This example introduce the method of drawing the two views of the butterfly nut. Two points should be noticed, draw the inner tangent line by using ‘object snap’ ; the inner thread should be drawed by the thin solid line, and expressed as 3/4 circle in the plan view. The shape is shown in Figure 0.
Task 1. Adopt the template file
Adopt the template file in the disk which belongs to the book. Choose the pull-down menu → , select template in the dialog box and then find the file ,
D\AutoCAD\system_file\part_temp_A1.dwg, and then single click the button.
Task 2. Creat the front view.
Step 1. Set up new layers in Figure 1.
(1) Click thebutton and then the button to create a new draw layer called center line layer , modify the line type is center and the colour is red.
(2) Create a new draw layer called solid line layer, modify the lineweight is 0.3, and another layer called dimension layer , modify the colour is blue, others remained the same.
(3) Create a new draw layer called dashed line layer, modify the line type is ISO dash .
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