Stamp for drawing body parts

 

The invention relates to the field of sheet metal forming. Stamp for drawing body parts contains the punch, the matrix pertainym threshold and seizure under puritaine edge placed in the clamp. Pertaini threshold matrix is shifted from its exhaust flange to the periphery. Excavation under puritaine edge performed between the exhaust edge of the matrix and pertainym threshold and adjacent to it. This puritaine edge mounted with a gap relative preteenage threshold equal to the thickness of stamping material taking into account the positive tolerance on the thickness of the sheet. Achieved reduction technology allowance of the workpiece and, consequently, reduction of waste metal. 2 Il.

The invention relates to the field of sheet metal forming and can be used for drawing of various sheet materials.

Preemptive scope - hood presses on simple and double action body parts of automobiles, tractors, agricultural machinery, household appliances and other equipment.

Famous stamp for drawing body parts, containing the punch, the matrix pertainym threshold and clamp with pertainym edge, placed in the zone of peretyagin the area preteenage threshold width of this threshold should be significantly larger (approximately 3 times) traditional 12-15 mm (2) and therefore, for drawing this stamp harvesting must also be enlarged, to its edges advocated pertaini threshold. Technological allowance, extruded from a billet material is formed at the final deformation at such permainan the threshold of increased width and, as a consequence, also has overestimated the width. As technological allowance after the crop is removed in the waste, then the waste is removed the excess metal, which leads to a high consumption rate of sheet metal on the item.

An object of the invention is the saving of sheet metal.

The technical result of the use of the invention is the reduction of technological allowance of the workpiece and hence the reduction of waste metal.

The mentioned technical problem is solved due to the fact that the stamp containing the punch, the matrix pertainym threshold and seizure under puritaine edge placed in the clamp, pertaini threshold matrix is shifted from its exhaust flange to the periphery. Excavation under puritaine edge performed between the exhaust edge of the matrix and pertainym threshold and adjacent to it, and puritaine edge mounted with a gap relative preteenage threshold equal to the thickness of stamping material taking into account the positive tolerance on the thickness l is about after trimming the waste, reduced, thereby decreasing the dimensions of the sheet and the saving of sheet metal.

In Fig.1 shows a cross section of the die of the extrusion. In Fig.2 is a view of a stamp in the final drawing.

Stamp drawing contains the punch 1, matrix 2 with pertainym threshold 3 in the form of a U-shaped depression and the clamp 4 with pertainym edge 5.

Press double action stamp works as follows. Sheet workpiece is placed on the clamping surface of the matrix 2. Further, when the course outside of the press slide down the edge of the billet is deformed and is pressed by the clamp 4. In this case, the billet is drawn into the gap width between Z pertainym threshold 3 and pertainym edge 5. At the end of the press slide down the Central part of the billet is deformed by the punch 1. In the process of extracting the edge portion of the workpiece is moved through pertaini threshold 3 height H1and puritaine rib 5, which is pertaini threshold 3 value of N2. Inhibition of the workpiece when moving through pertaini threshold 3 and puritaine rib 5 is regulated mainly by changing the values of H1and H2that are estimated by the method and adjusted when debugging this stamp is for viterbirate 6 in the gap between pertainym threshold 3 and pertainym rib 5, is on line 7.

On a similar scheme operates stamp sequential pertainym threshold and pertainym edge on a simple press of the action.

Sources of information:

1. Copyright certificate №1442292, B 21 D 22/02.

2. Romanovsky, B. N. Handbook of cold stamping. - L.: engineering, 1979, S. 181, Fig.158.

Claims

Stamp for drawing body parts, containing the punch, the matrix pertainym threshold and seizure under puritaine edge placed in the clamp, wherein pertaini threshold matrix is shifted from its exhaust flange to the periphery, the recess below puritaine edge performed between the exhaust edge of the matrix and pertainym threshold and adjacent to it, and puritaine edge mounted with a gap relative preteenage threshold equal to the thickness of stamping material taking into account the positive tolerance on the thickness of the sheet.



 

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