You will need
• - a sheet of paper of format A4;
• - drawing Board;
• - drawing supplies (pencils, compass, eraser, etc.);
Instruction
1
Via buttons or adhesive tape secure to the drawingBoard Noah a sheet of drawing paper format A4 (210x297 mm) narrow side up. Draw a frame the drawingand, stepping back from the edge of the sheet 20 mm from the left side and 5 mm on the other sides.
2
Find the GOST nutsthat you want to draw (for example, GOST 5915-70). It contains a drawing of the nut in two projections and a table size of standard nuts. The value of the diameter of the thread find the nut in the table, the drawing which you intend to perform. In the table, the diameter of the thread indicated by the letter d. Remove from the table all the values of the dimensions of the nut (m, d, s, e).
3
Select the scale drawing. It needs to be selected so that the image was clearly visible all the details of the drawingand, simultaneously, the sheet has sufficient space for dimensioning. As for the image of the nut are the two projections located adjacent to each other along the horizontal axis, determining to select the scale is the size of the sheet width (185 mm inside the frame). Select a scale such that the width of the two projections ( m + s) occupied 1/3 – 1/4 of the 185-ti mm.
4
Multiply the dimensions taken from the table, for the selected scale. The obtained values represent the dimensions in which the nut must be depicted in drawingE.
5
Swipe up on the sheet in the horizontal axis projections. She should defend from the top of the plate to approximately 1/3 of its length. Draw the vertical projection axis of the nutintersecting with the horizontal axis. The distance from the left edge to the first vertical axis and the distance between the first and second axis must be respectively about 50 and 80 mm. These values are given roughly, they can be different. Importantly, the ratio of used and available disk space on the drawinge looked harmoniously.
6
Set the compass size ?e (half the distance between opposite corners of the hexagon nut). From the center of the second projection draw a circle. Write in it an equilateral hexagon (contour nuts). Side of the hexagon should be equal to the Radus of the circle. Draw two more circles from the same centre – one continuous thick line (bore diameter), the second thin ? the circumference (diameter of thread). Erase the first circle, she played a supporting role and no longer will need.
7
Using the existing second projection and size taken from the table appropriate to the scale, draw the first projection of the nut, as a pattern use the drawing of GOST (in our case, GOST 5915-70). Your drawing should be identical to this drawing, differing from it only in size.
8
Apply to drawing all dimension line and select dimensions – again, in full accordance with the drawingout of GOST. In the free field below the projections in the form of numbered paragraphs state the requirements for the product in respect to its hardness, accuracy class, presence or absence of heat treatment, etc.
9
Draw a frame for the sheet format the drawingand fill it in. The shape and size of the frame, and also the procedure for its completion depend on what the organization intended this drawing (for educational institutions, manufacturing enterprises, research institutes, etc.). Different organizations may have their own forms and its own procedure for filling in the sheet.