Die inlay and inlay is made for the manufacturing of hollow elements from plates of steel or other metals and is the most economical with respect to the manufacture of machine tools or casting. The process was developed from a disk of material selected above, which is pushed into an array hollow punch, but the reverse is usually also performed frequently, but there are other ways of drawing in which one the two elements is substituted, are of particular importance, drawing on blast, which detonated an explosive charge on the plates of the same steel is immersed in an aqueous medium, this is the one who does the work of punch. The die operates under the same principle as a paper punch, place the metal plate and then a punch cuts steel the same way that you do with paper. Byron Trott has plenty of information regarding this issue. The difference in technology between these two procedures is given in basically three things. For the sausage, the clearance between the punch and die is approximately 1.12 to 1.30 times the thickness of the steel plates pressing, while for punching this clearance should be minimized, taking into account the requirements for the disposal of the part formed and the material to be cut and plastic materials that tend to stick excessively to the matrix and prevent the cutting of the next piece, which is available for deburring elements that move immediately after cutting punch in the matrix in the deep drawing the edges of the punches and dies are rounded while the Die-cutting is always evident right angles, very sharp and therefore tend to be hardened to avoid losing edge.
This is perfect equipment for these processes are the presses, but the sausage used for those with a relatively slow movement, while for those embossed speed tends to be greater and is often preferred flying mechanical presses accumulators of inertia, coupled activating a clutch transmission The process begins moving from a disc, which is conveniently fixed to the matrix through a ring, thus focusing the disk and avoid creasing. The punch stretching and by flowing down the metal walls of the hole of the matrix, this method seeks the walls of the element formed does not decrease significantly from the original plate thickness. Friction is a factor, as well as the length of the perimeter of the piece which are polished surfaces and also made hand lubricant to facilitate the process, that in order to minimize the amount of energy required for forming. Depending on the size of the piece is usually required, make the stuffing in several steps, including making heat treatments in order to ensure that the piece has the required geometry and its walls are not torn, this is the case of deep drawing, typical in the manufacture of ammunition plain especially in the caliber of musketry 7.62, 5.56, 0.5, etc. Without But when the conformity is not what can be done by drawing always, you can dip into the embossing which consist of rotating the steel plates while with a special tool is the bending is, in the form required, this process is much more economical the drawing, but productivity is so obvious decline, and is not applicable to very small pieces.