DE1279604B - Process for avoiding winding breaks when running off metal strip wound into ring-shaped coils and device for carrying out the process - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B 21 c

German KL: 7b -47/18

Number: 1279 604

File number: P 12 79 604.2-14 (S 96130)

Filing date: March 23, 1965

Opening day: October 10, 1968

The invention relates to a method for avoiding winding breaks when running from to ring-shaped coils of wrapped metal tape, the tape in the area of the point at which it comes out of the Curved surface of the federal government runs tangentially, supported and against the support in the area of the permanent deformation and is kept at a distance from the point of curvature. When unwinding tapes wound into ring-shaped coils of certain dimensions and Strength areas often result in so-called coil breaks. It is here around kinks running transversely to the winding direction of the tape, which are in different thicknesses and spacings occur and are often very disruptive for the further use and processing of the tape. A device is known in which the tape at the bending point by a pressure roller is supported. When the band is bent open around this pressure roller by almost 90 °, this occurs Do not put any kinks or breaks in the tape, but this is caused by bending it back too much of the tape around this pressure roller in the course of the further pulling off of the tape on its upper side new winding break kinks or breaks.

The object of the present invention is to avoid these belt kinks or breaks.

To solve this problem, the invention proposes that the permanent deformation the The difference between the original and the desired shape of the band for further processing and that the band over the distance remains in the area of elastic deformation. In a preferred and inventive way is at prescribed procedure, the distance is smaller than the theoretical lap break jump.

In this way, when bending metal strips are now contrary to all known method winding breaks completely avoided.

The device for carrying out the method with a pressure roller constantly resting on the collar and a bending roller arranged at a distance from this on the other side of the belt according to the invention in that the bending roller of the pressure roller can be tracked.

To adapt the device described above to tapes of different dimensions and / or strength properties, an advantageous and inventive feature is characterized in that the bending roller can also be adjusted and locked in relation to a stationary pressure roller
when running off too ring-shaped collars
wound metal tape and device for
Implementation of the procedure

Applicant:

Sundwiger ironworks
Maschinenfabrik Grah & Co.,
5870 Hemer-Sundwig

Named as inventor:
Friedrich Müller, 5870 Hemer

is arranged, preferably such that the bending roller with respect to the pressure roller both approximately perpendicular is adjustable and lockable to the running tape and in the direction of its longitudinal extension.

Furthermore, an advantageous and inventive feature is characterized in that the above Subject, if necessary, all rollers can be driven by a motor.

There is an advantageous and inventive embodiment of the subject matter described above in that the pressure roller is supported on an almost radially extending straight guide, further on the axis of rotation of the roll holder is connected to a rocker that carries the bending roll, wherein this is preferably also arranged pivotably by means of a lever on the rocker and furthermore, the rocker in the region of its other end can be pivoted about a fixed point and in Is mounted displaceably in the direction of its longitudinal extent to the fixed point.

Through these measures, the role system is always the same or approximately the same equal bending ratios to the decreasing diameter when the tape is unwound Band collar tracked.

To simplify the operation of the device described above, an advantageous one is characterized and inventive feature in that

809 620'30

a guide roller is provided after the bending roller in the direction of travel of the tape, a deformation of the Band by the guide roller takes place only within the elastic deformability of the band.

In the figures, the device according to the invention is shown in exemplary embodiments. It shows

F i g. 1 a schematic representation of the device in the front view,

F i g. 2 a further embodiment, also in the front view,

F i g. 3 to 8 schematic representations of application examples.

In Fig. 1 is supported on the circumference of a collar 2 of a steel band 3 that is rotatably mounted on a reel 1 a pressure roller 4 which is relatively large in diameter. The latter is in one on one Frame-mounted straight guide 5 to the collar 2 slidably mounted. To achieve a sufficient Contact pressure for the roller 4, the roller holder 6 z. B. hydraulically against the federal government be pressed, provided that the weight of the roller 4 is not sufficient. On the axis 7 of the roller 4 one end of a rocker 8 is connected, the other end about an axis 9 of a support roller 10 is pivotable. In addition, the rocker 8 can move in a straight guide 11 in the direction of its Move longitudinal extension. A lever 12 is hinged to the rocker lockable, which on his Free end of a bending roller 13 for the metal strip 3 running from the collar 2 to the support roller 10 wearing.

In the case of the in FIG. 2 is shown during the unwinding of the metal strip 3 from the federal government 2 the latter moved with the reel 1 to the pressure roller 4. Here, too, as in Fig. 1, an adjustably arranged bending roller 13 and a support roller 10 are provided. It also has Embodiment a guide roller 14.

With the device, as shown in FIGS. 3 to 8, the following band shapes are shown can be achieved, namely (in dash-dotted lines)

a) a straight band (Figs. 3 and 4),

b) a band with a larger radius of curvature r 2 than before (Figs. 5 and 6),

c) a band of opposite curvature and a radius of curvature - r 2 (Figs. 7 and 8),

wherein the F i g. 3, 5 and 6 the device at the beginning and the F i g. 4, 6 and 8 shortly before the end of the Represent the unwinding process.

Here is in the embodiments a. b and c the immersion depth "/" of the roller 13 different.

It results, for example, from steel belts with the following values:

60 With the above steel strips I and II, this is according to the formula

2 σ F

for I 4-

21

21 I. II Yield point d F 21 kp / mm ² 44 kp / mm ² Measure of elasticity E 10 000 kg / mm ² 22,000 kgf / mm ² Thickness h mm 3 mm and a roll 300 mm distance A from 600 mm from the Springback.

3 21000

and

for II 4-

44

60O ²
10

300 ²

3 22000

= 24 mm

= 40 mm.

Correspondingly, the bending roller is 1 mm deep in the case, and 40 mm deep in the case of the desired one Immerse band shape. The immersion depth is independent of the previous one Belt curvature and is therefore kept the same according to the invention during the entire belt run.

In practice, however, the immersion depth does not need to be calculated, but is based on visual inspection set, since they are essentially made to obtain a certain band curvature will.

To avoid winding breaks, it is only necessary to ensure that the resulting band curvature corresponds approximately to the desired band curvature, so that after leaving the support no deformation beyond the elastic range is required.

Claims (8)

Patent claims: 1. Procedure to avoid winding breaks when running off of metal tape wound into ring-shaped coils, the tape in the area of the point at which it comes out of the Curvature surface of the federal government runs tangentially, supported and against the support in the Area of permanent deformation is curved up and at a distance from the point of curvature is held, characterized in that that the permanent deformation is the difference between the original and corresponds to the band shape desired for further processing and that the band is over the distance remains in the area of elastic deformation. 2. The method according to claim 1, characterized in that the distance is smaller than that theoretical lap break jump. 3. Apparatus for performing the method according to claim 1 or 2 with a constantly pressure roller resting against the collar and one at a distance from this on the other side of the belt arranged bending roller, characterized in that the bending roller (13) of the pressure roller (4) is traceable. 4. Apparatus according to claim 3, characterized in that the bending roller (13) also is arranged adjustable and lockable with respect to a stationary pressure roller (4). 5. Apparatus according to claim 3 or 4, characterized in that the bending roller (13) opposite the pressure roller (4) both approximately perpendicular to the unwinding belt (3) and in The direction of the longitudinal extension can be adjusted and locked. 6. Device according to one or more of the preceding claims, characterized in that, if necessary, all rollers (4/13/14) can be driven by a motor. 7. Device according to one or more of the preceding claims, characterized in that that the pressure roller (4) is supported on an almost radial straight guide (5) is, furthermore, a rocker (8) is connected to the axis of rotation of the roll holder, which the bending roll (13), which is preferably also pivotable by means of a lever (12) the rocker (8) is arranged, and wherein Furthermore, the rocker (8) in the region of its other end can be pivoted about a fixed point and in Is mounted displaceably in the direction of its longitudinal extent to the fixed point. 8. Device according to one or more of the preceding claims, characterized in that that a guide roller (14) is provided after the bending roller (13) in the direction of travel of the tape is. Considered publications:
German Patent No. 693 163;
German utility model No. 1 900 864,1769010. For this purpose 2 sheets of drawings IM f »<M». tt φ Bundwdruckm! BnVn