FR2484295A2 - METHOD FOR DIRECTLY BEGINNING THE ROLLING OF PIPES AND APPARATUSES FOR THE IMPLEMENTATION OF THE PROCESS - Google Patents

Abstract

THIS ADDITION CONCERNS AN APPARATUS FOR PRIMING ROLLING WITH PILGRIM OF TUBES. THE STOPPER IS FORMED BY TWO STOP LEVERS 20, OPPOSED HORIZONTALLY, MOUNTED ON THE ROLLER CAGE SO AS TO BE HYDRAULICALLY RELEASED AND EQUIPPED WITH INTERCHANGEABLE STOP JAWS 21. MANUFACTURE OF METAL TUBES.

Description

The invention relates to an apparatus for initiating rolling with a pitch of

  pilgrim, in a pilgrim mill stand of a hollow ingot slid on a mandrel, the hollow ingot being maintained during the priming of the rolling, to emse an axial coulisosent - in the direction of advance on the mandrel by an interchangeable stop attached to the front end of the hollow ingot, mounted on the outlet side of the roll stand, which can be inserted pivotally into the interstice of the rolls, upside down from the direction of the mouth, to the vicinity of the plane of the cylindraeo axes and receiving at least partially Lim = drn, according to braveot prinoipalo

  In the main patent, one derives a process and -

  EARLY APPARATUS FOR LEADING DIRECTED LANIZAGON TO DOPOTE OF PIERREIN DRIVED BY THE LENGATION OF THE CUTTING MACHINE INTO THE CUTTING BOAT IN THE LANDING BOARD IN THE FIELD OF PIERIA, THE MOVEMENT OF THE WALKING MATERIAL verc the avat being liLitie when oat oontaot d'adc6renco took place oat the matter to laminor and the tioner to rererer the bZ of the peséte inveQti n is e poroogtieoEO ca ee the device defined above Solon linavecn'ion, this sblème Oct e solved by the fact that the planned stop is formed of deox levers oppose opposite hoerizontalement, mo.tés on the cage of mill to maneuver to erase hydraulically and equipped

  from me to 5 * inter * hangables.

  The advantages of the apparatus according to the invention reside in the direct transmission of the force due to the application of the thrust levers on the one hand on the cage and on the other hand on the hollow ingot by the thrust bearings. Thanks to the lateral arrangement, better protection against heat is ensured; in addition, the gene caused by

  scale and by water vapor is less.

  Stopper jaws are easily accessible

  when it is necessary to change them, for example when

  they are worn out or when the change is dictated by the dimensions. Thanks to the pivotally positioned stop levers, the device can be easily swiveled out of the area

working.

  One possible embodiment of the apparatus according to the invention

  FIG. 1 shows the apparatus at the beginning of the priming, the rest position being shown in dashed lines; and Figure 2 shows the latitudinal disposition of the device

on the cage.

  As can be seen in the drawings, on the lateral surfaces of the cage 10 are arranged fixed support points 6 'intended for thrust levers 20. Each thrust lever 20, designed in the form of a cranked lever, carries jaws of interchangeable stop 21 and is connected by the other end to a cylinder 23 with the possibility of rotation. It can be seen from FIG. 1 how the abutment jaws 21 limit the hollow ingot 16 during the initiation of rolling. On the stop lever 20, wear strips

  22 are arranged interchangeably.

  Figure 2 shows the lateral arrangement of the apparatus # the rolling mill rolls 14 and the mandrel 15 being arranged

in known manner in the cage 10.

  When the apparatus is actuated, the cylinders 23 are actuated in such a way that the thrust levers 20, by the bearing points 6 ', pivot inwards until they are applied against the cage 10. In this position,

  the thrust levers 20 limit the advance of the hollow ingot.

  The thrust levers 20 are again brought out of the posi-

  working with cylinders 23,

  With the aid of the wear strips 229, the apparatus can be adjusted.

-3-

Claims (2)

  1.- Apparatus for initiating the rolling & no basking, in a basking machine stand, of a hollow ingot slid on a mandrel, the hollow ingot being maintained during the priming of the rolling, for pocketing a slider axial direction - in the direction of travel - on the mandrel by an interchangeable stop adjacent to the frontal side of the hollow ingot, mounted on the output side of the roll stand, which can be inserted by pivoting in the gap of   cylinders, upstream of the direction of travel, to the   the plane of the axes of the cylinders and receiving at least partially the mandrel, according to claim 1 of the main patent, characterized in that the abutment provided is formed of two stop levers (20), horizontally opposed mounted on the cage of rolling mill so as to be able to fade hydraulically and provided with jaws interchangeable stoppers (21).   2. Apparatus according to claim 1, characterized in that the stop levers (20) have interchangeable wear strips (22) by which the levers rest on the roll stand (10).