What is DEEP DRAWING
Deep drawing is the name of the operation in hydraulic press operation. It is called drawing when the hight of the part is equal or less than twice the diameter of the part and it is called deep drawing when the height of the part is more than twice the diameter of the part. Deep drawing is a serial production method usually used in cookware, kitchenware industries, fire extinguisher manufacturing processes, filter manufacturing and so on.
How does a deep drawing hydraulic press work? The press is operated by two hydraulic cylinders. the bigger one is called the main cylinder and is generally located on the upside of the press and the smaller one is located under the lower table of the hydraulic press. The operation starts by placing a metal disc on the mould of the press and by pushing the start button. Here with the sencronised movement of the cylinders the male mould starts to enter the female mold thus allowing the metal sheet between them to change its shape and get a pot form.
The deep drawing moulds are also special type mould equipment which are all prepared specially upon the technical drawing of the part to be fabricated with the deep drawing hydraulic press. After the upper and lower cylinders get aparted the part which is deep drawn is left inside the mould and the process is finished
The deep drawing hydraulic presses can be as big as 5000 Tonnes, which are used to press parts for the automotive industry. The cylce time changes according to the complexity of the part. One important point to remind before we finish this chapter, the metal sheet disk needs to be greased well before put on the mould as the deep drawing process is a high friction operation where the male and female moulds drag on each other and for the nice outlook of the part produced the disk needs to be greased beforehand