The drawn purlin diagram is output through the result output diagram module, and the required material list is output through the material list output module.

[0010] Furthermore, the basic graphic template is provided with connecting holes at both ends, inclined brace holes arranged near the connecting holes, and multiple straight brace hole groups located between the inclined brace holes, and each straight brace hole group is provided with multiple straight brace holes arranged at intervals.

[0011] Preferably, the size adjustment parameters include quantitative parameters and variable parameters, the quantitative parameters are the margin a1 of the connecting holes at both ends of the purlin, the spacing b1 between the inclined brace holes and the connecting holes, and the hole spacing c of each straight brace hole group; the variable parameters are the hole spacing between two adjacent straight brace hole groups and the total length of the purlin.

[0012] Furthermore, the condition input module is provided with a calculation module for calculating the spacing between each straight brace hole group according to the total length of the purlin and quantitative parameters. The position size of each hole in the purlin is obtained through the calculation module, and the required purlin diagram is drawn in the result output diagram module.

[0013] Preferably, the material list output module outputs component number, specification, purlin length and quantity.

[0014] The technical solution of the present invention has the following advantages:

[0015] The present invention provides a method for parameterized cutting based on CAD, which can make complex 1:1 purlin lofting work simple and quick. It only needs to set a basic cutting drawing module, a condition input module and a result output drawing module in the CAD drawing software, draw the required basic drawing template in the basic cutting drawing module, and input basic data in the condition input module, so as to obtain the required processing drawing and material list. The cutting time can be saved by 2 / 3, and the accuracy of cutting may be improved. The specifications and models can also be merged manually, which reduces the difficulty of installation and improves the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a flow chart of the parametric cutting method of purlins provided by the present invention;

[0018] Figure 2 It is a schematic diagram of a blanking basic drawing module provided in the CAD drawing software of the present invention;

[0019] Figure 3 It is a schematic diagram of a material list output module provided in the CAD drawing software of the present invention;

[0020] Figure 4 It is a schematic diagram of a conditional input module provided in the CAD drawing software of the present invention;

[0021] Figure 5 It is an input size adjustment parameter setting column set in the CAD drawing software of the present invention;

[0022] Figure 6 It is a schematic diagram of a result output diagram module provided in the CAD drawing software of the present invention;

[0023] Figure 7 It is a parameterized object link setting column set in the CAD drawing software of the present invention.

[0024] The markings in the figure are as follows: 1- material list, 2- cutting drawing, 21- purlin, 22- connection hole, 23- inclined brace hole, 24- straight brace hole, 25- output material list. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figure 1 As shown, the present invention provides a purlin parametric blanking method based on CAD, a blanking basic drawing module, a condition input module, a material list output module and a result output drawing module are established in the CAD drawing software, and the condition input module, the material list output module and the result output drawing module are respectively linked to the blanking basic drawing module. The specific blanking method includes the following steps:

[0029]

S01

[0030] like Figure 2 As shown, first draw a basic graphic template of the purlin 21, the basic graphic template is provided with connection holes 22 at both ends, inclined brace 23 holes arranged near the connection holes 22, and multiple straight brace hole groups located between the inclined brace holes, and each straight brace hole group is provided with multiple straight brace holes 24 arranged at intervals. Different basic graphic templates can be drawn according to different needs.

[0031]

S02

[0032] The size adjustment parameters in the basic graphic template should have the following data information: a1 is the connection hole margin, which is generally a fixed value and is usually reflected in the design node; b1 is the distance between the inclined brace hole and the connection hole, which is generally a fixed value and is usually reflected in the design node; c1 / c2 / c3 are the straight brace holes, which are generally fixed values ​​and are usually reflected in the design node. Usually, the fixed values ​​do not need to be parameterized, and only the values ​​need to be entered here. In the figure, L1 / L2 / L3 is the distance between the straight brace holes, which is a variable; according to the change of the wheelbase, this distance value also changes accordingly. That is, the size adjustment parameters include quantitative parameters and variable parameters. The quantitative parameters are the margin a1 of the connection holes at both ends of the purlin, the distance b1 between the inclined brace hole and the connection hole, and the hole distance c of each straight brace hole in each straight brace hole group; the variable parameters are the hole distance between two adjacent straight brace hole groups and the total length of the purlin.

[0033] [S03] Input the size adjustment parameters in the conditional input module. The output diagram module combines the input size adjustment parameters with the basic graphic template to draw the purlin graphic of the required size.

[0034] The conditional input module is equipped with a calculation module that calculates the spacing between each straight brace hole group according to the total length of the purlin and the quantitative parameters. The position size of each hole in the purlin is obtained through the calculation module, and the required purlin graphics are drawn in the result output diagram module. Set the corresponding calculation formula in the calculation module, and the variable size will be automatically adjusted. The settings are as follows: Select the L1 value, right-click and select Insert field, such as Figure 5As shown in the figure, select the field type as object and the field name as formula, then enter the corresponding formula in the formula bar on the lower right side. Figure 2 For example, the distances of L1 / L2 / L3 can be made equal, then L1 = (Lz-X1-X2-2a1-2b1-2c1-2c2-2c3) / 3; similarly, L2 and L3 can be parameterized in this way, and the result is complete. Figure 2 Output the parameterized settings of the cutting drawing; because Lz is the data source and a variable value, the data source of Lz in the L1 formula needs to be linked to the data source in the same way. The operation method is as follows Figure 7 Select the field type as object and the field name as object; the "Object Type" link in the upper right corner is Figure 4 Lz; copy the bottom field expression "xxxxx" to Figure 5 In the formula on the right side of , the linking work of Lz data source is completed. Similarly, Figure 2 and Figure 3 The data that needs to be parameterized in the Figure 4 The data source of the conditional input module can be used.

[0035] [S04] The drawn purlin drawing is output through the result output drawing module, and the required material list is output through the material list output module, including component number, specification, purlin length and quantity, etc.

[0036] The present invention can realize the following functions: Figure 4 Conditional input module, input the corresponding basic parameters, such as component number, specification, vertical hole distance, wheelbase, component quantity, etc., which can be Figure 6 In the output file of the results, the corresponding data is automatically generated and modified, eliminating many operating steps such as manual adjustment of cutting drawings and material lists.

[0037] Anything not described in the present invention is applicable to the prior art.

[0038] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A CAD-based parametric cutting method for purlins, characterized in that: In the CAD drawing software, a basic drawing module for cutting materials, a condition input module, a material list output module and a result output drawing module are established. The condition input module, the material list output module and the result output drawing module are respectively linked to the basic drawing module for cutting materials. The specific cutting method is: Draw the basic graphic template of the purlin in the basic drawing module; Set the size adjustment parameters required for the basic graphic template; Input the size adjustment parameters in the condition input module, and the output graph module combines the input size adjustment parameters with the basic graphic template to draw the purlin graphics of the required size; The drawn purlin diagram is output through the result output diagram module, and the required material list is output through the material list output module.

2. The CAD-based parametric cutting method for purlins according to claim 1, characterized in that: The basic graphic template is provided with connecting holes at both ends, inclined brace holes arranged near the connecting holes, and a plurality of straight brace hole groups located between the inclined brace holes, and each straight brace hole group is provided with a plurality of straight brace holes arranged at intervals.

3. The CAD-based parametric cutting method for purlins according to claim 2 is characterized in that: The size adjustment parameters include quantitative parameters and variable parameters, wherein the quantitative parameters are the margin a1 of the connection holes at both ends of the purlin, the spacing b1 between the inclined brace holes and the connection holes, and the hole spacing c of each straight brace hole group; The variable parameters are the hole spacing between two adjacent straight brace hole groups and the total length of the purlin.

4. The CAD-based parametric cutting method for purlins according to claim 3 is characterized in that: The condition input module is provided with a calculation module for calculating the spacing between each straight brace hole group according to the total length of the purlin and the quantitative parameters. The position size of each hole in the purlin is obtained through the calculation module, and the required purlin diagram is drawn in the result output diagram module.

5. The CAD-based parametric cutting method for purlins according to claim 1, characterized in that: The material list output module outputs component numbers, specifications, purlin lengths and quantities.

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