DE2012742A1 - Process for treating a metal strip and device for carrying out the process - Google Patents

Description

6 f'iaiikiuri a. M. 1.

Park street 13

6216 BETHLEHEM STEEL CORPORA.TlOH, Bethlehem, Pennsylvania, V.St.A.

Method for treating a metair band and device for carrying out the method.

The invention relates to a method for treating a metal strip and to a device for carrying out the method. In particular, the invention relates to an apparatus for forming protrusions along the edges of a steel strip. The invention also relates to a method for treating a metal strip, in which the metal strip is wound around a vertical axis in such a way that adjacent turns are separated from one another by the projections. Ä

There are "many methods of treating steel strip which require that the strip be wound openly - that is, that the strip be wound in such a manner that adjacent turns are separated from each other so as to expose the entire surface of the strip to gases A typical process of this type is the plating process, in which ferrochrome powder is compacted on the surface of the strip, which is then heated in an oven to such a high temperature that the Powder diffused into the steel strip in order to form a coating of an iron-chromium alloy on it

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Spooling or winding prevents the turns of the winding from welding together and also enables an intimate Contact between the furnace atmosphere and the surface of the coated .Bandes.

It is known to generally wrap openly in that inserting two zigzag steel wires or the like between the turns of the winding during its manufacture, wherein spacing each wire approximately 25.4 mm (1 inch) from the top and bottom of the tape. These The wires are pulled from the tape during the unwinding of the winding removed after the chrome plating heat treatment. However, the wires often become brittle and also sit as a result the heat treatment on the surface of the tape. The consequence is that these wires during the unwinding process break. In addition, at least two men are required to remove the wire.

It has also been proposed to separate the turns of a winding from a tape from one another in that depressions and corresponding projections are formed along the edges of the tape. This method of separation proves however, it is impractical because the protrusions along the edges of a turn often extend into the depressions insert the edges of an adjacent turn.

The invention is based on the object of providing a device which embosses the edges of the steel strip or forms raised areas such that the strip can be wound openly without nesting or interlocking occurring. It is further provided a method for the treatment of the steel strip are provided, the vonjeiner such a device ■ (Jtbrauoh maoht.

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The method of treating the metal strip is according to the invention characterized by forming a row of spaced apart projections along each Edge of the tape, with at least some 'of the distances between adjacent projections not being the same, winding the Bandes., Whereby essentially all projections come into contact with undeformed parts of adjacent band windings, so that adjacent turns are separated by a distance which is equal to the height of the projections and subjecting the wound tape to a treatment process, to prevent the properties of the metal tape.

The device according to the invention has a wave that is rotatably mounted in a frame and on the coaxially first and second wheel bodies are attached. Along the perimeter of a Each wheel body is provided with a plurality of spaced projections with at least some spacing therebetween adjacent projections are unequal. In the frame is Furthermore, a counter-pressure roller is rotatably mounted, which has numerous grooves in its circumferential surface. These grooves are supposed to are brought into register or engagement with the projections during rotation of the shaft.

A passed through the device according to the invention Steel belt is characterized by a plurality of spaced apart projections along its both edges. The tape can be wound around a vertical axis - with practically all protrusions in contact with it Non-deformed parts come from adjacent turns of the tape, and the wound or reeled tape can then be treated be subjected to change the properties of the metal strip. According to a further embodiment of the The method of the invention can then remove the protrusions from the edges of the tape.

0098U / 1590 BAD ORIGINAL

The invention will now be described in detail with reference to the accompanying drawings, all of which are derived from the description and the details or features emerging from the figures can contribute to the solution of the problem within the meaning of the invention were included in the application with the intention of being patented. Show it:

Figure 1 is a partial front view illustrating the essential features of the device according to the invention .

FIG. 2 is an enlarged sectional view taken along the line -: - 2-2 of FIG. 1, partially cut away to show details of the device according to the invention.

FIG. 3 is a schematic view of the device shown in FIG a heat treatment process for chrome plating.

Description of the preferred embodiment

As shown in Figure 1, the present apparatus comprises a frame 10 containing two vertical rails 12, the upper ends of which are connected by a horizontal rail H. The frame is provided with a conventional load-bearing base part (not shown) and has a horizontal bearing plate 16 which is inserted between the vertical rails 12. Fixed bearings 18, in which the shaft 20 of a vertically arranged counter-embossing roller 22 is mounted, are fastened to the rail 14 and the bearing gap 16. In addition to these fixed bearings, horizontally displaceable bearings 24 are also arranged on the rail 14 and the bearing plate 16, in which the shaft 26 of a vertically arranged engaging embossed body 28 is mounted. Each adjustable

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Bearing 24 is provided with a threaded sleeve (not shown), which is in engagement with "a threaded spindle 30, which is connected to a handwheel 32, when rotated, the relevant Bearing is moved horizontally. The gap between the backing roll 22 and the engaging body 28 can thus be divided to accommodate strips of different thicknesses

to record. The shafts 20 and 26 are ι with inhibiting teeth.

wheels 34 provided, whereby the shafts rotated synchronously ·;

can be. The engaging embossing body 28 has two;

vertically adjustable hubs 36, which are connected to the shaft 26 *

are wedged. One of these hubs is at the lower end of the '^

Shaft 26, while the other hub is attached to any jj

Point along the top half of the shaft '

can. The exact attachment point depends on the width of the I.

to be embossed. On both hubs 36 there is an embossing '' i wheel 38 attached, which has numerous spaced apart projections 40 along its circumference .. To the

To significantly reduce the likelihood of the projections - ·· '

along the edges of a tape, look for appropriate links;

indentations in adjacent turns during winding, | of the tape are at least some of the gaps

between adjacent protrusions · not equal. Preferential '■

wise the distance between each pair differs "!

from adjacent protrusions as shown in FIG. ^

In order to enable a projection and a ι

Depression on the two upper and lower edges of the tape '.

to prevent, the projections 40 of the upper and lower ·

Wheel 38 axially misaligned or offset from one another. ■ j

The protrusions 40 are made from a square material one end of which is machined to form a blunt point which is a protrusion. Every four-! ; The socket pin is inserted into a sleeve 42 which is press fit into an axial bore in the wheel 38. The inner end of the sleeve 42 has a thread and is provided with a screw 44, thereby d.ie axial position \

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of the square pin and thus the extent to which the projection 40 over the circumference of the wheel 38 can be adjusted protrudes. The square pin is secured in the installation position by means of an adjusting screw 46.

The counter-embossing roller 32 is provided with a number of grooves 48 in their peripheral surface provided. These grooves can be brought into congruence or engagement with the projections 40 and are preferably arranged axially as shown in the drawings. However, the grooves can also be in the circumferential direction are arranged, each groove being intended for use with a tape of a certain width, and in this Pail a synchronization of the rotation of the engaging and female parts is not required. Figure 2 shows the projections 49 in a band 50 between an engaging Embossing wheel 38 and a counter roller 22 runs through, which with axial grooves is provided.

Figure 3 shows a typical application of the device according to the invention, namely as part of the device for a Chrome plating heat treatment is used. For details of the chrome plating process, refer to the USA. See U.S. Patent 3/312,546 which is issued to E.H. Kayer et al on April 4, 1967 and owned by the applicant. The procedure is only described in general below.

A steel tape 50 coated with a ferrochrome powder is placed on the tight winding table 52 of a conventional open winding machine. The tape 50 is drawn 54 ACCORDANCE der'Erfindung through the embossing machine and wound open on the table 56 for the loose winding of the machine to an open winding, with substantially all Voraprünge 49 · long & n edges corresponds of the tape 50, gQgQn undeformed parts from adjacent turns of the tape. The open winding is then placed in a tempering furnace 58 and in

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heated in a controlled atmosphere, which preferably contains a halogen gas, to prevent the diffusion of the chromium -in the To effect the surface of the steel belt 50.

After the heat treatment in the tempering furnace 58, the tape 50 is wound onto the open winding table 60 of a second conventional open winding machine. is seated and passed through a set of nip rollers 62/62 which remove the protrusions 49 from the edges of the belt 50. However, the tape can also be passed through a conventional edge-cutting machine. The M band is then to eliminate in a bath 64 acid from dilute nitric ^J washed to remove traces of any Haloidsälzen, which have been deposited on the tape, and then wirdjlas band on the table 66, a density of winding of the second machine to the open winding tightly wound up. The tape can then be treated in the usual way, for example tightly rolled, slit and peeled off; be separated.

009844/1590

Claims (7)

Claims 1. A method for treating a metal strip, characterized by forming a Series of spaced apart projections along each edge of the belt, at least some of the spacings between adjacent projections are not equal, winding the tape, with substantially all projections come into contact with undeformed parts of adjacent tape turns, so that adjacent turns by a distance are separated from each other, which is equal to the height of the s is cracking and subjecting the wound tape to one Treatment process to prevent the properties of the metal strip. 2. ^A method according to nspruch 1, characterized by removing the Protrusions from the edges. 3. The method according to claim 1 or 2, characterized by passing through of the ribbon by orphans who level the protrusions. ■ 4. The method according to claim 1 or 2, characterized by severing the Edges of the tape within the protrusions. 5. Device for carrying out the method according to one or several of the preceding claims, characterized by first and second Wheel bodies which are mounted coaxially on a shaft which is rotatably supported in a frame; -ine plurality of be ~ abstandeten Vorsprungen along - 'ΰ, η circumference of a joed ^ n Reä body, wherein at least aiuige άατ distances be Witschen, IÖ <;, i> disclosed Vorsprün.. * _n r :: h; &'* ± ca dirr ^ and du.rc'i υίν- ^ in ά' ^ frame -.r.ya- ^; --n wheel body * rotatably mounted C «,, ^ -, -»! ^. 009844 / 15S6 BAD ORIQfNAI. numerous grooves are provided in the circumferential surface which ■ during the rotation of the shaft in engagement with the projections, come. 6. Apparatus according to claim 5,
characterized, that the grooves are arranged axially and at a distance from one another which corresponds to the distance between the projections and that a device connects the shaft and roller so that their movements are synchronized .. · 7. Apparatus according to claim 6,
characterized, that the projections on the first wheel body with respect to the Projections on the second wheel body are axially offset. ReFu / Lo 0098U / 1590