In the pattern, the figure only represents the shape of the object, the size of the object and the positional relationship of each part, which needs to be determined by the size. There are two kinds of solid lines in mechanical drawing: thick solid lines and thin solid lines.
The width d of thick solid line is selected between 0.5mm according to the size and complexity of the figure, and the width of thin solid line is about d/2. The width of the dimension line is usually the width of the thin solid line. In the same style, similar lines should have the same width.
Words and fonts
Font: The font of Chinese characters is required to imitate Song Dynasty, and the font "Imitation Song _GB23 12" of Windows system can be used, and the font of pictographic characters can also be used, such as gbcbig.shx; ; Letters and numbers can use the Windows system font "Imitation Song _GB23 12" or gbenor.shx font.
Word height and width-height ratio: the order of word height includes: 1.8mm, 2.5mm, 3.5mm, 5mm, 7mm, 10mm, 14mm, 20mm, general size 3.5mm, description text 5mm. The font of title bar is 5 mm or 7mm according to the table height in the parts list. ; The aspect ratio is 0.667, which is used for fixing.