DE1627231A1 - Guillotine shears for cutting rolling stock moving at high speed, preferably pipes - Google Patents

Description

Patent attorneys Dfpi.-ing. Walter Meissner "". ,, Dipl-ing. Herbert Tischer BERLIN 33, HERBERTSTRASSE 22 ID ZI £. O I MUNICH

Telephone: 8 87 72 37 - Wireword: Invention Berlin Postal check account: W. Meissner, Berlin value 12282

Bank account: W. Meissner, Berliner Bank A.-Q., Depka 38, _t __ ", ... __,""" .. η ,, ·,.,. λ-ζ τ, ·, · *. * A Berlln-Halensee Kurföretendamm «30 ΐ BERLIN 33 (GRUNEWALD), deril 3» June HerbertetraBe 22 M / Zi

Case M

Mannesmann-Meer AG-, 405 Mönchengladbach, Karmannsstr. 29

"Guillotine shears for cutting at high speed moving rolling stock, preferably pipes "

It is known that exit velocities are generated when the stretching of pipes is reduced of the hot pipe string reaches up to 10 m / sec

Since efforts are being made in this production, the unavoidable thickened ends by introducing pipe strings To limit up to 100 m as much as possible, you have to stretch 6 to 7 times for an outlet line from .w 600 to 700 m not only the space requirement, but also pay attention to the transport system accordingly, whereby special problems arise due to the high exit speeds.

To face these difficulties, the exiting Pipe string through suitable separating devices in individual pipe sections, e.g. in double sales lengths of m, the subdivision just after the

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Stretch-reducing mill is made by, flying saws, the can just about be used at the exit velocity of the pipe string given above.

A desired and technically possible increase the exit speed fails not only because of the permissible cutting performance of the saw blade, but also also that both saw feed rate and because of the risk of explosion, the saw blade eotation speed are limited.

It is well known that when separating square or Round iron so-called guillotine, where a . Rotate upper ^ and a lower knife on axles while on known electronic controls allow adjustment to any cutting length, with the sudden Effect of the knives cut through the rolled strand in fractions of a second «

The German patents Fr. 4-73 920, 595 588 and 1 022 describe such rotating guillotine shears that are used to cut solid profiles

A use for cutting hollow profiles by means of such, opposing knife failed due to the deformation of the hollow cross-section, so that more remarkable Waste arises and additional milling work was necessary «

- ■ 3 009837/0422

With regard to the small masses to be moved, these types of guillotine shears and their ability to cut suddenly, the task arises to further develop a known rotating guillotine shears, that hollow profiles with. increased speed leave the rolling mill ^., be properly separated.,

According to the invention, the task is achieved by a rotating Guillotine solved, at the in the vertical "plane within a closed stand at least three driven rollers with a circular arcuate, concave surface line are arranged, which each carry a circular arc-shaped, concave knife, which stand to one another ^ that they come into effect simultaneously, with the knife and the Support the rollers on the circumference.

The invention is shown in the drawings according to FIGS. Λ to 3, for example, and explained in more detail below,

Fig. 1 the stand with the driven rollers in the running direction of the pipe,

Fig. 2 the section A - A in Fig. 1 and Fig. 3 the possible installation of the stand with rollers in

represents a known C-finigen roll stand. . '' .. ",. '. ■■

In Figs. Ί and 2 the execution of the circular

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shaped, concave flyknife 1, their attachment in the rollers 2 and the drive of the rollers 2 via bevel gears 3 from the central shaft 4 and the accommodation of the rollers 2, 1 can be seen in one plane in the stand 5.

The function of the guillotine is triggered by the drive 4 ·, whose motor with electronic braking device switched and the peripheral speed of the rollers accelerated within a rotation angle of- ^ 270 °. that it is greater than the pipe speed at the moment of cutting, so that already during the cutting work a deceleration can take place in order to decelerate the rollers to zero shortly after the emergence, whereby the separation work over an angle of ^ 30 ° takes place.

In order to make the productivity of the plant economical, the required dimension changes must be carried out as quickly as possible

By choosing the common drive of the three rollers, it is possible, for example according to Fig. 3, to have one to choose known C-shaped roll stand 6, in which the stand 5 with rolls 2 with the aid of the Assembly table 7 and the transport device 8 laterally can be assembled very quickly.

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It is essential, "in this system, the idea of the invention, the material to be separated into the same .shaped ones due to the shape of the knives Rollers must be supported on all sides during the separation, so that a deformation, which the removal could interfere on roller tables to straightening machines, is designed.

- patent claims -

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Claims (3)

Claims; M, j guillotine shears for cutting at high speed "Moving rolling stock, preferably pipes, with two opposing knives rotating on axes, thereby characterized in that within a closed frame (5) in the vertical plane at least three driven Rollers (2) are arranged with a circular arc-shaped, concave surface line, each of which has a circular arc-shaped, Carry concave fly knife (1), which are to each other so that they are effective at the same time come, with the rollers and the knives supporting the material to be separated on the circumference. 2. Guillotine according to claim 2, characterized in that that die.Walzen (2) by a shaft (4) together over Bevel gears (3) are driven. 3. guillotine shears according to claim 1 and 2, characterized that the closed frame (5) with drive and rolling in the known C-shaped goods rack (6) is housed. 009837/042 2 Le e rse i i