SU1486215A1 - Method of rotary pressing-out of hollow articles - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used in the manufacture of parts of various types with double walls. The purpose of the invention is the expansion of technological capabilities due to

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manufacturing parts with offset. relative to the bottom walls. The method is performed in two transitions. On the first transition, an unsealed part of the workpiece is cut through its thickness with an additional deforming tool with simultaneous surface plastic deformation of its external surfaces by a pressing tool in the direction from the periphery of the workpiece to its center. On the second transition, the cleaved, uncompressed part of the workpiece is shifted along its longitudinal axis. In this case, parts may have a double wall of both conical and other complex shapes. 3 il. .

The invention relates to the processing of metals by pressure, in particular to methods of rotational extrusion of hollow parts from disk blanks.

The purpose of the invention is the expansion of technological capabilities through the manufacture of parts with offset relative to the bottom walls.

Figure 1 shows the initial state ^ in figure 2 - dissection of the workpiece; on fig.Z - forming a part with a double wall.

The method is as follows.

Flat billet 1 is clamped in its central part between mandrel 2 and clamp 3. Along the periphery of billet 1, a set of deforming elements 4 and 5 is placed, between which a dissecting unit is placed, containing disk 6 and two sets of deforming elements 7 and 8, disk 6 in the same area sharpened Then include the drive of the mandrel 2, the workpiece 1 begins to rotate. In the direction perpendicular to the axis of the mandrel 2, serves a set of deforming elements 4 and 5, and in parallel with them and the dissecting unit carrying the disk 6 with the deforming elements 7 and 8, the process of surface plastic deformation of the ends of the workpiece 1 and its dissection with the formation of the semi-finished product 9. The formation of the semi-finished product 9 ends the first transition. The second transition is started by turning the cutting unit by 180 degrees, while a set of deforming elements is inserted into the cut part of the workpiece. Then carry out the process of forming

1486215 A1

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- parts 10 with inner 11, outer .12 layers and a circular cavity 13, for which, by means of the component elements 4,5,8, the dissected part of the semi-finished product 9 is displaced in the direction of forming a cone.

Example. The material AD1M was used with a thickness of 6 mm, with a workpiece diameter of 150 mm and a mandrel diameter of 60 mm. The diameter of the deforming elements is 19 mm (standing on the ends), the deforming elements of the dissection unit 10 mm. The number of revolutions of the mandrel is 200 per minute, the feed lateral 15 of the first transition is 0.2 mm / rev, the feed for forming a cone is 0.87 mm / rev (the second transition), the thickness of the disc for dissection is 5 mm (with an angle of 60 degrees). 20

The method is applicable to the production of double-wall parts of both conical and other complex shapes from soft highly plastic materials for a number of industries, for example, engineering, instrument-making.

Claims (1)

Claim The method of rotational extrusion of hollow articles, including clamping the central part of the flat blank, giving it a rotational movement and plastic deforming the non-pressed part of the product with a pressing tool placed on both its ·· sides, in order to expand technological capabilities by obtaining parts with twins walls displaced relative to the clamped part of the workpiece, on the first transition, dissect the not pressed part of the workpiece through its thickness with an additional deforming tool. with a simultaneous surface plastic deformation of its external surfaces with a pressing tool in the direction from the periphery of the workpiece to its Center, and at the second transition, the cut unclamped part of the workpiece is displaced along its longitudinal axis. ^one eight eight 1486215 Fig.Z