How to mark concentricity in CAD
In CAD design, concentricity marking is an important technical requirement, especially in the fields of mechanical manufacturing and precision machining. This article will introduce in detail the methods, steps and related precautions of CAD concentricity marking, and attach recent hot topics and hot content to help readers better understand and apply this technology.
1. Basic concepts of CAD concentricity marking
Concentricity refers to the degree to which the centers of two or more circles coincide on the same axis. In CAD, concentricity annotations are often used to ensure the geometric accuracy and assembly performance of parts. The following are the basic symbols and meanings of concentricity markings:
| symbol | meaning |
|---|---|
| ◎ | concentricity symbol |
| 0.1 | Maximum allowable deviation value (unit: mm) |
2. Steps of CAD concentricity marking
1.Open CAD software: Start AutoCAD or other CAD software and open the drawing that needs to be marked.
2.Select annotation tool: Find the "Annotation" option in the menu bar and select the "Geometric Tolerance" or "Geometry Tolerance" tool.
3.Set concentricity symbol: In the pop-up dialog box, select the concentricity symbol "◎" and enter the allowable deviation value.
4.Specify datum and measured features: Select the base circle and the measured circle to complete the labeling.
3. Recent hot topics and hot content
The following are the hot topics and content about CAD and mechanical design on the Internet in the past 10 days:
| topic | heat index | Main content |
|---|---|---|
| CAD2024 new features | ★★★★★ | The new AI-assisted design function of AutoCAD2024 has triggered widespread discussion. |
| Combining 3D printing and CAD | ★★★★ | How to use CAD design to optimize 3D printing models has become a hot topic. |
| Mechanical Design Competition | ★★★ | Sharing of application cases of CAD technology in the National Mechanical Design Competition. |
4. Precautions for CAD concentricity marking
1.Benchmark selection: The reference circle should be selected with higher processing precision to ensure the accuracy of labeling.
2.Deviation value setting: Set the deviation value reasonably according to the actual use requirements of the parts to avoid being too tight or too loose.
3.Clearly labeled: Dimensions should be clearly visible and avoid overlapping with other dimensions or symbols.
5. Summary
CAD concentricity marking is an important means to ensure the geometric accuracy of parts. It is crucial for designers to master its marking methods and precautions. Through the introduction of this article, I hope readers can better understand and apply this technology. At the same time, paying attention to recent hot topics and hot content can also help designers keep abreast of industry trends and technology development trends.
If you have other questions about CAD concentricity marking, please leave a message in the comment area for discussion.
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