SU109839A1 - Method and stamp for the manufacture of corrugated pipes from metal tape - Google Patents

Description

The existing methods for manufacturing cylindrical corrugated pipes from pre-welded or stretched cylindrical billets are associated with the great laboriousness of their manufacture or the complexity of the tooling for their implementation.

The way and the invention are simpler and at the same time more productive.

The essence of the invention is that the metal tape is first profiled into a straight corrugation in a specially shaped die, after which the straight corrugation is bent along the side of the reciprocating punch along the arc of a circle of the necessary radius.

A shtamp design for the manufacture of a fade-in endless corrugated spiral bent along a certain radius is shown in FIG. 1 and 2.

The metal strip is centered prior to entering the profiling die consisting of the upper and lower portions.

In the profiling die, the formation of a metal strip into a straight corrugation is carried out by gradually increasing the angle of inclination of the side wall of the corrugation.

The obtained straight corrugation from the profiling die enters the forming part of the stamper, which consists of sector 1 of the pressure roller 2 and the side punch - the insert 3, which is attached to sector I (Fig. 1).

At the working stroke of the press ram, a wedge 4 (Fig. 2) moves the forming part of the chip to the right (in tangential direction) along the arc of a circle of the required radius, and D.L.To ensure the rotation of the wedge in the shank 5, a stop ball bearing 6 is installed. springs and pushers 7, is wedged in a cone, created by the surface of the side punch liner 3 and the sector slot, with the result that the material being forged is clamped tightly between the pressure roller 2 and the insert punch.

Mixing the forming part of the punch in the tangential direction leads to straightening the straight corrugation along the surface of the side punch insert in the section between the pressure roller and the output part of the profiling, its die (not shown), and at the same time the profiling and alternation of the meta occurs ; 1 face tape in profilirush, eat it filiere.

Moving the die part in a tangential direction along a circular arc is achieved by fabricating sector / and base 8 with bar 9 to the desired radius. All this together forms the dovetail connection. During the return stroke of the press ram, the lower part of the wedge 4 will move the forming part of the stamp to its original position (counterclockwise), while the stamped workpiece remains stationary, as the roller 2 does not press the workpiece in this case punch liner.

After the press ram has returned to its highest position, the cycle is repeated.

Thus, in one working stroke of the press, the shaping of the profiled corrugation is carried out on an area of such length as the mixing of the forming part of the stamp from the wedge 4 is calculated for.

In order to prevent the folding of the material being stamped when profiling into a straight line corrugation and during

it is provided on the side punch in the die: pressing the workpiece in the core die using a hydraulic cylinder (not shown) and covering the straight corrugation along the side of the side insert with the necessary tension of the right angle at the expense of creating a certain force of the workpiece hydraulic cylinder in the profiling die.

Subject invention

Claims (3)

1. A method of manufacturing corrugated pipes from a metal tape, characterized in that, with the aim of obtaining an endless spiral, which after subsequent welding forms a corrugated pipe, the metal tape after profiling it into the corresponding section in the profiling filler is covered by a side belt 1u reciprocating along the arc of a circle of the required radius. 2. A stamp for carrying out the method according to claim 1, characterized in that, in order to prevent the material being formed from being folded, the material is deformed in a closed shaping die and the forming part of the stamp and is accompanied by a clip-on material to be stamped using a roller from the corresponding wedge. 3. The form of shtamp manufacture according to claim 2, characterized in that, in order to prevent the forming of the material to be compacted, a hydraulic cylinder is used that ensures the application of the deformable workpiece in the profiling die and creates the necessary tension in the stampable material during wrapping it along the punch.