Abstract: This article introduces the series design of carbon steel valve lugs based on SolidWorks, from design calculation to data import, and finally drives the whole process of generating serialized models.
Keywords: SolidWorks; hangers; serialization 0 INTRODUCTION Computer-aided design has matured over years of development, and in order to shorten design time, serialization and parametric design became inevitable. SolidWorks has great advantages in these aspects. It is the first Windows-based CAD/CAM/CAE/PDM-based desktop integrated mechanical 3D CAD software implemented in the Windows environment. It is known for its simplicity and ease of use, and it has become a major design tool for many designers. In the original, we designed the part is to first query some basic data, and then substituting into the calculation formula, to obtain the results, and then based on the results of the drawing, sometimes we have to modify the drawings over and over again according to the actual situation. And this is just a specification design. If there are five, ten, twenty, or even more specifications, this workload can be imagined. This not only wastes a lot of time, but also consumes more of the designer's energy. In fact, many parts in mechanical products have a certain degree of similarity in structure, and the basic structure of similar parts only differs in some details or dimensions. If we can design these different specifications of the parts in batches, and then use these parameters to drive our design drawings, the efficiency will increase tenfold and hundredfold. The basic conditions for product serialization design are as follows: 1 The parts to be serialized have the same core technology and the same appearance in different specifications; 2 The serialization of parts is a design that meets the market demand, and it is not a simple serialization without explicit purpose. . This time, the lifting eye of a carbon steel valve body is taken as an example to introduce its entire parametric design process in detail.
1 Shape Design Before designing and calculating, we need to design the appearance shape of the undercarriage. We use SolidWorks software to make a model diagram (Figure 1) and a drawing (Figure 2).
2 The design of the parameter table design parameter table includes two parts, one part is the design calculation table, the other part is the parameter table of the format specification that needs to be finally imported into the software, and we finally need to associate the parameters of these two tables to realize only The purpose of the drawing model can be driven by changing the calculation table.
The first step is to calculate the design of the table: first list the parameters obtained from the relevant data, then insert the relevant calculation formula into the EXCEL table to obtain the result, and then compare the verification result with the permissible parameters. See Figure 3. From the data in the figure, it can be seen that the calculated actual shear stress is less than the allowable shear stress, and the above data is correct. At this time, we can pull down the 800-10 lines of data, and then change the data of each row of different specifications of the valve lug, can meet the stress requirements in the case of the valve lug data have a general grasp of the formation of a regular The parameters are such that there will be no case where the lug parameters of the large size valve are smaller than those of the smaller size.
The second step, meeting the design of the parameter list of SolidWorks requirements: We need to look at the code of each dimension of the model of the lug in SolidWorks. After selecting the 3D model, the model will show the code of each dimension: One is the sketch size. Such as DI @ sketch l, D2 @ sketch l, D3 @ sketch 1 ...; the other is the physical shape of the size such as DI @ Boss a stretch 1. The data table exported by SolidWorks is also formed by these data, then we only need to import these dimensions in the external table according to the above format and then import them to batch form different configured entities.
Then we design the SolidWorks parameter table in the calculation sheet label “sheetl†table. In fact, we can associate all the parameters in the table with the data in the tag “cast steel valve lug†so that we only need to change the design calculation. Data can be synchronized to the SolidWorks parameter table, which in turn drives the formation of 3D solids.
3 parameter import, drive 3D point open In the menu bar at the top of the SolidWorks interface, enter the - table - design table, and then select "from file" browse to select our SolidWorks parameter table, Figure 4 appears, and then click the blank space, Figure 5 appears , point to determine.
Then, referring to FIG. 6, different valve calibers appear in the lug configuration, and thus the serialization of the three-dimensional entity is completed.
4 Drawings of the lugs of different caliber valves are arranged in the drawing diagram of the valve lugs, the labels below the right-hand drawing are copied, and then pasted. When the dialog box for inserting and pasting is displayed, it is directly determined that a new one appears in the label position below. Label, right click this new tab and rename it 800-10 Enter. Then we also need to configure each view, select each view separately, select 800-10 to determine in the left configuration drop-down menu, so that the 800-10 caliper valve lug is set (see Figure 7), then other caliber The same method is used to complete the drawing configuration of the valve lug (see Figure 8).
After saving the drawing, we also need to configure the name and code of the drawing so that the drawing is complete. First switch to the 3D solid interface, click on the menu bar, file, properties / configuration specific, then the following dialog box appears, click to apply to the menu, you can see a lot of different valve caliber configuration. We first select 800-10, and then add the required attributes on the drawing title bar below: material, part name, part number, etc. In this way, the data of the 800-10 lifting ear title bar is configured, and then the other calibers are selected one by one to be configured.
At this point, our entire carbon steel valve rings based on SolidWorks serialization, parametric design is completed; follow-up if there are other caliber valves to design lugs, you can right-click on the series of parts design table, edit the table in a separate window According to the previous method, the new caliber valve lug data will be added, and then a new configuration drawing will be formed step by step.
5 Conclusion With the complication of the valve structure, two-dimensional CAD can no longer meet the daily design needs, three-dimensional software is constantly improving. The design idea of ​​SolidWorks software is in line with our thinking in the valve design project. Its new parameterized design will inevitably become the most powerful tool of our time. It can effectively improve our work efficiency and reduce the company's design costs. In order to shorten the designer's design cycle and reduce data errors in the drawings, we should actively accept and use these new generations of design tools with a positive attitude so that we can become more and more ashamed of water in our daily design work.
Keywords: SolidWorks; hangers; serialization 0 INTRODUCTION Computer-aided design has matured over years of development, and in order to shorten design time, serialization and parametric design became inevitable. SolidWorks has great advantages in these aspects. It is the first Windows-based CAD/CAM/CAE/PDM-based desktop integrated mechanical 3D CAD software implemented in the Windows environment. It is known for its simplicity and ease of use, and it has become a major design tool for many designers. In the original, we designed the part is to first query some basic data, and then substituting into the calculation formula, to obtain the results, and then based on the results of the drawing, sometimes we have to modify the drawings over and over again according to the actual situation. And this is just a specification design. If there are five, ten, twenty, or even more specifications, this workload can be imagined. This not only wastes a lot of time, but also consumes more of the designer's energy. In fact, many parts in mechanical products have a certain degree of similarity in structure, and the basic structure of similar parts only differs in some details or dimensions. If we can design these different specifications of the parts in batches, and then use these parameters to drive our design drawings, the efficiency will increase tenfold and hundredfold. The basic conditions for product serialization design are as follows: 1 The parts to be serialized have the same core technology and the same appearance in different specifications; 2 The serialization of parts is a design that meets the market demand, and it is not a simple serialization without explicit purpose. . This time, the lifting eye of a carbon steel valve body is taken as an example to introduce its entire parametric design process in detail.
1 Shape Design Before designing and calculating, we need to design the appearance shape of the undercarriage. We use SolidWorks software to make a model diagram (Figure 1) and a drawing (Figure 2).
2 The design of the parameter table design parameter table includes two parts, one part is the design calculation table, the other part is the parameter table of the format specification that needs to be finally imported into the software, and we finally need to associate the parameters of these two tables to realize only The purpose of the drawing model can be driven by changing the calculation table.
The first step is to calculate the design of the table: first list the parameters obtained from the relevant data, then insert the relevant calculation formula into the EXCEL table to obtain the result, and then compare the verification result with the permissible parameters. See Figure 3. From the data in the figure, it can be seen that the calculated actual shear stress is less than the allowable shear stress, and the above data is correct. At this time, we can pull down the 800-10 lines of data, and then change the data of each row of different specifications of the valve lug, can meet the stress requirements in the case of the valve lug data have a general grasp of the formation of a regular The parameters are such that there will be no case where the lug parameters of the large size valve are smaller than those of the smaller size.
The second step, meeting the design of the parameter list of SolidWorks requirements: We need to look at the code of each dimension of the model of the lug in SolidWorks. After selecting the 3D model, the model will show the code of each dimension: One is the sketch size. Such as DI @ sketch l, D2 @ sketch l, D3 @ sketch 1 ...; the other is the physical shape of the size such as DI @ Boss a stretch 1. The data table exported by SolidWorks is also formed by these data, then we only need to import these dimensions in the external table according to the above format and then import them to batch form different configured entities.
Then we design the SolidWorks parameter table in the calculation sheet label “sheetl†table. In fact, we can associate all the parameters in the table with the data in the tag “cast steel valve lug†so that we only need to change the design calculation. Data can be synchronized to the SolidWorks parameter table, which in turn drives the formation of 3D solids.
3 parameter import, drive 3D point open In the menu bar at the top of the SolidWorks interface, enter the - table - design table, and then select "from file" browse to select our SolidWorks parameter table, Figure 4 appears, and then click the blank space, Figure 5 appears , point to determine.
Then, referring to FIG. 6, different valve calibers appear in the lug configuration, and thus the serialization of the three-dimensional entity is completed.
4 Drawings of the lugs of different caliber valves are arranged in the drawing diagram of the valve lugs, the labels below the right-hand drawing are copied, and then pasted. When the dialog box for inserting and pasting is displayed, it is directly determined that a new one appears in the label position below. Label, right click this new tab and rename it 800-10 Enter. Then we also need to configure each view, select each view separately, select 800-10 to determine in the left configuration drop-down menu, so that the 800-10 caliper valve lug is set (see Figure 7), then other caliber The same method is used to complete the drawing configuration of the valve lug (see Figure 8).
After saving the drawing, we also need to configure the name and code of the drawing so that the drawing is complete. First switch to the 3D solid interface, click on the menu bar, file, properties / configuration specific, then the following dialog box appears, click to apply to the menu, you can see a lot of different valve caliber configuration. We first select 800-10, and then add the required attributes on the drawing title bar below: material, part name, part number, etc. In this way, the data of the 800-10 lifting ear title bar is configured, and then the other calibers are selected one by one to be configured.
At this point, our entire carbon steel valve rings based on SolidWorks serialization, parametric design is completed; follow-up if there are other caliber valves to design lugs, you can right-click on the series of parts design table, edit the table in a separate window According to the previous method, the new caliber valve lug data will be added, and then a new configuration drawing will be formed step by step.
5 Conclusion With the complication of the valve structure, two-dimensional CAD can no longer meet the daily design needs, three-dimensional software is constantly improving. The design idea of ​​SolidWorks software is in line with our thinking in the valve design project. Its new parameterized design will inevitably become the most powerful tool of our time. It can effectively improve our work efficiency and reduce the company's design costs. In order to shorten the designer's design cycle and reduce data errors in the drawings, we should actively accept and use these new generations of design tools with a positive attitude so that we can become more and more ashamed of water in our daily design work.
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