Pulled deep process of developed process General following: first according to products of shape to estimates out blank of diameter; then estimates out the artifacts of total pulled deep coefficient, and judge the pulled deep pieces whether can once pulled deep finished, also is needed by times pulled deep to made; in set pulled deep times, and each road process of drawing coefficient zhihou, on can determine out the process of middle products of shape, to completed pulled deep process of developed. At the time of development of drawing technology, most often used all kinds of stamping technology personnel manuals, formulas, charts and according to the manual available on the calculation.

Calculation coefficient using the formula m total total =m1m2... MN =DN/d0 m DN for drawing the final diameter d0 for the blank diameter. M1,M2,MN coefficient of each drawing.

The selection of drawing coefficient is based on table selection, such as stainless steel (0Cr18Ni9Ti) lowest coefficient as 0.52~0.55 for the first time, minimum subsequent drawing coefficient is 0.78~0.81.

Calculated on the drawing height of each operation can be calculated according to the different shapes with different formulas. With the development of drawing technology, adopting new technology and equipment, such as Bian Lila deep, can further reduce the coefficient.

Drawing is the main one of the stamping process, application is very extensive, our daily life any containers, metal products, household electrical appliances shell, liner, the hood of the car and motorcycle parts, panels, are forming the application deep drawing, hydraulic stretching device of the machine is the most important, with mold can produce a variety of products with different shapes.