SU416131A1 - - Google Patents

Description

one

The invention relates to the processing of metals by pressure and can be used in the manufacture of pipelines in chemical and petroleum engineering.

Punches are known for forming toroidal parts from sheet blanks. The stamp contains poa.nson and a matrix with working and vertex structures that have a shape corresponding to one and a half.

However, the known stamps give a significant thinning of the workpiece in the molding process.

The aim of the invention is to reduce the thinning of the preform during molding.

For this, the matrix is composed of two coprically located parts, of which the central part, forming the inner quarter of the torus, is installed in the outer, forming the outer quarter of the torus, with the possibility of axial movement in the molding process to form a common stream corresponding to the shape of one and a half.

The invention is illustrated in the drawings.

FIG. 1 shows the design of the stamp; in fig. 2 - stamped part; in fig. 3 - preparation; in fig. 4 is a schematic diagram of the noetaine deformation of the workpiece.

The stamp for forming toroidal elements of the spliced-welded taps contains a matrix made up of two concentrically arranged parts — an external fixed part.

1 and the central movable 2, which is supported by the ejector 3, the punch 4, the clamp 5 and the centering pin 6.

The process of stamping is carried out as follows.

The sheet blank is mounted on the movable part of the die 2 and the pins 6 are centered on the hole in the workpiece and held by the clamp 5. Under the action of force from the punch 4, the workpiece begins to deform and, when the work stroke of the puaison is half the total stroke sizes. Punch 4, continuing to move, begins to overcome the resistance of the ejector 3 of the press and to form the outer contour of the part in the stream of the fixed part 1 of the matrix. The process is monitored by the press stroke and ends with the calibration of the entire part.

Subject invention

A mold for forming toroidal elements of sheet metal-welded bends containing a punch and a matrix, characterized in that, in order to reduce the thinning of the workpiece during the molding, the matrix is composed of two concentrically arranged 1-: asters from which the central part,

decorating the inner quarter of the torus is installed in the outer one that decorates the outer quarter of the torus, with the possibility of axial movement, in the n-molding process to form a common stream corresponding to the shape of one and a half.

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