(l) select the scale, set the drawing width
According to the size of the drawn figure, select the appropriate drawing scale and drawing paper width.
(2) fixed drawings
Selected drawings will be fixed on the drawing board with tape paper. When fixed, the horizontal edge of the drawing should be parallel to the working edge of the T-square, and the distance between the lower edge of the drawing and the bottom edge of the drawing board should be greater than the width of a T-square.
(3) drawing frame and title bar
According to national standards for the format, perimeter dimensions and title bar location, the first with a fine solid line drawing paper boundary lines, frames and title bar. Title bar can be used in the format shown in Figure 1.7
(4) the position of the graphic layout
Graphic layout on the drawing of the location should strive to be proportional, should not be biased or too centralized in a corner. According to the length and width of each graphic size, draw the baseline of each graphic, and take into account that there are enough graphic surface to note the size and text description, etc..
(5) draw the base drawing
First from the positioning dimensions to draw all the datum lines of the figure, and then according to the stereotyped dimensions of the main contour lines, and then draw the details of the part. When drawing the base drawing, it is appropriate to use a harder pencil (2H or H). Underdrawing lines should be drawn light, thin and accurate so that they can be easily erased and modified.
(C) pencil deepening lines
Deepen the lines before carefully proofread the base drawing, correct errors, erase excess lines or stains, to ensure that the line is in line with the provisions of national standards. Deepen different types of lines, should use different types of pencils. Deepen the drawing line can be generally connected to the difficult order of the cooley: different types of lines, the first thick, solid, after the fine, false; round and straight, round after straight; multiple horizontal lines, first up and then down; multiple vertical lines, first left and then right; more than one concentric circles, first after the big; and finally deepen the diagonal lines, frames and title bars.
(D) labeling size
Graphic deepening, should be the size of the boundary, size lines and arrows are drawn at once, and finally write the size of the numbers and symbols. Note that the labeling size should be correct, clear, in line with national standards. (E) fill in the title bar and other necessary text description
(F) check and organize
To be drawn after the completion of all work, after careful examination, there are no errors and omissions, and finally in the title bar, "Drawing" in a frame signed with the name and date of drawing.