Parametric Design Application Based on Solidworks Thread Pair

1. Threaded Hole Parameter Design

Thread machining is one of the most common operations in manufacturing. Threaded connections are also frequently seen in engineering drawings. When designing a part, engineers often have to search for and manually draw thread patterns, which significantly slows down the design process. SolidWorks' Hole Wizard is a powerful tool designed specifically for creating various types of holes. It allows for parametric design of each hole and automatically generates detailed drawings, saving valuable time for engineers.

1.1 First, create a flat plate to prepare for the parametric design of the threaded hole. This step ensures that the hole can be easily modified later if needed.

1.2 Use the Hole Wizard Tool in SolidWorks to drill the plate.

(1) Draw a positioning sketch on the surface to be drilled to help with accurate placement during the drilling process.

(2) Click on the Hole Wizard icon, select the type and size of the hole you want to drill, and place the threaded hole according to the positioning sketch. In this example, we chose an M10 threaded hole with a depth of 20 mm and a thread depth of 15 mm, as shown in the image below.

Figure 1

Figure 2

As shown in Figure 2, when using the specialized hole wizard tool in 3D design, the thread's major and minor diameters are clearly visible in the 2D drawing, which fully complies with our national drawing standards.

2. Parametric Design of Thread Pairs

2.1 First, use the SolidWorks standard parts library to retrieve a screw and pair it with a plate that has a pre-drilled threaded hole.

2.2 Retrieve standard parts from the design library. Then assemble the flat plate, screw, and connecting plate into a single assembly. Save the file and generate the 2D drawing. At this point, you may notice an issue—please see the image below.

We noticed that the assembly drawing lacked the usual thread representation line, making it unclear that it was a threaded connection. This is not an accurate representation. To fix this, use the "Insert Selection Model Item" tool.

After confirming the changes, you will see that the assembly drawing now correctly reflects the structure of the threaded pair.

Summary: Using SolidWorks' parametric design for threaded pairs makes it easy to modify designs at any time. This approach simplifies the design process, speeds up development, and improves overall efficiency. It’s a must-have tool for modern engineering workflows.

Flow Control Valve (Mechanical)

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