SU633653A1 - Method of manufacturing hollow profiled articles - Google Patents

Description

I

The invention relates to the processing of metals by pressure and can be used in the manufacture of hollow products by transverse rolling.

A known method for producing hollow sections, in which a mandrel is inserted into a hollow plug, then the billet is rolled in wedge calibers, moving the Mauw deforming center from the central zone of the billet to its ends along the {1) axis.

The disadvantage of this method is the impossibility of obtaining thin-walled products, due to the loss of stability of the thin-walled billet during rolling.

To expand the technological capabilities by increasing the stability of thin-walled billets, a mandrel consisting of two parts that are split across the axis is used, and during rolling, parts of the mandrel are moved from the central zone of the blank to its ends at a speed equal to the speed of movement of the deformation zone.

The drawing is a schematic diagram of the implementation of the proposed method.

The workpiece is compressed by two rolls 1 and 2 with wedge bars, between which parts of the mandrel 3 and 4 are mounted with the rolled work piece 5.

Before the start of rolling, parts of the mandrel 5 are closed at the ends, and as the rolls rotate and the wedges are inserted into the workpiece metal, the mandrels dissolve in opposite directions synchronously with the expansion of the wedge gauges.

oAt present, this method has been tested experimentally with a shchekatka hollow periodic tubes with a diameter of 60-10 mm with a wall thickness of 6-15 mm from carbon and alloyed steels.

5Actival effect of the introduction

of the method of rolling the electric shaft of electric motors will be more than 1 million rubles.

Claims (1)

The invention of the method for producing hollow sections, in which a hollow EBO / WT billet is then rolled into wedge gauges, moving the center of deffation from the central zone of the billet to its ends along the axis, by increasing the stability of thin-walled billets, a mandrel consisting of two parts that are split across the axis is used, and during the rolling process, parts of the mandrel are moved from the central zone of the blank to its ends at a speed equal to speed of movement of the deformation zone. 6 34 Sources of information taken into account during exportation: 1. Horns and. V. and Pozdnkov, OD, Cross-wedge rolling hollow billets, Proceedings of the Gorky Design Technological Institute, 1971, Vt.1 (36), 43-56, p .14.