How to learn to read pictures quickly?

1. Learn to read part drawings first, then learn to read part drawings, and then learn to read assembly drawings. Learn the basic knowledge of drawing step by step from simple to complex. The assembly drawing is composed of various parts, and the part drawing is composed of various parts. Let's talk about the fastest way to understand part drawings.

2. You should know that the most basic lines in the picture are thick solid lines, thin thick lines, dotted lines, wavy lines, double broken lines and so on. Thick solid lines are commonly used to indicate the outer contour of parts, thin solid lines are often used in dimension line, and dashed lines are often used in the center line. The component elements of a part drawing are composed of various lines, so remember the types and applications of lines first.

3. It should be known that the part drawing is composed of three unfolded drawings projected from three sides, namely, front view-front projection, top view-horizontal projection and left view-side projection. The positional relationship: the top view is below the main view, and the left view is on the right side of the main view.

4. The front view reflects the length, height, up and down, left and right of the part. The top view reflects the length, width, left, right, front and back of the part, and the left view reflects the height, width, up and down, front and back of the part. Its projection law is: long alignment, high level uniformity and equal width.

5. When analyzing the drawings, we must first find the center line or the reference line on one side of the part. Then, look at the size of the drawing. The dimension unit of mechanical drawing is mm (industry default, generally, units are not marked, only numbers are marked). Pay attention to the direction of drawing dimension. The horizontal length dimension is digital vertical, and the height dimension is generally read by the digital head in the left direction.