DE1224689B - Method and device for manual or automatic regulation of the gap distance in screw-type sewing pipe works, preferably with a half-shell, open forming tool - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN WßTTWl · PATENT OFFICE Int. α .:

EDITORIAL

Number:
File number:
Registration date:
Display day:

B 21 c

German class: 7 b-9/01

1224 689
D 37073 I b / 7 b
20th September 1961
September 15, 1966

The welding gap width is common in the screw sewing pipe mills of the prior art by direct gap measurement by hand or automatically controlled by either a Pivoting the feed angle of the tape (tape leg) or the outgoing pipe (pipe leg) is effected. The acute angle between the Understood the direction of travel of the belt and the pipe axis. You can also swivel the tape or Pipe leg for the purpose of adjusting »the welding gap depending on the continuously measured bandwidth make what pushbuttons and pressure cans are used for. The pivoting of the hinge leg can happen by a stop on which the pipe is constantly applied because of the pipe rotation and the example is continuously adjusted by hand so that the welding gap remains the same.

In the case of the present invention, a method and a device for welding gap control ao tion proposed, preferably for such Sdhraubennahtrohrwerke of the prior art is applicable that have a half-shell open mold. Feeding the tape to the In such pipe mills, the forming tool takes place at an adjustable feed angle. To the welding of the edges of the tape, the tube formed runs over a guide, for. B. a bezel, away. The feed angle of the tape and the angle between the pipe axis and the tool axis can be continuously changed during pipe production to control the welding gap width.

The invention is based on the assumption that, as a rule, the welding gap width must be zero; H. the must touch the strip edges to be welded at the point where the weld takes place. at Experience has shown that the pipe is constantly striving to reduce the size of all molds To pivot feed angle α, which prevents the tube by a role assigned to the steady rest will. If now, as proposed according to the invention, the screw suture tube on the The pressure exerted by the pipe run is measured continuously, so the pressure fluctuations can be used as a measure of the continuous change of the angle between the pipe axis and the tool axis is used and thus the welding gap width can be kept constant or controlled.

The invention will now be illustrated schematically using an exemplary embodiment in which which a steady roll is indirectly connected to a pressure measuring device.

Method and device for by hand or
automatic regulation of the gap distance
Screw sewing pipe works, preferably with
half-shell, open molding tool

Applicant:

Driam.S. A., Vaduz (Liechtenstein)

Representative:

Dipl.-Ing. H. Lesser, patent attorney,

Munich 61, Cosimastr. 81

Named as inventor:
Wilhelm Eckhardt, Paris

The drawing shows a view of the stationary and inventively designed bezel provided behind the screw suture pipe work (viewed from the outlet end of the screw suture pipe 1). The pipe axis 2 always retains its direction in a known manner, regardless of whether the hinge leg 13 is pivoted or the angle between the pipe axis and the tool axis is changed. The steady rest has three guide rollers 3, 4 and 5, which can be adjusted diagonally according to the pitch angle of the screw seam. The lower guide roller 3 acts as a support roller for the welded pipe; it takes the weight of the screw-seam pipe 1. The guide roller 4 is mounted on a pivotable double lever 6 and absorbs the pressure of the screw suture tube 1 acting in the direction of arrow 7 and increasing the gap. The pressure is transmitted via a displaceable piston arranged in a cylinder 8 to a pressure fluid provided in this cylinder; a certain hydraulic overpressure is generated there, which can be read on a pressure gauge 9. The correct filling and position of the piston in the cylinder 8 can be carried out in a known manner, e.g. B. by a hydraulic pump 10 with drain valve 11 can be achieved. A shut-off valve 12 is provided between cylinder 8 and pump 10 . The guide roller 5 is intended as a safeguard to prevent the pipe 1 from running away.

The device works as follows: At a certain contact pressure of the screw suture tube 1 on the guide roller 4 there is a corresponding hydraulic overpressure in the cylinder 8, which is

609 660/147

meter 9 can be read. If this pressure changes, this is a sign that im Welding gap a similar pressure change has occurred, so that the operator of the pipe work the corresponding control devices, for example to pivot the hinge leg, can operate until the previously existing pressure is set again. It is readily apparent that instead of one Reading of the pressure gauge and control of the feed angle by means of a contact pressure gauge or similar devices can be automatically effected in a manner known per se.

Claims (4)

Patent claims: 1. A method for manually or automatically regulating the gap distance between the strip edges to be welded in screw-seam pipe works, in which the strip is fed to a preferably half-shell, open forming tool at an angle that can be set and changed during work, where it is deformed to form the pipe and welded, whereupon the Pipe via a guide, e.g. B. bezel expires, and the angle between the tube axis and the tool axis can be changed, characterized in that the exerted from the tube (1) on the guide (3, 4, 5) in a direction parallel to the plane of the incoming strip (13) Pressure is continuously measured and the adjustment of the angle between the pipe axis and the coil feed direction or the tool axis takes place as a function of the pressure fluctuations on the pipe guide (4, S) . 2. Device for performing the method according to claim 1, characterized in that the roller (4) of the guide (3, 4, S) on which the screw suture tube (1) acts continuously in the sense of a reduction in the feed angle, adjustable and with a pressure gauge (9). connected is. 3. Apparatus according to claim 2, characterized in that the roller (4) of the guide (3, 4, S) is connected to the piston rod of a piston guided in a cylinder (8) and to the pressure chamber of the cylinder (8) except for one Setting a selectable pressure and setting the roller (4) serving pump (10) with drain valve (11), a pressure gauge (9) is connected, with between pump (10) and :. Cylinder (8) has a shut-off device. 4. Apparatus according to claim 3, characterized in that a contact manometer is used as the pressure measuring device, through which the feed. angle is controllable. Considered publications:
German Auslegeschrift No. 1104 916,
098 478, 1095 238, 1075 530;
Belgian patents nos. 564 130, 550 693. Legacy Patents Considered:
German Patent No. 1118 128. 1 sheet of drawings 609 660/147 9.66 © Bundesdruckerei Berlin