Engineering Sheet Metal Drawing Notes

Unit iv sheet metal working economical considerations stamping forming and other cold working processes.

Engineering sheet metal drawing notes.

A bend table lists propertied of all bends in a flat pattern view of a sheet metal part. Blanking and piercing bending and forming drawing and its types cup drawing and tube drawing coining hot and cold spinning. Fig shows the shearing of sheet metal between two cutting edges. After you insert the bend table in the drawing bend tags are added to the selected drawing view.

How to dimension a drawing. The shearing action is illustrated in the figure. Accuracy in the use of the scale rule. Engineering graphics is an effective way of communicating technical ideas and it is an essential tool in engineering design where most of the design process is graphically based.

Just before the punch contact work 2. Formability of sheet metal is the ability of sheet metal to be drawn into cups or formed into the desired shapes without any defect. Punch begins to push into work causing plastic deformation 3. Bend annotations a bend note adds fabricating information to sheet metal bend centerlines.

However in order to have a measure for sake of comparison the limit drawing ratio ldr is taken as a measure of drawability. Engineering graphics is used in the design process for visualization communication and documentation. Engineering drawing basic sheet layout title block notes engineering working drawings basics. Drawing force power and number of stages defects in products.

Bend notes are associated with a drawing view. In making the layout for this cleat the following points must be kept in mind. Bend tags associate rows in a bend table with the view geometry.