SU1507492A1 - Apparatus for continuous forming of metals - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in the continuous extrusion of wire and profiles. The purpose of the invention is to increase the yield by eliminating the leakage of material into the gap between the groove and the abutment and the expansion of technological capabilities by increasing the stretch ratio. The extruded material is captured and fills the movable part of the groove gauge of the work roll 1, is fed up to the stop 2 and is extruded through the die 5. The width of the groove at the base exceeds the distance between its rectilinear walls. An undercut is formed on the roll groove and a layer of adhered metal cannot come out of the gauge without much additional effort. 2 Il.

Description

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The invention relates to the processing of metals by pressure, in particular to devices for pressing non-ferrous metals in the manufacture of wire and profiles from long and continuous blanks, as well as powder and granular materials.

The purpose of the invention is to overcome not only great friction forces on the roll surface, but also to create a significant axial force required for additional deformation when leaving the undercut of the groove

Experiments show that the shape of the burr section according to FIG. 2 after the stroke is suitable by eliminating the leakage, about to increase the pressure of the press 15

20

neither the material in the gap between the groove and the abutment and the expansion of technological capabilities by increasing the stretch ratio.

FIG. 1 shows a device along the axis; FIG. 2, section A-A in FIG. one .

The device for continuous pressing of metals comprises a driven work roll 1, an emphasis 2, a shoe 3, pushed by a shoe 4, a die 5, on the work roll there is an annular groove with a circular base 6.

The device for continuous pressing of metals operates in the following 25 ways.

The extruded material picks up and fills the movable part of the gauge formed by the walls and the base of the groove of the work roll 1 and pad 3, is fed up to the stop 2 and is extruded through the matrix 5. The base of the work roll groove 6 is curved. The width of the groove at the base exceeds the distance between its rectilinear walls, and the width of the stop is made equal to this distance. Due to this, an undercut is formed on the roll groove and a layer of adhered metal cannot escape from the gauge without much additional effort. In addition, the contact area of the adhered metal with the roll area increases. As a result, the adhered metal layer is forced to rotate together with the roller, since for its extrusion from the gap it is necessary

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nor 1.4-1.6 times, which provides an increase in stretch by 25-30%.

In the proposed device, a positive effect is achieved not only by increasing the surface of adhesion of the burr with the roller, but mainly by creating an undercut when it mates with the roller and increasing the stiffness of the section. Due to this, the resistance to ejection of a burr from a caliber increases by a factor of 2-3, the pressure of pressing by a factor of 5 to 6, and an increase in the stretch ratio by 80–120%.

Claims (1)

Invention Formula A device for continuous pressing of metals, containing a work roll, on the cylindrical surface of which there is an annular groove with flat walls, perpendicular to the axis of rotation of the roll, and a curvilinear base, as well as a block mounted above the groove and an emphasis placed in the groove between its walls, characterized in that , in order to increase the yield by eliminating the leakage of material into the gap between the groove and the stop and expanding technological capabilities by increasing the draw ratio, the basis ue groove in its cross-section formed circular, the width of the groove formed at the base circle diameter C greater than the distance between its planar walls. to overcome not only large friction forces on the roll surface, but also Create a significant axial force required for additional deformation at the exit from the undercut of the groove, Experiments show that the shape of the burr section according to FIG. 2 pos-o increase press pressure5 0 five 0 five 0 five nor 1.4-1.6 times, which provides an increase in stretch by 25-30%. In the proposed device, a positive effect is achieved not only by increasing the surface of adhesion of the burr with the roller, but mainly by creating an undercut when it mates with the roller and increasing the stiffness of the section. Due to this, the resistance to ejection of a burr from a caliber increases by a factor of 2-3, the pressure of pressing by a factor of 5 to 6, and an increase in the stretch ratio by 80–120%. Invention Formula A device for continuous pressing of metals, containing a work roll, on the cylindrical surface of which there is an annular groove with flat walls, perpendicular to the axis of rotation of the roll, and a curvilinear base, as well as a block mounted above the groove and an emphasis placed in the groove between its walls, characterized in that , in order to increase the yield by eliminating the leakage of material into the gap between the groove and the stop and expanding technological capabilities by increasing the draw ratio, the basis ue groove in its cross-section formed circular, the width of the groove formed at the base circle diameter C greater than the distance between its planar walls.