DE1752646A1 - Pin protection for cold pilger mills - Google Patents

Description

Patent attorneys
.W.Möiwn «r

. H. Tischar 2 /. JtfKf 1900

M 562.

Mannesmann - Meer AG · ,,

405 Mönchengladbach, Karmannsstraasβ 29.

ITl 562> thorn safety device for Kaltpilgerwalzuiarke,

The invention relates to a Dornaichnrung for Cold pilger mills that are exclusively non-ferromagnetic Process rolling stock.

Whether, as is well known, in the case of cold pilger mills by far major part of the operational disruptions due to the rupture of the IUaIzciornes on the most stressed part of the üornkonusee occurs, security measures were taken to prevent the front part of the thorn being released on his inevitable longitudinal movement by switching off the system to limit.

In general, apart from mechanically or hydraulically operating mandrel break protection devices, they are not only due to due to their inertia, but also due to their structure, such anti-rupture devices are known, in which rays are effective which penetrate the rolling stock, e.g. X-rays, where «in Radiation transmitter and a radiation receiver are provided that act on a relay that actuates the limit switch when the radiation is interrupted, including the thorn «

109823/0435

end one that is impermeable to the rays used Part has (OBP No. 1 o23 441) or that the radiation transmitter in the Oornspitze or on an extension the same is attached inside the tube (ΟΘΡ No. 1 o33 619).

The harmful radiation has a disadvantageous effect on machine operation, so that additional * borrowed the prescribed ones through special protective measures Safety regulations are to be observed.

Oa the relevant industry already specializes in the processing of certain materials It is the object of this invention, with the exclusive processing of non-ferromagnetic !!) rolled stock in cold pilger mills to eliminate the source of radiation that is harmful to the operator, without doing so neglecting the safety of the Oornbruch.

This object is achieved according to the invention by the Use of a proximity switch known per se for ferromagnetic material, the mandrel bar an extension made of farromagnetic material learns that up to the vicinity of the approach scarf ters is enough, whose contact zone is better known illegally when it comes into contact with the Oornstanjen extension Outputs an electrical signal to the separate amplifier that controls a Relsis that acts on the enechalfcer of the rolling mill and the electrical circuit leading to the rolling mill interrupts.

An embodiment of the invention is given by hand

10 9 8 2 3/04 3 5

the accompanying drawings according to FIGS. 1 and 2 in more detail explained, with the drawings, for example, an electronic proximity switch door ferromagnetic material show what does not exclude the a magnetic switch can also be used.

Fig. 1 shows schematically the invention Mandrel break protection at a cult pilgrim rolling mill for non-ferromagnetic rolling stock and

Fig. 2 is a schematic diagram of the fuse.

HJie can be seen from Fig. 1, a non-ferromagnetic one Tube 2 on mandrel 1 by means of the u / alzen 3 machined, the mandrel 1 is provided with a ferromagnetic extension 4, which is at a small distance 5 of the contact zone 7 of the proximity switch 6 is arranged, which is in connection with the amplifier and a RaLaia 9, via which the proximity switch 6 with the limit switch of the U / alzwerketromkreis Io connected is.

Thus, as shown in FIG. 2, when approaching the ferromagnetic Mandrel extension tip 4 en the response zone 7 shows the inductance of the induction coil 12 and thus the reactivity dee from this and the capacitor 11 existing electrical oscillating circuit changed, whereupon via the amplifier β and the relay the circuit Io leading to the rolling mill from the mains connection 13 is separated.

Claims t - 4 -

: 5

Claims (1)

Expectations 1 «Mandrel protection for cold pilger mills, which exclusively rework non-ferromagnetic rolling stock, characterized by the use of a proximity switch known per se, namely an electronic or a magnetic proximity switch for ferromagnetic Material in a known manner via an amplifier and a relay with the limit switch of the rolling mill connected, the effect of which is triggered by the wandering of the mandrel bar 2 «mandrel lock according to claim 1,
characterized, that the mandrel bar is an extension made of ferroAagne Own material *. 10 9 c / ^ / 0 L 3 5 Lee r side