DE1180340B - Method and device for keeping the welding gap constant when producing screw sutures - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: B 21 c

Number:
File number:
Registration date:
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German classes : 7b -9/01

1180340
M54713Ib / 7b
5th November 1962
October 29, 1964

When producing welded, in particular, high-frequency welded screw sutures the band running towards the welding point must be used to achieve a consistent, flawless quality Weld seam and a constant pipe diameter have a constant width. One uses therefore, as a rule, strips that are trimmed at the edges or machined without cutting.

With normal rolled strip, deviations of the strip width from the target value cannot be avoided. Such influences are determined with the help of special, the size of the gap or the width measuring Sensing devices determined and compensated. For this purpose, the pipe leg is in the sense of a constant Swiveled gap, while the inlet angle of the strip is kept constant, as the The tape feed table and the forming station remain fixed. Because diameter of the pipe, bandwidth and inlet angles are mutually dependent (& = jr-D-sina), one obtains with this procedure Changes in the diameter of the finished pipe. In addition, roof formations can occur because of the band sabers occur on the pipe and local conicities.

Other known systems for the production of screw sutures are therefore designed so that the tape feed table can be swiveled continuously around a king pin relative to the pipe axis can. This pivoting takes place automatically in cooperation with the sensing device, when the width of the tapered strip or the gap width changes. Kinematically the other way round can also made the feed table stationary and the deformation station pivotable about a pin will. The latter arrangement has the disadvantage that the pipe leg, d. H. the draining pipe, constantly changes its direction of discharge. The pivoting of the hinge leg is therefore usually easier. You can also combine both procedures in that the ligament limb is used to compensate gross deviations of the band and the pipe legs to compensate for the errors second Degree is moved.

However, experience has shown that band sabings cannot be removed economically by trimming; mostly they are only copied. When running in a band with saber-like can through Changing the inlet angle of the welding gap can be kept constant for a short time; surrender anyway There are more or less strong deviations in shape of the finished pipe because of saber-like behavior lead to conicities.

With the invention, by saberaticals of

Method and device for keeping the welding gap constant when producing
Screw sutures

Applicant:

Mannesmann Aktiengesellschaft,

Düsseldorf, Mannesmannufer 1 b

Named as inventor:
Dipl.-Ing. Gerd van Ceuyk,
Adolf Weiß, Düsseldorf

Band of constant width caused deviations in shape of the pipe are combated.

According to the invention, the adjustment is carried out while keeping the angle of emanation α constant, which is known per se of the table or the forming station by moving the table parallel to the pipe axis or - kinematically reversed - carried out by moving the deformation station in the pipe axis.

The table or the forming station run over pins in guide rails that are parallel to the pipe axis are.

This measure makes it possible to adjust the welding gap and without controlling the inlet angle to keep the diameter of the finished pipe constant.

An exemplary embodiment of the invention is shown schematically in the drawing. The strip feed table 5, which carries the strip reel 1, the straightening machine 2, the strip edge processing device 3 and the driving device 4, has the running rail 6 at its rear end, the pins 7 and 8 of which in the two guide rails 9 and 10, respectively, which are arranged parallel to the pipe axis to run. The guide rail 12, in which the pin 13 slides, is arranged below the band deformation device 11, likewise parallel to the pipe axis. With 14 the usual guide device for the finished wound pipe 15 is shown.

If the tapering strip 16 has a saber-shaped deviation, then with the aid of the (not shown) Tactile and the control elements connected to these, the table 5 correspondingly parallel to shifted along the pipe axis, whereby the welding gap and the diameter at a constant inlet angle of the finished wound pipe can be kept at a constant value.

«9 70S7105

Claims (2)

Patent claims: 1. Method for keeping the weld gap size constant when producing welded, in particular high-frequency welded screw sutures, with the tape of constant width, in particular trimmed tape, from one opposite the pipe axis at the inlet angle inclined feed table of the forming station and by strip edge scanning Determined deviations of the belt from the nominal shape by adjusting the table be compensated with respect to the shaping station or vice versa, characterized in that that by keeping the inlet angle constant («), which is known per se, the adjustment by moving the table (5) parallel to the pipe axis or, kinematically reversed, through Moving the deformation station (11) takes place in the pipe axis. 2. Apparatus for performing the method according to claim 1, wherein the tape feed table depending on an appealing one in the event of deviations of the strip from the nominal shape Strip edge scanning device is adjustable with respect to the forming station, or vice versa, characterized in that the pin (7, 8) is one at the rear end of the tape feed table (5) arranged running rail (6) in guide rails (9, 10) parallel to the pipe axis and one on the deformation station (11) located pin ίο (13) in a below the pipe axis and parallel with this arranged guide rail (12) run en. Considered publications:
German Patent No. 527,391; German exploratory documents No. 1118 128,
1104916; German utility model No. 1787 609;
French Patent No. 1023 904;
Belgian Patent No. 550 693;
British Patent No. 442 352. 1 sheet of drawings 409 709/105 10.64 © Bundesdruckerei Berlin